Signal transmission, signal reception methods, apparatus, devices, and storage media

Abstract

A signal transmission and signal reception method, device, equipment and storage medium, which relate to the field of communication technology, include: a first communication party determines a DMRS port corresponding to a reference signal that needs to be transmitted to a second communication party from among a DMRS port group, where each DMRS port in the DMRS port group occupies one resource element on average, and transmits the reference signal using the DMRS port; and a second communication party checks a DMRS port in the DMRS port group corresponding to a reference signal that the first communication party needs to transmit, where each DMRS port in the DMRS port group occupies one resource element on average, and receives the reference signal transmitted using the DMRS port. According to the technical solution provided by the embodiment of the present invention, the maximum number of DMRS ports that can be supported by the CP-OFDM waveform reaches the number of REs included in the OFDM symbol occupied by the DMRS port group.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to signal transmission, signal reception methods, apparatuses, devices, and storage media.

Background Art

[0002] MIMO (Multiple Input Multiple Output) is one of the important technologies in the NR (New Radio Access Technology) system. In the MIMO scenario, the requirements for the multiplexing capacity of DL (Down Link) and UL (Up Link) DMRS (De-Modulation Reference Signal) from various use cases are increasing. In this case, it is necessary to support a larger number of DMRS ports with the CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) waveform.

Summary of the Invention

[0003] The objective of the embodiments according to the present invention is to provide a signal transmission, signal reception method, apparatus, device, and storage media that can increase the number of DMRS ports supported by the CP-OFDM waveform. The specific technical solutions are as follows.

[0004] In a first aspect, the embodiments according to the present invention provide a signal transmission method applied to a first communication partner, the method comprising:

[0005] determining a DMRS port corresponding to a reference signal that needs to be transmitted to a second communication partner among a DMRS port group, wherein each DMRS port in the DMRS port group occupies one resource element on average; transmitting the reference signal using the DMRS port. The first communication partner is a base station and the second communication partner is a UE (User Equipment), or the first communication partner is a UE and the second communication partner is a base station.

[0006] In a second aspect, an embodiment of the present invention provides a signal receiving method applicable to a second communication partner, the method being: The method involves determining which DMRS port in a DMRS port group corresponds to the reference signal that the first communication partner needs to transmit, wherein each DMRS port in the DMRS port group occupies an average of one resource element. This includes receiving the reference signal transmitted using the DMRS port, The first communication partner is a base station and the second communication partner is a UE, or the first communication partner is a UE and the second communication partner is a base station.

[0007] In a third aspect, an embodiment of the present invention provides a signal transmitting device applicable to a first communication partner, the device is A determination means for determining the DMRS port corresponding to the reference signal that the first communication partner needs to transmit from a DMRS port group, and for determining that each DMRS port in the DMRS port group occupies an average of one resource element, The system includes a transmitting means for transmitting the reference signal using the DMRS port, The first communication partner is a base station and the second communication partner is a UE, or the first communication partner is a UE and the second communication partner is a base station.

[0008] In a fourth aspect, an embodiment of the present invention provides a signal receiving device applied to a second communication partner, the device being A determination means for determining the DMRS port corresponding to the reference signal that the first communication partner needs to transmit from a DMRS port group, and for determining that each DMRS port in the DMRS port group occupies an average of one resource element, The system includes receiving means for receiving the reference signal transmitted using the DMRS port, The first communication partner is a base station and the second communication partner is a UE, or the first communication partner is a UE and the second communication partner is a base station.

[0009] In a fifth aspect, an embodiment of the present invention provides an electronic device including a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions that can be executed by the processor, and the machine-executable instructions cause the processor to implement any method step described in the first aspect or any method step described in the second aspect.

[0010] In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium in which a computer program is stored, and when the computer program is executed by a processor, it realizes any method step described in the first aspect or any method step described in the second aspect.

[0011] In a seventh aspect, an embodiment of the present invention provides a computer program which, when executed by a processor, realizes any method step described in the first aspect or any method step described in the second aspect.

[0012] In the technical solution provided by the embodiment of the present invention, when receiving or transmitting a reference signal, the first communication partner transmits the reference signal to the second communication partner using the corresponding DMRS port in the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE. Thus, the maximum number of DMRS ports that can be supported by the CP-OFDM waveform is equal to the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0013] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the above advantages simultaneously.

Brief Description of the Drawings

[0014] To more clearly explain the technical solutions of the embodiments of the present invention and the prior art, the drawings used in the embodiments and the prior art will be briefly described below. However, the drawings described below are merely some embodiments of the present invention, and it is obvious that other drawings can be obtained based on these drawings without creative effort for those skilled in the art.

[0015] [Figure 1] FIG. 1 is a first type of schematic diagram in the related art where a DMRS port group occupies an OFDM symbol.

[0016] [Figure 2] FIG. 2 is a second type of schematic diagram in the related art where a DMRS port group occupies an OFDM symbol.

[0017] [Figure 3] FIG. 3 is a flowchart of one signal transmission method provided by an embodiment of the present invention.

[0018] [Figure 4] FIG. 4 is a schematic diagram of one single OFDM symbol provided by an embodiment of the present invention.

[0019] [Figure 5] FIG. 5 is a first type of schematic diagram of a dual OFDM symbol provided by an embodiment of the present invention.

[0020] [Figure 6] FIG. 6 is a second type of schematic diagram of a dual OFDM symbol provided by an embodiment of the present invention.

[0021] [Figure 7]Figure 7 is a schematic diagram of the third type of dual OFDM symbol provided by the embodiment of the present invention.

[0022] [Figure 8] Figure 8 is a schematic diagram of the fourth type of dual OFDM symbol provided by the embodiment of the present invention.

[0023] [Figure 9] Figure 9 is a schematic diagram of one of the frequency domain offsets corresponding to a in FIG. 5, a in FIG. 6, and a in FIG. 7.

[0024] [Figure 10] Figure 10 is a schematic diagram of the fifth type of dual OFDM symbol provided by the embodiment of the present invention.

[0025] [Figure 11] Figure 11 is a schematic diagram of one way to realize a DMRS port group with a front DMRS and an additional DMRS provided by the embodiment of the present invention.

[0026] [Figure 12] Figure 12 is a schematic diagram of one way to realize a DMRS port group with a front DMRS provided by the embodiment of the present invention.

[0027] [Figure 13] Figure 13 is a schematic diagram of one way to realize a DMRS port group with an additional DMRS provided by the embodiment of the present invention.

[0028] [Figure 14] Figure 14 is a schematic diagram of one way that a DMRS port group implemented in a continuous time slot occupies symbols provided by the embodiment of the present invention.

[0029] [Figure 15] Figure 15 is a schematic diagram of one way that a DMRS port group implemented between time slots occupies symbols provided by the embodiment of the present invention.

[0030] [Figure 16] Figure 16 is a schematic flowchart of the first type of signal reception method provided in an embodiment of the present invention.

[0031] [Figure 17] Figure 17 is a schematic flowchart of a second type of signal reception method provided in an embodiment of the present invention.

[0032] [Figure 18] Figure 18 is a schematic diagram of one signal transmission device provided by an embodiment of the present invention.

[0033] [Figure 19] Figure 19 is a schematic diagram of the first type of signal receiving device provided in an embodiment of the present invention.

[0034] [Figure 20] Figure 20 is a schematic diagram of a second type of signal receiving device provided in an embodiment of the present invention.

[0035] [Figure 21] Figure 21 is a schematic diagram of one electronic device provided by an embodiment of the present invention. [Modes for carrying out the invention]

[0036] The following describes the technical aspects of embodiments of the present invention clearly and completely with reference to the drawings of the embodiments; however, it is clear that the embodiments described are only a subset of the present invention and not all embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can obtain based on the present invention are within the scope of the protection of the present invention.

[0037] The following explanation will describe the terms used in the embodiments of this invention.

[0038] DMRS is used for channel estimation and demodulation of uplink and downlink reference signals.

[0039] A DMRS port group occupies one or more OFDM symbols, and a DMRS port group includes multiple DMRS ports and / or CDM (Code Division Multiplexing) groups, and a single CDM group includes multiple DMRS ports. DMRS ports within the same CDM group are indistinguishable in the time domain or frequency domain, and are only distinguishable in the code domain.

[0040] In the embodiment of the present invention, the symbol is an OFDM symbol, and one OFDM symbol contains 12 REs (Resource Elements).

[0041] MIMO is one of the key technologies in NR systems. In 3GPP (3rd Generation Partnership Project) Rel (Release, Candidate Version) 15 / 16 / 17, the characteristics of MIMO correlation were studied and standardized for FDD (Frequency Division Duplex) and TDD (Time Division Duplex) systems. The main focus was on DL MIMO operation. The main focus of Rel-18 is the requirement for augmentation functions necessary for the identification and standardization of UL MIMO, as well as augmentation functions necessary for the introduction of DL MIMO to meet the evolutionary requirements of NR implementation, thereby favoring the use of large antenna arrays applicable to FR1 (Frequency Range 1) and FR2 (Frequency Range 2). The augmentation functions required for the above UL MIMO and DL MIMO relate to the following MIMO augmentation areas.

[0042] There is a growing demand for multiplexing capacity for DL ​​and UL DMRS in various practical applications. Therefore, it is necessary to increase the number of orthogonal ports for forwarding DMRS. Here, the orthogonal ports for forwarding DMRS are the DMRS ports described in the embodiment of the present invention.

[0043] The technical solution provided by the embodiment of the present invention is designed to address the above-mentioned problems and increases the number of DMRS ports supported by CP-OFDM waveforms.

[0044] Currently, from a standardization perspective, 3GPP Rel-15 / 16 / 17 supports a maximum of 12 DMRS ports for CP-OFDM waveforms, and it is not possible to directly expand to more than 12 DMRS ports. Specifically, DMRS in the current standard is divided into DMRS configuration type 1 and DMRS configuration type 2.

[0045] DMRS configuration type 1 can support four orthogonal DMRS ports, as shown in Figure 1a, when a DMRS port group occupies one OFDM symbol, and can support up to eight orthogonal DMRS ports, as shown in Figure 1b, when a DMRS port group occupies two OFDM symbols. In Figures 1a and 1b, one rectangular frame represents one RE, and one row of rectangular frames represents one OFDM symbol.

[0046] As shown in Figure 1a, a rectangular box with the number 0 represents an RE occupied by one CDM group, which includes DMRS port 0 and DMRS port 1. A rectangular box with the number 1 represents an RE occupied by one CDM group, which includes DMRS port 2 and DMRS port 3. As can be seen, when a DMRS port group occupies one OFDM symbol, i.e., a single OFDM symbol, it can support up to four DMRS ports.

[0047] As shown in Figure 1b, a rectangular box with the number 0 represents an RE occupied by one CDM group, which includes DMRS ports 0, 1, 4, and 5. A rectangular box with the number 1 represents an RE occupied by one CDM group, which includes DMRS ports 2, 3, 6, and 7. As can be seen, when a DMRS port group occupies two OFDM symbols, i.e., a dual OFDM symbol, it can support up to eight DMRS ports.

[0048] As can be seen from Figures 1a and 1b, DMRS configuration type 1 can support up to eight DMRS ports, with each DMRS port occupying an average of 3 RE / RB (Resource Blocks).

[0049] DMRS configuration type 2 allows a single OFDM symbol to support up to six orthogonal DMRS ports, as shown in Figure 2a, and a dual OFDM symbol to support up to twelve orthogonal DMRS ports, as shown in Figure 2b. As shown in Figures 2a and 2b, one rectangular frame represents one RE, and one row of rectangular frames represents one OFDM symbol.

[0050] As shown in Figure 2a, a rectangular box with the number 0 represents REs occupied by one CDM group, which includes DMRS port 0 and DMRS port 1. A rectangular box with the number 1 represents REs occupied by one CDM group, which includes DMRS port 2 and DMRS port 3. A rectangular box with the number 2 represents REs occupied by one CDM group, which includes DMRS port 4 and DMRS port 5. As can be seen, a single OFDM symbol can support up to six DMRS ports.

[0051] As shown in Figure 2b, a rectangular box with the number 0 represents REs occupied by one CDM group, which includes DMRS ports 0, 1, 6, and 7. A rectangular box with the number 1 represents REs occupied by one CDM group, which includes DMRS ports 2, 3, 8, and 9. A rectangular box with the number 2 represents REs occupied by one CDM group, which includes DMRS ports 4, 5, 10, and 11. As can be seen, a dual OFDM symbol can support up to 12 DMRS ports.

[0052] As can be seen from Figures 2a and 2b, DMRS configuration type 2 can support up to 12 DMRS ports, with each DMRS port occupying an average of 2 RE / RB.

[0053] As described above, from a standardization perspective, 3GPP Rel-15 / 16 / 17 can currently support a maximum of 12 orthogonal DMRS ports and cannot be directly extended to more orthogonal DMRS ports. Therefore, a redesign is needed to support more orthogonal DMRS ports.

[0054] In view of this, in the signal transmission method and signal reception method provided by the embodiment of the present invention, the first communication partner transmits a reference signal to the second communication partner using a corresponding DMRS port from a DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE, so that the maximum number of DMRS ports that can be supported by a CP-OFDM waveform reaches the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0055] The following will describe in detail, using specific examples, the signal transmission method and signal reception method provided by the embodiment of the present invention.

[0056] Referring to Figure 3, which is a schematic flowchart of one signal transmission method provided in an embodiment of the present invention, the method is applicable to a first communication partner, which may be a base station or an UE. If the first communication partner is a base station, the second communication partner is an UE, and if the first communication partner is an UE, the second communication partner is a base station. In embodiments of the present invention, the UE may be a high-level UE such as CPE (Customer Premise Equipment), FWA (Fixed Wireless Access), vehicles, and industrial equipment. The above signal transmission method includes the following steps.

[0057] In step S31, the DMRS port corresponding to the reference signal that needs to be sent to the second communication partner is determined from the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE.

[0058] Step S32, transmit a reference signal using the DMRS port.

[0059] In the technical solution provided by the embodiment of the present invention, when transmitting a reference signal, the first communication partner transmits the reference signal to the second communication partner using the corresponding DMRS port in the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE, so that the maximum number of DMRS ports that can be supported by the CP-OFDM waveform reaches the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0060] In the embodiment of the present invention, the base station may have pre-configured information such as the number of symbols to be used by the DMRS port group, the symbols used by the DMRS port group, the DMRS ports and CDM groups included in the DMRS port group, the number of each DMRS port, and the number of each DMRS port included in the CDM group.

[0061] In a DMRS port group, each DMRS port is orthogonal in the time domain, frequency domain, or code domain. The DMRS includes forward DMRS and additional DMRS, and the DMRS port group in the embodiment of the present invention may be used as either forward DMRS ports or additional DMRS ports. That is, the DMRS port group may be located at forward symbol positions or additional symbol positions. The number of forward symbols may be set according to actual requirements; if the number of forward symbols is 3, i.e., the first three symbols are forward symbols, then the additional symbols are symbols located at any position after the forward symbols. Additional DMRS ports are used in medium / high-speed scenes and can satisfy estimation accuracy for channel time variation. An additional DMRS port is simply a copy of a forward DMRS port; that is, the additional DMRS port and the forward DMRS port must match in terms of DMRS port number, sequence, number of occupied OFDM symbols, and OCC (Orthogonal Cover Code). Therefore, if a forward DMRS is designed, there is no need to specifically design an additional DMRS.

[0062] The following describes the design of a DMRS port group, using a forward DMRS port as an example.

[0063] In some embodiments, the number of symbols occupied by a DMRS port group is 1, meaning that the DMRS port group occupies one OFDM symbol, i.e., a single OFDM symbol. In this case, if there are no CDM groups in the DMRS port group, each DMRS port included in the DMRS port group occupies one RE in frequency division multiplexing, as shown in Figure 4a. As shown in Figure 4a, one rectangular box represents one RE, and one row of rectangular boxes represents one symbol. As shown in Figure 4a, each rectangular box with the number 0 to 11 represents an RE occupied by one DMRS port. As shown in Figure 4a, the number of the DMRS port corresponding to each numbered rectangular box can be set according to the actual requirements.

[0064] For example, the DMRS port numbers corresponding to each numbered rectangular box may be set in order. For instance, the DMRS port number corresponding to the rectangular box with the number 0 is 0, the DMRS port number corresponding to the rectangular box with the number 1 is 1, and the DMRS port number corresponding to the rectangular box with the number 2 is 3. This can be used as an analogy.

[0065] The DMRS port numbers corresponding to each numbered rectangular frame may be set at predetermined intervals. For example, if the predetermined value is 2, then the DMRS port number corresponding to the rectangular frame with the number 0 is 0, the DMRS port number corresponding to the rectangular frame with the number 1 is 2, and the DMRS port number corresponding to the rectangular frame with the number 2 is 4. This is used for inference.

[0066] As can be seen from Figure 4a, in the case of a single OFDM symbol, the embodiment of the present invention can support up to 12 DMRS ports. This increases the number of DMRS ports supported in the case of a single OFDM symbol while maintaining the occupancy of only one OFDM symbol, similar to forward DMRS, without increasing the DMRS overhead in Rel-15 / 16 / 17.

[0067] In some embodiments, the number of symbols occupied by a DMRS port group is 1, meaning that the DMRS port group occupies one OFDM symbol, i.e., it is a single OFDM symbol. In this case, if a CDM group exists within the DMRS port group, and each CDM group contains a first preset number of DMRS ports, then the CDM group included in the DMRS port group occupies a first preset number of REs in a frequency domain CDM scheme of a first preset length, the value of the first preset number is the same as the value of the first preset length, and the value of the first preset number is 2 or greater.

[0068] As an example, let's consider the first preset number value as 2. As shown in Figure 4b, each CDM group includes two DMRS ports. In a frequency domain CDM scheme with a length of 2, each CDM group within a DMRS port group occupies two REs in the symbol occupied by the DMRS port group. As shown in Figure 4b, one rectangular frame represents one RE, and a row of rectangular frames represents one symbol. As shown in Figure 4b, each rectangular frame with a number from 0 to 5 represents an RE occupied by one CDM group. As shown in Figure 4b, the number of the DMRS ports included in each CDM group may be set according to the actual requirements.

[0069] For example, the DMRS port numbers within each CDM group may be assigned sequentially. In the CDM group corresponding to the rectangular frame with the number 0, the DMRS port numbers are 0 and 1; in the CDM group corresponding to the rectangular frame with the number 1, the DMRS port numbers are 2 and 3; and in the rectangular frame with the number 3, the DMRS port numbers are 4 and 5. This is used as an analogy.

[0070] In the CDM group corresponding to each numbered rectangular frame, the DMRS port numbers may be set at predetermined intervals. For example, if the predetermined value is 2, then in the CDM group corresponding to the rectangular frame with the number 0, the DMRS port numbers are 0 and 2; in the CDM group corresponding to the rectangular frame with the number 1, the DMRS port numbers are 4 and 6; and in the CDM group corresponding to the rectangular frame with the number 3, the DMRS port numbers are 8 and 10. This is used for analogy.

[0071] In the embodiments of the present invention, as shown in Figure 4b, the REs of the first preset number occupied by each CDM group may be adjacent. Alternatively, the REs of the first preset number occupied by each CDM group do not have to be adjacent. For example, Figure 4c is a schematic diagram showing the OFDM symbols occupied by a DMRS port group when the first preset number is 2. As shown in Figure 4c, one rectangular frame represents one RE, and one row of rectangular frames represents one symbol. As shown in Figure 4c, each rectangular frame with a number from 0 to 5 represents an RE occupied by one CDM group, and multiple rectangular frames with the same number correspond to one CDM group. As shown in Figure 4c, the number of DMRS ports included in each CDM group may be set according to actual requirements, and specifically, refer to the correlation description in part of Figure 4b.

[0072] As can be seen from Figures 4b and 4c, in the case of a single OFDM symbol, the embodiment of the present invention supports up to 12 DMRS ports. This increases the number of DMRS ports supported in the case of a single OFDM symbol while maintaining the occupancy of only one OFDM symbol, similar to forward DMRS, without increasing the overhead of DMRS in Rel-15 / 16 / 17.

[0073] In some embodiments, the number of symbols occupied by a DMRS port group is a preset value, and this preset value is 2 or more, meaning that the DMRS port group occupies multiple OFDM symbols, i.e., it is a multi-OFDM symbol. In this case, if there are no CDM groups in the DMRS port group, each DMRS port included in the DMRS port group can occupy one RE in both frequency division multiplexing and time division multiplexing.

[0074] Let's explain using the example of a preset value of 2. In this case, the DMRS port group occupies two OFDM symbols, i.e., it is a dual OFDM symbol, and the two OFDM symbols contain 24 REs. In frequency division multiplexing and time division multiplexing, each DMRS port included in the DMRS port group occupies one RE, and in this case, 13, 14, ..., 24 DMRS ports can be supported. Figures 5a to 5l are schematic diagrams showing the OFDM symbols occupied by the DMRS port group. As shown in Figures 5a to 5l, one rectangular frame represents one RE, and a row of rectangular frames represents one symbol. As shown in Figures 5a to 5l, the rectangular frames numbered 0 to 23 each represent an RE occupied by one DMRS port, and the rectangular frames without numbers represent unused REs. As shown in Figures 5a to 5l, the DMRS port numbers corresponding to each numbered rectangular frame may be set according to actual requirements. For example, the DMRS port numbers corresponding to each rectangular frame may be installed sequentially, or they may be installed at predetermined intervals.

[0075] As can be seen from Figures 5a-l, in the case of dual OFDM symbols, the embodiment of the present invention supports up to 24 DMRS ports. This increases the number of DMRS ports supported in the case of dual OFDM symbols without increasing the DMRS overhead in Rel-15 / 16 / 17, while maintaining the occupancy of only two OFDM symbols, similar to forward DMRS.

[0076] In some embodiments, the number of symbols occupied by a DMRS port group is a preset value, and this preset value is 2 or more, i.e., multiple OFDM symbols occupied by the DMRS port group, i.e., multi-OFDM symbols. In this case, if a DMRS port group contains DMRS ports that do not belong to a CDM group, and CDM groups also exist, each CDM group contains a number of DMRS ports equal to the preset value, and each DMRS port in a DMRS port group that is not in a CDM group occupies one RE in frequency division multiplexing and time division multiplexing. Each CDM group in a DMRS port group occupies a number of resource elements equal to the preset value in frequency division multiplexing and time-domain CDM where the length is a preset value, and each CDM group contains a number of DMRS ports equal to the preset value.

[0077] Let's explain using the example of a preset value of 2. In this case, a DMRS port group occupies two OFDM symbols, i.e., it is a dual OFDM symbol, and the two OFDM symbols contain 24 REs, and each CDM group contains two DMRS ports. In frequency division multiplexing and time division multiplexing, each DMRS port other than a CDM group (i.e., each independent DMRS port) occupies one RE, as shown in Figure 6a, for DMRS ports 1, 2, ..., 11, etc. In frequency division multiplexing and time-domain CDM with a length of 2, each CDM group occupies two REs, as shown in Figure 6b, for CDM group 0 and CDM group 1, etc. In this case, 13, 14, ..., 24 DMRS ports can be supported. Figures 6a-l are schematic diagrams showing the OFDM symbols occupied by DMRS port groups. As shown in Figures 6a-l, one rectangular frame represents one RE, and one row of rectangular frames represents one symbol. As shown in Figures 6a to 6l, each rectangular frame with the numbers 0 to 11 represents a RE occupied by one DMRS port or CDM group, a rectangular frame without a number represents an unused RE, and multiple rectangular frames with the same number correspond to one CDM group. As shown in Figures 6a to 6l, the DMRS port numbers corresponding to each rectangular frame may be set according to actual requirements, and the DMRS port numbers in the CDM group corresponding to each rectangular frame may also be set according to actual requirements. For example, the DMRS port numbers corresponding to each rectangular frame may be set sequentially or at predetermined intervals. The DMRS port numbers in the CDM group corresponding to each rectangular frame may be set sequentially or at predetermined intervals.

[0078] As can be seen from Figures 6a-l, in the case of dual OFDM symbols, the embodiment of the present invention supports up to 24 DMRS ports. This increases the number of DMRS ports supported in the case of dual OFDM symbols without increasing the DMRS overhead in Rel-15 / 16 / 17, while maintaining the occupancy of only two OFDM symbols, similar to forward DMRS.

[0079] In some embodiments, the number of symbols occupied by a DMRS port group is a preset value, and this preset value is 2 or more, i.e., multiple OFDM symbols occupied by the DMRS port group, i.e., multi-OFDM symbols. In this case, if there are no DMRS ports in a DMRS port group that do not belong to a CDM group, and only CDM groups exist, then each CDM group contains a second preset number of DMRS ports, and each CDM group contained within each DMRS port in the DMRS port group occupies a second preset number of REs in a frequency domain CDM scheme with a second preset length and a time domain CDM scheme whose length is a preset value. The value of the second preset number is greater than or equal to the value of the second preset length, and less than or equal to a second preset length that is a multiple of the preset value.

[0080] Let's take the example where the preset value is 2 and the second preset length is 2. The number of second presets is 2 or more and 4 or less. In this case, the DMRS port group occupies two OFDM symbols, i.e., it is a dual OFDM symbol, and the two OFDM symbols contain 24 REs, and each CDM group contains two DMRS ports. In frequency-domain CDM and time-domain CDM schemes with a length of 2, each CDM group occupies 2 to 4 REs. In this case, 13, 14, ..., 24 DMRS ports can be supported. Figures 7a to 7l are schematic diagrams showing OFDM symbols occupied by DMRS port groups. As shown in Figures 7a to 7l, one rectangular frame represents one RE, and a row of rectangular frames represents one symbol. As shown in Figures 7a-l, the rectangular frames numbered 0-5 each represent REs occupied by one CDM group, while the rectangular frames without numbers represent unused REs. Multiple rectangular frames with the same number correspond to one CDM group. As shown in Figures 7a-l, the DMRS port numbers in the CDM group corresponding to each numbered rectangular frame may be set according to actual requirements. For example, the DMRS port numbers in the CDM group corresponding to each numbered rectangular frame may be set sequentially or at predetermined intervals.

[0081] As can be seen from Figures 7a-l, in the case of dual OFDM symbols, the embodiment of the present invention supports up to 24 DMRS ports. This increases the number of DMRS ports supported in the case of dual OFDM symbols without increasing the overhead of DMRS in Rel-15 / 16 / 17, while maintaining the use of only two OFDM symbols, similar to forward DMRS.

[0082] In the embodiments of the present invention, as shown in Figures 7a to 7l, the multiple REs occupied by each CDM group in each symbol may be adjacent. The multiple REs occupied by each CDM group in each symbol do not have to be adjacent; for example, Figures 8a to 8l are schematic diagrams showing OFDM symbols occupied by a DMRS port group. As shown in Figures 8a to 8l, one rectangular frame represents one RE, and one row of rectangular frames represents one symbol. As shown in Figures 8a to 8l, the rectangular frames numbered 0 to 5 each represent an RE occupied by one CDM group, and multiple rectangular frames with the same number correspond to one CDM group. As shown in Figures 8a to 8l, the numbers of the DMRS ports included in each CDM group may be set according to actual requirements; specifically, refer to the correlation description in parts 7a to 7l.

[0083] In some embodiments, for a target symbol among all symbols occupied by a DMRS port group, the occupied resource elements are offset by a preset amount relative to the start position of the target symbol. The target symbol is a symbol in the DMRS port group that has resource elements not occupied by DMRS ports, and the preset offset amount represents the number of REs to offset in the frequency domain. The magnitude of the preset offset amount may be set according to actual requirements and is not limited thereto.

[0084] Let's explain using the example of a preset value of 2 and a preset offset amount of 5. Figure 9a is a schematic diagram showing the frequency domain offset corresponding to the case of supporting 13 DMRS ports as shown in Figure 5a. As can be seen from Figure 9a, there is an unoccupied RE in the second symbol occupied by the DMRS port group, the second symbol is the target symbol, and the RE occupied by DMRS port 12 in the second symbol is offset by 5 REs relative to the start position of the second symbol. Figure 9b is a schematic diagram showing the frequency domain offset corresponding to the case of supporting 13 DMRS ports as shown in Figure 6a. As can be seen from Figure 9b, there is an unoccupied RE in the second symbol occupied by the DMRS port group, the second symbol is the target symbol, and the RE occupied by CDM group 5 in the second symbol is offset by 5 REs relative to the start position of the second symbol. Figure 9c is a schematic diagram showing the frequency domain offset corresponding to the case of supporting 13 DMRS ports as shown in Figure 7a. As can be seen from Figure 9c, there is an unoccupied RE in the second symbol occupied by the DMRS port group, the second symbol is the target symbol, and the RE occupied by CDM group 2 in the second symbol is offset by 5 REs relative to the starting position of the second symbol. The frequency domain offsets corresponding to supporting 14, 15, ..., 24 DMRS ports are similar to the frequency domain offsets corresponding to supporting 13 DMRS ports, so we will omit their explanation here.

[0085] In the case of dual OFDM symbols, compared to technologies supporting up to 12 DMRS ports in related technologies, the proposed technology provided in the embodiments of the present invention reduces the RE occupied by each DMRS port in order to support more DMRS ports. For example, in the case of 24 DMRS ports, it reduces the RE to the point where each DMRS port in each PRB (Physical Resource Block) occupies only one RE. Therefore, in MU-MIMO scenes with multiple DMRS ports, the proposed technology provided in the embodiments of the present invention can be supported in environments with low frequency selectivity, such as outdoor environments in small open spaces like small outdoor concerts, tennis courts, or outdoor cafes.

[0086] In some embodiments, the number of symbols occupied by a DMRS port group is a preset value, and this preset value is 2 or more, meaning that the DMRS port group occupies multiple OFDM symbols, i.e., it is a multi-OFDM symbol. In this case, each DMRS port included in the DMRS port group occupies one RE using frequency division multiplexing. Here, the DMRS port may be a port in a CDM group, or it may not be a port in a CDM group. In other words, in embodiments of the present invention, the DMRS port group can occupy an RE in the frequency domain using frequency division multiplexing, occupy an RE in the time domain using time division multiplexing as shown in Figure 5, and occupy an RE in the time domain using time domain CDM of a predetermined length as shown in Figure 6.

[0087] In some embodiments, the number of symbols occupied by a DMRS port group is a preset value, and this preset value is 2 or more, meaning that the DMRS port group occupies multiple OFDM symbols, i.e., it is a multi-OFDM symbol. In this case, each DMRS port included in the DMRS port group occupies one RE using time-division multiplexing. Here, the DMRS port may be a port in a CDM group, or it may not be a port in a CDM group. In other words, in embodiments of the present invention, the DMRS port group may occupy the RE in the time domain using time-division multiplexing, and in the frequency domain, it may occupy the RE using frequency-division multiplexing as shown in Figure 5, or in the frequency domain, it may occupy the RE with a frequency domain CDM of a predetermined length as shown in Figure 10. In Figure 10, the rectangular frames with the numbers 0 to 8 each represent an RE occupied by one CDM group, the rectangular frames without numbers represent unused REs, and multiple rectangular frames with the same number correspond to one CDM group.

[0088] In some embodiments, some symbols occupied by a DMRS port group are located in forward symbol positions, while other symbols occupied by the DMRS port group are located in additional symbol positions. In embodiments of the present invention, DMRS ports located in forward symbol positions may be referred to as forward DMRS ports, and DMRS ports located in additional symbol positions may be referred to as additional DMRS ports. Together, forward DMRS ports and additional DMRS ports can support a greater number of orthogonal DMRS ports, and DMRS ports in a DMRS port group may belong to one or more CDM combinations, or may not belong to any CDM combination; there are no limitations on this.

[0089] Let's explain using the example of a preset value of 2. Assuming the first three symbols are forward symbols, as shown in Figure 11, of the two OFDM symbols occupied by the DMRS port group, the first OFDM symbol is the third symbol in one time slot, meaning the first OFDM symbol is located in the forward symbol position, and the second OFDM symbol is the eighth symbol in one time slot, meaning the second OFDM symbol is located in the additional symbol position behind the forward symbol. In this case, the first OFDM symbol is realized by the forward symbol, and the DMRS port in the second OFDM symbol is realized by the additional symbol. The number of additional symbols and the position of the additional symbols in one time slot are flexible and variable. In Figure 11, the rectangular frames with the numbers 0 to 11 each represent REs occupied by one CDM group, the rectangular frames without numbers represent unused REs, and multiple rectangular frames with the same number correspond to one CDM group.

[0090] The technical solution provided in the embodiment of the present invention is designed to increase the number of DMRS ports without increasing the current DMRS overhead, that is, to increase the number of DMRS ports by using only one or two OFDM symbols. The addition of DMRS expands the scope of application of the technical solution provided in the embodiment of the present invention.

[0091] In one embodiment, in a DMRS port group, all symbols occupied by all DMRS ports are located in the forward symbol position. In embodiments of the present invention, the DMRS ports in the DMRS port group may belong to one or more CDM combinations, or they may not belong to any CDM combination, and there are no limitations on this.

[0092] Let's explain using the example of a preset value of 2. Assuming the first four symbols are forward symbols, as shown in Figure 12, a DMRS port group occupies two OFDM symbols, and these two OFDM symbols are the third and fourth symbols in one time slot, respectively, meaning these two OFDM symbols are located in the forward symbol positions. In Figure 12, the rectangular boxes numbered 0 to 11 each represent REs occupied by one CDM group, the rectangular boxes without numbers represent unused REs, and multiple rectangular boxes with the same number correspond to one CDM group.

[0093] In one embodiment, in a DMRS port group, all symbols occupied by all DMRS ports are located in the additional symbol position. In embodiments of the present invention, the DMRS ports in a DMRS port group may belong to one or more CDM combinations, or they may not belong to any CDM combination; there is no limitation on this.

[0094] Let's explain using the example of a preset value of 2. Assuming the first four symbols are forward symbols, as shown in Figure 13, the DMRS port group occupies two OFDM symbols, these two OFDM symbols being the 7th and 8th symbols in one time slot, respectively, meaning these two OFDM symbols are located in the additional symbol positions after the forward symbols. In Figure 13, the rectangular boxes numbered 0-11 each represent REs occupied by one CDM group, the rectangular boxes without numbers represent unoccupied REs, and multiple rectangular boxes with the same number correspond to one CDM group.

[0095] In the embodiments of this invention, the number of forward symbols may be set according to the actual requirements.

[0096] In some embodiments, the symbols occupied by the DMRS port group were assigned to one or more time slots. When the symbols occupied by the DMRS port group are assigned to multiple time slots, these time slots may or may not be consecutive. In each time slot, the number of symbols occupied by the DMRS port group and their position within the time slot are flexible and variable, and the DMRS port group in each time slot may be located in a forward symbol position or in an additional symbol position.

[0097] Let's explain using the example of a preset value of 2. In one time slot, a DMRS port group occupies one OFDM symbol. Here, this one OFDM symbol is assigned to two time slots, and these two time slots may be consecutive, as shown in Figure 14, or they may be discontinuous, as shown in Figure 15. In Figures 14 and 15, the rectangular boxes numbered 0 to 11 each represent REs occupied by one DMRS port, and the rectangular boxes without numbers represent REs that are not occupied.

[0098] Based on the arrangement of symbols occupied by the DMRS port group corresponding to the time slot, step S31 may determine, based on the symbols occupied by the DMRS port group assigned to the current time slot, the DMRS port corresponding to the reference signal that needs to be transmitted to the second communication partner among the DMRS port groups in the current time slot. Here, the symbols occupied by the DMRS port group assigned to the current time slot may also be placed in other time slots, that is, the symbols occupied by the DMRS port group may be placed in multiple time slots.

[0099] The technical solution provided in the embodiment of the present invention is designed to increase the number of DMRS ports without increasing the current DMRS overhead, that is, to increase the number of DMRS ports by using only one or two OFDM symbols. Multiple time slots expand the applicability of the technical solution provided in the embodiment of the present invention. For example, it is suitable for scenarios where sensitivity to demodulation delay is not required and a large amount of reference signal needs to be transmitted.

[0100] In some embodiments, if the first communication partner is a base station and the second communication partner is an UE, the first communication partner may also transmit a DCI with a preset number of bits to the second communication partner. This DCI indicates the DMRS port in the DMRS port group that corresponds to the reference signal. The maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

[0101] If the second communication partner is a base station and the first communication partner is an UE, the first communication partner can also receive a DCI of a preset number of bits transmitted from the second communication partner. This DCI indicates the DMRS port in the DMRS port group that corresponds to the reference signal. The maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

[0102] For example, if the preset value is 2 and one OFDM symbol contains 12 REs, then the maximum number of DMRS ports in a DMRS port group is 2*12=24. The maximum value corresponding to 4 bits is 2 to the power of 4=16, and the maximum value corresponding to 5 bits is 2 to the power of 5=32. Since 16 < 24 < 32, the first communication partner can send a DCI of 5 bits or more to the second communication partner, or the first communication partner can receive a DCI of 5 bits or more sent from the second communication partner. In this way, the base station can assign DMRS ports to the UE for accurately receiving or transmitting UE reference signals.

[0103] For example, the base station retrieves the value of the port instruction information area assigned to the UE based on a pre-configured Rank arrangement, stores the value of the port instruction information area in the DCI, and transmits it to the UE. Subsequently, the base station transmits a reference signal to the UE based on the set of DMRS ports corresponding to the value of the port instruction information area in the DCI, and receives the reference signal transmitted from the UE. The UE transmits a reference signal to the base station based on the set of DMRS ports corresponding to the value of the port instruction information area in the DCI, and receives the reference signal transmitted from the base station.

[0104] The explanation uses the example of a maximum symbol length of 2, with Rank=1, Rank=12, and Rank=24. Refer to Table 1 for the Rank=1 arrangement, Table 2 for the Rank=12 arrangement, and Table 3 for the Rank=24 arrangement.

[0105] [Table 1]

[0106] As can be seen from Table 1, the value in the port instruction information area can represent a Value, a DMRS port can be represented by a DMRS CDM group(s), the number of DMRS CDM groups without data can be represented by Number of DMRS CDM group(s) without data, and the number of front-load symbols can be represented by Number of front-load symbols. Based on Table 1, the base station can randomly select one port instruction information area value from 0 to 23, put that port instruction information area value into the DCI, and transmit it to the UE. Subsequently, the base station transmits a reference signal to the UE based on the DMRS port corresponding to the port instruction information area value in the DCI, and receives the reference signal transmitted from the UE. The UE transmits a reference signal to the base station based on the DMRS port corresponding to the port instruction information area value in the DCI, and receives the reference signal transmitted from the base station.

[0107] [Table 2]

[0108] Based on Table 2, the base station can randomly select one port instruction information area value from 0 to 1, store that port instruction information area value in the DCI, and transmit it to the UE. Subsequently, the base station transmits a reference signal to the UE based on the 12 DMRS ports corresponding to the port instruction information area values ​​in the DCI, and receives the reference signal transmitted from the UE. The UE transmits a reference signal to the base station based on the 12 DMRS ports corresponding to the port instruction information area values ​​in the DCI, and receives the reference signal transmitted from the base station.

[0109] [Table 3]

[0110] Based on Table 3, the base station selects a value of 0 in the port instruction information area, places this value of 0 in the DCI, and transmits it to the UE. Subsequently, the base station transmits a reference signal to the UE based on the 24 DMRS ports corresponding to the values ​​in the port instruction information area in the DCI, and receives the reference signal transmitted from the UE. The UE transmits a reference signal to the base station based on the 24 DMRS ports corresponding to the values ​​in the port instruction information area in the DCI, and receives the reference signal transmitted from the base station.

[0111] In the embodiments of the present invention, the DMRS ports corresponding to the values ​​in each port instruction information area may be set according to the actual requirements. For example, the value 1 in the port instruction information area in Table 2 may correspond to DMRS port sets 0-5, 12-17, DMRS port sets 12-23, etc., and there are no limitations thereto.

[0112] To support a larger number of orthogonal DMRS ports, the technical proposals provided by embodiments of the present invention may be supported by making appropriate changes to the corresponding signaling processes, for example, by modifying or updating the design of DMRS instructions in the corresponding PBCH (Physical Broadcast Channel), RRC (Radio Resource Control), MAC CE (Media Access Control Customer Edge), or DCI. Specifically, potentially relevant signaling updates / modifications include correlation parameters such as the number of DMRS ports in the MIB (Master Information Block), SIB (System Information Block) 1, MSG (Message, Signaling) 2, MSG 4, RRC Setup, security Mode Command, and RRC Reconfiguration, the location information of symbols occupied by DMRS ports, the length of symbols occupied by DMRS, the mapping type, and whether or not additional DMRS are placed.

[0113] The technical solution provided in the embodiment of the present invention can increase the maximum number of DMRS ports supported by current standards from 12 to 24 without increasing the current DMRS overhead, satisfying the requirements for increased downlink and uplink DMRS multiplexing capacity and an increase in the number of DMRS orthogonal ports. For example, in new application scenarios such as holographic communications, real-time UHD (Ultra High Definition) video, security surveillance, machine vision, and augmented reality (XR), the requirements for downlink and uplink DMRS multiplexing capacity and an increase in the number of DMRS orthogonal ports are increasing.

[0114] Corresponding to the signal transmission method described above, as shown in Figure 16, an embodiment of the present invention provides a signal reception method applicable to a second communication partner. This method includes the following steps S161 and S162.

[0115] In step S161, the DMRS port corresponding to the reference signal that the first communication partner needs to transmit is determined from the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one resource element.

[0116] Step S162: Receive the reference signal transmitted using the DMRS port.

[0117] Here, the first communication partner is the base station and the second communication partner is the UE, or the first communication partner is the UE and the second communication partner is the base station.

[0118] In the technical solution provided by the embodiment of the present invention, when a reference signal is received, the first communication partner transmits the reference signal to the second communication partner using the corresponding DMRS port in the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE. Thus, the maximum number of DMRS ports that can be supported by the CP-OFDM waveform is equal to the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0119] In some examples, the number of symbols occupied by a DMRS port group is 1. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each CDM group included in a DMRS port group occupies a first preset number of resource elements using a frequency domain CDM scheme with a first preset length, and each CDM group contains a first preset number of DMRS ports, the value of the first preset number is the same as the value of the first preset length, and the value of the first preset number is 2 or greater.

[0120] In some embodiments, the first preset number of resource elements occupied by each CDM group are adjacent, or The resource elements of the first preset number occupied by each CDM group are not adjacent.

[0121] In some examples, the number of symbols occupied by a DMRS port group is a preset value, and the preset value is 2 or greater. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element using time-division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element in frequency division multiplexing and time division multiplexing, or Alternatively, each DMRS port in a DMRS port group, other than the CDM group, occupies one resource element using frequency division multiplexing and time division multiplexing, and each CDM group in a DMRS port group occupies one resource element using frequency division multiplexing and time-domain CDM with a preset length, and each CDM group contains a preset number of DMRS ports, or Each CDM group included in a DMRS port group occupies a second preset number of resource elements using a frequency-domain CDM scheme with a second preset length and a time-domain CDM scheme with a length equal to a preset value. Each CDM group includes a second preset number of DMRS ports, and the second preset number is greater than or equal to the second preset length and less than or equal to a second preset length that is a multiple of the preset value.

[0122] In some embodiments, for a target symbol among all symbols occupied by a DMRS port group, the occupied resource element is offset by a preset amount relative to the starting position of the target symbol, and the target symbol is a symbol in which there are resource elements not occupied by DMRS ports included in the DMRS port group.

[0123] In some embodiments, the multiple resource elements occupied by each CDM group in each symbol are adjacent to each other, or In each symbol, the multiple resource elements occupied by each CDM group are not adjacent.

[0124] In some embodiments, some symbols occupied by the DMRS port group are located in forward symbol positions, while other symbols occupied by the DMRS port group are located in additional symbol positions, or All symbols occupied by a DMRS port group are located in the forward symbol position, or All symbols occupied by a DMRS port group are located in the additional symbol position.

[0125] In some embodiments, symbols occupied by a DMRS port group are assigned to one or more time slots, and the number of time slots is less than or equal to a preset value. If a symbol occupied by a DMRS port group is assigned to multiple time slots, those time slots may be consecutive or discontinuous.

[0126] If the symbols occupied by the DMRS port group are assigned to multiple time slots, the above signal reception method further includes step S173, as shown in Figure 17. Steps S171 to S172 are the same as steps S161 to S162 above.

[0127] Step S173: Channel estimation is performed using the reference signals that the DMRS port groups have in some or all of the time slots among the multiple time slots.

[0128] In embodiments of the present invention, when symbols occupied by a DMRS port group are assigned to multiple time slots, the instrument performs channel estimation using the reference signals that the DMRS port group has in some or all of the time slots, thereby improving the flexibility of channel estimation.

[0129] In some embodiments, step S173 described above is specifically: If a DMRS port group is not included in one of multiple time slots, channel estimation is performed using the reference signal of the DMRS port group in the time slot preceding that time slot, or using the reference signal of the DMRS port group in the time slot following that time slot, or using the reference signals of the DMRS port groups in both the time slot preceding and following that time slot.

[0130] Taking the multiple time slots shown in Figure 15 as an example, in Figure 15, the second time slot does not contain a DMRS port group. In this case, the channel estimation for the second time slot may be completed using the reference signal of the DMRS port group in the first time slot, or using the reference signal of the DMRS port group in the third time slot, or using the reference signals of the DMRS port groups in the first and third time slots.

[0131] In some embodiments, step S173 described above is specifically: If one of multiple time slots contains a DMRS port group, channel estimation is performed using the reference signal held by the group in that time slot, or using the reference signals held by the DMRS port groups in that time slot and the time slot preceding it, or using the reference signals held by the DMRS port groups in that time slot and the time slot preceding it, or using the reference signals held by the DMRS port groups in that time slot, the time slot preceding it, and the time slot following it.

[0132] Taking the multiple time slots shown in Figure 15 as an example, in Figure 15, the first time slot contains a DMRS port group. In this case, the channel estimation for the first time slot can be completed by the reference signal held by the DMRS port group of the first time slot itself, and the channel estimation for the first time slot can be completed by the reference signals held by the DMRS port groups of the first time slot and the third time slot that follows it.

[0133] If there is a time slot prior to the first time slot in which the corresponding DMRS port group's symbol has been occupied, for example, the 0th time slot, the channel estimation for the first time slot can be completed by the reference signals held by the DMRS port group in the first time slot and the preceding 0th time slot. In embodiments of the present invention, the channel estimation for the first time slot can also be completed by the reference signals held by the DMRS port group in the preceding 0th time slot, the first time slot, and the following 3rd time slot.

[0134] In the embodiments of the present invention, only the case where there is one time slot before and one after is described as an example. There is no limit to the number of time slots before and after, and accordingly, channel estimation can be performed using the reference signals held by the DMRS port group in the two preceding time slots.

[0135] In some embodiments, the above signal receiving method is further, When the first communication partner is a base station and the second communication partner is an UE, the second communication partner receives a DCI of a preset number of bits transmitted from the first communication partner, the DCI indicates a DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group. When the second communication partner is a base station and the first communication partner is a UE, the second communication partner transmits a DCI of a preset number of bits to the first communication partner, wherein the DCI indicates a DMRS port in the DMRS port group that corresponds to a reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

[0136] Corresponding to the above signal transmission method, the embodiment of the present invention provides a signal transmission device applicable to a first communication partner. As shown in Figure 18, Determination means 181 determines the DMRS port corresponding to the reference signal that the first communication partner needs to transmit from among the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one resource element, Includes a transmitting means 182 that receives a reference signal transmitted using a DMRS port, Here, the first communication partner is the base station and the second communication partner is the UE, or the first communication partner is the UE and the second communication partner is the base station.

[0137] In the technical solution provided by the embodiment of the present invention, when transmitting a reference signal, the first communication partner transmits the reference signal to the second communication partner using the corresponding DMRS port in the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE, so that the maximum number of DMRS ports that can be supported by the CP-OFDM waveform reaches the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0138] In some examples, the number of symbols occupied by a DMRS port group is 1. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each CDM group included in a DMRS port group occupies a first preset number of resource elements using a frequency domain CDM scheme with a first preset length, and in the DMRS ports with a first preset number included in each CDM group, the value of the first preset number is the same as the value of the first preset length, and the value of the first preset number is 2 or greater.

[0139] In some embodiments, the first preset number of resource elements occupied by each CDM group are adjacent, or The resource elements of the first preset number occupied by each CDM group are not adjacent.

[0140] In some examples, the number of symbols occupied by a DMRS port group is a preset value, and the preset value is 2 or greater. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element using time-division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element in frequency division multiplexing and time division multiplexing, or Each DMRS port in a DMRS port group, excluding CDM groups, occupies one resource element using frequency division multiplexing and time division multiplexing; each CDM group in a DMRS port group occupies one resource element using frequency division multiplexing and time-domain CDM with a preset length; and each CDM group contains a preset number of DMRS ports, or Each CDM group included in a DMRS port group occupies a second preset number of resource elements using a frequency-domain CDM method with a second preset length and a time-domain CDM method with a length equal to a preset value, and each CDM group includes a second preset number of DMRS ports, with the second preset number being greater than or equal to the second preset length and less than or equal to a second preset length that is a multiple of the preset value.

[0141] In some embodiments, for a target symbol among all symbols occupied by a DMRS port group, the occupied resource elements were offset by a preset amount relative to the start position of the target symbol. The target symbol is a symbol in which there are resource elements that are not occupied by DMRS ports included in the DMRS port group.

[0142] In some embodiments, the multiple resource elements occupied by each CDM group in each symbol are adjacent to each other, or In each symbol, the multiple resource elements occupied by each CDM group are not adjacent.

[0143] In some embodiments, some symbols occupied by the DMRS port group are located in forward symbol positions, while other symbols occupied by the DMRS port group are located in additional symbol positions, or All symbols occupied by a DMRS port group are located in the forward symbol position, or All symbols occupied by a DMRS port group are located in the additional symbol position.

[0144] In some embodiments, the symbols occupied by the DMRS port group are assigned to one or more time slots. If a symbol occupied by a DMRS port group is assigned to multiple time slots, those time slots may be consecutive or discontinuous. Specifically, the determination means determines, based on the symbols occupied by the DMRS port group assigned to the current time slot, which corresponds to the reference signal that needs to be transmitted to the second communication partner among the DMRS port groups in the current time slot.

[0145] In some embodiments, the above-described signal transmitting device further includes processing means. The processing means is When the first communication partner is a base station and the second communication partner is an UE, the DCI of a preset number of bits is transmitted to the second communication partner, wherein the DCI indicates the DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group. This is used when the second communication partner is a base station and the first communication partner is an UE, and the DCI of a preset number of bits is received from the second communication partner, wherein the DCI indicates a DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

[0146] Corresponding to the above signal receiving method, as shown in Figure 19, the embodiment of the present invention provides a signal receiving device applicable to a second communication partner. As shown in Figure 19, Determination means 191 determines the DMRS port corresponding to the reference signal that the first communication partner needs to transmit from among the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one resource element, Includes a receiving means 192 for receiving a reference signal transmitted using a DMRS port, The first communication partner is a base station and the second communication partner is a user equipment (UE), or the first communication partner is an UE and the second communication partner is a base station.

[0147] In the technical solution provided by the embodiment of the present invention, when a reference signal is received, the first communication partner transmits the reference signal to the second communication partner using the corresponding DMRS port in the DMRS port group, and each DMRS port in the DMRS port group occupies an average of one RE, so that the maximum number of DMRS ports that can support a CP-OFDM waveform is equal to the number of REs contained in the OFDM symbols occupied by the DMRS port group.

[0148] In some examples, the number of symbols occupied by a DMRS port group is 1. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each CDM group included in a DMRS port group occupies a first preset number of resource elements using a frequency domain CDM scheme with a first preset length, and in the DMRS ports with a first preset number included in each CDM group, the value of the first preset number is the same as the value of the first preset length, and the value of the first preset number is 2 or greater.

[0149] In some embodiments, the first preset number of resource elements occupied by each CDM group are adjacent, or The resource elements of the first preset number occupied by each CDM group are not adjacent.

[0150] In some examples, the number of symbols occupied by a DMRS port group is a preset value, and the preset value is 2 or greater. Each DMRS port included in a DMRS port group occupies one resource element using frequency division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element using time-division multiplexing, or Each DMRS port included in a DMRS port group occupies one resource element in frequency division multiplexing and time division multiplexing, or Each DMRS port in a DMRS port group, excluding CDM groups, occupies one resource element using frequency division multiplexing and time division multiplexing; each CDM group in a DMRS port group occupies one resource element using frequency division multiplexing and time-domain CDM with a preset length; and each CDM group contains a preset number of DMRS ports, or Each CDM group included in a DMRS port group occupies a second preset number of resource elements using a frequency-domain CDM method with a second preset length and a time-domain CDM method with a length equal to a preset value, and each CDM group includes a second preset number of DMRS ports, with the second preset number being greater than or equal to the second preset length and less than or equal to a second preset length that is a multiple of the preset value.

[0151] In some embodiments, the resource elements occupied by a target symbol among all symbols occupied by a DMRS port group were offset by a preset amount relative to the start position of the target symbol. The target symbol is a symbol in which resource elements not occupied by DMRS ports included in the DMRS port group exist.

[0152] In some embodiments, the multiple resource elements occupied by each CDM group in each symbol are adjacent to each other, or In each symbol, the multiple resource elements occupied by each CDM group are not adjacent.

[0153] In some embodiments, some symbols occupied by the DMRS port group are located in forward symbol positions, while other symbols occupied by the DMRS port group are located in additional symbol positions, or All symbols occupied by a DMRS port group are located in the forward symbol position, or All symbols occupied by a DMRS port group are located in the additional symbol position.

[0154] In some embodiments, the symbols occupied by the DMRS port group are assigned to one or more time slots. If a symbol occupied by a DMRS port group is assigned to multiple time slots, those time slots may be consecutive or discontinuous. In this case, as shown in Figure 20, the above-mentioned signal receiving device further includes estimation means 193, The estimation means 193 is used to perform channel estimation using the reference signals that the DMRS port group has in some or all of the time slots when the symbols occupied by the DMRS port group are assigned to multiple time slots.

[0155] In several embodiments, the estimation means 193 specifically, If the symbols occupied by a DMRS port group are assigned to multiple time slots, and the DMRS port group is not included in one of the time slots, channel estimation is performed using the reference signal held by the DMRS port group in the time slot preceding that time slot, or using the reference signal held by the DMRS port group in the time slot following that time slot, or using the reference signals held by the DMRS port group in the time slots preceding and following that time slot. This method is used to estimate the channel when one of multiple time slots contains a DMRS port group, by using the reference signal held by the group in that time slot, or by using the reference signals held by the DMRS port groups in that time slot and the time slot preceding it, or by using the reference signals held by the DMRS port groups in that time slot and the time slot preceding it, or by using the reference signals held by the DMRS port groups in that time slot, the time slot preceding it, and the time slot following it.

[0156] In some embodiments, the above-described signal receiving device further includes processing means. The processing means is When the first communication partner is a base station and the second communication partner is an UE, the first communication partner receives a DCI of a preset number of bits, the DCI indicates a DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group. This is used when the second communication partner is a base station and the first communication partner is an UE, and a DCI with a preset number of bits is transmitted to the first communication partner, wherein the DCI indicates the DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

[0157] Embodiments of the present invention provide an electronic device, which, as shown in Figure 21, includes a processor 211 and a machine-readable storage medium 212, the machine-readable storage medium 212 storing machine-executable instructions that can be executed by the processor 211, and the machine-executable instructions cause the processor 211 to perform the steps described in any of the embodiments shown in Figures 3 to 17 above.

[0158] In the embodiments of the present invention, the electronic devices, such as the first and second communication partners described above, may be base stations or UEs.

[0159] The communication bus mentioned in the above-mentioned electronic devices may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus may be an address bus, data bus, control bus, etc. For convenience, it is shown as a thick line in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0160] The communication interface is used for communication between the above-mentioned electronic devices and other devices.

[0161] The memory may include random access memory (RAM), non-volatile memory (NVM), and, for example, at least one disk memory. Optionally, the memory may be a storage device located away from at least one of the aforementioned processors.

[0162] The above-mentioned processors may be general-purpose processors, including Central Processing Units (CPUs), Network Processors (NPs), etc. They may also be Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, or discrete hardware assemblies.

[0163] Another embodiment provided by the present invention provides a computer-readable storage medium in which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any of the embodiments of Figures 3 to 16 above are realized.

[0164] Another embodiment provided by the present invention provides a computer program which, when executed by a processor, implements the steps described in any of the embodiments shown in Figures 3 to 17 above.

[0165] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments are implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded into a computer and executed, all or part of them implement the flow or function described in the embodiments of the present invention. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, radio, microwave, etc.) method. The computer-readable storage medium may be any available medium accessible to the computer, or it may be a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid state drives (SSDs)).

[0166] In this specification, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another, and do not necessarily require or imply that such an actual relationship or order exists between these entities or actions. Furthermore, "includes," "equips," or any other variation means non-exclusive inclusion, and therefore, a process, method, article, or equipment containing a set of elements includes not only those elements but also other elements not explicitly listed, or elements specific to such a process, method, article, or equipment. Unless otherwise specified, an element limited by the term "includes one..." does not preclude the presence of other identical elements in a process, method, article, or equipment containing the aforementioned element.

[0167] Each embodiment in this specification is described in relation to the others, and common parts between embodiments should be referenced from one another. Each embodiment is described primarily in terms of its differences from the others. In particular, embodiments of apparatus, electronic equipment, storage media, and computer programs are basically similar to embodiments of the method and are therefore described briefly, but for relevant points, refer to the partial description of the embodiments of the method.

[0168] The above description represents preferred embodiments of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are also included within the scope of protection of the present invention.

Claims

1. A signal transmission method applicable to a first communication partner, To determine which DMRS port corresponds to the reference signal that needs to be transmitted to the second communication partner from the demodulation reference signal DMRS port group, This includes transmitting the reference signal using the DMRS port, The first communication partner is a base station and the second communication partner is a user device UE, or the first communication partner is a UE and the second communication partner is a base station, The number of symbols occupied by the DMRS port group is a preset value, and the preset value is 2 or more. Each DMRS port included in the aforementioned DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, or A signal transmission method characterized in that each DMRS port other than the code division multiplexing CDM group included in the DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, each CDM group included in the DMRS port group occupies a number of resource elements equal to the preset value using frequency division multiplexing and time-domain CDM with a length equal to the preset value, and each CDM group includes a number of DMRS ports equal to the preset value.

2. The signal transmission method according to claim 1, characterized in that, in a target symbol among all symbols occupied by the DMRS port group, the occupied resource element is offset by a preset amount relative to the starting position of the target symbol, and the target symbol is a symbol in which there are resource elements that are not occupied by the DMRS ports included in the DMRS port group.

3. In each symbol, the multiple resource elements occupied by each CDM group are adjacent to each other, or The signal transmission method according to claim 1, characterized in that the multiple resource elements occupied by each CDM group in each symbol are not adjacent to each other.

4. Some of the symbols occupied by the DMRS port group are located in forward symbol positions, and other parts of the symbols occupied by the DMRS port group are located in additional symbol positions, or All symbols occupied by the aforementioned DMRS port group are located in the forward symbol position, or The signal transmission method according to any one of claims 1 to 3, characterized in that all symbols occupied by the DMRS port group are located at additional symbol positions.

5. The symbols occupied by the aforementioned DMRS port group are assigned to one or more time slots. If the symbols occupied by the DMRS port group are assigned to multiple time slots, these multiple time slots may be consecutive or discontinuous. Determining which DMRS port corresponds to the reference signal that needs to be transmitted to the second communication partner from the aforementioned demodulation reference signal DMRS port group is: A signal transmission method according to any one of claims 1 to 3, characterized in that it includes determining the DMRS port in the DMRS port group in the current time slot that corresponds to the reference signal that needs to be transmitted to the second communication partner, based on the symbols occupied by the DMRS port group assigned to the current time slot.

6. When the first communication partner is a base station and the second communication partner is a UE, the first communication partner transmits downlink control information DCI of a preset number of bits to the second communication partner, wherein the DCI indicates a DMRS port in the DMRS port group that corresponds to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group. The signal transmission method according to any one of claims 1 to 3, further comprising: when the second communication partner is a base station and the first communication partner is a UE, receiving downlink control information DCI of a preset number of bits transmitted from the second communication partner, wherein the DCI indicates a DMRS port in the DMRS port group corresponding to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

7. A signal reception method applicable to a second communication partner, To determine the DMRS port corresponding to the reference signal that the first communication partner needs to transmit from the demodulation reference signal DMRS port group, This includes receiving the reference signal transmitted using the DMRS port, The first communication partner is a base station and the second communication partner is a user device UE, or the first communication partner is a UE and the second communication partner is a base station, The number of symbols occupied by the DMRS port group is a preset value, and the preset value is 2 or more. Each DMRS port included in the aforementioned DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, or A signal receiving method characterized in that each DMRS port other than the code division multiplexing CDM group included in the DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, each CDM group included in the DMRS port group occupies a number of resource elements equal to the preset value using frequency division multiplexing and time-domain CDM with a length equal to the preset value, and each CDM group includes a number of DMRS ports equal to the preset value.

8. The signal receiving method according to claim 7, characterized in that, in a target symbol among all symbols occupied by the DMRS port group, the occupied resource element is offset by a preset amount relative to the starting position of the target symbol, and the target symbol is a symbol in which there are resource elements that are not occupied by the DMRS ports included in the DMRS port group.

9. In each symbol, the multiple resource elements occupied by each CDM group are adjacent to each other, or The signal receiving method according to claim 7, characterized in that the multiple resource elements occupied by each CDM group in each symbol are not adjacent to each other.

10. The symbols occupied by the aforementioned DMRS port group are assigned to one or more time slots. If the symbols occupied by the DMRS port group are assigned to multiple time slots, these multiple time slots may be consecutive or discontinuous. If the symbols occupied by the DMRS port group are assigned to multiple time slots, channel estimation is performed using the reference signals that the DMRS port group has in some or all of the multiple time slots, further including, Performing channel estimation using the reference signal possessed by the DMRS port group in some or all of the aforementioned time slots is: If one of the multiple time slots does not contain the DMRS port group, channel estimation is performed using the reference signal held by the DMRS port group in the time slot preceding the time slot, or using the reference signal held by the DMRS port group in the time slot following the time slot, or using the reference signal held by the DMRS port group in the time slot preceding and following the time slot. A signal receiving method according to any one of claims 7 to 9, characterized in that, if one of the plurality of time slots contains the DMRS port group, channel estimation is performed using the reference signal held by the DMRS port group in that time slot, or channel estimation is performed using the reference signal held by the DMRS port group in that time slot and the time slot preceding that time slot, or channel estimation is performed using the reference signal held by the DMRS port group in that time slot and the time slot preceding that time slot, or channel estimation is performed using the reference signal held by the DMRS port group in that time slot, the time slot preceding that time slot and the time slot following that time slot.

11. When the first communication partner is a base station and the second communication partner is a UE, the first communication partner receives downlink control information DCI of a preset number of bits transmitted from the first communication partner, wherein the DCI indicates a DMRS port in the DMRS port group corresponding to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group. A signal receiving method according to any one of claims 7 to 9, further comprising transmitting a preset number of bits of downlink control information DCI to the first communication partner when the second communication partner is a base station and the first communication partner is a UE, wherein the DCI indicates a DMRS port in the DMRS port group corresponding to the reference signal, and the maximum value corresponding to the preset number of bits is greater than or equal to the maximum number of DMRS ports included in the DMRS port group.

12. A signal transmitting device applicable to the first communication partner, A means for determining which DMRS port corresponds to the reference signal that needs to be transmitted to the second communication partner from among the demodulation reference signal DMRS port group, The system includes a transmitting means for transmitting the reference signal using the DMRS port, The first communication partner is a base station and the second communication partner is a user device UE, or the first communication partner is a UE and the second communication partner is a base station, The number of symbols occupied by the DMRS port group is a preset value, and the preset value is 2 or more. Each DMRS port included in the aforementioned DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, or A signal transmission device characterized in that each DMRS port in the DMRS port group, other than the code division multiplexing CDM group, occupies one resource element using frequency division multiplexing and time division multiplexing, each CDM group in the DMRS port group occupies a number of resource elements equal to the preset value using frequency division multiplexing and time-domain CDM with a length equal to the preset value, and each CDM group includes a number of DMRS ports equal to the preset value.

13. A signal receiving device applicable to a second communication partner, A determination means for determining the DMRS port corresponding to the reference signal that the first communication partner needs to transmit, among the demodulation reference signal DMRS port group, The system includes receiving means for receiving the reference signal transmitted using the DMRS port, The first communication partner is a base station and the second communication partner is a user device UE, or the first communication partner is a UE and the second communication partner is a base station, The number of symbols occupied by the DMRS port group is a preset value, and the preset value is 2 or more. Each DMRS port included in the aforementioned DMRS port group occupies one resource element using frequency division multiplexing and time division multiplexing, or A signal receiving device characterized in that each DMRS port in the DMRS port group, other than the code division multiplexing CDM group, occupies one resource element using frequency division multiplexing and time division multiplexing, each CDM group in the DMRS port group occupies a number of resource elements equal to the preset value using frequency division multiplexing and time-domain CDM with a length equal to the preset value, and each CDM group includes a number of DMRS ports equal to the preset value.

14. Electronic device comprising a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions that can be executed by the processor, and the machine-executable instructions cause the processor to implement a step of a signal transmission method according to any one of claims 1 to 3, or a step of a signal reception method according to any one of claims 7 to 9.

15. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, it realizes the steps of the signal transmission method described in any one of claims 1 to 3, or the steps of the signal reception method described in any one of claims 7 to 9.

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