SEQUENCE GENERATION FOR SYSTEMS SUPPORTING MIXED NUMEROLOGIES

• US 20180131493A1
• Filed: 09/22/2017
• Published: 05/10/2018
• Est. Priority Date: 11/10/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: LUO, Tao, JOHN WILSON, Makesh Pravin, NAGARAJA, Sumeeth, AKKARAKARAN, Sony
• Granted Patent: US 11,283,575 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 49/552 by ensuring the integrity of packets received through redundant connections
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

Networks that support 5G communication may support different numerologies across and even within a symbol, slot, or subframe. Sequences, such as reference signals or data scrambled with a scrambling code, may be transmitted on resources with such mixed numerologies. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment. The UE may be configured to receive an indication of assigned resources for communicating with a base station. The UE may also be configured to determine a numerology associated with the assigned resources, and to determine one or more indices based on the numerology. The UE may also generate a sequence based on the one or more indices and communicate with the base station based on the sequence.

Claims

1. A method of wireless communication by a user equipment (UE), comprising:

receiving an indication of assigned resources for communicating with a base station;

determining a numerology comprising at least one of a subcarrier spacing or a symbol duration associated with the assigned resources;

determining one or more indices for the assigned resources based on the numerology;

generating a sequence based on the one or more indices; and

communicating with the base station based on the sequence.

2. The method of claim 1, wherein the indication comprises a downlink assignment and wherein communicating with the base station comprises receiving a downlink transmission based on the downlink assignment and performing at least one of channel estimation based on the sequence or decoding scrambled data received in the downlink transmission based on the sequence.

3. The method of claim 1, wherein the indication comprises an uplink grant and wherein communicating with the base station comprises at least one of transmitting a reference signal in an uplink transmission or scrambling data for the uplink transmission based on the sequence, the uplink transmission being based on the uplink grant.

4. The method of claim 1, further comprising receiving information indicating the numerology from the base station, wherein the information is received in a master information block (MIB), a system information block (SIB), or in radio resource control (RRC) signaling.

5. The method of claim 1, wherein determining the numerology comprises determining a first numerology associated with first assigned resources and determining a second numerology associated with second assigned resources, and wherein the first and second numerologies are different.

6. The method of claim 1, wherein determining the numerology comprises determining a plurality of reference numerologies for the assigned resources, and wherein determining the one or more indices comprises comparing portions of the assigned resources to corresponding reference numerologies in the plurality of numerologies.

7. The method of claim 1, wherein determining the one or more indices for the assigned resources comprises one or more of:

determining a resource block (RB) index by matching a first RB location of a first RB associated with the assigned resources with a second RB location of a corresponding reference numerology, wherein the RB index is based on the second RB location within the corresponding reference numerology;

determining a symbol index by matching a first symbol location of a first symbol associated with the assigned resources with a second symbol location of a corresponding reference numerology, wherein the symbol index is based on the second symbol location within the corresponding reference numerology;

or

determining a frequency subcarrier index by matching a first frequency subcarrier location associated with the assigned resources with a second frequency subcarrier location in a corresponding reference numerology, wherein the frequency subcarrier index is based on the second frequency subcarrier location within the corresponding reference numerology.

8. The method of claim 1, wherein determining the one or more indices for the assigned resources comprises comparing the assigned resources with an indexed time-frequency grid having a reference numerology and choosing a closest match.

9. The method of claim 1, wherein the determining the numerology comprises determining a subcarrier spacing and symbol duration associated with one of a plurality of uplink (UL) resources or downlink (DL) resources in the assigned resources, wherein the one of the plurality of UL resources or DL resources comprises at least two different subcarrier spacings or symbol durations.

10. A user equipment (UE) for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to cause the UE to;

receive an indication of assigned resources for communicating with a base station;

determine a numerology comprising at least one of a subcarrier spacing or a symbol duration associated with the assigned resources;

determine one or more indices for the assigned resources based on the numerology;

generate a sequence based on the one or more indices; and

communicate with the base station based on the sequence.

11. The UE of claim 10, wherein the indication comprises a downlink assignment and wherein communicating with the base station comprises receiving a downlink transmission based on the downlink assignment and performing at least one of channel estimation based on the sequence or decoding scrambled data received in the downlink transmission based on the sequence.

12. The UE of claim 10, wherein the indication comprises an uplink grant and wherein communicating with the base station comprises at least one of transmitting a reference signal in an uplink transmission or scrambling data for the uplink transmission based on the sequence, the uplink transmission being based on the uplink grant.

13. The UE of claim 10, wherein the at least one processor is further configured to cause the UE to receive information indicating the numerology from the base station, wherein the information is received in a master information block (MIB), a system information block (SIB), or in radio resource control (RRC) signaling.

14. The UE of claim 10, wherein determining the numerology comprises determining a first numerology associated with first assigned resources and determining a second numerology associated with second assigned resources, and wherein the first and second numerologies are different.

15. The UE of claim 10, wherein determining the numerology comprises determining plurality of reference numerologies for the assigned resources, and wherein determining the one or more indices comprises comparing portions of the assigned resources to corresponding reference numerologies in the plurality of numerologies.

16. The UE of claim 10, wherein the determining the one or more indices for the assigned resources comprises one or more of:

determining a resource block (RB) index by matching a first RB location of a first RB associated with the assigned resources with a second RB location of a corresponding reference numerology, wherein the RB index is based on the second RB location within the corresponding reference numerology;

determining a symbol index by matching a first symbol location of a first symbol associated with the assigned resources with a second symbol location in a corresponding reference numerology, wherein the symbol index is based on the second symbol location within the corresponding reference numerology;

or

determining a frequency subcarrier index by matching a first frequency subcarrier location associated with the assigned resources with a second frequency subcarrier location in a corresponding reference numerology, wherein the frequency subcarrier index is based on the second frequency subcarrier location within the corresponding reference numerology.

17. The UE of claim 10, wherein determining the one or more indices for the assigned resources comprises comparing the assigned resources with an indexed time-frequency grid having a reference numerology and choosing a closest match.

18. The UE of claim 10, wherein the determining the numerology comprises determining a subcarrier spacing and symbol duration associated with one of a plurality of a uplink (UL) resources or downlink (DL) resource in the assigned resources, wherein the one of the plurality of UL resources or DL resources comprises at least two different subcarrier spacings or symbol durations.

19. A user equipment (UE), comprising:

means for receiving an indication of assigned resources for communicating with a base station;

means for determining a numerology comprising at least one of a subcarrier spacing or a symbol duration associated with the assigned resources;

means for determining one or more indices for the assigned resources based on the numerology;

means for generating a sequence based on the one or more indices; and

means for communicating with the base station based on the sequence.

20. The UE of claim 19, wherein the indication comprises a downlink assignment and wherein communicating with the base station comprises receiving a downlink transmission based on the downlink assignment and performing at least one of channel estimation based on the sequence or decoding scrambled data received in the downlink transmission based on the sequence.

21. The UE of claim 19, wherein the indication comprises an uplink grant and wherein communicating with the base station comprises at least one of transmitting a reference signal in an uplink transmission or scrambling data for the uplink transmission based on the sequence, the uplink transmission being based on the uplink grant.

22. The UE of claim 19, further comprising means for receiving information indicating the numerology from the base station, wherein the information is received in a master information block (MIB), a system information block (SIB), or in radio resource control (RRC) signaling.

23. The UE of claim 19, wherein determining the numerology comprises determining a first numerology associated with first assigned resources and determining a second numerology associated with second assigned resources, and wherein the first and second numerologies are different.

24. The UE of claim 19, wherein determining the numerology comprises determining plurality of reference numerologies for the assigned resources, and wherein determining the one or more indices comprises comparing portions of the assigned resources to corresponding reference numerologies in the plurality of numerologies.

25. The UE of claim 19, wherein the means for determining the one or more indices for the assigned resources is configured to:

determine an RB index by matching a first RB location of a first RB associated with the assigned resources with a second RB location of a corresponding reference numerology, wherein the RB index is based on the second RB location within the corresponding reference numerology;

determine a symbol index by matching a first symbol location of a first symbol associated with the assigned resources with a second symbol location in a corresponding reference numerology, wherein the symbol index is based on the second symbol location within the corresponding reference numerology;

or

determine a frequency subcarrier index by matching a first frequency subcarrier location associated with the assigned resources with a second frequency subcarrier location in a corresponding reference numerology, wherein the frequency subcarrier index is based on the second frequency subcarrier location within the corresponding reference numerology.

26. The UE of claim 19, wherein determining the one or more indices for the assigned resources comprises comparing the assigned resources with an indexed time-frequency grid having a reference numerology and choosing a closest match.

27. The UE of claim 19, wherein the determining the numerology comprises determining a subcarrier spacing and symbol duration associated with one of a plurality of a uplink (UL) resources or downlink (DL) resources in the assigned resources, wherein the one of the plurality of UL resources or DL resources comprises at least two different subcarrier spacings or symbol durations.

28. A base station for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to cause the base station to;

determine a numerology associated with a resource,

assign the resource for use by a user equipment,

signal the numerology comprising at least one of a subcarrier spacing or a symbol duration associated with the resource, wherein the numerology is signaled in at least one of a master information block (MIB), a system information block (SIB), or radio resource control (RRC) signaling, and

communicate with the user equipment over the assigned resource based on the numerology.

29. The base station of claim 28, wherein the at least one processor is configured to determine a first numerology for a first portion of the resource and a second numerology for a second portion of the resource and wherein signaling the numerology comprises signaling the first numerology and signaling the second numerology.

30. The base station of claim 28, wherein the determining the numerology associated with the resource comprises determining a subcarrier spacing and symbol duration associated with one of a plurality of uplink (UL) resources or downlink (DL) resources, wherein the one of the plurality of UL resources or DL resources comprises at least two different subcarrier spacings or symbol durations.