| 摘要 |
Methods and apparatus for providing feedback on channel conditions in a wireless telecommunications system are described. At least one terminal device within the system is a reduced capability terminal device, such as an MTC device, comprising a tunable transceiver configured to receive downlink transmissions from the base station using a virtual carrier, which uses a restricted frequency bandwidth which is smaller than and within the system bandwidth. A base station indicates to the terminal that it should measure channel conditions for different frequencies. The terminal sequentially tunes its transceiver to different frequency locations for the restricted frequency bandwidth and making measurements of channel conditions. The terminal device communicates information derived from the measurements to the base station. The information may comprise an indication of frequency locations for which measurements of channel conditions meet a pre-defined selection criterion. The downlink frame structure may comprise a series of time-slots, with measurements of conditions for different frequency locations being made in different time slots. Consecutive measurements may be made in non-consecutive time-slots. The base station may subsequently schedule downlink transmissions for the terminal device in a manner that takes account of the information received from the terminal device. |
