CN116918288A

CN116918288A - Mapping methods, devices, equipment and storage media

Info

Publication number: CN116918288A
Application number: CN202280000461.1A
Authority: CN
Inventors: 罗星熠
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2023-10-20
Also published as: WO2023155112A1

Abstract

This application discloses a mapping method, device, equipment and storage medium, relating to the field of mobile communications. The method includes: the terminal determines a demodulation reference signal DMRS mapping method according to a frequency domain reuse factor, the frequency domain reuse factor represents the number of orthogonal ports supported by frequency division multiplexing in the basic unit, and in the DMRS mapping method The first number of resource element REs belong to the same DMRS port. The frequency domain reuse factor is greater than 2, which expands more ways to determine the DMRS mapping method, and increasing the frequency domain reuse factor can reduce the number of REs serving the same port. , that is, the number of supported orthogonal ports can be increased, thereby ensuring the system capacity.

Description

Mapping method, mapping device, mapping equipment and storage medium

Technical Field

The present application relates to the field of mobile communications, and in particular, to a mapping method, apparatus, device, and storage medium.

Background

In the mobile communication technology, two DMRS (Demodulation Reference Signal ) mapping methods are proposed, which are a Type1 (Type 1) mapping method and a Type2 mapping method, wherein the Type1 mapping method includes single-symbol mapping and double-symbol mapping, the single-symbol mapping in the Type1 mapping method maximally supports 4 antenna ports, the double-symbol mapping in the Type1 mapping method maximally supports 8 antenna ports, the Type2 mapping method also includes single-symbol mapping and double-symbol mapping, the single-symbol mapping in the Type2 mapping method maximally supports 6 antenna ports, and the double-symbol mapping in the Type2 mapping method maximally supports 12 antenna ports. However, DMRS mapping methods in the current mobile communication technology are less, and MU-MIMO (Multi-User Multiple-Input Multiple-Output) of more users is not supported, so as to further improve the system capacity.

Disclosure of Invention

The embodiment of the application provides a mapping method, a mapping device, mapping equipment and a storage medium, which expand more modes for determining a DMRS mapping mode, and improve the number of ports which are supported in an orthogonal manner, thereby improving the system capacity of communication. The technical scheme is as follows:

according to an aspect of the present application, there is provided a mapping method, the method comprising:

and determining a demodulation reference signal (DMRS) mapping mode according to a frequency domain reuse factor, wherein the frequency domain reuse factor represents the number of orthogonal ports supported in a basic unit through a frequency division multiplexing mode, the DMRS ports to which a first number of Resource Elements (RE) belong in the DMRS mapping mode are the same, and the frequency domain reuse factor is larger than 2.

the DMRS mapping manner is determined according to an orthogonal mask of a preset order indicating the number of orthogonal DMRS ports supported within one CDM (Code Division Multiplexing ) group on the frequency domain.

And determining a DMRS mapping mode according to a plurality of RBs (Resource blocks), wherein the DMRS mapping mode uses the plurality of RBs as basic units for mapping.

According to an aspect of the present application, there is provided a mapping apparatus, the apparatus comprising:

the determining module is configured to determine a DMRS mapping manner of the demodulation reference signal according to a frequency domain reuse factor, where the frequency domain reuse factor indicates the number of orthogonal ports supported in the basic unit by a frequency division multiplexing manner, DMRS ports to which a first number of resource elements REs belong in the DMRS mapping manner are the same, and the frequency domain reuse factor is greater than 2.

and the determining module is used for determining a DMRS mapping mode according to an orthogonal mask with a preset order on a frequency domain, wherein the orthogonal mask with the preset order indicates the number of orthogonal DMRS ports supported in one CDM group.

and the determining module is used for determining a DMRS mapping mode according to the plurality of RBs, wherein the DMRS mapping mode is mapped by taking the plurality of RBs as basic units.

According to an aspect of the present application, there is provided a terminal including: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the mapping method or mapping methods as described above.

According to an aspect of the present application, there is provided a network device comprising: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the mapping method of the above aspect.

According to an aspect of the present application, there is provided a computer readable storage medium having stored therein executable program code loaded and executed by a processor to implement the mapping method of the above aspect or to implement the mapping method of the above aspect.

According to an aspect of the present application there is provided a chip comprising programmable logic circuitry and/or program instructions for implementing the mapping method of the above aspect or the mapping method of the above aspect when the chip is run on a terminal or network device.

According to an aspect of the present application, there is provided a computer program product for implementing the mapping method of the above aspect or for implementing the mapping method of the above aspect, when the computer program product is executed by a processor of a terminal or network device.

In the mapping scheme provided by the embodiment of the application, the frequency domain reuse factor is adjusted to determine the DMRS mapping mode, so that more modes for determining the DMRS mapping mode are expanded, and the frequency domain reuse factor is increased to reduce the number of REs serving the same port, namely the number of ports supporting orthogonality can be increased, and the system capacity of communication is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a block diagram of a communication system provided by an exemplary embodiment of the present application;

FIG. 2 illustrates a flow chart of a mapping method provided by an exemplary embodiment of the present application;

FIG. 3 illustrates a flow chart of another mapping method provided by an exemplary embodiment of the present application;

FIG. 4 is a diagram illustrating a mapping scheme provided by an exemplary embodiment of the present application;

FIG. 5 illustrates a schematic diagram of another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 6 illustrates a schematic diagram of yet another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 7 is a schematic diagram of yet another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 8 illustrates a flow chart of yet another mapping method provided by an exemplary embodiment of the present application;

FIG. 9 is a diagram illustrating yet another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 10 illustrates a flow chart of yet another mapping method provided by an exemplary embodiment of the present application;

FIG. 11 is a schematic diagram of yet another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 12 illustrates a flow chart of yet another mapping method provided by an exemplary embodiment of the present application;

FIG. 13 illustrates a schematic diagram of yet another mapping scheme provided by an exemplary embodiment of the present application;

FIG. 14 illustrates a block diagram of a mapping apparatus provided by an exemplary embodiment of the present application;

FIG. 15 illustrates a block diagram of another mapping apparatus provided by an exemplary embodiment of the present application;

FIG. 16 illustrates a block diagram of another mapping apparatus provided by an exemplary embodiment of the present application;

FIG. 17 illustrates a block diagram of another mapping apparatus provided by an exemplary embodiment of the present application;

FIG. 18 illustrates a block diagram of another mapping apparatus provided by an exemplary embodiment of the present application;

fig. 19 shows a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description, when taken in conjunction with the accompanying drawings, refers to the same or similar elements in different drawings, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. Depending on the context, for example, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination".

The following describes an application scenario of the present application:

fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application, which may include: a terminal 10 and a network device 20.

The number of terminals 10 is typically plural and one or more terminals 10 may be distributed within a cell managed by each network device 20. The terminal 10 may include various handheld devices, vehicle mount devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile Station (MS), and the like, having wireless communication capabilities. For convenience of description, in the embodiment of the present application, the above-mentioned devices are collectively referred to as a terminal.

Network device 20 is a means deployed in an access network to provide wireless communication functionality for terminal 10. For convenience of description, the above-described devices for providing the wireless communication function for the terminal 10 are collectively referred to as a network device in the embodiments of the present application. A connection may be established between the network device 20 and the terminal 10 over an air interface so that communication, including interaction of signaling and data, may take place over the connection. The number of network devices 20 may be plural, and two adjacent network devices 20 may communicate with each other by wired or wireless means. The terminal 10 may switch between different network devices 20, i.e. establish a connection with different network devices 20.

The network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. The names of network device-capable devices may vary in systems employing different radio access technologies, for example in 5G NR systems, called gndeb or gNB. As communication technology evolves, the name "network device" may change.

Fig. 2 shows a flowchart of a mapping method according to an exemplary embodiment of the present application, which may be exemplarily applied to the terminal shown in fig. 1, the method including at least some of the following:

step 201: the terminal determines a DMRS mapping mode according to a frequency domain reuse factor, wherein the frequency domain reuse factor represents the number of orthogonal ports supported in a basic unit through a frequency division multiplexing mode, the DMRS ports to which a first number of REs belong in the DMRS mapping mode are the same, and the frequency domain reuse factor is larger than 2.

In the embodiment of the application, the terminal can determine the DMRS mapping mode, and further receive the DMRS according to the determined DMRS mapping mode to perform channel estimation. The terminal obtains a frequency domain reuse factor, where the frequency domain reuse factor represents the number of orthogonal ports supported in the basic unit in a frequency division multiplexing mode, and in addition, DMRS ports to which the first number of REs belong in the DMRS mapping mode are the same, and the terminal can determine the DMRS mapping mode based on the frequency domain reuse factor. The DMRS mapping method supports multiple orthogonal DMRS ports, and if the frequency domain reuse factor is increased, the first number of REs serving the same DMRS port is reduced, and the same number of REs can serve more DMRS ports, so that the number of supported orthogonal DMRS ports is increased.

In some embodiments, the DMRS mapping manner is single symbol mapping, or the DMRS mapping manner is dual symbol mapping.

The single symbol mapping means that the DMRS mapping method is mapping in a unit of one symbol. The dual symbol mapping indicates that the DMRS mapping manner is mapping in units of two symbols.

In some embodiments, the DMRS mapping manner is a continuous mapping, or the DMRS mapping manner is a discontinuous mapping.

The continuous mapping means that the frequency domains occupied by any two REs in the first number of REs are adjacent, and the discontinuous mapping means that the frequency domains occupied by any two REs in the first number of REs are not adjacent.

In the embodiment of the application, the frequency domain reuse factor used for determining the DMRS mapping mode is more than 2, and the number of the supported orthogonal DMRS ports is greatly increased relative to the case that the frequency domain reuse factor is 2, so that the system capacity for communication based on the DMRS ports is improved.

It should be noted that, the embodiment of the present application is only described by taking the terminal determining DMRS mapping manner as an example. In another embodiment, the network device also needs to determine the DMRS mapping manner, and the determining process is similar to the terminal determining process, which is not described herein.

In addition, after determining the DMRS mapping manner, the network device needs to send DMRS mapping indication signaling indicating the DMRS mapping manner to the terminal. Fig. 3 shows a flowchart of a mapping method according to an exemplary embodiment of the present application, and referring to fig. 3, the method includes:

Step 301: and the network equipment sends the DMRS mapping indication signaling to the terminal, and the DMRS mapping indication signaling indicates the DMRS mapping mode.

Step 302: and the terminal receives the DMRS mapping indication signaling sent by the network equipment.

The DMRS mapping indication signaling includes first indication information of whether the DMRS mapping manner is single-symbol mapping or double-symbol mapping. The DMRS mapping indication signaling includes first indication information, and whether the DMRS mapping manner is single symbol mapping or double symbol mapping can be determined according to the first indication information.

Optionally, the DMRS mapping indication signaling is DCI (Downlink Control Information ) signaling.

In addition, the DMRS mapping indication signaling further includes second indication information of whether the DMRS mapping mode is continuous mapping or discontinuous mapping. The DMRS mapping indication signaling includes second indication information, and it can be determined whether the DMRS mapping manner is continuous mapping or discontinuous mapping according to the second indication information.

Optionally, the DMRS mapping signaling is RRC (Radio Resource Control ) signaling.

The content of the DMRS mapping indication signaling includes, but is not limited to, first indication information and second indication information.

It should be noted that, the steps performed by the network device may be separately formed into one embodiment, or the steps performed by the terminal may be separately formed into one embodiment, which is not limited by the present application.

In the scheme provided by the embodiment of the application, the frequency domain reuse factor is adjusted to determine the DMRS mapping mode, so that more modes for determining the DMRS mapping mode are expanded, and the frequency domain reuse factor is increased to reduce the number of REs belonging to the same DMRS port, namely the number of ports which are supported in orthogonality can be increased, and the system capacity is further increased.

Based on the embodiment shown in fig. 2, if the DMRS mapping manner is mapped with one RB as a basic unit, the DMRS mapping manner indicates that DMRS ports to which the first number of REs belong are the same in one RB.

In the embodiment of the application, when determining the DMRS mapping mode, the terminal maps the DMRS mapping mode with one RB, that is, the DMRS mapping mode is illustrated to be mapped sequentially with one RB as a cycle.

In some embodiments, the frequency domain reuse factor is 3, or the frequency domain reuse factor is 6.

In some embodiments, the first number is a ratio of a number of subbands included in 1 RB to a frequency domain reuse factor.

In the embodiment of the present application, the first number refers to the number of REs serving the same DMRS port, that is, the number of REs illustrating different DMRS ports is the first number, and the number of subbands included in one RB is the same, so that the ratio of the number of subbands included in the RB to the number of frequency domain reuse factors is taken as the first number.

For example, if the number of subbands included in 1 RB is 12 and the frequency domain reuse factor is 3, the determined first number is 4.

In the following, a frequency domain reuse factor of 3 is taken as an example, a DMRS mapping manner is single symbol mapping, discontinuous mapping, and mapping is performed by taking one RB as a basic unit.

In the embodiment of the present application, the first number in the DMRS mapping manner is 4, that is, one DMRS port is served for every 4 REs.

The mapping formula of the DMRS mapping mode is as follows:

wherein,for scaling factor, w _f () is an orthogonal mask in the frequency domain, ω _t (.) is an orthogonal mask in the time domain, delta is a frequency domain position adjustment parameter,for the time domain position of DMRS in one slot (slot), k 'is the frequency domain index, l' is the time domain index, k represents the position of RE in the frequency domain, l represents the RE in the time domain R (-) indicates a sequence to be transmitted, n indicates an index of the sequence to be transmitted, p indicates a DMRS port,representing symbols mapped onto REs (k, l), which represent positions of REs in the frequency and time domains.

Referring to table 1, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 1

Referring to fig. 4, the orthogonal mask is a 2-order Walsh (a sequence) sequence in the mapping manner, and is a single symbol mapping, and the Walsh sequence indicates that the number of ports supporting orthogonality in the frequency domain is 2, and is a single symbol mapping, and the ports of REs located at the same position in the RB are located in the same CDM group. That is, in fig. 4, the same time-frequency resource is shared with the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is 6 at the maximum. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 12.

In the following, a frequency domain reuse factor of 6 is taken as an example, a DMRS mapping manner is single symbol mapping, continuous mapping, and mapping is performed by taking one RB as a basic unit.

In the embodiment of the present application, the first number in the DMRS mapping manner is 2, that is, one DMRS port is served for every 2 REs.

The mapping formula of the DMRS mapping mode is as follows:

wherein,for scaling factor, w _f () is an orthogonal mask in the frequency domain, ω _t (.) is an orthogonal mask in the time domain, delta is a frequency domain position adjustment parameter,for the time domain position of DMRS in one slot, k 'is the frequency domain index, l' is the time domain index, k represents the position of RE in the frequency domain, l represents the position of RE in the time domain, r (), n represents the index of the sequence to be transmitted, p represents the DMRS port,representing symbols mapped onto REs (k, l), which represent positions of REs in the frequency and time domains.

Referring to table 2, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 2

Referring to fig. 5, the orthogonal mask is a 2-order Walsh sequence in this mapping manner, and is a single symbol mapping, ports of REs located at the same position in an RB are identical to one CDM group. That is, in fig. 5, the same time-frequency resource is shared by the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is at most 12, while if other conditions are unchanged, the mapping method is a two-symbol mapping, the number of supported orthogonal DMRS ports is at most 24.

In the following, a frequency domain reuse factor of 6 is taken as an example, a DMRS mapping manner is single symbol mapping, discontinuous mapping, and mapping is performed by taking one RB as a basic unit.

The mapping formula of the DMRS mapping mode is as follows:

Referring to table 3, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 3 Table 3

Referring to fig. 6, the orthogonal mask is a 2-order Walsh sequence in this mapping manner, and is a single symbol mapping, ports of REs located at the same position in an RB are identical to one CDM group. That is, in fig. 6, the same time-frequency resource is shared by the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is 12, and if other conditions are unchanged, the mapping method is a two-symbol mapping, the number of supported orthogonal DMRS ports is at most 24.

Based on the embodiment shown in fig. 2, if the DMRS mapping manner is mapped by using a plurality of RBs as the basic unit, the DMRS mapping manner indicates that DMRS ports to which the second number of REs belong are the same in the plurality of RBs.

In the embodiment of the application, when determining the DMRS mapping manner, the terminal maps with a plurality of RBs as basic units, that is, the DMRS mapping manner is described as cycling with a plurality of RBs, and then maps sequentially.

For example, the DMRS mapping method may map with 2 RBs as basic units, or map with 4 RBs as basic units, or map with other numbers of RBs as basic units.

In some embodiments, the frequency domain reuse factor in embodiments of the present application is 4.

In some embodiments, the second number is a ratio of a number of subbands included in the plurality of RBs to a frequency domain reuse factor.

In the embodiment of the present application, the second number refers to the number of REs of the DMRS ports having the same service in multiple RBs, that is, the number of REs illustrating different DMRS ports is the second number, and the number of subbands included in multiple RBs is the same, so that a ratio of the number of subbands included in multiple RBs to the number of frequency domain reuse factors is taken as the second number.

For example, the DMRS mapping method is mapping performed using 2 RBs as basic units, and the number of subbands included in the 2 RBs is 24, and the frequency domain reuse factor is 4, and the determined second number is 6.

In the following, a case is described in which the frequency domain reuse factor is 4, the DMRS mapping method is single symbol mapping or discontinuous mapping, and the DMRS mapping method uses 2 RBs as basic elements for mapping.

In the embodiment of the present application, the second number in the DMRS mapping manner is 6, that is, one DMRS port is served for every 6 REs.

The mapping formula of the DMRS mapping mode is as follows:

Referring to table 4, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 4 Table 4

Referring to fig. 7, the orthogonal mask is a 2-order Walsh sequence in this mapping manner, and is a single symbol mapping, ports of REs located at the same position in two RBs are identical to one CDM group. That is, in fig. 7, the same time-frequency resource is shared with the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is 8 at the maximum. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 16.

On the basis of the embodiment shown in fig. 2, not only the frequency domain reuse factor but also the orthogonal mask of the preset order introduced in the frequency domain need to be considered when determining the DMRS mapping mode. Referring to fig. 8, the method includes:

step 801: the terminal or the network device determines the DMRS mapping mode according to an orthogonal mask of a preset order on the frequency domain and a frequency domain reuse factor, wherein the orthogonal mask of the preset order indicates the number of orthogonal DMRS ports supported in one CDM group.

In the embodiment of the application, the number of the supported orthogonal DMRS ports can be increased by increasing the preset order of the orthogonal mask when the orthogonal mask with the preset order is introduced in the frequency domain, and for the terminal and the network equipment, the DMRS mapping mode can be determined according to the orthogonal mask with the preset order in the frequency domain and the frequency domain reuse factor.

Wherein the preset order of the orthogonal mask indicates the maximum number of DMRS ports of orthogonality supported on the frequency domain.

In some embodiments, the orthogonal mask is represented by Walsh (a sequence) sequences.

In some embodiments, the preset order is 4, or the preset order is 8.

In the following, the frequency domain reuse factor is 3, the DMRS mapping mode is single symbol mapping or discontinuous mapping, and the DMRS mapping mode uses 1 RB as a basic unit to map, and the orthogonal mask is 4 th order, which is illustrated as an example.

In the embodiment of the present application, one DMRS port is served for every 4 REs in the DMRS mapping manner.

The mapping formula of the DMRS mapping mode is as follows:

Referring to table 5, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 5

Referring to fig. 9, the orthogonal mask is a 4-order Walsh sequence in this mapping manner, and is a single symbol mapping, ports of REs located at the same position in an RB are identical to one CDM group. That is, in fig. 9, the same time-frequency resource is shared with the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is at most 12. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 24.

Fig. 10 is a flowchart of a mapping method according to an exemplary embodiment of the present application, which may be exemplarily applied to a terminal or a network device as shown in fig. 1, and includes at least some of the following:

step 1001: and the terminal or the network equipment determines a DMRS mapping mode according to an orthogonal mask with a preset order on a frequency domain, wherein the orthogonal mask with the preset order indicates the number of orthogonal DMRS ports supported in one CDM group.

In the embodiment of the application, the terminal or the network equipment can determine the DMRS mapping mode, and further receive the DMRS according to the determined DMRS mapping mode so as to perform channel estimation. The terminal or the network device obtains an orthogonal mask with a preset order in the frequency domain, and the terminal can determine the DMRS mapping mode based on the orthogonal mask with the preset order in the frequency domain.

In some embodiments, DMRS ports to which the first number of resource elements REs belong in the DMRS mapping manner are the same. The embodiment of the application determines the DMRS mapping mode through the default frequency domain reuse factor, namely the frequency domain reuse factor can indicate that the DMRS ports to which the first number of REs belong are the same.

In some embodiments, the preset order is 4, or the preset order is 8.

For example, referring to fig. 9 in the above embodiment, the orthogonal mask used in the mapping manner is a 4-order Walsh sequence, the frequency domain reuse factor is a default value of 2, and the DMRS mapping manner is single symbol mapping, then the ports of REs located at the same position in the RB are in the same CDM group, and the number of supported DMRS ports is at most 12. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 24.

In addition, the description will be given by taking frequency domain reuse factor of 3, DMRS mapping method of single symbol mapping, continuous mapping, and 1 RB as basic element for mapping, and orthogonal mask of 4 order as an example.

The mapping formula of the DMRS mapping mode is as follows:

Referring to table 6, the values of the symbols in the above formula are shown, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 6

Referring to fig. 11, the orthogonal mask is a 4-order Walsh sequence in this mapping manner, and is a single symbol mapping, ports of REs located at the same position in an RB are identical to one CDM group. That is, in fig. 11, the same time-frequency resource is shared with the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is at most 12. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 24.

In addition, after determining the DMRS mapping manner, the network device needs to send DMRS mapping indication signaling indicating the DMRS mapping manner to the terminal. The network device sends a DMRS mapping indication signaling to the terminal, the DMRS mapping indication signaling indicates a DMRS mapping mode, and the terminal receives the DMRS mapping indication signaling sent by the network device.

Optionally, the DMRS mapping indication signaling is DCI signaling.

In addition, the DMRS mapping indication signaling further includes second indication information of whether the DMRS mapping mode is continuous mapping or discontinuous mapping. The DMRS mapping indication signaling includes second indication information, and according to the second indication information, whether the DMRS mapping mode is continuous mapping or discontinuous mapping can be determined.

Optionally, the DMRS mapping signaling is RRC signaling.

In the scheme provided by the embodiment of the application, the frequency domain reuse factor can be used for determining the DMRS mapping mode by adjusting the preset order of the orthogonal mask on the frequency domain, more DMRS mapping modes are expanded, the preset order of the orthogonal mask is increased, the number of ports of the supported orthogonality can be increased, and the system capacity is further improved.

Fig. 12 is a flowchart of a mapping method according to an exemplary embodiment of the present application, which may be exemplarily applied to a terminal or a network device as shown in fig. 1, and includes at least some of the following:

step 1201: and the terminal or the network equipment determines a DMRS mapping mode according to the plurality of RBs, and the DMRS mapping mode is mapped by taking the plurality of RBs as basic units.

In an embodiment of the present application, the second number is a default value, or is configured by the network device, or is configured in other manners.

In some embodiments, DMRS ports to which the second number of REs belong in the DMRS mapping manner are the same. The embodiment of the application determines the DMRS mapping mode through the default frequency domain reuse factor, namely the frequency domain reuse factor can indicate that the DMRS ports to which the second number of REs belong are the same.

Wherein, the continuous mapping means that the frequency domains occupied by any two REs in the second number of REs are adjacent, and the discontinuous mapping means that the frequency domains occupied by any two REs in the second number of REs are not adjacent.

In addition, after determining the DMRS mapping manner, the network device needs to send DMRS mapping indication signaling indicating the DMRS mapping manner to the terminal. The network device sends a DMRS mapping indication signaling to the terminal, the DMRS mapping indication signaling indicates a DMRS mapping mode, and the terminal receives the DMRS mapping indication signaling sent by the network device, and further determines the DMRS mapping mode based on the received DMRS mapping indication signaling.

Optionally, the DMRS mapping indication signaling is DCI signaling.

Optionally, the DMRS mapping signaling is RRC signaling.

It should be noted that the above embodiments may be split into new embodiments or combined with other embodiments to form new embodiments, and the combination of the embodiments is not limited by the present application.

For example, the above-described embodiments of fig. 11 and 12 may be combined to form a new embodiment. In the following, the frequency domain reuse factor is 2, the DMRS mapping mode is single symbol mapping or discontinuous mapping, and the DMRS mapping mode uses 2 RBs as basic units for mapping, and the orthogonal mask is 4 th order.

In the embodiment of the present application, one DMRS port is served for every 6 REs in the DMRS mapping manner.

The mapping formula of the DMRS mapping mode is as follows:

wherein,for scaling factor, w _f () is an orthogonal mask in the frequency domain, ω _t (.) is an orthogonal mask in the time domain, delta is a frequency domain position adjustment parameter,for the time domain position of DMRS in one slot, k 'is a frequency domain index, l' is a time domain index, k represents the position of RE in the frequency domain, l represents the position of RE in the time domain, r (), r represents the generated pseudo-random sequence to be transmitted, n represents the index of the sequence to be transmitted, p represents the port, Representing symbols mapped onto REs (k, l), which represent positions of REs in the frequency and time domains.

The values of the symbols in the above formula are shown in table 7, where CDM group λ represents the packet identifier to which each resource location that is a mapping relationship with each other belongs:

TABLE 7

Referring to fig. 13, in the mapping manner, the orthogonal mask is a 4-order Walsh sequence, and is a single symbol mapping, ports of REs located at the same position in the RB are identical to one CDM group. That is, in fig. 13, the same time-frequency resource is shared with the ports (patterns) in one CDM group by the code division multiplexing method, and the number of supported orthogonal DMRS ports is 8 at the maximum. If other conditions are not changed, the mapping mode is double-symbol mapping, and the maximum number of the supported orthogonal DMRS ports is 16.

Fig. 14 shows a block diagram of a mapping apparatus provided by an exemplary embodiment of the present application, see fig. 3, comprising:

a determining module 1401, configured to determine a demodulation reference signal DMRS mapping manner according to a frequency domain reuse factor, where the frequency domain reuse factor indicates the number of orthogonal ports supported in the basic unit by the frequency division multiplexing manner, and DMRS ports to which the first number of resource elements RE belong in the DMRS mapping manner are the same, and the frequency domain reuse factor is greater than 2.

In some embodiments, the DMRS mapping manner is continuous mapping, or the DMRS mapping manner is discontinuous mapping;

In some embodiments, the DMRS mapping manner uses one physical resource block RB as a basic unit for mapping, where the DMRS mapping manner indicates that DMRS ports to which the first number of REs belong are the same in one RB.

In some embodiments, the DMRS mapping manner maps with a plurality of RBs as a basic unit, where the DMRS mapping manner indicates that DMRS ports to which the second number of REs belong are the same in the plurality of RBs.

In some embodiments, the frequency domain reuse factor is 4.

In some embodiments, the determining module 1401 is configured to determine the DMRS mapping manner according to an orthogonal mask with a preset order on a frequency domain and a frequency domain reuse factor, where the preset order of the orthogonal mask indicates the number of orthogonal DMRS ports supported in one CDM group.

In some embodiments, the preset order is 4, or the preset order is 8.

In some embodiments, referring to fig. 15, the apparatus further comprises:

a receiving module 1501, configured to receive DMRS mapping indication signaling sent by a network device, where the DMRS mapping indication signaling indicates a DMRS mapping manner.

In some embodiments, referring to fig. 16, the apparatus further comprises:

and the sending module 1601 is configured to send DMRS mapping indication signaling to the terminal, where the DMRS mapping indication signaling indicates a DMRS mapping manner.

It should be noted that, in the apparatus provided in the foregoing embodiment, when implementing the functions thereof, only the division of the foregoing functional modules is used as an example, in practical application, the foregoing functional allocation may be implemented by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to implement all or part of the functions described above. In addition, the apparatus and the method embodiments provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the apparatus and the method embodiments are detailed in the method embodiments and are not repeated herein.

Fig. 17 shows a block diagram of a mapping apparatus according to an exemplary embodiment of the present application, see fig. 17, which includes:

a determining module 1701, configured to determine a DMRS mapping manner according to an orthogonal mask with a preset order on a frequency domain, where the preset order of the orthogonal mask indicates the number of orthogonal DMRS ports supported in one CDM group.

In some embodiments, the preset order is 4, or the preset order is 8.

In some embodiments, DMRS ports to which the first number of REs belong in the DMRS mapping manner are the same.

Fig. 18 shows a block diagram of a mapping apparatus provided by an exemplary embodiment of the present application, see fig. 18, comprising:

a determining module 1801, configured to determine a DMRS mapping manner according to the plurality of RBs, where the DMRS mapping manner is mapped with the plurality of RBs as a basic unit.

In some embodiments, DMRS ports to which the second number of resource elements REs belong in the DMRS mapping manner are the same.

Fig. 19 shows a schematic structural diagram of a communication device according to an exemplary embodiment of the present application, including: a processor 1901, a receiver 1902, a transmitter 1903, a memory 1904, and a bus 1905.

The processor 1901 includes one or more processing cores, and the processor 1901 executes various functional applications and information processing by running software programs and modules.

The receiver 1902 and the transmitter 1903 may be implemented as a communication component, which may be a communication chip.

The memory 1904 is connected to the processor 1901 via a bus 1905.

The memory 1904 may be used for storing at least one program code and the processor 1901 is used for executing the at least one program code to implement the steps of the method embodiments described above.

Furthermore, the communication device may be a terminal or a network device. The memory 1904 may be implemented by any type of volatile or nonvolatile storage device, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein executable program code loaded and executed by a processor to implement the mapping method performed by a communication device provided by the above respective method embodiments.

In an exemplary embodiment, a chip is provided, which includes programmable logic circuits and/or program instructions for implementing the mapping method as provided by the various method embodiments when the chip is run on a terminal or network device.

In an exemplary embodiment, a computer program product is provided for implementing the mapping method provided by the above-described respective method embodiments, when said computer program product is executed by a processor of a terminal or network device.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

A mapping method, the method comprising:

and determining a demodulation reference signal (DMRS) mapping mode according to a frequency domain reuse factor, wherein the frequency domain reuse factor represents the number of orthogonal ports supported in a basic unit through a frequency division multiplexing mode, the DMRS ports of a first number of Resource Elements (RE) in the DMRS mapping mode are the same, and the frequency domain reuse factor is larger than 2.
The method of claim 1, wherein the DMRS mapping scheme is single symbol mapping or the DMRS mapping scheme is dual symbol mapping.
The method of claim 1, wherein the DMRS mapping manner is a continuous mapping or the DMRS mapping manner is a discontinuous mapping;

the continuous mapping means that frequency domains occupied by any two REs in the first number of REs are adjacent, and the discontinuous mapping means that frequency domains occupied by any two REs in the first number of REs are not adjacent.
A method according to any one of claims 1 to 3, wherein the DMRS mapping manner is mapped with one resource block RB as a basic unit, and the DMRS mapping manner indicates that DMRS ports to which the first number of REs belong are the same in the one RB.
The method of claim 4, wherein the frequency domain reuse factor is 3 or the frequency domain reuse factor is 6.
The method of claim 4, wherein the first number is a ratio of a number of subbands included in 1 RB to the frequency domain reuse factor.
The method of any of claims 1 to 3, wherein the DMRS mapping manner maps with a plurality of RBs as basic units, and the DMRS mapping manner indicates that DMRS ports to which a second number of REs belong are the same in the plurality of RBs.
The method of claim 7, wherein the frequency domain reuse factor is 4.
The method of claim 7, wherein the second number is a ratio of a number of subbands included in the plurality of RBs to the frequency domain reuse factor.
The method according to any one of claims 1 to 9, wherein the determining the DMRS mapping manner according to the frequency domain reuse factor comprises:

and determining a DMRS mapping mode according to an orthogonal mask with preset orders on a frequency domain and the frequency domain reuse factor, wherein the orthogonal mask with preset orders indicates the number of orthogonal DMRS ports supported in one CDM group.
The method of claim 10, wherein the preset order is 4 or the preset order is 8.
The method according to any of claims 1 to 11, wherein the method is performed by a terminal, the method further comprising:

and the terminal receives a DMRS mapping indication signaling sent by the network equipment, wherein the DMRS mapping indication signaling indicates the DMRS mapping mode.
The method according to any of claims 1 to 11, wherein the method is performed by a network device, the method further comprising:

and the network equipment sends a DMRS mapping indication signaling to the terminal, wherein the DMRS mapping indication signaling indicates the DMRS mapping mode.
A mapping method, the method comprising:

and determining a DMRS mapping mode according to an orthogonal mask with preset orders on a frequency domain, wherein the orthogonal mask with preset orders indicates the number of orthogonal DMRS ports supported in one CDM group.
The method of claim 14, wherein the DMRS mapping scheme is single symbol mapping or the DMRS mapping scheme is dual symbol mapping.
The method of claim 14, wherein the DMRS mapping manner is a continuous mapping or the DMRS mapping manner is a discontinuous mapping;

The continuous mapping means that frequency domains occupied by any two REs in the first number of REs are adjacent, and the discontinuous mapping means that frequency domains occupied by any two REs in the first number of REs are not adjacent.
The method according to any one of claims 14 to 16, wherein the preset order is 4 or the preset order is 8.
The method of any of claims 14 to 17, wherein DMRS ports to which the first number of resource elements REs belong in the DMRS mapping manner are the same.
A mapping method, the method comprising:

and determining a DMRS mapping mode according to the plurality of RBs, wherein the DMRS mapping mode is mapped by taking the plurality of RBs as basic units.
The method of claim 19, wherein the DMRS mapping scheme is single symbol mapping or the DMRS mapping scheme is dual symbol mapping.
The method of claim 19, wherein the DMRS mapping manner is a continuous mapping or the DMRS mapping manner is a discontinuous mapping;

the continuous mapping means that frequency domains occupied by any two REs in the second number of REs are adjacent, and the discontinuous mapping means that frequency domains occupied by any two REs in the second number of REs are not adjacent.
The method of any of claims 19 to 21, wherein DMRS ports to which the second number of resource elements REs belong in the DMRS mapping manner are the same.
A mapping apparatus, the apparatus comprising:

the determining module is configured to determine a demodulation reference signal DMRS mapping manner according to a frequency domain reuse factor, where the frequency domain reuse factor indicates the number of orthogonal ports supported in the basic unit by a frequency division multiplexing manner, DMRS ports to which a first number of resource elements REs belong in the DMRS mapping manner are the same, and the frequency domain reuse factor is greater than 2.
A mapping apparatus, the apparatus comprising:

and the determining module is used for determining a DMRS mapping mode according to an orthogonal mask with a preset order on a frequency domain, wherein the orthogonal mask with the preset order indicates the number of orthogonal DMRS ports supported in one CDM group.
A mapping apparatus, the apparatus comprising:

and the determining module is used for determining a DMRS mapping mode according to the plurality of RBs, wherein the DMRS mapping mode is mapped by taking the plurality of RBs as basic units.
A terminal, the terminal comprising:

a processor;

A transceiver coupled to the processor;

wherein the processor is configured to load and execute executable instructions to implement the mapping method of any of claims 1 to 22.
A network device, the network device comprising:

a processor;

a transceiver coupled to the processor;

wherein the processor is configured to load and execute executable instructions to implement the mapping method of any of claims 1 to 22.
A computer readable storage medium having stored therein executable program code that is loaded and executed by a processor to implement the mapping method of any of claims 1 to 22.
A computer program product for implementing the mapping method according to any of claims 1 to 22 when executed by a processor of a terminal or network device.