CN110138525B

CN110138525B - Configuration method, transmission method, terminal and network side equipment of demodulation reference signal

Info

Publication number: CN110138525B
Application number: CN201810135116.4A
Authority: CN
Inventors: 孙晓东; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2022-07-08
Anticipated expiration: 2038-02-09
Also published as: CN110138525A

Abstract

The embodiment of the invention provides a configuration method, a transmission method, a terminal and network side equipment of a demodulation reference signal, wherein the transmission method comprises the following steps: the terminal acquires DMRS configuration related information indicated in the DCI, wherein the DMRS configuration related information at least comprises the number of symbols contained in a PUSCH/PDSCH; selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; in the DMRS position set, each DMRS position subset corresponds to one DMRS parameter group; and transmitting the DMRS in the DMRS position subset corresponding to the DMRS configuration related information. The embodiment of the invention can solve the problem that the total number of the extra DMRS configured by RRC signaling and the DMRS configuration related information indicated by the DCI are not matched in the prior art, and can improve the DMRS demodulation performance.

Description

Configuration method, transmission method, terminal and network side equipment of demodulation reference signal

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a configuration method, a transmission method, a terminal and network side equipment of a demodulation reference signal.

Background

The fifth Generation (5th Generation, abbreviated as 5G) mobile communication system supports mobile enhanced broadband, low-latency, high-reliability and large-scale machine communication connection services. In order to meet the requirements of different services on performance indexes such as time delay, reliability and the like, a network supports time slot-based scheduling and non-time slot-based scheduling. Accordingly, mapping of uplink and downlink traffic channel Demodulation Reference signals (DMRSs) supports mapping types a and B. In addition, in order to adapt to different scenes such as low frequency, high frequency, low speed, high speed and the like, the demodulation reference signals of the uplink and downlink traffic channels can be configured with 1 or 2 symbols.

For the configuration of DMRS positions, in the prior art, the starting position of the first DMRS (also referred to as a preamble DMRS) is usually agreed by a protocol or configured by the network side, and the positions of the remaining DMRSs (also referred to as additional DMRSs) except for the first DMRS are agreed by the protocol.

When the DMRS positions are configured, the network side configures the total number of the additional DMRS by using Radio Resource Control (RRC) signaling, and dynamically indicates DMRS configuration related information (for example, the number of symbols included in the PUSCH/PDSCH and/or the number of symbols included in the DMRS (1 or 2)) by using Downlink Control Information (DCI), and when the terminal receives the DMRS configuration related information indicated by the DCI, the terminal searches for the corresponding DMRS positions from the positions of the additional DMRS agreed by the protocol.

However, in the prior art, a situation may occur that the total number of the additional DMRSs configured by the RRC signaling and the DMRS configuration related information indicated by the DCI do not match, for example, the total number of the additional DMRSs configured by the RRC is 3, the PUSCH indicated by the DCI includes a symbol number of 9, and the DMRS positions in which the total number of the additional DMRSs is 3 and the symbol number of the PUSCH is 9 are not included in the DMRS positions agreed by the protocol, so that the DMRS demodulation performance is degraded, and the data transmission efficiency is reduced.

Disclosure of Invention

The embodiment of the invention provides a method for configuring and transmitting demodulation reference signals, a terminal and network side equipment, and aims to solve the problem that in the prior art, the total number of extra DMRS configured by RRC signaling is not matched with DMRS configuration related information indicated by DCI, so that the demodulation performance of the DMRS is reduced.

In a first aspect, an embodiment of the present invention provides a method for configuring a PUSCH DMRS, which is applied to a network side device, and includes:

transmitting configuration information of DMRS position sets through RRC signaling, wherein each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission.

Preferably, each PUSCH mapping type contains one set of DMRS locations.

In a second aspect, an embodiment of the present invention provides a configuration method of PDSCH DMRS, applied to a network side device, including:

transmitting configuration information of DMRS position sets through RRC signaling, wherein each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained by the DMRS, the PDSCH mapping type, the total number of additional DMRSs, and the number of symbols contained by the PDSCH.

Preferably, each PDSCH mapping type contains one set of DMRS locations.

In a third aspect, an embodiment of the present invention provides a method for sending a PUSCH DMRS, which is applied to a terminal, and includes:

acquiring DMRS configuration related information indicated in the DCI, wherein the DMRS configuration related information at least comprises symbol numbers contained in a Physical Uplink Shared Channel (PUSCH);

selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

and transmitting the DMRS in the DMRS position subset corresponding to the configuration related information.

Preferably, in the DMRS position set sent by the network side, each PUSCH mapping type includes one DMRS position set.

In a fourth aspect, an embodiment of the present invention provides a receiving method of PDSCH DMRS, where the receiving method is applied to a terminal, and the receiving method includes:

acquiring DMRS configuration related information indicated in the DCI, wherein the DMRS configuration related information at least comprises symbol numbers contained in a physical uplink shared channel (PDSCH);

selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the PDSCH mapping type, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

and receiving the DMRS at the DMRS position corresponding to the configuration related information.

Preferably, in the DMRS position set sent by the network side, each PDSCH mapping type includes one DMRS position set.

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

a transmitting module, configured to transmit configuration information of demodulation reference signal DMRS position sets through RRC signaling, where each DMRS position set includes a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission.

Preferably, each PUSCH mapping type contains one set of DMRS locations.

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

a sending module, configured to send configuration information of a demodulation reference signal DMRS position set through RRC signaling, where each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PDSCH (physical downlink shared channel), the total number of the additional DMRSs and the number of symbols contained in the PDSCH.

Preferably, each PDSCH mapping type contains one set of DMRS locations.

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

an obtaining module, configured to obtain DMRS configuration related information of a demodulation reference signal indicated in DCI, where the DMRS configuration related information at least includes a number of symbols included in a physical uplink shared channel, PUSCH;

a selection module, configured to select a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

and a transmitting module, configured to transmit the DMRS in the DMRS position subset corresponding to the configuration related information.

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

an obtaining module, configured to obtain DMRS configuration related information indicated in the DCI, where the DMRS configuration related information at least includes a symbol number included in a physical uplink shared channel PDSCH;

a selection module, configured to select a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the PDSCH mapping type, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

and a first receiving module, configured to receive the DMRS at the DMRS position corresponding to the configuration related information.

In a ninth aspect, an embodiment of the present invention provides a network-side device, including a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the configuration method. In a tenth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored in the memory and being executable on the processor, where the computer program, when executed by the processor, implements the steps of the above-mentioned transmitting method, or the computer program, when executed by the processor, implements the steps of the above-mentioned receiving method.

In an eleventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the above configuration method, or the computer program, when executed by a processor, implements the steps of the above transmission method, or the computer program, when executed by a processor, implements the steps of the above reception method.

The embodiment of the invention can solve the problem that the total number of the extra DMRS configured by the RRC signaling and the DMRS configuration related information indicated by the DCI are not matched in the prior art, and can improve the demodulation performance of the DMRS.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a mapping position when a first PUSCH DMRS in the number of symbols included in a PUSCH adopts a mapping type a;

fig. 2 is a mapping position when the first PUSCH DMRS in the number of symbols included in the PUSCH adopts mapping type B;

fig. 3 is a flowchart illustrating a configuration method of a PUSCH DMRS according to an embodiment of the present invention;

FIG. 4 is a flow chart illustrating a configuration method PDSCH DMRS according to an embodiment of the invention;

fig. 5 is a flowchart illustrating a method for transmitting a PUSCH DMRS according to an embodiment of the present invention;

fig. 6 is a flow chart illustrating a reception method PDSCH DMRS according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

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.

First, a method for mapping DMRS positions will be briefly described below.

DMRSs include DMRSs of a Physical Uplink Shared Channel (PUSCH for short) and DMRSs of a Physical Downlink Shared Channel (PDSCH for short).

For Physical Uplink Shared Channel (PUSCH) DMRS:

1. in the case of mapping type a:

-starting position/of first PUSCH DMRS₀The reference point of (1) is the 1 st symbol of the slot;

-starting position/of first PUSCH DMRS₀Can be configured on the 1 st, 3 rd or 4 th symbols;

the number of symbols contained for PUSCH may be 4-14.

When the first PUSCH DMRS employs the mapping type a, possible locations are as shown in fig. 1.

2. In the case of mapping type B:

-starting position/of first PUSCH DMRS₀The reference point of (1) is the 1 st symbol of the PUSCH;

-starting position/of first PUSCH DMRS₀Is the 1 st symbol of PUSCH;

PUSCH contains symbols with a number of 1-14.

When the first PUSCH DMRS employs mapping type B, possible locations are as shown in fig. 2.

When the number of symbols included in the PUSCH DMRS is 1, the positions of additional DMRSs other than the first PUSCH DMRS may be configured according to different scenarios, as shown in table 1.

Referring to table 1, table 1 shows positions of PUSCH DMRSs when the number of symbols included in the DMRSs is 1.

TABLE 1

In the above table, 0, 1, 2, and 3 indicate the total number of the additional DMRSs except for the first DMRS among the number of symbols included in the PUSCH, indicate that the number of symbols included in the PUSCH only includes the first DMRS when the total number of the additional DMRSs is 0, and indicate that the number of symbols included in the PUSCH includes one additional DMRS in addition to the first DMRS when the total number of the additional DMRSs is 1. And so on. Each of the DMRS positions is numbered (e.g., "

l

₀6,9 ") denote the starting position of each DMRS, respectively. In the following examples, reference will be made to "

l

₀6,9 "are referred to as a subset of DMRS positions, each DMRS position subset including at least one DMRS position therein.

When the number of symbols included in the PUSCH DMRS is 2, the positions of additional DMRSs other than the first PUSCH DMRS may be configured according to different scenarios, as shown in table 2.

TABLE 2

When the PUSCH employs frequency hopping transmission, a DMRS configured with 1/2 symbols is supported, which may be 1 preamble DMRS (first DMRS) or 1 preamble DMRS and 1 additional DMRS (the rest are additional), wherein 3 symbols are spaced between the 1 preamble DMRS and the 1 additional DMRS.

For a Physical Downlink Shared Channel (PDSCH) DMRS:

1. when the mapping type is A:

the reference point of the start position of the first PDSCH DMRS is the 1 st symbol of the time slot;

the start position of the first PDSCH DMRS can be arranged on the 3 rd or 4 th symbol;

the number of symbols involved for PDSCH may be 4-14.

2. When the mapping type is B:

the reference point of the starting position of the first PDSCH DMRS is the 1 st symbol of the PDSCH;

the starting position of the first PDSCH DMRS is the 1 st symbol of PDSCH;

the number of symbols involved for PDSCH may be 2, 4, 7.

When PDSCH DMRS contains symbols with the number of 1, the positions of additional DMRSs except for the first PDSCH DMRS may be configured according to different scenarios, as in table 3.

TABLE 3

When PDSCH DMRS contains symbols with the number of 2, the positions of additional DMRSs except for the first PDSCH DMRS may be configured according to different scenarios, as in table 4.

TABLE 4

For mapping type B, when the PDSCH contains symbols with

number

2 or 4 or 7, the first PDSCH DMRS is located at the first symbol after the control domain when the partial PDSCH collides with the reserved control domain resources.

The DMRS in the embodiment of the present invention may be a PUSCH DMRS, or PDSCHDMRS, and the following describes the configuration methods of the PUSCH DMRS and PDSCH DMRS in sequence.

In the embodiment of the invention, the DMRS is a PUSCH DMRS.

Referring to fig. 3, an embodiment of the present invention provides a method for configuring a PUSCH DMRS, which is applied to a network side device, and the method includes:

step 31: transmitting configuration information of DMRS position sets through RRC signaling, wherein each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission.

In the embodiment of the present invention, the configuration information of the DMRS position set sent by the network side device may be the DMRS position subset itself in the DMRS position set, or may also be identification information representing the DMRS position subset in the DMRS position set.

The following illustrates the concept of DMRS location subsets. Referring to table 1, the DMRS positions in each cell in table 1 are referred to as a DMRS position subset, where, for example, when the mapping type is a, the total number of the additional DMRSs is 1, and the number of symbols included in the PUSCH is 9, the corresponding DMRS position subset is l₀,7. In an embodiment of the invention, the subset of DMRS locations comprises at least one DMRS location.

A column of DMRS position subsets corresponding to the total number of the same additional DMRSs constitute one DMRS position set. For example, when the mapping type in table 1 is B and the total number of the additional DMRSs is 3, a corresponding column of DMRS position subsets (0,3,6,9), (0,3,6,9) form one DMRS position set. That is, the DMRS position set is for the total number of one additional DMRS, and the total number of one additional DMRS corresponds to one DMRS position set.

The following illustrates the concept of DMRS parameter set. The DMRS parameter set includes DMRS parameters, which include: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission. Referring to table 1, DMRS includes symbols of 1, a mapping type is a, the total number of additional DMRSs is 2, and PUSCH includes symbols of 14, which constitute a DMRS parameter set, and numbers of DMRS positions in DMRS position subsets corresponding to the DMRS parameter set are l₀,7,11。

In the embodiment of the invention, each DMRS parameter set corresponds to a DMRS position subset, and the DMRS position subsets corresponding to different DMRS parameter sets can be the same or different. At least one DMRS parameter is different in different DMRS parameter sets.

Because the network side equipment sends the DMRS position set to the terminal through the RRC signaling, when the terminal receives the DMRS configuration related information indicated by the DCI, the terminal can select the DMRS position subset corresponding to the DMRS configuration related information from a plurality of DMRS positions received from the network side, so that the problem that in the prior art, the total number of extra DMRS configured by the RRC signaling is not matched with the DMRS configuration related information indicated by the DCI is solved, the DMRS demodulation performance is improved, and the data transmission rate is further improved.

In the embodiment of the invention, in the DMRS position set sent by the network side equipment through RRC signaling, each PUSCH mapping type comprises one DMRS position set.

In this embodiment of the present invention, the step of sending the configuration information of the DMRS position set through RRC signaling may include:

when the DMRS parameter set comprises the number of symbols contained in the DMRS and the value is 2, respectively transmitting a DMRS position set corresponding to the number of symbols contained in the DMRS, which is 1, and a DMRS position set corresponding to the number of symbols contained in the DMRS, which is 2, or jointly transmitting the DMRS position set corresponding to the number of symbols contained in the DMRS, which is 1, and the DMRS position set corresponding to the number of symbols contained in the DMRS, which is 2; and/or

And when the DMRS parameter group comprises whether the PUSCH adopts frequency hopping transmission or not and the PUSCH adopts frequency hopping transmission, respectively sending a DMRS position set corresponding to the PUSCH adopting frequency hopping transmission and a DMRS position set corresponding to the PUSCH not adopting frequency hopping transmission, or jointly sending the DMRS position set corresponding to the PUSCH adopting frequency hopping transmission and the DMRS position set corresponding to the PUSCH not adopting frequency hopping transmission.

In some preferred embodiments of the present invention, when the PUSCH does not employ frequency hopping transmission, the mapping type is B, and the number of symbols included in the PUSCH is 14, the set of DMRS positions corresponding to the mapping type B is the same as the set of DMRS positions corresponding to the mapping type a.

Referring to table 5, table 5 shows DMRS positions when the number of symbols included in the DMRS is 1, the PUSCH does not use frequency hopping transmission, and the number of symbols included in the PUSCH is 14, and it can be seen from table 5 that the set of DMRS positions corresponding to mapping type B is the same as the set of DMRS positions corresponding to mapping type a.

TABLE 5

The DMRS location subset in table 5 above includes:

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is B, the total number of the additional DMRS is 2, the number of symbols contained in the PUSCH is 14, the PUSCH does not adopt frequency hopping transmission, and the numbers of the DMRS positions in the corresponding DMRS position subsets are 0, 6 and 12 respectively;

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is B, the total number of the additional DMRS is 3, the number of symbols contained in the PUSCH is 14, the PUSCH does not adopt frequency hopping transmission, and the numbers of the DMRS positions in the corresponding DMRS position subsets are 0, 4, 8 and 12 respectively.

The DMRS position subsets are not specified in the existing protocol, and in the implementation of the invention, the DMRS position subsets are added, so that the DMRS position sets are perfected.

Referring to table 6, table 6 shows DMRS positions when the number of symbols included in the DMRS is 2, the PUSCH does not use frequency hopping transmission, and the number of symbols included in the PUSCH is 14, and it can be seen from table 6 that the set of DMRS positions corresponding to mapping type B is the same as the set of DMRS positions corresponding to mapping type a.

TABLE 6

In some preferred embodiments of the present invention, when the PUSCH does not employ frequency hopping transmission, the mapping type is B, and the number of symbols included in the PUSCH is 14, the set of DMRS positions corresponding to mapping type B is different from the set of DMRS positions corresponding to mapping type a.

Referring to table 7, table 7 shows DMRS positions when the number of symbols included in the DMRS is 1, the PUSCH does not use frequency hopping transmission, and the number of symbols included in the PUSCH is 14, and it can be seen from table 7 that a set of DMRS positions corresponding to mapping type B is different from a set of DMRS positions corresponding to mapping type a.

TABLE 7

In some preferred embodiments of the present invention, when the DMRS parameter set comprises: when PUSCH adopts frequency hopping transmission, the DMRS positions are as follows:

referring to table 8, table 8 shows the positions of DMRSs when DMRSs includes 1 symbols and PUSCH is transmitted using frequency hopping.

TABLE 8

Wherein l₀Can be configured to be 0 or 2 or 3 if the position l of the 2 nd DMRS₀And +4 is greater than or equal to the position of the 3 rd DMRS symbol corresponding to the number of symbols contained in the corresponding PUSCH, the 2 nd DMRS is not transmitted.

Referring to table 9, table 9 shows the positions of DMRSs when DMRSs includes 2 symbols and PUSCH is transmitted using frequency hopping.

TABLE 9

In some preferred embodiments of the invention, at least one of the following subsets of DMRS locations is not included in the set of DMRS locations:

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is A or B, the total number of the additional DMRS is not equal to 0, the number of symbols contained in the PUSCH is less than or equal to 10, and the PUSCH adopts frequency hopping transmission and a corresponding DMRS position subset;

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is A or B, the total number of the additional DMRS is 0 or 1 or 2 or 3, the PUSCH adopts frequency hopping transmission, the number of symbols contained in the DMRS is 1, the number of symbols contained in the PUSCH is less than or equal to 3, the PUSCH adopts frequency hopping transmission, and the corresponding position subset of the DMRS is obtained;

the number of symbols contained in the DMRS is 2, the mapping type of the PUSCH is A or B, the total number of the additional DMRSs is 0 or 1 or 2 or 3, the PUSCH adopts frequency hopping transmission, the number of symbols contained in the DMRS is 2, the number of symbols contained in the PUSCH is less than or equal to 11, the PUSCH adopts frequency hopping transmission, and the corresponding position subset of the DMRS.

The DMRS parameter set corresponding to the DMRS position subset does not exist, and therefore, the DMRS parameter set does not need to be added, otherwise, the system throughput may be reduced.

In the embodiment of the present invention, the DMRS is PDSCH DMRS.

Referring to fig. 4, an embodiment of the present invention provides an PDSCH DMRS mapping method applied to a network device, including:

step 41: transmitting configuration information of DMRS position sets through RRC signaling, wherein each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained by the DMRS, the PDSCH mapping type, the total number of additional DMRSs, and the number of symbols contained by the PDSCH.

The following illustrates the concept of DMRS location subsets. Referring to table 3, the DMRS positions in each square in table 3 are referred to as a DMRS position subset, where, for example, when the mapping type is a, the total number of the additional DMRSs is 1, and the number of symbols included in the PUSCH is 9, the corresponding DMRS position subset is l₀,7. In an embodiment of the invention, the DMRS location subset comprisesOne less DMRS location.

A column of DMRS position subsets corresponding to the total number of the same additional DMRSs constitute one DMRS position set. For example, when the mapping type in table 3 is a and the total number of additional DMRSs is 1, a corresponding column of DMRS position subsets (l)₀,7)、(l₀,9)、(l₀,9)、(l₀,9)、(l₀,11)、(l₀And 11), one set of DMRS positions is formed. That is, the DMRS position set is for the total number of one additional DMRS, and the total number of one additional DMRS corresponds to one DMRS position set.

The following illustrates the concept of DMRS parameter set. The DMRS parameter set comprises DMRS parameters which comprise: the number of symbols contained in the DMRS, the PUSCH mapping type, the total number of additional DMRSs, and the number of symbols contained in the PUSCH. Referring to table 3, DMRS includes symbols of 1, a mapping type is a, the total number of additional DMRSs is 2, and PUSCH includes symbols of 14, which constitute a DMRS parameter set, and numbers of DMRS positions in DMRS position subsets corresponding to the DMRS parameter set are l₀,7,11。

In the embodiment of the invention, in the DMRS position set sent by the network side equipment through RRC signaling, each PDSCH mapping type comprises one DMRS position set.

and when the number of symbols contained in the DMRS parameter group is 2, respectively transmitting a DMRS position set corresponding to the number of symbols contained in the DMRS, which is 1, and a DMRS position set corresponding to the number of symbols contained in the DMRS, which is 2, or jointly transmitting the DMRS position set corresponding to the number of symbols contained in the DMRS, which is 1, and the DMRS position set corresponding to the number of symbols contained in the DMRS, which is 2.

In some preferred embodiments of the present invention, when the mapping type is B and the number of symbols included in the PDSCH is 14, the set of DMRS positions corresponding to mapping type B is the same as the set of DMRS positions corresponding to mapping type a.

Referring to table 10, table 10 shows DMRS positions when the number of symbols included in the DMRS is 1, the PDSCH does not use frequency hopping transmission, and the number of symbols included in the PDSCH is 14, and it can be seen from table 10 that the set of DMRS positions corresponding to mapping type B is the same as the set of DMRS positions corresponding to mapping type a.

Watch 10

The DMRS location subset in table 10 above includes:

the number of symbols contained in the DMRS is 1, the mapping type of the PDSCH is B, the total number of the additional DMRS is 2, the number of symbols contained in the PDSCH is 14, and the numbers of the DMRS positions in the corresponding DMRS position subsets are 0, 6 and 12 respectively;

the number of symbols contained in the DMRS is 1, the PDSCH mapping type is B, the total number of the additional DMRS is 3, the number of symbols contained in the PDSCH is 14, and the numbers of the DMRS positions in the corresponding DMRS position subsets are 0, 4, 8 and 12 respectively.

Referring to table 11, table 11 shows DMRS positions when the number of symbols included in the DMRS is 2 and the number of symbols included in the PDSCH is 14, and it can be seen from table 11 that the set of DMRS positions corresponding to mapping type B is the same as the set of DMRS positions corresponding to mapping type a.

TABLE 11

In some preferred embodiments of the present invention, when the mapping type is B and the number of symbols included in the PDSCH is 14, the set of DMRS positions corresponding to mapping type B is different from the set of DMRS positions corresponding to mapping type a.

Referring to table 12, table 12 shows DMRS positions when the number of symbols included in the DMRS is 1 and the number of symbols included in the PDSCH is 14, and it can be seen from table 11 that the set of DMRS positions corresponding to mapping type B is different from the set of DMRS positions corresponding to mapping type a.

TABLE 12

The above embodiment describes a method for arranging DMRSs on the network side, and the following description describes a method for transmitting DMRSs on the terminal side.

The DMRS in the embodiment of the present invention may be a PUSCH DMRS, or a PDSCH DMRS, and the transmission methods of the PUSCH DMRS and PDSCH DMRS are described in sequence below.

In the embodiment of the invention, the DMRS is a PUSCH DMRS.

Referring to fig. 5, an embodiment of the present invention provides a method for sending a PUSCH DMRS, which is applied to a terminal, and includes:

step 51: acquiring DMRS configuration related information indicated in the DCI, wherein the DMRS configuration related information at least comprises the number of symbols contained in a PUSCH;

step 52: selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

step 53: and transmitting the DMRS in the DMRS position subset corresponding to the configuration related information.

In the embodiment of the invention, the terminal acquires the DMRS configuration related information indicated in the DCI and selects the DMRS position corresponding to the DMRS configuration related information from a network side receiving or predefined DMRS position set, thereby solving the problem that the total number of the extra DMRS configured by the RRC signaling is not matched with the DMRS configuration related information indicated by the DCI in the prior art, improving the DMRS demodulation performance and further improving the data transmission rate.

In the embodiment of the present invention, the DMRS configuration related information further includes at least one of a PUSCH mapping type, a symbol number included in the DMRS, and whether the PUSCH employs frequency hopping transmission. That is, the network side may indicate at least one of a PUSCH mapping type, a number of symbols included in a DMRS, and whether a PUSCH employs frequency hopping transmission, in addition to dynamically indicating the number of symbols included in a PUSCH through DCI, thereby implementing more flexible DMRS configuration.

In the above embodiments, it is mentioned that the terminal may select, from a DMRS position set received or predefined by the network side, a DMRS position subset corresponding to the DMRS configuration related information, that is, the DMRS position set may be configured by the network side or predefined by a protocol, and the two manners are described in detail below.

In embodiments where the set of DMRS locations is predefined by the protocol, the protocol may define the locations of the DMRSs as in tables 1 and 2.

Compared with the position of DMRS defined in the protocol in the prior art, in the embodiment of the present invention, the following DMRS position subsets may be additionally specified in the protocol:

In some preferred embodiments of the present invention, at least one of the following DMRS location subsets may also not be included in the protocol-agreed DMRS location set:

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is A or B, the total number of the additional DMRSs is 0 or 1 or 2 or 3, the PUSCH adopts frequency hopping transmission, the number of symbols contained in the DMRS is 1, the number of symbols contained in the PUSCH is less than or equal to 3, the PUSCH adopts frequency hopping transmission, and the corresponding position subset of the DMRS is obtained;

In an embodiment where the network side pre-transmits the DMRS position set, before the step of selecting the DMRS position subset corresponding to the DMRS configuration related information in the DMRS position set received from the network side, the method further includes: and receiving the DMRS position set sent by the network side through RRC signaling.

Similarly, the DMRS position set transmitted by the network side may include the following DMRS position subsets:

In some preferred embodiments of the present invention, the DMRS position set sent by the network side may further not include at least one of the following DMRS position subsets:

In the embodiment of the present invention, the DMRS is PDSCH DMRS.

Referring to fig. 6, an embodiment of the present invention provides a method for transmitting PDSCH DMRS, applied to a terminal, including:

step 61: acquiring DMRS configuration related information indicated in the DCI, wherein the DMRS configuration related information at least comprises symbol numbers contained in a PDSCH;

step 62: selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received or predefined by a network side; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PDSCH of the physical downlink shared channel, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

and step 63: and receiving the DMRS at the DMRS position corresponding to the configuration related information.

In this embodiment of the present invention, the DMRS configuration related information further includes at least one of a PDSCH mapping type and a number of symbols included in the DMRS. That is to say, the network side may indicate at least one of a PDSCH mapping type and a DMRS-included symbol number, in addition to dynamically indicating the number of symbols included in the PDSCH through the DCI, thereby implementing more flexible DMRS configuration.

In the above embodiments, it is mentioned that the terminal may select, from a DMRS position set received or predefined by the network side, a DMRS position subset corresponding to the DMRS configuration related information, that is, information of the DMRS position set may be configured by the network side or predefined by a protocol, and the two manners are described in detail below.

In embodiments where the set of DMRS locations is predefined by the protocol, the protocol may specify the locations of the DMRSs as in tables 3 and 4.

Compared with the position of the DMRS specified in the protocol in the prior art, in the embodiment of the present invention, the following DMRS position subsets may be additionally specified in the protocol:

In the embodiment of the invention, network side equipment sends at least one DMRS position set corresponding to a PDSCH mapping type through RRC signaling, wherein each PDSCH mapping type comprises one DMRS position set.

The methods in the above embodiments may be applied to an LTE system, a 5G system, or to other future mobile communication systems.

In a specific embodiment, a network side configures a DMRS location set through RRC signaling, where the DMRS location set includes: the number of symbols included in the DMRS is 1, the PDSCH employs a mapping type a or B, the total number of the additional DMRSs is 3, the number of symbols included in the PDSCH is 1 to 14, the starting position of the first DMRS is 2, and the corresponding DMRS position subset is as shown in table 13 as follows:

watch 13

When the network side indicates that the number of symbols contained in the PDSCH is 14 through the DCI, the terminal determines that the DMRS position subset corresponding to the PDSCH with the number of symbols of 14 is (2,5,8,11) according to the DMRS position set transmitted by the RRC.

When the network side indicates that the number of symbols contained in the PDSCH is 10 through the DCI, the terminal determines that a DMRS position subset corresponding to the PDSCH with the number of symbols of 14 is (2,6,9) according to a DMRS position set transmitted by RRC.

In this embodiment, through configuring, by the RRC, DMRS position subsets corresponding to the number of symbols included in different PDSCHs, when the DCI changes the number of symbols included in the PDSCH, the DMRS position subsets may be adaptively changed, and DMRS demodulation performance may be improved.

In a specific embodiment, a network side configures a DMRS location set through RRC signaling, where the DMRS location set includes: the number of symbols included in the DMRS is 2, the PDSCH employs a mapping type a or B, the total number of additional DMRS is 1, the number of symbols included in the PDSCH is 1 to 14, the starting position of the first DMRS is the DMRS position subset corresponding to 2, as shown in table 14, as follows:

TABLE 14

When the network side indicates that the number of symbols contained in the PDSCH is 14 through the DCI, the terminal determines that the DMRS position subset corresponding to the PDSCH with the number of symbols of 14 is (2,10) according to the DMRS position set transmitted by the RRC.

When the network side indicates that the number of symbols contained in the PDSCH is 10 through the DCI, the terminal determines that a DMRS position subset corresponding to the PDSCH, wherein the number of symbols contained in the PDSCH is 14, is (2, 9) according to the DMRS position set transmitted by the RRC.

In this embodiment, the RRC configures the DMRS position subsets corresponding to the number of symbols included in different PDSCHs, so that the DMRS position subsets can be adaptively changed when the DCI changes the number of symbols included in the PDSCH, thereby improving DMRS demodulation performance.

In addition, in the embodiment of the present invention, a DMRS position set corresponding to a symbol number 1 included in a DMRS and a DMRS position set corresponding to a symbol number 2 included in the DMRS are jointly transmitted.

In a specific embodiment, in the embodiment of the present invention, for the PDSCH mapping type B, the method for determining the location of the PUSCH DMRS in the embodiment of the present invention is used for determination. Namely, obtaining DMRS configuration related information indicated in the DCI; selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received or predefined by a network side; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained by the DMRS, the PUSCH mapping type, the total number of additional DMRSs, and the number of symbols contained by the PDSCH.

For the PDSCH mapping type A, determining the position of the PUSCH DMRS by adopting one of the following schemes:

the UE does not expect that the number of symbols contained in the PDSCH/PUSCH scheduled by the network side is smaller than the minimum value of the number of symbols contained in the PDSCH/PUSCH corresponding to the total number of the extra DMRS configured by the high layer; or

When the number of symbols contained in the PDSCH/PUSCH is less than the minimum value of the number of symbols contained in the PDSCH/PUSCH corresponding to the total number of the extra DMRS configured by the high layer, the UE subtracts one from the total number of the extra DMRS configured by the high layer; or

And when the number of symbols contained in the PDSCH/PUSCH is less than the minimum value of the number of symbols contained in the PDSCH/PUSCH corresponding to the total number of the extra DMRS configured by the higher layer, the DMRS still transmits by adopting the position of the DMRS corresponding to the total number of the extra DMRS configured by the higher layer, and the DMRS which is not in the range of the number of symbols contained in the PDSCH/PUSCH is discarded.

Referring to fig. 7, an embodiment of the present invention further provides a network side device 70, including:

a transmitting module 71, configured to transmit configuration information of DMRS position sets of a demodulation reference signal through RRC signaling, where each DMRS position set includes a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission.

Preferably, in the DMRS position set sent by the network side device 70, each PUSCH mapping type includes one DMRS position set.

Preferably, the transmitting module is configured to, when the DMRS parameter set includes the number of symbols included in the DMRS and a value is 2, respectively transmit a DMRS position set corresponding to the DMRS and including the number of symbols 1 and a DMRS position set corresponding to the number of symbols included in the DMRS and including the number of symbols 2, or jointly transmit the DMRS position set corresponding to the DMRS and including the number of symbols 1 and the DMRS position set corresponding to the number of symbols included in the DMRS and including the number of symbols 2; and/or

The sending module 71 is configured to, when the DMRS parameter group includes that whether the PUSCH employs frequency hopping transmission or not, and the PUSCH employs frequency hopping transmission, send the DMRS position set corresponding to the PUSCH employing frequency hopping transmission and the DMRS position set corresponding to the PUSCH not employing frequency hopping transmission, or jointly send the DMRS position set corresponding to the PUSCH employing frequency hopping transmission and the DMRS position set corresponding to the PUSCH not employing frequency hopping transmission.

Preferably, the set of DMRS locations includes the following DMRS location subsets:

Preferably, at least one of the following DMRS location subsets is not included in the set of DMRS locations:

The network side device provided by the embodiment of the present invention can implement each process implemented by the network side device in the configuration method embodiment of the PUSCH DMRS, and is not described here again to avoid repetition.

Referring to fig. 8, an embodiment of the present invention further provides a network side device 80, including:

a sending module 81, configured to send configuration information of a demodulation reference signal DMRS position set through RRC signaling, where each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained by the DMRS, the PDSCH mapping type, the total number of additional DMRSs, and the number of symbols contained by the PDSCH.

Preferably, in the DMRS position set sent by the network side device 80, each PDSCH mapping type includes one DMRS position set.

Preferably, the transmitting module 81 is configured to, when the number of symbols included in the DMRS is included in the DMRS parameter set and the value is 2, respectively transmit a DMRS position set corresponding to the DMRS and having the number of symbols included in the DMRS of 1 and a DMRS position set corresponding to the DMRS and having the number of symbols included in the DMRS of 2, or jointly transmit the DMRS position set corresponding to the DMRS and having the number of symbols included in the DMRS of 1 and the DMRS position set corresponding to the DMRS and having the number of symbols included in the DMRS of 2.

the number of symbols contained in the DMRS is 1, the mapping type of the PDSCH is B, the total number of the additional DMRS is 2, the number of symbols contained in the PDSCH is 14, and the numbers of DMRS positions in the corresponding DMRS position subsets are 0, 6 and 12 respectively;

the number of symbols contained in the DMRS is 1, the PDSCH mapping type is B, the total number of the additional DMRS is 3, the number of symbols contained in the PDSCH is 14, and the numbers of DMRS positions in the corresponding DMRS position subsets are 0, 4, 8 and 12 respectively.

The network side device provided in the embodiment of the present invention can implement each process implemented by the network side device in the configuration method embodiment of PDSCH DMRS, and for avoiding repetition, details are not described here.

Referring to fig. 9, an embodiment of the present invention further provides a terminal 90, including:

an obtaining module 91, configured to obtain DMRS configuration related information of a demodulation reference signal indicated in the DCI, where the DMRS configuration related information at least includes a number of symbols included in a physical uplink shared channel, PUSCH;

a selecting module 92, configured to select a DMRS location subset corresponding to the DMRS configuration related information from a DMRS location set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

a transmitting module 93, configured to transmit the DMRS in the DMRS position subset corresponding to the configuration related information.

Preferably, the DMRS configuration related information further includes at least one of a PUSCH mapping type, a number of symbols included in the DMRS, and whether or not the PUSCH employs frequency hopping transmission.

Preferably, the terminal 90 further comprises:

a receiving module 94, configured to receive the DMRS location set sent by the network side through radio resource control RRC signaling.

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the sending method embodiment of the PUSCH DMRS, and is not described here again to avoid repetition.

Referring to fig. 11, an embodiment of the present invention further provides a terminal 100, including:

an obtaining module 101, configured to obtain DMRS configuration related information indicated in the DCI, where the DMRS configuration related information at least includes a symbol number included in a physical uplink shared channel PDSCH;

a selecting module 102, configured to select a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received or predefined by a network; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the PDSCH mapping type, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

a first receiving module 103, configured to receive the DMRS at the DMRS position corresponding to the configuration related information.

Preferably, the DMRS configuration related information further includes at least one of a PDSCH mapping type and a number of symbols included in the DMRS.

Preferably, referring to fig. 12, the terminal 100 further includes: a second receiving module 104, configured to receive the DMRS location set sent by the network side through radio resource control RRC signaling.

The terminal provided in the embodiment of the present invention can implement each process implemented by the terminal in the receiving method embodiment of PDSCH DMRS, and for avoiding repetition, details are not described here again.

The embodiment of the present invention further provides a network side device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is executed by the processor to implement the steps of the above-mentioned PUSCH DMRS configuration method, or the computer program is executed by the processor to implement the steps of the above-mentioned PDSCH DMRS configuration method.

The embodiment of the present invention further provides a terminal, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the method for transmitting the PUSCH DMRS, or the computer program, when executed by the processor, implements the steps of the method for receiving the PUSCH DMRS PDSCH DMRS.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and the computer program, when executed by the processor, implements the steps of the above-mentioned puschmrs configuration method, or the computer program, when executed by the processor, implements the steps of the above-mentioned PDSCH DMRS configuration method; alternatively, the computer program realizes the steps of the transmission method for PUSCH DMRS described above when executed by the processor, or realizes the steps of the reception method PDSCH DMRS described above when executed by the processor.

The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 11 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention, where the terminal 110 includes, but is not limited to: radio frequency unit 111, network module 112, audio output unit 113, input unit 114, sensor 115, display unit 116, user input unit 117, interface unit 118, memory 119, processor 1110, and power supply 1111. Those skilled in the art will appreciate that the terminal configuration shown in fig. 1 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The processor 1110 is configured to acquire DMRS configuration related information indicated in downlink control information DCI, where the DMRS configuration related information at least includes a number of symbols included in a physical uplink shared channel PUSCH; selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received or predefined by a network side; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

a radio frequency unit 111, configured to perform DMRS transmission in the DMRS position subset corresponding to the configuration related information.

Or, the processor 1110 is configured to acquire DMRS configuration related information indicated in the downlink control information DCI, where the DMRS configuration related information at least includes a symbol number included in the physical uplink shared channel PDSCH; selecting a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received or predefined by a network side; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the PDSCH mapping type, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

a radio frequency unit 111, configured to receive the DMRS at the DMRS position corresponding to the configuration related information.

In the embodiment of the invention, the terminal can select the DMRS position subset corresponding to the DMRS configuration related information indicated in the DCI through receiving or predefining the DMRS position set from the network side, so that the problem that the total number of the extra DMRS configured by the RRC signaling and the DMRS configuration related information indicated by the DCI are not matched in the prior art is solved, and the DMRS demodulation performance is improved.

It should be understood that, in the embodiment of the present invention, the rf unit 111 may be used for receiving and sending signals during a message transmission or call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 1110; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 111 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 111 may also communicate with a network and other devices through a wireless communication system.

The terminal provides the user with wireless broadband internet access via the network module 112, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 113 may convert audio data received by the radio frequency unit 111 or the network module 112 or stored in the memory 119 into an audio signal and output as sound. Also, the audio output unit 113 may also provide audio output related to a specific function performed by the terminal 110 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 113 includes a speaker, a buzzer, a receiver, and the like.

The input unit 114 is used to receive an audio or video signal. The input Unit 114 may include a Graphics Processing Unit (GPU) 1141 and a microphone 1142, and the Graphics processor 1141 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 116. The image frames processed by the graphic processor 1141 may be stored in the memory 119 (or other storage medium) or transmitted via the radio frequency unit 111 or the network module 112. The microphone 1142 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 111 in case of the phone call mode.

The terminal 110 also includes at least one sensor 115, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 1161 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1161 and/or backlight when the terminal 110 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 115 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 116 is used to display information input by the user or information provided to the user. The Display unit 116 may include a Display panel 1161, and the Display panel 1161 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 117 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 117 includes a touch panel 1171 and other input devices 1172. Touch panel 1171, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., user operations on or near touch panel 1171 using a finger, stylus, or any suitable object or accessory). Touch panel 1171 can include two portions, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 1110, and receives and executes commands sent from the processor 1110. In addition, the touch panel 1171 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1171, the user input unit 117 may also include other input devices 1172. Specifically, the other input devices 1172 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein.

Further, touch panel 1171 can be overlaid on display panel 1161, and when touch panel 1171 detects a touch operation thereon or nearby, the touch operation can be transmitted to processor 1110 to determine the type of touch event, and then processor 1110 can provide a corresponding visual output on display panel 1161 according to the type of touch event. Although in fig. 11, the touch panel 1171 and the display panel 1161 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 1171 and the display panel 1161 may be integrated to implement the input and output functions of the terminal, and the implementation is not limited herein.

The interface unit 118 is an interface for connecting an external device to the terminal 110. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 118 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 110 or may be used to transmit data between the terminal 110 and the external device.

The memory 119 may be used to store software programs as well as various data. The memory 119 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 119 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1110 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 119 and calling data stored in the memory 119, thereby performing overall monitoring of the terminal. Processor 1110 may include one or more processing units; preferably, the processor 1110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 1110.

The terminal 110 may further include a power supply 1111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 1111 may be logically connected to the processor 1110 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.

In addition, the terminal 110 includes some functional modules that are not shown, and are not described in detail herein.

The terminal in the embodiments of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a terminal such as a mobile telephone (or "cellular" telephone) and a computer having a terminal, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange languages and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User Device or User Equipment), which are not limited herein.

The network side device in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), may also be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may also be an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, or a relay Station or Access point, or a Base Station in a future 5G network, and the like, which is not limited herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for configuring a Physical Uplink Shared Channel (PUSCH) demodulation reference signal (DMRS) is applied to network side equipment, and is characterized by comprising the following steps:

transmitting configuration information of DMRS position sets through Radio Resource Control (RRC) signaling, wherein each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of the PUSCH, the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission;

the step of transmitting the configuration information of the DMRS location set through RRC signaling includes:

2. The method of configuration of claim 1, wherein each PUSCH mapping type comprises a set of DMRS locations.

3. The configuration method according to claim 1,

the set of DMRS positions comprises the following DMRS position subsets:

4. The configuration method according to claim 1,

at least one of the following subsets of DMRS locations is excluded from the set of DMRS locations:

the number of symbols contained in the DMRS is 1, the mapping type of the PUSCH is A or B, the total number of the additional DMRS is 0 or 1 or 2 or 3, the number of symbols contained in the PUSCH is less than or equal to 3, the PUSCH adopts frequency hopping transmission, and the corresponding position subset of the DMRS is obtained;

the number of symbols contained in the DMRS is 2, the mapping type of the PUSCH is A or B, the total number of the additional DMRS is 0 or 1 or 2 or 3, the number of symbols contained in the PUSCH is less than or equal to 11, and the PUSCH adopts frequency hopping transmission and the corresponding position subset of the DMRS.

5. A method for configuring a demodulation reference signal (DMRS) of a Physical Downlink Shared Channel (PDSCH) is applied to network side equipment, and is characterized by comprising the following steps:

transmitting configuration information of DMRS position sets through Radio Resource Control (RRC) signaling, wherein each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the PDSCH mapping type, the total number of the additional DMRS and the number of symbols contained in the PDSCH;

6. The method of configuration of claim 5, wherein each PDSCH mapping type comprises one set of DMRS locations.

7. The configuration method according to claim 5,

the set of DMRS positions comprises the following DMRS position subsets:

8. A method for sending a Physical Uplink Shared Channel (PUSCH) demodulation reference signal (DMRS) is applied to a terminal, and is characterized by comprising the following steps:

acquiring DMRS configuration related information indicated in downlink control information DCI, wherein the DMRS configuration related information at least comprises symbol number contained in a physical uplink shared channel PUSCH;

9. The transmission method of claim 8, wherein each PUSCH mapping type in the set of DMRS locations transmitted by the network side comprises a set of DMRS locations.

10. The transmission method of claim 8,

the DMRS configuration related information further comprises at least one of a PUSCH mapping type, the number of symbols contained in the DMRS and whether the PUSCH adopts frequency hopping transmission.

11. The transmission method according to claim 8, wherein, prior to the step of selecting the subset of DMRS positions corresponding to the DMRS configuration-related information from the set of DMRS positions received from the network side, the method further comprises:

and receiving the DMRS position set sent by the network side through Radio Resource Control (RRC) signaling.

12. A receiving method of a demodulation reference signal (DMRS) of a Physical Downlink Shared Channel (PDSCH) is applied to a terminal and is characterized by comprising the following steps:

acquiring DMRS configuration related information indicated in Downlink Control Information (DCI), wherein the DMRS configuration related information at least comprises symbol numbers contained in a physical uplink shared channel (PDSCH);

13. The receiving method of claim 12, wherein the set of DMRS locations transmitted by the network side comprises one set of DMRS locations per PDSCH mapping type.

14. The receiving method according to claim 12,

the DMRS configuration related information further includes at least one of a PDSCH mapping type and a number of symbols included in the DMRS.

15. The method for receiving a DMRS according to claim 12, wherein said step of selecting, from a set of DMRS positions received from a network side, a subset of DMRS positions corresponding to said DMRS configuration-related information is preceded by the step of:

16. A network-side device, comprising:

a sending module, configured to send configuration information of DMRS position sets of demodulation reference signals through radio resource control RRC signaling, where each DMRS position set includes a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of a Physical Uplink Shared Channel (PUSCH), the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission or not;

the sending module is configured to:

17. A network-side device, comprising:

a sending module, configured to send configuration information of a demodulation reference signal DMRS position set through radio resource control, RRC, signaling, where each DMRS position subset corresponds to one DMRS parameter group, and at least one of the following DMRS parameters in different DMRS parameter groups is different: the number of symbols contained in the DMRS, the mapping type of the PDSCH (physical downlink shared channel), the total number of the additional DMRS and the number of symbols contained in the PDSCH;

the sending module is configured to:

18. A terminal, comprising:

an obtaining module, configured to obtain DMRS configuration related information of a demodulation reference signal indicated in DCI, where the DMRS configuration related information at least includes a number of symbols included in a PUSCH;

a selection module, configured to select a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of a Physical Uplink Shared Channel (PUSCH), the total number of the additional DMRS, the number of symbols contained in the PUSCH and whether the PUSCH adopts frequency hopping transmission or not;

19. A terminal, comprising:

an obtaining module, configured to obtain DMRS configuration related information indicated in downlink control information DCI, where the DMRS configuration related information at least includes a number of symbols included in a physical uplink shared channel PDSCH;

a selection module, configured to select a DMRS position subset corresponding to the DMRS configuration related information from a DMRS position set received from a network side or predefined; each DMRS position set comprises a plurality of DMRS position subsets, each DMRS position subset corresponds to one DMRS parameter set, and at least one of the following DMRS parameters in different DMRS parameter sets is different: the number of symbols contained in the DMRS, the mapping type of the PDSCH (physical downlink shared channel), the total number of the additional DMRS and the number of symbols contained in the PDSCH;

20. A network side device, comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method for configuring PUSCH DMRS according to any one of claims 1 to 4; alternatively, the computer program when executed by the processor implements the steps of the configuration method of PDSCH DMRS of any of claims 5-7.

21. A terminal comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the computer program when executed by the processor implementing the steps of the method for transmitting PUSCH DMRS as defined in any one of claims 8 to 11, or the computer program when executed by the processor implementing the steps of the method for receiving PDSCH DMRS as defined in any one of claims 12 to 15.

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 the method for configuring PUSCH DMRS according to any one of claims 1 to 4; or the computer program when executed by a processor performs the steps of the configuration method of PDSCH DMRS of any of claims 5-7; alternatively, the computer program when executed by a processor implements the steps of the method for transmitting PUSCH DMRS according to any one of claims 8 to 11; alternatively, the computer program when executed by a processor implements the steps of the receiving method of PDSCH DMRS of any of claims 12 to 15.