WO2019191972A1 - Information determining method and apparatus, and communication system - Google Patents

Abstract

An information determining method and apparatus, and a communication system. The method comprises: a terminal device determining the number of ports of a scheduled phase tracking reference signal (PTRS) according to the number of port groups of a scheduled demodulation reference signal (DMRS), wherein the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. In this way, the terminal device does not decode PTRSs with a number of ports greater than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with scheduling of a network device, thereby avoiding loss of flexibility in the scheduling of a network device, and reducing or avoiding wastage of resources and energy consumption.

Description

Information determination method, device and communication system Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to an information determining method, apparatus, and communication system.

Background technique

Large-scale multiple-input multiple-output (MIMO) technology is a key technology of the new wireless (NR, New radio) system, including, for example, research below 6 GHz and above 6 GHz. As the frequency band increases, the fading and loss generated in the transmission will increase accordingly. Beamforming technology becomes a key technology in large-scale MIMO technology because it can effectively compensate for fading.

When the carrier frequency is greater than 6 GHz, phase noise is caused due to the inconsistent oscillation frequency of the oscillator in the transmitter and the receiver, and the phase noise will cause inter-carrier between OFDM (Orthogonal Frequency Division Multiplexing) symbols. Interference and phase shift of the symbol as a whole.

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

Summary of the invention

The inventors have found that in order to enable the receiving end to detect the magnitude of the phase offset, a phase tracking reference signal (PTRS, Phased Reference Signal) is introduced in the new wireless (NR, New Radio) system. However, current indications of the number of PTRS ports can cause scheduling of network devices to be inflexible and can result in wasted resources and energy consumption.

The embodiment of the present invention provides an information determining method, device, and communication system. According to the embodiment of the present invention, the indication of the number of PTRS ports does not make the scheduling of the network device lose flexibility, and can reduce or avoid resource waste and energy consumption.

According to a first aspect of the embodiments of the present invention, a method for determining information includes:

The terminal device determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the port of the scheduled demodulation reference signal The number of groups.

According to a second aspect of the embodiments of the present invention, a terminal device is provided, including:

An information determining unit that determines a number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation reference The number of port groups for the signal.

According to a third aspect of the embodiments of the present invention, a method for determining information includes:

The network device determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signal; the number of ports of the scheduled phase tracking reference signal is less than or equal to the port of the scheduled demodulation reference signal The number of groups.

According to a fourth aspect of the embodiments of the present invention, a network device is provided, including:

An information determining unit that determines a number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation reference The number of port groups for the signal.

According to a fifth aspect of the embodiments of the present invention, there is provided a communication system comprising: the terminal device as described above; and the network device as described above.

The beneficial effect of the embodiment of the present invention is that the terminal device or the network device determines the number of scheduled PTRS antenna ports (hereinafter referred to as the number of PTRS ports) according to the number of scheduled DMRS antenna port groups (hereinafter referred to as the number of DMRS port groups). The number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. Therefore, the terminal device does not decode the PTRS larger than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with the scheduling of the network device, thereby not causing the scheduling of the network device to lose flexibility, and the resources can be reduced or avoided. Waste and energy consumption.

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

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

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

DRAWINGS

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

1 is a schematic diagram of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of a TCI state according to an embodiment of the present invention;

3 is a schematic diagram of an information determining method according to Embodiment 1 of the present invention;

4 is another schematic diagram of an information determining method according to Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of an information determining method according to Embodiment 2 of the present invention; FIG.

Figure 6 is a schematic diagram of an information determining apparatus according to Embodiment 4 of the present invention;

Figure 7 is a schematic diagram of an information determining apparatus according to Embodiment 5 of the present invention;

8 is a schematic diagram of a network device according to Embodiment 6 of the present invention;

Figure 9 is a schematic diagram of a terminal device according to Embodiment 6 of the present invention.

detailed description

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

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

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

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

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

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

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

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

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

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

Further, the term "network side" or "network device side" refers to one side of the network, which may be a certain base station, and may also include one or more network devices as above. The term "user side" or "terminal side" or "terminal device side" refers to a side of a user or a terminal, which may be a certain UE, or may include one or more terminal devices as above.

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

1 is a schematic diagram of a communication system according to an embodiment of the present invention. The terminal device and the network device are exemplarily illustrated. As shown in FIG. 1, the communication system 100 may include a network device 101 and a terminal device 102. For the sake of simplicity, FIG. 1 is only described by taking one terminal device and one network device as an example, but the embodiment of the present invention is not limited thereto. For example, network device 101 may have multiples to form multiple TRP transmissions or multiple panel transmissions.

In the embodiment of the present invention, an existing service or a service that can be implemented in the future can be performed between the network device 101 and the terminal device 102. For example, these services may include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability low latency communication (URLLC, Ultra-Reliable and Low). -Latency Communication), and so on.

In the present invention, after the network device obtains the beam of better quality reported by the terminal device, the beam can be used in the transmission of the physical channel (for example, a broadcast channel, a data channel, a control channel, etc.) to obtain a higher transmission. quality. At the same time, the NR supports the network device to indicate the used transmit beam to the terminal device, so that the terminal device determines which receive beam to use for alignment and reception. In addition, the beam indication may be equivalent to a quasi-co-location (QCL) indication, or may be equivalent to an indication of a Transmission Configuration Indication (TCI) state.

In the NR system, when performing beam indication for a Physical Downlink Control Channel (PDCCH), radio resource control (RRC) signaling and/or media access control (MAC, Media Access Control) may be used. ) Signaling (eg MAC-CE). For example, RRC signaling may be used to configure K TCI states for each control resource set (hereinafter referred to as CORESET); for a CORESET, when K>1, K-CEs are further activated using MAC-CE A state in the TCI state; when K=1, there is no need to use MAC-CE for activation, and the TCI state of the RRC configuration is the TCI state of the CORESET. When a downlink control information (DCI, Downlink Control Information) is transmitted, its TCI state is consistent with the TCI state of the CORESET used for its actual transmission.

RRC signaling and/or MAC-CE and/or DCI may be used when performing beam indication for a Physical Downlink Shared Channel (PDSCH). For example, M TCI states are configured in RRC signaling, and MAC-CE activates 2^N TCI states in M states. In DCI transmission, N bits are used to indicate one TCI in 2^N states. status.

Since the receive beamforming on the analog domain is performed when the signal arrives at the antenna particle, the TCI indication contained in the DCI may not be decoded for some symbols of the PDSCH when performing analog domain beamforming on it. Information, so the appropriate receive beam cannot be selected for analog beamforming.

Therefore, the time offset threshold is defined in the NR, that is, when the time offset between the time when the DCI is received and the certain symbol of the scheduled PDSCH is less than a certain threshold, the terminal device assumes the PDSCH of the symbol. The TCI state is consistent with the TCI state of the CORESET with the lowest (or smallest) number (ID) of all CORESETs configured in this time slot. When the time offset between the time when the DCI is received and a certain symbol of the scheduled PDSCH is greater than or equal to a certain threshold, the terminal device assumes that the TCI state of the PDSCH on the symbol is consistent with the TCI state indicated in the DCI. When calculating the time offset, the time at which the DCI is received may also be replaced by a fixed time that is clear to both the network device and the terminal device. A certain symbol of the PDSCH may be the first Orthogonal Frequency Division Multiplexing (OFDM) symbol occupied by the scheduled PDSCH in the time dimension, or may be the scheduled PDSCH in each slot (slot). The first OFDM symbol, that is, each slot, calculates a time offset value and then compares it with the time offset threshold.

In addition to this, the TCI status of the PDSCH may not be indicated. Whether the TCI status of the PDSCH is indicated may depend on the parameter TCI-PresentInDCI indicating the dynamic TCI status of the high layer configuration. The RRC signaling configures the parameter TCI-PresentInDCI for each CORESET. When the parameter is enabled, the DCI representing the CORESET transmission will include the TCI status indication field; and when the parameter is not enabled. (disabled), the DCI representing the CORESET transmission does not contain the TCI status indication field. When the TCI status of the PDSCH is not indicated or the terminal device does not receive the TCI status indication, a default TCI status needs to be defined, so that the network device and the terminal device perform the analog domain beam transmission according to the default TCI status. And receiving.

2 is a schematic diagram of a TCI state of an embodiment of the present invention. As shown in FIG. 2, when the time offset (offset) between the time when the DCI is received and the certain symbol of the scheduled PDSCH is less than a certain threshold, the default TCI state is adopted, and the default TCI state is the time slot. The TCI state of the CORESET with the lowest number (ID) in all CORESETs configured in it, as shown in Parts A and B of Figure 2; when the TCI-PresentInDCI is disabled, and the DCI is received and one of the scheduled PDSCHs When the time offset between symbols is greater than or equal to the threshold, the TCI state of the scheduled CORESET is used, as shown in part C of FIG. 2; and when the TCI-PresentInDCI is enabled, and the DCI is received and the scheduled PDSCH When the time offset between a certain symbol is greater than or equal to the threshold, the TCI state indicated in the DCI is employed, as shown in part D of FIG.

On the other hand, it is stipulated in the NR standard that the network device can configure one or two PTRS port numbers through the high-level parameter nrofPorts in the configuration information of each TCI state through higher layer signaling.

When the number of indicated PTRS ports is 2, each PTRS port is associated with one DMRS port in a Demodulation Reference Signal (DMRS) port group; and a PTRS port is considered to be associated with it. All ports in the DMRS port group of the DMRS port have a quasi-homologous relationship of {QCL-TypeA and QCL-TypeD}.

When the number of indicated PTRS ports is 1, and the DMRS ports scheduled for the terminal device are from 2 DMRS port groups, the terminal device considers the PTRS ports to be shared by the two DMRS port groups. And the PTRS port and all ports in the DMRS port group containing the DMRS port associated therewith have a quasi-homologous relationship of {QCL-TypeA and QCL-TypeD}; the PTRS port and the DMRS port not including the DMRS port associated therewith All ports in the group have a quasi-homologous relationship of QCL-TypeB.

When the number of indicated PTRS ports is 1, and the DMRS port scheduled to the terminal device is from one DMRS port group, the PTRS port is associated with one of the DMRS port groups, and the terminal device considers the PTRS port to be All ports in the DMRS port group have a quasi-homologous relationship of {QCL-TypeA and QCL-TypeD}.

If the scheduling interval (ie, the time offset offset described above) is less than the scheduling interval threshold TresholdSchedOffset (the scheduling interval threshold can be reported, for example, by the terminal device), the number of PTRS ports of the terminal device will be indicated by the TCI state of the default CORESET.

However, the inventor has found that, according to the related discussion of UE capability reporting, when the carrier interval is 60 kHz, the terminal device reports the candidate value of TresholdSchedOffset as {7, 14, 28} symbols; when the carrier interval is 120 kHz, the terminal device reports the TresholdSchedOffset. The candidate value is {14, 28} symbols. Each slot in the frame structure of the NR system contains 14 symbols. It can be seen from the scheduling interval candidate value that the PDSCH of the slot scheduling is only when the carrier interval is 60 kHz and the interval of the network device cross-symbol scheduling is greater than 7 symbols. The TCI status indicated by the scheduled DCI or the TCI status activated by the CORESET where the PDCCH is located may be used to receive the PDSCH; in other cases, the PDSCH of the simultaneous slot scheduling is received by the default CORESET activated TCI status.

If the nrofPorts parameter used to configure the number of PTRS ports in the default TCI state is set to 2, according to the existing standard, when the scheduling interval is less than the TresholdSchedOffset, there are always 2 PTRS ports scheduled to the terminal device, and the corresponding scheduling is sent to the terminal. The number of DMRS port groups of the device is also 2. This makes the scheduling of the network device lose flexibility, especially in the case of simultaneous slot scheduling; in addition, it leads to resource waste and energy consumption of the terminal device.

The embodiment of the present invention will be described below by taking the NR system as an example; however, the present invention is not limited thereto, and can be applied to any system or scenario in which similar problems exist.

Example 1

The embodiment of the invention provides an information determining method. FIG. 3 is a schematic diagram of an information determining method according to an embodiment of the present invention, showing a situation on the terminal device side. As shown in FIG. 3, the method includes:

Step 301: The terminal device determines the number of scheduled PTRS ports according to the number of scheduled DMRS port groups, where the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups.

As shown in FIG. 3, optionally, the method may further include:

Step 302: The terminal device receives the PTRS according to at least the number of scheduled PTRS ports.

Therefore, the terminal device determines that the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups, that is, does not decode PTRSs larger than the number of scheduled DMRS port groups; the number of decoded PTRSs can be maintained with the scheduling of network devices. Consistent, thereby not disabling the scheduling of network devices and reducing or avoiding resource waste and energy consumption.

4 is a schematic diagram of an information determining method according to an embodiment of the present invention; further description is made from a network device side and a terminal device side. As shown in FIG. 4, the method includes:

In step 401, the terminal device determines a default CORESET in the configuration information; wherein the default TCI state is activated, and the default TCI state indicates the number of PTRS ports, for example, the number is 2.

For example, it can be configured by the network device through RRC signaling, and so on. That is, the terminal device may receive indication information from the network device, where the indication information is used to indicate the number of PTRS ports.

Step 402: The network device sends downlink control information to the terminal device, where the downlink control information is used to schedule the downlink data channel. In addition, the downlink control information may be used to indicate at least the number of the scheduled DMRS port groups.

In this embodiment, the port of the scheduled DMRS is used to send a DMRS for demodulating the downlink data channel. The DMRS, the downlink data channel, and the PTRS sent by the scheduled PTRS port are in the same time interval, and the time interval may be at least one of: a time slot, a subframe, and a frame; but the present invention is not limited thereto. This can also be other time lengths or time units.

Step 403: The terminal device decodes the downlink control information.

Step 404: The terminal device determines the number of the scheduled DMRS port groups according to the decoded downlink control information. For example, the number of scheduled DMRS port groups can be determined to be 1 according to the DCI.

Step 405: The terminal device determines the number of scheduled PTRS ports according to the number of scheduled DMRS port groups, where the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. For example, in the case where the number of scheduled DMRS port groups is 1, the terminal device determines that the number of scheduled PTRS ports is one.

That is, the number of scheduled PTRS ports is different from the number of indicated PTRS ports.

In this embodiment, unlike the existing solution, the terminal device does not use the number of PTRS ports indicated by step 401, but uses the number of PTRS ports determined in step 405. As to which PTRS port is used, it can be determined according to the relationship between the PTRS port and the DMRS port group, which is not limited in this embodiment.

Step 406: The terminal device receives the PTRS according to at least the number of the scheduled PTRS ports; and

Step 407: The terminal device receives data in the downlink data channel (or may also be referred to as a receiving downlink data channel) based on the downlink control information. For example, the PDSCH can be decoded according to DCI.

For example, the DMRS transmitted to the DMRS port group of the terminal device determined in step 404 is used to demodulate the data. Therefore, only one DMRS port group is scheduled to the terminal device, and the corresponding number of PTRS ports scheduled to the terminal device is also 1. This enables the number of decoded PTRSs to be consistent with the scheduling of the network device, so that the scheduling of the network device does not lose flexibility, especially if the scheduling interval is less than the TresholdSchedOffset; in addition, it does not cause waste of resources and energy consumption of the terminal device. .

In this embodiment, the downlink control channel is, for example, a PDCCH, and the downlink data channel is, for example, a PDSCH, but the present invention is not limited thereto, and may be, for example, an enhanced PDCCH or an enhanced PDSCH, and the like.

It should be noted that the above FIG. 4 only schematically illustrates the embodiment of the present invention, but the present invention is not limited thereto. For example, the order of execution between the various steps can be appropriately adjusted, and other steps can be added or some of the steps can be reduced. Those skilled in the art can appropriately modify the above based on the above contents, and are not limited to the above description of FIG.

In an embodiment, in a case that the number of the scheduled DMRS port groups is less than the indicated number of PTRS ports, the terminal device may determine that the number of the PTRS ports is equal to the number of the scheduled DMRS port groups, or the terminal The device does not expect the number of scheduled DMRS port groups to be less than the number of PTRS ports.

For example, in a case where the offset between the downlink control information and the downlink data channel is less than a preset threshold, the number of PTRS ports is indicated by a default TCI state, or the number of PTRS ports is configured by a TCI state. The number of PTRS ports in the indication.

That is, when the number of PTRS ports is indicated by a signal other than DCI (for example, a default TCI state), if the number of DMRS port groups scheduled by the DCI is less than the number of indicated PTRS ports, the terminal device considers that the number of scheduled PTRS ports may be equal to The number of scheduled DMRS port groups, that is, the DCI has a scheduling priority.

For example, the number of PTRS ports is indicated by a TCI state activated by a CORESET, and the number of PTRS ports in the TCI state is configured to be 2. If the scheduling DCI indicates that only one set of DMRS ports is scheduled to transmit data information by the terminal device, the terminal device considers that only There is a PTRS port that sends a PTRS and the PTRS port is associated with one of the set of DMRS ports.

In another embodiment, the terminal device determines that the number of scheduled DMRS port groups is greater than or equal to the indicated number of PTRS ports, or the terminal device does not expect the number of scheduled DMRS port groups to be smaller than the indicated PTRS port. number.

That is, the terminal device considers that the number of scheduled PTRS ports should be equal to the number of indicated PTRS ports. For example, the TCI status indicating the number of PTRS ports is either the TCI status indicated by the TCI field in the DCI or the TCI status activated by a CORESET (default CORESET or CORESET carrying the scheduling DCI), and the terminal device does not expect to receive and be instructed. The number of PTRS ports is inconsistent with the number of antenna ports sent by the PTRS.

In another embodiment, in the case that the offset between the downlink control information and the downlink data channel is less than a preset threshold, the number of PTRS ports is indicated by a default TCI state; and the default TCI state The included parameter for indicating the number of PTRS ports is configured to be 1.

For example, when the scheduling interval is less than the TresholdSchedOffset, the number of PTRS ports is indicated by a default TCI state. If the nrofPorts parameter is configured in the default TCI state, the value of the parameter is 1.

The default TCI state may be the TCI state in which the CORESET of the minimum ID is activated, the TCI state in which the CORESET carrying the scheduled DCI is activated, or the TCI state indicating the hypothesis of the DMRS antenna port QCL for scheduling the PDSCH; The invention is not limited to this.

In this embodiment, in the case that the offset between the downlink control information and the downlink data channel is greater than or equal to a preset threshold, the number of PTRS ports is indicated by the TCI state of the CORESET where the scheduling DCI is located. The terminal device determines that the number of the scheduled DMRS port groups is greater than or equal to the indicated number of PTRS ports, or the terminal device does not expect the number of the scheduled DMRS port groups to be smaller than the indicated number of PTRS ports.

For example, when the scheduling interval is greater than or equal to the TresholdSchedOffset, if the TCI status of the CORESET application in which the DCI is scheduled indicates the number of PTRS ports, the terminal device considers that the number of scheduled DMRS port groups is greater than or equal to the indicated number of PTRS ports. That is, the terminal device does not expect the number of scheduled DMRS port groups to be smaller than the indicated number of PTRS ports.

For example, in a multi-TRP transmission mode (similar to LTE transmission mode 10), the number of PTRS ports in the TCI state indicated by the scheduling DCI of multiple TRP simultaneous transmission (the terminal device needs to simultaneously receive data from multiple TRPs) is configured as 2, and the starting position of the PDSCH indicated by the scheduling DCI should be greater than the ThresholdSchedOffset reported by the terminal device.

In one embodiment, one or more TCI states of the CORESET configured for the terminal device (eg, TCI states of all CORESETs) include parameters (eg, nrofPorts) for indicating the number of PTRS ports configured to be one.

For example, if the QCL of the DMRS port of the scheduled PDSCH is assumed to be indicated by a TCI state in which the CORESET is activated, the data of the PDSCH is from the same TRP, and the terminal device considers that the QSCH indicated by the TCI state assumes that the received PDSCH is the same One PDSCH.

In the present embodiment, the DCI includes information for indicating the TCI status. For example, in a transmission mode in which multiple TRPs are simultaneously transmitted, a DCI is always included in a DCI that schedules multiple TRPs to simultaneously transmit data. The starting position of the downlink data channel is greater than a preset threshold (for example, the ThresholdSchedOffset reported by the terminal device), or the first value of the starting location index table configured in the high layer signaling is greater than or equal to the preset. The number of symbols for the threshold begins.

The starting position may be the sum of the number of symbols occupied by the control area and the number of symbols of the preset threshold, or the starting position may be the first symbol position of the DMRS indicated by a broadcast channel (eg, PBCH) Or, the starting position may be a sum of a number of symbols before the first symbol position and a number of symbols of the preset threshold.

In an embodiment, in a case where the offset between the downlink control information and the downlink data channel is less than a preset threshold, the number of PTRS ports and/or the quasi-co-located (QCL) information of the received PDSCH may be determined by default. (eg using the default port parameters) indication. The default port parameter is a preset default value, and/or configuration information independent of the default TCI state of the CORESET.

For example, when the scheduling interval is less than TresholdSchedOffset, the number of PTRS ports is a default value. The default value can be 1, or it can be another value, or it can be a default value configured by higher layer signaling that is independent of the TCI state activated by CORESET.

In an embodiment, in a case that the offset between the downlink control information and the downlink data channel is less than a preset threshold, the default mode is indicated by a TCI state, and the TCI state may include at least one of the following:

--- receiving the activated TCI state of the CORESET with the smallest or largest number (ID) in the current time slot of the scheduled downlink data channel (eg PDSCH);

--- receiving an activated TCI state of the CORESET of the smallest or largest number of one or more CORESETs of the search space in the current time slot of the scheduled downlink data channel (eg PDSCH);

--- the activated TCI state of the CORESET with the smallest or largest number in the time slot in which the DCI is located;

--- the time slot in which the DCI is located contains the activated TCI state of the lowest or largest CORESET of one or more CORESETs in the search space;

--- The smallest or largest number of one or more CORESETs carrying the successfully received DCI in the time slot of the last successful reception of a certain DCI (eg, any DCI, not limited to the downlink control information described in step 402) The activated TCI state of CORESET;

--- The last successful successful reception of the DCI (e.g., the downlink control information described in step 402) in the time slot of the one or more CORESETs of the DCI that successfully received the successfully activated TCI state of the smallest or largest CORESET.

--- The TCI state used by the last successfully received downlink data channel (eg PDSCH). For example, in the case of cross-carrier scheduling, the TCI state employed by the most recently successfully received downlink data channel (e.g., PDSCH) on the same carrier as the scheduled downlink data channel (e.g., PDSCH). This method can also be applied to the case of the same carrier scheduling.

--- The TCI state with the smallest or largest number in the TCI state configured or activated by the higher layer signaling on the carrier where the scheduled downlink data channel (eg PDSCH) is located. For example, the method may be applicable to a case where a terminal device first receives a PDSCH scheduled on a certain carrier when performing cross-carrier scheduling. This method can also be applied to the case of the same carrier scheduling.

If the downlink data channel (e.g., PDSCH) is scheduled on a certain carrier, then the TCI state is the TCI state indicated by the DCI of the PDSCH on the scheduled carrier that was successfully received last time.

In an embodiment, the number of PTRS ports is indicated by a TCI state, and if the nrofPorts parameter is not configured in the TCI state, the terminal device (for example, the UE) considers that the PTRS is not sent; or

The number of PTRS ports is indicated by a default CORESET activated TCI state. If the CORESET is not configured with a TCI state or the nrofPorts parameter is not configured in the TCI state, the terminal device (eg, UE) considers that the PTRS is not transmitted.

It should be noted that the default TCI state is exemplified above, but the present invention is not limited thereto, and may be other TCI states.

In one embodiment, the relationship between the number of PTRS ports and the set of reference signals (RS set) can be as follows:

For example, the number of PTRS ports is indicated by the number of PTRS ports in the configuration information of the TCI state, and is equal to the number of RS sets configured in the TCI state. An RS set is a QCL indication of one or more DMRS port groups. One or more DMRS port groups corresponding to the same RS set are from one or more antenna panels of the same TRP, ie, the signals are sent by the same oscillator. The DMRS port groups corresponding to different RS sets are from different TRPs, that is, the DMRSs corresponding to different RS sets are sent by different oscillators.

For another example, the number of PTRS ports is determined according to the number of RS sets. For example, the number of PTRS ports can be implicitly obtained by the number of RS sets.

It is to be noted that the above embodiments are merely illustrative of the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the above respective embodiments. For example, each of the above embodiments may be used alone, or one or more of the above respective embodiments may be combined.

As shown in the foregoing embodiment, the terminal device determines the number of scheduled PTRS ports according to the number of scheduled PTRS port groups, where the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. Therefore, the terminal device does not decode the PTRS larger than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with the scheduling of the network device, thereby not causing the scheduling of the network device to lose flexibility, and the resources can be reduced or avoided. Waste and energy consumption.

Example 2

The embodiment of the present invention provides a method for determining information, and the same content as that of Embodiment 1 is not described herein.

FIG. 5 is a schematic diagram of an information determining method according to an embodiment of the present invention, showing a situation on the network device side. As shown in FIG. 5, the method includes:

Step 501: The network device determines, according to the number of port groups of the scheduled demodulation reference signals, the number of ports of the scheduled phase tracking reference signal; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation reference. The number of port groups for the signal.

As shown in FIG. 5, the method may further include:

Step 502: The network device sends downlink control information in the downlink control channel to the terminal device, where the downlink control information is used to schedule the downlink data channel. In addition, the downlink control information is used to indicate at least the scheduled solution. The number of port groups that adjust the reference signal.

As shown in FIG. 5, the method may further include:

Step 503: The network device sends the phase tracking reference signal based on at least a port number of the scheduled phase tracking reference signal;

Step 504: The network device sends data in the downlink data channel to the terminal device (or may also be referred to as sending a downlink data channel).

In an embodiment, the network device may further send indication information to the terminal device, where the indication information is used to indicate a number of ports of the phase tracking reference signal; wherein, the number of ports of the scheduled phase tracking reference signal may be The number of ports of the indicated phase tracking reference signal is different.

It should be noted that the above FIG. 5 only schematically illustrates the embodiment of the present invention, but the present invention is not limited thereto. For example, the order of execution between the various steps can be appropriately adjusted, and other steps can be added or some of the steps can be reduced. Those skilled in the art can appropriately adapt to the above contents, and are not limited to the above description of FIG.

As can be seen from the foregoing embodiment, the network device determines the number of scheduled PTRS ports according to the number of scheduled DMRS port groups; the number of ports of the scheduled PTRS is less than or equal to the number of scheduled DMRS port groups. Therefore, the terminal device does not decode the PTRS larger than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with the scheduling of the network device, thereby not causing the scheduling of the network device to lose flexibility, and the resources can be reduced or avoided. Waste and energy consumption.

Example 3

In the embodiment, the case of the beam failure recovery (BFR) is described on the basis of the embodiment 1 and/or the embodiment 2, and the same content as in the embodiment 1 and/or the embodiment is not described again. Moreover, the present embodiment may be independent of Embodiment 1 and/or Embodiment 2, that is, may exist without relying on Embodiment 1 and/or Embodiment 2.

In one embodiment, when the DCI is carried by the BFR dedicated control resource set (CORESET), the number of scheduled PTRS ports is a default value until the terminal device receives the high layer signaling to activate a TCI state. The default value can be, for example, 1 or it can be another value.

For example, if the DCI is included in the DCI, the terminal device will ignore the TCI information; the terminal device may receive the PDSCH by using the same quasi-co-located (QCL) information as the BFR dedicated CORESET, and/or the number of scheduled PTRS ports. Is the default.

For another example, if the DCI information is included in the DCI, the TCI information is a default indication; for example, the default indication is an all-zero state, but is not limited thereto; that is, the TCI information in the DCI that the terminal device does not expect to receive. The default indications are not the same. The terminal device may receive the PDSCH using the same quasi-co-located (QCL) information as the BFR-specific CORESET, and/or the number of scheduled PTRS ports is a default value.

In one embodiment, when the DCI is carried by the BFR-dedicated CORESET, the number of PTRS ports is a default value if the offset between the DCI and the downlink data channel (eg, PDSCH) is less than a preset threshold. . The default value can be, for example, 1 or it can be another value.

If the offset between the DCI and the downlink data channel is greater than a preset threshold, if the DCI is not included in the DCI, the number of scheduled PTRS ports is the default value; if the DCI The inclusion of TCI information can include the following methods:

For example, the terminal device receives the PDSCH using the quasi-co-located (QCL) information configured in the TCI state indicated by the DCI, and/or the number of scheduled PTRS ports is indicated by the TCI status indicated by the DCI.

For another example, the TCI status indicated by the DCI is a default indication; for example, the default indication is an all-zero state, but is not limited thereto; the terminal device receives the PDSCH by using the same quasi-co-located (QCL) information as the BFR-dedicated CORESET, and / or, the number of scheduled PTRS ports is the default value.

For another example, the TCI status indicated by the DCI is a value other than the default indication, the terminal device receives the PDSCH by using the quasi-colocated information configured in the TCI status indicated by the DCI, and/or the number of scheduled PTRS ports is The TCI status indication indicated by the DCI.

It is to be noted that the above only exemplifies the processing of the number of PTRS ports by the terminal device side in the case of BFR, but the present invention is not limited thereto. Further, for the network device side, processing can be performed correspondingly or similarly.

In addition, the present embodiment may be separately implemented by the terminal device or the network device, or may be combined with the embodiments of the above or below embodiments; for example, may be combined with one or more of the various embodiments. .

Example 4

Embodiments of the present invention provide an information determining apparatus. The device may be, for example, a terminal device or a component or component of the terminal device. The same contents of the fourth embodiment and the first embodiment will not be described again.

FIG. 6 is a schematic diagram of an information determining apparatus according to an embodiment of the present invention. As shown in FIG. 6, the information determining apparatus 600 includes:

The information determining unit 601 determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation The number of port groups for the reference signal.

In an embodiment, as shown in FIG. 6, the information determining apparatus 600 may further include:

The information receiving unit 602 receives downlink control information sent by the network device, where the downlink control information is used to indicate at least a port group number of the scheduled demodulation reference signal.

In an embodiment, as shown in FIG. 6, the information determining apparatus 600 may further include:

a signal receiving unit 603 that receives the phase tracking reference signal based on at least a number of ports of the scheduled phase tracking reference signal;

The data receiving unit 604 receives the downlink data channel based on at least the downlink control information.

In one embodiment,

The port of the scheduled demodulation reference signal is used to transmit a demodulation reference signal for demodulating the downlink data channel.

In one embodiment, the demodulation reference signal, the downlink data channel, and the scheduled phase tracking reference signal are transmitted in the same time interval; the time interval includes at least one of: a time slot, a subframe , frame; however, the invention is not limited thereto.

It is to be noted that the above description has been made only for the respective components or modules related to the present invention, but the present invention is not limited thereto. The information determining apparatus 600 may also include other components or modules, and for the specific content of these components or modules, reference may be made to related art.

In an embodiment, the information determining unit 601 can be used to:

Determining that the number of ports of the scheduled phase tracking reference signal is equal to the scheduled demodulation if the number of port groups of the scheduled demodulation reference signal is less than the number of ports of the indicated phase tracking reference signal The number of port groups of the reference signal, or the number of port groups for which the scheduled demodulation reference signal is not expected to be less than the number of ports of the scheduled phase tracking reference signal.

In an embodiment, in a case where the offset between the downlink control information and the downlink data channel is less than a preset threshold, the number of ports of the phase tracking reference signal is indicated by a default manner and/or the downlink data is received. Quasi-homogenous information of the channel.

In an embodiment, the information determining unit 601 can be used to:

Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the default mode, or that the number of port groups of the scheduled demodulation reference signal is not expected to be less than The default mode indicates the number of ports of the phase tracking reference signal.

In an embodiment, the default mode includes indication by the transmission configuration indication state configuration information, the transmission configuration indication parameter included in the state configuration information indicating the number of ports of the phase tracking reference signal is configured as 1 .

In an embodiment, in a case that the offset between the downlink control information and the downlink data channel is greater than or equal to a preset threshold, the transmission configuration indication state of the control resource set where the downlink control information is scheduled is scheduled. To indicate the number of ports for the phase tracking reference signal.

In an embodiment, the information determining unit 601 can be used to:

Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the transmission indication state, or the number of port groups for which the scheduled demodulation reference signal is not expected Less than the number of ports of the phase tracking reference signal indicated by the transmission indication state.

In one embodiment, one or more transmission configuration indications for the set of control resources configured for the terminal device indicate that the parameter included in the state for indicating the number of ports of the phase tracking reference signal is configured to be 1 or not configured. .

In one embodiment, the default mode includes being indicated by a predetermined default value, and/or the parameters of the default mode are independent of the transmission configuration indication state configuration information of the default control resource set.

In an embodiment, in a case that the offset between the downlink control information and the downlink data channel is less than a preset threshold, the default parameter is indicated by a transmission configuration indication state, where the transmission configuration indication state includes the following At least one:

Receiving an activated transmission configuration indication state of a control resource set with the smallest or largest number in the current time slot of the scheduled downlink data channel;

Receiving, in a current time slot of the scheduled downlink data channel, an activated transmission configuration indication state that includes a minimum or maximum number of control resource sets in one or more control resource sets of the search space;

The activated transmission configuration indication state of the control resource set with the smallest or largest number in the time slot in which the downlink control information is located;

The time slot in which the downlink control information is located includes an activated transmission configuration indication state of a control resource set with the smallest or largest number among one or more control resource sets in the search space;

The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that is successfully received in the time slot in which the downlink control information is successfully received last time;

The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that successfully received the last successful reception of a certain downlink control information;

The transmission configuration indication state adopted by the last successfully received downlink data channel;

On the carrier where the scheduled downlink data channel is located, the transmission configuration configured or activated by the higher layer signaling indicates the transmission configuration indication state with the smallest or largest number in the state;

In the case that the downlink data channel is scheduled on a certain carrier, the transmission configuration indication state indicated by the downlink control information of the downlink data channel on the carrier that was successfully received last time is successfully received.

In one embodiment, the number of ports of the indicated phase tracking reference signal is indicated by a transmission configuration indication state.

In one embodiment, the number of ports of the indicated phase tracking reference signal is indicated by the number of phase tracking reference signal ports in the transmission configuration indication state configuration information, and the reference signal set of the transmission configuration indicating state configuration information Equal in number;

Alternatively, the number of ports of the phase tracking reference signal is determined according to the number of reference signal sets.

It is to be noted that the above embodiments are merely illustrative of the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the above respective embodiments. For example, each of the above embodiments may be used alone, or one or more of the above respective embodiments may be combined.

Moreover, for the sake of simplicity, only the connection relationship or signal direction between the various components or modules is exemplarily shown in FIG. 6, but it should be clear to those skilled in the art that various related technologies such as bus connection can be employed. The above various components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, a receiver, etc.; the implementation of the present invention is not limited thereto.

According to the foregoing embodiment, the terminal device determines the number of scheduled PTRS ports according to the number of scheduled DMRS port groups, where the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. Therefore, the terminal device does not decode the PTRS larger than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with the scheduling of the network device, thereby not causing the scheduling of the network device to lose flexibility, and the resources can be reduced or avoided. Waste and energy consumption.

Example 5

Embodiments of the present invention provide an information determining apparatus. The device may be, for example, a network device or some or some of the components or components of the network device. The same contents of the fifth embodiment and the second embodiment will not be described again.

FIG. 7 is a schematic diagram of an information determining apparatus according to an embodiment of the present invention. As shown in FIG. 7, the information determining apparatus 700 includes:

The information determining unit 701 determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation The number of port groups for the reference signal.

In an embodiment, as shown in FIG. 7, the information determining apparatus 700 may further include:

The information sending unit 702 sends downlink control information to the terminal device, where the downlink control information is used at least to indicate the number of port groups of the scheduled demodulation reference signal.

In an embodiment, as shown in FIG. 7, the information determining apparatus 700 may further include:

a signal transmitting unit 703 that transmits the phase tracking reference signal based on at least a port number of the scheduled phase tracking reference signal;

The data transmitting unit 704 transmits the data in the downlink data channel to the terminal device.

It is to be noted that the above description has been made only for the respective components or modules related to the present invention, but the present invention is not limited thereto. The information determining apparatus 700 may also include other components or modules, and for the specific content of these components or modules, reference may be made to related art.

Moreover, for the sake of simplicity, only the connection relationship or signal direction between the various components or modules is exemplarily shown in FIG. 7, but it should be clear to those skilled in the art that various related technologies such as bus connection can be employed. The above various components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, a receiver, etc.; the implementation of the present invention is not limited thereto.

As can be seen from the foregoing embodiment, the network device determines the number of scheduled PTRS ports according to the number of scheduled DMRS port groups; the number of scheduled PTRS ports is less than or equal to the number of scheduled DMRS port groups. Therefore, the terminal device does not decode the PTRS larger than the number of scheduled DMRS port groups, and the number of decoded PTRSs can be consistent with the scheduling of the network device, thereby not causing the scheduling of the network device to lose flexibility, and the resources can be reduced or avoided. Waste and energy consumption.

Example 6

The embodiment of the present invention further provides a communication system. Referring to FIG. 1, the same contents as Embodiments 1 to 5 are not described herein. In this embodiment, the communication system 100 can include:

a network device 101 configured with the information determining apparatus 700 as described in Embodiment 4;

The terminal device 102 is configured with the information determining device 600 as described in Embodiment 3.

The embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited thereto, and may be other network devices.

FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in FIG. 8, network device 800 can include a processor 810 (eg, a central processing unit CPU) and memory 820; and memory 820 is coupled to processor 810. The memory 820 can store various data; in addition, a program 830 for information processing is stored, and the program 830 is executed under the control of the processor 810.

For example, the processor 810 can be configured to execute the program 830 to implement the information determining method as described in embodiment 2. For example, the processor 810 can be configured to perform control of determining the number of ports of the scheduled phase tracking reference signal based on the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than Or the number of port groups equal to the scheduled demodulation reference signal.

In addition, as shown in FIG. 8, the network device 800 may further include: a transceiver 840, an antenna 850, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 800 does not have to include all the components shown in FIG. 8; in addition, the network device 800 may also include components not shown in FIG. 8, and reference may be made to the prior art.

The embodiment of the present invention further provides a terminal device, but the present invention is not limited thereto, and may be other devices.

FIG. 9 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 9, the terminal device 900 can include a processor 910 and a memory 920; the memory 920 stores data and programs and is coupled to the processor 910. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

For example, the processor 910 can be configured to execute a program to implement the information determining method as described in Embodiment 1. For example, the processor 910 can be configured to perform control of determining a number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than Or the number of port groups equal to the scheduled demodulation reference signal.

As shown in FIG. 9, the terminal device 900 may further include: a communication module 930, an input unit 940, a display 950, and a power supply 960. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the terminal device 900 does not have to include all the components shown in FIG. 9, and the above components are not necessary; in addition, the terminal device 900 may further include components not shown in FIG. There are technologies.

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

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the network device to perform the information determining method described in Embodiment 2.

The embodiment of the present invention further provides a computer readable program, wherein the program causes the terminal device to perform the information determining method described in Embodiment 1 when the program is executed in the terminal device.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the terminal device to execute the information determining method described in Embodiment 1.

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

The method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional blocks shown in the figures and/or one or more combinations of the functional blocks may correspond to the various software modules of the computer program flow or to the various hardware modules. These software modules may correspond to the respective steps shown in the figures. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

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

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

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

With regard to the embodiments including the above embodiments, the following supplementary notes are also disclosed:

Attachment 1, a method for determining information, including:

Determining, by the terminal device, a number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation reference signal The number of port groups.

The method of claim 1, wherein the method further comprises:

The terminal device receives downlink control information sent by the network device, where the downlink control information is used to indicate at least a port group number of the scheduled demodulation reference signal.

The method of claim 1 or 2, wherein the method further comprises:

The terminal device receives the phase tracking reference signal based on at least a number of ports of the scheduled phase tracking reference signal;

The terminal device receives the downlink data channel based on at least the downlink control information.

The method of any one of the preceding claims 1 to 3, wherein the method comprises:

Determining that the number of ports of the scheduled phase tracking reference signal is equal to the scheduled demodulation if the number of port groups of the scheduled demodulation reference signal is less than the number of ports of the indicated phase tracking reference signal The number of port groups of the reference signal, or the number of port groups for which the scheduled demodulation reference signal is not expected to be less than the number of ports of the scheduled phase tracking reference signal.

The method of any one of clauses 1 to 4, wherein, in the case where the offset between the downlink control information and the downlink data channel is less than a preset threshold, the phase tracking reference signal is indicated by a default mode. The number of ports and/or the quasi-co-located information of the downlink data channel.

The method of claim 5, wherein the method comprises:

Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the default mode, or that the number of port groups of the scheduled demodulation reference signal is not expected to be less than The default mode indicates the number of ports of the phase tracking reference signal.

The method of claim 5, wherein the default mode comprises indication by a transmission configuration indication state configuration information, the transmission configuration indication state state information included in the state configuration information for indicating the phase tracking reference signal The parameter number of the port is configured as 1.

The method of any one of clauses 1 to 4, wherein, in the case that the offset between the downlink control information and the downlink data channel is greater than or equal to a preset threshold, scheduling the downlink control information The transmission configuration indication status of the set of control resources is to indicate the number of ports of the phase tracking reference signal.

The method of claim 8, wherein the method comprises:

Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the transmission indication state, or the number of port groups for which the scheduled demodulation reference signal is not expected Less than the number of ports of the phase tracking reference signal indicated by the transmission indication state.

The method of any one of clauses 1 to 9, wherein one or more transmission configuration indications of the set of control resources configured for the terminal device include states for indicating the phase tracking reference The parameter of the number of ports of the signal is configured to be 1 or not configured.

The method of claim 5, wherein the default mode comprises being indicated by a predetermined default value, and/or the parameter of the default mode is independent of a transmission configuration indication of the default control resource set. information.

Supplementary note 12 is an information determining method, wherein the transmission configuration indication state includes at least one of the following:

Receiving an activated transmission configuration indication state of a control resource set with the smallest or largest number in the current time slot of the scheduled downlink data channel;

Receiving, in a current time slot of the scheduled downlink data channel, an activated transmission configuration indication state that includes a minimum or maximum number of control resource sets in one or more control resource sets of the search space;

The activated transmission configuration indication state of the control resource set with the smallest or largest number in the time slot in which the downlink control information is located;

The time slot in which the downlink control information is located includes an activated transmission configuration indication state of a control resource set with the smallest or largest number among one or more control resource sets in the search space;

The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that is successfully received in the time slot in which the downlink control information is successfully received last time;

The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that successfully received the last successful reception of a certain downlink control information;

The transmission configuration indication state adopted by the last successfully received downlink data channel;

On the carrier where the scheduled downlink data channel is located, the transmission configuration indication state configured by the higher layer signaling or activated indicates the state of the transmission configuration indication with the smallest or largest number in the state;

In the case that the downlink data channel is scheduled on a certain carrier, the transmission configuration indication state indicated by the downlink control information of the downlink data channel on the carrier that was successfully received last time is successfully received.

Supplementary note 13, an information determining method, wherein the number of ports of the phase tracking reference signal is indicated by a transmission configuration indication state.

The method of claim 13, wherein the number of ports of the indicated phase tracking reference signal is indicated by a number of phase tracking reference signal ports in the transmission configuration indication state configuration information, and the transmission configuration The number of reference signal sets indicating the status configuration information is equal;

Alternatively, the number of ports of the phase tracking reference signal is determined according to the number of reference signal sets.

Appendix 15, a method for determining information, including:

The network device determines a number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled demodulation reference signal The number of port groups.

The method of claim 15, wherein the method further comprises:

The network device sends downlink control information in the downlink control channel to the terminal device, where the downlink control information is used to schedule the downlink data channel;

The network device transmits data in the downlink data channel to the terminal device.

Supplementary note 17, an information determining method, wherein, in the case that the downlink control information is carried by the beam failure recovery dedicated control resource set, the scheduled phase tracking is performed before the terminal device receives the high layer signaling activation transmission configuration indication state The number of ports for the reference signal is the default.

Supplementary note 18 is an information determining method, wherein the downlink control information is carried by the beam failure recovery dedicated control resource set, and the offset between the downlink control information and the scheduled downlink data channel is less than a preset threshold. In this case, the number of ports of the scheduled phase tracking reference signal is the default value.

The method of claim 18, wherein, if the offset between the downlink control information and the downlink data channel is greater than or equal to the preset threshold, if the downlink control information The transmission configuration indication information is not included, and the number of ports of the scheduled phase tracking reference signal is the default value.

The method of claim 18 or 19, wherein, if the downlink control information includes transmission configuration indication information, the terminal device adopts a configuration in the transmission configuration indication state indicated by the downlink control information The parity information receives the downlink data channel, and/or the number of ports of the scheduled phase tracking reference signal is indicated by a transmission configuration indication state indicated by the downlink control information.

Supplementary note 21, a method for receiving a phase tracking reference signal, comprising:

The terminal device determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the port of the scheduled demodulation reference signal Number of groups;

The terminal device receives the phase tracking reference signal based on at least a number of ports of the scheduled phase tracking reference signal.

The method of claim 21, wherein the method further comprises:

The terminal device receives downlink control information sent by the network device, where the downlink control information is used to indicate at least a port group number of the scheduled demodulation reference signal.

The method of claim 21 or 22, wherein the method further comprises:

The terminal device receives indication information from the network device, where the indication information is used to indicate a number of ports of the phase tracking reference signal;

The number of ports of the scheduled phase tracking reference signal is different from the number of ports of the indicated phase tracking reference signal.

The method of any one of clauses 21 to 23, wherein the method further comprises:

The terminal device receives a downlink data channel based on the downlink control information.

Supplementary note 25, a method for transmitting a phase tracking reference signal, comprising:

The network device determines the number of ports of the scheduled phase tracking reference signal according to the number of port groups of the scheduled demodulation reference signal; the number of ports of the scheduled phase tracking reference signal is less than or equal to the port of the scheduled demodulation reference signal Number of groups;

The network device transmits the phase tracking reference signal based at least on a number of ports of the scheduled phase tracking reference signal.

The method of claim 25, wherein the method further comprises:

The network device receives downlink control information that is sent to the terminal device, where the downlink control information is used at least to indicate a number of port groups of the scheduled demodulation reference signal.

The method of claim 25 or 26, wherein the method further comprises:

The network device sends indication information to the terminal device, where the indication information is used to indicate a number of ports of the phase tracking reference signal;

The number of ports of the scheduled phase tracking reference signal is different from the number of ports of the indicated phase tracking reference signal.

The method of any one of clauses 1 to 27, wherein the port of the scheduled demodulation reference signal is used to transmit a demodulation reference signal for demodulating a downlink data channel.

The method of embodiment 28, wherein the demodulation reference signal, the downlink data channel, and the scheduled phase tracking reference signal are transmitted in the same time interval; the time interval includes the following At least one of: time slot, subframe, frame.

Claims (20)

A terminal device comprising: An information determining unit that determines a number of ports of the scheduled phase tracking reference signal according to a number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled solution The number of port groups that adjust the reference signal. The terminal device according to claim 1, wherein the terminal device further comprises: And an information receiving unit, which receives downlink control information sent by the network device, where the downlink control information is used to indicate at least a port group number of the scheduled demodulation reference signal. The terminal device according to claim 1, wherein the terminal device further comprises: a signal receiving unit that receives the phase tracking reference signal based on at least a number of ports of the scheduled phase tracking reference signal; And a data receiving unit that receives the downlink data channel based on at least the downlink control information. The terminal device according to claim 3, wherein the port of the scheduled demodulation reference signal is used to transmit a demodulation reference signal for demodulating the downlink data channel. The terminal device according to claim 4, wherein the demodulation reference signal, the downlink data channel, and the scheduled phase tracking reference signal are transmitted in the same time interval; The time interval includes at least one of the following: a time slot, a subframe, and a frame. The terminal device according to claim 2, wherein the information determining unit is configured to: Determining that the number of ports of the scheduled phase tracking reference signal is equal to the scheduled demodulation if the number of port groups of the scheduled demodulation reference signal is less than the number of ports of the indicated phase tracking reference signal The number of port groups of the reference signal, or the number of port groups for which the scheduled demodulation reference signal is not expected to be less than the number of ports of the scheduled phase tracking reference signal. The terminal device according to claim 2, wherein, in a case where the offset between the downlink control information and the downlink data channel is less than a preset threshold, the number of ports of the phase tracking reference signal is indicated by a default mode and/or Or receiving quasi-co-located information of the downlink data channel. The terminal device according to claim 7, wherein the information determining unit is configured to: Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the default mode, or that the number of port groups of the scheduled demodulation reference signal is not expected to be less than The default mode indicates the number of ports of the phase tracking reference signal. The terminal device according to claim 7, wherein the default mode comprises a status indication indicated by a transmission configuration indicating a number of ports for indicating the phase tracking reference signal included in configuration information of the status indication status The parameter is configured to 1. The terminal device according to claim 2, wherein, when the offset between the downlink control information and the downlink data channel is greater than or equal to a preset threshold, the control resource in which the downlink control information is located is scheduled The aggregated transmission configuration indicates a status to indicate the number of ports of the phase tracking reference signal. The terminal device according to claim 10, wherein the information determining unit is configured to: Determining that the number of port groups of the scheduled demodulation reference signal is greater than or equal to the number of ports of the phase tracking reference signal indicated by the transmission indication state, or the number of port groups for which the scheduled demodulation reference signal is not expected Less than the number of ports of the phase tracking reference signal indicated by the transmission indication state. The terminal device according to claim 2, wherein one or more transmission configuration indicating a set of control resources configured for the terminal device indicates that a parameter included in the state indicating a number of ports of the phase tracking reference signal is configured Is 1 or not configured. The terminal device according to claim 7, wherein the default mode comprises being indicated by a predetermined default value, and/or the parameter of the default mode is independent of a transmission configuration indication state configuration information of a default control resource set. The terminal device according to claim 7, wherein, in a case where an offset between the downlink control information and the downlink data channel is less than a preset threshold, the default parameter is indicated by a transmission configuration indication state, The transmission configuration indication state includes at least one of the following: Receiving an activated transmission configuration indication state of a control resource set with the smallest or largest number in the current time slot of the scheduled downlink data channel; Receiving, in a current time slot of the scheduled downlink data channel, an activated transmission configuration indication state that includes a minimum or maximum number of control resource sets in one or more control resource sets of the search space; The activated transmission configuration indication state of the control resource set with the smallest or largest number in the time slot in which the downlink control information is located; The time slot in which the downlink control information is located includes an activated transmission configuration indication state of a control resource set with the smallest or largest number among one or more control resource sets in the search space; The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that successfully received the downlink control information in the time slot in which the downlink control information is successfully received; The activated transmission configuration indication state of the smallest or largest control resource set among the one or more control resource sets of the downlink control information that successfully received the last successful reception of a certain downlink control information; The transmission configuration indication state adopted by the last successfully received downlink data channel; On the carrier where the scheduled downlink data channel is located, the transmission configuration configured or activated by the higher layer signaling indicates the transmission configuration indication state with the smallest or largest number in the state; In the case that the downlink data channel is scheduled on a certain carrier, the transmission configuration indication state indicated by the downlink control information of the downlink data channel on the carrier that was successfully received last time is successfully received. The terminal device according to claim 6, wherein the number of ports of the indicated phase tracking reference signal is indicated by a transmission configuration indication state. The terminal device according to claim 15, wherein the number of ports of the indicated phase tracking reference signal is indicated by a number of phase tracking reference signal ports in the transmission configuration indication state configuration information, and the transmission configuration indicates a state configuration The number of reference signal sets of information is equal; Alternatively, the number of ports of the phase tracking reference signal is determined according to the number of reference signal sets. A network device, including: An information determining unit that determines a number of ports of the scheduled phase tracking reference signal according to a number of port groups of the scheduled demodulation reference signals; the number of ports of the scheduled phase tracking reference signal is less than or equal to the scheduled solution The number of port groups that adjust the reference signal. The network device of claim 17, wherein the network device further comprises: And an information sending unit that sends downlink control information to the terminal device, where the downlink control information is used to at least indicate a port group number of the scheduled demodulation reference signal. The network device of claim 17, wherein the network device further comprises: a signal transmitting unit that transmits the phase tracking reference signal based on at least a port number of the scheduled phase tracking reference signal; a data transmitting unit that transmits a downlink data channel to the terminal device. A communication system comprising: the terminal device according to claim 1; and the network device according to claim 17.

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