Discontinuous reception (DRX) enhancements in LTE systems
Embodiments of a system and method for providing DRX enhancements in LTE systems are generally described herein. In some embodiments, a system control module is provided for controlling communications via a communications interface. A processor is coupled to the system control module and is arranged to implement an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on the physical downlink control channel for control signals, the processor further monitoring subframes after the active time.
1. A user equipment (UE) comprising:
transceiver circuitry arranged to:
receive discontinuous reception (DRX) parameters from an evolved Node-B (eNB), the DRX parameters including a long DRX cycle parameter and a long DRX cycle start offset parameter,
the long DRX cycle start offset parameter to configure the UE to support one of a plurality of long DRX cycles that includes a long DRX cycle of seventy subframes; and
processing circuitry arranged to monitor a control channel in subframes as indicated by the DRX parameters.
2. The UE of claim 1 , wherein the long DRX cycle start offset parameter configures the UE to a long DRX cycle of seventy subframes responsive to a UE indication of support for in-device coexistence (IDC).
3. The UE of claim 1 , further comprising two or more antennas.
4. The UE of claim 1 , wherein the transceiver circuitry is further arranged to communicate using Bluetooth communication.
5. The UE of claim 4 , wherein the transceiver circuitry is configured to operate in a time division duplex (TDD) uplink/downlink (UL/DL) configuration 0.
6. The UE of claim 1 , wherein:
the UE is configurable to support the long DRX cycle and a short DRX cycle, the DRX parameters further comprising a short DRX cycle parameter and a short DRX cycle start offset parameter, and
to monitor the control channel, the processing circuitry is arranged to decode downlink control information (DCI) of the PDCCH for a Cell Radio Network Temporary Identifier (C-RNTI) of the UE at a subframe dependent on which of the short or long DRX cycle the UE is in.
7. Baseband processing circuitry of a user equipment (UE), the baseband processing circuitry comprising:
transceiver circuitry arranged to:
receive discontinuous reception (DRX) parameters from an evolved Node-B (eNB), the DRX parameters including a long DRX cycle parameter and a long DRX cycle start offset parameter, the long DRX cycle start offset parameter to configure the UE to support one of a plurality of long DRX cycles that includes a long DRX cycle of seventy subframes for operation in time division duplex (TDD) uplink/downlink (UL/DL) configuration 0; and
processing circuitry arranged to monitor a control channel in subframes as indicated by the DRX parameters.
8. The baseband processing circuitry of claim 7 , wherein the processing circuitry is further arranged to provide an indication that the UE supports in-device co-existence (DC).
9. The baseband processing circuitry of claim 7 wherein the baseband processing circuitry is configured as part of a user station configured for communication with a base station of the 3GPP LTE network.
10. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user station to configure the user station to perform operations to:
receive discontinuous reception (DRX) parameters from an evolved Node-B (eNB), the DRX parameters including a long DRX cycle parameter and a long DRX cycle start offset parameter,
the long DRX cycle start offset parameter to configure the UE to support one of a plurality of long DRX cycles that includes a long DRX cycle of up to seventy subframes; and
processing circuitry arranged to monitor a control channel in subframes as indicated by the DRX parameters.
11. The non-transitory computer-readable storage medium of claim 10 , wherein the long DRX cycle start offset parameter is set to seventy subframes responsive to a UE indication of support for in-device coexistence (IDC).