Propagation delay difference reporting for multiple component carriers

摘要

The invention relates to methods for reporting on downlink timings by a mobile terminal in a mobile communication system. In order to allow for an aggregation access point to obtain information on propagation delay differences of downlink transmissions on aggregated serving cells, the invention suggests the mobile terminal to report timing information based on reception time difference information for a the target/reference cell. The mobile terminal performs measurements relating to transmission and/or reception time differences on the target/reference cell, and reports same to the eNodeB. The eNodeB compares the measurement result to a predefined maximum propagation delay time difference. Alternatively, the mobile terminal performs the measurements, compares same to the predefined maximum propagation delay time difference and then report the comparison result to the eNodeB.

主权项

1. A method, comprising:
receiving, by a mobile terminal, downlink transmissions of a first radio cell having a downlink component carrier and a time-aligned uplink component carrier and of a second radio cell having a downlink component carrier and a non-time-aligned uplink component carrier; determining, by the mobile terminal, a reception time difference or propagation delay difference for downlink transmissions from an aggregation access point to the mobile terminal via the downlink component carrier of the first radio cell and via the downlink component carrier of the second radio cell, respectively; and aligning uplink transmissions transmitted from the mobile terminal to the aggregation access point via the uplink component carrier of the first radio cell and the uplink component carrier of the second radio cell to arrive at the aggregation access point simultaneously, the aligning including adjusting a timing advance for uplink transmissions on the uplink component carrier of the second radio cell based on the timing advance for uplink transmissions on the time aligned uplink component carrier of the first radio cell and the determined reception time difference.