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WO2018171800A1 - Procédé et appareil de traitement de signal de référence - Google Patents

Procédé et appareil de traitement de signal de référence Download PDF

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Publication number
WO2018171800A1
WO2018171800A1 PCT/CN2018/080499 CN2018080499W WO2018171800A1 WO 2018171800 A1 WO2018171800 A1 WO 2018171800A1 CN 2018080499 W CN2018080499 W CN 2018080499W WO 2018171800 A1 WO2018171800 A1 WO 2018171800A1
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WIPO (PCT)
Prior art keywords
reference signal
phase tracking
port
tracking reference
ports
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PCT/CN2018/080499
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English (en)
Chinese (zh)
Inventor
梅猛
蒋创新
鲁照华
陈艺戬
张淑娟
弓宇宏
Original Assignee
中兴通讯股份有限公司
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Publication of WO2018171800A1 publication Critical patent/WO2018171800A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present disclosure relates to the field of communications, for example, to a method and apparatus for processing a reference signal.
  • NR New Radio
  • the use of high frequency bands has become a key research area of NR technology, and with the application of multi-beamforming, multi-user reuse scenarios have also become research. Focus. Since the ability of data demodulation greatly affects the output quality of multi-user transmission, the design of reference signals related to demodulation also affects the ability of data demodulation to a large extent, and there are phase noises in different degrees due to high frequency bands. Or Doppler frequency domain and other factors that seriously affect data demodulation, so the compensation for phase noise or Doppler frequency domain is also the focus of high frequency band research.
  • Phase 3 tracking reference signals have been used for phase noise compensation at the 3rd Generation Partnership Project (3GPP) conference, and there are a variety of flexible design phase tracking reference signal pattern designs.
  • 3GPP 3rd Generation Partnership Project
  • the design of more port demodulation reference signals has been adopted at the 3GPP conference, and the design of the demodulation reference signal has more flexibility. Therefore, in order to achieve more compensation for the phase noise of the demodulation reference signal, it is necessary to More port demodulation reference signals are designed with corresponding phase tracking reference signals.
  • the pattern of the phase tracking reference signal of the single user scenario and the multi-user multiplexing scenario is different, and the design of the phase tracking reference signal of the multi-user multiplexing scenario needs to consider the interference effect on other users.
  • the base station needs to allocate different phase tracking reference signal resources to different users according to the requirements of different phase tracking reference signals of different users.
  • the phase tracking reference signal designed according to the information of the relevant demodulation reference signal cannot effectively avoid the influence of the phase tracking reference signal between multiple users. For more demodulation reference signal ports, The overhead of the phase tracking reference signal cannot be controlled.
  • the embodiment of the invention provides a method and a device for processing a reference signal, which can design a corresponding phase tracking reference signal for specific information of the demodulation reference signal.
  • a method for processing a reference signal including:
  • the first communication node uses the Mth subset of the demodulation reference signal resource to indicate a Mth subset of the phase tracking reference signal resource; wherein the demodulation reference signal resource includes M subsets, M is a positive integer, and The M subsets of the demodulation reference signal resources are transmitted within a frequency domain of each subset of phase tracking reference signal resources.
  • another method for processing a reference signal comprising: configuring, by a first communication node, a phase tracking reference signal resource set for a second communication node; and demodulating the reference signal resource by the first communication node
  • the allocation status indicates the usage of each resource in the phase tracking reference signal resource set; wherein the phase tracking reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, Patterns and how to reuse between ports.
  • a method for processing a reference signal, the phase tracking reference signal hopping on different resources wherein the resource comprises at least one of: a time unit, a frequency domain unit, a port, And precoding.
  • a method for processing a reference signal comprising: a second communication node receiving a phase tracking reference signal resource set configured by a first communication node; and the second communication node receiving the first The indication of the usage of each resource in the phase tracking reference signal resource set by the communication node by demodulating the allocation of the reference signal resource; wherein the reference signal resource includes at least one of the following parameters: port number, port serial number, Time domain density, frequency domain density, pattern, and multiplexing between ports.
  • a processing apparatus for a reference signal which is applied to a first communication node, and includes: a configuration module configured to configure a second communication node phase tracking reference signal resource set; an indication module, setting In order to indicate the usage of each resource in the phase tracking reference signal resource set by demodulating the allocation of reference signal resources; wherein the phase tracking reference signal resource includes at least one of the following parameters: port number, port number, time Domain density, frequency domain density, pattern, and multiplexing between ports.
  • a processing apparatus for providing another reference signal, applied to a first communication node includes: an indication module, configured to use a Mth subset of demodulation reference signal resources to indicate a phase tracking reference signal resource The Mth subset; wherein the demodulation reference signal resource comprises M subsets, M is a positive integer, and the demodulation reference signal is transmitted in a frequency range of each subset of the phase tracking reference signal resources M subsets of resources.
  • a processing apparatus for a further reference signal which is applied to the second communication node, and includes: a first receiving module, configured to receive a phase tracking reference signal resource set configured by the first communication node; a second receiving module, configured to receive, by the first communications node, an indication of usage of each resource in the phase tracking reference signal resource set by demodulating a distribution of reference signal resources; wherein the phase tracking reference signal
  • the resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing between ports.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps:
  • the usage of each resource within the set of phase tracking reference signal resources is indicated by the allocation of demodulation reference signal resources.
  • An embodiment of the present invention provides a method and a device for processing a reference signal, where a first communication node is configured to provide a second communication node with a phase tracking reference signal resource set; and the first communication node indicates by using a demodulation reference signal resource.
  • the phase tracking uses the usage of each resource in the reference signal resource set; wherein the demodulation reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and port.
  • FIG. 1 is a flow chart of a method for processing a reference signal according to an embodiment of the present invention
  • FIG. 2 is a flow chart of another method for processing a reference signal according to an embodiment of the present invention.
  • FIG. 3 is a structural block diagram of a processing device for a reference signal according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of another apparatus for processing a reference signal according to an embodiment of the present invention.
  • FIG. 5a is a diagram showing a zero power phase tracking reference signal in the embodiment of the present invention.
  • FIG. 5b is a schematic diagram of a zero power phase tracking reference signal according to an embodiment of the present invention.
  • 5c is a mapping diagram of phase tracking reference signals of different subsets of an embodiment of the present invention.
  • FIG. 5d is a schematic diagram of a port set of a phase tracking reference signal according to an embodiment of the present invention.
  • 5e is a schematic diagram of a phase tracking reference signal pattern of different densities according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of usage of PTRS resources outside a PTRS resource set according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of cross mapping of a subset of PTRS ports according to an embodiment of the present invention.
  • Figure 10a is a PTRS pattern a of a non-port set indication according to an embodiment of the present invention.
  • Figure 10b is a PTRS pattern b indicating a non-port set indication according to an embodiment of the present invention
  • 11 is a phase tracking reference signal pattern of different densities according to an embodiment of the present invention.
  • 13 is a PTRS pattern of the terminal 1 according to an embodiment of the present invention.
  • Figure 14a is a PTRS pattern a of an embodiment of the present invention.
  • Figure 14b is a PTRS pattern b of an embodiment of the present invention.
  • 15 is a PTRS pattern corresponding to a multi-column DMRS according to an embodiment of the present invention
  • FIG. 16 is a diagram corresponding to an orthogonal port DMRS according to Embodiment 12 of the present invention.
  • FIG. 17a is a PTRS pattern of occupying 7 time domain symbols in each subframe according to an embodiment of the present invention.
  • 17b is a PTRS pattern in which a DMRS does not occupy 12 subcarriers in each PRB according to an embodiment of the present invention
  • 18 is a diagram showing eight ports of reference signals in an embodiment of the present invention.
  • 18a is a sequence diagram of a phase tracking reference signal port according to an embodiment of the present invention.
  • 19 is a sequence diagram of four phase tracking reference signal ports according to an embodiment of the present invention.
  • FIG. 20 is a schematic diagram of ports of a phase tracking reference signal corresponding to different demodulation reference signal ports on different time units according to an embodiment of the present invention
  • Figure 21 is a diagram of hopping on different slots or sub-bands in accordance with an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for processing a reference signal according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 the first communication node is configured to provide a second communication node phase tracking reference signal resource set.
  • the set of phase tracking reference signal resources may be configured by higher layer signaling.
  • Step S104 the first communication node indicates the usage of each resource in the phase tracking reference signal resource set by demodulating the allocation condition of the reference signal resource.
  • the phase tracking reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing mode between ports.
  • the reference signal resources include phase tracking reference signal resources and demodulation reference signal resources.
  • the first communication node is configured to the second communication node phase tracking reference signal resource set; the first communication node indicates each of the phase tracking reference signal resource sets by demodulating the allocation of the reference signal resource The use of the resource; wherein the demodulation reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing mode between ports, which solves the related art.
  • the technical problem of the corresponding phase tracking reference signal cannot be designed for the specific information of the demodulation reference signal.
  • FIG. 2 is a flowchart of another method for processing a reference signal according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 the second communication node receives the phase tracking reference signal resource set configured by the first communication node
  • Step S204 The second communication node receives an indication that the first communication node uses the allocation of the demodulated reference signal resource to the usage of each resource in the phase tracking reference signal resource set.
  • the phase tracking reference signal resource includes At least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing between ports.
  • the phase tracking reference signal may also be referred to as a phase noise reference signal, or a reference signal for phase tracking or phase compensation.
  • This embodiment further provides another method for processing a reference signal, including:
  • the first communication node uses the Mth subset of the demodulation reference signal resource to indicate a Mth subset of the phase tracking reference signal resource; wherein the demodulation reference signal resource includes M subsets, M is a positive integer, and The M subsets of the demodulation reference signal resources are transmitted within a frequency domain of each subset of phase tracking reference signal resources.
  • the first communication node uses the first subset of the demodulation reference signal resources to indicate a first subset of the phase tracking reference signal resources, and to use the Mth sub-module of the demodulation reference signal resource a set of Mth segments indicating the phase tracking reference signal resource, wherein the demodulation reference signal resource comprises M subsets, and the frequency domain is transmitted in each subset frequency domain of the phase tracking reference signal resource Demodulate M subsets of reference signal resources.
  • M is a positive integer.
  • the ports of the M subsets of the demodulation reference signal resources are code division multiplexed in the time domain or time division multiplexed in the time domain, and ports of the M subsets of the phase tracking reference signal resources Frequency division multiplexing.
  • the ports of the M subsets of the demodulation reference signal resources when the ports of the M subsets of the demodulation reference signal resources are time division multiplexed in the time domain, the ports of the M subsets of the demodulation reference signal resources occupy different time domain symbols.
  • different second communication nodes may correspond to phase tracking reference signals of different port numbers.
  • the time domain frequency domain density of each phase tracking reference signal or each set of phase tracking reference signals within the set of phase tracking reference signal resources is configured by the first communication node.
  • the execution body of the foregoing steps may be a base station or the like, but is not limited thereto.
  • the first communication node transmits or receives data on a phase tracking reference signal resource outside of the set of phase tracking reference signal resources.
  • the first communication node does not transmit a signal or transmit a reference signal of zero power on the phase tracking reference signal resource outside the set of phase tracking reference signal resources.
  • the phase tracking reference signal resource set when the number of ports of the demodulation reference signal resource is greater than the first threshold, the phase tracking reference signal resource set is not enabled, or the number of ports of the demodulation reference signal resource is less than the second. At the threshold, the phase tracking reference signal resource set is enabled.
  • the first communication node when the phase tracking reference signal resource set is enabled, notifies the second communication node with the phase tracking reference signal resource set by using indication signaling of the demodulation reference signal resource.
  • the non-zero power phase tracking reference signal transmission resource when the phase tracking reference signal resource set is enabled, notifies the second communication node with the phase tracking reference signal resource set by using indication signaling of the demodulation reference signal resource.
  • the first communication node transmits a phase tracking reference signal of non-zero power and zero power within the set of phase tracking reference signal resources.
  • the first communication node is configured to the second communication node phase tracking reference signal resource set, the first communication node notifying the second communication node of the position of the phase tracking reference signal resource set by using the dynamic signaling, where
  • the dynamic signaling includes at least one of the following: quasi co-located QCL indication information, scrambling sequence, and physical layer dynamic signaling.
  • the first communication node is configured to the second communication node
  • the number of ports included in the phase tracking reference signal resource set is the number of ports using the phase tracking reference signal, or according to the phase tracking reference signal port number and demodulation reference
  • the ratio value of the number of signal ports is calculated, and the number of the demodulation reference signal ports is an integer greater than or equal to 1. If the number of ports of the demodulation reference signal is 8, and the P value is configured to be 1/2, the number of ports that can obtain the phase tracking reference signal is 4.
  • the time domain frequency domain density of each phase tracking reference signal or each set of phase tracking reference signals within the set of phase tracking reference signal resources is configurable, such as a first communication node configuration.
  • the set of phase tracking reference signal resources comprises: a predefined resource configuration.
  • the set of phase tracking reference signal resources is mapped by the first communication node to different sets of resources by means of a bitmap bitmap.
  • the embodiment further provides a method for processing a reference signal, including: the phase tracking reference signal hopping on different resources, wherein the resource includes at least one of the following: a time unit, a frequency domain unit, a port, and a precoding. the way.
  • the relative position of the pattern of the phase tracking reference signal is associated with the sequence number of the time unit or the frequency domain unit.
  • the rules for phase tracking reference signal resource hopping are different for different first communication nodes or second communication nodes.
  • the N demodulation reference signal ports are associated with one phase tracking reference signal port, there are N types of precoding methods for the phase tracking reference signals, wherein an error! The reference source was not found.
  • the first communication node respectively configures a correspondence relationship between the demodulation reference signal port and the phase tracking reference signal port for different time units or different frequency domain units; wherein the phase tracking reference signal port and the demodulation reference signal port
  • the corresponding relationship is that the phase tracking reference signal port and the demodulation reference signal port use the same precoding mode, and the correspondence between the phase tracking reference signal port and the demodulation reference signal port is related to the sequence number of the time unit or the frequency domain unit.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM or RAM, a disk,
  • a storage medium such as ROM or RAM, a disk
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.
  • the embodiment of the present invention provides a processing device for a reference signal, which is used to implement the foregoing embodiments and implementation manners, and has not been described again.
  • the term "module” may implement a combination of at least one of software and hardware for a predetermined function.
  • the devices described in the following embodiments are implemented in software, hardware, or a combination of software and hardware, is also possible and conceivable.
  • FIG. 3 is a structural block diagram of a processing apparatus for a reference signal according to an embodiment of the present invention, which is applied to a first communication node, as shown in FIG. 3, the apparatus includes:
  • the configuration module 30 is configured to configure a second communication node phase tracking reference signal resource set
  • the indicating module 32 is configured to indicate, by using an allocation condition of the demodulation reference signal resource, a usage of each resource in the phase tracking reference signal resource set;
  • the phase tracking reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing mode between ports.
  • the embodiment further provides another processing device for the reference signal, which is applied to the first communication node, and includes: an indication module, configured to use the Mth subset of the demodulation reference signal resource to indicate the Mth subset of the phase tracking reference signal resource .
  • the demodulation reference signal resource includes M subsets, M is a positive integer, and M subsets of the demodulation reference signal resources are transmitted in a frequency range of each subset of the phase tracking reference signal resources. .
  • the indication module is further configured to use the first subset of the demodulation reference signal resources to indicate a first subset of the phase tracking reference signal resources, and to use the Mth of the demodulation reference signal resources
  • the subset indicates the Mth subset of the phase tracking reference signal resource
  • the demodulation reference signal resource includes M subsets, and each of the subsets of the phase tracking reference signal resources has a frequency domain Describe M subsets of reference signal resources.
  • M is a positive integer.
  • FIG. 4 is a structural block diagram of another apparatus for processing a reference signal according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes:
  • the first receiving module 40 is configured to receive a phase tracking reference signal resource set configured by the first communications node;
  • the second receiving module 42 is configured to receive, by the first communications node, an indication of the usage of each resource in the phase tracking reference signal resource set by demodulating the allocation of the reference signal resource;
  • the phase tracking reference signal resource includes at least one of the following parameters: port number, port number, time domain density, frequency domain density, pattern, and multiplexing mode between ports.
  • the first communication node transmits or receives data on a phase tracking reference signal resource outside of the set of phase tracking reference signal resources.
  • the first communication node does not transmit a signal or transmit a reference signal of zero power on the phase tracking reference signal resource outside the set of phase tracking reference signal resources.
  • the different second communication nodes correspond to phase tracking reference signals of different port numbers.
  • the phase tracking reference signal resource set when the number of ports of the demodulation reference signal resource is greater than the first threshold, the phase tracking reference signal resource set is not enabled, or when the number of ports of the demodulation reference signal resource is less than the second threshold, the phase tracking reference is used. Signal resource collection is enabled.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are arbitrary.
  • the combined forms are located in different processors.
  • the embodiment provides a method and a device for designing a phase tracking reference signal, which relates to a plurality of resource sets, patterns, time-frequency domain densities, port multiplexing modes, and port number thresholds of the phase tracking reference signal, which can be solved. Details of the design of phase tracking reference signals when multi-user multiplexing.
  • the definition of the NR according to the 3GPP includes a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS), and other signaling or names are the same as the Long Term Evolution ( The Long Term Evolution (LTE) is consistent.
  • the Radio Resource Contro (RRC) signaling in all the embodiments may also be a MAC Control Element (MAC CE) and downlink control information (Downlink Control).
  • MAC CE MAC Control Element
  • Downlink Control Downlink Control
  • Information, DCI) and other signaling, and the DMRS and PTRS patterns and port resource sets are mainly examples in one physical resource block (PRB).
  • PRB physical resource block
  • a user serving the same base station determines whether PTRS compensation is required according to a Modulation and Coding Scheme (MCS) level, and when the MCS level is high, for example, 256-phase quadrature amplitude modulation ( In Quadrature Amplitude Modulation (QAM) or higher modulation mode, the user needs PTRS for phase compensation, which can better perform data demodulation and improve spectral efficiency.
  • MCS Modulation and Coding Scheme
  • QAM Quadrature Amplitude Modulation
  • Users with lower MCS level can perform phase compensation without PTRS. Because the MCS level is higher, the transmission information is more sensitive to the influence of the RF antenna crystal oscillator. When the MCS level is lower, the impact is not significant. Therefore, phase compensation is more needed when the MCS level is higher. And as the center frequency increases, the user is more affected by phase noise. Therefore, in the high frequency band, phase compensation using PTRS can improve user spectrum efficiency.
  • MCS Modulation and Coding Scheme
  • the base station and each user transmit information using multiple radio frequency antennas, the crystal oscillator of each antenna has a certain difference, and each user's MCS level is not the same, so each user The PTRS needs are different.
  • the PTRS demand situation is expressed as whether PTRS, the number of ports of the PTRS, and the pattern corresponding to each PTRS port are required, and these parameters show a certain degree of difference. Therefore, the base station needs to confirm whether it is necessary to perform PTRS phase compensation for one or several users according to the PTRS requirement of each user.
  • the user determines whether there is a zero-power PTRS at this time according to the layer information sent by the base station. If the layer number information is greater than a certain value (in the case of LTE, this value is 2), and in this case, a single-user scenario, there is no zero-power PTRS. As shown in FIG. 5a, FIG. 5a shows a zero power phase tracking reference signal pattern in the embodiment of the present invention. If the layer information is smaller than a certain value at this time, it can be processed in a multi-user scenario. If there are multiple users who need PTRS for phase compensation, then there is zero power PTRS and non-zero power PTRS. As shown in Figure 5b, there is a zero power phase tracking reference signal pattern in Figure 5b.
  • the number of layers allocated by the base station side when the number of layers allocated by the base station side is greater than 2, it is considered to be a single-user scenario; when the number of layers allocated by the base station side is less than or equal to 2, the number of DMRS ports allocated according to the base station side Can judge.
  • the number of DMRS ports When the number of DMRS ports is large, it can be considered as a multi-user multiplexing scenario.
  • the number of DMRS ports is small (for example, equal to the number of layers 2), it may be considered as a single-user scenario or a multi-user multiplexing scenario, because there may be certain Non-orthogonal DMRS ports, but can be processed at this time in a multi-user multiplexing scenario.
  • the base station sets a maximum PTRS port number reference coefficient P according to the number of PTRSs required by multiple users, and the P value represents a ratio of the number of phase tracking reference signal ports set by the base station to the number of demodulation reference signal ports.
  • RRC radio resource control
  • the maximum number of PTRS ports is N.
  • the base station side sets a certain number of PTRS port sets, each set containing a different PTRS port.
  • Each set of sets represents the demand situation of PTRS in different scenarios, and according to the set maximum number of PTRS ports mentioned above, the maximum number of ports in each set of PTRS port sets is N, which may exist.
  • a collection of ports smaller than N. For example, according to N 4, the number of PTRS ports per group in the port set of the PTRS configured by the RRC through the RRC may be selected to be at most 4.
  • the mapping of the PTRS directly affects the mapping relationship of the PTRS port set. .
  • the ports of the DMRS corresponding to the same subcarrier position are not the same in different time domain symbol positions, it is considered that there are different subsets, and the number of DMRSs of different ports corresponding to each port in the frequency domain may be referred to as one frequency domain transmission. cycle.
  • the PTRS ports corresponding to different subsets are distinguished by different subcarrier positions, and the first subset of PTRSs are transmitted in the first frequency domain transmission period, and are in the second frequency domain transmission period.
  • the PTRS of the second subset is transmitted, and so on, until all PTRS transmissions are completed.
  • FIG. 5c is a mapping relationship diagram of phase tracking reference signals of different subsets of the embodiment of the present invention.
  • the PTRS port can be configured by the base station through RRC to [1, 2, 3, 5 ].
  • the two DMRSs cannot share the same PTRS port.
  • the two DMRS ports do not use the same antenna to transmit information on the same antenna of the same base station, or the crystal oscillators between the two antennas used are different, and the user equipment ( User Equipment (UE) has a higher MCS level (for example, 256QAM), so this UE needs to occupy two PTRS ports.
  • FIG. 5d is a schematic diagram of a port set of a phase tracking reference signal according to an embodiment of the present invention.
  • the PTRS port can be in one-to-one correspondence with the DMRS port, that is, the same port of the PTRS and the DMRS occupy the same subcarrier.
  • user 1 occupies two PTRS ports, and there are two other users. Each user corresponds to one PTRS port.
  • port 1 and port 2 for user 1 according to the configuration of the port set. Both users are configured with port 3 and port 5 respectively.
  • the resource set may use a resource map mapping.
  • the base station configures four PTRS ports through RRC, and there are eight DMRS ports, and the content of the resource mapping (bitmap) is [1]. 1,1,0,1,0,0,0], where 1 indicates the intra-subcarrier transmission PTRS corresponding to the DMRS port, and 0 indicates the subcarrier transmission data corresponding to the DMRS port.
  • the PTRS pattern assigned to each user may indicate the PTRS location, zero power location, and data location of the user by the mapping result of the above resource map and the port correspondence information of the PTRS port set.
  • User 1, User 2, and User 3 are configured with PTRS port 1 and port 2, port 3, and port 5, respectively, corresponding to DMRS port 1 and port 2, port 3, and port 5, respectively, according to resource mapping (bitmap) mapping.
  • the correspondence between the content and the DMRS port is taken as an intersection, that is, the intersection of the PTRS port and the resource map of the user 1 is obtained as the first two PTRS ports, so that the four subcarrier positions corresponding to the user 1PTRS port can be obtained, and the port 1 and The subcarrier position corresponding to port 2 is a non-zero power reference signal, and the remaining two subcarrier positions are zero power positions; similarly, for user 2, the corresponding resource mapping (bitmap) and the subcarrier of port 3 of the PTRS intersection can be obtained.
  • the remaining three ports are zero power ports; similarly, for user 3, the corresponding resource mapping (bitmap) and the PTRS intersection of port 5 subcarriers are non-zero power ports, and the remaining three ports are Zero power port.
  • the base station may configure parameters to indicate the time-frequency domain density of the PTRS through RRC or DCI signaling, for example, the default time domain density is 1.
  • the density of the PTRS is processed in accordance with the entire time domain symbol. If the PTRS density is not 1, the user can be notified by DCI to send 1 bit information, and the density of the PTRS corresponding to the port in the time domain is 1/2 or 1/4 of the density when the entire time domain symbol is occupied.
  • the same frequency domain density can be mapped in a similar way.
  • the time-frequency domain density of the DCI notification may be adjusted according to the change of the MCS level, but may not exceed the time-frequency domain density threshold of the high-level signaling. For example, when the time-frequency domain density of a user's PTRS is reduced, DCI signaling notifies the user of the new pattern. Since the time-frequency domain resources occupied by the PTRS are reduced, the user can send data on the changed resources, and other users do not make adjustments. If a user's time-frequency domain density increases, DCI signaling does not notify the new pattern, and the user's PTRS still uses the old pattern.
  • the base station collects the ports through RRC signaling, and sends the information to the user according to the mapping relationship of the resource mapping, and performs demodulation of the reference signals and data for the obtained DMRS and PTRS patterns.
  • the base station may inform the user of the new PTRS pattern through DCI signaling, as shown in FIG. 5d.
  • the DCI can inform the user of the density change in the PTRS time domain by using the 1-bit information.
  • FIG. 5e is a schematic diagram of a phase tracking reference signal pattern of different densities according to an embodiment of the present invention.
  • User 2 can transmit half of the symbol number of PTRS and half of the symbol number on the subcarrier corresponding to the DMRS port position, which can improve the spectrum efficiency.
  • the other two users will not receive the relevant signaling, and still occupy the entire time domain symbol according to the RRC configured PTRS port 3, all of which are recorded as zero power PTRS, which can save a part of the overhead without spectrum efficiency. Has a big impact.
  • the first communication node transmits or receives data on a phase tracking reference signal resource outside of the set of phase tracking reference signal resources.
  • the first communication node does not transmit any signal or transmit a reference signal of zero power on the phase tracking reference signal resource outside the set of phase tracking reference signal resources.
  • the PTRS resource set configured by the base station high layer signaling is a subset of all PTRS resources. For example, the number of DMRS ports is eight at this time, and the total number of PTRS resources is eight. If a PTRS resource set is taken as a PTRS resource of the PTRS port [1, 2, 3, 5], then the PTRS port outside the PTRS resource set is [4, 6, 7, 8]. As shown in Figure 5d, the PTRS port [4, 6, 7, 8] location can transmit or receive data. As shown in FIG. 6, FIG. 6 is a schematic diagram of the use of PTRS resources outside the PTRS resource set according to the embodiment of the present invention. No signal or zero-power reference signal may be transmitted at the PTRS port [4, 6, 7, 8].
  • a first communication node indicates a first subset of the phase tracking reference signal resources with a first subset of the demodulation reference signal resources, and indicates the phase tracking reference with an Mth subset of the demodulation reference signal resources The Mth subset of signal resources.
  • the ports of the subset of the demodulation reference signal resources are code division multiplexed or time division multiplexed in the time domain, and the ports of the phase tracking reference signal resources M subsets are frequency division multiplexed.
  • the ports of the M subsets of the demodulation reference signal resources are time division multiplexed in the time domain, the ports of the M subsets occupy different time domain symbols.
  • the value of M can be 2, 3, 4, and the like.
  • the first subset of the DMRS is the DMRS port on the first DMRS symbol bit in the time domain
  • the second subset of the DMRS is the DMRS port on the second DMRS symbol bit in the time domain
  • the subset of the PTRS is the same as the DMRS.
  • the subsets correspond one-to-one, as shown in Figure 5c.
  • the first subset and the second subset of the demodulation reference signal resources are transmitted within a frequency range of each subset of the phase tracking reference signal resources.
  • resources within each subset of PTRS may correspond to DMRS port resources within multiple subsets of the DMRS.
  • the DMRS ports occupying the same subcarrier correspond to port resources in different PTRS subsets, and all ports in each DMRS port subset have corresponding PTRS ports corresponding thereto. This is a more flexible design method for PTRS port patterns.
  • FIG. 7 is a schematic diagram of a cross mapping of a subset of PTRS ports according to an embodiment of the present invention.
  • each of the two subsets of the DMRS includes four DMRS ports, which are mapped at different PTRS port locations. For example, 2 ports within the first subset of DMRS can be mapped into a second subset of PTRS.
  • DMRS port 1 and port 2, port 3, and port 4 correspond to the same user, and the two DMRS ports corresponding to each user can be used as the Orthogonal Covering Code (OCC) in the frequency domain, then DMRS at this time.
  • Port 1 and port 2 can be phase compensated without corresponding two PTRSs.
  • the vacated DMRS2 port can be used by other users, for example, can be provided to a user corresponding to the DMRS port 7.
  • the PTRS resources of 4 users can be transmitted in the first port subset of the PTRS.
  • Port 2 in the first subset of DMRS may be transmitted in the frequency domain corresponding to the second subset of PTRS, or DMRS port 2 may not be selected to have PTRS phase compensation, and does not correspond to any PTRS port.
  • the port of the first subset of the demodulation reference signal resources and the port of the second subset are code division multiplexed or time division multiplexed in the time domain, and the first phase of the phase tracking reference signal resource
  • the set port and the second subset of ports are frequency division multiplexed.
  • the ports in the first subset of the DMRS and the ports in the second subset are time division multiplexed.
  • DMRS port 1 is a port in the first subset of DMRS
  • port 5 is a port in the second subset of DMRS
  • the number of these two ports is time-division.
  • the two ports are respectively configured with PTRS port 1 and port 5
  • PTRS port 1 corresponds to the DMRS port 1 and port 5 positions of the first frequency domain transmission period
  • PTRS port 5 corresponds to the DMRS port of the first frequency domain transmission period. 1 and port 5 position.
  • the allocated PTRS port 1 and port 5 respectively correspond to the first subset of PTRS and the second subset of PTRS, and PTRS port 1 and port 5 are frequency division multiplexing. In this case, it can be ensured that the two DMRS ports corresponding to the same subcarrier position are both There may be a corresponding PTRS for phase compensation.
  • FIG. 8 is a PTRS pattern corresponding to a code division multiplexed DMRS according to an embodiment of the present invention.
  • DMRS port 1 and port 5 have code division multiplexing, and the DMRS ports of the two terminals of the corresponding code points occupy the same subcarrier position, so the port 1 corresponding to the first subset of the PTRS is configured.
  • the DMRS port 1 and port 5 of the first subset configure port 5 of the second subset of the PTRS corresponding to the DMRS port 1 and port 5 of the second subset of the code points.
  • phase tracking reference signal port numbers are different for different second communication nodes.
  • pseudo-orthogonal DMRS ports for multiple terminals, that is, DMRSs of multiple terminals occupy the same port.
  • orthogonal PTRS correspondence and pseudo-orthogonal DMRS need to be designed.
  • both terminals are assigned DMRS port 1 and port 2, and both terminals need PTRS for phase compensation.
  • the base station is required for these two.
  • the terminal distinguishes the PTRS port.
  • FIG. 9 is a PTRS pattern of two terminals DMRS pseudo-orthogonal according to an embodiment of the present invention.
  • the DMRS port number corresponding to the terminal 1PTRS port set is [1, 2, 3, 4, 5, 6, 7, 8]
  • the DMRS port number corresponding to the terminal 2PTRS set by the base station is [2]. , 1, 4, 3, 5, 7, 6, 8].
  • there is a pseudo-orthogonal terminal and the first port of the mapping and the port in the PTRS resource set corresponding to the DMRS, that is, the PTRS port of the terminal 1 corresponds to the DMRS port 1, and the PTRS port of the terminal 2 corresponds to the DMRS port 2.
  • the phase tracking reference signal resource set is not enabled.
  • the phase tracking reference signal resource set is enabled.
  • the enabling of the PTRS resource set is confirmed according to the demodulation reference signal or the terminal MCS level or the base station RRC signaling.
  • the base station may allocate PTRS resources to the user according to the MCS level of the user or the number of DMRS ports, and may notify the user whether the PTRS resource is allocated by using RRC signaling according to whether there is multi-user multiplexing at this time.
  • the base station can confirm the enable of the PTRS resource set based on the MCS level of the terminal.
  • the threshold value of the number of DMRS ports configured for one user may be set to 2.
  • the number of DMRS ports is greater than 2, it can be considered as a single-user scenario.
  • the base station does not set a PTRS resource set, and the PTRS resource corresponding to the DMRS port can be configured for the user.
  • the number of DMRS ports is less than 2, it is considered that there may be multi-user multiplexing, and the base station triggers the PTRS resource set to be enabled.
  • the user can determine whether the base station side sends the PTRS resource set according to the number of allocated DMRS ports. Or, set the threshold of the number of DMRS ports configured for one user to 4.
  • the number of DMRS ports When the number of DMRS ports is greater than 4, it can be considered as a single-user scenario.
  • the base station does not set a PTRS resource set, and the PTRS resource corresponding to the DMRS port can be configured for the user.
  • the number of DMRS ports is less than 4, it is considered that there may be multi-user multiplexing, and the base station triggers the PTRS resource set to be enabled.
  • the user can determine whether the base station side sends the PTRS resource set according to the number of allocated DMRS ports.
  • the first communication node when the phase tracking reference signal resource set is enabled, notifies the second communication node of the corresponding non-corresponding non-correspondence in the set of phase tracking reference signal resources by using the indication signaling of the demodulation reference signal resource.
  • Zero power phase tracking reference signal transmission resource when the phase tracking reference signal resource set is enabled, the first communication node notifies the second communication node of the corresponding non-corresponding non-correspondence in the set of phase tracking reference signal resources by using the indication signaling of the demodulation reference signal resource.
  • the base station configures the PTRS resource set to the user.
  • the multiplexed multiple users receive the PTRS resource, it determines which PTRS or PTRS is allocated to the user.
  • the base station can use the resources of the DMRS port to indicate.
  • the PTRS resource set configured by the base station at this time is [1, 3, 5, 7], corresponding to the DMRS port [1, 3, 5, 7], and the user 1 is configured with DMRS port 1 and port 2 at this time.
  • the allocation of the DMRS and PTRS port sets it is obtained that the user 1 is assigned a PTRS port 1, and other PTRS ports in the resource set can transmit a zero power reference signal or not transmit any signal.
  • the DMRS ports allocated to User 1 and User 2 are both Port 1 and Port 2, and the set of PTRS port resources allocated by the base station at this time is [1, 2, 3, 5], There are no other instructions at this time.
  • the allocation of the two PTRSs can be distinguished by the method described in Embodiment 5.
  • the base station sends a 1-bit signaling through the DCI to notify the two users of the allocation of the PTRS port 1 and the PTRS port 2, as shown in FIG.
  • the first communication node transmits only non-zero power and zero power phase tracking reference signals within the set of phase tracking reference signal resources.
  • the set of PTRS resources configured by the base station is [1, 2, 3, 4].
  • the PTRS port corresponding to the DMRS port is 1, that is, at the PTRS port [1, 2, 3, 4] in the physical resource block sent by the base station to the user 1 at this time, the PTRS port 1 is non-zero power.
  • PTRS, ports 2, 3, 4 are zero power PTRS. Therefore, only the port 1 of the non-zero power PTRS and the PTRS ports of zero power 2, 3, 4 are transmitted to the user 1 in the PTRS resource set [1, 2, 3, 4] configured by the base station.
  • the PTRS port 2 sent by the base station to user 2 is a non-zero power PTRS, and the other three ports send zero-power PTRS.
  • the base station transmits a reference signal of non-zero power on the PTRS corresponding to the user, and transmits a zero-power PTRS on other ports in the resource set.
  • the first communication node configures, by the higher layer signaling, a plurality of phase tracking reference signal resource sets to the second communication node, and the first communication node notifies the second communication node by using dynamic signaling of at least one of: Resource collection.
  • QCL Quasi co-location
  • the base station is configured with multiple PTRS resource sets, and the base station can allocate QCL information, similar to LTE data rate matching and Quasi-Co-Location Indicator (PQI), for different QCLs, and can be allocated. Different sets of PTRS ports;
  • different DMRS ports have different PTRS ports corresponding thereto, so the resource set of the PTRS can be notified through the scrambling sequence of the DMRS;
  • the base station may notify the PTRS resource set through DCI signaling, and the different resource sets correspond to different numbers, and may notify the resource set of each number through DCI signaling, and the DCI notifies the terminal by using 1 bit signaling.
  • the set of resource pools sent by the base station is [1, 2, 3, 4].
  • the phase tracking reference signal resource set is configured by the high layer signaling to the number P of ports included in the phase tracking reference signal resource set of the second communication node.
  • the P value is the number of phase tracking reference signal ports used, or the ratio of the number of demodulation reference signal ports, and M is an integer greater than or equal to 1;
  • the P value can be obtained by the number of PTRS ports configured by the base station, whether it is directly configured with the number of PTRS ports or 1/M of the number of DMRS ports.
  • the P value may be the number of ports of the PTRS resource set configured by the base station, as described in Embodiment 1, or the number of ports P may be directly configured by the base station to the number of direct ports of the user by signaling, and the port set is not required to be configured.
  • the base station maps the relationship between the PTRS and the DMRS according to the MCS level of the terminal, and allocates the port with the higher MCS level in the DMRS as the first subset, and so on.
  • the high-level signaling of the base station may not configure the detailed information of the PTRS port set, and only needs to inform the terminal of the final number of P-ports P, and the P ports occupy consecutive P sub-carriers in the frequency domain.
  • FIG. 10a is a PTRS pattern a of a non-port set indication according to an embodiment of the present invention.
  • the number of the PTRS port may not correspond to the corresponding DMRS port number.
  • FIG. 10b is a PTRS pattern b of the non-port set indication according to the embodiment of the present invention, and the port number design of the PTRS is shown in FIG. 10b.
  • the number of the PTRS also represents the number of ports, and the pattern at this time can solve the existence of 4 ports.
  • the terminal of the DMRS port, and the four DMRS ports use the same codebook, so the DMRS ports 1, 2, 3, and 4 of the terminal 1 can complete phase compensation by using one PTRS port, and the PTRS port 1 corresponds to The 4 DMRS ports.
  • PTRS port 2 corresponds to DMRS port 5 and is used to compensate the phase of other terminals.
  • the base station can transmit the port number without transmitting the port set.
  • each phase tracking reference signal within the set of phase tracking reference signal resources or the time domain frequency domain density of each set of phase tracking reference signals is configurable;
  • the resource set of the phase tracking reference signal includes a pre- Defined resource configuration;
  • the eNB may configure the parameter to indicate the time-frequency domain density of the PTRS through RRC or DCI signaling, for example, the predefined time domain density is 1, and if the RRC signaling or the DCI signaling is not notified, the density of the PTRS fills the entire time domain. Symbol processing. If the PTRS density is not 1, the user can be notified by DCI to send 1 bit information, and the density of the PTRS corresponding to the port in the time domain is 1/2 or 1/4 of the density when the entire time domain symbol is occupied. The same frequency domain density can be mapped in a similar way.
  • the time-frequency domain density of the DCI notification may be adjusted according to the change of the MCS level, but may not exceed the time-frequency domain density threshold of the high-level signaling. For example, when the time-frequency domain density of a user's PTRS is reduced, DCI signaling notifies the user of the new pattern. Since the time-frequency domain resources occupied by the PTRS are reduced, the user can send data on the changed resources, and other users do not make adjustments. If a user's time-frequency domain density increases, DCI signaling does not notify the new pattern, and the user's PTRS still uses the old pattern.
  • the base station aggregates the ports through RRC signaling, and sends the data to the user according to the resource mapping bitmap, and performs demodulation of the reference signal and the data for the obtained DMRS and PTRS patterns.
  • the base station can inform the user of the new PTRS pattern through DCI signaling.
  • the DCI can inform the user of the density change in the PTRS time domain at this time by using the 1-bit information.
  • FIG. 11 is a phase tracking reference signal pattern of different densities according to an embodiment of the present invention.
  • the user 2 can transmit the PTRS of half the symbol number and the data of the half symbol number on the subcarrier corresponding to the DMRS port position, thereby improving the spectrum efficiency.
  • the other two users will not receive the relevant signaling, and still occupy the entire time domain symbol according to the RRC configured PTRS port 3, all of which are recorded as zero power PTRS, which can save a part of the overhead without spectrum efficiency. Has a big impact.
  • each phase tracking reference signal within the set of phase tracking reference signal resources or the time domain frequency domain density of each set of phase tracking reference signals is configurable
  • the base station configures a multi-user PTRS resource set, and the predefined time domain density is 1, that is, the entire time domain symbol is occupied. If the time domain density becomes 1/2 or 1/4, the DCI can notify the port by using 1-bit information. Density changes.
  • the base station configures DMRS port 1 to implement one PTRS port 1 assigned by the two terminals.
  • the PTRS density also decreases.
  • the two PTRS patterns can be implemented by time division, as shown in Figure 12. Show.
  • Figure 12 is a PTRS pattern of a pseudo orthogonal terminal in accordance with an embodiment of the present invention.
  • nscid can be used to indicate the allocation of two ports of PTRS.
  • the terminal with nscid of 0 uses PTRS port 1
  • the terminal with nscid of 1 uses PTRS port 2.
  • the set of phase tracking reference signal resources is notified to the second communication node by the first communication node by means of a bitmap.
  • the dimension of the bitmap is the number of ports for demodulating the reference signal
  • the two states of each bit in the bitmap indicate that the position is a phase tracking reference signal or data bit, respectively.
  • Bitmap is set to the dimension of the number of DMRS ports. At this time, the dimension of the bitmap has nothing to do with PTRS.
  • the content of the bitmap mapping indicates whether the port location corresponding to the DMRS is to transmit PTRS or data. For example, if a bit in the bitmap is 0, it means that the data is transmitted here, and when it is 1, it means that the PTRS is transmitted at this position.
  • Figure 13 is a PTRS pattern of the terminal 1 in accordance with an embodiment of the present invention.
  • the number of DMRS ports is 8, so the content of the bitmap mapping is 8 bits of [1, 0, 1, 0, 1, 0, 1, 0].
  • the DMRS port corresponding to terminal 1 is port 1 and port 2
  • the DMRS port corresponding to terminal 2 is port 3 and port 4
  • the DMRS port corresponding to terminal 3 is port 5 and port 6
  • the DMRS port corresponding to terminal 4 is port 7 and Port 8, in this case, each terminal obtains a corresponding PTRS port resource set as [1, 3, 5, 7], and the position of the zero-power PTRS can be obtained according to the correspondence relationship of the DMRS ports.
  • phase tracking reference signal ports of different subsets correspond to demodulation reference signal partial ports or all ports of the same subset.
  • the base station performs grouping according to the PTRS requirement of the terminal, that is, the port in the first subset of the DMRS corresponds to a terminal with a higher MCS level and a larger PTRS requirement, and the second subset is followed by the other subsets.
  • the subset of PTRS ports corresponds to a subset of different DMRS ports, as shown in FIG. 14a, and FIG. 14a is a PTRS pattern a of the embodiment of the present invention.
  • the first subset of the PTRS port corresponds to the first subset of the DMRS port
  • the second subset of the PTRS port corresponds to the first subset of the DMRS port and the second subset of the DMRS port
  • the PTRS port 1 and port 7 correspond to the DMRS.
  • Port 1, PTRS port 2 and PTRS port 8 correspond to DMRS port 2.
  • both terminal 1 and terminal 2 use DMRS port 1 and DMRS port 2
  • both terminal 1 and terminal 2 can use high-density PTRS, so terminal 1 and Terminal 2 requires two DMRS ports to perform phase compensation, and some ports in the second subset of DMRS do not need PTRS compensation.
  • two terminals correspond to DMRS port 1 and DMRS port 2
  • PTRS corresponds to PTRS port 1, port 2, PTRS port 7, and port 8, where port 7 and port 8 also correspond to DMRS port 1 and port 2, but here Port 7 and port 8 correspond to DMRS port 1 and port 2 on different subcarriers.
  • FIG. 14b is a PTRS pattern b according to an embodiment of the present invention, and the first subset of PTRS [1, 2, 3, 4] and the second subset [5, 6, 7, 8] correspond to the DMRS.
  • a subset, and the ports in the second subset of PTRS correspond to ports in the first subset of DMRSs in other frequency domain transmission periods, and more pseudo-orthogonal terminals can be solved.
  • the design of the PTRS can be as shown in FIG. 15, and FIG. 15 is a multi-column DMRS corresponding to the embodiment of the present invention. PTRS pattern.
  • the base station allocates different sets of phase tracking reference signal resources for different demodulation reference signal patterns.
  • the configuration of the P value may be a semi-static value of the high layer signaling configuration, for example, configured as 4.
  • the base station is configured with four PTRS ports, which means that when there are four DMRS ports, four PTRS ports are available; when less than four DMRS ports, two of the four PTRS ports can be used;
  • the P value may be a set of higher layer signaling configurations, that is, the base station configures different P values according to the pattern type of the DMRS. For example, if [2, 4, 4] is configured, it means that two PTRS ports are configured for two orthogonal DMRS ports; for four DMRS ports, four PTRS ports are configured for base stations; for eight orthogonal DMRS ports, for base station configuration 4 PTRS ports;
  • Fig. 16 is a diagram corresponding to the orthogonal port DMRS of the embodiment 12 of the present invention.
  • FIG. 17a is a PTRS pattern of occupying 7 time domain symbols per subframe according to an embodiment of the present invention.
  • FIG. 17b is a DMRS in each PRB that does not occupy 12 in the embodiment of the present invention.
  • PTRS pattern of subcarriers is shown in FIG. 17b.
  • the first communication node utilizes a first subset of the demodulation reference signal resources to indicate a first subset of the phase tracking reference signal resources, utilizing a second subset of the demodulation reference signal resources Instructing a second subset of the phase tracking reference signal resources; the ports of the first subset of demodulation reference signal resources and the ports of the second subset are code division multiplexed or time division multiplexed in the time domain, and The ports of the first subset of the second type of noise reference signal resources and the ports of the second subset are frequency division multiplexed. And, in each of the subset frequency domain of the phase tracking reference signal port resource, the first subset and the second subset of the demodulation reference signal resources are transmitted.
  • FIG. 18 is a pattern of reference ports each having eight ports in the embodiment of the present invention.
  • the demodulation reference signal has eight ports, ports 1, 5 occupy the same subcarrier, and ports 2 and 6 occupy the same subcarrier.
  • Carriers, 3, 7 occupy the same subcarrier, and 4, 8 occupy the same subcarrier.
  • Ports of the first subset of demodulation reference signal resources and ports of the second subset are code division multiplexed or time division multiplexed in the time domain, requiring corresponding ports and second ports in the first subset of demodulation reference signals
  • the corresponding port in the subset is time division multiplexing or code division multiplexing, and the corresponding ports in different subsets may be on the same subcarrier. As shown in FIG.
  • the first subset of the first reference signal includes the port ⁇ 1, 2, 3, 4 ⁇ , and the second subset may include the port ⁇ 5, 6, 7, 8 ⁇ , then the first subset Port 1 and port 5 in the second subset are time division multiplexed or code division multiplexed; port 2 in the first subset and port 6 in the second subset are time division multiplexed or code division multiplexed; Port 3 in a subset and port 7 in a second subset are time division multiplexed or code division multiplexed; port 4 in the first subset and port 8 in the second subset are time division multiplexed or code division multiplexed use.
  • the first subset of the first reference signal includes ports ⁇ 1, 6, 3, 8 ⁇
  • the second subset can include ports ⁇ 5, 2, 7, 4 ⁇ , then port 1 in the first subset Port 5 in the second subset is time division multiplexed or code division multiplexed; port 2 in the first subset and port 6 in the second subset are time division multiplexed or code division multiplexed; the first subset Port 3 and port 7 in the second subset are time division multiplexed or code division multiplexed; port 4 in the first subset and port 8 in the second subset are time division multiplexed or code division multiplexed.
  • the phase tracking reference signal is also divided into two subsets, and the two subsets are frequency division multiplexed.
  • the eight ports included in the phase tracking reference signal are also divided into two subsets, the first subset includes ports ⁇ 1, 2, 3, 4 ⁇ of the phase tracking reference signal, and the second subset includes phases.
  • the port of the reference signal is tracked ⁇ 5, 6, 7, 8 ⁇ , at which time ports 1, 2, 3, 4 and ports 5, 6, 7, 8 are frequency division multiplexed.
  • a first subset of demodulation reference signal resources indicates a first subset of the phase tracking reference signal resources
  • a second subset of the demodulation reference signal resources is utilized to indicate the phase tracking reference signal The second subset of resources.
  • the first subset of port resources of the demodulation reference signal corresponds to the first port resource subset of the phase tracking reference signal
  • the second subset of port resources of the demodulation reference signal corresponds to the second port resource subset of the phase tracking reference signal.
  • the first subset of demodulation reference signals includes demodulation reference signal ports ⁇ 1, 2, 3, 4 ⁇
  • the first subset of phase tracking reference signals includes ports ⁇ 1, 2, 3, 4 of phase tracking reference signals ⁇
  • the second subset of demodulation reference signals includes demodulation reference signal ports ⁇ 5, 6, 7, 8 ⁇
  • the second subset of phase tracking reference signals includes ports for phase tracking reference signals ⁇ 5, 6, 7, 8 ⁇
  • the base station can use the port information of the notification demodulation reference signal to indicate the port information of the phase tracking reference signal. For example, if the base station notifies the user that the port of the demodulation reference signal used is 5, 6, the user can know that the port of the phase tracking reference signal is also one or more of ⁇ 5, 6 ⁇ .
  • the first subset and the second subset of the demodulation reference signal resources are transmitted within a frequency range of each subset of the phase tracking reference signal port resources.
  • the first subset of the phase tracking reference signals that is, the subcarriers corresponding to the ports 1, 2, 3, and 4 of the phase tracking reference signal
  • demodulation of the reference signal Both ports contain ports that transmit, that is, all ports that demodulate the reference signal are transmitted; likewise, in the frequency domain of the second subset of phase tracking reference signals, that is, port 5 of the phase tracking reference signal.
  • the ports included in the two subsets of the demodulation reference signal are transmitted, that is, all ports of the demodulation reference signal are transmitted.
  • the port included in the first subset of the demodulation reference signal can be regarded as a port mapped on the first OFDM symbol in the demodulation reference signal region, and the second subset of the demodulation reference signal is included.
  • the port can be thought of as a port mapped on the second OFDM symbol within the demodulation reference signal region.
  • phase tracking reference signal port numbers are different for different second communication nodes.
  • the port of U0 can be as shown in FIG. 18, and the port of U1 can be as shown in FIG. 18a.
  • FIG. 18a is a sequence diagram of the phase tracking reference signal port according to the embodiment of the present invention.
  • the first subset of the phase tracking reference signal The included port ⁇ 1, 5, 3, 7 ⁇ corresponds to the first subset of the demodulation reference signal ⁇ 1, 2, 3, 4 ⁇ , that is, the port 1 of the phase tracking reference signal, corresponding to the port of the demodulation reference signal 1; port 5 of the phase tracking reference signal, port 2 corresponding to the demodulation reference signal; port 3 of the phase tracking reference signal, port 3 corresponding to the demodulation reference signal, port 7 of the phase tracking reference signal, corresponding to the demodulation reference signal Port 4;
  • the second subset of phase tracking reference signals contains ports ⁇ 2, 6, 4, 8 ⁇ corresponding to the first subset of demodulation reference signals ⁇ 5, 6, 7, 8 ⁇ , ie the port of the phase tracking reference signal 2, port 5 corresponding to the demodulation reference signal; port 6 of the phase tracking reference signal, port 6 corresponding to the demodulation reference signal; port 4 of the phase tracking reference signal, port 7 corresponding to the demodulation reference signal; phase tracking reference signal Port 8, corresponding to port 8 of the demodulation reference signal.
  • the port correspondence relationship described in this embodiment refers to the same precoding.
  • the first communication node is configured by the high-level signaling to the second communication node to phase-track the reference signal port resource set;
  • the reference signal port resource includes at least one of the following parameters: port number, port serial number, and time domain density. , frequency domain density, pattern, and multiplexing between ports.
  • the high-level signaling here refers to RRC signaling or MAC signaling
  • the base station configures a port set of the user phase tracking reference signal through high-level signaling, and the port set includes a port number that is often smaller than that of the phase tracking reference signal.
  • the number of ports As shown in FIG. 19, FIG. 19 is a sequence diagram of four phase tracking reference signal ports according to an embodiment of the present invention.
  • the base station can configure four phase tracking reference signal ports to the user through high layer signaling. At this point, the maximum number of ports for the phase tracking reference signal is still eight, as shown in Figure 18a.
  • the base station can use the higher layer signaling to notify the user of the maximum number of ports of the phase tracking reference signal, for example, 4, then the user can know that the port 1, 2, 3, 4 of the phase tracking reference signal is configured to the user, that is,
  • the resource set of the phase tracking reference signal includes ports 1, 2, 3, and 4.
  • the base station can use a bit map to notify the port set of the phase tracking reference signal, for example, there are 8 phase tracking reference signal ports, and the 8bits map can be used to indicate whether the corresponding port is included, for example, 10000001 represents the first port. And the 8th port is included in the resource collection.
  • the first communication node indicates usage of the phase tracking reference signal port resource set by demodulating the reference signal resource allocation condition.
  • the resource set configured by the base station to the user phase tracking reference signal by using the high layer signaling includes the phase tracking reference signal ports 1, 2, 3, 4.
  • port 1 of DMRS demodulation reference signal
  • PTRS phase tracking reference signal
  • port 3 of DMRS corresponds to PTRS
  • port 5 of DMRS corresponds to PTRS
  • port 2 Port 7 of the DMRS corresponds to PTRS, port 4.
  • the port of the corresponding phase tracking reference signal is sent, and the rest of the port resource set A zero-power reference signal is sent on the port.
  • the base station configures the port for demodulating the reference signal to the user through the signaling, including the DMRS port 5, 6, and the two DMRS ports correspond to one PTRS, since the DMRS port 5 corresponds to the PTRS port 2, the user You can know that PTRS is sent on port 2 of PTRS.
  • PTRS port 2 belongs to the port resource set ⁇ 1, 2, 3, 4 ⁇ , then port 2 is to be transmitted, and the remaining ports 1, 3, 4 will not transmit reference signals or transmit zero-power reference signals.
  • This zero-power reference signal can be understood as a zero-power phase tracking reference signal or other reference signal.
  • the first communication node transmits or receives data on a phase tracking reference signal resource outside of the set of phase tracking reference signal port resources. In an embodiment, the first communication node does not transmit any signal or transmit a reference signal of zero power on the phase tracking reference signal resource outside the set of phase tracking reference signal port resources. Based on the number of ports of the phase tracking reference signal in this example, and the port resource set includes PTRS ports 1, 2, 3, 4, the default tracking port 5, 6, 7, 8 can be used. transfer data. Of course, by default, it is also possible to transmit nothing or a zero-power reference signal.
  • this embodiment can save the overhead of dynamic signaling. For example, if multiple users are performing multi-user scheduling, the base station semi-statically allocates a set of resources to the users with high-level signaling. For a certain user, the port of the phase tracking reference signal can be determined according to the configured port of the demodulation reference signal. (The MCS corresponding to the port can be greater than one threshold), and other ports in the resource set send zero-power reference signals.
  • the default configuration on the port included in the semi-statically configured resource set is to transmit a zero-power reference signal unless certain ports in the set are identical to the phase tracking reference signal port corresponding to the user-configured demodulation reference signal. In this way, when multiple users are scheduling, different reference signal ports corresponding to different users may be used to track the reference signal ports according to different phases, so that the multi-ports of the phase tracking reference signals belonging to different users may be orthogonal.
  • the number of data layers or demodulation reference signal ports generally configured for one user may be greater than one threshold.
  • the zero-power reference signal is not needed at this time, that is, the resource set of the phase tracking reference signal has no meaning, that is, the user does not need to consider the port included in the resource set, even if the base station configures the resource set at this time. That is, when the number of ports of the demodulation reference signal is greater than a threshold, the second type of noise reference signal port resource set is not enabled.
  • the base station high-level configuration gives a user PTRS, the user can use the MCS level to notify the PTRS of the presence or absence of the dynamic.
  • the PTRS if the MCS is higher than a threshold, the PTRS exists; if the MCS is lower than a threshold, the PTRS does not exist.
  • the PTRS if a high-level configuration of a user PTRS does not exist, then even if the MCS is higher, the PTRS does not exist.
  • the base station may use the MCS level, the actual scheduled bandwidth, and the like to implicitly indicate the time-frequency domain density of the user PTRS in the case of single-user scheduling, and may not consider phase tracking.
  • the PTRS port actually sent at this time is the PTRS port corresponding to the DMRS port.
  • the number of ports of the demodulation reference signal is less than a threshold, that is, it is considered as multi-user scheduling, and the second type of noise reference signal port resource set is enabled.
  • phase tracking reference signal resources are hopped on different time units or frequency domain units.
  • the relative position of the phase tracking reference signal pattern is related to the sequence number of the time unit or the frequency domain unit.
  • the PTRS may hopping on different slots or different sub-bands.
  • FIG. 20 is a schematic diagram of ports of a phase tracking reference signal corresponding to different demodulation reference signal ports in different time units according to an embodiment of the present invention
  • N demodulation reference signal ports are associated with one phase tracking reference signal port, there are N types of precoding methods of the phase tracking reference signal, wherein N ⁇ 1 error! The reference source was not found. ;
  • the first communication node separately configures a correspondence relationship between the demodulation reference signal and the phase tracking reference signal for different time units or different frequency domain units;
  • the port corresponding to the demodulation reference signal port of the phase tracking reference signal means that the phase tracking reference signal port and the demodulation reference signal port use the same precoding.
  • the correspondence between the phase tracking reference signal port and the demodulation reference signal port is related to the sequence number of the time unit or the frequency domain unit.
  • FIG. 21 is a diagram of hopping on different slots or sub-bands according to an embodiment of the present invention.
  • the user's PTRS may have two situations:
  • the base station allocates one PTRS port for the X DMRS ports.
  • the PTRS port 1 allocated by the base station corresponds to the DMRS port 1
  • the PTRS port 1 allocated by the base station corresponds to the DMRS port 2;
  • the X DMRS ports correspond to X PTRS ports, but the base station selects one of the X PTRS ports for the user. In the first slot or subband, the base station selects PTRS port 1, and in the second slot or subband, the base station selects PTRS port 2;
  • the rules for phase tracking reference signal resource hopping are different for different first communication nodes or second communication nodes.
  • Different base stations can configure different hopping rules for users. Assume that the base station 1 is configured with hopping rules for users. As described above, different base stations can configure different hopping rules for different users:
  • the PTRS is sent in the first PRB in the first slot or subband configured for the user of the base station 1, and the PTRS is sent in the second PRB in the second slot or the subband.
  • the base station 2 can be configured for the user. Sending a PTRS on the first PRB in the first slot or subband, and transmitting a PTRS on the third PRB in the second slot or subband;
  • the base station 1 configures the user to configure the PTRS port in the first slot or subband corresponding to the DMRS port 1, and configures in the second slot or subband.
  • the PTRS port corresponds to the DMRS port 2; and the base station 2 can be configured for the user in the first slot or the in-band PTRS port corresponding to the DMRS port 1, and the PTRS port corresponding to the DMRS port 3 in the second slot or subband.
  • the frequency of the PTRS of the user is different, the number of ports of the DMRS associated with one PTRS port is different, and the time domain resources of the base station are different.
  • the PTRS hopping has different rules, and the number of DMRS ports mentioned above, The number of PTRS ports and the number of PRBs are examples, and there is no limit on the number;
  • Embodiments of the present invention also provide a storage medium.
  • the above storage medium may be configured to store program code for performing the following steps:
  • S2. Indicate, by using an allocation of demodulation reference signal resources, usage of each resource in the phase tracking reference signal resource set.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • mobile hard disk a magnetic disk
  • optical disk a variety of media that can store program code.
  • the processor performs configuration to the second communication node phase tracking reference signal resource set according to the stored program code in the storage medium
  • the processor performs an indication of the allocation of the demodulated reference signal resource according to the stored program code in the storage medium to indicate the usage of each resource in the set of phase tracking reference signal resources.
  • modules or steps of the above-described embodiments of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed among multiple computing devices. Composed on the network. In an embodiment, they may be implemented in program code executable by a computing device such that they may be stored in a storage device for execution by the computing device and, in some cases, may be different than the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • embodiments of the invention are not limited to any specific combination of hardware and software.
  • the method and device for processing a reference signal provided by the present disclosure can design a corresponding phase tracking reference signal for specific information of a demodulation reference signal.

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Abstract

La présente invention concerne un procédé et un appareil de traitement de signal de référence. Le procédé comprend les étapes suivantes : un premier nœud de communication attribue un ensemble de ressources de signal de référence de suivi de phase à un second nœud de communication; et le premier nœud de communication indique la condition d'utilisation de chaque ressource dans l'ensemble de ressources de signal de référence de suivi de phase par démodulation de la condition d'attribution d'une ressource de signal de référence, la ressource de signal de référence de suivi de phase comprenant au moins l'un des paramètres suivants : le nombre de ports, les nombres de séquence de port, une densité de domaine temporel, une densité de domaine de fréquence, un motif et une manière de multiplexage parmi les ports.
PCT/CN2018/080499 2017-03-24 2018-03-26 Procédé et appareil de traitement de signal de référence WO2018171800A1 (fr)

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