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Scheduling timing design for a TDD system

  • US 10,374,783 B2
  • Filed: 05/12/2017
  • Issued: 08/06/2019
  • Est. Priority Date: 03/16/2012
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a receiver to receive, at a user equipment (UE), an indication of an uplink/downlink (UL-DL) subframe configuration of a scheduling cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling;

    the receiver further to receive an indication of a UL-DL subframe configuration of a scheduled cell in the wireless TDD system, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell; and

    a processor to identify a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and scheduled cell;

    wherein the receiver is further to receive, from the scheduling cell of an enhanced NodeB (eNB), a hybrid automatic repeat request (HARD) signal of the scheduled cell according to a subframe timing of the reference UL-DL subframe configuration; and

    wherein;

    the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 1, 2, 3, or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 6;

    the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 3 or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 0; and

    the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 1.

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