WO2021121177A1 - Dmrs port indication method and device - Google Patents

Abstract

Embodiments of the present invention provide a DMRS port indication method and device. The method comprises: before RRC signaling is received, receiving first information, the first information indicating a DMRS port of the terminal.

Description

Method and equipment for DMRS port indication

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201911320995.9 filed in China on December 19, 2019, the entire content of which is incorporated herein by reference.

Technical field

The embodiment of the present invention relates to the field of communication technology, and in particular to a method and device for port indication of a demodulation reference signal (Demodulation Reference Signal, DMRS).

Background technique

At present, the existing protocol stipulates that the terminal (for example, user equipment (UE)) does not expect to receive the downlink control information (Downlink Control Information, DCI) format (format) before obtaining the radio resource control (Radio Resource Control, RRC) configuration. -1. The antenna port (antenna ports) (ie, DMRS port) field included in the DCI format 0-1 is based on whether the transmission precoding (transform precoder) indicated in the high-level configuration parameters is enabled (enable/disable), and the dmrs-Type is Type (1/2), the maximum length (maxLength) value (1/2), and when sending configuration parameters (Txconfig) = non-codebook (nonCodebook), according to the channel sounding reference signal in the DCI domain (Sounding Reference) Signal, SRS) the number of ranks determined by the resource flag, or when Txconfig=codebook (codebook), the antenna is determined according to the precoding information in the DCI domain and the number of layers (Precodering Information and Number of Layers). In the port table, the specific DMRS port is determined according to the bit indication of the antenna ports.

For DCI format 0-0, there is no corresponding field to indicate the DMRS port. At this time, the DMRS port 0 (port 0) used by the UE, and the DMRS is a single symbol front-loaded type 1 (single symbol front-loaded DM- RS of configuration type 1).

In the case of using DCI format 0-0 to schedule uplink data, the UE can only use a single port (DMRS port 0) for data transmission by default, and a single port (DMRS port 0) cannot support the UE for uplink multi-user (Multi-User, MU) transmission.

Summary of the invention

An object of the embodiments of the present invention is to provide a method and device for DMRS port indication, to solve the problem that when only DCI format 0-0 scheduling data is supported, the terminal can only use a single port for data transmission by default.

In the first aspect, an embodiment of the present invention provides a DMRS port indication method, which is applied to a terminal, and includes:

Before receiving the radio resource control RRC signaling, receive first information, where the first information indicates the DMRS port of the terminal.

In the second aspect, an embodiment of the present invention provides a DMRS port indication method, which is applied to a network device, and includes:

Before sending the RRC signaling, send first information, where the first information indicates the DMRS port of the terminal.

In a third aspect, an embodiment of the present invention provides a terminal, including:

The first receiving module is configured to receive first information before receiving radio resource control RRC signaling, where the first information indicates the DMRS port of the terminal.

In a fourth aspect, an embodiment of the present invention provides a network device, including:

The first sending module is configured to send first information before sending RRC signaling, where the first information indicates the DMRS port of the terminal.

In a fifth aspect, an embodiment of the present invention provides a communication device, including: a processor, a memory, and a program stored on the memory and running on the processor, which is implemented when the program is executed by the processor It includes the steps of the DMRS port indication method as described in the first aspect or the second aspect.

In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium with a computer program stored on the computer-readable storage medium. When the computer program is executed by a processor, the implementation includes as described in the first aspect or the second aspect. The steps of the DMRS port indication method described above.

In the embodiment of the present invention, before receiving RRC signaling (for example, when only DCI format 0-0 scheduling data is supported), the network can designate the DMRS port to realize multi-stream transmission and/or multi-user transmission.

Description of the drawings

By reading the detailed description of the embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only used for the purpose of illustrating the preferred embodiments, and are not considered as a limitation to the present invention. Also, throughout the drawings, the same reference symbols are used to denote the same components. In the attached picture:

Figure 1 is a schematic diagram of the architecture of a wireless communication system according to an embodiment of the present invention;

FIG. 2 is one of the flowcharts of the DMRS port indication method according to the embodiment of the present invention;

FIG. 3 is the second flowchart of the method for DMRS port indication according to an embodiment of the present invention;

Figure 4 is a schematic diagram of a terminal according to an embodiment of the present invention;

Figure 5 is a schematic diagram of a network device according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a communication device according to an embodiment of the present invention.

Detailed ways

In order to facilitate the understanding of the embodiments of the present invention, the following technical points are introduced below:

1. Domains included in DCI 0-0 and 0-1:

1. The cell radio network temporary identification (Cell RNTI, C-RNTI) or the configuration scheduling RNTI (Configured Scheduling RNTI, CS-RNTI) or modulation coding strategy cell radio network temporary identification (Modulation Coding Scheme Cell RNTI, MCS-C-RNTI) ) DCI format of scrambled cyclic redundancy check (Cyclic redundancy check, CRC) 0-0 (DCI format 0-0 with CRC scrambled by C-RNTI/CS-RNTI/MCS-C-RNTI):

(1) Identifier for DCI format, 1bit, fixed to 0, indicating uplink

(2) Frequency domain resource assignment (frequency domain resource assignment);

(3) Time domain resource assignment;

(4) Frequency hopping flag;

(5) Modulation and coding scheme;

(6) New data indicator;

(7) Redundancy version;

(8) HARQ process number (HARQ process number);

(9) TPC command for scheduled PUSCH (TPC command for scheduled PUSCH);

(10) Padding bits;

(11) Uplink or supplementary uplink indicator (UL/SUL indicator).

2. The DCI format of the CRC scrambled by the temporary cell radio network identity (Temporary Cell Radio Network Identity, TC-RNTI) 0-0 (DCI format 0-0 with CRC scrambled by TC-RNTI (temporary C-RNTI) ):

(1)identifier for DCI format;

(2) frequency domain resource assignment;

(3) time domain resource assignment;

(4) frequency hopping flag;

(5) Modulation and coding scheme;

(6) new data indicator;

(7) Redundancy version;

(8) HARQ process number;

(9) TPC command for scheduled PUSCH;

(10) Padding bits.

3. The DCI format of CRC scrambled by C-RNTI or CS-RNTI or semi-persistent CSI RNTI (Semi-Persistent CSI RNTI, SP-CSI-RNTI) or MCS-C-RNTI format 0-0(DCI format 0_1 with CRC scrambled by C-RNTI or CS-RNTI or SP-CSI-RNTI or MCS-C-RNTI):

(1)identifier for DCI format;

(2) Carrier indicator;

(3) UL/SUL indicator;

(4) Bandwidth part indicator (BWP indicator);

(5) frequency domain resource assignment;

(6) time domain resource assignment;

(7) Frequency hopping flag;

(8) Modulation and coding scheme;

(9) new data indicator;

(10) Redundancy version;

(11) HARQ process number;

(12) The first downlink assignment index (1st downlink assignment index);

(13) The second downlink assignment index (2nd downlink assignment index);

(14) TPC command for scheduled PUSCH;

(15) SRS resource indicator (SRS resource indicator);

(16) Precoding information and number of layers;

(17) Antenna ports (DMRS port);

(18) SRS request (SRS request);

(19) Channel state information request (CSI request);

(20) CBG transmission information (CBG transmission information);

(21) Phase tracking reference signal (PTRS)-DMRS association (association);

(22) Offset (beta_offset);

(23) DMRS sequence initialization (DMRS sequence initialization);

(24) Uplink channel indicator (UL-SCH indicator);

(25) Padding bits.

2. About the antenna port table (see Table 1～Table 18):

(1) The antenna port table parameters include: transmission precoding is enabled (transform precoder is enabled), DMRS type (dmrs-Type)=1, and maximum (maxLength)=1.

Table 1:

(2) The antenna port table parameters include: transform precoder is enabled, dmrs-Type=1, maxLength=2.

Table 2:

(3) The antenna port table parameters include: transmission precoding is disabled (transform precoder is disabled), dmrs-Type=1, maxLength=1, rank=1.

table 3:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	1	0
1	1	1
2	2	0
3	2	1
4	2	2
5	2	3
6-7	Reserved	Reserved

(4) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=2.

Table 4:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	1	0, 1
1	2	0, 1
2	2	2, 3
3	2	0, 2
4-7	Reserved	Reserved

(5) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=3.

table 5:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	2	0-2
2-7	Reserved	Reserved

(6) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=4.

Table 6:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	2	0-3
2-7	Reserved	Reserved

(7) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=1.

Table 7:

(8) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=2.

Table 8:

(9) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=3.

Table 9:

(10) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=4.

Table 10:

(11) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=1.

Table 11:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	1	0
1	1	1
2	2	0
3	2	1
4	2	2
5	2	3
6	3	0
7	3	1
8	3	2
9	3	3
10	3	4
11	3	5
12-15	Reserved	Reserved

(12) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=2.

Table 12:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	1	0, 1
1	2	0, 1
2	2	2, 3
3	3	0, 1
4	3	2, 3
5	3	4, 5
6	2	0, 2
7-15	Reserved	Reserved

(13) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=3.

Table 13:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	2	0-2
1	3	0-2
2	3	3-5
3-15	Reserved	Reserved

(14) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=4.

Table 14:

Value	Number of DMRS CDM group(s) without data	DMRS port(s)
0	2	0-3
1	3	0-3
2-15	Reserved	Reserved

(15) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=1.

Table 15:

(16) Antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=2.

Table 16:

(17) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=3.

Table 17:

(18) The antenna port table parameters include: transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=4.

Table 18:

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The term "including" in the specification and claims of this application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to clear Instead, those steps or units listed below may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment. In addition, the use of "and/or" in the specification and claims means at least one of the connected objects, such as A and/or B, which means that A and B alone are included, and there are three cases for both A and B.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present related concepts in a specific manner.

The technology described in this article is not limited to Long Time Evolution (LTE)/LTE-Advanced (LTE-A) systems, and can also be used in various wireless communication systems, such as Code Division Multiple Access (Code Division). Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems.

The terms "system" and "network" are often used interchangeably. The CDMA system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants. The TDMA system can implement radio technologies such as the Global System for Mobile Communication (GSM). OFDMA system can realize such as Ultra Mobile Broadband (UMB), Evolved UTRA (Evolution-UTRA, E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. Radio technology. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and more advanced LTE (such as LTE-A) are new UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described in this article can be used for the systems and radio technologies mentioned above, as well as other systems and radio technologies.

The embodiments of the present invention will be described below in conjunction with the drawings. The method and device for DMRS port indication provided in the embodiment of the present invention can be applied to a wireless communication system. Referring to FIG. 1, it is a schematic diagram of the architecture of a wireless communication system according to an embodiment of the present invention. As shown in FIG. 1, the wireless communication system may include: a network device 11 and a terminal 12. The terminal 12 may be denoted as a UE 12, and the terminal 12 may communicate with the network device 11 (transmit signaling or data). In practical applications, the connection between the above-mentioned various devices may be a wireless connection. In order to conveniently and intuitively indicate the connection relationship between the various devices, a solid line is used in FIG.

The network device 11 provided in the embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node base station (eNB), or a network device in a 5G system (for example, the following Equipment such as next generation node base station (gNB) or transmission and reception point (TRP)).

The terminal 12 provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), a mobile Internet device (Mobile Internet Device (MID), Wearable Device (Wearable Device), or in-vehicle equipment, etc.

Referring to FIG. 2, an embodiment of the present invention provides a method for DMRS port indication. The method may be executed by a terminal, and includes: step 201.

Step 201: Before receiving radio resource control RRC signaling, receive first information, where the first information indicates the DMRS port of the terminal.

For example, the first information indicates a DMRS port for the terminal to perform uplink multi-user transmission or single-user transmission.

In some embodiments, the RRC signaling includes an information element (IE) indicating antenna port table parameters.

In some implementation manners, the step of receiving the RRC signaling includes at least one of the following:

(1) Before the RRC connection is established;

(2) After changing from idle state to connected state, before receiving RRC reconfiguration for the first time;

(3) After changing from the inactive state to the connected state, before receiving the RRC reconfiguration for the first time.

In some embodiments, step 201 may be implemented in the following manner: receiving a DCI in a first DCI format, where the first format indicates the DMRS port of the terminal.

Optionally, the first DCI format includes one or more of the following:

(1) All or part of the domains in DCI format 0-0;

(2) Antenna port (Antenna) field, where the antenna port field indicates the DMRS port index value of the terminal;

(3) Repetition field, the Repetition field indicates the antenna port table parameter number and/or the antenna port table number, further, the antenna port table parameter number corresponds to the antenna port table number one to one;

(4) Other domains.

Optionally, other fields indicate antenna port table parameter numbers and/or antenna port table numbers.

The above-mentioned other domains refer to domains other than at least part of the domain, antenna port domain, and repetition domain in DCI format 0-0. Further, the other domains can be set to default values, or at least part of the other domains can be set Into the default value.

In some embodiments, the first DCI format includes at least all fields in DCI format 0-0.

Exemplarily, the domain in DCI format 0-0 may include one or more of the following (1) to (11):

(1) Identifier for DCI format (identifier for DCI format);

(2) Frequency domain resource assignment (frequency domain resource assignment);

(3) Time domain resource assignment;

(4) Frequency hopping flag;

(5) Modulation and coding scheme;

(6) New data indicator;

(7) Redundancy version;

(8) HARQ process number (HARQ process number);

(9) TPC command for scheduled PUSCH (TPC command for scheduled PUSCH);

(10) Padding bits;

(11) Uplink or supplementary uplink indicator (UL/SUL indicator).

It is understandable that the indication manner of the domains where the first DCI format is the same as the DCI format 0-0 follows the first DCI format, and the terminal demodulates the corresponding DCI according to the first DCI format.

Optionally, the antenna port table parameters may include any of the following (1) to (18):

(1) transform precoder=enable, dmrs-Type=1, maxLength=1 (corresponding to Table 1 in the above antenna port table);

(2) transform precoder=enable, dmrs-Type=1, maxLength=2 (corresponding to Table 2 in the above antenna port table);

(3) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=1 (corresponding to Table 3 in the above antenna port table);

(4) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=2 (corresponding to Table 4 in the above antenna port table);

(5) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=3 (corresponding to Table 5 in the above antenna port table);

(6) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=4 (corresponding to Table 6 in the above antenna port table);

(7) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=1 (corresponding to Table 7 in the above antenna port table);

(8) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=2 (corresponding to Table 8 in the above antenna port table);

(9) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=3 (corresponding to Table 9 in the above antenna port table);

(10) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=4 (corresponding to Table 10 in the above antenna port table);

(11) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=1 (corresponding to Table 11 in the above antenna port table);

(12) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=2 (corresponding to Table 12 in the above antenna port table);

(13) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=3 (corresponding to Table 13 in the above antenna port table);

(14) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=4 (corresponding to Table 14 in the above antenna port table);

(15) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=1 (corresponding to Table 15 in the above antenna port table);

(16) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=2 (corresponding to Table 16 in the above antenna port table);

(17) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=3 (corresponding to Table 17 in the above antenna port table);

(18) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=4 (corresponding to Table 18 in the above antenna port table).

In the embodiment of the present invention, the antenna port table parameter numbers can be represented by the above (1) to (18), and the antenna port table numbers can be represented by the above tables 1 to 18, but of course it is not limited thereto.

It can be understood that the antenna port table includes but is not limited to the above-mentioned Table 1 to Table 18, or it may be a new antenna port table agreed by the protocol. In this embodiment, the parameters in the new antenna port table are not Make specific restrictions.

In other implementation manners, step 201 can be implemented in the following manner:

A message 4 (Msg4) is received, where the Msg4 indicates the index value of the DMRS port of the terminal.

It is understandable that the above-mentioned Msg4 is the Msg4 sent by the base station to the terminal before the RRC connection is established, and the Msg4 carries a contention resolution identification (ID).

In the embodiment of the present invention, the above-mentioned first DCI format may be any one of:

(1) DCI format 0-1;

(2) DCI format 0-2, mainly used for ultra-reliable and low latency communications (Ultra-Reliable and Low Latency Communications, URLLC) transmission, but the protocol is not restricted, which is equivalent to the simplified version of DCI format 0-1;

(3) Newly defined DCI format, for example: newly defined DCI format 0-0x. It is understandable that there is no limitation on the form of newly defined DCI format.

Further, the first DCI format has a fixed bit overhead, for example: 1 bit or 2 bits.

In some implementation manners, the method further includes: if the beam information after beam training is not obtained, transmitting through the monitored synchronization signal block (Synchronization Signal and PBCH block, SSB) beam.

For example, through the monitored SSB beam, receive the physical downlink control channel (Physical Downlink Control Channel, PDCCH) carrying the first information (for example, the DCI of the first DCI format); or send the physical uplink shared channel scheduled by the first information ( Physical Uplink Shared Channel, PUSCH).

In some embodiments, before step 201, the DCI of the second DCI format is received, and the second DCI format is DCI format 0-0, that is, the network side can use DCI format 0-0 for scheduling first, and then pass the first DCI format. Information scheduling.

In the embodiment of the present invention, before receiving RRC signaling (for example, when only DCI format 0-0 scheduling data is supported), the network can designate the DMRS port to realize multi-stream transmission and/or multi-user transmission.

Referring to FIG. 3, an embodiment of the present invention also provides a method for DMRS port indication. The method is executed by a network device and includes: step 301.

Step 301: Before sending the RRC signaling, send first information, where the first information indicates the DMRS port of the terminal.

In some implementation manners, the sending of RRC signaling includes at least one of the following:

Before the RRC connection is established;

After changing from idle state to connected state, before sending RRC reconfiguration for the first time;

After changing from the inactive state to the connected state, before sending the RRC reconfiguration for the first time.

In some embodiments, step 301 may be implemented in the following manner: sending a DCI of a first DCI format, where the first DCI format indicates the DMRS port of the terminal.

Optionally, the first DCI format includes one or more of the following:

(1) All or part of the domains in DCI format 0-0;

(2) Antenna port (Antenna) field, where the antenna port field indicates the DMRS port index value of the terminal;

(3) Repetition field, the Repetition field indicates the antenna port table parameter number and/or the antenna port table number, further, the antenna port table parameter number corresponds to the antenna port table number one to one;

(4) Other domains.

Optionally, other fields indicate antenna port table parameter numbers and/or antenna port table numbers.

The other domains mentioned above refer to domains other than the domains in DCI format 0-0, the antenna port domain, and the repeat domain. Further, the other domains can be set to default values, or at least part of the other domains can be set to defaults. value.

Optionally, the antenna port table parameters may include any one of the antenna port table parameters (1) to (18) described in the terminal-side embodiment:

The antenna port table parameter numbers can be represented by the above (1) to (18), and the antenna port table numbers can be represented by the above Table 1 to Table 18, and of course it is not limited thereto.

It can be understood that the antenna port table includes, but is not limited to, Tables 1 to 18 described in the terminal-side embodiment, or it may also be a new antenna port table agreed by the protocol. In this embodiment, the new antenna port table The parameters in are not specifically limited.

In the embodiment of the present invention, the above-mentioned first DCI format can be any one: (1) DCI format 0-1; (2) DCI format 0-2; (3) Newly defined DCI format, for example: newly defined DCI format 0-0x.

In some embodiments, before step 301, the DCI of the second DCI format is sent, and the second DCI format is DCI format 0-0, that is, the network side can use DCI format 0-0 for scheduling first, and then pass the first DCI format. Information scheduling.

In other embodiments, step 301 can be implemented in the following manner: sending Msg4, where the Msg4 indicates the index value of the DMRS port of the terminal.

In the embodiment of the present invention, before receiving RRC signaling (for example, when only DCI format 0-0 scheduling data is supported), the network can designate the DMRS port to realize multi-stream transmission and/or multi-user transmission.

The following describes the DMRS port enhancement indication solution in the embodiment of the present invention in conjunction with Example 1, Example 2 and Example 3.

Example 1:

In this example, DCI format 0-1 or 0-2 scheduling data is supported.

In an implementation in this example, all fields in DCI format 0-0 are reserved in DCI format 0-1 or 0-2.

Further, DCI format 0-1 or 0-2 and DCI format 0-0 are the same as DCI format 0-0. The indication mode of the domain follows DCI format 0-1 or 0-2, and the terminal demodulates the downlink according to DCI format 0-1 or 0-2. Control information.

In another implementation in this example, in DCI format 0-1 or 0-2, Antenna ports are additionally reserved to indicate the terminal DMRS port index value.

Further, in this example, a default antenna port table (for example, Table 1 to Table 18) can be used, where the antenna port table corresponds to the parameters of the antenna port table one-to-one.

Optionally, the antenna port table parameters may include any one of (1) to (18) described above.

In this example, the antenna port table parameter numbers can be represented by (1) to (18), and the antenna port table numbers can be represented by Table 1 to Table 18 described above, but of course it is not limited to this.

In an implementation manner in this example, the antenna port table parameter number can be directly used to indicate the antenna port table parameter number through the current DCI signaling (DCI format 0-1 or 0-2 DCI); or The antenna port table number directly indicates the antenna port table number through the current DCI signaling.

In an implementation in this example, the DCI signaling may use domains other than the DCI format 0-0 and the Antenna ports domain to indicate antenna port table parameter numbers and/or antenna port table numbers.

In an implementation in this example, DCI format 0-1 or 0-2 includes all fields in DCI format 0-0 as described above, plus a repetition (Repetition) field, at least one of these fields The field indicates the antenna port table parameter number.

It is understandable that the antenna port table in this example includes but is not limited to the above-mentioned Table 1 to Table 18, and may also be a new antenna port table agreed by the protocol.

In an implementation in this example, if the corresponding beam information after beam training is not obtained, the monitored SSB beam is used for transmission.

In this example, DCI format 0-1 or 0-2 has a fixed bit overhead, for example, 1bit or 2bit.

In the embodiment of the present invention, when only DCI format 0-0 scheduling data is supported, the DCI format 0-1 or 0-2 can be used to designate the DMRS port, thereby realizing multi-stream transmission and/or multi-user transmission.

Example 2:

In this example, the use of newly defined DCI format scheduling data is supported, such as the new DCI format 0-0x, which is of course not limited to this.

In an implementation in this example, all fields in DCI format 0-0 are reserved in DCI format 0-0x.

In another implementation in this example, the DCI format 0-0x adds the Antenna ports field to indicate the terminal DMRS port index value.

Further, in this example, a default antenna port table (for example, Table 1 to Table 18) can be used, where the antenna port table corresponds to the parameters of the antenna port table one-to-one.

Optionally, the antenna port table parameters may include any of the following (1) to (18):

(1) transform precoder=enable, dmrs-Type=1, maxLength=1 (corresponding to Table 1 in the above antenna port table);

(2) transform precoder=enable, dmrs-Type=1, maxLength=2 (corresponding to Table 2 in the above antenna port table);

(3) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=1 (corresponding to Table 3 in the above antenna port table);

(4) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=2 (corresponding to Table 4 in the above antenna port table);

(5) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=3 (corresponding to Table 5 in the above antenna port table);

(6) transform precoder=disable, dmrs-Type=1, maxLength=1, rank=4 (corresponding to Table 6 in the above antenna port table);

(7) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=1 (corresponding to Table 7 in the above antenna port table);

(8) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=2 (corresponding to Table 8 in the above antenna port table);

(9) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=3 (corresponding to Table 9 in the above antenna port table);

(10) transform precoder=disable, dmrs-Type=1, maxLength=2, rank=4 (corresponding to Table 10 in the above antenna port table);

(11) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=1 (corresponding to Table 11 in the above antenna port table);

(12) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=2 (corresponding to Table 12 in the above antenna port table);

(13) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=3 (corresponding to Table 13 in the above antenna port table);

(14) transform precoder=disable, dmrs-Type=2, maxLength=1, rank=4 (corresponding to Table 14 in the above antenna port table);

(15) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=1 (corresponding to Table 15 in the above antenna port table);

(16) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=2 (corresponding to Table 16 in the above antenna port table);

(17) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=3 (corresponding to Table 17 in the above antenna port table);

(18) transform precoder=disable, dmrs-Type=2, maxLength=2, rank=4 (corresponding to Table 18 in the above antenna port table).

In this example, the antenna port table parameter numbers can be represented by the above (1) to (18), and the antenna port table numbers can be represented by the above Table 1 to Table 18, but of course it is not limited to this.

In an implementation manner in this example, the antenna port table parameter number can be directly used to indicate the antenna port table parameter number through the current DCI signaling (DCI format 0-0x); or the antenna port table number , Directly indicate the antenna port table number through the current DCI signaling.

It is understandable that if indicated by the current DCI signaling, it indicates that the DCI format 0-0x includes a field indicating the antenna port table parameter table.

It is understandable that the antenna port table in this example includes but is not limited to the above-mentioned Table 1 to Table 18, or it can also be a new antenna port table agreed by the protocol. In this embodiment, the new antenna port table The parameters are not specifically limited.

In an implementation in this example, if the corresponding beam information after beam training is not obtained, the monitored SSB beam is used for transmission.

In this example, DCI format 0-0x has a fixed bit overhead, for example, 1bit or 2bit.

In the embodiment of the present invention, when only DCI format 0-0 scheduling data is supported, the DMRS port can be specified through DCI format 0-0x, thereby realizing multi-stream transmission and/or multi-user transmission.

Example 3:

In this example, Msg4 is supported to indicate the corresponding DMRS port index value of the terminal.

It is understandable that the antenna port table in this example includes but is not limited to the above-mentioned Table 1 to Table 18, and may also be a new antenna port table agreed by the protocol.

In the embodiment of the present invention, when only DCI format 0-0 scheduling data is supported, the DMRS port can be designated by Msg4, thereby realizing multi-stream transmission and/or multi-user transmission.

Referring to FIG. 4, an embodiment of the present invention also provides a terminal, and the terminal 400 includes:

The first receiving module 401 is configured to receive first information before receiving RRC signaling, where the first information indicates the DMRS port of the terminal.

In some implementation manners, the step of receiving the RRC signaling includes at least one of the following:

(1) Before the RRC connection is established;

(2) After changing from idle state to connected state, before receiving RRC reconfiguration for the first time;

(3) After changing from the inactive state to the connected state, before receiving the RRC reconfiguration for the first time.

In some embodiments, the first receiving module 401 is further configured to: receive the DCI of the first DCI format, where the first DCI format indicates the DMRS port of the terminal.

Optionally, the first DCI format includes one or more of the following:

(1) All or part of the domains in DCI format 0-0;

(2) Antenna domain, where the Antenna domain indicates the DMRS port index value of the terminal;

(3) The Repetition field, where the Repetition field indicates the antenna port table parameter number and/or the antenna port table number, and further, the antenna port table parameter number corresponds to the antenna port table number one to one;

(4) Other domains.

Optionally, other fields indicate antenna port table parameter numbers and/or antenna port table numbers.

The above-mentioned other domains refer to domains other than at least part of the domain, antenna port domain, and repetition domain in DCI format 0-0. Further, the other domains can be set to default values, or at least part of the other domains can be set Into the default value.

In some implementation manners, the terminal 400 further includes: a second receiving module, configured to receive DCI of a second DCI format, where the second DCI format is DCI format 0-0.

In some embodiments, the first DCI format is any one of the following: (1) DCI format 0-1; (2) DCI format 0-2; (3) newly defined DCI format, for example: newly defined DCI format 0-0x.

Further, the first DCI format has a fixed bit overhead, such as 1 bit, 2 bits, and so on.

In some embodiments, the first receiving module 401 is further configured to receive Msg4, where the Msg4 indicates the index value of the DMRS port of the terminal.

In some implementation manners, the terminal 400 further includes: a transmission module, configured to perform transmission through the monitored SSB beam if the beam information after beam training is not obtained.

In some embodiments, the transmission module is further configured to: receive the PDCCH carrying the first information through the monitored SSB beam; or, send the PUSCH scheduled by the first information through the monitored SSB beam.

The terminal provided in the embodiment of the present invention can execute the method embodiment shown in FIG. 2 above, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.

Referring to FIG. 5, an embodiment of the present invention also provides a network device, and the network device 500 includes:

The first sending module 501 is configured to send first information before sending RRC signaling, where the first information indicates the DMRS port of the terminal.

In some implementation manners, the sending of RRC signaling includes at least one of the following:

Before the RRC connection is established;

After changing from idle state to connected state, before sending RRC reconfiguration for the first time;

After changing from the inactive state to the connected state, before sending the RRC reconfiguration for the first time.

In some embodiments, the first sending module 501 is further configured to send the DCI of the first DCI format, where the first DCI format indicates the DMRS port of the terminal.

Optionally, the first DCI format includes one or more of the following:

(1) All or part of the domains in DCI format 0-0;

(2) Antenna port (Antenna) field, where the antenna port field indicates the DMRS port index value of the terminal;

(3) Repetition field, the Repetition field indicates the antenna port table parameter number and/or the antenna port table number, further, the antenna port table parameter number corresponds to the antenna port table number one to one;

(4) Other domains.

Optionally, other fields indicate antenna port table parameter numbers and/or antenna port table numbers.

The above-mentioned other domains refer to domains other than at least part of the domain, antenna port domain, and repetition domain in DCI format 0-0. Further, the other domains can be set to default values, or at least part of the other domains can be set Into the default value.

In some embodiments, the first DCI format is any one of the following: (1) DCI format 0-1; (2) DCI format 0-2; (3) newly defined DCI format, for example: newly defined DCI format 0-0x.

In some embodiments, the network device 500 further includes:

The second sending module is configured to send the DCI of the second DCI format, where the second DCI format is DCI format 0-0.

In some embodiments, the first sending module 501 is further configured to send Msg4, where the Msg4 indicates the index value of the DMRS port of the terminal.

The network device provided by the embodiment of the present invention can execute the method embodiment shown in FIG. 3 above, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.

Please refer to FIG. 6. FIG. 6 is a structural diagram of a communication device applied in an embodiment of the present invention. As shown in FIG. 6, the communication device 600 includes: a processor 601, a transceiver 602, a memory 603, and a bus interface. The processor 601 Can be responsible for managing the bus architecture and general processing. The memory 603 may store data used by the processor 601 when performing operations.

In an embodiment of the present invention, the communication device 600 further includes: a program that is stored in the memory 603 and can be run on the processor 601, and when the program is executed by the processor 601, the method shown in FIG. 2 or FIG. 3 is implemented. step.

In FIG. 6, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 601 and various circuits of the memory represented by the memory 603 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 602 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.

The communication device provided in the embodiment of the present invention may execute the method embodiment shown in FIG. 2 or FIG. 3, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.

The steps of the method or algorithm described in conjunction with the disclosure of the present invention can be implemented in a hardware manner, or can be implemented in a manner that a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), erasable programmable read-only memory (Erasable PROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an application specific integrated circuit (ASIC). In addition, the ASIC may be located in the core network interface device. Of course, the processor and the storage medium may also exist as discrete components in the core network interface device.

Those skilled in the art should be aware that, in one or more of the above examples, the functions described in the present invention can be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention. The protection scope, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of the present invention shall be included in the protection scope of the present invention.

Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

The embodiments of the present invention are described with reference to the flowcharts and/or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (38)

1. A method for demodulating reference signal DMRS port indication, applied to a terminal, includes:

   Before receiving the radio resource control RRC signaling, receive first information, where the first information indicates the DMRS port of the terminal.
2. The method according to claim 1, wherein, before receiving RRC signaling, the method includes at least one of the following:

   Before the RRC connection is established;

   After changing from idle state to connected state, before receiving RRC reconfiguration for the first time;

   After changing from the inactive state to the connected state, before receiving the RRC reconfiguration for the first time.
3. The method according to claim 1, wherein said receiving the first information comprises:

   Receive the DCI of the first downlink control information DCI format format, where the first DCI format indicates the DMRS port of the terminal.
4. The method according to claim 3, wherein the first DCI format includes one or more of the following:

   DCI format all or part of the domains in 0-0;

   An antenna port field, where the antenna port field indicates the DMRS port index value of the terminal;

   Repeat the Repetition field, where the Repetition field indicates the antenna port table parameter number and/or the antenna port table number;

   Other domains.
5. The method according to claim 3, wherein the first DCI format has a fixed bit overhead.
6. The method according to any one of claims 3 to 5, wherein the first DCI format is any one of the following:

   DCI format 0-1;

   DCI format 0-2;

   Newly defined DCI format.
7. The method according to claim 1, further comprising:

   If the beam information after beam training is not obtained, transmission is carried out through the beam of the monitored synchronization signal block SSB.
8. The method according to claim 7, wherein the transmission through the monitored SSB beam comprises:

   Receiving the physical downlink control channel PDCCH that carries the first information through the monitored SSB beam;

   or,

   The physical uplink shared channel PUSCH scheduled by the first information is sent through the monitored SSB beam.
9. The method according to claim 1, wherein said receiving the first information comprises:

   Message 4 is received, and the message 4 indicates the index value of the DMRS port of the terminal.
10. The method according to claim 1, wherein, before the receiving the first information, the method further comprises:

    Receive the DCI of the second DCI format, where the second DCI format is DCI format 0-0.
11. A method for DMRS port indication, applied to network equipment, includes:

    Before sending the RRC signaling, send first information, where the first information indicates the DMRS port of the terminal.
12. The method according to claim 11, wherein the sending of RRC signaling includes at least one of the following:

    Before the RRC connection is established;

    After changing from idle state to connected state, before sending RRC reconfiguration for the first time;

    After changing from the inactive state to the connected state, before sending the RRC reconfiguration for the first time.
13. The method according to claim 11, wherein said sending the first information comprises:

    Send the DCI of the first DCI format, where the first DCI format indicates the DMRS port of the terminal.
14. The method according to claim 13, wherein the first DCI format includes one or more of the following:

    DCI format all or part of the domains in 0-0;

    An antenna port field, where the antenna port field indicates the DMRS port index value of the terminal;

    Repetition field, where the Repetition field indicates the antenna port table parameter number and/or the antenna port table number;

    Other domains.
15. The method according to claim 13, wherein the first DCI format has a fixed bit overhead.
16. The method according to any one of claims 13 to 15, wherein the first DCI format is any one of the following:

    DCI format 0-1;

    DCI format 0-2;

    Newly defined DCI format.
17. The method according to claim 11, wherein said sending the first information comprises:

    Send Msg4, where the Msg4 indicates the index value of the DMRS port of the terminal.
18. The method according to claim 11, wherein, before the sending the first information, the method further comprises:

    Send the DCI of the second DCI format, where the second DCI format is DCI format 0-0.
19. A terminal including:

    The first receiving module is configured to receive first information before receiving radio resource control RRC signaling, where the first information indicates a demodulation reference signal DMRS port of the terminal.
20. The terminal according to claim 19, wherein said before receiving RRC signaling comprises at least one of the following:

    Before the RRC connection is established;

    After changing from idle state to connected state, before receiving RRC reconfiguration for the first time;

    After changing from the inactive state to the connected state, before receiving the RRC reconfiguration for the first time.
21. The terminal according to claim 19, wherein the first receiving module is further configured to receive the DCI of the first downlink control information DCI format format, the first DCI format indicating the DMRS port of the terminal.
22. The terminal according to claim 21, wherein the first DCI format includes one or more of the following:

    DCI format all or part of the domains in 0-0;

    Antenna domain, where the Antenna domain indicates the DMRS port index value of the terminal;

    Repetition field, where the Repetition field indicates the antenna port table parameter number and/or the antenna port table number;

    Other domains.
23. The terminal according to claim 21, wherein the first DCI format has a fixed bit overhead.
24. The terminal according to any one of claims 21-23, wherein the first DCI format is any one of the following:

    DCI format 0-1;

    DCI format 0-2;

    Newly defined DCI format.
25. The terminal according to claim 19, further comprising: a transmission module, configured to perform transmission through the monitored beam of the synchronization signal block SSB if the beam information after beam training is not obtained.
26. The terminal according to claim 25, wherein the transmission module is further configured to: receive the PDCCH carrying the first information through the monitored SSB beam; or send the first information scheduling physical uplink sharing through the monitored SSB beam Channel PUSCH.
27. The terminal according to claim 19, wherein the first receiving module is further configured to receive message 4 (Msg4), the Msg4 indicating the index value of the DMRS port of the terminal.
28. The terminal according to claim 19, further comprising: a second receiving module, configured to receive DCI of a second DCI format, where the second DCI format is DCI format 0-0.
29. A network device including:

    The first sending module is configured to send first information before the terminal receives the RRC signaling, where the first information indicates the DMRS port of the terminal.
30. The network device according to claim 29, wherein said before sending RRC signaling comprises at least one of the following:

    Before the RRC connection is established;

    After changing from idle state to connected state, before sending RRC reconfiguration for the first time;

    After changing from the inactive state to the connected state, before sending the RRC reconfiguration for the first time.
31. The network device according to claim 29, wherein the first sending module is further configured to send a DCI of a first DCI format, and the first DCI format indicates a DMRS port of the terminal.
32. The network device according to claim 31, wherein the first DCI format includes one or more of the following:

    DCI format all or part of the domains in 0-0;

    An antenna port (Antenna) field, where the antenna port field indicates the DMRS port index value of the terminal;

    A repetition (Repetition) field, where the Repetition field indicates the antenna port table parameter number and/or the antenna port table number;

    Other domains.
33. The network device according to claim 31, wherein the first DCI format has a fixed bit overhead.
34. The network device according to any one of claims 31-33, wherein the first DCI format is any one of the following:

    DCI format 0-1;

    DCI format 0-2;

    Newly defined DCI format.
35. The network device according to claim 29, further comprising:

    The second sending module is configured to send the DCI of the second DCI format, where the second DCI format is DCI format 0-0.
36. The network device according to claim 29, wherein the first sending module is further configured to send Msg4, the Msg4 indicating the index value of the DMRS port of the terminal.
37. A communication device, comprising: a processor, a memory, and a program stored on the memory and capable of running on the processor, the program being executed by the processor including any one of claims 1 to 10 One of the steps of the method for DMRS port indication; or, the steps of the method for DMRS port indication according to any one of claims 11 to 18.
38. A computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, a method including the DMRS port indication according to any one of claims 1 to 10 is realized Or, the step of the method for DMRS port indication according to any one of claims 11 to 18.

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