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Signal exchange equipment and method for time division duplex and frequency division duplex carrier aggregation in wireless communication system

  • US 10,313,004 B2
  • Filed: 03/26/2015
  • Issued: 06/04/2019
  • Est. Priority Date: 03/26/2014
  • Status: Active Grant
First Claim
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1. An apparatus for a terminal in a wireless communication system, the apparatus comprising:

  • a transceiver configured to;

    transmit, to a base station, through a first carrier for a primary cell, a first message, notifying that the terminal supports time division duplex (TDD) frequency division duplex (FDD) carrier aggregation (CA) using the first carrier based on the FDD and a second carrier based on the TDD, wherein the first message comprises information regarding a supportable combination of frequency bands including a first band among frequency bands used for FDD and a second band among frequency bands used for TDD, andif the base station determines to configure the terminal to perform the TDD-FDD CA based on the first message, receive, from the base station, through the first carrier, a second message for indicating to add a secondary cell at the second carrier, wherein the second message comprises an index of the secondary cell and frame configuration information for the second carrier; and

    at least one processor configured to;

    identify at least one uplink subframe for the second carrier based on the frame configuration information, andperform the TDD-FDD CA to communicate with the base station without estimating downlink channel on the at least one uplink subframe based on the frame configuration information of the second carrier,wherein the first carrier is used to perform downlink communications and uplink communications based on the FDD,wherein the second carrier is used to perform downlink communications without uplink communications according to the frame configuration information, andwherein downlink data received through the second carrier is received through at least one downlink subframe identified by the frame configuration information.

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