Control signal management system and method
View Patent ↗A user equipment (UE) including a processor configured to transmit control plane data irrespective of on-duration/off-duration status.
1. A user equipment (UE), comprising:
a processor configured to:
transmit control plane data during an unscheduled on-duration associated with a discontinuous reception (DRX) mode of operation;
start a timer subsequent to transmission of the control plane data during the unscheduled on-duration, the timer defining a period of time during which the UE remains awake after the control plane data is transmitted in the unscheduled on-duration, wherein the period of time is specified by an enhanced node B (ENB), and
transition to a scheduled off-duration when the period of time expires, wherein scheduled on-durations and scheduled off-durations of the UE are not changed by the unscheduled on-duration,
wherein the DRX mode of operation defines a scheduled on-duration followed by a scheduled off-duration.
2. The UE of claim 1 wherein the processor is further configured to transmit user plane data only during the scheduled on-durations.
3. The UE of claim 2 wherein the user plane data includes application layer data including VoIP data packets, and data packets containing information related to web browsing, emailing, and other user applications.
4. The UE of claim 1 wherein the control plane data includes control signaling including at least one of:
a Layer 1 scheduling request;
a Layer 2 radio resource control (RRC) message; or
a mobility measurement message.
5. The UE of claim 1 wherein the timer is a response timer configured to keep the UE awake for a period of time sufficient for the UE to receive a response signal or other control signal from the ENB.
6. The UE of claim 1 further comprising a timing alignment timer configured to promote uplink synchronization between the UE and the ENB, the timing alignment timer to measure a predefined time and promote release of channel resources upon expiration of the timing alignment timer.
7. The UE of claim 6 wherein the UE releases the channel resources when the UE does not receive a timing alignment signal from the ENB for the predefined time.
8. A method of transmitting control plane data from a user equipment (UE) to an enhanced node B (ENB), the method comprising:
transmitting control plane data during an unscheduled on-duration associated with a discontinuous reception (DRX) mode of operation;
starting a timer subsequent to transmitting the control plane data during the unscheduled on-duration, the timer defining a period of time during which the UE remains awake after the control plane data is transmitted during the unscheduled on-duration, wherein the period of time is specified by the ENB; and
transitioning to a scheduled off-duration when the period of time expires, wherein scheduled on-durations and scheduled off-durations of the UE are not changed by the unscheduled on-duration,
wherein the DRX mode of operation defines a scheduled on-duration followed by a scheduled off-duration.
9. The method of claim 8 , further comprising transmitting user plane data only during the scheduled on-durations.
10. The method of claim 9 , wherein the user plane data comprises application layer data comprising VoIP data packets, and data packets containing information related to web browsing, emailing, and other user applications.
11. The method of claim 8 , wherein the control plane data comprises control signaling comprising at least one of:
a Layer 1 scheduling request;
a Layer 2 radio resource control ‘RRC’ message; or
a mobility measurement message.
12. The method of claim 8 , wherein the timer is a response timer configured to keep the UE awake for a period of time sufficient for the UE to receive a response signal or other control signal from the ENB.
13. The method of claim 8 , further comprising measuring a predefined time and promoting release of channel resources upon expiration of a timing alignment timer, and releasing the channel resources when the UE does not receive a timing alignment signal from the ENB for the predefined time.
14. A non-transitory computer readable medium storing instructions that when executed by one or more processors cause the one or more processors to:
transmit control plane data during an unscheduled on-duration associated with a discontinuous reception (DRX) mode of operation;
start a timer subsequent to transmitting the control plane data during the unscheduled on-duration, the timer defining a period of time during which the UE remains awake after the control plane data is transmitted during the unscheduled on-duration, wherein the period of time is specified by the ENB; and
transition to a scheduled off-duration when the period of time expires, wherein scheduled on-durations and scheduled off-durations of the UE are not changed by the unscheduled on-duration,
wherein the DRX mode of operation defines a scheduled on-duration followed by a scheduled off-duration.