TWI712296B - Method and device for determining code word mapping mode - Google Patents

Abstract

The present invention provides a method and device for determining a codeword mapping mode. In the field of communication technology, the method includes: a network side device determines the number of demodulation reference signal port groups DMRS port groups occupied by downlink transmission data sent to a terminal, and N is greater than Or equal to 1. If the network-side device determines that the codeword transmission mode corresponding to the downlink transmission data is dual-codeword transmission, the network-side device determines the downlink transmission data corresponding to the number of DMRS port groups N occupied by the downlink transmission data The code word mapping method. The number of DMRS port groups actually occupied by a downlink data channel is used to determine which mapping method to use, which can take into account the transmission quality of different transmission points, thereby reducing the performance loss of downlink data transmission.

Description

Method and device for determining code word mapping mode

The invention belongs to the field of communication technology, and particularly relates to a method and device for determining a codeword mapping mode.

Mobile and broadband have become the development direction of modern communication technology. 5G, the fifth-generation mobile phone mobile communication standard, also known as the fifth-generation mobile communication technology, is also an extension after 4G. As the main direction of the development of the new generation of information and communication, 5G will penetrate into all fields of the future society, and build a comprehensive information ecosystem with users as the center.

MIMO technology can increase the peak rate (or peak spectral efficiency) through the parallel transmission of data in the spatial domain. In theory, according to the channel quality of each equivalent data transmission channel in the MIMO link, the corresponding modulation and coding scheme (Modulation and Coding Scheme, MCS) can be selected to optimize the throughput. Similar to the LTE system, in the design process of the NR MIMO system, one of the first problems faced is the selection of codeword mapping methods. This problem has largely affected the design of many physical layer technical solutions.

The codeword mapping method used in the prior art is a peer-to-peer mapping method, that is, the number of layers corresponding to each codeword is as equal as possible. When the number of layers is even, the number of layers of each codeword is the same; when the number of layers is odd, the number of layers of codeword 0 is one less than codeword 1.

However, in the R-16 standardization work, the coordinated multipoint transmission technology is still an important technical means in the NR system, and the downlink data is usually transmitted through multiple transmission points/multiple transmission planes. Using the codeword mapping method in the prior art, because the transmission quality of each transmission point is not balanced, the mapping effect is affected, and the performance loss of downlink data transmission is caused.

The present invention provides a method for determining the codeword mapping mode, which is used to solve the problem of the unbalanced transmission quality of each transmission point in the prior art, which affects the mapping effect and causes the performance loss of downlink data transmission.

The embodiment of the present invention provides a method for determining a codeword mapping method, including: the network side device determines the number N of demodulation reference signal port groups DMRS port groups occupied by the downlink transmission data sent to the terminal, and N is greater than or equal to 1; The network side device determines that the codeword transmission mode corresponding to the downlink transmission data is double codeword transmission, and the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data.

In the embodiment of the present invention, the network side device determines the codeword mapping mode by the number of DMRS port groups actually occupied by a data channel. Compared with the standardized codeword mapping mode used in the prior art, the transmission of different transmission points can be considered. Quality, thereby reducing the performance loss of downlink data transmission.

Optionally, the network side device determining the number of DMRS port groups occupied by the downlink transmission data sent to the terminal includes: the network side device determines the number of DMRS port groups occupied by the downlink transmission data according to at least one of the following information Quantity; the information includes: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

In the embodiment of the present invention, the network side equipment can determine the number of DMRS port groups occupied by the downlink transmission data through various kinds of information, and these information can be obtained by the network side or reported by the terminal side.

Optionally, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, the method further includes: the network side device receiving the uplink signal sent by the terminal to the at least one transmission point; the network side device The uplink signal is measured to determine the number of transmission layers supported by each transmission point.

In the embodiment of the present invention, if the number of transmission layers supported by each transmission point is determined by the network side device, the network side device needs to first receive the uplink signal sent by the terminal, and determine the number of transmission layers supported by each transmission point based on the uplink signal.

Optionally, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, the method further includes: the network side device receives the channel status information CSI reported by the terminal, and the CSI includes each transmission point The number of transmission layers supported; the number of transmission layers supported by each transmission point is obtained by the terminal measuring the downlink signal sent by the network side device through the at least one transmission point.

In the embodiment of the present invention, if the number of transmission layers supported by each transmission point is determined by the terminal, the network side device needs to first receive the CSI sent by the terminal, and determine the transmission according to the number of transmission layers supported by each transmission point carried in the CSI. The number of DMRS port groups occupied by the downlink transmission data to the terminal.

Optionally, before the network-side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: the network-side device receives a recommendation message reported by the terminal, and the recommendation message includes the recommended DMRS port The number of groups, and/or the recommended codeword mapping mode; the recommended number of DMRS port groups, and/or the recommended codeword mapping mode is the downlink sent by the terminal to the at least one transmission point according to the network side device The signal is determined after measurement.

In the embodiment of the present invention, the network side device may also determine the number of DMRS port groups occupied by the downlink transmission data according to the recommended number of DMRS port groups in the recommendation message reported by the terminal and/or the recommended codeword mapping method.

Optionally, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: the network side device determines that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

In the embodiment of the present invention, if the network side device determines that the transmission layer of the downlink shared channel PDSCH is equal to 1, that is, double codeword transmission cannot be performed, so the premise of the method for determining the codeword mapping method is that the number of transmission layers of the downlink shared channel PDSCH is greater than 1. .

Optionally, the network side device determining the number of DMRS port groups occupied by the downlink transmission data sent to the terminal includes: if the network side device determines that the number of transmission layers supported by each transmission point is greater than or equal to 1, then determining the The number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2; if the network side device determines that the number of transmission layers supported by only one transmission point is greater than or equal to 1, it determines that the number of DMRS port groups occupied by the downlink transmission data is 1.

In the embodiment of the present invention, the network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the number of layers supported by each transmission point, that is, the network side equipment can determine the codeword mapping method according to the transmission quality of each transmission point .

Optionally, before the network side device determines the number N of demodulation reference signal port groups DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: the network side device determines that the number of transmission layers of the PDSCH is greater than one.

In the embodiment of the present invention, if it is determined that the number of transmission layers of the PDSCH is equal to 1, the single-codeword single-layer transmission in the prior art is used for transmission.

Optionally, the codeword mapping mode corresponding to the downlink transmission data includes: mapping mode I and mapping mode II; in the mapping mode I, if the number of transmission layers of the PDSCH is an even number, the transmission layer corresponding to each codeword If the number of transmission layers of the PDSCH is an even number but an odd number, the number of transmission layers of codeword 0 is one less than the number of transmission layers of codeword 1. In this mapping method II, N0+N1=the number of transmission layers of PDSCH, Among them, N0 is greater than or equal to 1, N1 is greater than or equal to 1, N0 is the number of transmission layers of codeword 0, and N1 is the number of transmission layers of codeword 1.

In the embodiment of the present invention, the mapping method I is as equivalent as possible, while the mapping method II does not limit the number of transmission layers corresponding to two codewords. It can be a peer-to-peer mapping method or a non-equivalent mapping method. The mapping method.

Optionally, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number of DMRS port groups occupied by the downlink transmission data, including: if the network side device determines the DMRS port group occupied by the downlink transmission data If the number is greater than or equal to 2, it is determined that the codeword mapping mode corresponding to the downlink transmission data is mapping mode II.

In the embodiment of the present invention, when it is determined that the number of DMRS port groups is greater than or equal to 2, in order to consider the channel conditions of different DMRS port groups corresponding to each codeword, the codeword mapping mode can be directly determined as mapping mode II.

Optionally, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number of DMRS port groups occupied by the downlink transmission data, including: if the network side device determines the DMRS port group occupied by the downlink transmission data If the number is equal to 2, it is determined whether the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, which is determined by the network side device according to the number of transmission layers of the PDSCH; if the network side device determines two DMRS If the number of transmission layers corresponding to the port group meets the preset rule, it is determined that the codeword mapping mode corresponding to the downlink transmission data is mapping mode II.

In the embodiment of the present invention, when the number of DMRS port groups is determined to be greater than or equal to 2, the number of transmission layers corresponding to the two DMRS port groups is determined, and if the preset rules are met, the codes are determined according to the channel conditions of different DMRS port groups Word mapping method.

Optionally, the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, where the value range of the elements in the preset set is [1,...,RI_MAX], and the RI_MAX is The maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2.

Optionally, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data, including: if the network side device determines the DMRS port group occupied by the downlink transmission data If the number is equal to 1, the codeword mapping mode corresponding to the downlink transmission data is determined to be mapping mode I according to the number of transmission layers of the PDSCH.

In the embodiment of the present invention, if the number of DMRS port groups occupied by the downlink transmission data is equal to 1, then two codewords are transmitted through one DMRS port group, and the mapping method I is as equivalent as possible for mapping.

Optionally, after the network-side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number of DMRS port groups occupied by the downlink transmission data, the method further includes: the network-side device uses signaling mode to map the codeword Or implicitly transfer to the terminal, so that the terminal demodulates the data according to the codeword mapping method.

In the embodiment of the present invention, after determining the codeword mapping mode, the network side device sends the codeword mapping mode to the terminal, and the terminal performs data analysis according to the determined codeword mapping mode.

Optionally, each DMRS port in the DMRS port group has a QCL relationship.

In the embodiment of the present invention, the large-scale parameters of the reference signal channel of each DMRS port in the DMRS port group are consistent.

An embodiment of the present invention also provides a method for determining a codeword mapping mode. The method includes: a network side device receives a recommendation message reported by a terminal, and the recommendation message includes a recommended number of DMRS port groups and/or a recommended codeword mapping mode ; The recommended number of DMRS port groups and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through at least one transmission point; the network side device is determined according to the recommended DMRS The number of port groups and/or the recommended codeword mapping mode determines the codeword mapping mode for downlink transmission data.

In the embodiment of the present invention, the network side device determines the code word mapping mode of the downlink transmission data according to the recommended number of DMRS port groups reported by the terminal and/or the recommended code word mapping mode, that is, the network side device can determine the code word mapping mode of the downlink transmission data according to the recommendation reported by the terminal The message determines the transmission quality of each transmission point, and determines different codeword mapping methods according to different transmission qualities. Compared with the prior art, the transmission quality of different transmission points can be considered, thereby reducing the performance loss of downlink data transmission.

Optionally, the network side device determines the code word mapping mode of the downlink transmission data according to the recommended number of DMRS port groups and/or the recommended code word mapping mode, including: the network side device according to the recommended DMRS port group The number, the recommended codeword mapping method, and the implementation configuration parameter determine the codeword mapping method of the downlink transmission data, wherein the implementation configuration parameter is determined according to the implementation method of the network side device.

In the embodiment of the present invention, in addition to determining the codeword mapping mode according to the number of DMRS port groups recommended by the terminal and the recommended codeword mapping mode, the network side device also determines the codeword of the downlink transmission data according to the implementation mode of the network side device Mapping method.

Optionally, the network-side device determines the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and implementation configuration parameters, including: The number of DMRS port groups, the recommended codeword mapping mode, and the implementation configuration parameters determine the codeword mapping mode of the downlink transmission data and the number of DMRS port groups occupied by the downlink transmission data.

In the embodiment of the present invention, in addition to determining the codeword mapping mode according to the recommended message reported by the terminal, the network side device can also determine the number of DMRS port groups occupied by the downlink transmission data according to the recommended message.

The present invention also provides a method for determining a codeword mapping mode, including: a terminal receives a downlink signal sent by a network side device through at least one transmission point; the terminal determines measurement data according to the downlink signal; the terminal reports the measurement data to the The network-side equipment enables the network-side equipment to determine the codeword mapping mode corresponding to the downlink transmission data according to the measurement data.

In the embodiment of the present invention, the terminal determines the measurement data based on the downlink signal, and reports the measurement data to the network side device. The network side device determines the codeword mapping method based on the measurement data, and can use the codeword mapping method determined by the network side device Compared with the prior art, data demodulation can take into account the transmission quality of different transmission points, thereby reducing the performance loss of downlink data transmission.

Optionally, the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

In the embodiment of the present invention, the measurement data reported by the terminal may be the number of transmission layers supported by each transmission point measured by the terminal, or the number of DMRS port groups and the codeword mapping method determined by the terminal. The terminal uploads at least one of the above information Report to the network side equipment so that the network side equipment determines the code word mapping method based on the above information.

Optionally, the measurement data is the number of transmission layers supported by each transmission point, and the terminal reporting the measurement data to the network side device includes: the terminal adds the number of transmission layers supported by each transmission point to the channel status information CSI, and report the CSI to the network side device.

In the embodiment of the present invention, the terminal adds the measurement data to the CSI information, and then reports the CSI information to the network side device.

Optionally, before the terminal receives the downlink signal sent by the network side device through at least one transmission point, the method further includes: the terminal determines that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

In the embodiment of the present invention, if it is determined that the transmission layer of the downlink shared channel PDSCH is equal to 1, only one codeword can be transmitted, and the peer-to-peer mapping method corresponding to the specification in the prior art is used for transmission.

An embodiment of the present invention also provides an apparatus for determining a codeword mapping mode, including: a DMRS port group quantity determining unit for determining the number of demodulation reference signal port groups DMRS port groups occupied by downlink transmission data sent to the terminal N, N Greater than or equal to 1. The codeword mapping mode determining unit is used to determine that the codeword transmission mode corresponding to the downlink transmission data is dual codeword transmission, then the network side device will occupy the number of DMRS port groups N by the downlink transmission data Determine the codeword mapping mode corresponding to the downlink transmission data.

In the embodiment of the present invention, the codeword mapping mode is determined according to the number of DMRS port groups occupied by downlink data, and the codeword mapping mode used is determined by the number of DMRS port groups actually occupied by a data channel, which is consistent with the specifications used in the prior art Compared with determining the codeword mapping method, the transmission quality of different transmission points can be considered, thereby reducing the performance loss of downlink data transmission.

Optionally, the DMRS port group quantity determining unit is specifically configured to determine the quantity of DMRS port groups occupied by the downlink transmission data according to at least one of the following information; the information includes: the number of DMRS port groups recommended by the terminal , The codeword mapping method recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, the DMRS port group quantity determining unit is further configured to: receive an uplink signal sent by the terminal to the at least one transmission point; measure the uplink signal to determine the number of transmission layers supported by each transmission point.

Optionally, the DMRS port group quantity determining unit is further configured to: receive channel state information CSI reported by the terminal, the CSI includes the number of transmission layers supported by each transmission point; the number of transmission layers supported by each transmission point is The terminal measures the downlink signal sent by the network side device to the at least one transmission point.

Optionally, the unit for determining the number of DMRS port groups is further configured to: receive a recommendation message reported by the terminal, the recommendation message including the number of recommended DMRS port groups, and/or the recommended codeword mapping mode; the recommendation The number of DMRS port groups, and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through the at least one transmission point.

Optionally, the unit for determining the number of DMRS port groups is specifically configured to: if it is determined that the number of transmission layers supported by each transmission point is greater than or equal to 1, then determining that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2. ; If it is determined that the number of transmission layers supported by only one transmission point is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is 1.

Optionally, the unit for determining the number of DMRS port groups is further used to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

Optionally, the codeword mapping mode corresponding to the downlink transmission data includes: mapping mode I and mapping mode II; in the mapping mode I, if the number of transmission layers of the PDSCH is an even number, the transmission layer corresponding to each codeword If the number of transmission layers of the PDSCH is an even number but an odd number, the number of transmission layers of codeword 0 is one less than the number of transmission layers of codeword 1. In this mapping method II, N0+N1=the number of transmission layers of PDSCH, Among them, N0 is greater than or equal to 1, N1 is greater than or equal to 1, N0 is the number of transmission layers of codeword 0, and N1 is the number of transmission layers of codeword 1.

Optionally, the codeword mapping mode determining unit is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, determine that the codeword transmission mode corresponding to the downlink transmission data is mapping mode II .

Optionally, the codeword mapping mode determining unit is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, determine whether the number of transmission layers corresponding to the two DMRS port groups meets a preset Rule, the preset rule is determined by the network side device according to the number of transmission layers of the PDSCH; if it is determined that the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, the codeword mapping corresponding to the downlink transmission data is determined The method is mapping method II.

Optionally, the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, where the value range of the elements in the preset set is [1,...,RI_MAX], and the RI_MAX is The maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2.

Optionally, the codeword mapping mode determining unit is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is equal to 1, then determine the codeword mapping corresponding to the downlink transmission data according to the number of transmission layers of the PDSCH The method is mapping method I.

Optionally, the codeword mapping mode determining unit is further configured to: transmit the codeword mapping mode to the terminal through signaling or implicitly, so that the terminal can demodulate data according to the codeword mapping mode.

Optionally, each DMRS port in the DMRS port group has a QCL relationship.

An embodiment of the present invention also provides an electronic device, including: at least one processor; and a memory that is communicatively connected with the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and The instructions are executed by the at least one processor, so that the at least one processor can execute the method described in any of the foregoing embodiments.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium that stores computer instructions for causing the computer to execute any of the methods described in the foregoing embodiments.

An embodiment of the present invention also provides an apparatus for determining a codeword mapping mode, including: a receiving unit for receiving a recommendation message reported by a terminal, the recommendation message including the recommended number of DMRS port groups and/or the recommended codeword mapping mode The recommended number of DMRS port groups and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through at least one transmission point; the codeword mapping method determining unit is used to determine the The recommended number of DMRS port groups and/or the recommended codeword mapping mode determine the codeword mapping mode of the downlink transmission data.

In the embodiment of the present invention, the codeword mapping mode of the downlink transmission data is determined according to the recommended number of DMRS port groups reported by the terminal and/or the recommended codeword mapping mode, that is, the transmission of each transmission point is determined according to the recommended message reported by the terminal Quality, different codeword mapping methods are determined according to different transmission qualities, which can reduce the performance loss of downlink data transmission compared with the prior art.

Optionally, the codeword mapping mode determining unit is specifically configured to: determine the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and the number of implementation configurations, where: The implementation configuration parameters are determined according to the implementation mode of the network side device.

Optionally, the codeword mapping mode determining unit is specifically configured to: determine the codeword mapping mode of the downlink transmission data and the configuration parameter according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and the implementation configuration parameter. The number of DMRS port groups occupied by downlink transmission data.

An embodiment of the present invention also provides an electronic device, including: at least one processor; and a memory that is communicatively connected with the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and The instructions are executed by the at least one processor, so that the at least one processor can execute the method described in any of the foregoing embodiments.

An embodiment of the present invention also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to make the computer execute the method described in any of the above-mentioned embodiments.

An embodiment of the present invention also provides a method for determining a codeword mapping mode, which includes: a downlink signal receiving unit for receiving a downlink signal sent by a network side device through at least one transmission point; a measurement data determining unit for determining based on the downlink signal Measurement data; a reporting unit for reporting the measurement data to the network side device so that the network side device can determine the codeword mapping mode corresponding to the downlink transmission data based on the measurement data.

In the embodiment of the present invention, the measurement data is determined based on the downlink signal, and the measurement data is reported to the network side device. The network side device determines the codeword mapping method based on the measurement data, and can perform the codeword mapping method determined by the network side device Data demodulation, compared with the prior art, can take into account the transmission quality of different transmission points, thereby reducing the performance loss of downlink data transmission.

Optionally, the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, the measurement data is the number of transmission layers supported by each transmission point, and the reporting unit is specifically configured to: add the number of transmission layers supported by each transmission point to the channel status information CSI, and report the CSI to The network side equipment.

Optionally, the measurement data determining unit is further configured to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

An embodiment of the present invention also provides an electronic device, including: at least one processor; and a memory that is communicatively connected with the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and The instructions are executed by the at least one processor, so that the at least one processor can execute the method described in any of the foregoing embodiments.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium that stores computer instructions for causing the computer to execute any of the methods described in the foregoing embodiments.

101‧‧‧Network side equipment

102‧‧‧Terminal

1001‧‧‧DMRS port group quantity determination unit

1002‧‧‧Code word mapping mode determination unit

1101‧‧‧Receiving unit

1102‧‧‧Code word mapping mode determination unit

1201‧‧‧Downstream signal receiving unit

1202‧‧‧Measurement data determination unit

1203‧‧‧Report unit

1301‧‧‧Processor

1302‧‧‧Memory

1303‧‧‧Transceiver

1304‧‧‧Bus interface

1401‧‧‧Processor

1402‧‧‧Memory

1403‧‧‧Transceiver

1404‧‧‧Bus interface

1501‧‧‧Processor

1502‧‧‧Memory

1503‧‧‧Transceiver

1504‧‧‧Bus interface

201-202‧‧‧Step

501-504‧‧‧Step

601-604‧‧‧Step

701-710‧‧‧Step

801-802‧‧‧Step

901-903‧‧‧Step

1 is a schematic structural diagram of a communication architecture provided by an embodiment of the present invention; FIG. 2 is a schematic flowchart of a method for determining a codeword mapping method provided by an embodiment of the present invention; FIG. 3 is a schematic diagram of a mapping method I provided by an embodiment of the present invention; 4 is a schematic diagram of mapping method II provided by an embodiment of the present invention; FIG. 5 is a schematic flowchart of a method for determining a codeword mapping method provided by an embodiment of the present invention; FIG. 6 is a method for determining a codeword mapping provided by an embodiment of the present invention Fig. 7 is a schematic flowchart of a method for determining a codeword mapping method according to an embodiment of the present invention; Fig. 8 is a schematic flowchart of a method for determining a codeword mapping method according to an embodiment of the present invention; A schematic flowchart of a method for determining a codeword mapping method provided by the embodiment; FIG. 10 is a schematic structural diagram of an apparatus for determining a codeword mapping method provided by an embodiment of the present invention; FIG. 11 is a method for determining a codeword mapping method provided by an embodiment of the present invention Figure 12 is a schematic structural diagram of an apparatus for determining a codeword mapping method provided by an embodiment of the present invention; Figure 13 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention; Figure 14 is a schematic diagram provided by an embodiment of the present invention A schematic structural diagram of an electronic device; FIG. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

In order to facilitate the reviewers to understand the technical features, content and advantages of the present invention and its achievable effects, the present invention is described in detail in the form of embodiments with accompanying drawings and accessories as follows, and the diagrams used therein , The subject matter is only for the purpose of illustration and auxiliary manual, and may not be the true proportions and precise configuration after the implementation of the present invention. Therefore, it should not be interpreted in terms of the proportions and configuration relationships of the attached drawings, and applications that limit the practical implementation of the present invention The scope is stated first.

In the description of the present invention, it should be understood that the terms "center", "horizontal", "upper", "lower", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship of indications such as "outside" is based on the orientation or positional relationship shown in the diagram, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation to The specific azimuth structure and operation cannot be understood as a limitation of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a network structure applied in an embodiment of the present invention; as shown in FIG. 1, it includes a network side device 101 and a terminal 102. The network side device 101 may be an evolved base station (eNB, evolved Node B) or other base station. It should be noted that the specific type of the network side device 101 is not limited in the embodiment of the present invention. The network side device 101 can establish communication with the terminal 102. The terminal 102 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (PDA), a mobile Internet device (Mobile For terminal devices such as Internet Device (MID) or Wearable Device (Wearable Device), it should be noted that the specific type of terminal 102 is not limited in the embodiment of the present invention.

Based on the structure in FIG. 1, an embodiment of the present invention provides a method for determining a codeword mapping method. As shown in FIG. 2, the method includes: Step 201: The network side device determines the demodulation reference signal port occupied by the downlink transmission data sent to the terminal The number of DMRS port groups N, N is greater than or equal to 1. In step 202, if the network-side device determines that the codeword transmission mode corresponding to the downlink transmission data is dual-codeword transmission, the network-side device occupies according to the downlink transmission data The number N of DMRS port groups determines the codeword mapping mode corresponding to the downlink transmission data.

In the embodiment of the present invention, the network side device performs data transmission with the terminal through at least one transmission point. Optionally, in the embodiment of the present invention, each transmission point may be a cooperative TRP (Transmission/Receiption Point) or may be Each cooperative antenna array (panel).

In the embodiment of the present invention, when multiple TRPs/panels perform cooperative transmission, the signals sent by different TRPs/panels may have relatively independent large-scale features, such as average delay, delay spread, and average Doppler shift , Doppler expansion and airspace reception parameters. Therefore, in the NR system, the condition that the large-scale parameters of two or more reference signal channels are the same is called quasi co-located QCL. Otherwise, it is called non-QCL.

Optionally, in the embodiment of the present invention, each DMRS port in the DMRS port group has a QCL relationship, that is, each DMRS port in a group is QCL.

Optionally, in the embodiment of the present invention, the DMRS ports in the same CDM group also have a QCL relationship.

Optionally, in the embodiment of the present invention, each data channel supports at most two DMRS port groups.

Optionally, in the embodiment of the present invention, a DMRS port group may be transmitted through one transmission point or through two transmission points, and the DMRS ports corresponding to the two transmission points also have a QCL relationship.

In the embodiment of the present invention, since there is no problem that the channel quality of the layer numbers corresponding to the two codewords differ greatly during single codeword transmission, the method in the prior art can be used to determine the codeword mapping mode. Therefore, in the embodiment of the present invention, it is first determined that the codeword transmission mode corresponding to the downlink transmission data is double codeword transmission.

Optionally, in the embodiment of the present invention, the number of DMRS port groups occupied by the downlink transmission data may be used to determine the codeword transmission mode corresponding to the downlink transmission data.

For example, method 1: If the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, it determines that the codeword transmission mode corresponding to the downlink transmission data is double codeword transmission.

Method 2: If the network-side device determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, it determines whether the number of transmission layers supported by each transmission point meets a preset rule, which is the network-side device Determined according to the number of transmission layers of the PDSCH; if the network side device determines that the number of transmission layers supported by each transmission point meets the preset rule, it determines that the codeword transmission mode corresponding to the downlink transmission data is double codeword transmission.

Manner 3: If the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is equal to 1, it determines the code word transmission mode corresponding to the downlink transmission data according to the number of transmission layers of the PDSCH.

Of course, there are many ways to determine the code word transmission mode, which will not be repeated here.

In the embodiment of the present invention, the network side device determines the codeword mapping method according to the number of DMRS port groups occupied by the downlink transmission data. Optionally, in the embodiment of the present invention, there are two codeword mapping methods, one is the existing The mapping method that is usually used in the technology as equal as possible and the mapping method determined according to the quality of different channels.

For example, in the peer-to-peer mapping method shown in Figure 3, the number of layers of each codeword in this mapping method is as equal as possible. When the number of layers is even, the number of layers of each codeword is the same. When the number of layers is odd, the number of layers of codeword 0 is one less than that of codeword 1.

Figure 4 shows the mapping method determined according to different channel qualities, that is, the number of layers corresponding to codeword 0 in Figure 4 is 3, and the number of layers corresponding to codeword 1 is 2.

Optionally, in this embodiment of the present invention, the nearly equivalent mapping mode is denoted as mapping mode I below. The mapping method determined according to the channel quality is marked as mapping method II.

In the embodiment of the present invention, during the downlink transmission process, the network side device allocates a certain number of parallel data flows to each scheduled terminal, and each data flow is called a layer. After the codeword mapping mode is determined, each codeword that needs to be transmitted is mapped to at least one data layer, and the transmission is performed through at least one data layer.

Optionally, in this embodiment of the present invention, one downlink data transmission channel supports up to 8 layers of data transmission.

Optionally, in the embodiment of the present invention, before determining the codeword mapping mode corresponding to the downlink transmission data, it is also necessary to determine the number of transmission layers that the downlink data transmission channel can support; optionally, in the embodiment of the present invention, the downlink The data transmission channel is the downlink shared channel PDSCH.

In the embodiment of the present invention, both the network side device and the terminal device can determine the number of transmission layers supported by the PDSCH. Optionally, the network side device and the terminal device determine the number of transmission layers supported by the PDSCH according to the channel quality of the PDSCH.

If the number of transmission layers supported by the PDSCH determined by the network side device or the terminal device is 1, that is, the codeword can only be transmitted through one transmission layer, then the equivalent codeword mapping method specified in the existing technical specifications is used for codeword mapping.

If the number of transmission layers supported by the PDSCH determined by the network side device or the terminal device is greater than 1, the network side device then determines the number of DMRS port groups, and determines the codeword mapping method based on the number.

Optionally, in the embodiment of the present invention, when it is determined that the number of transmission layers supported by the PDSCH is greater than 1, the mapping method I can be described as: if the number of transmission layers of the PDSCH is an even number, the number of transmission layers corresponding to each codeword is equal ; If the number of transmission layers of PDSCH is even and odd, the number of transmission layers of codeword 0 is one less than that of codeword 1.

The mapping method II can be described as: N0+N1=the number of transmission layers of PDSCH, where N0 is greater than or equal to 1, N1 is greater than or equal to 1, N0 is the number of transmission layers of codeword 0, and N1 is the transmission layer of codeword 1. number.

Optionally, in this embodiment of the present invention, the network side device may determine the number of DMRS port groups occupied by the downlink transmission data according to at least one of the following information: the number of DMRS port groups recommended by the terminal; the codeword mapping recommended by the terminal Mode; the number of transmission layers supported by each transmission point.

Optionally, in the embodiment of the present invention, the number of DMRS port groups recommended by the terminal is determined by the terminal after measuring the downlink signal sent by the network side device through the at least one transmission point; the codeword mapping mode recommended by the terminal is determined by the terminal according to The network-side equipment is determined by measuring the downlink signal sent by the at least one transmission point; the number of transmission layers supported by each transmission point may be determined by the terminal or the network-side equipment.

Optionally, in the embodiment of the present invention, the terminal may determine the number of transmission layers supported by each transmission point based on the measurement data measured by the downlink signal sent by the at least one transmission point through the network side device, and add the number of transmission layers Newspaper.

Optionally, in the embodiment of the present invention, the terminal adds the number of transmission layers supported by each transmission point determined by measurement to the channel state information CSI, and reports the CSI to the network side.

After receiving the CSI of the terminal, the network side determines the number of transmission layers supported by each transmission point.

Optionally, in the embodiment of the present invention, the network side device receives the uplink signal sent by the terminal through at least one transmission point, and determines the number of transmission layers supported by each transmission point based on the measurement data of the uplink signal.

Optionally, in this embodiment of the present invention, the number of transmission layers supported by each transmission point determined by the network side device may be different from the number of transmission layers supported by each transmission point determined by the terminal.

Optionally, in the embodiment of the present invention, the network side device determines the number of DMRS port groups occupied by downlink transmission data according to at least one piece of information:

A. The network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the number of DMRS port groups recommended by the terminal.

B. The network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the number of codeword mapping methods recommended by the terminal.

C. The network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the determined number of transmission layers supported by each transmission point.

D. The network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the combination of any two of the above three pieces of information.

E. The network side equipment determines the number of DMRS port groups occupied by the downlink transmission data according to the combination of the above three information.

Optionally, in this embodiment of the present invention, in addition to determining the number of DMRS port groups occupied by downlink transmission data based on at least one of the above three types of information, the network side device also needs to determine the DMRS port group occupied by downlink transmission data based on other information. The number of groups.

Optionally, in the embodiment of the present invention, the other information may be reference information corresponding to the implementation on the network side. For example, if the implementation on the network side is the reliability method, the other information is the reference information corresponding to the reliability method.

In the embodiment of the present invention, after the network side device determines the above information, the network side device can determine the number of DMRS port groups occupied by the downlink transmission data according to at least one of the above information.

Optionally, if the network side determines from the above information that the number of transmission layers supported by each transmission point is greater than or equal to 1, then it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2. If the network side device determines that there is only one If the number of transmission layers supported by the transmission point is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is 1.

Optionally, in the embodiment of the present invention, each PDSCH data channel supports the transmission of at least two DMRS port groups.

Optionally, in the embodiment of the present invention, after the network side determines that the number of DMRS port groups is 1, the mapping is performed according to the peer-to-peer codeword mapping mode specified in the prior art. In other words, when the number of DMRS port groups is determined to be 1, the dual codewords are transmitted through one DMRS port group, and there will be no channel quality imbalance corresponding to different DMRS port groups, so the existing technology is used to determine the code The word mapping mode is mapping mode I.

Optionally, in the embodiment of the present invention, when the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, it is determined that two codewords can be transmitted through at least two DMRS port groups. There may be uneven channel quality corresponding to different DMRS port groups. In the following, the number of DMRS port groups is 2 as an example. There are two methods for determining the codeword mapping mode. They are: the first type, the network side device directly determines the mapping method as the mapping method II; the second type, the network side device determines whether the number of transmission layers corresponding to the two DMRS port groups meets the preset rules, and the preset rule is the network The roadside device is determined according to the number of transmission layers of the PDSCH; if it is determined that the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, the codeword mapping mode corresponding to the downlink transmission data is determined to be mapping mode II; otherwise, the downlink transmission data is determined The codeword mapping mode corresponding to the transmission data is the mapping mode I.

Optionally, in the embodiment of the present invention, the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, where the value range of the elements in the preset set is [1,... ,RI_MAX], the RI_MAX is the maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2.

For example, in the embodiment of the present invention, for the preset rule, first determine the sum of the number of transmission layers corresponding to two DMRS port groups, and the preset set. The preset set is determined according to the number of transmission layers of the PDSCH. For clarity To understand the first preset rule, here is an example. For example, as shown in Figure 5, step 501, the network side device according to the sum of the number of transmission layers corresponding to two DMRS port groups and the number of transmission layers of PDSCH; step 502, the The network device determines whether the sum of the number of transmission layers corresponding to the two DMRS port groups belongs to set X. If it belongs to X, execute step 503; otherwise, execute step 504; step 503, the network side device determines that the codeword mapping mode is mapping mode II Step 504, the network side device determines that the codeword mapping mode is mapping mode I.

In the above example, the set X is predefined, and the elements in the set X are positive integers taken from 1 to RI_max, where RI_max is the maximum number of transmission layers of PDSCH.

Optionally, in the embodiment of the present invention, for the preset rule, the relationship between the difference in the number of transmission layers supported by each transmission point and 2 is determined. In order to understand the preset rule more clearly, an example is described here, as shown in FIG. In step 601, the network side device determines the layer number difference according to the number of transmission layers corresponding to the two DMRS port groups, and the network side device determines the PDSCH transmission layer number; step 602, the network device determines whether the layer number difference is greater than or equal to 2 If it belongs to Y, go to step 603, otherwise go to step 604; step 603, the network side device determines that the codeword mapping mode is mapping mode II; step 604, the network side device determines that the codeword mapping mode is mapping mode I.

Optionally, in the embodiment of the present invention, when it is determined that the number of DMRS port groups is greater than or equal to 3, the codeword mapping manner may also be determined in the foregoing manner, and details are not described herein.

Optionally, in the embodiment of the present invention, after the network-side device determines the codeword mapping mode, the network-side device transmits the codeword mapping mode to the terminal through signaling or banking, and the terminal receives the codeword After the mapping method, determine the method of demodulating the data in order to receive the downlink data.

In order to better explain the embodiments of the present invention, the following describes a transmission method provided by the embodiments of the present invention through specific implementation scenarios.

In the embodiment of the present invention, the network side device determines the number of transmission layers supported by each transmission point through the uplink signal sent by the terminal, and if the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is equal to 2, the preset rule is used To determine the codeword mapping method, in the preset rule, the maximum in X set is 8. The specific steps are shown in Figure 7: Step 701, the network side device determines the number of transmission layers of the PDSCH according to the state of the PDSCH; Step 702, the network side device Determine whether the number of transmission layers of the PDSCH is greater than 1, if it is greater than 1, go to step 704, otherwise go to step 703; step 703, the network side device determines that the codeword mapping mode is mapping mode I, go to step 705; step 704, network side device Determine the number of transmission layers supported by each transmission point according to the uplink signal sent by the terminal, and go to step 706; step 705, the network side device transmits the codeword mapping method to the terminal; step 706, the network side device determines whether each transmission point supports The number of transmission layers is greater than or equal to 1, if yes, go to step 708, otherwise go to step 707; step 707, the network side device determines that the number of DMRS port groups used is equal to 1, go to step 703; step 708, the network side device determines to use The number of DMRS port groups is equal to 2; step 709, the network side device determines whether the sum of the number of transmission layers corresponding to the two DMRS port groups belongs to the set of [1,...8], if yes, go to step 711, otherwise go to step 703 Step 710, the network side determines that the codeword mapping mode is mapping mode II, and step 705 is executed.

Based on the structure of FIG. 1, the embodiment of the present invention also provides a transmission method, as shown in FIG. 8, including: step 801, the network side device receives a recommendation message reported by the terminal, and the recommendation message includes the number of recommended DMRS port groups and /Or a recommended codeword mapping method; the recommended number of DMRS port groups and/or the recommended codeword mapping method are determined by the terminal after measuring according to the downlink signal sent by the network side device through at least one transmission point; step 802. The network side device determines the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups and/or the recommended codeword mapping mode.

Optionally, in the embodiment of the present invention, the network side device may determine the codeword mapping mode according to the following three methods.

Method 1: The network side equipment determines the code word mapping method according to the number of DMRS port groups recommended by the terminal.

Method 2: The network side device determines the codeword mapping method according to the codeword mapping method recommended by the terminal.

Manner 3: The network side device determines the codeword mapping mode according to the codeword mapping mode recommended by the terminal and the number of DMRS port groups recommended by the terminal.

Optionally, in the embodiment of the present invention, for the first method, the network side device further determines the single code word mapping or the double code word mapping according to the number of DMRS port groups recommended by the terminal. For example, if the network side device determines the DMRS port recommended by the terminal If the number of groups is equal to 1, the codeword mapping method is determined to be single codeword mapping; when the network side device determines that the number of DMRS port groups recommended by the terminal is equal to 2, the first method of determination is that the network side device directly determines the use of dual codeword mapping Method; The second method of determination is for the network-side equipment to determine whether the number of transmission layers supported by each transmission point meets a preset rule, which is determined by the network-side equipment according to the PDSCH status; if the network-side equipment determines that each transmission point supports If the number of transmission layers meets the preset rule, it is determined that the codeword mapping mode corresponding to the downlink transmission data is dual codeword mapping; otherwise, the codeword mapping mode corresponding to the downlink transmission data is determined to be dual codeword mapping.

Similarly, in the second and third methods, if the network side device determines the number of DMRS port groups according to the codeword mapping method recommended by the terminal or the network side device determines the DMRS port group according to the codeword mapping method recommended by the terminal and the number of DMRS port groups recommended by the terminal When the number of groups is determined and the codeword mapping mode is determined according to the number of DMRS port groups, the above judgment method can be used.

That is to say, in the embodiment of the present invention, the network side device can not only determine the codeword mapping mode according to the recommendation message, but also determine the number of DMRS port groups. For example, the network side equipment determines through the recommendation message to use one codeword/two DMRS port groups for downlink data transmission, or two codewords/two DMRS port groups for downlink data transmission, or two codewords/one DMRS The port group performs downlink data transmission, or one codeword/one DMRS port group performs downlink data transmission.

In the embodiment of the present invention, the network-side device directly determines the codeword mapping mode according to at least one of the recommended messages reported by the receiving terminal. Optionally, in step 802, the network-side device determines the number of recommended DMRS port groups, The recommended codeword mapping mode and implementation configuration parameters determine the codeword mapping mode of the downlink transmission data, wherein the implementation configuration parameters are determined according to the implementation mode of the network side device.

Optionally, in the embodiment of the present invention, the implementation configuration parameter is the reference information corresponding to the implementation on the network side. For example, if the implementation on the network side is reliable transmission, the implementation configuration parameter is the reference information corresponding to the reliable transmission.

Based on the structure in Figure 1, an embodiment of the present invention provides a transmission method, as shown in Figure 9, including: Step 901, a terminal receives a downlink signal sent by a network side device through at least one transmission point; Step 902, the terminal according to the downlink The signal determines the measurement data; step 903, the terminal reports the measurement data to the network-side device, so that the network-side device determines the codeword mapping mode corresponding to the downlink transmission data based on the measurement data.

Optionally, in the embodiment of the present invention, optionally, in the embodiment of the present invention, if the terminal determines that the number of transmission layers supported by the PDSCH is 1, that is, the quality of the PDSCH channel is poor, and due to single codeword mapping, corresponding If the feedback and control overhead and complexity are low, the single codeword mapping method can be determined.

Optionally, in step 901, the terminal receives the downlink signal sent by the network side device through the downlink data transmission channel.

Optionally, in step 902, the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, in step 903, after the terminal determines the measurement data, it adds the measurement data to the channel state information CSI, and reports it through the CSI.

Based on the same concept, an embodiment of the present invention also provides a transmission device, as shown in FIG. 10, including: a DMRS port group quantity determining unit 1001, configured to determine the demodulation reference signal port group DMRS occupied by the downlink transmission data sent to the terminal The number of port groups N, N is greater than or equal to 1. The codeword mapping mode determining unit 1002 is used to determine that the codeword transmission mode corresponding to the downlink transmission data is dual codeword transmission, and the network side device occupies according to the downlink transmission data The number N of DMRS port groups determines the codeword mapping mode corresponding to the downlink transmission data.

Optionally, the DMRS port group quantity determining unit 1001 is specifically configured to determine the quantity of DMRS port groups occupied by the downlink transmission data according to at least one of the following information; the information includes: DMRS port groups recommended by the terminal The number, the codeword mapping method recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, the DMRS port group quantity determining unit 1001 is further configured to: receive an uplink signal sent by the terminal to the at least one transmission point; measure the uplink signal to determine the number of transmission layers supported by each transmission point.

Optionally, the DMRS port group quantity determining unit 1001 is further configured to: receive channel status information CSI reported by the terminal, the CSI includes the number of transmission layers supported by each transmission point; the number of transmission layers supported by each transmission point It is obtained by the terminal measuring the downlink signal sent by the network side device to the at least one transmission point.

Optionally, the DMRS port group quantity determining unit 1001 is further configured to: receive a recommendation message reported by the terminal, the recommendation message including the recommended number of DMRS port groups, and/or the recommended codeword mapping mode; The number of recommended DMRS port groups, and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through the at least one transmission point.

Optionally, the DMRS port group quantity determining unit 1001 is specifically configured to: if it is determined that the number of transmission layers supported by each transmission point is greater than or equal to 1, determining that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2. If it is determined that the number of transmission layers supported by only one transmission point is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is 1.

Optionally, the DMRS port group quantity determining unit 1001 is further configured to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

Optionally, the codeword mapping mode corresponding to the downlink transmission data includes: mapping mode I and mapping mode II; in the mapping mode I, if the number of transmission layers of the PDSCH is an even number, the transmission layer corresponding to each codeword If the number of transmission layers of the PDSCH is an even number but an odd number, the number of transmission layers of codeword 0 is one less than the number of transmission layers of codeword 1. In this mapping method II, N0+N1=the number of transmission layers of PDSCH, Among them, N0 is greater than or equal to 1, N1 is greater than or equal to 1, N0 is the number of transmission layers of codeword 0, and N1 is the number of transmission layers of codeword 1.

Optionally, the codeword mapping mode determining unit 1002 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, determine that the codeword transmission mode corresponding to the downlink transmission data is a mapping mode II.

Optionally, the codeword mapping mode determining unit 1002 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, then determine whether the number of transmission layers corresponding to the two DMRS port groups meets the predetermined requirements. Set a rule, the preset rule is determined by the network side device according to the number of transmission layers of the PDSCH; if it is determined that the number of transmission layers corresponding to two DMRS port groups meets the preset rule, the codeword corresponding to the downlink transmission data is determined The mapping method is mapping method II.

Optionally, the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, where the value range of the elements in the preset set is [1,...,RI_MAX], and the RI_MAX is The maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2.

Optionally, the codeword mapping mode determining unit 1002 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is equal to 1, then determine the codeword corresponding to the downlink transmission data according to the number of transmission layers of the PDSCH The mapping method is mapping method I.

Optionally, the codeword mapping mode determining unit 1002 is specifically configured to: transmit the codeword mapping mode to the terminal through signaling or implicitly, so that the terminal can demodulate data according to the codeword mapping mode.

Optionally, each DMRS port in the DMRS port group has a QCL relationship.

Based on the same concept, an embodiment of the present invention also provides a transmission device, as shown in FIG. 11, including: a receiving unit 1101, configured to receive a recommendation message reported by a terminal, and the recommendation message includes the number of recommended DMRS port groups and/ Or the recommended codeword mapping method; the recommended number of DMRS port groups and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through at least one transmission point; codeword mapping The mode determining unit 1102 is configured to determine the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups and/or the recommended codeword mapping mode.

Optionally, the codeword mapping mode determining unit 1102 is specifically configured to determine the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and implementation configuration parameters, where , The implementation configuration parameters are determined according to the implementation mode of the network side device.

Optionally, the codeword mapping mode determining unit 1102 is specifically configured to: determine the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and the implementation configuration parameters, and The number of DMRS port groups occupied by the downlink transmission data.

Based on the same concept, an embodiment of the present invention also provides a transmission device, as shown in FIG. 12, including: a downlink signal receiving unit 1201, configured to receive a downlink signal sent by a network side device through at least one transmission point; a measurement data determining unit 1202 , Used to determine the measurement data according to the downlink signal; the reporting unit 1203, used to report the measurement data to the network side device, so that the network side device determines the code word mapping method corresponding to the downlink transmission data according to the measurement data .

Optionally, the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, the measurement data is the number of transmission layers supported by each transmission point, and the reporting unit 1203 is specifically configured to: add the number of transmission layers supported by each transmission point to the channel status information CSI, and report the CSI To the network side equipment.

Optionally, the measurement data determining unit 1202 is further configured to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

Based on the same principle, the present invention also provides an electronic device, as shown in FIG. 13, comprising: a processor 1301, a memory 1302, a transceiver 1303, and a bus interface 1304, wherein the processor 1301, the memory 1302, and the transceiver 1303 are connected via a bus interface 1304; the processor 1301 is used to read the program in the memory 1302 and execute the following method: determine the demodulation reference signal port group occupied by the downlink transmission data sent to the terminal DMRS port group If it is determined that the codeword transmission mode corresponding to the downlink transmission data is dual-codeword transmission, the number N of the DMRS port group occupied by the downlink transmission data is used to determine the code corresponding to the downlink transmission data Word mapping method.

Optionally, the processor 1301 determines the number of DMRS port groups occupied by the downlink transmission data according to at least one of the following information; the information includes: the number of DMRS port groups recommended by the terminal, and the codeword mapping recommended by the terminal Mode, the number of transmission layers supported by each transmission point.

Optionally, the processor 1301 is further configured to: receive the uplink signal sent by the terminal to the at least one transmission point through the transceiver 1303; measure the uplink signal to determine the number of transmission layers supported by each transmission point.

Optionally, the processor 1301 is further configured to: receive channel state information CSI reported by the terminal through the transceiver 1303, the CSI includes the number of transmission layers supported by each transmission point; the number of transmission layers supported by each transmission point It is obtained by the terminal measuring the downlink signal sent by the network side device to the at least one transmission point.

Optionally, the processor 1301 is further configured to: receive a recommendation message reported by the terminal through the transceiver 1303, where the recommendation message includes the number of recommended DMRS port groups and/or the recommended codeword mapping mode; The number of recommended DMRS port groups, and/or the recommended codeword mapping method is determined by the terminal after measuring the downlink signal sent by the network side device through the at least one transmission point.

Optionally, the processor 1301 is specifically configured to: if it is determined that the number of transmission layers supported by each transmission point is greater than or equal to 1, determine that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2; If the number of transmission layers supported by a transmission point is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is 1.

Optionally, the processor 1301 is further configured to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

Optionally, the codeword mapping mode corresponding to the downlink transmission data includes: mapping mode I and mapping mode II; in the mapping mode I, if the number of transmission layers of the PDSCH is an even number, the transmission layer corresponding to each codeword If the number of transmission layers of the PDSCH is an even number but an odd number, the number of transmission layers of codeword 0 is one less than the number of transmission layers of codeword 1. In this mapping method II, N0+N1=the number of transmission layers of PDSCH, Among them, N0 is greater than or equal to 1, N1 is greater than or equal to 1, N0 is the number of transmission layers of codeword 0, and N1 is the number of transmission layers of codeword 1.

Optionally, the processor 1301 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, determine that the codeword transmission mode corresponding to the downlink transmission data is mapping mode II.

Optionally, the processor 1301 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, whether the number of transmission layers corresponding to the two DMRS port groups meets a preset rule, the preset The rule is determined by the network side device according to the number of transmission layers of the PDSCH; if the network side device determines that the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, it determines the codeword mapping method corresponding to the downlink transmission data It is the mapping method II.

Optionally, the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, where the value range of the elements in the preset set is [1,...,RI_MAX], and the RI_MAX is The maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2.

Optionally, the processor 1301 is specifically configured to: if it is determined that the number of DMRS port groups occupied by the downlink transmission data is equal to 1, determine that the codeword mapping mode corresponding to the downlink transmission data is a mapping mode according to the number of transmission layers of the PDSCH I.

Optionally, the processor 1301 is further configured to transmit the codeword mapping manner to the terminal through the transceiver 1303 in a signaling manner or an implicit manner, so that the terminal demodulates data according to the codeword mapping manner.

An embodiment of the present invention provides a computer program product. The computer program product includes a calculation program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer Perform any of the above methods to determine the codeword mapping mode.

Based on the same principle, the present invention also provides an electronic device, as shown in FIG. 14, including: a processor 1401, a memory 1402, a transceiver 1403, a bus interface 1404, wherein the processor 1401, the memory 1402, and the transceiver 1402 The 1403 are connected through the bus interface 1404; the processor 1401 is used to read the program in the memory 1402 and execute the following method: receive the recommended message reported by the terminal through the transceiver 1403, and the recommended message includes the recommendation The number of DMRS port groups and/or the recommended codeword mapping method; the recommended number of DMRS port groups and/or the recommended codeword mapping method is performed by the terminal according to the downlink signal sent by the network side device through at least one transmission point Determined after measurement; according to the recommended number of DMRS port groups and/or the recommended codeword mapping mode, the codeword mapping mode of the downlink transmission data is determined.

Optionally, the processor 1401 is specifically configured to: determine the codeword mapping mode of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and implementation configuration parameters, where the implementation configuration parameter It is determined based on the implementation of the network side equipment.

Optionally, the processor 1401 is specifically configured to determine the codeword mapping mode of the downlink transmission data and the occupancy of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode, and the implementation configuration parameter. The number of DMRS port groups.

An embodiment of the present invention provides a computer program product. The computer program product includes a calculation program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer Perform any of the above methods to determine the codeword mapping mode.

Based on the same principle, the present invention also provides an electronic device, as shown in FIG. 15, including: a processor 1501, a memory 1502, a transceiver 1503, a bus interface 1504, wherein the processor 1501, the memory 1502 and the transceiver 1502 1503 are connected through a bus interface 1504; the processor 1501 is used to read the program in the memory 1502 and execute the following method: receive the downlink signal sent by the network side device through at least one transmission point through the transceiver 1503; Determine measurement data according to the downlink signal; report the measurement data to the network side device, so that the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the measurement data.

Optionally, the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, the codeword mapping mode recommended by the terminal, and the number of transmission layers supported by each transmission point.

Optionally, the measurement data is the number of transmission layers supported by each transmission point, and the processor 1501 is specifically configured to: add the number of transmission layers supported by each transmission point to the channel status information CSI, and report the CSI to The network side equipment.

Optionally, the processor 1501 is further configured to determine that the number of transmission layers of the downlink shared channel PDSCH is greater than one.

An embodiment of the present invention provides a computer program product. The computer program product includes a calculation program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer Perform any of the above methods to determine the way of codeword mapping.

The present invention is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, dedicated computers, embedded processors, or other programmable data processing equipment to generate a machine that can be executed by the processor of the computer or other programmable data processing equipment A device for realizing the functions specified in one flow or multiple flows in the flowchart and/or one block or multiple blocks in the block diagram is generated.

These computer program instructions can also be stored in a computer readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including the instruction device , The instruction device realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to generate computer-implemented processing, so that the computer or other programmable equipment The instructions executed above provide steps for implementing functions specified in one or more processes in the flowchart and/or one or more blocks in the block diagram.

The above detailed description is a specific description of a possible embodiment of the present invention, but this embodiment is not intended to limit the scope of the present invention. Any equivalent implementation or modification that does not deviate from the technical spirit of the present invention should be included in In the scope of the patent in this case.

201-202‧‧‧Step

Claims (22)

A method for determining a codeword mapping method, the method includes: the network side device determines the number N of demodulation reference signal port groups DMRS port groups occupied by the downlink transmission data sent to the terminal, and N is greater than or equal to 1; if the network side device It is determined that the codeword transmission mode corresponding to the downlink transmission data is dual codeword transmission, and the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data; the network side The device determining the number of DMRS port groups occupied by the downlink transmission data sent to the terminal includes: the network side device determines the number of DMRS port groups occupied by the downlink transmission data according to at least one of the following information; the information includes: the The number of DMRS port groups recommended by the terminal, the codeword mapping method recommended by the terminal, and the number of transmission layers supported by each transmission point; the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, including: the network If the roadside device determines that the number of transmission layers supported by each transmission point is greater than or equal to 1, it determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2. If the network side device determines that only one transmission point supports If the number of transmission layers is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is 1. The method for determining the codeword mapping mode as described in item 1 of the scope of patent application, wherein, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: The network side device receives the uplink signal sent by the terminal to the at least one transmission point; the network side device measures the uplink signal to determine the number of transmission layers supported by each transmission point. For the method for determining the codeword mapping mode described in item 1 of the scope of patent application, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: the network side device receives the The channel status information CSI reported by the terminal, the CSI includes the number of transmission layers supported by each transmission point; the number of transmission layers supported by each transmission point is the number of transmission layers supported by the terminal on the downlink signal sent by the network side device to the at least one transmission point Measured. For the method for determining the codeword mapping mode described in item 1 of the scope of patent application, before the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, it further includes: the network side device receives the The recommended message reported by the terminal, the recommended message includes the recommended number of DMRS port groups, and/or the recommended codeword mapping mode; the recommended number of DMRS port groups, and/or, the recommended codeword mapping mode is The terminal measures the downlink signal sent by the network side device to the at least one transmission point and determines it. For the method for determining the codeword mapping mode described in any one of items 2 to 4 of the scope of the patent application, the network side device determines the demodulation reference signal port group DMRS port group occupied by the downlink transmission data sent to the terminal Before the number N, it also includes: the network side device determines that the number of transmission layers of the PDSCH is greater than one. The method for determining the codeword mapping mode described in item 5 of the scope of patent application, wherein the codeword mapping mode corresponding to the downlink transmission data includes: Mapping method I and mapping method II; in the mapping method I, if the number of transmission layers of the PDSCH is an even number, the number of transmission layers corresponding to each codeword is equal; if the number of transmission layers of the PDSCH is an even number and an odd number, the code The number of transmission layers of word 0 is one less than the number of transmission layers of code word 1. In this mapping method II, N0+N1=the number of transmission layers of PDSCH, where N0 is greater than or equal to 1, N1 is greater than or equal to 1, and N0 is the code The number of transmission layers of word 0, and N1 is the number of transmission layers of code word 1. According to the method for determining the codeword mapping mode described in item 6 of the scope of patent application, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data, including : If the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, it determines that the codeword mapping mode corresponding to the downlink transmission data is mapping mode II. According to the method for determining the codeword mapping mode described in item 6 of the scope of patent application, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number of DMRS port groups occupied by the downlink transmission data, including: If the network-side device determines that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2, it determines whether the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, which is based on the network-side device The number of transmission layers of the PDSCH is determined; if the network side device determines that the number of transmission layers corresponding to the two DMRS port groups meets the preset rule, it determines that the codeword mapping mode corresponding to the downlink transmission data is mapping mode II. The method for determining the codeword mapping mode described in item 8 of the scope of patent application, wherein the preset rule is that the sum of the transport layers corresponding to each DMRS port group satisfies a preset set, wherein the elements in the preset set are The value range is [1,...,RI_MAX], the RI_MAX is the The maximum number of transmission layers of the PDSCH; or the preset rule is that the difference between the number of transmission layers corresponding to two DMRS port groups is greater than or equal to 2. According to the method for determining the codeword mapping mode described in item 6 of the scope of patent application, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data, including : If the network side device determines that the number of DMRS port groups occupied by the downlink transmission data is equal to 1, it determines that the codeword mapping mode corresponding to the downlink transmission data is mapping mode I according to the number of transmission layers of the PDSCH. For the method for determining the codeword mapping mode described in item 1 of the scope of patent application, the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the number N of DMRS port groups occupied by the downlink transmission data, It also includes: the network side device transmits the codeword mapping mode to the terminal through signaling or implicitly, so that the terminal demodulates data according to the codeword mapping mode. According to the method for determining the codeword mapping mode described in item 1 of the scope of patent application, each DMRS port in the DMRS port group has a QCL relationship. A method for determining a codeword mapping method, the method comprising: a network side device receives a recommendation message reported by a terminal, and the recommendation message includes a recommended number of DMRS port groups and/or a recommended codeword mapping method; the recommended DMRS port The number of groups and/or the recommended codeword mapping method is determined by the terminal based on the downlink signal sent by the network side device through at least one transmission point; the network side device is determined according to the recommended number of DMRS port groups and/or The recommended codeword mapping mode determines the codeword mapping mode for downlink transmission data. The method for determining the codeword mapping method described in item 13 of the scope of patent application, wherein the network side device determines the codeword of the downlink transmission data according to the recommended number of DMRS port groups and/or the recommended codeword mapping method The mapping method includes: the network-side device determines the codeword mapping method of the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping method, and implementation configuration parameters, wherein the implementation configuration parameters are based on the The implementation of the network side equipment is determined. According to the method for determining the codeword mapping mode described in item 14 of the scope of patent application, the network side device determines the downlink transmission data according to the recommended number of DMRS port groups, the recommended codeword mapping mode and implementation configuration parameters The codeword mapping method includes: the network side device determines the codeword mapping method of the downlink transmission data and the downlink transmission data occupancy according to the recommended number of DMRS port groups, the recommended codeword mapping method, and the implementation configuration parameters The number of DMRS port groups. A method for determining a codeword mapping method, the method comprising: a terminal receives a downlink signal sent by a network side device through at least one transmission point; the terminal determines measurement data according to the downlink signal; the terminal reports the measurement data to the network side Device, so that the network side device determines the codeword mapping mode corresponding to the downlink transmission data according to the measurement data; the measurement data includes at least one of the following information: the number of DMRS port groups recommended by the terminal, and the codeword recommended by the terminal The mapping method and the number of transmission layers supported by each transmission point; if the network-side device determines that the codeword transmission mode corresponding to the downlink transmission data is double-codeword transmission, the network-side device will use the DMRS port group occupied by the downlink transmission data. number The quantity N determines the codeword mapping mode corresponding to the downlink transmission data; the network side device determines the number of DMRS port groups occupied by the downlink transmission data sent to the terminal, including: if the network side device determines the transmission layer supported by each transmission point If the number is greater than or equal to 1, it is determined that the number of DMRS port groups occupied by the downlink transmission data is greater than or equal to 2. If the network side device determines that the number of transmission layers supported by only one transmission point is greater than or equal to 1, then the downlink is determined The number of DMRS port groups occupied by transmission data is 1. For example, the method for determining the codeword mapping mode described in the scope of patent application, wherein the measurement data is the number of transmission layers supported by each transmission point, and the terminal reports the measurement data to the network side device, including: the The terminal adds the number of transmission layers supported by each transmission point to the channel status information CSI, and reports the CSI to the network side device. For example, the method for determining the codeword mapping mode according to any one of items 16 to 17 of the scope of patent application, wherein, before the terminal receives the downlink signal sent by the network side device through at least one transmission point, it further includes: the terminal determines the downlink sharing The number of transmission layers of the PDSCH channel is greater than 1. An electronic device includes: at least one processor; and a memory that is communicatively connected with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are processed by the at least one processor. The processor executes, so that the at least one processor can execute the method described in any one of items 1-12. An electronic device including: At least one processor; and a memory communicatively connected with the at least one processor; wherein the memory stores an instruction executable by the at least one processor, and the instruction is executed by the at least one processor to cause the At least one processor can execute the method described in any one of items 13 to 15 in the scope of the patent application. An electronic device includes: at least one processor; and a memory that is communicatively connected with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are processed by the at least one processor. The processor executes, so that the at least one processor can execute the method described in any one of the 16 to 18 patents. A non-transitory computer-readable storage medium that stores computer instructions for making the computer execute the method described in any one of items 1 to 18 in the scope of the patent application.

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