Mechanisms for doppler shift indication and handling
Doppler pre-compensated control and data signal(s) generated using first and second Doppler pre-compensation patterns, respectively, are transmitted. A signal indicating the Doppler pre-compensation patterns is transmitted. The Doppler pre-compensated control signals comprise synchronization signals, system information blocks (SIBs), a radio resource control (RRC) message, or a physical downlink control channel (PDCCH), and the Doppler pre-compensated data signals comprise a physical downlink shared channel (PDSCH). The signal indicating the Doppler pre-compensation patterns comprises one of an RRC message or a PDCCH, and may indicate absolute Doppler values or a difference between Doppler values. The PDCCH may indicate a time offset between the PDCCH PDSCH.
1. A user equipment (UE), comprising:
a transceiver configured to
receive one or more Doppler pre-compensated control signals generated based on Doppler pre-compensation on control signals using a first of Doppler pre-compensation patterns,
receive a signal indicating the Doppler pre-compensation patterns, and
receive a Doppler pre-compensated data signal generated based on Doppler pre-compensation on a data signal using a second of the Doppler pre-compensation patterns; and
a processor operably coupled to the transceiver, the processor configured to demodulate and decode the Doppler pre-compensated data signal based on the Doppler pre-compensation patterns.
2. The UE of claim 1 , wherein the control signals are used to access a network in order to receive the data signal.
3. The UE of claim 1 , wherein the control signals comprise one or more of a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, or a physical downlink control channel (PDCCH), and
wherein the data signal comprises a physical downlink shared channel (PDSCH).
4. The UE of claim 1 , wherein the signal indicating the Doppler pre-compensation patterns comprises one of a radio resource control (RRC) message or a physical downlink control channel (PDCCH), and
wherein a downlink control information (DCI) received on the PDCCH indicates a time offset between the PDCCH and a physical downlink shared channel (PDSCH).
5. The UE of claim 1 , wherein the signal indicating the Doppler pre-compensation patterns indicates one of absolute Doppler values or a difference between Doppler values.
6. The UE of claim 1 , wherein the first Doppler pre-compensation pattern is applied to a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, and a physical downlink control channel (PDCCH), and
wherein the second Doppler pre-compensation pattern is applied to a physical downlink shared channel (PDSCH).
7. The UE of claim 6 , wherein one or more of the SIBs indicates the second Doppler pre-compensation pattern.
8. A method, comprising:
receiving one or more Doppler pre-compensated control signals generated based on Doppler pre-compensation on control signals using a first of Doppler pre-compensation patterns;
receiving a signal indicating the Doppler pre-compensation patterns;
receiving a Doppler pre-compensated data signal generated based on Doppler pre-compensation on a data signal using a second of the Doppler pre-compensation patterns; and
demodulating and decoding the Doppler pre-compensated data signal based on the Doppler pre-compensation patterns.
9. The method of claim 8 , wherein the control signals are used to access a network in order to receive the data signal.
10. The method of claim 8 , wherein the control signals comprise one or more of a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, or a physical downlink control channel (PDCCH), and
wherein the data signal comprises a physical downlink shared channel (PDSCH).
11. The method of claim 8 , wherein the signal indicating the Doppler pre-compensation patterns comprises one of a radio resource control (RRC) message or a physical downlink control channel (PDCCH), and
wherein a downlink control information (DCI) received on the PDCCH indicates a time offset between the PDCCH and a physical downlink shared channel (PDSCH).
12. The method of claim 8 , wherein the signal indicating the Doppler pre-compensation patterns indicates one of absolute Doppler values or a difference between Doppler values.
13. The method of claim 8 , wherein the first Doppler pre-compensation pattern is applied to a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, and a physical downlink control channel (PDCCH), and
wherein the second Doppler pre-compensation pattern is applied to a physical downlink shared channel (PDSCH).
14. The method of claim 13 , wherein one or more of the SIBs indicates the second Doppler pre-compensation pattern.
15. A base station (BS), comprising:
a processor configured to
generate one or more Doppler pre-compensated control signals by performing Doppler pre-compensation on control signals using a first of Doppler pre-compensation patterns, and
generate a Doppler pre-compensated data signal by performing Doppler pre-compensation on a data signal using a second of the Doppler pre-compensation patterns; and
a transceiver operably coupled to the processor, the transceiver configured to transmit the one or more Doppler pre-compensated control signals and the Doppler pre-compensated data signal.
16. The BS of claim 15 , wherein the transceiver is configured to transmit a signal indicating the Doppler pre-compensation patterns.
17. The BS of claim 15 , wherein the control signals comprise one or more of a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, or a physical downlink control channel (PDCCH), and
wherein the data signal comprises a physical downlink shared channel (PDSCH).
18. The BS of claim 15 , wherein the signal indicating the Doppler pre-compensation patterns comprises one of a radio resource control (RRC) message or a physical downlink control channel (PDCCH), and
wherein the PDCCH indicates a time offset between the PDCCH and a physical downlink shared channel (PDSCH).
19. The BS of claim 15 , wherein the signal indicating the Doppler pre-compensation patterns indicates one of absolute Doppler values or a difference between Doppler values.
20. The BS of claim 15 , wherein the first Doppler pre-compensation pattern is applied to a set of synchronization signals, a set of system information blocks (SIBs), a radio resource control (RRC) message, and a physical downlink control channel (PDCCH),
wherein the second Doppler pre-compensation pattern is applied to a physical downlink shared channel (PDSCH), and
wherein one or more of the SIBs indicates the second Doppler pre-compensation pattern.