Multiplexing logical channels in a mixed licensed and unlicensed spectrum carrier aggregation

摘要

Downlink control signalling from a network to a user equipment UE associates at least a first logical channel or radio bearer with a first component carrier in a licensed frequency band and associates at least a second logical channel or radio bearer with a second component carrier in an unlicensed frequency band. The UE uses the associations to select which uplink data is sent on the first and second component carriers by multiplexing the uplink data on the at least first and the at least second logical channels or radio bearers. Delay sensitive data may be sent via the licensed frequency band. By example the downlink control signalling may be a MAC control element in RRC _Connection_ Reconfiguration message which semi-statically defines a multiplexing allowance for each of the logical channels or radio bearers. An example MAC control element has an information tuple giving the association and multiplexing status per channel/bearer. Certain embodiments also adapt transmit power scaling for licensed/unlicensed band operation.