US 12,301,518 B2Granted

Demodulation reference signal indicating and receiving methods, transmit end, and receive end

AssigneeHuawei Technologies Co., Ltd.

InventorsXiang Ren, Yong Liu, Lu Rong

Life of this patent

Estimating the term…

Loading patent…

Abstract

This application discloses a DMRS indicating method, a DMRS receiving method, and an apparatus. The method includes: determining, by a transmit end from a plurality of groups of demodulation reference signal DMRS configuration information, DMRS configuration information corresponding to a current DMRS transmission scheme, and obtaining DMRS indication information based on the DMRS configuration information, where each group of DMRS configuration information includes a plurality of pieces of DMRS configuration information; and sending, by the transmit end, the DMRS indication information. The method and the apparatus provided in this application are implemented to match a plurality of scenarios in NR. This can satisfy a requirement for transmitting more layers of data, and can further reduce indication overheads.

Claims12

Dependent claims

A demodulation reference signal (DMRS) indicating method comprising:

obtaining, by a transmit end, DMRS indication information based on DMRS configuration information, wherein the DMRS indication information indicates code division multiplexing (CDM) group information of an antenna port, and wherein the CDM group information comprises a number of CDM groups;
and
sending, by the transmit end, the DMRS indication information;
wherein frequency division multiplexing (FDM) is performed, for a 2-symbol DMRS type 2 and in accordance with single-user (SU) scheduling being performed by using the DMRS configuration information, in a CDM group 1 and a CDM group 2;
wherein in the DMRS configuration information, specific DMRS port mapping rules of a DMRS type 2 are applied as follows:
ports comprised in the CDM group 1 are {0, 1, 6, 7},
ports comprised in the CDM group 2 are {2, 3, 8, 9}, and
ports comprised in a CDM group 3 are {4, 5, 10, 11};
and
wherein the frequency division multiplexing (FDM) is performed in the CDM group 1 and the CDM group 2 as follows:
in accordance with a value of the number of CDM groups being 2 and six transmission layers or six DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, and 6 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, and 8 are scheduled;
or
in accordance with a value of the number of CDM groups being 2 and eight transmission layers or eight DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, 6, and 7 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, 8, and 9 are scheduled.

16 more elements

A demodulation reference signal (DMRS) receiving method, comprising:

receiving, by a receive end, DMRS indication information sent by a transmit end, wherein the DMRS indication information indicates code division multiplexing (CDM) group information of an antenna port, and wherein the CDM group information comprises a number of CDM groups;
and
assisting, by the receive end, in demodulating data based on the received DMRS indication information,
wherein frequency division multiplexing (FDM) is performed, for a 2-symbol DMRS type 2 and in accordance with single-(SU) scheduling being performed by using the DMRS configuration information, in a CDM group 1 and a CDM group 2;
wherein in the DMRS configuration information, specific DMRS port mapping rules of a DMRS type 2 are applied as follows:
ports comprised in the CDM group 1 are {0, 1, 6, 7},
ports comprised in the CDM group 2 are {2, 3, 8, 9}, and
ports comprised in a CDM group 3 are {4, 5, 10, 11};
and
wherein the frequency division multiplexing (FDM) is performed in the CDM group 1 and the CDM group 2, as follows:
in accordance with a value of the number of CDM groups being 2 and six transmission layers or six DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, and 6 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, and 8 are scheduled;
or
in accordance with a value of the number of CDM groups being 2 and eight transmission layers or eight DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, 6, and 7 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, 8, and 9 are scheduled.

16 more elements

A transmit end, comprising:

a processor;
and
a non-transitory computer-readable medium including computer-executable instructions that, when executed by the processor, facilitate performing a demodulation reference signal (DMRS) indicating method comprising:
obtaining DMRS indication information based on DMRS configuration information, wherein the DMRS indication information indicates code division multiplexing (CDM) group information of an antenna port, and wherein the CDM group information comprises a number of CDM groups;
and
sending the DMRS indication information;
wherein in the DMRS configuration information, specific DMRS port mapping rules of a DMRS type 2 are applied as follows:
ports comprised in a CDM group 1 are {0, 1, 6, 7},
ports comprised in a CDM group 2 are {2, 3, 8, 9}, and
ports comprised in a CDM group 3 are {4, 5, 10, 11};
wherein frequency division multiplexing (FDM) is performed, for a 2-symbol DMRS type 2 and in accordance with single-user (SU) scheduling being performed by using the DMRS configuration information, in the CDM group 1 and the CDM group 2;
wherein the frequency division multiplexing (FDM) is performed in the CDM group 1 and the CDM group 2, as follows:
in accordance with a value of the number of CDM groups being 2 and six transmission layers or six DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, and 6 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, and 8 are scheduled;
or
in accordance with a value of the number of CDM groups being 2 and eight transmission layers or eight DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, 6, and 7 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, 8, and 9 are scheduled.

18 more elements

A receive end, comprising:

a processor;
and
a non-transitory computer-readable medium including computer-executable instructions that, when executed by the processor, facilitate performing a demodulation reference signal (DMRS) receiving method comprising:
receiving DMRS indication information sent by a transmit end, wherein the DMRS indication information indicates code division multiplexing (CDM) group information of an antenna port, and wherein the CDM group information comprises a number of CDM groups;
and
assisting in demodulating data based on the DMRS indication information,
wherein frequency division multiplexing (FDM) is performed, for a 2-symbol DMRS type 2 and in accordance with single-user (SU) scheduling being performed by using the DMRS configuration information, in a CDM group 1 and a CDM group 2;
wherein in the DMRS configuration information, specific DMRS port mapping rules of a DMRS type 2 are applied as follows:
ports comprised in the CDM group 1 are {0, 1, 6, 7},
ports comprised in the CDM group 2 are {2, 3, 8, 9}, and
ports comprised in a CDM group 3 are {4, 5, 10, 11};
and
wherein the frequency division multiplexing (FDM) is performed in the CDM group 1 and the CDM group 2, as follows:
in accordance with a value of the number of CDM groups being 2 and six transmission layers or six DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, and 6 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, and 8 are scheduled;
or
in accordance with a value of the number of CDM groups being 2 and eight transmission layers or eight DMRS ports being scheduled, FDM multiplexing is performed as follows:
in DMRS ports 0, 1, 6, and 7 corresponding to the CDM group 1, the DMRS ports 0, 1, 6, and 7 are scheduled;
and
in DMRS ports 2, 3, 8, and 9 corresponding to the CDM group 2, the DMRS ports 2, 3, 8, and 9 are scheduled.

19 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/876,301Filed 28 Jul 2022 · continuation
Priority: CN 201710686645.911 Aug 2017
Published: US 2023/0030162 A12 Feb 2023
Granted: 13 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04L 5/10
The signals being represented by different frequencies: with dynamo-electric generation of carriers; with mechanical filters or demodulators
H04L 27/261
Signal structure: details of reference signals
H04L 5/0021
Time-frequency-code: in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal

Family

PCT/CN2018/096201Parent of this continuation · filed 19 Jul 2018
Application16/517,198Parent of this continuation · filed 19 Jul 2019
Application16/917,139Parent of this continuation · filed 30 Jun 2020
US 10,715,300 B2Parent of this continuation · filed 14 Jul 2020
US 2023/0030162 A1Pre-grant publication · published 2 Feb 2023
US 11,424,898 B2Parent of this continuation
US 2019/0342062 A1Published application
US 2020/0336275 A1Published application
US 12,301,518 B2This patent

From the US filing history. Foreign family members aren’t listed.