UPLINK TRANSMISSION CONTROL WITH CLEAR CHANNEL ASSESSMENT

摘要

A method, an apparatus, and a computer program product for wireless communication are provided. An eNB transmits pre-grant(s) to a UE(s) for a target resource on a contention-based carrier. In response, the UE(s) perform a CCA/eCCA and, when successful, transmit a preamble to the eNB based on the pre-grant. The eNB detects the preamble(s) and transmits grant confirmation(s) to the UE(s) for which a preamble was detected. The grant confirmation(s) may modify the pre-grant(s). The eNB may overschedule a target resource and based on the received preambles may transmit grant confirmation(s) that instruct a portion of the UEs for which a preamble was received to transmit data on a target resource and may instruct the remaining portion of the UEs for which a preamble was received to cease or modify data transmission.

主权项

1. A method of wireless communication, comprising:
receiving a pre-grant assignment at a user equipment (UE); performing a clear channel assessment (CCA) operation on a secondary component carrier (SCC) based on the pre-grant assignment; transmitting a preamble on the SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE; and receiving a grant confirmation in response to the preamble transmission.