CN113014363A

CN113014363A - DMRS port indication method and device

Info

Publication number: CN113014363A
Application number: CN201911320995.9A
Authority: CN
Inventors: 施源; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-06-22
Anticipated expiration: 2039-12-19
Also published as: CN113014363B; WO2021121177A1

Abstract

The embodiment of the invention provides a method and equipment for indicating a DMRS port, wherein the method comprises the following steps: receiving first information before RRC signaling is received, wherein the first information indicates a 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), multiflow and/or multiuser transmission may be implemented by specifying DMRS ports by a network.

Description

DMRS port indication method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for indicating a Demodulation Reference Signal (DMRS) port.

Background

Currently, the existing protocols provide that a terminal (e.g., a User Equipment (UE)) does not expect to receive Downlink Control Information (DCI) format (format)0-1 before obtaining Radio Resource Control (RRC) configuration. An antenna port (antenna ports) (i.e., DMRS port) field included in DCI format 0-1 determines an antenna port table according to whether transmission precoding (transform coder) is enabled (enabled/disabled), a Type (1/2) of DMRS-Type, a value (1/2) of maximum length (maxLength), and a rank number determined according to a channel Sounding Reference Signal (SRS) resource flag in the DCI field or Txconfig codebook (codebook) when transmitting the configuration parameter (Txconfig) is non-codebook (nocodebook), and determines a specific DMRS port according to precoding information in the DCI field and a rank number determined according to precoding information and number of layers in the DCI field.

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

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

Disclosure of Invention

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

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

receiving first information before receiving Radio Resource Control (RRC) signaling, wherein the first information indicates a DMRS port of the terminal.

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

transmitting first information indicating a DMRS port of the terminal before transmitting RRC signaling.

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

the terminal comprises a first receiving module, a second receiving module and a transmitting module, wherein the first receiving module is used for receiving first information before receiving Radio Resource Control (RRC) signaling, and the first information indicates a DMRS port of the terminal.

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

a first sending module, configured to send first information before sending RRC signaling, where the first information indicates a 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 executable on the processor, the program, when executed by the processor, implementing the steps of a method comprising DMRS port indication as described in the first or second aspect.

In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium is characterized by storing thereon a computer program, which when executed by a processor, implements the steps of a method including the DMRS port indication as described in the first aspect or the second aspect.

In the embodiment of the present invention, before receiving RRC signaling (for example, when only DCI format 0-0 scheduling data is supported), multiflow and/or multiuser transmission may be implemented by specifying DMRS ports by a network.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings.

In the drawings:

FIG. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;

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

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

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

FIG. 5 is a schematic diagram of a network device according to an embodiment of the invention;

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

Detailed Description

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

first, fields included in DCIs 0-0 and 0-1:

1. DCI format 0-0(DCI format 0-0with CRC coded by C-RNTI/CS-RNTI/MCS-C-RNTI) of Cyclic redundancy check (Cyclic redundancy check) scrambled by Cell radio network temporary identifier (Cell RNTI, C-RNTI) or configuration Scheduling RNTI (CS-RNTI) or Modulation Coding strategy Cell RNTI (MCS-C-RNTI):

(1) an identifier (identifier for DCI format) of 1bit is fixed to 0, and indicates an uplink

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

(3) time domain resource allocation (time domain resource assignment);

(4) a frequency hopping flag (frequency hopping flag);

(5) modulation and coding scheme (Modulation and coding scheme);

(6) a new data indicator (new data indicator);

(7) redundancy version (Redundancy version);

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

(9) scheduling a TPC command (TPC command for scheduled PUSCH) of the PUSCH;

(10) padding bits (padding bits);

(11) an uplink or supplemental uplink indicator (UL/SUL indicator).

2. DCI format 0-0(DCI format 0-0with CRC coded by TC-RNTI) of CRC scrambled by Temporary Cell Radio Network Temporary Identity (TC-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. DCI format 0-0(DCI format 0_1with CRC scrambled by C-RNTI or CS-RNTI or Semi-Persistent CSI RNTI (SP-CSI-RNTI) or MCS-C-RNTI) of CRC scrambled by C-RNTI or CS-RNTI or Semi-Persistent CSI RNTI (DCI-CSI-RNTI or SP-CSI-RNTI or MCS-C-RNTI):

(1)identifier for DCI format；

(2) a carrier indicator (carrier indicator);

(3)UL/SUL indicator；

(4) a bandwidth part indicator (BWP indicator);

(5)frequency domain resource assignment；

(6)time domain resource assignment；

(7) a frequency hopping flag (frequency hopping flag);

(8)Modulation and coding scheme；

(9)new data indicator；

(10)Redundancy version；

(11)HARQ process number；

(12) a first downlink allocation index (1st downlink allocation index);

(13) a second downlink allocation index (2nd downlink allocation index);

(14)TPC command for scheduled PUSCH；

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

(16) precoding information and number of layers (layers);

(17)Antenna ports(DMRS port)；

(18) SRS request (SRS request);

(19) a 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) an uplink channel indicator (UL-SCH indicator);

(25)padding bits。

second, regarding the antenna port tables (see table 1 to table 18):

(1) the antenna port table parameters include: transmission precoding is enabled, DMRS Type (DMRS-Type) 1, maximum length (maxLength) 1.

Table 1:

(2) the antenna port table parameters include: transform coder is enabled, dmrs-Type ═ 1, maxLength ═ 2.

Table 2:

(3) the antenna port table parameters include: transmission precoding 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 coder is disabled, dmrs-Type 1, maxLength 1, and 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 coder is disabled, dmrs-Type 1, maxLength 1, and 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 coder is disabled, dmrs-Type 1, maxLength 1, and 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 coder is disabled, dmrs-Type ═ 1, maxLength ═ 2, and rank ═ 1.

Table 7:

(8) the antenna port table parameters include: transform coder is disabled, dmrs-Type ═ 1, maxLength ═ 2, and rank ═ 2.

Table 8:

(9) the antenna port table parameters include: transform coder is disabled, dmrs-Type ═ 1, maxLength ═ 2, and rank ═ 3.

Table 9:

(10) the antenna port table parameters include: transform coder is disabled, dmrs-Type ═ 1, maxLength ═ 2, and rank ═ 4.

Table 10:

(11) the antenna port table parameters include: transform coder is disabled, dmrs-Type ═ 2, maxLength ═ 1, and rank ═ 1.

Table 11:

(12) the antenna port table parameters include: transform coder is disabled, dmrs-Type 2, maxLength 1, and 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 coder 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 coder 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 coder is disabled, dmrs-Type 2, maxLength 2, and rank 1.

Table 15:

(16) the antenna port table parameters include: transform coder is disabled, dmrs-Type 2, maxLength 2, and rank 2.

Table 16:

(17) the antenna port table parameters include: transform coder is disabled, dmrs-Type 2, maxLength 2, and rank 3.

Table 17:

(18) the antenna port table parameters include: transform coder is disabled, dmrs-Type 2, maxLength 2, and rank 4.

Table 18:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.

Embodiments of the present invention are described below with reference to the accompanying drawings. The method and the device for indicating the DMRS port can be applied to a wireless communication system. Referring to fig. 1, an architecture diagram of a wireless communication system according to an embodiment of the present invention is shown. As shown in fig. 1, the wireless communication system may include: network device 11 and terminal 12, terminal 12 may be referred to as UE12, and terminal 12 may communicate (transmit signaling or transmit data) with network device 11. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.

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 (e.g., a next generation base station (gNB) or a 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 (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device.

Referring to fig. 2, an embodiment of the present invention provides a method for DMRS port indication, where an execution subject of the method may be a terminal, and the method includes: step 201.

Step 201: receiving first information before receiving Radio Resource Control (RRC) signaling, wherein the first information indicates a DMRS port of the terminal.

For example, the first information indicates a DMRS port where the terminal performs 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 embodiments, the receiving of the RRC signaling comprises at least one of:

(1) before RRC connection establishment;

(2) after the idle state is converted into the connected state, before RRC reconfiguration is received for the first time;

(3) after the non-active state is changed into the connected state, the RRC is firstly received before reconfiguration.

In some embodiments, step 201 may be implemented by: receiving DCI of a first DCI format, wherein the first format indicates a DMRS port of the terminal.

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

(1) all or part of fields in the DCI format 0-0;

(2) an Antenna port (Antenna) field indicating a DMRS port index value of the terminal;

(3) repeating (Repetition) fields, wherein the Repetition fields indicate the parameter numbers of the antenna port tables and/or the antenna port tables, and further, the parameter numbers of the antenna port tables correspond to the parameter numbers of the antenna port tables one by one;

(4) other domains.

Optionally, the other field indicates an antenna port table parameter number and/or an antenna port table number.

The other fields mentioned above refer to fields other than at least some of the fields, the antenna port field, and the repetition field in DCI format 0-0, and further, the other fields may be set to default values, or at least some of the other fields may be set to default values.

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

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

(1) an identifier of the DCI format (identifier for DCI format);

(3) time domain resource allocation (time domain resource assignment);

(4) a frequency hopping flag (frequency hopping flag);

(5) modulation and coding scheme (Modulation and coding scheme);

(6) a new data indicator (new data indicator);

(7) redundancy version (Redundancy version);

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

(9) scheduling a TPC command (TPC command for scheduled PUSCH) of the PUSCH;

(10) padding bits (padding bits);

(11) an uplink or supplemental uplink indicator (UL/SUL indicator).

It can be understood that the indication manner of the same field of the first DCI format and DCI format 0-0 follows the first DCI format, and the terminal demodulates the corresponding DCI according to the first DCI format.

Alternatively, the antenna port table parameter may include any one of the following (1) to (18):

(1) transform coder ═ enable, dmrs-Type ═ 1, maxLength ═ 1 (corresponding to table 1 in the above antenna port table);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

It is understood that the antenna port tables include, but are not limited to, the above-described tables 1 to 18, or may also be a new antenna port table agreed by a protocol, and in this embodiment, the parameters in the new antenna port table are not particularly limited.

In other embodiments, step 201 may be implemented by:

receiving a message 4(Msg4), wherein the Msg4 indicates an index value of the DMRS port of the terminal.

It is understood that the Msg4 is Msg4 sent by the base station to the terminal before RRC connection establishment, and the Msg4 carries a contention resolution Identity (ID).

In an embodiment of the present invention, the 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 (URLLC) transmission, but the protocol is not limited, and is equivalent to a simplified version of DCI format 0-1;

(3) a newly defined DCI format, for example: the newly defined DCI format 0-0x, it is understood that the form of the newly defined DCI format is not limited.

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

In some embodiments, the method further comprises: if no beam (beam) information is obtained after beam training, transmission is performed through beams of a listening Synchronization Signal block (Synchronization Signal and PBCH block, SSB).

For example, a Physical Downlink Control Channel (PDCCH) carrying first information (e.g., DCI of a first DCI format) is received through a beam of the monitored SSB; or, a Physical Uplink Shared Channel (PUSCH) scheduled by the first information is transmitted.

In some embodiments, before step 201, the DCI of the second DCI format is received, where the second DCI format is DCI format 0-0, that is, the network side may use DCI format 0-0 scheduling first and then schedule through the first information.

Referring to fig. 3, an embodiment of the present invention further provides a method for DMRS port indication, where an execution subject of the method is a network device, and the method includes: step 301.

Step 301: transmitting first information indicating a DMRS port of the terminal before transmitting RRC signaling.

In some embodiments, the sending RRC signaling comprises at least one of:

before RRC connection establishment;

after the idle state is converted into the connected state, before RRC reconfiguration is sent for the first time;

after the non-active state is changed into the connected state, before RRC reconfiguration is sent for the first time.

In some embodiments, step 301 may be implemented by: sending DCI of a first DCI format, wherein the first DCI format indicates a DMRS port of the terminal.

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

(1) all or part of fields in the DCI format 0-0;

(4) other domains.

The other fields mentioned above refer to fields other than the fields, the antenna port fields, and the repetition fields in DCI format 0-0, and further, the other fields may be set to default values, or at least some of the other fields may be set to default values.

Alternatively, the antenna port table parameter 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 may be represented by the above items (1) to (18), and the antenna port table numbers may be represented by the above items (1) to (18), but are not limited thereto.

It is understood that the antenna port tables include, but are not limited to, tables 1 to 18 described in the terminal side embodiment, or may also be a new antenna port table agreed by a protocol, and parameters in the new antenna port table are not particularly limited in this embodiment.

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

In some embodiments, before step 301, the DCI of the second DCI format is sent, where the second DCI format is DCI format 0-0, that is, the network side may use DCI format 0-0 scheduling first and then schedule through the first information.

In other embodiments, step 301 may be implemented by: sending Msg4, the Msg4 indicating an index value of the terminal's DMRS port.

The DMRS port enhancement indication scheme in the embodiment of the present invention is described below with reference to example 1, example 2, and example 3.

Example 1:

in this example, scheduling of data using DCI format 0-1 or 0-2 is supported.

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

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

In another implementation manner in the present example, the Antenna ports indication terminal DMRS port index value is additionally reserved in DCI format 0-1 or 0-2.

Further, a default antenna port table (e.g., tables 1-18) may be employed in this example, where the antenna port table corresponds to the antenna port table parameters one-to-one.

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

In the present example, the antenna port table parameter numbers may be represented by (1) to (18), and the antenna port table numbers may be represented by tables 1 to 18 as described above, but are not limited thereto.

In an implementation manner in this example, the antenna port table parameter number may be directly indicated by a current DCI signaling (DCI format 0-1 or DCI format 0-2); or, the antenna port table number is directly indicated by the current DCI signaling.

In one implementation in this example, DCI signaling may use fields other than the fields in DCI format 0-0 and Antenna ports fields for indication of Antenna port table parameter numbers and/or Antenna port table numbers.

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

It is understood that the antenna port tables in this example include, but are not limited to, the above-described tables 1-18, and may also be new antenna port tables agreed by the protocol.

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

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

In the embodiment of the invention, when only DCI format 0-0 scheduling data is supported, the multi-stream transmission and/or multi-user transmission can be realized by the specification of the DCI format 0-1 or 0-2 to the DMRS port.

Example 2:

in this example, scheduling data using the newly defined DCI format is supported, for example, the new DCI format 0-0x, but is not limited thereto.

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

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

In this example, the antenna port table parameter numbers may be represented by the above-described (1) to (18), and the antenna port table numbers may be represented by the above-described tables 1 to 18, but are not limited thereto.

In an implementation manner in this example, the antenna port table parameter number may be directly indicated by current DCI signaling (DCI format 0-0 x); or, the antenna port table number is directly indicated by the current DCI signaling.

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

It is understood that the antenna port table in this example includes, but is not limited to, the above-described tables 1 to 18, or may also be a new antenna port table agreed by a protocol, and parameters in the new antenna port table are not particularly limited in this embodiment.

In this example, DCI formats 0-0x have a fixed bit overhead, e.g., 1bit or 2bit, etc.

In the embodiment of the invention, when only DCI format 0-0 scheduling data is supported, the DMRS ports are specified through the DCI format 0-0x, so that multi-stream transmission and/or multi-user transmission are realized.

Example 3:

in this example, indication of the terminal's corresponding DMRS port index value using Msg4 is supported.

In the embodiment of the invention, when only DCI format 0-0 scheduling data is supported, multi-stream transmission and/or multi-user transmission can be realized through the specification of Msg4 to DMRS ports.

Referring to fig. 4, an embodiment of the present invention further provides a terminal, where the terminal 400 includes:

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

(1) before RRC connection establishment;

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

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

(1) all or part of fields in the DCI format 0-0;

(2) an Antenna field indicating a DMRS port index value of the terminal;

(3) a Repetition field indicating the antenna port table parameter numbers and/or the antenna port table numbers, further, the antenna port table parameter numbers correspond to the antenna port table numbers one by one;

(4) other domains.

In some embodiments, the terminal 400 further comprises: and the second receiving module is used for receiving the DCI of a second DCI format, wherein the second DCI format is DCI format 0-0.

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

Further, the first DCI format has a fixed bit overhead, e.g., 1bit, 2 bits, etc.

In some embodiments, the first receiving module 401 is further configured to: receiving an Msg4, the Msg4 indicating an index value of a DMRS port of the terminal.

In some embodiments, the terminal 400 further comprises: and the transmission module is used for transmitting through the monitored beam of the SSB if the beam information after the beam training is not obtained.

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

The terminal provided in the embodiment of the present invention may execute the method embodiment shown in fig. 2, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 5, an embodiment of the present invention further provides a network device, where the network device 500 includes:

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

In some embodiments, the sending RRC signaling comprises at least one of:

before RRC connection establishment;

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

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

(1) all or part of fields in the DCI format 0-0;

(4) other domains.

In some embodiments, the network device 500 further comprises:

and the second sending module is used for sending the DCI of a second DCI format, wherein the second DCI format is DCI format 0-0.

In some embodiments, the first sending module 501 is further configured to: sending Msg4, the Msg4 indicating an index value of the terminal's DMRS port.

The network device provided in the embodiment of the present invention may execute the method embodiment shown in fig. 3, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

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

In one embodiment of the present invention, the communication device 600 further comprises: a program stored in the memory 603 and executable on the processor 601, which program when executed by the processor 601, performs the steps in the method of fig. 2 or 3 above.

In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a 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, which implements similar principles and technical effects, and this embodiment is not described herein again.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable hard disk, a compact disc Read Only Memory (cd-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A method for indicating a demodulation reference signal (DMRS) port is applied to a terminal and is characterized by comprising the following steps:

2. The method of claim 1, wherein the receiving the RRC signaling comprises at least one of:

before RRC connection establishment;

after the idle state is converted into the connected state, before RRC reconfiguration is received for the first time;

after the non-active state is changed into the connected state, the RRC is firstly received before reconfiguration.

3. The method of claim 1, wherein receiving the first information comprises:

receiving DCI of a first downlink control information DCI format, wherein the first DCI format indicates a DMRS port of the terminal.

4. The method of claim 3, wherein the first DCI format comprises one or more of:

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

an antenna port domain indicating a DMRS port index value of the terminal;

repeating a Repetition field, wherein the Repetition field indicates the parameter number of the antenna port table and/or the antenna port table number;

other domains.

5. The method of 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:

DCI format 0-1；

DCI format 0-2；

a newly defined DCI format.

7. The method of claim 1, further comprising:

and if the beam information after the beam training is not obtained, transmitting through the beam of the monitored synchronization signal block SSB.

8. The method of claim 7, wherein transmitting via the beam of the monitored SSB comprises:

receiving a Physical Downlink Control Channel (PDCCH) carrying the first information through a monitored wave beam of the SSB;

alternatively, the first and second electrodes may be,

and sending the Physical Uplink Shared Channel (PUSCH) scheduled by the first information through the monitored beam of the SSB.

9. The method of claim 1, wherein receiving the first information comprises:

receiving a message 4, wherein the message 4 indicates an index value of the DMRS port of the terminal.

10. The method of claim 1, wherein prior to receiving the first information, the method further comprises:

receiving DCI of a second DCI format, wherein the second DCI format is DCI format 0-0.

11. A method for indicating a DMRS port is applied to network equipment, and is characterized by comprising the following steps:

12. The method of claim 11, wherein the sending the RRC signaling comprises at least one of:

before RRC connection establishment;

13. The method of claim 11, wherein sending the first information comprises:

sending DCI of a first DCI format, wherein the first DCI format indicates a DMRS port of the terminal.

14. The method of claim 13, wherein the first DCI format comprises one or more of:

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

an antenna port domain indicating a DMRS port index value of the terminal;

a Repetition field indicating an antenna port table parameter number and/or an antenna port table number;

other domains.

15. The method of 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:

DCI format 0-1；

DCI format 0-2；

a newly defined DCI format.

17. The method of claim 11, wherein sending the first information comprises:

sending Msg4, the Msg4 indicating an index value of the terminal's DMRS port.

18. The method of claim 11, wherein prior to the sending the first information, the method further comprises:

and sending the DCI of a second DCI format, wherein the second DCI format is DCI format 0-0.

19. A terminal, comprising:

20. A network device, comprising:

the terminal comprises a first sending module, a second sending module and a sending module, wherein the first sending module is used for sending first information before the terminal receives RRC signaling, and the first information indicates a DMRS port of the terminal.

21. A communication device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of a method comprising the DMRS port indication as defined in any one of the claims 1 to 10; alternatively, the steps of a method of DMRS port indication as claimed in any one of claims 11 to 18.

22. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of a method comprising the DMRS port indication as defined in any one of the claims 1 to 10; alternatively, the steps of a method of DMRS port indication as claimed in any one of claims 11 to 18.