Method and apparatus for performing and reporting measurements by user equipment configured with multiple carriers in mobile communication systems
摘要
說(shuō)明書
UE receives, from the ENB, general DRX configuration information and DRX configuration information to be applied to an MTC device in operation 2700. Like general DRX configuration information, the DRX configuration information to be applied to an MTC device can be explicitly indicated to the MTC device. The MTC device can derive part of the DRX configuration information, such as on-duration, drx-InactivityTimer, drx-RetransmissionTimer, etc., considering the EPDCCH repetition interval or the data repetition interval, instead of receiving details regarding the DRX configuration from the ENB. For example, the timer value of the drx-RetransmissionTimer and on-duration can be identical with the repetition interval of EPDCCH. The value of the drx-InactivityTimer can be identical with the repetition interval of data. The legacy RTT timer has eight sub-frames in FDD and k+4 sub-frames in TDD. k denotes a time interval between times transmitting HARQ feedbacks related to the downlink transmission timing. The unit is sub-frame. The RTT timer value applied to an MTC device can be a repetition interval of data or the sum of a repetition interval of data and the legacy RTT timer value. In a case where the MTC device derives the DRX configuration information, the ENB needs to transmit, to the MTC device, an indicator informing that DRX configuration information for MTC devices, not legacy DRX configuration information, is available.
The MTC device determines whether its mode is a normal mode or coverage extension mode in operation 2705. When the MTC device is in a normal mode in operation 2705, it can apply general DRX configuration information in operation 2710. When the MTC device is in a coverage extension mode in operation 2705, it can apply new DRX configuration information for coverage extension in operation 2715.
