Method and system for recovering from DRX timing de-synchronization in LTE
View Patent ↗A method for recovering from discontinuous reception (DRX) timing de-synchronization between the UE and the eNB in an LTE_ACTIVE state having the steps of: the eNB detecting DRX timing de-synchronization; transmitting an indicator to a User Equipment (UE) to resume continuous reception; and waiting for an indication from the UE of whether a Continuous Reception Response or Continuous Reception Notification was received.
1. A method for operating a user equipment (UE) in a wireless communication network, wherein the method is performed by the UE, the method comprising:
while the UE is in a Discontinuous Reception (DRX) operation, waking up a receiver of the UE at a wake up time based on an offset plus N times a DRX interval, wherein N is an integer greater than or equal to zero; and
checking whether data addressed for the UE is available from a network element while the UE is awake.
2. The method of claim 1 , further comprising: receiving a radio resource control (RRC) protocol message including at least one of the offset or the DRX interval.
3. The method of claim 1 , further comprising: increasing the DRX interval if no data is received after a predetermined time period.
4. The method of claim 3 , wherein the predetermined time period is based on a set number of DRX cycles.
5. The method of claim 1 , wherein the UE is configured to be associated with a Long Term Evolution (LTE) network.
6. A user equipment (UE) for operating in a wireless communication network, the UE comprising:
a wireless receiver; and
a processor,
wherein, while the UE is in a Discontinuous Reception (DRX) operation, the UE is configured to wake up the receiver at a wake up time based on an offset plus N times a DRX interval, where N is an integer greater than or equal to zero, and
wherein the UE is further configured to check whether data addressed for the UE is available from a network element while the UE is awake.
7. The user equipment of claim 6 , wherein the UE is further configured to receive a radio resource control (RRC) protocol message including at least one of the offset or DRX interval.
8. The user equipment of claim 6 , wherein the UE is further configured to increase the DRX interval if no data is received after a predetermined time period.
9. The user equipment of claim 8 , wherein the predetermined time period is based on a set number of DRX cycles.
10. The user equipment of claim 6 , wherein the UE is configured to be associated with a Long Term Evolution (LTE) network.
11. An enhanced Node B (eNB) for operating in a wireless communication network, the eNB comprising:
a communications subsystem configured to communicate with a user equipment (UE) to configure the UE such that, while the UE is in a Discontinuous Reception (DRX) operation, the UE wakes up at a wake up time based on an offset plus N times a DRX interval, wherein N is an integer greater than or equal to zero,
wherein the eNB is configured to send data to the UE while the UE is awake.
12. The eNB of claim 11 , wherein the eNB is configured to transmit a radio resource control (RRC) protocol message including at least one of the offset or DRX interval.
13. The eNB of claim 11 , wherein the eNB is part of a Long Term Evolution (LTE) network.
14. A method for operating an enhanced Node B (eNB) in a wireless communication network, wherein the method is performed by the eNB, the method comprising:
communicating with a user equipment (UE) to configure the UE such that, while the UE is in a Discontinuous Reception (DRX) operation, the UE wakes up at a wake up time based on an offset plus N times a DRX interval, wherein N is an integer greater than or equal to zero, and
sending data to the UE while the UE is awake.
15. The method of claim 14 , wherein communicating with the user equipment comprises transmitting a radio resource control (RRC) protocol message including at least one of the offset or DRX interval.
16. The method of claim 14 , wherein the eNB is part of a Long Term Evolution (LTE) network.