×

Uplink transmission control with clear channel assessment

  • US 10,524,236 B2
  • Filed: 03/09/2016
  • Issued: 12/31/2019
  • Est. Priority Date: 03/23/2015
  • Status: Active Grant
First Claim
Patent Images

1. A method of wireless communication at a User Equipment (UE), comprising:

  • receiving, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC;

    performing a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment;

    transmitting a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE;

    receiving a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and

    transmitting or refraining from transmitting the uplink data according to the grant confirmation received from the base station.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×