CN109842471B

CN109842471B - Transmission method of demodulation reference signal DMRS, network equipment and terminal

Info

Publication number: CN109842471B
Application number: CN201711195004.XA
Authority: CN
Inventors: 孙晓东; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2021-06-29
Anticipated expiration: 2037-11-24
Also published as: CN109842471A

Abstract

The invention discloses a transmission method of a demodulation reference signal DMRS, network equipment and a terminal, wherein the method comprises the following steps: acquiring a scrambling code identifier of the DMRS; determining a DMRS to be transmitted according to the scrambling code identifier; acquiring a resource mapping granularity identifier for indicating the resource mapping granularity; and mapping the DMRS to be transmitted to the target transmission resource for transmission according to the resource mapping granularity. Wherein, the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB. According to the method, the network equipment or the terminal can determine the DMRS to be transmitted according to the acquired scrambling code identification of the DMRS, and map the DMRS to be transmitted to the target transmission resource for transmission according to the acquired resource mapping granularity, so that the DMRS to be transmitted is mapped to the RE group or the RB group, the detection performance of the DMRS can be improved, and the data transmission rate can be further improved.

Description

Transmission method of demodulation reference signal DMRS, network equipment and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a network device, and a terminal for transmitting a demodulation reference signal DMRS.

Background

In the fourth generation (4)^thGeneration, 4G) mobile communication system, or called Long Term Evolution (LTE) system, a downlink User Equipment (UE), or called a terminal, wherein a specific Demodulation Reference Signal (DMRS) adopts a Pseudo-random (PN) sequence, and a PN sequence is generated as follows:

wherein,

where c (n) denotes a Gold sequence of length 31, and n is 2m, or n is 2m +1, where m denotes a subcarrier number.

The UE-specific DMRS sequence is initialized regardless of the radio network temporary identity of the UE, but is related to Orthogonal Cover Code (OCC) used for Multi-User Multi-Input Multi-Output (MU-MIMO) transmission. The initialization mode of the UE-specific DMRS sequence is as follows:

wherein n is_sThe identification of the slot number is indicated,

denotes the physical cell identity, n_SCIDIndicating OCC identification employed by MU-MIMO.

Uplink MU-MIMO is also distinguished using different OCCs, as opposed to downlink types, with the difference that uplink DMRS uses Zadoff-Chu sequences. In addition, uplink and downlink DMRS mapping adopts a mapping mode of each resource element independently. In the LTE system, the maximum number of MU-MIMO users supported is 2, and in the fifth generation (5)^thGeneration, 4G) mobile communication system, or referred to as New Radio (NR) system, as more antennas can be deployed at the transmitting and receiving sides, the maximum number of MU-MIMO users will be more, and the maximum number of MU-MIMO antenna ports supported by each user will also be more. In addition, in the NR system, both the uplink and the downlink support Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms, and both the DMRSs of the uplink and the downlink may adopt PN sequences. Because the NR system needs to support multiple functions such as transmission of different users, different links, and multiple users, DMRS mapping methods of uplink and downlink in the LTE system are no longer applicable to the transmission scenario of the NR system, which results in a decrease in DMRS detection performance and an inability to guarantee data transmission rate.

Disclosure of Invention

The embodiment of the invention provides a method, network equipment and a terminal for transmitting a demodulation reference signal (DMRS), which aim to solve the problem of low transmission rate caused by low DMRS detection performance.

In a first aspect, an embodiment of the present invention provides a method for transmitting a demodulation reference signal DMRS, which is applied to a transmission node, and includes:

acquiring a scrambling code identifier of the DMRS;

determining a DMRS to be transmitted according to the scrambling code identifier;

acquiring a resource mapping granularity identifier for indicating the resource mapping granularity;

mapping the DMRS to be transmitted to target transmission resources for transmission according to the indicated resource mapping granularity; wherein, the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB.

In a second aspect, an embodiment of the present invention further provides a transmission node, including:

the first acquisition module is used for acquiring a scrambling code identifier of the DMRS;

the processing module is used for determining the DMRS to be transmitted according to the scrambling code identifier;

a second obtaining module, configured to obtain a resource mapping granularity identifier used for indicating a resource mapping granularity;

the transmission module is used for mapping the DMRS to be transmitted to the target transmission resource for transmission according to the indicated resource mapping granularity; wherein, the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB.

In a third aspect, an embodiment of the present invention provides a network device, where the network device includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and when the processor executes the computer program, the processor implements the steps of the transmission method for the demodulation reference signals DMRS.

In a fourth aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and being executable on the processor, and the computer program, when executed by the processor, implements the steps of the method for transmitting a demodulation reference signal DMRS.

In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the transmission method for a demodulation reference signal DMRS are implemented.

In this way, the network device or the terminal according to the embodiment of the present invention may determine the DMRS to be transmitted according to the obtained scrambling code identifier of the DMRS, and map the DMRS to be transmitted to the target transmission resource for transmission according to the obtained resource mapping granularity, so that the DMRS to be transmitted is mapped to the RE group or the RB group, which may improve detection performance of the DMRS, and further improve data transmission rate.

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 flowchart illustrating a method for transmitting a demodulation reference signal DMRS according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating resource mapping of DMRS to two REs in an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating resource mapping of DMRS to one RB in an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating resource mapping of DMRS to two RBs according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for transmitting a downlink DMRS on a network device side according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a terminal-side downlink DMRS transmission method according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a terminal-side uplink DMRS transmission method according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a method for transmitting an uplink DMRS on a network device side according to an embodiment of the present invention;

fig. 9 is a diagram illustrating one of downlink DMRS transmissions in an embodiment of the present invention;

fig. 10 is a diagram illustrating a second exemplary downlink DMRS transmission scheme according to an embodiment of the present invention;

fig. 11 is a third diagram illustrating downlink DMRS transmission according to an embodiment of the present invention;

fig. 12 is a fourth schematic diagram illustrating downlink DMRS transmission according to an embodiment of the present invention;

fig. 13 shows a fifth schematic diagram of downlink DMRS transmission in the embodiment of the present invention;

fig. 14 shows a sixth schematic diagram of downlink DMRS transmission in an embodiment of the present invention;

fig. 15 shows a seventh schematic diagram of downlink DMRS transmission in an embodiment of the present invention;

fig. 16 shows an eighth schematic diagram of downlink DMRS transmission in an embodiment of the present invention;

fig. 17 shows a ninth schematic diagram of downlink DMRS transmission in an embodiment of the present invention;

fig. 18 shows ten schematic diagrams of downlink DMRS transmission in an embodiment of the present invention;

fig. 19 is a diagram illustrating eleven downlink DMRS transmissions according to an embodiment of the present invention;

fig. 20 is a diagram illustrating a twelfth example of downlink DMRS transmission according to the embodiment of the present invention;

fig. 21 is a thirteen schematic diagram of downlink DMRS transmission in the embodiment of the present invention;

FIG. 22 is a block diagram of a transport node according to an embodiment of the present invention;

FIG. 23 is a block diagram of a network device of an embodiment of the present invention;

fig. 24 shows a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, 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.

As shown in fig. 1, the method for transmitting a demodulation reference signal DMRS according to the embodiment of the present invention is applied to a transmission node, and specifically includes the following steps:

step 11: and acquiring scrambling code identification of the DMRS.

The transmission node is a network device or a terminal, and the DMRS may be a downlink DMRS or an uplink DMRS. The scrambling code identity comprises at least one of the following information:

a first scrambling code identifier used for distinguishing DMRS ports or port groups of different terminals;

a second scrambling code identification for distinguishing DMRS ports or port groups of different beams (beams); and

a third scrambling code identification for distinguishing DMRS ports or port groups of different transceiving nodes (TRPs).

It is worth pointing out that the first scrambling code identifier, the second scrambling code identifier, and the third scrambling code identifier are respectively located in different indication fields, but values thereof may be the same.

Further, step 11 specifically includes the following:

when only multi-user multi-input multi-output MU-MIMO transmission is supported, acquiring a first scrambling code identifier; here, when the network device configures only MU-MIMO transmission, different users are distinguished by the first scrambling code identification.

When only multi-beam transmission is supported, acquiring a second scrambling code identifier; when the network device is configured with multi-beam transmission only, different beams are distinguished through the second scrambling code identification.

When only supporting multiple TRP transmission, acquiring a third scrambling code identification; when the network equipment only configures multi-TRP transmission, different TRPs are distinguished through the third scrambling code identification.

When MU-MIMO transmission and multi-beam transmission are simultaneously supported, acquiring a first scrambling code identifier and/or a second scrambling code identifier; when the network equipment configures MU-MIMO transmission and multi-beam transmission, different users can be directly distinguished by the first scrambling code identification. Or when one beam only corresponds to one user, different beams are distinguished through the second scrambling code identification, so that different users are further distinguished. Or, when a plurality of users are corresponding to one beam, different users are distinguished through the first scrambling code identifier, different beams are distinguished through the second scrambling code identifier, and therefore a user under a beam is distinguished.

When MU-MIMO transmission and multi-TRP transmission are simultaneously supported, a first scrambling code identifier and/or a third scrambling code identifier are/is acquired; when the network equipment configures MU-MIMO transmission and multi-TRP transmission, different users can be directly distinguished through the first scrambling code identification. Or, when one TRP corresponds to only one user, different TRPs are distinguished by the third scrambling code identifier, thereby further distinguishing different users. Or, when one TRP corresponds to a plurality of users, different users are distinguished by the first scrambling code identifier, and different TRPs are distinguished by the third scrambling code identifier, thereby distinguishing a certain user under a certain TRP.

When multi-beam transmission and multi-TRP transmission are simultaneously supported, a second scrambling code identifier and/or a third scrambling code identifier are/is obtained; when the network equipment configures multi-beam transmission and multi-TRP transmission, when one TRP only corresponds to one beam, different beams are distinguished through the second scrambling code identifier, or different TRPs are distinguished through the third scrambling code identifier. Or, when one TRP corresponds to a plurality of beams, different beams are distinguished by the second scrambling code identifier, and different TRPs are distinguished by the third scrambling code identifier.

When MU-MIMO transmission, multi-beam transmission and multi-TRP transmission are simultaneously supported, a first scrambling code identification, a second scrambling code identification and/or a third scrambling code identification are/is obtained. When the network equipment simultaneously configures MU-MIMO transmission, multi-beam transmission and multi-TRP transmission, when one TRP only comprises one beam and one beam only corresponds to one user, different users can be distinguished through the first scrambling code identifier, or different beams can be distinguished through the second scrambling code identifier, or different TRPs can be distinguished through the third scrambling code identifier. Or only one TRP is supported, wherein one TRP comprises a plurality of beams, one beam corresponds to a plurality of users, different users are distinguished through the first scrambling code identifier, and different beams are distinguished through the second identifier. Or, when one TRP includes a plurality of different beams, and one beam corresponds to one user, the different beams are distinguished by the second scrambling code identifier, and the different TRPs are distinguished by the third scrambling code identifier. Or, when one TRP includes one beam, one beam corresponds to a plurality of different users, and at the same time, the different users are distinguished by the first scrambling code identifier, and the different TRPs are distinguished by the third scrambling code identifier. Or, when one TRP includes a plurality of beams, one beam includes a plurality of different users, and at the same time, different users are distinguished by the first scrambling code identifier, different beams are distinguished by the second scrambling code identifier, and different TRPs are distinguished by the third scrambling code identifier.

Step 12: and determining the DMRS to be transmitted according to the scrambling code identifier.

Wherein, the step 12 can be realized by the following specific means: and initializing the DMRS according to the scrambling identifier to obtain the DMRS to be transmitted. Specifically, the scrambling code identifier is determined as an initialization factor of the DMRS sequence, and the initialization factor is substituted into the initialization formula of the DMRS to obtain the DMRS sequence to be transmitted. Alternatively, step 12 may be specifically implemented by: and scrambling the DMRS sequence according to the scrambling code sequence corresponding to the scrambling code identifier to obtain the DMRS sequence to be transmitted.

Step 13: and acquiring a resource mapping granularity identifier for indicating the resource mapping granularity.

Wherein, the resource mapping granularity is: resource Element (RE) groups or Resource Block (RB) groups, one RE group comprising at least one RE, in particular at least two REs, one RB group comprising at least one RB. It should be noted that, the execution sequence between step 12 and step 13 is not limited, and step 12 may be executed first and then step 13 may be executed, or step 13 may be executed first and then step 12 may be executed. Further, if step 13 is executed first and step 12 is executed second, the sequence between step 13 and step 11 is not limited, that is, step 11 may be executed first and step 13 is executed second, and step 13 may be executed first and step 11 is executed second.

Step 14: and mapping the DMRS to be transmitted to the target transmission resource for transmission according to the indicated resource mapping granularity.

Therefore, the DMRS to be transmitted is mapped to the RE group or the RB group according to the resource mapping granularity, the detection performance of the DMRS can be improved, and the data transmission rate is further improved.

Specifically, when the resource mapping granularity flag indicates that the resource mapping granularity is an RE group, specifically, as shown in fig. 2, the resource mapping granularity is an RE group consisting of 2 REs. Wherein DMRS1 is mapped to the upper frequency part of one RB and DMRS2 is mapped to the lower frequency part of the RB.

Specifically, when the resource mapping granularity indicator indicates that the resource mapping granularity is an RB group, specifically, as shown in fig. 3, the resource mapping granularity is an RB group consisting of 1 RB, wherein the DMRS1 is mapped to one RB and the DMRS2 is mapped to another RB. As shown in fig. 4, the resource mapping granularity is an RB group consisting of 2 RBs, wherein DMRS1 is mapped onto two consecutive RBs and DMRS2 is mapped onto the other two consecutive RBs. It should be noted that the DMRS1 and DMRS2 may be mapped by using a configuration type 1, or may be mapped by using a configuration type 2, where the mapping is performed by using a configuration type 1.

In the following, the embodiment further describes downlink DMRS transmission and uplink DMRS transmission in detail with reference to the accompanying drawings and specific application scenarios.

Scene one, downlink DMRS transmission

As shown in fig. 5, the DMRS transmission method according to the embodiment of the present invention is applied to a network device, and specifically includes the following steps:

step 51: and acquiring scrambling code identification of the DMRS.

Step 52: and transmitting the scrambling code identification to the terminal.

I.e. the scrambling code identity is sent to the terminal. Specifically, the network device may send the scrambling code identifier of the DMRS to the terminal through a higher layer signaling or Downlink Control Information (DCI).

Step 53: and determining the (downlink) DMRS to be transmitted according to the scrambling code identifier.

Step 54: and acquiring a resource mapping granularity identifier for indicating the resource mapping granularity.

Step 55: and sending the resource mapping granularity identification to the terminal.

That is, the resource mapping granularity identifier is sent to the terminal. Specifically, the network device may send the resource mapping granularity identifier to the terminal through a high-level signaling or downlink control information. It should be noted that, the execution sequence from step 52 to step 54 is not limited, if step 54 is executed first and step 53 is executed second, the sequence between step 54 and step 52 is not limited, that is, step 52 may be executed first and step 54 may be executed first, step 54 may be executed first and step 52 may be executed second, when step 54 is executed first and step 52 is executed second, the execution sequence between step 55 and step 52 is not limited, step 55 may be executed first and step 52 may be executed first, step 52 may be executed first and step 55 may be executed second, or step 52 and step 55 may be executed simultaneously. When step 52 and step 55 are executed simultaneously, the network device may send the scrambling code identifier and the resource mapping granularity identifier to the terminal through the same higher layer signaling or downlink control information.

Step 56: and mapping the (downlink) DMRS to be transmitted to the target transmission resource for transmission according to the resource mapping granularity.

Correspondingly, as shown in fig. 6, the DMRS transmission method according to the embodiment of the present invention is applied to a terminal, and specifically includes the following steps:

step 61: and receiving the scrambling code identification of the DMRS sent by the network equipment.

Specifically, the terminal receives a scrambling code identifier of the DMRS sent by the network device through the high-level signaling or the downlink control information.

Step 62: and receiving a resource mapping granularity identification which is sent by the network equipment and used for indicating the resource mapping granularity.

Specifically, the terminal receives a resource mapping granularity identifier indicating the resource mapping granularity, which is sent by the network device through a high-level signaling or downlink control information.

And step 63: and detecting corresponding (downlink) DMRS on the target transmission resource according to the scrambling code identification and the resource mapping granularity.

Scene two, uplink DMRS transmission

As shown in fig. 7, the DMRS transmission method according to the embodiment of the present invention is applied to a terminal, and specifically includes the following steps:

step 71: and receiving the scrambling code identification of the DMRS sent by the network equipment.

Step 72: and determining the (uplink) DMRS to be transmitted according to the scrambling code identifier.

Step 73: and receiving a resource mapping granularity identification which is sent by the network equipment and used for indicating the resource mapping granularity.

Specifically, the terminal receives a resource mapping granularity identifier indicating the resource mapping granularity, which is sent by the network device through a high-level signaling or downlink control information. It should be noted that the execution sequence between step 73 and step 72 is not limited.

Step 74: and mapping the (uplink) DMRS to be transmitted to the target transmission resource for transmission according to the resource mapping granularity.

Correspondingly, as shown in fig. 8, the DMRS transmission method according to the embodiment of the present invention is applied to a network device, and specifically includes the following steps:

step 81: and acquiring scrambling code identification of the DMRS.

Step 82: and transmitting the scrambling code identification to the terminal.

I.e. the scrambling code identity is sent to the terminal. Specifically, the network device may send the scrambling code identifier of the DMRS to the terminal through a higher layer signaling or downlink control information.

Step 83: and acquiring a resource mapping granularity identifier for indicating the resource mapping granularity.

Step 84: and sending the resource mapping granularity identification to the terminal.

Step 85: and the receiving terminal maps the (uplink) DMRS transmitted on the target transmission resource according to the scrambling code identification and the resource mapping granularity.

Further, taking downlink DMRS transmission as an example, when a network device is configured to support only MU-MIMO transmission, one network device only supports a single TRP, and the TRP only comprises a single beam, and the beam corresponds to a plurality of users (such as: 2). The network equipment sends a first scrambling code identifier to the terminal for distinguishing different users, wherein the first scrambling code identifier can be sent to the terminal through high-level signaling or DCI. As shown in fig. 9, the scrambling for user 1 is performed when the value of the first scrambling code identifier is (1, 1), and the scrambling for user 2 is performed when the value of the first scrambling code identifier is (1, -1).

When the network device is configured to support only multi-beam transmission, that is, one network device only supports a single TRP, one TRP includes a plurality of beams (e.g., 2), the plurality of beams all correspond to the same user, and the network device transmits a second scrambling code identifier to the terminal for distinguishing different beams. As shown in fig. 10, the scrambling for beam 1 is performed when the value of the second scrambling code identification is (1, 1), and the scrambling for beam 2 is performed when the value of the second scrambling code identification is (1, -1).

When the network equipment only supports multi-TRP transmission, namely one network equipment supports multi-TRP (such as: 2), one TRP comprises one beam, a plurality of TRPs correspond to the same user, and the network equipment sends a third scrambling code identifier to the terminal for distinguishing different TRPs. As shown in fig. 11, the scrambling for TRP1 when the value of the third scrambling code identity is (1, 1) and the scrambling for TRP2 when the value of the third scrambling code identity is (1, -1).

When the network device is configured to support both MU-MIMO transmission and multi-beam transmission, i.e. one network device supports a single TRP, one TRP comprises multiple beams (e.g. 2), one beam corresponding to at least one user. When one beam corresponds to one user, the network device may distinguish different users by directly distinguishing the first scrambling code identifier from the second scrambling code identifier. As shown in fig. 12, the scrambling for user 1 or beam 1 is performed when the value of the first scrambling code identification or the second scrambling code identification is (1, 1), and the scrambling for user 2 or beam 2 is performed when the value of the first scrambling code identification or the second scrambling code identification is (1, -1). When one beam corresponds to multiple users, the network device can simultaneously distinguish different users through the first scrambling code identifier and different beams through the second scrambling code identifier, that is, the network device performs joint scrambling through the first scrambling code identifier and the second scrambling code identifier. As shown in fig. 13, the combined value of the first scrambling code identifier and the second scrambling code identifier is (1, 1,1, 1) for user 1 under beam 1, and the combined value of the first scrambling code identifier and the second scrambling code identifier is (1, -1, -1, 1) for user 1 under beam 2; the combined value of the first scrambling code identity and the second scrambling code identity is (1, 1, -1, -1) for scrambling of user 2 in beam 1, and the combined value of the first scrambling code identity and the second scrambling code identity is (1, -1, 1, -1) for scrambling of user 2 in beam 2.

When the network device is configured to support MU-MIMO transmission and multiple TRP transmission simultaneously, i.e. one network device supports multiple TRPs (e.g. 2), one TRP includes one beam, and one beam corresponds to at least one user. When one beam corresponds to one user, the network device may distinguish different users by directly distinguishing the different users through the first scrambling code identifier, or distinguish different TRPs through the third scrambling code identifier. As shown in fig. 14, the scrambling for user 1 or TRP1 when the value of the first scrambling code identity or the third scrambling code identity is (1, 1), and the scrambling for user 2 or TRP2 when the value of the first scrambling code identity or the third scrambling code identity is (1, -1). When one beam corresponds to multiple users, the network device can simultaneously distinguish different users through the first scrambling code identifier and distinguish different TRPs through the third scrambling code identifier, that is, the network device performs joint scrambling through the first scrambling code identifier and the third scrambling code identifier. As shown in fig. 15, when the combined value of the first scrambling code identifier and the third scrambling code identifier is (1, 1,1, 1), the scrambling is used for user 1 under TRP1, and when the combined value of the first scrambling code identifier and the third scrambling code identifier is (1, 1, -1, -1), the scrambling is used for user 1 under TRP 2; the combined value of the first scrambling code identity and the third scrambling code identity is (1, -1, 1, -1) for user 2 under TRP1, and the combined value of the first scrambling code identity and the third scrambling code identity is (1, -1, -1, 1) for user 2 under TRP 2.

When the network device is configured to support multi-beam transmission and multi-TRP transmission simultaneously, that is, one network device supports multiple TRPs (e.g., 2), one TRP includes at least one beam, and one beam corresponds to one user. When one TRP includes one beam, the network device may distinguish between different TRPs by directly distinguishing between different beams by the second scrambling code identity or by the third scrambling code identity. As shown in fig. 16, the scrambling for the beam 1 or TRP1 when the value of the second scrambling code identity or the third scrambling code identity is (1, 1), and the scrambling for the beam 2 or TRP2 when the value of the second scrambling code identity or the third scrambling code identity is (1, -1). When one TRP includes a plurality of beams (e.g., 2), the network device can simultaneously distinguish different beams by the second scrambling code identifier and different TRPs by the third scrambling code identifier, i.e., the network device performs joint scrambling by the second scrambling code identifier and the third scrambling code identifier. As shown in fig. 17, the joint value of the second scrambling code identifier and the third scrambling code identifier is (1, 1,1, 1) for single user scrambling in beam 1 of TRP1, and the joint value of the second scrambling code identifier and the third scrambling code identifier is (1, 1, -1, -1) for single user scrambling in beam 1 of TRP 2; the combined value of the second scrambling code identity and the third scrambling code identity is (1, -1, 1, -1) for scrambling of a single user in beam 2 of TRP1, and the combined value of the second scrambling code identity and the third scrambling code identity is (1, -1, -1, 1) for scrambling of a single user in beam 2 of TRP 2.

When the network device is configured to simultaneously support MU-MIMO transmission, multi-beam transmission and multi-TRP transmission, i.e. one network device supports multiple TRPs, one TRP comprises at least one beam, and one beam corresponds to at least one user. When one TRP includes only one beam, one beam corresponds to only one user, different users may be distinguished by the first scrambling code identity or different beams may be distinguished by the second scrambling code identity or different TRPs may be distinguished by the third scrambling code identity. As shown in fig. 18, the scrambling for user 1 or beam 1 or TRP1 when the value of the first scrambling code identity or the second scrambling code identity or the third scrambling code identity is (1, 1), and the scrambling for user 2 or beam 2 or TRP2 when the value of the first scrambling code identity or the second scrambling code identity or the third scrambling code identity is (1, -1). When one TRP includes one beam, and one beam corresponds to multiple users (e.g. 2), different users can be distinguished by the first scrambling code identifier and different TRPs can be distinguished by the third scrambling code identifier at the same time, that is, the network device performs joint scrambling by the first scrambling code identifier and the third scrambling code identifier. As shown in fig. 19, the combined value of the first scrambling code identity and the third scrambling code identity is (1, 1,1, 1) for user 1 under a single beam (e.g. beam 1) of TRP1, and the combined value of the first scrambling code identity and the third scrambling code identity is (1, 1, -1, -1) for user 1 under a single beam (e.g. beam 2) of the second TRP; the combined value of the first scrambling code identity and the third scrambling code identity is (1, -1, 1, -1) for user 2 under a single beam of TRP1, and the combined value of the first scrambling code identity and the third scrambling code identity is (1, -1, -1, 1) for user 2 under a single beam of TRP 2. When one TRP includes multiple beams (e.g. 2), and one beam corresponds to only one user, different beams can be distinguished by the second scrambling code identifier and different TRPs can be distinguished by the third scrambling code identifier at the same time, i.e. the network device performs joint scrambling by the second scrambling code identifier and the third scrambling code identifier. As shown in fig. 20, the combined value of the second scrambling code identifier and the third scrambling code identifier is (1, 1,1, 1) for single user of beam 1 (e.g., user 1) under TRP1, and the combined value of the second scrambling code identifier and the third scrambling code identifier is (1, 1, -1, -1) for single user of beam 1 (e.g., user 1) of TRP 2; the combined value of the second and third scrambling code identities is (1, -1, 1, -1) for scrambling of a single user (e.g., user 2) in beam 2 of TRP1, and the combined value of the second and third scrambling code identities is (1, -1, -1, 1) for scrambling of a single user (e.g., user 2) in beam 2 of TRP 2. When one TRP includes a plurality of beams (e.g., 2), and one beam corresponds to a plurality of users (e.g., 2), different users can be simultaneously distinguished by the first scrambling code identifier, different beams can be distinguished by the second scrambling code identifier, and different TRPs can be distinguished by the third scrambling code identifier, that is, the network device performs joint scrambling by the first scrambling code identifier, the second scrambling code identifier, and the second scrambling code identifier. As shown in fig. 21, the combined values of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity are (1, 1,1, 1,1, 1,1, 1) for user 1 under beam 1 of TRP1, and the combined values of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity are (1, 1, -1, -1, 1,1, -1) for user 1 under beam 2 of TRP 1; the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, 1,1, 1, -1, -1, -1, -1) for user 1 under beam 2 of TRP2, and the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, 1, -1, -1, -1, -1, 1,1) for user 1 under beam 1 of TRP 2; the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, -1, 1, -1, 1, -1, 1, -1) for user 2 under beam 2 of TRP1, the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, -1, -1, 1,1, -1, -1, 1) for user 2 under beam 1 of TRP1, the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, -1, 1, -1, -1, 1, -1, 1, -1, 1) for user 2 under beam 1 of TRP2, the combined value of the first scrambling code identity, the second scrambling code identity and the third scrambling code identity is (1, -1, -1, 1,1, -1, 1,1, -1) for user 2 under beam 2 of TRP 2.

In the method for transmitting the demodulation reference signal DMRS, network equipment or a terminal can determine the DMRS to be transmitted according to the acquired scrambling code identification of the DMRS, and map the DMRS to be transmitted to the target transmission resource for transmission according to the acquired resource mapping granularity, so that the DMRS to be transmitted is mapped to the RE group or the RB group, the detection performance of the DMRS can be improved, and the data transmission rate can be further improved.

The foregoing embodiments respectively describe in detail transmission methods of demodulation reference signals DMRSs in different scenarios, and the following embodiments further describe corresponding transmission nodes with reference to the accompanying drawings.

As shown in fig. 22, a transmission node 2200 according to an embodiment of the present invention can implement obtaining a scrambling code identifier of a DMRS in the foregoing embodiment; determining a DMRS to be transmitted according to the scrambling code identifier; acquiring a resource mapping granularity identifier for indicating the resource mapping granularity; according to the indicated resource mapping granularity, the DMRS to be transmitted is mapped to the details of the transmission method on the target transmission resource, and the same effect is achieved; wherein, the resource mapping granularity is: the resource element RE group or the resource block RB group, where the RE group includes at least one RE, and the RB group includes at least one RB, and the transmission node 2200 specifically includes the following functional modules:

a first obtaining module 2210, configured to obtain a scrambling code identifier of the DMRS;

a processing module 2220, configured to determine, according to the scrambling code identifier, a DMRS to be transmitted;

a second obtaining module 2230, configured to obtain a resource mapping granularity identifier indicating a resource mapping granularity;

a transmission module 2240, configured to map, according to the indicated resource mapping granularity, the DMRS to be transmitted to a target transmission resource for transmission; wherein, the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB.

Wherein the scrambling code identity comprises at least one of the following information:

a second scrambling code identification for distinguishing DMRS ports or port groups of different beams; and

a third scrambling code identity for distinguishing DMRS ports or port groups of different transceiving nodes TRP.

Wherein, the first obtaining module 2210 comprises:

a first obtaining submodule for obtaining a first scrambling code identification when only multi-user multiple-input multiple-output (MU-MIMO) transmission is supported

A second obtaining sub-module, configured to obtain a second scrambling code identifier when only multi-beam transmission is supported;

a third obtaining submodule, configured to obtain a third scrambling code identifier when only multiple TRP transmission is supported;

a fourth obtaining submodule, configured to obtain the first scrambling code identifier and/or the second scrambling code identifier when MU-MIMO transmission and multi-beam transmission are simultaneously supported;

a fifth obtaining sub-module, configured to obtain the first scrambling code identifier and/or the third scrambling code identifier when MU-MIMO transmission and multi-TRP transmission are simultaneously supported;

a sixth obtaining sub-module, configured to obtain the second scrambling code identifier and/or the third scrambling code identifier when the multi-beam transmission and the multi-TRP transmission are simultaneously supported;

and the seventh obtaining submodule is used for obtaining the first scrambling code identifier, the second scrambling code identifier and/or the third scrambling code identifier when MU-MIMO transmission, multi-beam transmission and multi-TRP transmission are simultaneously supported.

Wherein, when the transmission node is a network device, the transmission node 2200 further includes:

the first sending module is used for sending a scrambling code identifier to the terminal through a high-level signaling or downlink control information;

and the second sending module is used for sending the resource mapping granularity identifier to the terminal through the high-level signaling or the downlink control information.

Wherein, when the transmission node is a terminal, the first obtaining module 2210 is specifically configured to: receiving a scrambling code identification of the DMRS sent by the network equipment through high-level signaling or downlink control information;

the second obtaining module is specifically configured to: and receiving a resource mapping granularity identifier which indicates the resource mapping granularity and is sent by the network equipment through a high-level signaling or downlink control information.

It should be noted that the above division of each module is only a division of a logic function, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

It is worth pointing out that, the transmission node, that is, the network device or the terminal, in the embodiment of the present invention may determine the DMRS to be transmitted according to the obtained scrambling code identifier of the DMRS, and map the DMRS to be transmitted to the target transmission resource according to the obtained resource mapping granularity for transmission, so that the DMRS to be transmitted is mapped to the RE group or the RB group, which may improve detection performance of the DMRS, and further improve data transmission rate.

In order to better achieve the above object, an embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the steps in the transmission method for the DMRS are implemented as described above. An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the transmission method for the demodulation reference signal DMRS as described above.

Specifically, the embodiment of the invention also provides a network device. As shown in fig. 23, the network device 2300 includes: antenna 231, radio frequency device 232, baseband device 233. The antenna 231 is connected to a radio frequency device 232. In the uplink direction, the rf device 232 receives information through the antenna 231 and sends the received information to the baseband device 233 for processing. In the downlink direction, the baseband device 233 processes information to be transmitted and transmits the processed information to the rf device 232, and the rf device 232 processes the received information and transmits the processed information through the antenna 231.

The above-mentioned band processing means may be located in the baseband device 233, and the method performed by the network device in the above embodiment may be implemented in the baseband device 233, where the baseband device 233 includes a processor 234 and a memory 235.

The baseband device 233 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 23, where one of the chips, for example, the processor 234, is connected to the memory 235 to call the program in the memory 235 to perform the network device operations shown in the above method embodiments.

The baseband device 233 may further include a network interface 236 for exchanging information with the rf device 232, such as a Common Public Radio Interface (CPRI).

The processor may be a single processor or a combination of multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the methods performed by the network devices, for example: one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, or the like. The storage element may be a memory or a combination of a plurality of storage elements.

The memory 235 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (ddr Data Rate SDRAM), Enhanced SDRAM (ESDRAM), synchlronous DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 235 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Specifically, the network device of the embodiment of the present invention further includes: a computer program stored in the memory 235 and executable on the processor 234, the processor 234 calling the computer program in the memory 235 to execute the method performed by each module.

In particular, the computer program when invoked by the processor 234 is operable to perform: acquiring a scrambling code identifier of the DMRS;

Specifically, the scrambling code identification includes at least one of the following information:

In particular, the computer program when invoked by the processor 234 is operable to perform: obtaining a first scrambling code identification when only multi-user multiple-input multiple-output (MU-MIMO) transmission is supported

When only multi-beam transmission is supported, acquiring a second scrambling code identifier;

when only supporting multiple TRP transmission, acquiring a third scrambling code identification;

when MU-MIMO transmission and multi-beam transmission are simultaneously supported, acquiring a first scrambling code identifier and/or a second scrambling code identifier;

when MU-MIMO transmission and multi-TRP transmission are simultaneously supported, a first scrambling code identifier and/or a third scrambling code identifier are/is acquired;

when multi-beam transmission and multi-TRP transmission are simultaneously supported, a second scrambling code identifier and/or a third scrambling code identifier are/is obtained;

when MU-MIMO transmission, multi-beam transmission and multi-TRP transmission are simultaneously supported, a first scrambling code identification, a second scrambling code identification and/or a third scrambling code identification are/is obtained.

In particular, the computer program when invoked by the processor 234 is operable to perform: sending a scrambling code identifier to a terminal; and sending the resource mapping granularity identification to the terminal.

In particular, the computer program when invoked by the processor 234 is operable to perform: sending a scrambling code identifier to a terminal through a high-level signaling or downlink control information;

and sending the resource mapping granularity identification to the terminal through a high-level signaling or downlink control information.

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

The network equipment in the embodiment of the invention can determine the DMRS to be transmitted according to the acquired scrambling code identification of the DMRS, and map the DMRS to be transmitted to the target transmission resource for transmission according to the acquired resource mapping granularity, so that the DMRS to be transmitted is mapped to the RE group or the RB group, the detection performance of the DMRS can be improved, and the data transmission rate can be further improved.

To better achieve the above object, further, fig. 24 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 240 includes, but is not limited to: radio frequency unit 241, network module 242, audio output unit 243, input unit 244, sensor 245, display unit 246, user input unit 247, interface unit 248, memory 249, processor 2410, and power source 2411. Those skilled in the art will appreciate that the terminal configuration shown in fig. 24 is not intended to be limiting, and that the terminal may include more or fewer components than 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.

Wherein, the radio frequency unit 241 is configured to receive and transmit data under the control of the processor 2410;

a processor 2410, configured to obtain a scrambling code identifier of the DMRS;

further, the processor 2410 is further configured to control the radio frequency unit 241 to: mapping the DMRS to be transmitted to target transmission resources for transmission according to the indicated resource mapping granularity; wherein, the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB.

Wherein, the processor 2410 is further configured to: when only multi-user multi-input multi-output MU-MIMO transmission is supported, acquiring a first scrambling code identifier;

The radio frequency unit 241 is configured to: receiving a scrambling code identification of the DMRS sent by the network equipment; and receiving a resource mapping granularity identifier which indicates the resource mapping granularity and is sent by the network equipment.

Specifically, the radio frequency unit 241 is configured to: receiving a scrambling code identification of the DMRS sent by the network equipment through high-level signaling or downlink control information; and receiving a resource mapping granularity identifier which indicates the resource mapping granularity and is sent by the network equipment through a high-level signaling or downlink control information.

The terminal of the embodiment of the invention can determine the DMRS to be transmitted according to the acquired scrambling code identification of the DMRS, and map the DMRS to be transmitted to the target transmission resource for transmission according to the acquired resource mapping granularity, so that the DMRS to be transmitted is mapped to the RE group or the RB group, the detection performance of the DMRS can be improved, and the data transmission rate can be further improved.

It should be understood that, in the embodiment of the present invention, the rf unit 241 may be used for receiving and transmitting signals during a message transmission or a call, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 2410; in addition, the uplink data is transmitted to the base station. Generally, radio frequency unit 241 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 241 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 242, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 243 may convert audio data received by the radio frequency unit 241 or the network module 242 or stored in the memory 249 into an audio signal and output as sound. Also, the audio output unit 243 may also provide audio output related to a specific function performed by the terminal 240 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 243 includes a speaker, a buzzer, a receiver, and the like.

The input unit 244 is used to receive audio or video signals. The input Unit 244 may include a Graphics Processing Unit (GPU) 2441 and a microphone 2442, and the Graphics processor 2441 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 246. The image frames processed by the graphic processor 2441 may be stored in the memory 249 (or other storage medium) or transmitted via the radio frequency unit 241 or the network module 242. The microphone 2442 can receive sounds and can process such sounds 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 241 in case of the phone call mode.

The terminal 240 also includes at least one sensor 245, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 2461 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 2461 and/or a backlight when the terminal 240 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 245 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 246 is used to display information input by a user or information provided to the user. The Display unit 246 may include a Display panel 2461, and the Display panel 2461 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 247 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 247 includes a touch panel 2471 and other input devices 2472. The touch panel 2471, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 2471 (e.g., operations by a user on or near the touch panel 2471 using a finger, a stylus, or any other suitable object or accessory). The touch panel 2471 may include two parts of 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, sends the touch point coordinates to the processor 2410, and receives and executes commands sent by the processor 2410. In addition, the touch panel 2471 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 2471, the user input unit 247 may include other input devices 2472. In particular, the other input devices 2472 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein.

Further, the touch panel 2471 may be overlaid on the display panel 2461, and when the touch panel 2471 detects a touch operation on or near the touch panel 2471, the touch panel is transmitted to the processor 2410 to determine the type of the touch event, and then the processor 2410 provides a corresponding visual output on the display panel 2461 according to the type of the touch event. Although the touch panel 2471 and the display panel 2461 are shown in fig. 24 as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 2471 and the display panel 2461 may be integrated to implement the input and output functions of the terminal, and the implementation is not limited herein.

The interface unit 248 is an interface for connecting an external device to the terminal 240. 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 248 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 240 or may be used to transmit data between the terminal 240 and an external device.

The memory 249 may be used to store software programs as well as various data. The memory 249 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 for 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 249 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 2410 is a control center of the terminal, connects various parts of the entire terminal by using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 249 and calling data stored in the memory 249, thereby performing overall monitoring of the terminal. Processor 2410 may include one or more processing units; preferably, the processor 2410 can integrate an application processor, which primarily handles operating systems, user interfaces, application programs, and the like, and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 2410.

The terminal 240 may further include a power source 2411 (e.g., a battery) for supplying power to the various components, and preferably, the power source 2411 may be logically connected to the processor 2410 via a power management system, so as to manage charging, discharging, and power consumption via the power management system.

In addition, the terminal 240 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, which includes a processor 2410, a memory 249, and a computer program stored in the memory 249 and capable of running on the processor 2410, where the computer program, when executed by the processor 2410, implements each process of the foregoing method for transmitting a DMRS for a demodulation reference signal, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here. A terminal may be a wireless terminal or a wired terminal, and a 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 mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., 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 language 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 User Device or User Equipment (User Equipment), which are not limited herein.

The 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 when the computer program is executed by a processor, the computer program implements each process of the foregoing embodiment of the method for transmitting a demodulation reference signal DMRS, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A transmission method of a demodulation reference signal (DMRS) is applied to a transmission node and is characterized by comprising the following steps:

acquiring a scrambling code identifier of the DMRS;

mapping the DMRS to be transmitted to target transmission resources for transmission according to the indicated resource mapping granularity; wherein the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB;

the scrambling code identification comprises at least one of the following information:

2. The method for transmitting the DMRS according to claim 1, wherein the step of obtaining the scrambling code identification of the DMRS comprises:

when only multi-user multi-input multi-output MU-MIMO transmission is supported, acquiring a first scrambling code identifier;

3. The method for transmitting the DMRS according to any one of claims 1 to 2, wherein, when the transmission node is a network device, the step of obtaining the identification of the scrambling code of the DMRS is followed by the step of:

sending the scrambling code identification to a terminal through a high-level signaling or downlink control information;

after the step of obtaining the resource mapping granularity identifier for indicating the resource mapping granularity, the method further includes:

4. The method for transmitting the DMRS according to any one of claims 1 to 2, wherein the step of obtaining the scrambling code identification of the DMRS comprises, when the transmission node is a terminal:

receiving a scrambling code identification of the DMRS sent by the network equipment through high-level signaling or downlink control information;

the step of obtaining a resource mapping granularity identifier for indicating the resource mapping granularity includes:

and receiving a resource mapping granularity identifier which indicates the resource mapping granularity and is sent by the network equipment through a high-level signaling or downlink control information.

5. A transmission node, comprising:

the transmission module is used for mapping the DMRS to be transmitted to target transmission resources for transmission according to the indicated resource mapping granularity; wherein the resource mapping granularity is: a Resource Element (RE) group or a Resource Block (RB) group, the RE group including at least one RE, the RB group including at least one RB;

6. The transmission node of claim 5, wherein the first obtaining module comprises:

7. The transmitting node according to any of claims 5 to 6, wherein when the transmitting node is a network device, the transmitting node further comprises:

the first sending module is used for sending the scrambling code identification to the terminal through high-level signaling or downlink control information;

and the second sending module is used for sending the resource mapping granularity identifier to the terminal through a high-level signaling or downlink control information.

8. The transmission node according to any one of claims 5 to 6, wherein, when the transmission node is a terminal, the first obtaining module is specifically configured to: receiving a scrambling code identification of the DMRS sent by the network equipment through high-level signaling or downlink control information;

9. A network device, characterized in that the network device comprises a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method for transmitting a demodulation reference signal, DMRS, according to any one of claims 1 to 3.

10. A terminal, characterized in that the terminal comprises a processor, a memory, and a computer program stored on the memory and being executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for transmission of demodulation reference signals (DMRS) according to any one of claims 1 to 2 or 4.

11. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, implements the steps of the transmission method for demodulation reference signals, DMRS, according to any one of claims 1 to 4.