WO2019061326A1 - Antenna port, data layer quantity indication method and apparatus, and communication system - Google Patents

Abstract

An antenna port, a data layer quantity indication method and apparatus, and a communication system. The method comprises: a network device indicates, by means of first indication information in common control signaling, the quantity of actually-sent DMRS symbols and/or occupied CDM resource groups in a frequency-domain range acted on by the signaling in a current timeslot, so that a terminal device reading the common control signaling determines, according to the quantity of DMRS symbols and/or the occupied CDM resource groups that are actually sent, the length of terminal dedicated control signaling needing to be detected, and determines, by means of the read terminal dedicated control signaling, the quantity of data layers and an antenna port sequential number transmitted to the terminal device. By means of the method, overheads of the terminal dedicated control signaling are effectively reduced, and the quantity of times of blind detection on the terminal dedicated control signaling performed by the terminal device is reduced.

Description

Method, device and communication system for indicating antenna port and data layer Technical field

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a communication system for indicating an antenna port and a data layer number.

Background technique

In the Enhanced Long Term Evolution-Advanced (LTE-A) system, a Demodulation Reference Signal (DMRS) supporting up to 8 antenna ports is used for channel estimation of the terminal. A reference signal of up to four DMRS antenna ports can be mapped on the same set of resource elements (Resource Element, RE), and different reference signals are mutually coded by means of Code Division Multiplexing (CDM). Orthogonal to avoid interference with each other. Multi-User Multiple-Input Multiple-Output (MU-MIMO) uses the orthogonal ports on the same resource to distinguish. For the terminal, it only needs to know that the data sent to itself is from the resource. Which ports are sent without knowing if other terminals are being scheduled at the same time. Since the same resource supports up to four orthogonal antenna ports, in the LTE-A system, up to four terminals are supported to perform space division multiplexing using orthogonal antenna ports.

In the New Radio (NR) system, the demodulation reference signal is enhanced. There are two types of DMRS antenna port configurations, each of which supports mapping of DMRS with 1 OFDM symbol and 2 OFDM symbols. .

FIG. 1 is a schematic diagram of configuration type 1. As shown in FIG. 1 , in configuration type 1, each subcarrier of each subcarrier in the frequency domain is the same group, and is divided into two groups. The antenna ports are orthogonalized by cyclic shifting (Cyclic Shift, CS) of the sequence of DMRSs on the same group. When one OFDM symbol is configured, each group maps the reference signals of at most 2 DMRS antenna ports. Therefore, the configuration type 1 of one OFDM symbol supports up to four orthogonal DMRS antenna ports. When two OFDM symbols are configured, the reference signals of up to four DMRS antenna ports are mapped in each group, and the orthogonality between the symbols is ensured by a Time Division Orthogonal CC (TD-OCC) of length 2, two Configuration Type 1 of OFDM symbols supports up to 8 DMRS antenna ports.

2 is a schematic diagram of configuration type 2, as shown in FIG. 2, in configuration type 2, continuous in the frequency domain 2 The subcarriers are grouped into three groups and are divided into three groups. When one OFDM symbol is configured, the reference signal of up to two DMRS antenna ports is mapped in each group, and the orthogonality is ensured by a Frequency Division Orthogonal CC (FD-OCC) of length 2. Therefore, 1 Configuration Type 2 of OFDM symbols supports up to 6 orthogonal DMRS antenna ports. When two OFDM symbols are configured, the reference signals of up to four DMRS antenna ports are mapped in each group, the orthogonality is maintained between the symbols by the TD-OCC of length 2, and the configuration type 2 of the two OFDM symbols supports up to 12 DMRS antennas. port.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

The inventors have found that the protocol specifies that up to eight orthogonal DMRS antenna ports support SU-MIMO transmission. Up to 12 orthogonal DMRS antenna ports support MU-MIMO transmission. According to the above description of the two types of DMRS configurations, the same resource supports up to 4 orthogonal DMRS antenna ports, which are code division multiplexed (configuration type 1: CS+2TD-OCC; configuration type 2: 2FD-OCC+) 2TD-OCC) maintains orthogonality. That is, when more than 4 antenna ports (more than 4 terminals) perform MU-MIMO transmission, if the symbols for transmitting the DMRS need to map data, the terminal needs to know that in addition to transmitting the antenna port of its own DMRS, What other resources are occupied by other terminals in order to achieve proper demapping and demodulation of the data.

Therefore, the indication of the number of DMRS antenna ports and the number of data transmission layers is complicated by the support of more DMRS antenna port mapping patterns in the NR, and the increase in the number of antenna ports and the enhancement of MU-MIMO transmission.

In order to solve at least one of the foregoing problems, an embodiment of the present invention provides a method, an apparatus, and a communication system for indicating an antenna port and a data layer number.

According to a first aspect of the embodiments of the present invention, a method for indicating an antenna port and a data layer number is provided, where the method includes:

The network device indicates, by using the first indication information in the common control signaling, the number of DMRS symbols actually transmitted in the frequency domain range of the signaling in the current time slot and/or the occupied CDM resource group.

According to a second aspect of the embodiments of the present invention, a method for determining an antenna port and a data layer number is provided, where the method includes:

The terminal device reads the specified common control signaling, and obtains the number of DMRS symbols actually transmitted in the frequency domain range of the signaling in the current time slot indicated by the common control signaling, and/or the occupied CDM resource group;

Determining, by the terminal device, a length of the terminal-specific control signaling that needs to be detected according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group;

The terminal device determines the data layer number and the antenna port number of the data transmitted to itself by reading the detected terminal-specific control signaling.

According to a third aspect of the present invention, a device for indicating an antenna port and a data layer is provided in a network device, where the device includes:

The first indication unit indicates, by using the first indication information in the common control signaling, the number of DMRS symbols actually transmitted in the frequency domain range of the signaling in the current time slot and/or the occupied CDM resource group.

According to a fourth aspect of the present invention, there is provided an apparatus for determining an antenna port and a data layer, configured in a terminal device, where the device includes:

a reading unit that reads the specified common control signaling, obtains the number of DMRS symbols actually transmitted in the frequency domain range of the signaling in the current time slot indicated by the common control signaling, and/or the occupied CDM Resource group

a first determining unit, configured to determine, according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group, a length of terminal-specific control signaling that needs to be detected;

And a second determining unit that determines the data layer number and the antenna port number of the data transmitted to the terminal device by reading the detected terminal-specific control signaling.

According to a fifth aspect of the embodiments of the present invention, there is provided a network device, wherein the network device comprises the apparatus of the foregoing third aspect.

According to a sixth aspect of the embodiments of the present invention, there is provided a terminal device, wherein the terminal device comprises the apparatus of the foregoing fourth aspect.

According to a seventh aspect of the embodiments of the present invention, there is provided a communication system comprising the terminal device of the foregoing sixth aspect and the network device of the foregoing fifth aspect.

According to a further aspect of the present invention, a computer readable program is provided, wherein when the program is executed in a network device, the program causes a computer to perform the method of the first aspect described above in the network device .

According to a further aspect of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the first aspect described above in a network device.

According to still another aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a terminal device, the program causes a computer to execute the method described in the foregoing second aspect in the terminal device .

According to a further aspect of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the aforementioned second aspect in a terminal device.

The beneficial effects of the embodiments of the present invention are: indicating the number of DMRS symbols and/or the CDM resource group by using common control signaling, and the terminal can determine the DMRS antenna port and the data layer number according to the same, thereby correctly demodulating and decoding the self. The data. The overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising"

DRAWINGS

The elements and features described in one of the figures or one embodiment of the embodiments of the invention may be combined with the elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

The accompanying drawings are included to provide a further understanding of the embodiments of the invention Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. In the drawing:

1 is a schematic diagram of DMRS configuration type 1;

2 is a schematic diagram of DMRS configuration type 2;

FIG. 3 is a schematic diagram of an application scenario of this embodiment;

4 is a schematic diagram showing a method of indicating an antenna port and a data layer number in Embodiment 1;

5 is a schematic diagram of a method of determining an antenna port and a data layer number of Embodiment 2;

6 is a schematic diagram of an antenna port and a data layer number indicating device of Embodiment 3;

7 is a schematic diagram of an apparatus for determining an antenna port and a data layer number of Embodiment 4;

8 is a schematic diagram of a network device of Embodiment 5;

9 is a schematic diagram of a terminal device of Embodiment 6.

Detailed ways

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiment of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "comprising," "having," or "an"

In the embodiments of the present invention, the singular forms "a", "the", "the", "the" and "the" It is to be understood that the singular In addition, the term "subject" should be understood to mean "based at least in part", and the term "based on" should be understood to mean "based at least in part on" unless the context clearly indicates otherwise.

In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

Moreover, the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, new wireless (NR, New Radio), etc., and/or others currently known or will be opened in the future Communication protocol.

In the embodiment of the present invention, the term "network device" refers to, for example, a device in a communication system that accesses a terminal device to a communication network and provides a service for the terminal device. The network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.

The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a Remote Radio Head (RRH). , Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" can refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of the present invention, the term "user equipment" (UE) or "Terminal Equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service. The user equipment may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.

The user equipment may include, but is not limited to, a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop computer, Cordless phones, smart phones, smart watches, digital cameras, and more.

For example, in a scenario such as an Internet of Things (IoT), the terminal device may be a device or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal. In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, and the like.

The scenario of the embodiment of the present invention is described below by way of example, but the present invention is not limited thereto.

FIG. 3 is a schematic diagram of a communication system according to an embodiment of the present invention. The terminal device and the network device are taken as an example. As shown in FIG. 3, the communication system 300 may include: a network device 301 and a terminal device 302. For the sake of simplicity, FIG. 3 is described by taking only one terminal device as an example. The network device 301 is, for example, a network device gNB of the NR.

In the embodiment of the present invention, an existing service or a service that can be implemented in the future can be performed between the network device 301 and the terminal device 302. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability low latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), and more.

The terminal device 302 can transmit data to the network device 301, for example, using an unlicensed transmission mode. The network device 301 can receive data sent by one or more terminal devices 302 and feed back information (for example, acknowledge ACK/non-acknowledgement NACK) information to the terminal device 302. The terminal device 302 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transfer or data retransmission.

Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

Example 1

This embodiment provides a method for indicating an antenna port and a data layer. The method is applied to a network device, such as a gNB (base station in the NR), etc. FIG. 4 is a schematic diagram of the method. Referring to FIG. 4, the method includes :

Step 401: The network device indicates, by using the first indication information in the common control signaling, the number of DMRS symbols actually sent in the frequency domain range of the signaling in the current time slot and/or the occupied CDM resource group.

In this embodiment, by indicating the number of DMRS symbols actually transmitted and/or the occupied CDM resource group, the terminal device that reads the common control signaling may be based on the actually transmitted DMRS symbol number and/or the foregoing The occupied CDM resource group determines the length of the terminal-specific control signaling to be detected, and determines the data layer number and the antenna port number of the data transmitted to itself by reading the detected terminal-specific control signaling. Therefore, the terminal device can perform terminal-specific control signaling detection in a targeted manner, effectively saving the overhead of the terminal-specific control signaling, and reducing the number of blind detections of the terminal-specific control signaling by the terminal device.

In this embodiment, the CDM resource group is defined as: a group of resources including multiple resource elements, and the resource group can simultaneously carry DMRS sequences of multiple antenna ports, and the DMRS sequences of the multiple antenna ports are mapped by CDM mode. On the resource group.

For example, in the DMRS configuration type 1, the CDM resource group is an RE of one sub-carrier, and the DMRS sequences of different antenna ports are mapped to the RE of each sub-carrier by CS. and also That is to say, in the DMRS configuration type 1, the DMRS sequences of different antenna ports are mapped to the REs of each subcarrier by CS, and the group of resources (REs of 1 subcarrier per interval) is called 1 CDM. The resource group, such as CDM group 1 and CDM group 2 shown in FIG.

For example, in DMRS configuration type 2, the CDM resource group is consecutive 2 REs of 4 subcarriers, and the DMRS sequences of different antenna ports are mapped to 2 consecutive REs of 4 subcarriers by OCC. . That is to say, in the DMRS configuration type 2, the DMRS sequences of different antenna ports are mapped to two consecutive REs of 4 subcarriers by OCC, and the group of resources (two consecutive REs of 4 subcarriers per interval) ) is a CDM resource group, such as CDM group 1, CDM group 2, and CDM group 3 as shown in FIG.

In this embodiment, the common control signaling may be signaling for indicating a mapping of a channel and a signal defined in the protocol within a time-frequency resource range of the signaling action. The mapping of the channel and the signal defined by the protocol belongs to the common information of a group of terminal devices receiving the common signaling.

For example, the indication content of the above common control signaling includes a reference signal CSI-RS for channel state measurement, a reference signal DMRS for data demodulation, and a common resource set CORESET (Common Resource Set) for controlling signaling detection. The mapping of signals and channels in the time-frequency range of signaling, that is, the number of REs and the number of REs occupied by the above channels and signals. After reading the common control signaling, the terminal can obtain the location of the channel, the signal, and the data on the time-frequency resource, that is, obtain the structural composition of the RE of the time-frequency resource.

In this embodiment, the indication of the CDM resource group may also be used as the implicit indication information that the data is multiplexed with the OFDM symbol occupied by the DMRS, that is, when the indicated occupied CDM resource group is a group of CDM resource groups or two groups of CDMs. When the resource group is implicitly indicated, the data symbols are carried on the REs of the undisclosed CDM resource group, that is, the data symbols and the DMRS exist in frequency division multiplexing on the OFDM symbols. When the indicated occupied CDM resource group is three groups of CDM resource groups, the data symbols are not mapped to the OFDM occupied by the DMRS regardless of whether the DMRS of other antenna ports is actually mapped on the REs of the CDM group 2 and the CDM group 3. Symbolically, the way in which data symbols and DMRS are time division multiplexed is implicitly indicated.

In this embodiment, the first indication information may be 2-bit information or 3-bit information.

For example, if all the terminal devices that read the common control signaling have the same DMRS configuration type and both are configuration type 1, the first indication information may be 2-bit information, where one bit is used to indicate the actual transmission. The number of DMRS symbols, and the other bit is used to indicate the occupied CDM resource group.

For another example, if all the terminal devices that read the common control signaling have the same DMRS configuration type, And all of the configuration type 2, the first indication information is 3-bit information, wherein one bit is used to indicate the number of actually transmitted DMRS symbols, and the other two bits are used to indicate the occupied CDM resource group.

For another example, if the DMRS configuration types of all the terminal devices that read the common control signaling are different, the first indication information is 3-bit information, where one bit is used to indicate the number of DMRS symbols actually sent, and another Two bits are used to indicate the occupied CDM resource group.

In this embodiment, if the protocol specifies that the DMRS configuration types configured by the terminal devices (referred to as terminal groups) that read the same common control signaling are the same, the length of the first indication information in the common control signaling will be configured. The type varies. The terminal device may determine the length of the common control signaling according to the configured DMRS configuration type to detect the common control signaling.

When the terminal group is configured with configuration type 1, since the configuration type 1 only includes 2 CDM groups, the length of the first indication information in the common control signaling is 2 bits, and the number of DMRS symbols indicates that 1 bit is occupied. For example, 1 symbol is represented by '0' and 2 symbols are indicated by '1'; the CDM group indicates occupation of 1 bit, for example, the '0' indicates that the first group of CDM groups are occupied, and the '1' indicates two groups of CDMs. Groups are occupied. As shown in Table 1.

Table 1 Configuring DMRS symbol number and CDM group number indication table of type 1

index	DMRS symbol number	Number of CDM groups
0	1	1
1	1	2
2	2	1
3	2	2

When the terminal group is configured with the configuration type 2, since the configuration type 2 includes three CDM groups, the length of the first indication information in the common control signaling is 3 bits, and the first bit indicates the number of DMRS symbols. For example, 1 symbol is represented by '0' and 2 symbols are indicated by '1'; the indication of the number of CDM groups occupies 2 bits, for example, the '1' indicates that the first group of CDM groups are occupied, and the '01' indicates that the CDM group 1 is occupied. And CDM group 2 is occupied, and the three CDM groups are occupied by '10', as shown in Table 2.

Table 2 DMRS symbol number and CDM group number indication table of configuration type 2

In this embodiment, if the protocol does not specify that the DMRS configuration type configured by the terminal device (referred to as a terminal group) that reads the same common control signaling is the same, the first indication information may include 3-bit information, the first one. The bit indicates the number of DMRS symbols, and the other two bits indicate the number of occupied CDM resource groups, as shown in Table 3.

Table 3 DMRS symbol number and CDM group number indication table

The foregoing embodiment is described by using the common control signaling to indicate the number of DMRS symbols and the occupied CDM resource group by using the first indication information, but the embodiment is not limited thereto. The common control signaling may indicate only the foregoing DMRS symbol number, or only the above-mentioned occupied resource group, and explicitly or implicitly indicate another parameter by other signaling or other configuration. In this case, The number of bits of the first indication information also changes accordingly.

In an embodiment of the embodiment, as shown in FIG. 4, the method may further include:

Step 402: The network device indicates, by using the second indication information in the terminal-specific control signaling, the data layer number and the antenna port number of the data transmitted to the terminal device.

In this embodiment, the second indication information is an indication index corresponding to the number of data layers and the antenna port number.

In this embodiment, the network device and the terminal device pre-arrange different data layer numbers and antenna port indication tables corresponding to different combinations of DMRS symbols and configuration types, and indicate data in each indication table by using different index values. The number of layers and the number of the antenna port. After the network device determines the data layer number and the antenna port number of the data transmitted to the terminal device, since the DMRS configuration type and the number of DMRS symbols of the terminal device are configured by the network device to the terminal device, The network device may determine the corresponding index by searching for the corresponding indication table, and indicate the index to the terminal device by using the second indication information, and the terminal device may configure the DMRS configuration type according to the network device. The number of DMRS symbols determines the data layer number and the antenna port indication table, and determines the data layer number and the antenna port number of the data transmitted to itself according to the above index and the indication table, so that the DMRS can be correctly read and channel estimation can be performed.

Tables 7 to 7 below are examples of data layer numbers and antenna port indication tables corresponding to different configuration types and DMRS symbol numbers, but this embodiment is not limited thereto, and the data layer number and the antenna port number may be Other values, where the reserved bits can also be used for other purposes, such as indicating other content.

Table 4 Data layer number and antenna port indication table corresponding to configuration type 1 of a DMRS symbol

Table 5 Data layer number and antenna port indication table corresponding to configuration type 1 of two DMRS symbols

Table 6 Data layer number and antenna port indication table corresponding to configuration type 2 of a DMRS symbol

Table 7 Number of data layers and antenna port indication table corresponding to configuration type 2 of two DMRS symbols

Different indication tables are pre-arranged by the combination of different DMRS symbol numbers and configuration types corresponding to the network device and the terminal device, and the length of the indication information (second indication information) combined with a certain configuration type and the DMRS symbol number is small. (For example, the configuration type 1 of one DMRS symbol) saves the overhead of terminal-specific control signaling, and the saved overhead can be used for the enhancement of terminal-specific control signaling coverage, and can also be used for other purposes.

In this embodiment, the network device may also configure the foregoing DMRS configuration type for the terminal device, for example, by using high-layer signaling, and the terminal device may determine, according to the DMRS configuration type configured by the network device, the number of the DMRS symbols. Which indicator is used, and the terminal device can perform other processing according to the DMRS configuration type configured by the network device, and details are not described herein again. In addition, the configuration of the DMRS configuration type is not limited in this embodiment, and reference may be made to the prior art.

In this embodiment, the network device may further configure a maximum value of the number of DMRS symbols, that is, a maximum number of DMRS symbols, for the terminal device, and the terminal device may configure the network device according to the maximum number of DMRS symbols and the foregoing step 401. The actual number of DMRS symbols transmitted is determined whether the data of the terminal device is transmitted within the range indicated by the common control signaling, thereby reducing the number of blind detections of the terminal-specific control signaling by the terminal device. The details will be explained in the following embodiments. In this embodiment, the network device may configure the maximum DMRS symbol number, for example, 1 symbol or 2 symbols, for the terminal device by using the high layer signaling according to the capability of the terminal device and the environment. This embodiment does not limit the specific configuration manner.

In this embodiment, the network device can configure the common control signaling that each terminal device needs to decode through high-level signaling, that is, group the terminal devices, and specify which common control signaling can be read by which terminal devices. This embodiment does not limit the configuration.

In this embodiment, the network device may further configure, for the terminal device, the number of maximum codewords that can be supported, and the terminal device may be configured according to the maximum number of codewords that the network device can support, and combined with the foregoing common control signaling. The content of the indication determines the length of the terminal-specific control signaling, which will be specifically described in the following embodiments.

Through the method of the embodiment, the number of DMRS symbols and the CDM resource group are indicated by common control signaling, and the terminal can determine the DMRS antenna port and the data layer number according to the same, thereby correctly demodulating and decoding the data belonging to itself. The overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 2

The embodiment provides a method for determining the number of the antenna port and the data layer, and the method is applied to the terminal device, which is the processing on the terminal side of the method corresponding to the first embodiment, and the same content as that of the embodiment 1 is not repeatedly described. . Figure 5 is a schematic diagram of the method, with reference to Figure 5, the method includes:

Step 501: The terminal device reads the specified common control signaling, and obtains the number of DMRS symbols actually transmitted in the frequency domain range included in the current time slot indicated by the common control signaling, and/or the occupied CDM resource group.

Step 502: The terminal device determines, according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group, the length of the terminal-specific control signaling that needs to be detected.

Step 503: The terminal device determines the data layer number and the antenna port number of the data transmitted to itself by reading the detected terminal-specific control signaling.

In this embodiment, as described in Embodiment 1, the network device indicates the foregoing DMRS symbol number and/or the occupied CDM resource group by using common control signaling, and the terminal device can obtain the foregoing by reading the common control signaling. information. Since the manner of indicating the common control signaling has been described in detail in Embodiment 1, the content thereof is incorporated herein, and details are not described herein again.

In an implementation manner of step 502, when the occupied CDM resource group is a group, or the occupied CDM resource group is two groups, but the actually transmitted DMRS symbol number is 1, the terminal device determines the terminal dedicated control signal. The length of the command does not include the number of relevant bits of the pre-set codeword.

In this embodiment, when the maximum number of codewords configured by the network device for the terminal device is 2, and the maximum number of layers supported by the combination of the number of DMRS symbols and the number of occupied CDM resource groups is not greater than 4, as shown in Table 8. The occupied CDM resource group is a group, or the occupied CDM resource group is two groups, but the actual number of DMRS symbols sent is 1, and the terminal considers that only one codeword is enabled for this transmission. Codeword 0, that is, codeword 1 is to disable. Therefore, the terminal device considers that the terminal-specific control signaling does not include information related to codeword 1 (the above-mentioned preset codeword), and detects the terminal-specific control signaling with a signaling length that does not include the number of bits associated with the codeword 1.

Table 8 Maximum number of supported layers in combination of configuration type, DMRS symbol number, and CDM group number

In another implementation of step 502, the terminal device determines the data layer number and the antenna port indication table according to the configured DMRS configuration type and the actually transmitted DMRS symbol number (the indication table 4-7 as described in Embodiment 1) And determining that the length of the terminal-specific control signaling includes the number of bits occupied by the determined indication table.

In the present embodiment, the number of bits occupied by different indication tables (such as the indication table 4-7 described in Embodiment 1) is different, and the terminal device determines which indication table is used according to the DMRS configuration type and the number of DMRS symbols. The number of bits occupied by the determined indication table is then included in the length of the terminal-specific control signaling.

In this embodiment, the length of the terminal-specific control signaling further includes the number of bits occupied by other indication information or control information. For details, refer to the prior art. This embodiment only describes differences from the prior art. .

In this embodiment, as described in Embodiment 1, the network device may further configure a maximum number of DMRS symbols for the terminal device, and the terminal device may further determine, according to the configured maximum number of DMRS symbols and the number of DMRS symbols actually sent. Whether there is data transmitted to itself.

In an embodiment, if the maximum number of DMRS symbols is less than the number of DMRS symbols actually sent, the terminal device determines that there is no data transmitted to itself, otherwise the terminal device determines that there is data transmitted to itself.

For example, when the maximum DMRS symbol number configured by the high layer signaling to the terminal device is 1, and the number of DMRS symbols indicating that the current transmission is 2 in the common control signaling, the terminal device may consider that the data is not indicated by the common control signaling. Intra-range transmission, so that terminal-specific control signaling related to downlink data scheduling is not detected. In other cases, the terminal device considers that there may be data transmitted to it, thereby reducing the number of blind detections of the terminal-specific control signaling by the terminal device.

In this embodiment, as described in Embodiment 1, the terminal device may further determine whether data is mapped on the OFDM symbol occupied by the DMRS according to the occupied CDM resource group.

In an embodiment, if the occupied CDM resource group is one group or two groups, the terminal device determines that data is mapped on the RE of the CDM resource group that is not indicated on the symbol occupied by the DMRS; If the occupied CDM resource group is three groups, the terminal device determines that there is no mapping data on the symbols occupied by the DMRS. Thus, the occupied CDM resource group indicated by the common control signaling implicitly indicates the multiplexing manner of the DMRS symbol and the data symbol.

In this embodiment, after determining the length of the terminal-specific control signaling by step 502, in step 503, the terminal device may detect the terminal-specific control signaling according to the length of the terminal-specific control signaling, and the detection method Without limitation, the number of the data layer and the indication index corresponding to the antenna port number indicated by the terminal-specific control signaling are obtained, and the data layer number and the antenna are determined according to the configured DMRS configuration type and the number of the DMRS symbols. The port indication table finally determines the data layer number and the antenna port number according to the indication index and the indication table, thereby correctly reading the DMRS and performing channel estimation.

By the method of the embodiment, the common information of the group of terminals, that is, the number of DMRS symbols and the number of occupied CDM groups are extracted and displayed in the common control signaling, so that the information further becomes the codeword enable state and the downlink shared channel data. Implicit indication signaling for rate matching. The data layer number and the antenna port number indication table are separately configured by combining different DMRS configuration types and DMRS symbol numbers, and the codeword enable state is combined, thereby effectively saving the overhead of the terminal dedicated control signaling. And by comparing the number of configured symbols with the number of indicator symbols, the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 3

This embodiment provides an indication device for an antenna port and a data layer number, and the device may be configured in a network device, such as a gNB (a base station in the NR). Since the principle of solving the problem is similar to the method of the first embodiment, the specific implementation can refer to the implementation of the method of the first embodiment, and the details are not repeated.

6 is a schematic diagram of the composition of the device. Referring to FIG. 6, the antenna port and the data layer indicating device 600 includes: a first indicating unit 601, which indicates the current time slot by using the first indication information in the common control signaling. The number of DMRS symbols actually transmitted in the frequency domain of the signaling action and/or the occupied CDM resource group.

In this embodiment, the terminal device that reads the common control signaling determines the length of the terminal-specific control signaling that needs to be detected according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group, and The number of data layers and the antenna port number of the data transmitted to itself are determined by reading the detected terminal-specific control signaling.

In this embodiment, the first indication information is 2-bit information or 3-bit information. If the DMRS configuration types of all the terminal devices that read the common control signaling are the same, and both are configuration type 1, the first indication information is 2-bit information, where one bit is used to indicate the actually sent DMRS. The number of symbols, the other bit is used to indicate the occupied CDM resource group; if all the terminal devices that read the common control signaling have the same DMRS configuration type and both are configuration type 2, the first indication The information is 3-bit information, wherein one bit is used to indicate the number of actually transmitted DMRS symbols, and the other two bits are used to indicate the occupied CDM resource group; if all terminal devices of the common control signaling are read The DMRS configuration type is different, and the first indication information is 3-bit information, where one bit is used to indicate the number of actually transmitted DMRS symbols, and the other two bits are used to indicate the occupied CDM resource group.

In this embodiment, the CDM resource group is a resource group that maps DMRS sequences of different antenna ports and the DMRS sequences of the different antenna ports are mapped by the CDM manner. In DMRS configuration type 1, the CDM resource group is an RE of one sub-carrier, and a reference signal sequence of different DMRS antenna ports is mapped to the RE of each sub-carrier by CS. In the DMRS configuration type 2, the CDM resource group is consecutive 2 REs of 4 subcarriers, and the reference signal sequence of different DMRS antenna ports is mapped to the consecutive 2 REs of the 4 subcarriers by OCC. on.

In this embodiment, as shown in FIG. 6, the indication device 600 of the antenna port and the data layer may further include: a second indication unit 602, which is indicated by the second indication information in the terminal-specific control signaling. The data layer number and antenna port number of the data of the terminal device.

In this embodiment, the second indication information is an indication index corresponding to the number of data layers and an antenna port number, and the terminal device determines the number of data layers according to the configured DMRS configuration type and the number of the DMRS symbols. And an antenna port indication table, and determining the data layer number and the antenna port number according to the indication index and the indication table.

In this embodiment, as shown in FIG. 6, the antenna port and the data layer number indicating apparatus 600 may further include: a configuration unit 603, which may configure the foregoing DMRS configuration type, the maximum number of supported DMRS symbols, and the maximum supported code. The number of words, etc., the specific configuration method is as described in Embodiment 1, and details are not described herein again.

In this embodiment, as shown in FIG. 6, the antenna port and the data layer number indicating device 600 may further include: a storage unit 604, which can store various forms and/or obtained various information. This embodiment is correct The specific storage method is not limited.

Through the apparatus of the embodiment, the overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 4

This embodiment provides an apparatus for determining an antenna port and a data layer number, and the apparatus may be configured in a terminal device. Since the principle of solving the problem is similar to the method of the second embodiment, the specific implementation can refer to the implementation of the method of the second embodiment, and the description of the same portions will not be repeated.

FIG. 7 is a schematic diagram of the composition of the device. Referring to FIG. 7, the antenna port and data layer determining apparatus 700 includes: a reading unit 701, a first determining unit 702, and a second determining unit 703. The reading unit 701 can read Obtaining the specified common control signaling, obtaining the number of DMRS symbols actually transmitted in the frequency domain range included in the current time slot indicated by the common control signaling, and/or the occupied CDM resource group; the first determining unit 702 may Determining a length of the terminal-specific control signaling that needs to be detected according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group; the second determining unit 703 may determine by detecting the detected terminal-specific control signaling The number of data layers and the antenna port number of the data transmitted to the terminal device.

In an embodiment of the present embodiment, the first determining unit 702 may be in the group of the occupied CDM resource group, or the occupied CDM resource group is two groups but the number of the actually transmitted DMRS symbols When it is 1, it is determined that the length of the terminal-specific control signaling does not include the number of relevant bits of the preset codeword.

In another embodiment of the present embodiment, the first determining unit 702 may determine the data layer number and the antenna port indication table according to the DMRS configuration type configured by the terminal device and the actually transmitted DMRS symbol number, and determine The length of the terminal-specific control signaling includes the number of bits occupied by the indication table.

In this embodiment, as shown in FIG. 7, the antenna port and the data layer number determining apparatus 700 may further include: a third determining unit 704, which may be configured according to the maximum DMRS symbol number configured by the terminal device, and the The number of DMRS symbols actually transmitted determines whether there is data transmitted to the terminal device. For example, the third determining unit 704 may determine that there is no data transmitted to the terminal device when the maximum number of DMRS symbols is smaller than the actually transmitted DMRS symbol number, and otherwise determine that there is data transmitted to the terminal device. .

In this embodiment, as shown in FIG. 7, the determining device 700 for the antenna port and the data layer may further include: a fourth determining unit 705, which may determine, according to the occupied CDM resource group, the DMRS Whether data is mapped on the OFDM symbol. For example, the fourth determining unit 705 can be in the occupied CDM. When the resource group is 1 or 2 groups, it is determined that data is mapped on the RE of the CDM resource group that is not indicated on the symbol occupied by the DMRS; when the occupied CDM resource group is three groups, the DMRS is determined. There is no mapping data on the occupied symbols.

In this embodiment, the second determining unit 703 may first detect the terminal-specific control signaling according to the length of the terminal-specific control signaling, and obtain the data layer number indicated by the terminal-specific control signaling. And an indication index corresponding to the antenna port number; determining a data layer number and an antenna port indication table according to the DMRS configuration type and the DMRS symbol number configured by the terminal device; and finally determining, according to the indication index and the indication table, The number of data layers and the antenna port number.

In this embodiment, as shown in FIG. 7, the determining device 700 for the antenna port and the data layer may further include: a detecting unit 706, which can detect the terminal specific control signaling, and the specific detection in this embodiment The method is not limited and can refer to the prior art.

In this embodiment, as shown in FIG. 7, the antenna port and data layer number determining apparatus 700 may further include: a storage unit 707, which can store various forms and/or acquired various information. This embodiment does not limit the specific storage manner.

Through the apparatus of the embodiment, the overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 5

The embodiment of the present invention further provides a network device, such as a gNB (base station in NR), and the like, wherein the network device includes the antenna port and the data layer number indicating device according to Embodiment 3.

FIG. 8 is a schematic structural diagram of an embodiment of a network device according to an embodiment of the present invention. As shown in FIG. 8, network device 800 can include a central processing unit (CPU) 801 and memory 802; and memory 802 is coupled to central processor 801. The memory 802 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 801 to receive various information transmitted by the terminal device and to transmit various information to the terminal device.

In one embodiment, the functions of the antenna port and the data layer indicating device described in Embodiment 3 may be integrated into the central processing unit 801, and the antenna port and data layer described in Embodiment 3 are implemented by the central processing unit 801. The function of the number indicating means, wherein the functions of the indicating means for the antenna port and the number of data layers are incorporated herein, and will not be described again.

In another embodiment, the antenna port and the data layer number indicating device of Embodiment 3 may be configured separately from the central processing unit 801. For example, the antenna port and the data layer number indicating device may be configured to be connected to the central processing unit 801. The chip is controlled by the central processing unit 801 to implement the function of the antenna port and the data layer indicating device.

In addition, as shown in FIG. 8, the network device 800 may further include: a transceiver 803, an antenna 804, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 800 does not have to include all the components shown in FIG. 8; in addition, the network device 800 may also include components not shown in FIG. 8, and reference may be made to the prior art.

Through the network device of the embodiment, the overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 6

The embodiment of the present invention further provides a terminal device, where the terminal device includes the antenna port and the data layer determining device according to Embodiment 4.

FIG. 9 is a schematic diagram of the composition of a terminal device according to an embodiment of the present invention. As shown in FIG. 9, the terminal device 900 can include a central processor 901 and a memory 902; the memory 902 is coupled to the central processor 901. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functions of the antenna port and the data layer determining apparatus of Embodiment 4 may be integrated into the central processing unit 901, and the central processing unit 901 implements the antenna port and the data layer number described in Embodiment 4. The function of the apparatus is determined, wherein the functions of the determining means for the antenna port and the number of data layers are incorporated herein, and are not described herein again.

In another embodiment, the determining device for the antenna port and the data layer number of Embodiment 4 may be configured separately from the central processing unit 901. For example, the determining device of the antenna port and the data layer number may be configured to be connected to the central processing unit 901. The chip is controlled by the central processing unit 901 to implement the functions of the antenna port and the data layer determining device.

As shown in FIG. 9, the terminal device 900 may further include: a communication module 903, an input unit 904, an audio processing unit 905, a display 906, and a power supply 907. It should be noted that the terminal device 900 does not necessarily have to include all the components shown in FIG. 9; further, the terminal device 900 may further include a portion not shown in FIG. For the piece, reference can be made to the prior art.

As shown in FIG. 9, central processor 901, also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of terminal devices 900. The operation of the part.

The memory 902 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The above configuration-related information can be stored, and a program for executing the related information can be stored. And the central processing unit 901 can execute the program stored in the memory 902 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of terminal device 900 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.

Through the terminal device of the embodiment, the overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Example 7

The embodiment of the present invention further provides a communication system, which includes a network device and a terminal device. The network device is, for example, the network device 800 described in Embodiment 5. The terminal device is, for example, the terminal device 900 described in Embodiment 6.

In this embodiment, the network device may be, for example, a gNB in the NR, which includes the conventional components and functions of the network device in addition to the functions of the indication device including the antenna port and the data layer number described in Embodiment 3. The description of Embodiment 5 is omitted here.

In this embodiment, the terminal device is, for example, a UE served by the gNB, and includes the conventional components and functions of the terminal device, in addition to the functions of the determining device including the antenna port and the data layer number described in Embodiment 4. As described in Example 6, it will not be described here.

Through the communication system of the embodiment, the overhead of the terminal-specific control signaling is effectively saved, and the number of blind detections of the terminal-specific control signaling by the terminal device is reduced.

Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a network device, the program causes a computer to execute the method described in Embodiment 1 in the network device.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer is The reading program causes the computer to perform the method described in Embodiment 1 in the network device.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a terminal device, the program causes a computer to execute the method described in Embodiment 2 in the terminal device.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the method described in Embodiment 2 in a terminal device.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in FIG. 6 and/or one or more combinations of functional block diagrams (eg, first indicating unit, second indicating unit, etc.) may correspond to a computer program flow. Each software module can also correspond to each hardware module. These software modules may correspond to the respective steps shown in FIG. 4, respectively. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a larger capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. Functional side described with reference to the drawings One or more of the blocks and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, and a communication with a DSP. One or more microprocessors or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims (15)

1. An apparatus for indicating an antenna port and a data layer is configured in a network device, where the device includes:

   The first indication unit indicates, by using the first indication information in the common control signaling, the number of DMRS symbols actually transmitted in the frequency domain range of the signaling in the current time slot and/or the occupied CDM resource group.
2. The apparatus according to claim 1, wherein the terminal device that reads the common control signaling determines a terminal-specific control signal that needs to be detected according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group. The length of the command, and the number of data layers and the antenna port number of the data transmitted to itself are determined by reading the detected terminal-specific control signaling.
3. The apparatus according to claim 1, wherein said first indication information is 2-bit information or 3-bit information.
4. The device according to claim 3, wherein

   If the DMRS configuration types of all the terminal devices that read the common control signaling are the same, and both are configuration type 1, the first indication information is 2-bit information, where one bit is used to indicate the actually sent DMRS. The number of symbols, another bit is used to indicate the occupied CDM resource group;

   If the DMRS configuration types of all the terminal devices that read the common control signaling are the same, and both are configuration type 2, the first indication information is 3-bit information, where one bit is used to indicate the actually sent DMRS. The number of symbols, the other two bits are used to indicate the occupied CDM resource group;

   If the DMRS configuration types of all the terminal devices that read the common control signaling are different, the first indication information is 3-bit information, where one bit is used to indicate the number of actually transmitted DMRS symbols, and the other two The bits are used to indicate the occupied CDM resource group.
5. The apparatus of claim 1 wherein said apparatus further comprises:

   And a second indication unit, which indicates, by the second indication information in the terminal-specific control signaling, a data layer number and an antenna port number of the data transmitted to the terminal device.
6. The apparatus according to claim 5, wherein the second indication information is an indication index corresponding to the number of data layers and an antenna port number, and the terminal device according to the configured DMRS configuration type and the DMRS symbol The number of data layers and the antenna port indication table are determined, and the number of data layers and the antenna port number are determined according to the indication index and the indication table.
7. An apparatus for determining an antenna port and a data layer is configured in a terminal device, where the device includes:

   a reading unit, which reads the specified common control signaling, obtains the number of DMRS symbols actually transmitted in the frequency domain range included in the current time slot indicated by the common control signaling, and/or the occupied CDM resource group;

   a first determining unit, configured to determine, according to the actually transmitted DMRS symbol number and/or the occupied CDM resource group, a length of terminal-specific control signaling that needs to be detected;

   And a second determining unit that determines the data layer number and the antenna port number of the data transmitted to the terminal device by reading the detected terminal-specific control signaling.
8. The apparatus according to claim 7, wherein the first determining unit is a group of the occupied CDM resource groups, or the occupied CDM resource group is two groups but the actually sent DMRS symbol When the number is 1, it is determined that the length of the terminal-specific control signaling does not include the number of related bits of the preset codeword.
9. The apparatus according to claim 7, wherein the first determining unit determines a data layer number and an antenna port indication table according to a DMRS configuration type configured by the terminal device and the actually transmitted DMRS symbol number, and determines the location The length of the terminal-specific control signaling includes the number of bits occupied by the indication table.
10. The apparatus of claim 7 wherein said apparatus further comprises:

    And a third determining unit that determines whether there is data transmitted to the terminal device according to the maximum DMRS symbol number configured by the terminal device and the actually transmitted DMRS symbol number.
11. The apparatus according to claim 10, wherein the third determining unit determines that there is no data transmitted to the terminal device when the maximum DMRS symbol number is smaller than the actually transmitted DMRS symbol number, otherwise determining There is data transmitted to the terminal device.
12. The apparatus of claim 7 wherein said apparatus further comprises:

    And a fourth determining unit, configured to determine, according to the occupied CDM resource group, whether data is mapped on the OFDM symbol occupied by the DMRS.
13. The apparatus according to claim 12, wherein the fourth determining unit determines, when the occupied CDM resource group is 1 or 2 groups, the CDM resource group that is not indicated on the symbol occupied by the DMRS. The data is mapped on the RE; when the occupied CDM resource group is three groups, it is determined that there is no mapping data on the symbols occupied by the DMRS.
14. The apparatus of claim 7, wherein the second determining unit comprises:

    a detection module, which detects the terminal-specific control signaling according to the length of the terminal-specific control signaling, and obtains an indication index corresponding to the data layer number and the antenna port number indicated by the terminal-specific control signaling;

    a first determining module, configured to determine a data layer number and an antenna port indication table according to the DMRS configuration type configured by the terminal device and the number of the DMRS symbols;

    And a second determining module, configured to determine the data layer number and the antenna port serial number according to the indication index and the indication table.
15. A communication system, wherein the communication system comprises a network device and a terminal device, the network device comprising the device according to any one of claims 1-6, the terminal device comprising any one of claims 7-14 The device described.

Images