METHODS AND APPARATUS FOR SUPPORTING FREQUENCY DIVISION MULTIPLEXING OF MULTIPLE WAVEFORMS

• US 20180288781A1
• Filed: 03/02/2018
• Published: 10/04/2018
• Est. Priority Date: 04/04/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Akkarakaran, Sony, Luo, Tao, Sun, Jing, Malik, Rahul, Kadous, Tamer, Reddy, Akula
• Granted Patent: US 10,548,153 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 1/02 Details
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2614 Peak power aspects
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Aspects of the disclosure relate to methods and apparatus of wireless communication to support frequency division multiplexing (FDM) of multiple waveforms. The methods and apparatus schedule FDM symbols where the scheduling of the FDM symbols is selectively based on one or more waveform parameters during a time interval when the FDM symbols are transmitted. The FDM symbols are then transmitted over the time interval. Further aspects also include the reception of the FDM symbols in a receiver where the waveform parameters are applied for decoding based on the waveform parameters.

Claims

1. A method of wireless communication, comprising:

scheduling frequency division multiplexed (FDM) symbols, wherein the scheduling of the FDM symbols is selectively based on one or more waveform parameters during a time interval when the FDM symbols are transmitted; and

transmitting the FDM symbols over the time interval.

2. The method of claim 1, wherein scheduling the FDM symbols based on the one or more parameters includes restricting a range of possible values of the one or more parameters for the time interval over which FDM transmissions occur.

3. The method of claim 2, further comprising:

restricting a range of possible values of the one or more parameters for a time duration equal to an entire duration of transmission including one or more of a transmission time interval (TTI), a slot, a plurality of slots, a minislot, or a plurality of minislots.

4. The method of claim 2, further comprising:

restricting a range of possible values of the one or more parameters for a time duration equal to at least a portion of a duration of transmission including a portion of an entire transmission time interval (TTI), a portion of a slot, a portion of a plurality of minislots, or a portion of a minislot.

5. The method of claim 4, further comprising:

for a plurality of minislots, determining an alternate minislot partitioning of the plurality into two or more minislot groupings, wherein restricting the range of possible values of the one or more parameters is only performed for minislot groupings where FDM overlapping of symbols occurs.

6. The method of claim 1, wherein the one or more parameters includes one or more of:

(a) a number of waveforms to be frequency division multiplexed;

(b) a rank of one or more waveforms to be frequency division multiplexed;

(c) a modulation order of one or more waveforms to be frequency division multiplexed;

(d) the bandwidth of one or more of the waveforms to be frequency division multiplexed;

(e) frequency separation between at least two of the waveforms to be frequency division multiplexed;

(f) the numerologies of one or more waveforms to be frequency division multiplexed;

(g) the physical channels carried by the waveforms to be frequency division multiplexed;

or

(h) the waveforms to be frequency division multiplexed.

7. The method of claim 1, further comprising:

signaling at least one of a set of possible configurations of overlapping symbols or parameter restriction rules with a Radio Resource Control (RRC).

8. The method of claim 7, the signaling further comprising Downlink Control Information (DCI) including an index indicating at least one out of the set of possible configurations.

9. The method of claim 1, further comprising:

scheduling frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with a physical downlink control channel (PDCCH) during a time duration of the PDCCH occurring prior in time to a later portion of the PDSCH and including restricting a range of possible values of the one or more parameters for the time duration of the PDCCH.

10. The method of claim 1, further comprising:

scheduling frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with one of;

(a) a synchronization signal (SS) block during at least a portion of the time duration of the SS block;

or

(b) a Channel State Information-Reference Signal (CSI-RS) during at least a portion of the time duration of the CSI-RS.

11. An apparatus for wireless communication, comprising:

means for scheduling frequency division multiplexed (FDM) symbols, wherein the means for scheduling is configured to selectively schedule the FDM symbols based on one or more waveform parameters during a time interval when the FDM symbols are transmitted; and

means for transmitting the FDM symbols over the time interval.

12. The apparatus of claim 11, wherein the means for scheduling the FDM symbols further includes means for restricting a range of possible values of the one or more parameters for a time duration over which FDM transmissions occur.

13. The apparatus of claim 12, further comprising:

means for restricting a range of possible values of the one or more parameters for a time duration equal to an entire duration of transmission including one or more of a transmission time interval (TTI), a slot, a plurality of minislots, or a minislot.

14. The apparatus of claim 12, further comprising:

means for restricting a range of possible values of the one or more parameters for a time duration equal to at least a portion of a duration of transmission including a portion of an entire transmission time interval (TTI), a portion of a slot, or a portion of a plurality of minislots.

15. The apparatus of claim 11, wherein the one or more parameters includes one or more of:

(a) a number of waveforms to be frequency division multiplexed;

(b) a rank of at least one waveform to be frequency division multiplexed;

(c) a modulation order of one or more waveforms to be frequency division multiplexed;

(d) the bandwidth of one or more of the waveforms to be frequency division multiplexed;

(e) frequency separation between at least two of the waveforms to be frequency division multiplexed;

(f) the numerologies of one or more waveforms to be frequency division multiplexed;

(g) the physical channels carried by the waveforms to be frequency division multiplexed;

or

(h) the waveforms to be frequency division multiplexed.

16. The apparatus of claim 11, further comprising:

means for scheduling frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with a physical downlink control channel (PDCCH) during a time duration of the PDCCH occurring prior in time to a later portion of the PDSCH and including restricting a range of possible values of the one or more parameters for the time duration of the PDCCH.

17. The apparatus of claim 11, further comprising:

means for scheduling frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with one of;

(a) a synchronization signal (SS) block during at least a portion of the time duration of the SS block;

or

(b) a Channel State Information-Reference Signal (CSI-RS) during at least a portion of the time duration of the CSI-RS.

18. An apparatus for wireless communication, comprising:

a processor;

a transceiver communicatively coupled to the at least one processor; and

a memory communicatively coupled to the at least one processor,

wherein the processor is configured to;

schedule frequency division multiplexed (FDM) symbols, wherein the scheduling of the FDM symbols is selectively based on one or more waveform parameters during a time interval when the FDM symbols are transmitted; and

transmit the FDM symbols over the time interval with the transceiver.

19. The apparatus of claim 18, wherein the processor is further configured to schedule the FDM symbols based on the one or more parameters including restricting a range of possible values of the one or more parameters for the time interval over which FDM transmissions occur.

20. The apparatus of claim 18, wherein the one or more parameters includes one or more of:

(a) a number of waveforms to be frequency division multiplexed;

(b) a rank of one or more waveforms to be frequency division multiplexed;

(c) a modulation order of one or more waveforms to be frequency division multiplexed;

(d) the bandwidth of one or more of the waveforms to be frequency division multiplexed;

(e) frequency separation between at least two of the waveforms to be frequency division multiplexed;

(f) the numerologies of one or more waveforms to be frequency division multiplexed;

(g) the physical channels carried by the waveforms to be frequency division multiplexed;

or

(h) the waveforms to be frequency division multiplexed.

21. The apparatus of claim 18, wherein the processor is further configured to schedule frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with a physical downlink control channel (PDCCH) during a time duration of the PDCCH occurring prior in time to a later portion of the PDSCH and including restricting a range of possible values of the one or more parameters for the time duration of the PDCCH.

22. The apparatus of claim 19, wherein the processor is further configured to schedule frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with one of:

(a) a synchronization signal (SS) block during at least a portion of the time duration of the SS block;

or

(b) a Channel State Information-Reference Signal (CSI-RS) during at least a portion of the time duration of the CSI-RS.

23. A method of wireless communication, comprising:

receiving in a receiver scheduled frequency division multiplexed (FDM) symbols where the FDM symbols are scheduled selectively based on one or more waveform parameters during the time interval when the FDM symbols are transmitted by a transmitter; and

applying the waveform parameters for decoding of FDM symbols in the receiver.

24. The method of claim 23, wherein the FDM symbols are scheduled at the transmitter based on the one or more parameters includes restricting a range of possible values of the one or more parameters for the time interval over which FDM transmissions occur.

25. The method of claim 24, wherein the scheduling of the FDM symbols includes restricting a range of possible values of the one or more parameters for a time duration equal to an entire duration or a portion of a duration of a transmission including one or more of a transmission time interval (TTI), a slot, a plurality of slots, a minislot, a plurality of minislots, or a portion of a minislot.

26. The method of claim 23, wherein the one or more parameters includes one or more of:

(a) a number of waveforms to be frequency division multiplexed;

(b) a rank of one or more waveforms to be frequency division multiplexed;

(c) a modulation order of one or more waveforms to be frequency division multiplexed;

(d) the bandwidth of one or more of the waveforms to be frequency division multiplexed;

(e) frequency separation between at least two of the waveforms to be frequency division multiplexed;

(f) the numerologies of one or more waveforms to be frequency division multiplexed;

(g) the physical channels carried by the waveforms to be frequency division multiplexed;

or

(h) the waveforms to be frequency division multiplexed.

27. The method of claim 23, further comprising:

receiving signaling at the receiver of at least one of a set of possible configurations of overlapping symbols or parameter restriction rules with a Radio Resource Control (RRC).

28. The method of claim 23, wherein the scheduling includes scheduled frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with a physical downlink control channel (PDCCH) during a time duration of the PDCCH occurring prior in time to a later portion of the PDSCH and including restricting a range of possible values of the one or more parameters for the time duration of the PDCCH.

29. The method of claim 23, wherein the scheduling includes scheduling frequency division multiplexing of a portion of a Physical Downlink shared channel (PDSCH) with one of:

(a) a synchronization signal (SS) block during at least a portion of the time duration of the SS block;

or

(b) a Channel State Information-Reference Signal (CSI-RS) during at least a portion of the time duration of the CSI-RS.