Time domain orthogonal cover coding with frequency hopping

Patent metadata

Field	Value
Publication number	US-12537558-B2
Application number	US-202318521637-A
Country	US
Kind code	B2
Filing date	Nov 28, 2023
Priority date	Aug 5, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

Methods, apparatus, and systems that enable Time Domain (TD) Orthogonal Cover Coding (OCC) on non-consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols with frequency hopping are disclosed. In one example aspect, a method for wireless communication includes configuring, by a base station, multiple frequency-domain hops for a communication from a terminal device and receiving, by the base station, the communication from the terminal device. TD-OCC is selectively applied, based on a characteristic of a Demodulation Reference Signal (DMRS), to one or more non-continuous symbols that carry the DMRS in at least one of the multiple frequency-domain hops.

First claim

What is claimed is:

1 . A method for wireless communication, comprising:
configuring, by a base station, multiple frequency-domain hops for a communication from a terminal device, wherein the multiple frequency-domain hops are configured by at least one of intra-slot frequency hopping or inter-slot frequency hopping; and receiving, by the base station, the communication from the terminal device, wherein time-domain orthogonal cover coding (OCC) is selectively applied, based on a characteristic of a Demodulation Reference Signal (DMRS) comprising a number of DMRS symbols per hop, to one or more non-continuous symbols that carry the DMRS in at least one of the multiple frequency-domain hops, wherein, the time-domain OCC is not applied on the hop with a single DMRS symbol, and is applied on a hop with more than one DMRS symbol.

2 . The method of claim 1 , wherein the time-domain OCC is disabled upon the characteristic of the DMRS indicating that the DMRS is carried in a single symbol in each frequency-domain hop or all frequency-domain hops.

3 . The method of claim 1 , wherein the characteristic of the DMRS comprises that the DMRS is carried in at least two symbols in a frequency-domain hop, and wherein the time-domain OCC is applied in the frequency-domain hop in response to the at least two symbols carrying the DMRS in the frequency-domain hop.

4 . The method of claim 1 , wherein the characteristic of the DMRS comprises that the DMRS is carried in a single symbol in each frequency-domain hop, and wherein the time-domain OCC is applied in a slot across at least two of the multiple frequency-domain hops, the method further comprising:
applying frequency-domain OCC to symbols in the slot that carry the DMRS, wherein a length of the frequency-domain OCC is 2 or 4.

5 . The method of claim 1 , wherein the characteristic of the DMRS comprises one or more configuration parameters of the DMRS, the one or more configuration parameters comprising at least one of (1) a duration between a first symbol of a slot that carries the DMRS and a last symbol of the slot that carries the DMRS, (2) a duration of each frequency-domain hop, or (3) a position for additional one or more DMRS symbols.

6 . A method for wireless communication, comprising:
determining, by a terminal device, that multiple frequency-domain hops are configured for a communication to a base station, wherein the multiple frequency-domain hops are configured by at least one of intra-slot frequency hopping or inter-slot frequency hopping; and transmitting, by the terminal device, the communication to the base station, wherein time-domain orthogonal cover coding (OCC) is selectively applied, based on a characteristic of a Demodulation Reference Signal (DMRS) comprising a number of DMRS symbols per hop, to one or more non-continuous symbols that carry the DMRS in at least one of the multiple frequency-domain hops, wherein, the time-domain OCC is not applied on the hop with a single DMRS symbol, and is applied on a hop with more than one DMRS symbol.

7 . The method of claim 6 , wherein the time-domain OCC is disabled upon the characteristic of the DMRS indicating that the DMRS is carried in a single symbol in each frequency-domain hop or all frequency-domain hops.

8 . The method of claim 6 , wherein the characteristic of the DMRS comprises that the DMRS is carried in at least two symbols in a frequency-domain hop, and wherein the time-domain OCC is applied in the frequency-domain hop in response to the at least two symbols carrying the DMRS in the frequency-domain hop.

9 . The method of claim 6 , wherein the characteristic of the DMRS comprises that the DMRS is carried in a single symbol in each frequency-domain hop, and wherein the time-domain OCC is applied in a slot across at least two of the multiple frequency-domain hops, the method further comprising:
applying frequency-domain OCC to symbols in the slot that carry the DMRS, wherein a length of the frequency-domain OCC is 2 or 4.

10 . The method of claim 6 , wherein the characteristic of the DMRS comprises one or more configuration parameters of the DMRS, the one or more configuration parameters comprising at least one of (1) a duration between a first symbol of a slot that carries the DMRS and a last symbol of the slot that carries the DMRS, (2) a duration of each frequency-domain hop, or (3) a position for additional one or more DMRS symbols.

11 . A communication apparatus, comprising at least one processor configured to:
configure multiple frequency-domain hops for a communication from a terminal device, wherein the multiple frequency-domain hops are configured by at least one of intra-slot frequency hopping or inter-slot frequency hopping; and receive the communication from the terminal device, wherein time-domain orthogonal cover coding (OCC) is selectively applied, based on a characteristic of a Demodulation Reference Signal (DMRS) comprising a number of DMRS symbols per hop, to one or more non-continuous symbols that carry the DMRS in at least one of the multiple frequency-domain hop, wherein, the time-domain OCC is not applied on the hop with a single DMRS symbol, and is applied on a hop with more than one DMRS symbol.

12 . The apparatus of claim 11 , wherein the time-domain OCC is disabled upon the characteristic of the DMRS indicating that the DMRS is carried in a single symbol in each frequency-domain hop or all frequency-domain hops.

13 . The apparatus of claim 11 , wherein the characteristic of the DMRS comprises that the DMRS is carried in at least two symbols in a frequency-domain hop, and wherein the time-domain OCC is applied in the frequency-domain hop in response to the at least two symbols carrying the DMRS in the frequency-domain hop.

14 . The apparatus of claim 11 , wherein the characteristic of the DMRS comprises that the DMRS is carried in a single symbol in each frequency-domain hop, and wherein the time-domain OCC is applied in a slot across at least two of the multiple frequency-domain hops, the at least one processor configured to:
apply frequency-domain OCC to symbols in the slot that carry the DMRS, wherein a length of the frequency-domain OCC is 2 or 4.

15 . The apparatus of claim 11 , wherein the characteristic of the DMRS comprises one or more configuration parameters of the DMRS, the one or more configuration parameters comprising at least one of (1) a duration between a first symbol of a slot that carries the DMRS and a last symbol of the slot that carries the DMRS, (2) a duration of each frequency-domain hop, or (3) a position for additional one or more DMRS symbols.

16 . A communication apparatus, comprising at least one processor configured to:
determine that multiple frequency-domain hops are configured for a communication to a base station, wherein the multiple frequency-domain hops are configured by at least one of intra-slot frequency hopping or inter-slot frequency hopping; and transmit the communication to the base station, wherein time-domain orthogonal cover coding (OCC) is selectively applied, based on a characteristic of a Demodulation Reference Signal (DMRS) comprising a number of DMRS symbols per hop, to one or more non-continuous symbols that carry the DMRS in at least one of the multiple frequency-domain hops, wherein, the time-domain OCC is not applied on the hop with a single DMRS symbol, and is applied on a hop with more than one DMRS symbol.

17 . The apparatus of claim 16 , wherein the time-domain OCC is disabled upon the characteristic of the DMRS indicating that the DMRS is carried in

Assignees

• Zte Corp

Inventors

• Mei Meng
• Gao Bo
• Zhang Shujuan
• Yao Ke
• Zhang Yang

Classifications

• H04L27/2613

  Structure of the reference signals · CPC title

• H04L27/26035

  Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences (using different training sequence per antenna H04B7/0684; code allocation H04J13/16) · CPC title

• H04B1/713 Primary

  using frequency hopping · CPC title

• H04L5/0016

  Time-frequency-code · CPC title

• H04L5/0012

  Hopping in multicarrier systems · CPC title