Method and arrangement for user equipment switching between carriers in different frequency bands

摘要

Method and arrangement in a base station for scheduling communication between the base station and a user equipment in a multi-carrier communication network system. The base station and the user equipment are comprised in the multi-carrier communication network system, and adapted to communicate with each other on downlink carriers and uplink carriers in at least a first frequency band and a second frequency band over a radio interface. The method comprises signalling an indication to the user equipment on the downlink carrier in the first frequency band, which the user equipment currently is scheduled on, to switch to a second carrier in order to communicate data and/or control signalling on the second carrier. In addition, a method and arrangement in a user equipment for assisting the base station in scheduling radio resources are described.

主权项

1. A method for controlling a user equipment in a multi-carrier communication network, the multi-carrier communication network comprising at least one base station, the user equipment comprising a radio interface adapted to communicate via a plurality of frequency bands, wherein the radio interface is configured with a first downlink carrier and with a first uplink carrier in a first frequency band and with a second downlink carrier and with a second uplink carrier in a second, different, frequency band, the method comprising causing the user equipment to:
schedule the radio interface to receive data via the first downlink carrier and to transmit data via the first uplink carrier while maintaining association with both the first and the second downlink carriers and both the first and the second uplink carriers; monitor the first downlink carrier for a scheduling signal for the second downlink carrier and the second uplink carrier; and responsive to receipt of the scheduling signal, use the scheduling signal to cause the radio interface to receive data via the second downlink carrier and to transmit data via the second uplink carrier, and monitor for a further scheduling signal for the first downlink carrier and the first uplink carrier to cause the radio interface to receive data via the first downlink carrier and to transmit data via the first uplink carrier while maintaining an active communication connection with both the first and the second downlink carriers and both the first and the second uplink carriers to permit automatic switching between the first and the second downlink carriers and the first and the second uplink carriers.