Patent ID: 10602491

Abstract:
The present invention provides a communication method and device on an unlicensed frequency band in a UE and a base station. To solve a scheduling problem caused by adoption of more flexible uplink and downlink sub frame configuration in an unlicensed spectrum, a UE receives high layer signaling sent by a base station. The high layer signaling indicates that a first carrier can be scheduled by control signaling transmitted in a second serving cell. The high layer signaling indicates that the first carrier can be scheduled by control signaling transmitted on the first carrier, or the first carrier can be scheduled by control signaling transmitted on the first carrier by default. The first carrier is deployed in an unlicensed spectrum, and the second serving cell is deployed in a licensed spectrum. The present invention supports adoption of more flexible uplink and downlink sub frame configuration in an unlicensed spectrum without introducing a new HARQ time sequence, and therefore, the spectrum efficiency is effectively improved. The present invention reuses the scheme in an existing cellular system as much as possible and thus has good compatibility.