Efficient SRS resource indication methods

  • US 10,374,768 B2
  • Filed: 11/20/2018
  • Issued: 08/06/2019
  • Est. Priority Date: 10/02/2017
  • Status: Active Grant
First Claim
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1. A method in a wireless device, operable in a cellular wireless communication network, of identifying reference signal resources to be used in a transmission by the wireless device, the method comprising:

  • receiving signaling configuring the wireless device with a plurality of reference signal resource groups, each group comprising a plurality of reference signal resources;

    receiving an indication, in a control channel, of a selection of reference signal resources to be used, wherein each of the plurality of reference signal resources to be used is selected from a different one of the plurality of reference signal resource groups such that reference signal resources belonging to the same reference signal resource group are not selected for simultaneous use; and

    transmitting a reference signal to a network node in the network using the indicated selection of reference signal resources,wherein the indication of the plurality of reference signal resources to be used includes a bit field, the length of the bit field depending on a maximum number of MIMO layers that the wireless device is capable of transmitting and a number of reference signal resources in a corresponding one of the reference signal resource groups.

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