Reference signal configuration information indication method, base station and terminal

Abstract

This invention provides a method for indicating reference signal configuration information, a base station, and a terminal. The method includes: a first communication node determining joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information, and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information, and demodulation reference signal configuration information; and the first communication node sending the joint signaling to a second communication node. By employing the above technical solution, the problem of additional physical layer overhead caused by notifying users of reference signal information in related technologies is solved. While ensuring accurate notification of reference signal information to user terminals, the use of joint signaling reduces physical layer overhead.

Description

[0001] This application is a divisional application of Chinese patent application No. 201710677499.3, filed on August 9, 2017, entitled “Method for indicating reference signal configuration information, base station and terminal”. Technical Field

[0002] This invention relates to the field of communications, and more specifically, to a method for indicating reference signal configuration information, a base station, and a terminal. Background Technology

[0003] In related technologies, phase noise tracking reference signals (PTRS) are currently needed at high frequencies to estimate phase noise. Generally, since a single antenna panel of a TRP uses a single crystal oscillator, multiple DMRS ports emitted by that antenna panel can share a single PTRS port. That is, the estimation result of this PTRS port can be used for multiple DMRS ports emitted by the same antenna panel. If multiple panels of a TRP share a single crystal oscillator, then all DMRS ports emitted by that TRP can share a single PTRS port. However, the number of PTRS ports and how to notify users of the number of PTRS ports are currently undetermined. Semi-static notification of the number of PTRS ports lacks flexibility, while flexible notification via DCI requires physical layer signaling overhead. Furthermore, there is no consensus on how to configure the type and number of symbols of the pre-reference signal. Semi-static configuration using higher-layer signaling presents problems in multi-cell transmission, while flexible notification via DCI requires physical layer signaling overhead.

[0004] Currently, the physical layer technology for New Radio (NR) is under intense discussion within the 3rd Generation Partnership Project (3GPP) RAN1. Flexibility and efficiency have always been goals pursued in NR physical layer design. Maximizing the flexibility of the physical layer reference signal also seems to be a trend. This is because the demodulation reference signal requirements may differ across application scenarios. Furthermore, NR supports high-frequency data transmission, so multi-antenna beamforming technology must be introduced to address the significant path loss and other losses at high-density frequencies, such as rain attenuation and fading caused by vegetation absorption. High-frequency beamforming technology can be categorized into digital beamforming, analog beamforming, and hybrid digital and analog beamforming. Since digital beamforming technology requires the transmitter to have a good understanding of the channel state, i.e., know the channel information for each antenna port, the huge overhead of the reference signal becomes a challenge. Therefore, analog beamforming has received widespread attention. Beamforming methods can be implemented at both the transmitter and receiver. For example, a base station can use different transmit beams to send data to users, and users can use different receive beams to receive data.

[0005] In LTE, the QCL parameter set mainly includes average gain, delay spread, Doppler spread, Doppler shift, and average delay parameters. During multi-TRP (Transmission Receiver Point) transmission, the base station needs to indicate to the user the reference signal for the demodulation reference signal (DMRS) QCL and the PDSCH mapping parameters. This allows the user to use the configured reference signal's QCL parameters for demodulation.

[0006] In LTE, base stations configure PQI (Personal Quality Indicator) via higher-layer signaling, similar to the information indications in Table 7.1.9-1 of LTE standard 36.213. As described in 36.213, typically, base stations use higher-layer signaling to configure multiple sets (e.g., four sets) of parameters to indicate PDSCH RE Mapping and Quasi-Co-Location Indicator. Then, as described in 36.212, for example in DCI format 2D, the base station uses a few bits of signaling to indicate which higher-layer configuration was used, for example, 2 bits. In the case of DPS scheduling, the multiple sets of PQI parameters configured by the higher layers may correspond to different TRP transmissions.

[0007] Because different receiving beams produce different demodulation results at high frequencies, the base station needs to instruct the user which receiving beam to use. In other words, the base station uses the QCL parameter to indicate a previously transmitted reference signal to the user for beam indication. That is, when receiving data or DMRS, the user uses the receiving beam of the reference signal indicated by the base station. Since this reference signal has been transmitted before and is often periodically for beam management, the user already knows the best receiving beam to use for receiving this reference signal.

[0008] Therefore, in NR, the QCL parameter set will include an additional parameter: spatial Rx parameters, used for beam indication. Thus, the QCL parameter set in NR includes average gain, delay spread, Doppler spread, Doppler shift, average delay parameters, and spatial Rx parameters.

[0009] Similar to LTE, NR also supports multi-TRP transmission, or CoMP (coordinated multiple points transmission / reception). CoMP technology includes various transmission schemes, such as DPS (dynamical point selection) and joint transmission (JT). Since some or all of the QCL parameters of different TRPs or transmit beams may be different, during JT, if different DMRS ports come from different TRPs, then the QCL parameters of these DMRS ports will be different.

[0010] Furthermore, at high frequencies, a phase noise tracking reference signal (PTRS) may be needed to estimate phase noise. This is because at high frequencies, the presence of phase noise significantly reduces the time-domain estimation accuracy of the demodulation reference signal, thereby reducing system transmission efficiency. Generally, since a single antenna panel of a TRP uses a single crystal oscillator, multiple DMRS ports emitted by that antenna panel can share a single PTRS port; that is, the estimation result of that PTRS port can be used for multiple DMRS ports emitted by the same antenna panel. If multiple panels of a TRP share a single crystal oscillator, then all DMRS ports emitted by that TRP can share a single PTRS port. However, the exact number of PTRS ports and how to notify users of the PTRS port count are currently undetermined.

[0011] There is currently no effective solution to the problem of additional physical layer overhead caused by notifying users of reference signal information in related technologies. Summary of the Invention

[0012] This invention provides a method for indicating reference signal configuration information, a base station, and a terminal, to at least solve the problem in related technologies where notifying users of reference signal information results in additional physical layer overhead.

[0013] According to an embodiment of the present invention, a method for indicating reference signal information is provided, comprising: determining joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and transmitting the joint signaling, wherein the joint signaling is used to indicate the reference signal configuration information.

[0014] Optionally, the configuration information of the demodulation reference signal includes at least one of the following: the number of symbols of the demodulation reference signal, the type of the demodulation reference signal, the code block type of the demodulation reference signal, the port order of the demodulation reference signal, and the port mapping information of the demodulation reference signal.

[0015] Optionally, the quasi-co-location configuration information includes one or more subsets of quasi-co-location parameters, and the ports of the demodulation reference signal are divided into one or more port groups of demodulation reference signal type 1, wherein each subset of quasi-co-location parameters corresponds to one port group of demodulation reference signal type 1.

[0016] Optionally, the method further includes configuring at least one of the following information via higher-layer signaling: the maximum number of quasi-co-location parameter subsets; the maximum number of port groups for demodulation reference signal type 1.

[0017] Optionally, the configuration information of the phase tracking reference signal includes at least one of the following: the number of ports of the phase tracking reference signal, the port ID of the phase tracking reference signal, and the maximum number of ports of the phase tracking reference signal.

[0018] Optionally, if the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, the first communication node sends the joint signaling to the second communication node, including: the joint signaling includes a subset of quasi-co-location parameters and a port ID of a phase tracking reference signal corresponding to each subset of quasi-co-location parameters.

[0019] Optionally, the maximum number of ports of the phase tracking reference signal is equal to the maximum number of subsets of quasi-co-location parameters.

[0020] Optionally, the joint signaling is further used to indicate whether port groups of demodulation reference signal type 1 share a phase tracking reference signal, or whether the port groups are quasi-co-located with respect to partial quasi-co-location parameters; wherein, in the case that two port groups of demodulation reference signal type 1 are quasi-co-located with respect to quasi-co-location parameters, the two port groups of demodulation reference signal type 1 share a phase tracking reference signal; wherein, the partial quasi-co-location parameters include: Doppler spread and Doppler offset. Optionally, one phase tracking reference signal corresponds to one port group of demodulation reference signal type 2, wherein one port group of demodulation reference signal type 2 includes one or more port groups of demodulation reference signal type 1.

[0021] Optionally, the communication node sending the joint signaling determines the demodulation reference signal code packet type by the number of quasi-co-location parameter subsets; all quasi-co-location parameters of all demodulation reference signal ports within each code packet are the same, and the quasi-co-location parameters of demodulation reference signal ports in different code packets are the same or different; the demodulation reference signal DMRS ports contained in a code packet of code packet type 1 use the same code in the time domain but different codes in the frequency domain; a code packet of code packet type 2 contains two code packets of code packet type 1, and the demodulation reference signal ports contained in these two code packets of code packet type 1 occupy the same time-frequency resources, but the time domain codes are different.

[0022] Optionally, the communication nodes of the two communicating parties agree that the configuration information indication bits of multiple demodulation reference signals include the same demodulation reference signal port, and the demodulation reference signal ports indicated by the multiple indication bits are in different orders, wherein the demodulation reference signal ports in different orders correspond to different quasi-co-location parameters.

[0023] Optionally, if it is determined that there are two quasi-co-location parameter subsets and six demodulation reference signal ports are configured and mapped only to the time domain symbol of one demodulation reference signal, all demodulation reference signal ports of the communication node sending the joint signaling use the first quasi-co-location parameter subset of the two quasi-co-location parameter subsets and do not use the second quasi-co-location parameter subset.

[0024] Optionally, the first communication node notifies at least one of the following information via the joint signaling: configuration information of the transmission beam, configuration information of the phase tracking reference signal.

[0025] Optionally, the configuration information of the transmit beam includes at least one of the following: resource information indication of the probe reference signal, and transmission precoding matrix indication.

[0026] Optionally, the resource information of the probe reference signal includes the port information of the phase tracking reference signal.

[0027] Optionally, one or more of the probe reference signal resources form a probe reference signal resource set, and each probe reference signal resource set corresponds to the same phase tracking reference signal port information.

[0028] According to another embodiment of the present invention, a method for indicating reference signal information is provided, comprising: receiving joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and transmitting data with a communication node that sends the joint signaling according to the joint signaling, wherein the joint signaling is used to indicate the reference signal configuration information.

[0029] Optionally, the configuration information of the demodulation reference signal includes at least one of the following: the number of symbols of the demodulation reference signal, the type of the demodulation reference signal, the code block type of the demodulation reference signal, the port order of the demodulation reference signal, and the port mapping information of the demodulation reference signal.

[0030] Optionally, the quasi-co-location configuration information includes one or more subsets of quasi-co-location parameters, and the ports of the demodulation reference signal are divided into one or more port groups of demodulation reference signal type 1, wherein each subset of quasi-co-location parameters corresponds to one port group of demodulation reference signal type 1.

[0031] Optionally, receive at least one of the following information configured via higher-level signaling: the maximum number of subsets of quasi-co-location parameters; the maximum number of port groups of demodulation reference signal type 1.

[0032] Optionally, the configuration information of the phase tracking reference signal includes at least one of the following: the number of ports of the phase tracking reference signal, the port ID of the phase tracking reference signal, and the maximum number of ports of the phase tracking reference signal.

[0033] Optionally, if the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, the second communication node receives joint signaling sent by the first communication, including: the joint signaling includes a subset of quasi-co-location parameters and a port ID of a phase tracking reference signal corresponding to each subset of quasi-co-location parameters.

[0034] Optionally, the maximum number of ports of the phase tracking reference signal is equal to the maximum number of subsets of quasi-co-location parameters.

[0035] Optionally, the following information is received from the joint signaling notification: whether the port groups of demodulation reference signal type 1 share a phase tracking reference signal, or whether the port groups are quasi-co-located with respect to partial quasi-co-location parameters; wherein, in the case that two port groups of demodulation reference signal type 1 are quasi-co-located with respect to partial quasi-co-location parameters, the two port groups of demodulation reference signal type 1 share a phase tracking reference signal; wherein, the partial quasi-co-location parameters include: Doppler spread and Doppler offset.

[0036] Optionally, a phase tracking reference signal corresponds to a demodulation reference signal type 2 port group, wherein a demodulation reference signal type 2 port group includes one or more demodulation reference signal type 1 port groups.

[0037] Optionally, the demodulation reference signal code group type is determined by the number of quasi-co-location parameter subsets of the communication node sending the joint signaling; all quasi-co-location parameters of all demodulation reference signal ports within each code group are the same, and the quasi-co-location parameters of demodulation reference signal ports in different code groups are the same or different;

[0038] A code packet of type 1 contains DMRS ports that use the same code in the time domain but different codes in the frequency domain; a code packet of type 2 contains two code packets of type 1, and the demodulation reference signal ports contained in these two code packets of type 1 occupy the same time and frequency resources, but have different time domain codes.

[0039] Optionally, the communication nodes of both parties agree that the information indication bits of multiple demodulation reference signals include the same demodulation reference signal port, and the demodulation reference signal ports indicated by the multiple indication bits are in different orders, wherein the demodulation reference signal ports in different orders correspond to different quasi-co-location parameters.

[0040] Optionally, if the communication node receiving the joint signaling is configured with two quasi-co-location parameter subsets and has configured 6 DMRS ports that are mapped only to the time domain symbol of a demodulation reference signal, the communication nodes of both parties agree that all demodulation reference signal ports use the first quasi-co-location parameter subset of the two quasi-co-location parameter subsets and do not use the second quasi-co-location parameter subset.

[0041] Optionally, at least one of the following information may be received via the joint signaling: configuration information of the transmit beam and configuration information of the phase tracking reference signal.

[0042] Optionally, the configuration information of the transmit beam includes at least one of the following: resource information indication of the probe reference signal, and transmission precoding matrix indication.

[0043] Optionally, the resource information of the probe reference signal includes the port information of the phase tracking reference signal.

[0044] Optionally, one or more of the probe reference signal resources form a probe reference signal resource set, and each probe reference signal resource set corresponds to the same phase tracking reference signal port information.

[0045] According to another embodiment of the present invention, a base station is provided, comprising: a first processor, configured to determine joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and a first communication device, configured to transmit the joint signaling to a second communication node.

[0046] According to another embodiment of the present invention, a terminal is provided, comprising: a second communication device for receiving joint signaling transmitted by a first communication node, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and a second processor for receiving data transmitted by the first communication node according to the joint signaling, and / or transmitting data with the first communication node.

[0047] According to another embodiment of the present invention, a reference signal information indicating device is provided, applied to a first communication node, comprising: a determining module for determining joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and a transmitting module for transmitting the joint signaling to a second communication node.

[0048] According to another embodiment of the present invention, a reference signal information indicating device is provided, applied to a second communication node, comprising: a receiving module, configured to receive joint signaling transmitted by a first communication node, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information; and a transmission module, configured to receive data transmitted by the first communication node according to the joint signaling, and / or perform data transmission with the first communication node.

[0049] According to another embodiment of the present invention, a storage medium is provided, the storage medium including a stored program, wherein the program, when executed, performs the method described in any of the above optional embodiments.

[0050] According to another embodiment of the present invention, a processor is provided for running a program, wherein the program, when running, performs the method described in any of the above optional embodiments.

[0051] Through this invention, a first communication node determines joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information, transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information, demodulation reference signal configuration information; the first communication node sends the joint signaling to a second communication node. By adopting the above technical solution, the problem of additional physical layer overhead caused by notifying users of reference signal information in related technologies is solved. While ensuring accurate notification of reference signal information to user terminals, the use of joint signaling reduces physical layer overhead. Attached Figure Description

[0052] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0053] Figure 1 This is a hardware structure block diagram of a mobile terminal for a reference signal information indication method according to an embodiment of the present invention.

[0054] Figure 2 This is a flowchart of a method for indicating reference signal information according to an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of demodulation reference signal type 2 according to preferred embodiment 1. Figure 1 ;

[0056] Figure 4 This is a schematic diagram of demodulation reference signal type 2 according to preferred embodiment 1. Figure 2 ;

[0057] Figure 5 This is a schematic diagram of multiple DMRS port groups sharing the same crystal oscillator according to preferred embodiment 1;

[0058] Figure 6 This is a schematic diagram of demodulation reference signal type 1 according to preferred embodiment 1a. Figure 1 ;

[0059] Figure 7 This is a schematic diagram of demodulation reference signal type 1 according to preferred embodiment 1a. Figure 2 ;

[0060] Figure 8 This is a schematic diagram of multi-point dynamic switching transmission according to preferred embodiment 2;

[0061] Figure 9 This is a hardware structure diagram of a base station according to an embodiment of the present invention;

[0062] Figure 10 This is a hardware structure diagram of a terminal according to an embodiment of the present invention. Detailed Implementation

[0063] This application provides a mobile communication network (including but not limited to a 5G mobile communication network), whose network architecture may include network-side devices (e.g., base stations) and terminals. This application also provides an information transmission method that can operate on the aforementioned network architecture. It should be noted that the operating environment of the information transmission method provided in this application is not limited to the aforementioned network architecture. Furthermore, in this application, the first communication node can be a network-side device such as a base station, and the second communication node can be a terminal. However, other possibilities are not excluded; for example, the first communication node generally refers to a user, and the second communication node generally also refers to a user, which can be applied to device-to-device (D2D) communication.

[0064] Example 1

[0065] The method embodiment provided in Embodiment 1 of this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking its operation on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a reference signal information indication method according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal 10 may include one or more (only one is shown in the figure) processors 102 (processors 102 may include, but are not limited to, microprocessors MCUs or programmable logic devices FPGAs), a memory 104 for storing data, and a communication device 106 for communication functions. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, the mobile terminal 10 may also include... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0066] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / modules corresponding to the reference signal information indication method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0067] The communication device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the mobile terminal 10. In one example, the communication device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device 106 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0068] This embodiment provides a method for indicating reference signal information operating on the above-described network architecture. Figure 2 This is a flowchart of a method for indicating reference signal information according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0069] Step S202, the first communication node determines joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information, transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information, demodulation reference signal configuration information;

[0070] In step S204, the first communication node sends the joint signaling to the second communication node.

[0071] Through the above steps, the first communication node determines the joint signaling, which includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information, transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information, demodulation reference signal configuration information; the first communication node sends the joint signaling to the second communication node. By adopting the above technical solution, the problem of additional physical layer overhead caused by notifying users of reference signal information in related technologies is solved. While ensuring accurate notification of reference signal information to user terminals, the use of joint signaling reduces physical layer overhead.

[0072] Optionally, the entity performing the above steps may be a base station, but is not limited to this.

[0073] Optionally, the configuration information of the demodulation reference signal includes at least one of the following: the number of symbols of the demodulation reference signal, the type of the demodulation reference signal, the code block type of the demodulation reference signal, the port order of the demodulation reference signal, and the port mapping information of the demodulation reference signal.

[0074] Optionally, the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, and the ports of the demodulation reference signal are divided into one or more port groups of demodulation reference signal type 1, wherein each subset of the quasi-co-location parameters corresponds to one port group of demodulation reference signal type 1.

[0075] Optionally, the first communication node may also configure at least one of the following information for the second communication node via higher-layer signaling: the maximum number of quasi-co-location parameter subsets; the maximum number of port groups of demodulation reference signal type 1.

[0076] Optionally, the configuration information of the phase tracking reference signal includes at least one of the following: the number of ports of the phase tracking reference signal, the port ID of the phase tracking reference signal, and the maximum number of ports of the phase tracking reference signal.

[0077] Optionally, if the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, the first communication node sends the joint signaling to the second communication node, including: the joint signaling includes a subset of quasi-co-location parameters and a port ID of a phase tracking reference signal corresponding to each subset of quasi-co-location parameters.

[0078] Optionally, the maximum number of ports for the phase tracking reference signal is equal to the maximum number of subsets of quasi-co-location parameters.

[0079] Optionally, the first communication node notifies the following information via the joint signaling: whether the port groups of demodulation reference signal type 1 share a phase tracking reference signal, or whether the port groups are quasi-co-located with respect to QCL parameters; wherein, in the case of two port groups of demodulation reference signal type 1 being quasi-co-located with respect to QCL parameters, the two port groups of demodulation reference signal type 1 share a phase tracking reference signal; wherein, the QCL parameters include: Doppler spread and Doppler offset.

[0080] Optionally, a phase tracking reference signal corresponds to a port group of demodulation reference signal type 2, wherein a port group of demodulation reference signal type 2 includes one or more port groups of demodulation reference signal type 1.

[0081] Optionally, the first communication node determines the demodulation reference signal code group type by the number of quasi-co-location parameter subsets; all QCL parameters of all demodulation reference signal ports within each code group are the same, and the QCL parameters of demodulation reference signal ports in different code groups are the same or different; the DMRS ports contained in a code group of code group type 1 use the same code in the time domain but different codes in the frequency domain; a code group of code group type 2 contains two code groups of code group type 1, and the demodulation reference signal ports contained in these two code groups of code group type 1 occupy the same time-frequency resources, and the time-domain OCC codes are different.

[0082] Optionally, the first communication node and the second communication node agree that the information indication bits of the multiple demodulation reference signals include the same demodulation reference signal port, and the demodulation reference signal ports indicated by the multiple indication bits are in different orders, wherein the demodulation reference signal ports in different orders correspond to different QCL parameters.

[0083] Optionally, if the first communication node determines that the second communication node is configured with two quasi-co-location parameter subsets, and the second communication node is configured with 6 DMRS ports that are mapped only to the time domain symbol of a demodulation reference signal, then all demodulation reference signal ports of the first communication node shall use the first quasi-co-location parameter subset of the two quasi-co-location parameter subsets and not use the second quasi-co-location parameter subset.

[0084] Optionally, the first communication node may notify at least one of the following information via the joint signaling: configuration information of the transmit beam and configuration information of the phase tracking reference signal.

[0085] Optionally, the configuration information of the transmit beam includes at least one of the following: a resource information indication for the probe reference signal, and a transmission precoding matrix indication. It should be noted that the resource information indication for the probe reference signal is an identifier of the resource information, that is, it identifies which probe reference signal's resource information is being configured, similar to an index.

[0086] Optionally, the resource information of the probe reference signal includes port information of the phase tracking reference signal.

[0087] Optionally, the resources of one or more probe reference signals form a probe reference signal resource set, and each probe reference signal resource set corresponds to the port information of the same phase tracking reference signal.

[0088] According to another embodiment of the present invention, a method for indicating reference signal information is provided, the method being applied to a second communication node, the method comprising the following steps:

[0089] Step 1: The second communication node receives the joint signaling sent by the first communication node, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information and transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information;

[0090] Step two, the second communication node receives data transmitted by the first communication node according to the joint signaling, and / or transmits data with the first communication node.

[0091] Optionally, the configuration information of the demodulation reference signal includes at least one of the following: the number of symbols of the demodulation reference signal, the type of the demodulation reference signal, the code block type of the demodulation reference signal, the port order of the demodulation reference signal, and the port mapping information of the demodulation reference signal.

[0092] Optionally, the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, and the ports of the demodulation reference signal are divided into one or more port groups of demodulation reference signal type 1, wherein each subset of the quasi-co-location parameters corresponds to one port group of demodulation reference signal type 1.

[0093] Optionally, the second communication node receives at least one of the following information configured by the first communication node via higher-layer signaling: the maximum number of quasi-co-location parameter subsets; the maximum number of port groups of demodulation reference signal type 1.

[0094] Optionally, the configuration information of the phase tracking reference signal includes at least one of the following: the number of ports of the phase tracking reference signal, the port ID of the phase tracking reference signal, and the maximum number of ports of the phase tracking reference signal.

[0095] Optionally, if the configuration information of the quasi-co-location includes one or more subsets of quasi-co-location parameters, the second communication node receives joint signaling sent by the first communication, including: the joint signaling includes a subset of quasi-co-location parameters and a port ID of a phase tracking reference signal corresponding to each subset of quasi-co-location parameters.

[0096] Optionally, the maximum number of ports for the phase tracking reference signal is equal to the maximum number of subsets of quasi-co-location parameters.

[0097] Optionally, the second communication node receives the following information from the joint signaling notification: whether the port groups of demodulation reference signal type 1 share a phase tracking reference signal, or whether the port groups are quasi-co-located with respect to QCL parameters; wherein, in the case of two port groups of demodulation reference signal type 1 being quasi-co-located with respect to QCL parameters, the two port groups of demodulation reference signal type 1 share a phase tracking reference signal; wherein, the QCL parameters include: Doppler spread and Doppler offset.

[0098] Optionally, a phase tracking reference signal corresponds to a port group of demodulation reference signal type 2, wherein a port group of demodulation reference signal type 2 includes one or more port groups of demodulation reference signal type 1.

[0099] Optionally, the demodulation reference signal code group type is determined by the first communication node through the number of quasi-co-location parameter subsets; all QCL parameters of all demodulation reference signal ports within each code group are the same, and the QCL parameters of demodulation reference signal ports in different code groups are the same or different; the DMRS ports contained in a code group of code group type 1 use the same code in the time domain but different codes in the frequency domain; a code group of code group type 2 contains two code groups of code group type 1, and the demodulation reference signal ports contained in these two code groups of code group type 1 occupy the same time-frequency resources, and the time-domain OCC codes are different.

[0100] Optionally, the second communication node and the first communication node agree that multiple information indication bits of the demodulation reference signal include the same demodulation reference signal port, and the demodulation reference signal ports indicated by the multiple indication bits are in different orders, wherein the demodulation reference signal ports in different orders correspond to different QCL parameters.

[0101] Optionally, if the second communication node is configured with two quasi-co-location parameter subsets and has 6 DMRS ports mapped only to the time-domain symbol of a demodulation reference signal, the second communication node and the first communication node agree that all demodulation reference signal ports use the first quasi-co-location parameter subset of the two quasi-co-location parameter subsets and do not use the second quasi-co-location parameter subset.

[0102] Optionally, the second communication node receives at least one of the following information via the joint signaling: configuration information of the transmit beam and configuration information of the phase tracking reference signal.

[0103] Optionally, the configuration information of the transmit beam includes at least one of the following: resource information indication of the probe reference signal, and transmission precoding matrix indication.

[0104] Optionally, the resource information of the probe reference signal includes port information of the phase tracking reference signal.

[0105] Optionally, the resources of one or more probe reference signals form a probe reference signal resource set, and each probe reference signal resource set corresponds to the port information of the same phase tracking reference signal.

[0106] The following is a detailed description with reference to preferred embodiments of the present invention:

[0107] Preferred Example 1: DMRS Type 2

[0108] Currently, for reference signal design, one DMRS pattern based on FD-OCC (Frequency Domain Orthogonal Covering Code), which we call DMRS Type 2, can effectively support a maximum of 6 ports in a single DMRS symbol (e.g., Figure 3 As shown), it supports a maximum of 12 ports with 2 DMRS symbols (e.g. Figure 4 (As shown).

[0109] Figure 3 This is a schematic diagram of demodulation reference signal type 2 according to preferred embodiment 1. Figure 1 ,like Figure 3As shown, in a resource block (RB), the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The six DMRS ports are divided into three code domain multiplexing (CDM) groups. CDM group #0 contains ports p0 and p1. In CDM group #0, ports p0 and p1 are mapped to the same time-frequency resources using OCC code division. For example, port p0 uses the OCC code [1 1], and port p1 uses the OCC code [1 -1]. In one RB, the subcarriers mapped to ports p0 and p1 include subcarriers #4, #5; #10, and #11. Similarly, CDM group #1 contains ports p2 and p3. In CDM group #1, ports p2 and p3 are mapped to the same time-frequency resources using OCC code division. For example, port p1 uses the OCC code [1 1], and port p3 uses the OCC code [1 -1]. CDM group #2 contains ports p4 and p5. In CDM group #2, ports p4 and p5 are mapped to the same time-frequency resources using OCC codes. For example, port p4 uses the OCC code [1 1], and port p5 uses the OCC code [1-1]. These six DMRS ports can be allocated to a single user (SU-MIMO, single-user MIMO) or to multiple users (MU-MIMO, multi-user MIMO). Although the diagram shows a maximum of six DMRS ports, in practice, base stations may not necessarily allocate all six DMRS ports to users during scheduling. For example, when there are few users in the cell and the total number of ports required by each user is small, the base station may only need to send one or two port signals.

[0110] To simplify code-based demodulation, all QCL parameters of two DMRS ports within the same CDM group are identical. This ensures that during inter-symbol demodulation, the QCL of the interfering port is the same as that of the target port, facilitating accurate demodulation. A DMRS port group, or a quasi-co-location group within a DMRS group with all QCL parameters, is referred to as DMRS group type 1.

[0111] Figure 4 This is a schematic diagram of demodulation reference signal type 2 according to preferred embodiment 1. Figure 2 ,like Figure 4As shown, with 2 DMRS symbols, a maximum of 12 DMRS ports can be supported. These 12 DMRS ports are divided into 3 CDM groups: CDM group #0 contains ports p0, p1, p6, and p7; CDM group #1 contains ports p2, p3, p8, and p9; and CDM group #2 contains ports p4, p5, p10, and p11. Within CDM group #0, ports p0, p1, p6, and p7 occupy the same time-frequency resources, but use different time-domain or frequency-domain OCC codes. For example, p0 and p1 are distinguished by their frequency domain OCC codes, while their time domain OCC codes are the same. That is, p0 uses the frequency domain OCC code

[11] , and port p1 uses the frequency domain OCC code [1 -1]. In the time domain, both p0 and p1 use the OCC code [1 1]. Similarly, p6 and p7 are also distinguished by their frequency domain OCC codes, while their time domain OCC codes are the same. That is, p6 uses the frequency domain OCC code [1 1], and port p7 uses the frequency domain OCC code [1 -1]. In the time domain, both p6 and p7 use the OCC code [1 -1]. The same applies to the other four ports in the CDM group. In CDM group #1, p2 and p3 use different frequency domain OCC codes but the same time domain OCC code. p8 and p9 use different frequency domain OCC codes but the same time domain OCC code, but the time domain OCC codes used by p2 and p3 are different from those used by p8 and p9. In CDM group #2, p4 and p5 use different frequency domain OCC codes but the same time domain OCC code. p10 and p11 use different frequency domain OCC codes but the same time domain OCC code, but the time domain OCC codes used by p4 and p5 are different from those used by p10 and p11. This type of CDM group is called CDM group type 2, or code block type 2.

[0112] To simplify code demultiplexing, all QCL parameters for the four DMRS ports within the same CDM group can be predefined to be identical. However, this limits the number of CDM groups to a maximum of three.

[0113] The ports p0-p11 mentioned in this application are all integers, and not necessarily consecutive integers. For example, p0-p11 can actually represent ports 1000-1011.

[0114] Generally, at high frequencies, an NR base station can be configured with multiple antenna panels, each capable of transmitting different analog beams corresponding to different demodulation reference signal ports. Alternatively, a single panel can transmit one analog beam corresponding to multiple digital beams, each corresponding to a different DMRS port. Because multiple panels transmit different beams corresponding to multiple DMRS ports, the QCLs (Queries Classification Lines) for these ports may be different or the same.

[0115] When transmitting in multiple TRPs, and each TRP is a multi-panel configuration, limiting the CDM group to 3 means limiting the number of DMRS groups to 3, i.e., only supporting beam transmission of a maximum of 3 different QCLs, which may impose limitations on scheduling.

[0116] Therefore, for a DMRS pattern with two symbols, such as Figure 4 As shown, optionally, the 12 DMRS ports can be divided into 6 CDM groups. CDM group #0 contains ports p0 and p1, and p0 and p1 are distinguished by different frequency domain OCC codes. For example, the frequency domain OCC code used for p0 is [1 1], and the frequency domain OCC code used for port p1 is [1 -1]. CDM group #1 contains ports p2 and p3, and p2 and p3 are distinguished by different frequency domain OCC codes. CDM group #2 contains ports p4 and p5, and p2 and p3 are distinguished by different frequency domain OCC codes. CDM group #3 contains ports p6 and p7, and p6 and p7 are distinguished by different frequency domain OCC codes. CDM group #4 contains ports p8 and p9, and p8 and p9 are distinguished by different frequency domain OCC codes. CDM group #5 contains ports p10 and p11, and p10 and p11 are distinguished by different frequency domain OCC codes. Meanwhile, the ports of CDM group #0 and CDM group #3 occupy the same time-frequency resources, but use different time-domain OCC codes. For example, ports p0 and p1 of CDM group #0 use time-domain OCC code [1 1], while ports p6 and p7 of CDM group #3 use time-domain OCC code [1 -1]. The ports of CDM group #1 and CDM group #4 occupy the same time-frequency resources, but use different time-domain OCC codes. For example, ports p2 and p3 of CDM group #1 use time-domain OCC code [1 1], while ports p8 and p9 of CDM group #4 use time-domain OCC code [1 -1]. The ports of CDM group #2 and CDM group #5 occupy the same time-frequency resources, but use different time-domain OCC codes. For example, ports p4 and p5 of CDM group #2 use time-domain OCC code [1 1], while ports p10 and p11 of CDM group #5 use time-domain OCC code [1 -1]. Similarly, all QCL parameters of the DMRS ports within each CDM group are the same, while the QCL parameters of the DMRS ports in different CDM groups can be different. Different QCL parameters mean that some QCL parameters or all QCL parameters in the QCL parameter set are different. This type of CDM group is called CDM group type 1, i.e., code group type 1.

[0117] For a pattern of two DMRS symbols, a method for notifying the CDM group type may include: the base station notifying the user of the CDM group type using signaling. This generally refers to higher-layer RRC signaling, but MAC signaling or physical layer dynamic signaling is also possible. All QCL parameters of the DMRS ports within each CDM group are identical, but the QCL parameters of DMRS ports in different CDM groups may differ. In CDM type 1, the DMRS ports within a CDM group use the same code in the time domain but different codes in the frequency domain. In CDM type 2, a CDM group contains two type 1 CDM groups, and the DMRS ports in these two type 1 CDM groups occupy the same time-frequency resources, but their time-domain OCC codes are different. The number of DMRS ports in each CDM group in CDM group type 1 is half the number of ports in each CDM group in CDM type 2.

[0118] Thus, for base stations with a small number of antenna panels, or for users not used for multi-TRP transmission, the base station can be configured with CDM type 1; otherwise, it needs to be configured with CDM type 2.

[0119] Optionally, the base station only needs to configure the maximum number of demodulation reference signal port groups for the user via higher-layer signaling, without directly notifying the type of CDM group (code group). If the maximum number of demodulation reference signal port groups exceeds a threshold, then the CDM group type is type 1; otherwise, it is type 2.

[0120] When sending signals to a user via multiple DMRS ports, these DMRS ports can be divided into several DMRS port group types 1. All ports within each DMRS port group have the same QCL parameters, while ports in different DMRS port groups may have different QCL parameters. Therefore, a DMRS port group can contain DMRS ports from one or more CDM groups, and all these ports have the same QCL parameters. However, the QCL parameters of DMRS ports in different DMRS groups may differ. In this case, the base station needs to use signaling to indicate the QCL parameter information for each DMRS group to the user.

[0121] Similar to LTE, base stations can configure multiple sets of PQI parameters for users using higher-layer signaling. Each set of PQI parameters contains information related to PDSCH mapping and QCL parameters. This allows the user to be given a CSI-RS configuration ID. When receiving DMRS and data, the user uses the RS corresponding to this configuration ID to estimate some QCL parameter information, such as Doppler frequency offset, Doppler spread, average delay, and delay spread. The estimation results are then used for DMRS and data demodulation. Simultaneously, other parameters, such as csi-RS-ConfigZPId-r11, indicate the location of zero-power reference signals or other reference signals, indicating locations where no data is transmitted. This helps the UE understand how to perform data channel mapping or rate matching. Typically, higher layers configure four sets of PQI parameters, and then use 2 bits in the DCI to select one set to indicate to the user.

[0122] In NR, because multiple DMRS groups may have different QCL parameters, the parameters included in each PQI parameter set will vary. If the base station configures a maximum of two DMRS port groups for a user via higher-layer signaling, then each PQI parameter set should contain two sets of QCL-related information. For example...

[0123] {

[0124] Parameter subset 1: Used for data channel mapping or rate matching

[0125] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0126] Parameter subset 2-2: Indicates reference signal configuration ID#1 for QCL related parameter estimation.

[0127] }

[0128] Specifically, the reference signal corresponding to reference signal configuration ID#0 and the demodulation reference signal port group #0 have a QCL relationship, and the reference signal corresponding to reference signal configuration ID#1 and the demodulation reference signal port group #1 have a QCL relationship. The reference signal corresponding to reference signal configuration ID#0 or #1 can be one or more of a synchronization signal block (SS block), CSI-RS, or TRS. Generally, QCL parameters include (Doppler frequency offset, Doppler spread, average time delay, time delay spread, and spatial reception parameters). Therefore, the reference signal corresponding to reference signal configuration ID#i and the demodulation reference signal port group #i are quasi-co-located regarding {Doppler frequency offset, Doppler spread, average time delay, time delay spread, and spatial reception parameters}. More specifically, if reference signal configuration ID#i contains multiple reference signals, the uses of these multiple reference signals may be different. For example, this includes CSI-RS and TRS (tracking reference signal). CSI-RS is quasi-co-located with DMRS regarding (average delay, delay spread, spatial reception parameters), while TRS and DMRS are quasi-co-located regarding {Doppler frequency offset, Doppler spread}.

[0129] For multi-panel transmission, if all data and DMRS ports originate from the same crystal oscillator, only one PTRS port is needed. However, if the DMRS ports originate from different crystal oscillators, different PTRS ports are required. Similarly, for multi-TRP transmission, since multiple TRPs often use different crystal oscillators, multiple PTRS ports are needed. However, the nature of single-TRP or multi-TRP transmission, or single-panel or multi-panel transmission, can be dynamic. Sometimes multiple PTRS ports are needed, sometimes a single port, and the requirements differ between different cells or users. For example, for a single-panel TRP#0, if the linked UE#0 is a cell center user, multi-TRP transmission is not required, so only one PTRS port is needed. However, another UE#1 is a cell edge user, requiring multi-TRP transmission, which may necessitate multiple PTRS ports. To save signaling overhead, the base station can use higher-layer signaling to configure the maximum number of PTRS ports for each user, and then dynamically select the actual number of PTRS transmissions. For example, if the higher-layer signaling configures the maximum number of PTRS ports for UE#0 to be 1, then there is no need to dynamically notify the number of PTRS ports. However, if the higher-layer signaling configures the maximum number of PTRS ports for UE#0 to be 2, then 1 bit of signaling is needed to dynamically notify whether the number of PTRS ports is 1 or 2. And if the higher-layer signaling configures the maximum number of PTRS ports for UE#0 to be 4, then 2 bits of signaling are needed to dynamically notify the number of PTRS ports. This effectively saves dynamic signaling overhead for different situations. However, this method still requires explicit signaling to notify the maximum number of PTRS ports.

[0130] One method for notifying the maximum number of PTRS ports may include: the maximum number of PTRS ports is equal to the maximum number of DMRS port group type 1 ports. All DMRS ports in DMRS port group type 1 are quasi-co-located with respect to all QCL parameters. Since the same DMRS port group is quasi-co-located with respect to all QCL parameters, a DMRS group requires at most one PTRS port. However, the QCL parameters between different DMRS port groups are not guaranteed, and each DMRS port group may require one PTRS port. Therefore, the maximum number of PTRS ports does not need to be explicitly notified via signaling, but is predefined as equal to the maximum number of DMRS port group type 1 ports. This effectively saves on higher-layer signaling overhead.

[0131] In other words, since different DMRS port groups may originate from different TRPs or different antenna panels within the same TRP, each DMRS port group requires a PTRS port for phase noise estimation. Because different TRPs use different crystal oscillators, and different antenna panels may also use different crystal oscillators, and different crystal oscillators produce different phase noises, a separate PTRS port configuration is necessary. For simplicity, each demodulation reference signal port group can have a default PTRS port. This way, the base station does not need to separately notify the number of PTRS ports, as the number of PTRS ports is the same as the number of DMRS port groups. Furthermore, the PTRS port can be connected by default to the DMRS port with the smallest port ID in the corresponding DMRS port group; that is, the precoding of the PTRS port is the same as the precoding of the DMRS port with the smallest port ID in the corresponding DMRS port group.

[0132] It is worth noting that all parameters of QCL include {average gain, Doppler frequency offset, Doppler spread, average delay, delay spread, spatial reception parameters}, or only include {average gain, Doppler frequency offset, Doppler spread, average delay, delay spread}, depending on the specific situation.

[0133] Assuming DMRS has only one symbol and supports a maximum of 6 ports, the DMRS diagram is as follows: Figure 3 As shown. It is assumed that there are a maximum of two DMRS port groups, semi-statically configured by higher-layer signaling (RRC signaling or RRC signaling combined with MAC CE signaling). Based on the number of DMRS ports, DMRS groups can be predefined and mapped to CDM groups. A DMRS port of a CDM group can only belong to the same DMRS group. Of course, a DMRS group can contain ports corresponding to one or more CDM groups. Table 1 is a demodulation reference signal information indication table according to preferred embodiment 1. In Table 1, indication bit 6, p0 corresponds to DMRS group 0, and p1 corresponds to DMRS group 1. This mapping relationship can be predefined in the table without signaling notification.

[0134] Since there can be a maximum of two DMRS port groups, there can also be a maximum of two PTRS ports. When there is only one DMRS group, the PTRS port is m0; otherwise, it is ports m0 and m1. As shown in the table, for example, in indicator bit 7, ports p1 and p3 correspond to PTRS ports m0 and m1 respectively; in indicator bit 9, ports p0 and p1 correspond to m0, p2 corresponds to m1, and m0 and p1 match, with the same precoding; in indicator bit 10, port p3 corresponds to m0, while p4 and p5 correspond to m1, and m1 and p4 match, with the same precoding.

[0135] Table 1

[0136]

[0137] All QCL parameters are identical within a DMRS port group. Since the PTRS and the matched DMRS port have the same precoding, the PTRS and the matched DMRS port are quasi-co-located with respect to all QCL parameter sets. Therefore, the quasi-co-located relationship between the PTRS and the corresponding DMRS port group with respect to all QCL parameters can be derived. As described above, one PTRS port corresponds to one DMRS port group and is matched with the lowest-order DMRS port in the DMRS group.

[0138] However, simply using a one-to-one correspondence between PTRS ports and DMRS port groups increases PTRS overhead. If multiple antenna panels from the same TRP share the same crystal oscillator, then these DMRS ports can share a single PTRS port, such as... Figure 5 As shown, Figure 5 This is a schematic diagram of multiple DMRS port groups sharing the same crystal oscillator according to preferred embodiment 1. However, since the multiple DMRS port groups may originate from different beams, some parameters of the QCL differ, but not all parameters. Because they originate from the same TRP and share the crystal oscillator, the two DMRS port groups and the shared PTRS are actually still quasi-co-located with respect to certain parameters. Specifically, all DMRS of the two DMRS port groups are still quasi-co-located with respect to {Doppler spread, Doppler shift}.

[0139] To save overhead, the relationship between the two DMRS port groups needs to be communicated in the PQI parameter set. One method for notifying PTRS ports may involve using PQI indication information to indicate PTRS port information.

[0140] Furthermore, the number of PTRS ports is indicated using PQI indication information.

[0141] One implementation involves indicating in the PQI parameter set whether multiple DMRS port groups are quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler shift}. Each DMRS port group is quasi-co-located with respect to all QCL parameters. If some DMRS port groups are quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler shift}, then these DMRS port groups share a single PTRS port. Conversely, if some DMRS port groups are not quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler shift}, then these DMRS port groups cannot share a single PTRS port.

[0142] If parameter subset 3 indicates that the DMRS port groups corresponding to parameter subsets 2-1 and 2-2 are quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler frequency shift}, then the two DMRS port groups share one PTRS port; otherwise, each group has its own PTRS port.

[0143] {

[0144] Parameter subset 1: Used for data channel mapping or rate matching

[0145] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0146] Parameter subset 2-2: Indicates reference signal configuration ID#1 for QCL related parameter estimation.

[0147] Parameter subset 3: Used to indicate whether the DMRS port groups corresponding to parameter subsets 2-1 and 2-2 are quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler frequency shift};

[0148] }

[0149] Another direct method is to directly indicate in the PQI parameter set whether multiple DMRS port groups share a PTRS port.

[0150] {

[0151] Parameter subset 1: Used for data channel mapping or rate matching

[0152] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0153] Parameter subset 2-2: Indicates reference signal configuration ID#1 for QCL related parameter estimation.

[0154] Parameter subset 3: Used to indicate whether the DMRS port groups corresponding to parameter subsets 2-1 and 2-2 share PTRS ports.

[0155] }

[0156] Of course, if there is only one subset of parameters in the PQI parameter set used for QCL-related parameter calculation, then parameter subset 3 is not needed, because having only one parameter subset means having only one DMRS port group.

[0157] Another implementation method is that the UE determines the quasi-co-location of different DMRS port groups with respect to the QCL parameters {Doppler spread, Doppler shift} based on the different reference signal configurations indicated in the PQI parameter subsets. If a reference signal included in reference signal configuration ID#0 indicated in parameter subset 2-1 and a reference signal included in reference signal configuration ID#0 indicated in parameter subset 2-2 are quasi-co-located with respect to the parameters {Doppler spread, Doppler shift}, then the DMRS port groups corresponding to parameter subset 2-1 and parameter subset 2-2 can share one PTRS port; otherwise, two PTRS ports need to be configured for the DMRS port groups corresponding to parameter subset 2-1 and parameter subset 2-2.

[0158] {

[0159] Parameter subset 1: Used for data channel mapping or rate matching

[0160] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0161] Parameter subset 2-2: Indicates reference signal configuration ID#1 for QCL related parameter estimation.

[0162] }

[0163] Table 2 shows the four sets of PQI parameters according to the preferred embodiment 1. As shown in Table 2, the base station configures four sets of PQI parameters via higher-layer signaling, and the base station configures a maximum of two DMRS port groups for the user via higher-layer signaling, meaning there are at most two parameter subsets indicating different QCL assumptions. It is assumed that NZP CSI-RS is used for estimating the {average delay, delay spread, and spatial reception parameters} in the QCL parameters, while TRS is used for estimating the {Doppler frequency offset and Doppler spread} in the QCL parameters. Since the reference signal configurations indicated by parameter subsets 2-1 and 2-2 in the first and second sets of PQI parameters contain the same TRS resources, the two DMRS port groups corresponding to parameter subsets 2-1 and 2-2 are quasi-co-located regarding the QCL parameters {Doppler frequency offset and Doppler spread}, and therefore share one PTRS port. Therefore, no additional signaling indication is needed. The UE only needs to determine whether the corresponding DMRS port group shares the PTRS port based on whether the reference signal configured in different parameter subsets is related to the quasi-co-location of {Doppler frequency offset, Doppler spread}.

[0164] Table 2

[0165]

[0166] This method may require higher-layer signaling to notify the user which resources have reference signals that are quasi-co-located with respect to the parameters {Doppler spread, Doppler shift}. Then, after the user learns that the reference signal corresponding to reference signal configuration ID#0 in parameter subset 2-1 and the reference signal corresponding to reference signal configuration ID#1 in parameter subset 2-2 are different, if the reference signal resources with respect to the parameters {Doppler spread, Doppler shift} are different, the user can determine whether these different reference signal resources are quasi-co-located with respect to {Doppler spread, Doppler shift} based on the signaling notified by the higher layers. For example, in Table 2 above, in the third set of PQI parameters, if the higher-layer signaling configures NZP CSI-RS ID#2 and NZP CSI-RS ID#3 as quasi-co-located with respect to {Doppler spread, Doppler shift}, the UE can also deduce that these two DMRS port groups share PTRS.

[0167] It is worth noting that each parameter subset indicates that the reference signals included in the reference signal configuration ID can be one or more reference signals, such as CSI-RS and TRS (tracking reference signal). It can also be one or more reference signal resources of a single reference signal, as shown in Table 2 above.

[0168] More directly, one method for notifying PTRS information is for the base station to directly indicate the PTRS port ID using PQI indication information. As shown below, the PTRS port ID is directly indicated in subsets 2-1 and 2-2 that indicate QCL-related parameters.

[0169] {

[0170] Parameter subset 1: Used for data channel mapping or rate matching

[0171] Parameter subset 2-1: Indicates reference signal configuration ID#0, performs QCL related parameter estimation and indicates PTRS port number.

[0172] Parameter subset 2-2: Indicates reference signal configuration ID#1, performs relevant parameter estimation for QCL, and indicates PTRS port number.

[0173] }

[0174] In other words, the reference signal configuration IDs #0 and #1 indicated in parameter subsets 2-1 and 2-2 contain the PTRS port IDs. Furthermore, the PTRS port IDs indicated in parameter subsets 2-1 and 2-2 can be the same or different. If they are the same, then the PTRS is shared; otherwise, it is not shared. Table 3 is a second set of four PQI parameter tables according to preferred embodiment 1, as shown in Table 3.

[0175] Table 3

[0176]

[0177] As can be seen from the above examples, there are two types of DMRS groups. In DMRS group type 1, all DMRS ports are quasi-co-located with respect to all QCL parameters. In DMRS group type 2, all DMRS ports are quasi-co-located with respect to {Doppler spread, Doppler shift} or share a PTRS port. Therefore, DMRS group type 2 can contain one or more DMRS groups of type 1.

[0178] The higher-level signaling mentioned in this article refers to RRC signaling, MAC layer signaling, or a combination of RRC signaling and MAC signaling.

[0179] Since PQI signaling is not yet definitively established in NR, the PQI signaling described in this article may only contain QCL-related information or may contain both PDSCH mapping information and QCL-related information.

[0180] The above scheme uses PQI signaling to notify PTRS port information. For example, each set of PQI parameters contains two DMRS port groups, but in practice, it can contain more than two DMRS port groups.

[0181] For example, the base station uses PQI indication information to directly indicate the PTRS port ID. The following are four DMRS port groups.

[0182] {

[0183] Parameter subset 1: Used for data channel mapping or rate matching

[0184] Parameter subset 2-1: Indicates reference signal configuration ID#0, performs QCL related parameter estimation and indicates PTRS port number.

[0185] Parameter subset 2-2: Indicates reference signal configuration ID#1, performs relevant parameter estimation for QCL, and indicates PTRS port number.

[0186] Parameter subset 2-3: Indicates reference signal configuration ID#1, performs QCL related parameter estimation and indicates PTRS port number.

[0187] Parameter subset 2-4: Indicates reference signal configuration ID#1, performs relevant parameter estimation for QCL, and indicates PTRS port number.

[0188] }

[0189] Alternatively, the base station can use separate PQI signaling to indicate the QCL information of multiple DMRS port groups separately, requiring two PQI indication fields for each PQI indication. The scheme described in this article can also be applied.

[0190] PQI indicator field 1

[0191] {

[0192] Parameter subset 1: Used for data channel mapping or rate matching

[0193] Parameter subset 2: Indicator reference signal configuration ID#0, used for QCL related parameter estimation and indication of PTRS port number for DMRS port group #0.

[0194] }

[0195] PQI indicator field 2

[0196] {

[0197] Parameter subset 1: Used for data channel mapping or rate matching

[0198] Parameter subset 2: Indicator reference signal configuration ID#0, used for QCL related parameter estimation and indication of PTRS port number for DMRS port group #1.

[0199] }

[0200] The following are several supplementary embodiments of preferred embodiment 1:

[0201] Preferred embodiment 1a: DMRS type 1

[0202] A DMRS pattern based on IFDM (Interleaved Frequency Domain Multiplexing), which we call DMRS Type 1, can effectively support a maximum of 4 ports in a single DMRS symbol (e.g., Figure 6 As shown), it supports a maximum of 8 ports with 2 DMRS symbols (e.g. Figure 7 (As shown).

[0203] Figure 6 This is a schematic diagram of demodulation reference signal type 1 according to preferred embodiment 1a. Figure 1 ,like Figure 6 As shown, the DMRS port is divided into two CDM groups. CDM group #0 contains p0 and p2, and p0 and p2 occupy the same time-frequency resources and are distinguished by different codes, such as different CS (cyclic shift) sequences. CDM group #1 contains p1 and p3, and p1 and p3 occupy the same time-frequency resources and are distinguished by different codes.

[0204] Figure 7 This is a schematic diagram of demodulation reference signal type 1 according to preferred embodiment 1a. Figure 2 ,exist Figure 7In this configuration, the eight ports are divided into two CDM groups. CDM group #0 contains ports p0, p2, p4, and p6, and p0, p2, p4, and p6 occupy the same time-frequency resources. p0 and p2 use different codes in the frequency domain; for example, p0 uses CS sequence 0, and p2 uses CS sequence 1. p4 and p6 also use different codes in the frequency domain. However, p0 and p2 use the same OCC code in the time domain, and p4 and p6 also use the same OCC code in the time domain, but different from the OCC codes used by p0 and p2 in the time domain. Similarly, CDM group #1 contains ports p1, p3, p5, and p7. p1 and p3 use different CS codes in the frequency domain but the same OCC code in the time domain; p5 and p7 use different CS codes in the frequency domain but the same OCC code in the time domain, but different from the OCC codes used by p1 and p3 in the time domain. All ports in a port group are mapped to the same time-frequency resource and are distinguished from each other by different time-domain or frequency-domain codes. This type of CDM group is called CDM group type 2.

[0205] Similar to DMRS Type 2, limiting CDM groups to 2 means limiting the number of DMRS port groups to 2, i.e., only supporting a maximum of 2 beams of different QCLs. This may impose limitations on scheduling, especially in multi-TRP multi-panel transmission.

[0206] To support more DMRS port groups, for a DMRS pattern with two symbols, such as Figure 7 As shown, optionally, the 8 DMRS ports can be divided into 4 CDM groups. CDM group #0 includes ports p0 and p2, with p0 and p2 using different codes in the frequency domain; for example, p0 uses CS sequence 0, and p2 uses CS sequence 1. CDM group #1 includes ports p1 and p3, with p1 and p3 using different codes in the frequency domain. CDM group #2 includes ports p4 and p6, with p4 and p6 using different codes in the frequency domain. CDM group #3 includes ports p5 and p7, with p5 and p7 using different codes in the frequency domain. The DMRS ports in CDM group #0 and CDM group #2 occupy the same time-frequency resources and are distinguished by different time-domain OCC codes; similarly, the DMRS ports in CDM group #1 and CDM group #3 occupy the same time-frequency resources and are distinguished by different time-domain OCC codes. This allows for a maximum of 4 DMRS port groups. This type of CDM group is called CDM group type 1, or code grouping type 1.

[0207] A method for notifying CDM group types may include: the base station notifying the user of the CDM group type using signaling. This generally refers to higher-layer RRC signaling, but MAC signaling or physical layer dynamic signaling is also possible. All QCL parameters of the DMRS ports within each CDM group are identical, but the QCL parameters of the DMRS ports in different CDM groups may differ. In CDM type 1, the DMRS ports within a CDM group use the same code in the time domain but different codes in the frequency domain. In CDM type 2, a CDM group contains two type 1 CDM groups, and the DMRS ports in these two type 1 CDM groups occupy the same time-frequency resources, but their time-domain OCC codes are different. The number of DMRS ports in each CDM group in CDM group type 1 is half the number of ports in each CDM group in CDM type 2.

[0208] Thus, for base stations with a small number of antenna panels, or for users not used for multi-TRP transmission, the base station can be configured with CDM type 1; otherwise, CDM type 2 needs to be configured. This design is beneficial for DMRS signaling design, as different CDM types of DMRS information notifications can be designed separately.

[0209] Another implicit method for notifying CDM group type is for the base station to implicitly indicate the CDM group type by indicating the largest number of DMRS port groups. If the number of DMRS port groups notified to the user is greater than N, then the CDM group type is type 1; otherwise, it is type 2.

[0210] For DMRS type 1, PQI indication information can also be used to indicate PTRS port information. Furthermore, PQI indication information can be used to indicate the number of PTRS ports.

[0211] One approach is to indicate in the PQI parameter set whether multiple DMRS port groups are quasi-co-located with respect to the QCL parameters {Doppler spread, Doppler shift}.

[0212] Optionally, the UE determines the quasi-co-location of different DMRS port groups with respect to the QCL parameters {Doppler spread, Doppler shift} based on the different reference signal configurations indicated in the PQI parameter subsets. If a reference signal included in reference signal configuration ID#0 indicated in parameter subset 2-1 and a reference signal included in reference signal configuration ID#0 indicated in parameter subset 2-2 are quasi-co-located with respect to the parameters {Doppler spread, Doppler shift}, then the DMRS port groups corresponding to parameter subset 2-1 and parameter subset 2-2 can share a PTRS port. Otherwise, two PTRS ports need to be configured for the DMRS port groups corresponding to parameter subset 2-1 and parameter subset 2-2. In this case, it is not necessary to introduce a third parameter set to associate the QCL parameter set corresponding to the DMRS port group.

[0213] It's worth noting that even if the base station indicates the number of PTRS ports via PQI, such as one, in practice, PTRS might not be transmitted on that port. This depends on factors such as the MCS configured for the user and bandwidth. If the MCS is too small, the allocated bandwidth resources are insufficient, or the number of PRBs is too low, then PTRS will not be transmitted. Furthermore, PTRS is a reference signal used for phase tracking and may also be a special type of DMRS.

[0214] Preferred embodiment 1b:

[0215] The methods described above primarily use PQI signaling to jointly indicate the number of PTRS ports, sequence numbers, and other information. This method is mainly used for downlink, as QCL-related indication information is generally only available in downlink. However, for uplink, if there is no QCL-related signaling, how can the number of PTRS ports or port IDs be communicated to the user? One direct approach is to dynamically notify the PTRS of port information using clear signaling; however, this increases the DCI overhead for notifying uplink scheduling information.

[0216] In NR (Radio Frequency Identification), not only can base stations be configured with multiple antennas, but users also have many antennas, potentially mounted on numerous antenna panels. If different antenna panels share the same crystal oscillator, then the user only needs one PTRS port. However, if different antenna panels do not share a crystal oscillator, then the DMRS ports transmitted by different panels need to correspond to separate PTRS ports. In other words, if some DMRS ports originate from the same panel, then these DMRS ports correspond to the same PTRS port; otherwise, they may correspond to different PTRS ports.

[0217] Furthermore, in NR, base stations perform beam training before scheduling user data. For example, the base station configures multiple SRS resources for a user via higher-layer signaling, with each SRS resource representing a different user transmission beam. If a user has two antenna panels, each panel can use four beams in different directions to transmit SRS, so the two panels need to be configured with eight SRS resources to transmit eight different beams. The resource IDs of these eight SRS resources can range from 0 to 7. After the user transmits the eight different beams of SRS on the configured eight SRS resources, the base station can determine which beam(s) are best suited for data transmission through measurements. Therefore, when scheduling uplink data transmission, the base station needs to notify the user in the DCI which beam to use. At this time, the base station can notify the user of the SRI (SRS resource indicator) value in the DCI; the SRI represents the resource ID of the SRS previously used for transmission.

[0218] The base station can notify only one SRI. In this case, the beam used by the user when transmitting data is the same as the beam used by the SRS resource corresponding to that SRI that was previously transmitted. Since one SRI generally corresponds to one SRS resource, usually one analog beam, and comes from one panel, only one PTRS port needs to be configured for one SRI. When the user transmits data, it uses the analog beam corresponding to that SRI. Under this analog transmission beam, different digital beams can correspond to different DMRS ports. That is to say, even if the base station instructs the user to send one SRS, there may be multiple uplink DMRS ports. When channel reciprocity is not met, the base station also needs to configure TPMI (Transmit precoder matrix indicator) for the user, and the user performs uplink precoding processing according to the TPMI instruction.

[0219] Alternatively, the base station can notify the user of multiple SRIs, each corresponding to a beam and an SRS resource. For standardization, this might be implemented as follows: one SRS corresponds to one DMRS port, meaning the user transmits data using the beams indicated by the allocated SRIs, with each beam corresponding to a DMRS port. In this case, if the beams indicated by the multiple SRIs come from different antenna panels, one PTRS port is clearly insufficient; however, if the beams indicated by the multiple SRIs come from a single antenna panel, one PTRS port is sufficient.

[0220] As can be seen, the base station can use SRI signaling to notify the PTRS port information, including the number of ports or port IDs. If the base station uses only one SRI to notify the user when sending uplink data, then there can only be one PTRS port. However, if the base station uses multiple SRIs to notify the user when sending uplink data, the number of PTRS ports may be one or more.

[0221] A method for notifying uplink PTRS port information may include: a first communication node using joint signaling to notify a second communication node to send beam configuration information and phase tracking reference signal configuration information.

[0222] Optionally, the configuration information of the phase tracking reference signal includes at least one of the following: the number of ports of the phase tracking reference signal, the port ID, and the maximum number of ports.

[0223] Optionally, the beam configuration information transmitted may include at least one of the SRS resource indication and the transmission precoding matrix indication.

[0224] Optionally, the configuration information of the transmitted beam includes at least one of the SRS resource indication and the downlink reference signal resource indication.

[0225] SRI stands for SRS Resource Indicator ID. Besides SRI, the base station may also notify the user of the Transmission Precoding Matrix Indicator (TPMI). If the TPMIs of two SRIs are related—for example, if the base station simultaneously notifies the user that the TPMIs corresponding to two SRIs have a phase difference—it proves that the beams corresponding to these two SRIs belong to the same panel. In this case, the beams corresponding to these two SRIs are essentially linearly combined, and the DMRS ports corresponding to these two SRIs can share a single PTRS port. Otherwise, the effectiveness of this linear combination will be affected by phase noise.

[0226] Optionally, the SRS resource configuration includes PTRS port information. Generally, the base station configures N SRS resources for a user via higher-layer signaling. The user then periodically transmits SRS on these N SRS resources, or periodically transmits some of the N SRS resources, or semi-continuously transmits them. During higher-layer signaling configuration, the configuration information for an SRS resource typically includes multiple or all of the following: SRS bandwidth, start position, frequency domain density, number of antenna ports, whether frequency hopping is required, and period.

[0227] SRS Resource ID#i

[0228] {

[0229] SRS bandwidth

[0230] Frequency domain location,

[0231] Frequency domain density,

[0232] Time Domain Location

[0233] Number of antenna ports

[0234] Frequency hopping information

[0235] cycle ...

[0237] }

[0238] When configuring these parameters for an SRS resource using higher-layer signaling, the base station can add an item, namely the PTRS port information, such as adding the PTRS port ID. The maximum PTRS port ID can be based on the maximum number of PTRS ports reported by the user. Therefore, when configuring the SRS resource using higher-layer signaling, the base station's configuration parameters are as follows, with the addition of the PTRS port ID item.

[0239] SRS Resource ID#i

[0240] {

[0241] SRS bandwidth

[0242] Frequency domain location,

[0243] Frequency domain density,

[0244] Time Domain Location

[0245] Number of antenna ports

[0246] Frequency hopping information

[0247] cycle ...

[0249] PTRS port ID

[0250] }

[0251] If a user supports a maximum of one PTRS port, the PTRS port ID defaults to 0, or this parameter can be omitted. If a user supports a maximum of two PTRS ports, the PTRS port ID can be either 0 or 1.

[0252] For example, a user can support a maximum of 2 PTRS ports, meaning the user has 2 antenna panels, each panel corresponding to N SRS resources, i.e., N beams. When the base station configures 2N SRS resources using higher-layer signaling, the PTRS port ID is 0 in the first N SRS resources and 1 in the last N SRS resources. Thus, when the base station uses DCI to notify uplink scheduling data, it indicates multiple SRIs, such as 2 SRIs, corresponding to 2 DMRS ports. After receiving the 2 SRI values, the user can find the PTRS port IDs configured in the corresponding SRS resources. If the PTRS port IDs configured in the SRS resources corresponding to the 2 SRIs are the same, it proves that the DMRS ports corresponding to these 2 SRIs come from the same panel, i.e., they share a PTRS port. Otherwise, 2 PTRS ports are needed. Therefore, the SRS resource configuration includes PTRS port information, and the SRS resource configuration information is configured by higher-layer signaling, generally RRC signaling. In other words, when the base station configures the SRS resource configuration information using higher-layer signaling, it has already configured the PTRS port information.

[0253] Optionally, it's unnecessary to configure PTRS port information in the resource configuration information of each SRS. Instead, SRS resources that can share a PTRS port can be configured as an SRS resource set or SRS resource group. Each SRS resource set corresponds to one PTRS port. Different SRS resource sets correspond to different PTRS ports. For example, based on the above example, the base station configures two SRS resource sets for the user. The first SRS resource set contains N SRS resources with resource IDs from 0 to N-1, and the second SRS resource set also contains N SRS resources with resource IDs from N to 2N-1. When the base station schedules user uplink data, it schedules one or more SRIs. Each SRS corresponds to one SRS resource, thus corresponding to one SRS resource set. If multiple SRIs assigned to the user belong to the same SRS resource set, then the DMRS ports corresponding to these SRIs share a PTRS port; otherwise, multiple PTRS ports must be assigned. For ease of understanding, it can be simply considered that the sequence number of an SRS resource set is the sequence number of the PTRS port.

[0254] The first SRS resource set {SRS resource ID#0, ID#1...ID#N-1}

[0255] The second SRS resource set {SRS resource ID#N, ID#N+1...ID#2N-1}

[0256] In summary, the first communication node uses joint signaling to notify the second communication node of the beam configuration information and the phase tracking reference signal configuration information. Furthermore, the phase tracking reference signal configuration information includes at least one of the following: the number of phase tracking reference signal ports, port ID, and maximum number of ports. The beam configuration information includes at least the SRS resource indication information. Generally, the SRS resource indication refers to the SRS resource ID. Each SRS resource corresponds to SRS resource configuration information, which is configured by the base station using higher-layer signaling. That is, each SRS resource indication corresponds to one SRS resource configuration information. This resource configuration information refers to the configuration information of the SRS resource, and may also include the configuration information of the SRS resource set. The SRS resource configuration information or the SRS resource set configuration information contains the PTRS port information.

[0257] The general process is as follows: the first communication node uses joint signaling to notify the second communication node of the configuration information of the SRI and the phase tracking reference signal. Each SRI corresponds to one SRS resource, one SRS resource corresponds to one SRS resource set, and one SRS resource set corresponds to one PTRS port. After receiving the SRI from the base station, the user can obtain the PTRS port information.

[0258] Optionally, the beams corresponding to the SRSs within an SRS resource set can originate from the same antenna panel. This means different SRS resource sets correspond to different antenna panels. All beams within an SRS resource set correspond to the same PTRS port ID. Beams from different SRS resource sets may correspond to the same or different PTRS port IDs, depending on whether the antenna panels for different SRS resource sets share a common crystal oscillator. If they do, the PTRS port IDs for different SRS resource sets will be the same; otherwise, they will be different. For clarity, each SRS resource set can be configured with a unique PTRS port number. For example, PTRS ID#0 may or may not be equal to PTRS ID#1, depending on the base station configuration. In other words, at least each SRS resource set corresponds to the same PTRS port ID.

[0259] The first SRS resource set is {[SRS resource ID#0, ID#1...ID#N-1], PTRS ID#0}

[0260] The second SRS resource set {[SRS resource ID#N, ID#N+1...ID#2N-1[,PTRS ID#1}}

[0261] Of course, the concept of SRS resource set can be omitted. In this case, the port information of PTRS must be carried in the configuration of each SRS resource.

[0262] In summary, the configuration of SRS resources and resource sets is configured by the base station through higher-layer signaling, not dynamically at the physical layer. The base station configures multiple SRS resources and then notifies the user of the IDs of one or more SRS resources via dynamic physical layer signaling.

[0263] The scheme of using SRI and SRS resource configuration to carry PTRS port information can be well applied in almost all scenarios, especially when the channel is not reciprocal, in which case beam training must be performed by transmitting SRS. However, when the channel is reciprocal, the base station can use the downlink reference signal resource ID (CRI) instead of SRI to indicate the beam used by the user when transmitting data. This CRI is the configuration information of the transmit beam used for PTRS port information indication. The downlink reference signal resource indicator can be a CSI-RS resource indicator (CRI) or a synchronization signal resource or ID indicator. The base station uses the CRI to indicate the resources of one or more CSI-RS. When the user receives the CSI-RS, it uses the receive beam corresponding to the CRI, and this receive beam is used for data transmission. Similar to using SRI and SRS configuration information to carry PTRS port information, CRI and CSI-RS resource configuration information can also be used to carry PTRS port information. For example, when configuring CSI-RS resources at higher layers, the base station divides these CSI-RS resources into several sets, and each set corresponds to a PTRS port ID. Here, the PTRS port refers to the uplink PTRS port information.

[0264] Furthermore, the first communication node mentioned in this article generally refers to a base station, and the second communication node generally refers to a user. Of course, it is also possible that the first communication node is also a user, used for D2D communication.

[0265] Furthermore, the PTRS described herein is generally used for phase noise estimation, but other applications are not excluded. Therefore, PTRS in this document is merely the name of a reference signal, and other reference signals are not excluded, such as a special demodulation reference signal. Generally, the base station will use higher-layer signaling to configure whether PTRS exists, depending on whether it is high-frequency or low-frequency. If the higher layer configures PTRS to exist, whether PTRS is actually transmitted and the density of PTRS are also related to the MCS and bandwidth allocated to users during scheduling.

[0266] Preferred embodiment 2:

[0267] The base station uses the indication information of PQI to indicate the configuration information of DMRS.

[0268] Furthermore, the indication information of PQI is used to indicate the number of symbols in DMRS.

[0269] Furthermore, the type of DMRS is indicated using the indication information of PQI.

[0270] Furthermore, the base station uses PQI indication information to indicate the table type for notifying DMRS information. These various tables for notifying DMRS information are either predefined or configured by higher layers.

[0271] Depend on Figure 3 4 (DMRS type 2) Figure 6 As can be seen in 7 (DMRS type 1), in order to achieve sufficient flexibility, the standard needs to support demodulation reference signal type 1 and demodulation reference signal type 2, and each demodulation reference signal type needs to support the case of 1 DMRS and the case of 2 DMRS.

[0272] To conserve dynamic signaling overhead, base stations can utilize higher-layer signaling to configure the type of demodulation reference signal for users, as well as the number of demodulation reference signal symbols. This means that when designing DCI signaling, only a separate table needs to be designed for each DMRS type, whether it involves one or two DMRS time-domain symbols, to notify the DMRS port ID, number of symbols, scrambling sequence ID, and whether it is transmitted simultaneously with data. Therefore, the signaling overhead in DCI is significantly reduced. As shown in Tables 4-7, for each DMRS type, only 5 bits are needed per symbol, meaning the indication status bits are less than or equal to 32. Based on semi-static configuration, the base station can configure whether to use one or two DMRS symbols based on the average traffic volume and number of users in the cell, thus maintaining the DCI overhead for DMRS information notification at 5 bits. If a cell has a small number of users and low traffic volume, the number of users requiring simultaneous multi-user scheduling will not be large, and the required number of DMRS ports per user will also be low. In this case, the base station can semi-statically configure one DMRS symbol for each user in the cell. For DMRS type 2, this supports a maximum of 6 DMRS ports, and for DMRS type 1, a maximum of 4 DMRS ports. However, if a cell has a large number of users and high traffic volume, resulting in a frequently high total number of DMRS ports for multi-user scheduling, the base station can configure two DMRS symbols for each user in the cell. In this case, for DMRS type 2, a maximum of 12 DMRS ports are supported, and for DMRS type 1, a maximum of 8 DMRS ports are supported.

[0273] However, this semi-static configuration method of the number of DMRS symbols limits scheduling flexibility, especially for users performing multipoint transmissions, such as those performing DPS (Dynamic Point Selection) transmissions. It is assumed that the DMRS type is semi-statically configured to users via RRC, and that this type is the same across all cells. Figure 8 This is a schematic diagram of multi-point dynamic switching transmission according to preferred embodiment 2, such as... Figure 8As shown, in time slot n, TRP#0 (transmission receiver point) sends data to UE#0, while in time slot n+1, TRP#1 sends data to UE#0. The base station sending data to UE#0 is dynamically switched. Since the number of connected users and traffic volume in TRP#0 may differ from those in TRP#1, the required number of DMRS symbols may also differ. For example, if TRP#0 is the serving cell of UE#0 and has a large traffic volume and a large number of connected users, then generally two DMRS symbols are needed. Therefore, TRP#0 configures two DMRS symbols for UE#0 via RRC signaling. However, TRP#1 has a smaller traffic volume and fewer connected users, so to save overhead and for more efficient DMRS design, the base station only needs to configure one DMRS symbol for each user. In this case, because different TRPs require different numbers of DMRS symbols, semi-static configuration of the number of DMRS symbols can cause problems. When the TRP sent to UE#0 is switched to TRP#0, since the number of DMRS symbols semi-statically configured for UE#0 is still 2, this forces TRP#1 to use 2 DMRS symbols to send data to UE#0, resulting in unnecessary waste. If other users in TRP#1 want to perform joint multi-user scheduling with UE#0, the number of DMRS symbols will not be consistent, because other users in TRP#1 may have previously been semi-statically configured with 2 DMRS symbols.

[0274] If the number of symbols in DMRS is configured flexibly, then for a DMRS type, the base station must use DCI signaling to dynamically notify DMRS information with 1 symbol and 2 symbols, which will increase the DCI overhead by at least 1 bit.

[0275] One method for indicating the number of DMRS symbols involves a base station using indication information from data channel mapping and QCL (PQI: PDSCH REMapping and Quasi-Co-Location Indicator) to indicate the number of DMRS symbols. The data channel mapping and QCL indication information is similar to the information in Table 7.1.9-1 of LTE standard 36.213. As described in 36.213, generally, the base station uses higher-layer signaling to configure multiple sets (e.g., four sets) of parameters to indicate PDSCH RE Mapping and Quasi-Co-Location Indicator. Then, as described in 36.212, for example in DCI format 2D, the base station uses a few bits of signaling to indicate which one was configured by the higher layer, for example, 2 bits. In the case of DPS scheduling, the multiple sets of PQI parameters configured by the higher layer may correspond to different TRP transmissions. For reasonable and flexible configuration of potentially different DMRS symbols for different TRPs, the PQI-indicated parameters may include the number of DMRS symbols. In this way, multiple sets of PQI parameters configured at higher levels can contain different numbers of DMRS symbols. In other words, the number of PQI and DMRS symbols are jointly notified. For example, the base station can configure two sets of PQI parameters using higher-level signaling as follows:

[0276] The first set of PQI parameters

[0277] {

[0278] Parameter subset 1: ZP-CSI-RS ID#0

[0279] Parameter subset 2-1: NZP CSI-RS ID#0

[0280] Parameter subset 2-2: NZP CSI-RS ID#1 ...

[0282] Parameter subset i: 1 DMRS symbol

[0283] }

[0284] Second set of PQI parameters

[0285] {

[0286] Parameter subset 1: ZP-CSI-RS ID#3

[0287] Parameter subset 2-1: NZP CSI-RS ID#3

[0288] Parameter subset 2-2: NZP CSI-RS ID#4 ...

[0290] Parameter subset i: 2 DMRS symbols

[0291] }

[0292] Then, in DCI, the base station uses dynamic physical layer signaling to notify which set of PQI parameters is being used, thereby achieving the goal of dynamically notifying the number of DMRS symbols without adding any additional physical layer dynamic signaling overhead.

[0293] Similarly, for users requiring CoMP (Coordinated Multiple Point) transmission, such as DPS, the TRP (Transmission Pointer) sending data to the user may dynamically switch, so the DMRS type (including demodulation reference signal type 1, 2) needs to be the same. Therefore, one method for indicating the DMRS type may include: the base station using data channel mapping and QCL (PQI: PDSCHRE Mapping and Quasi-Co-Location Indicator) indication information to indicate the DMRS type.

[0294] Table 4 is a table of DMRS symbols for DMRS information indication type 2 according to preferred embodiment 2, as shown in Table 4:

[0295] Table 4

[0296]

[0297]

[0298] Table 5 is a table of two DMRS symbols for DMRS information indication type 2 according to preferred embodiment 2, as shown in Table 5:

[0299] Table 5

[0300]

[0301]

[0302] Table 6 is a table of DMRS symbols for DMRS information indication type 1 according to preferred embodiment 2, as shown in Table 6:

[0303] Table 6

[0304]

[0305]

[0306] Table 7 is a table of two DMRS symbols for DMRS information indication type 1 according to preferred embodiment 2, as shown in Table 7:

[0307] Table 7

[0308]

[0309]

[0310] Since different DMRS types or different numbers of DMRS symbols correspond to different DMRS information tables, it can also be said that the type of table used to indicate DMRS notification information is determined by PQI indication information. These various DMRS notification tables are predefined or configured at higher levels, as shown in Tables 4 to 7. Of course, the table type indicated by PQI is not necessarily limited to different DMRS types or different numbers of DMRS symbols. Therefore, even if the DMRS type and symbol number are semi-statically configured by higher-level signaling and are not selected using dynamic signaling at the physical layer, it does not affect the use of this method.

[0311] The first communication node uses joint signaling to notify the quasi-co-site configuration information and the port mapping information of the demodulation reference signal. At this time, the port mapping refers to the table of DMRS information.

[0312] If the two DMRS port groups indicated by the PQI are not quasi-co-located with respect to all QCL parameters, then the indicator bits of the two allocated ports will include p0, p2, or p2, p3. Table 8a is a DMRS symbol table for DMRS information indication type 2 according to preferred embodiment 2, as shown in Table 8a: that is, the two DMRS ports should belong to two DMRS port groups or two CDM groups to ensure that the QCL is the same within the same CDM group. If the two DMRS port groups indicated by the PQI are quasi-co-located with respect to all QCL parameters, then the indicator bits of the two allocated ports will include p0, p1, or p2, p3, or p4, p5. Table 8b is a DMRS symbol table for DMRS information indication type 2 according to preferred embodiment 2, as shown in Table 8b:

[0313] As shown in Table 8b. Therefore, the DMRS information indication table can be divided into multiple categories according to whether all QCL parameters of the two DMRS port groups are co-located, in order to reduce the indication status bits of the DMRS table and thus reduce DCI overhead.

[0314] In other words, the base station uses combined indication information to notify the user of PQI indication information, and can also indicate DMRS port mapping information. Even with a DMRS information table, such as Table 8a, for indication i, if the PQI parameter subsets 2-1 and 2-2 received by the UE are the same, then port indication bit i represents p0, p1; otherwise, it represents p0, p2. That is, the DMRS port mapping relationship indicated by the indication bit is related to the PQI indication information.

[0315] Because the QCL information indicated by PQI is different, the DMRS port mapping transmission changes, and therefore the mapping from PTRS to DMRS port also changes accordingly.

[0316] Table 8a

[0317] instruct layer DMRS port DMRS symbol Scrambling ID PTRS port .. ... .. 1 symbol ... i 2 p0,p2 1 symbol 0 m0,m1 i+1 2 p1, p3 1 symbol 0 m0,m1 ... .. ... ... .. ... ... ... ... ...

[0318] Table 8b

[0319] instruct layer DMRS port DMRS symbol Scrambling ID PTRS port .. ... .. 1 symbol ... i 2 p0,p1 1 symbol 0 m0 i+1 2 p2, p3 1 symbol 0 m0 i+2 2 p4, p5 1 symbol 0 m0 ... ... ... ... ...

[0320] Preferred embodiment 3:

[0321] Different port sequences correspond to different QCL relationships.

[0322] To conserve PQI indication information, i.e. to minimize the number of PQI sets configured at higher layers, the base station uses the order of DMRS port mapping to implicitly indicate the QCL information of different DMRS port groups.

[0323] The first set of PQI parameters

[0324] {

[0325] Parameter subset 1: Used for data channel mapping or rate matching

[0326] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0327] Parameter subset 2-2: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0328] }

[0329] Second set of PQI parameters

[0330] {

[0331] Parameter subset 1: Used for data channel mapping or rate matching

[0332] Parameter subset 2-1: Indicates reference signal configuration ID#0 for QCL related parameter estimation.

[0333] Parameter subset 2-2: Indicates reference signal configuration ID#1 for QCL related parameter estimation.

[0334] }

[0335] As mentioned above, to save DCI overhead, it is assumed that only two sets of PQI parameters are configured for the user by the higher-layer signaling. The first set of PQI parameters indicates single-point transmission because the reference signal configuration IDs of parameter subsets 2-1 and 2-2 are the same. The second set of PQI parameters indicates multi-TRP transmission. The two DMRS port groups corresponding to parameter subsets 2-1 and 2-2 are not QCL. In this way, only 1 bit of DCI overhead is needed to notify the user whether it is the first or second set of PQI parameters. However, in multi-TRP transmission, scheduling will be restricted. For example, for a user with a layer of 5, if, as shown in Table 5, indicator bit 12 indicates that the number of DMRS ports allocated to a user is 5, namely ports p0, p1, p2, p3, and p4, then it can be assumed that DMRS port group #0 contains p0 and p1, corresponding to PQI parameter subset 2-1, and DMRS port group #1 contains ports p2, p3, and p4, corresponding to PQI parameter subset 2-2. In other words, the TRP corresponding to PQI parameter subset 2-1 defaults to transport layer 2, not layer 3. To support flexible scheduling, an option can be added to the indicator bits of the DMRS information. That is, for the five DMRS ports p2, p3, p4, p0, p1, compared to the indicator bits containing p0, p1, p2, p3, p4, the included DMRS ports remain unchanged, only the order changes. In this case, p2, p3, p4 can be defaulted to PQI parameter subset 2-1, while ports p0, p1 correspond to subset 2-2.

[0336] To achieve flexibility, a notification method for different DMRS port orders involves defining multiple DMRS information indication bits that contain the same DMRS port, but the order of the DMRS ports indicated by the multiple indication bits is different. Different DMRS port orders correspond to different QCL parameters. Table 9 is a DMRS symbol table for DMRS information indication type 2 according to preferred embodiment 3, as described in the three-layer representation in Table 9.

[0337] Table 9

[0338]

[0339]

[0340] Preferred embodiment 4:

[0341] If a base station configures a user with more than one DMRS group, issues may arise regarding DMRS port indication. For example, with one DMRS symbol, if a user UE#0 transmits at layer 6 (meaning 6 DMRS ports are configured for that user), and the PQI parameter set includes parameter subsets 2-1 and 2-2, problems will occur if the QCL parameter information indicated by 2-1 and 2-2 differs. Assuming each DMRS port group contains the same number of DMRS ports (3), there will always be one CDM group containing two DMRS ports from different DMRS groups. This contradicts the predefined rule that DMRS ports within the same CDM group must have identical QCL parameters. Figure 3 As shown, for example, port group #0 contains p0, p1, p2; port group #1 contains p3, p4, p5. If the QCL assumptions of the two port groups are different, that is, the QCL parameters of ports p2 and p3 are different, but since p2 and p3 are in the same CDM group, and the QCL parameters of DMRS ports in a CDM group must be the same, a contradiction arises.

[0342] To avoid this situation, if a user configures 6 DMRS ports and maps them to only one DMRS symbol, then the predefined QCL for all DMRS ports will assume that only the information from either QCL parameter subset 2-1 or 2-2 is used. In other words, if a user configures QCL information for 2 port groups and configures 6 DMRS ports and maps them to only one DMRS symbol, then all predefined DMRS ports will use the QCL information configured for port group #0 or port group #1. More simply, if a user configures QCL information for 2 port groups and configures 6 DMRS ports and maps them to only one DMRS symbol, then all predefined DMRS ports will use only the QCL information corresponding to port group #0, and not the QCL information corresponding to port group #1.

[0343] This can be extended. If a user has configured QCL configuration information for multiple DMRS port groups, and some ports assigned to this user from the same CDM group, then all predefined DMRS ports will only use the QCL information corresponding to one of the DMRS port groups. Or, more directly, if a user has configured QCL configuration information for multiple DMRS port groups, and some ports assigned to this user from the same CDM group, then all predefined DMRS ports will only use the QCL information corresponding to the first DMRS port group. For example, if UE#0 is configured with QCL information for DMRS group 2, and the base station configures the user's DMRS ports as p0 and p1, and p0 and p1 come from the same CDM group, then the predefined p0 and p1 will only use the QCL parameter information configured in parameter subset 2-1, and not the QCL parameter information configured in parameter subset 2-2.

[0344] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0345] Example 2

[0346] According to another embodiment of the present invention, a base station is provided. Figure 9 This is a hardware structure diagram of a base station according to an embodiment of the present invention, such as... Figure 9 As shown, the base station 90 includes:

[0347] A first processor 902 is configured to determine joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-location configuration information and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information;

[0348] The first communication device 904 is used to send the joint signaling to the second communication node.

[0349] It should be added that in the method embodiments of Embodiment 1, the method embodiments that can be executed by the first communication node can all be executed by the base station 90 in this embodiment.

[0350] According to another embodiment of the present invention, a terminal is provided. Figure 10 This is a hardware structure diagram of a terminal according to an embodiment of the present invention, such as... Figure 10 As shown, the terminal 100 includes:

[0351] The second communication device 1002 is configured to receive joint signaling transmitted by the first communication, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information and transmission beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information.

[0352] The second processor 1004 is configured to receive data transmitted by the first communication node in accordance with the joint signaling, and / or to transmit data with the first communication node.

[0353] It should be added that in the method embodiments of Embodiment 1, the method embodiments that can be executed by the second communication node can all be executed by the terminal 100 in this embodiment.

[0354] It should be added that terminal 100 can be Figure 1 Mobile terminals in China.

[0355] Example 3

[0356] According to another embodiment of the present invention, a reference signal information indicating device is provided, applied to a first communication node, comprising:

[0357] The module determines joint signaling, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information and transmit beam configuration information; the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information;

[0358] The sending module is used to send the joint signaling to the second communication node.

[0359] It should be added that, in the method embodiment of Embodiment 1, the method steps executed by the first communication node can all be executed by the virtual device described above.

[0360] According to another embodiment of the present invention, a reference signal information indicating device is provided, applied to a second communication node, comprising:

[0361] A receiving module is configured to receive joint signaling transmitted by a first communication, wherein the joint signaling includes: first information and second information; wherein the first information includes at least one of the following: quasi-co-site configuration information and transmission beam configuration information; and the second information includes at least one of the following: phase tracking reference signal configuration information and demodulation reference signal configuration information.

[0362] The transmission module is used to receive data transmitted by the first communication node according to the joint signaling, and / or to transmit data with the first communication node.

[0363] It should be added that, in the method embodiment of Embodiment 1, the method steps executed by the second communication node can all be executed by the virtual device described above.

[0364] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0365] Example 4

[0366] In Embodiment 4, a system embodiment is also provided, which may include the first communication node and the second communication node in the above embodiments, as well as method steps for performing each of them.

[0367] Example 5

[0368] According to another embodiment of the present invention, a processor is provided for running a program, wherein the program, when running, performs the method described in any of the above optional embodiments.

[0369] Example 6

[0370] According to another embodiment of the present invention, a storage medium is provided, the storage medium including a stored program, wherein the program, when executed, performs the method described in any of the above optional embodiments.

[0371] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0372] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0373] Finally, the technical terms used in this application are listed in both Chinese and English in a table format:

[0374]

Claims

1. A method for indicating reference signal configuration information, characterized in that, include: The base station determines port information indicating one or more port IDs of the phase tracking reference signal; The base station determines a transmission precoding matrix indication corresponding to the port information indicating one or more port IDs of the phase tracking reference signal, wherein the ports corresponding to the probe reference signals associated with the transmission precoding matrix indication share the same port of the phase tracking reference signal; and The base station sends a downlink control information (DCI) signaling message to the terminal device, wherein the DCI signaling message includes a probe reference signal resource indication for the probe reference signal and a transmission precoding matrix indication.

2. The method according to claim 1, characterized in that, The port information indicating one or more port IDs of the phase tracking reference signal includes: The number of ports for the phase tracking reference signal.

3. A method for indicating reference signal information, characterized in that, include: The terminal device receives Downlink Control Information (DCI) signaling messages from the base station. These DCI signaling messages include a Detection Reference Signal Resource Indicator (DRS) and a Transmission Precoding Matrix Indicator (TRM), wherein the TRM corresponds to port information indicating one or more port IDs of a Phase Tracking Reference Signal, and the ports corresponding to the DCI associated with the TRM share the same port of the Phase Tracking Reference Signal. The terminal device uses one or more ports identified by the port IDs indicated by the port information of the phase tracking reference signal for uplink transmission.

4. The method according to claim 3, characterized in that, The port information indicating one or more port IDs of the phase tracking reference signal includes: The number of ports for the phase tracking reference signal.

5. A base station, characterized in that, include: Processor; and Memory including processor-executable code, wherein the processor-executable code, when executed by the processor, configures the processor to: Determine port information for one or more port IDs that indicate the phase tracking reference signal; Determine a transmission precoding matrix indication corresponding to the port information indicating one or more port IDs of the phase tracking reference signal, wherein the ports corresponding to the probe reference signals associated with the transmission precoding matrix indication share the same port of the phase tracking reference signal; as well as Sending Downlink Control Information (DCI) signaling messages to terminal devices, wherein the DCI signaling messages include a probe reference signal resource indication for the probe reference signal and a transmission precoding matrix indication.

6. The base station according to claim 5, characterized in that, The port information indicating one or more port IDs of the phase tracking reference signal includes: The number of ports for the phase tracking reference signal.

7. A terminal, characterized in that, include: Processor; and Memory including processor-executable code, wherein the processor-executable code, when executed by the processor, configures the processor to: The base station receives downlink control information (DCI) signaling messages, wherein the DCI signaling messages include a probe reference signal resource indication and a transmission precoding matrix indication for probe reference signals, wherein the transmission precoding matrix indication corresponds to port information indicating one or more port IDs of a phase tracking reference signal, wherein the port corresponding to the probe reference signal associated with the transmission precoding matrix indication shares the same port of the phase tracking reference signal. as well as Uplink transmission is performed using one or more ports identified by the port IDs indicated by the port information of the phase tracking reference signal.

8. The terminal according to claim 7, characterized in that, The port information indicating one or more port IDs of the phase tracking reference signal includes: The number of ports for the phase tracking reference signal.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein the program, when run by a processor, configures the processor to perform the method of any one of claims 1 to 4.

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