CN115550120A

CN115550120A - Communication method and device

Info

Publication number: CN115550120A
Application number: CN202110747402.8A
Authority: CN
Inventors: 徐明慧; 赵延青; 刘凤威
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30
Also published as: WO2023273872A1

Abstract

The embodiment of the application provides a communication method and a device, wherein the method comprises the following steps: the method comprises the steps that terminal equipment receives configuration information of a phase tracking reference signal PTRS from network equipment, wherein the configuration information comprises a PTRS port number and/or the number of the PTRS ports; the terminal equipment determines a PTRS orthogonal code sequence according to the configuration information; the terminal equipment generates a PTRS sequence according to the PTRS orthogonal code sequence; the terminal equipment maps the PTRS sequence to time frequency resources; the terminal equipment sends the PTRS to the network equipment, and by adopting the embodiment of the application, interference introduced between sending ends due to different source noises can be eliminated, and the data demodulation performance is improved.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

Currently, high frequencies, e.g., above 6 gigahertz (GHz), frequency bands, including mainly 28GHz, 39GHz, 60GHz, 73GHz, etc., are being used to address the increasing communication demand because of their abundant frequency band resources. The antenna array has the remarkable characteristics of large bandwidth and high integration to realize high throughput, but serious middle radio frequency distortion problems such as phase noise (PHN) and Central Frequency Offset (CFO) exist, in addition, the doppler frequency shift of high frequency is larger, and phase errors are introduced by the three, so that the performance of a high frequency communication system is reduced or even the high frequency communication system cannot work.

Taking phase noise as an example, as the frequency band increases, the higher the power spectral density of the phase noise, the greater the influence on the received signal, as shown in fig. 1 and fig. 2, respectively, when the frequency band is higher, the demodulation performance will be degraded due to the deterioration of the phase noise, so in the existing New Radio (NR) protocol, in uplink transmission, for two waveforms, a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and a discrete fourier transform extended orthogonal frequency division multiplexing (DFT-s-OFDM) both introduce a Phase Tracking Reference Signal (PTRS) for compensating the influence of the phase noise and improving the demodulation performance under the condition of the phase noise. That is to say, in order to remove phase noise, a transmitting end needs to transmit a reference signal known to a receiving end, that is, a PTRS, and the receiving end can estimate the phase noise and then perform corresponding phase compensation according to the reference signal.

Disclosure of Invention

The embodiment of the application discloses a communication method and a communication device, which can eliminate interference introduced between sending ends due to different source noises and improve data demodulation performance.

A first aspect of an embodiment of the present application discloses a communication method, including:

the method comprises the steps that terminal equipment receives configuration information of a phase tracking reference signal PTRS from network equipment, wherein the configuration information comprises a PTRS port number and/or the number of the PTRS ports;

the terminal equipment determines a PTRS orthogonal code sequence according to the configuration information;

the terminal equipment generates a PTRS sequence according to the PTRS orthogonal code sequence;

the terminal equipment maps the PTRS sequence to time frequency resources;

and the terminal equipment sends the PTRS to the network equipment.

In the method, when the network equipment has a plurality of physical receiving channels, that is, the network equipment has a plurality of paths of different source noises, the terminal equipment receives PTRS configuration information of the network equipment, determines a PTRS orthogonal code sequence according to the configuration information so as to generate a PTRS sequence, maps the PTRS sequence to a time-frequency resource, and then sends the PTRS to the network equipment, so that multiplexing of PTRS ports among the terminal equipment can be realized, inter-terminal interference and/or inter-terminal flow interference introduced by the different source noises of the network equipment can be eliminated, the demodulation performance of data is improved, and the PTRS cost of the terminal equipment is ensured to be lower and the spectral efficiency is improved in a PTRS port code division multiplexing mode.

In one possible implementation, the multiplexing mode of the PTRS port is frequency domain code division multiplexing.

In the method, the same frequency domain resource is occupied through the PTRS port, and the overhead can be reduced.

In another possible implementation manner, the mapping, by the terminal device, the PTRS sequence onto a time-frequency resource includes: the terminal equipment maps the PTRS sequence to the time frequency resource according to the PTRS pattern; the PTRS pattern includes a position for mapping the PTRS sequence.

In yet another possible implementation manner, the method further includes: the terminal equipment determines the PTRS pattern according to the PTRS port number and/or the number of the PTRS ports.

In another possible implementation manner, the determining, by the terminal device, the PTRS pattern according to the PTRS port number and/or the number of PTRS ports includes: the terminal equipment determines a first index set according to K and a system bandwidth, wherein the first index set comprises a set of indexes used for mapping Resource Blocks (RBs) of the PTRS sequences in the system bandwidth; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the terminal device receives a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs (resource blocks) of a physical uplink shared channel or a physical downlink shared channel that are allocated to the terminal device by the network device within the system bandwidth; the terminal device determines a third index set by taking the intersection of the first index set and the second index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the one PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation form of the method, the method further comprises the following steps: the terminal equipment receives first indication information from the network equipment, wherein the first indication information is used for indicating an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the terminal device determines a first index set according to K and a system bandwidth, and the method comprises the following steps: and the terminal equipment determines the first index set according to the index of the RB of the first PTRS block, the K and the system bandwidth.

In yet another possible implementation manner, the method further includes: and the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating the value of the K.

In yet another possible implementation, the K is specified by a protocol.

In another possible implementation manner, the determining, by the terminal device, the PTRS pattern according to the PTRS port number and/or the number of PTRS ports includes: the terminal equipment determines a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents a density of the PTRS pattern in a frequency domain, with a PTRS mapped on one RB per K RBs; the terminal device receives a second message from the network device, where the second message is used to indicate a fifth index set, and the fifth index set includes a set of indexes of RBs (resource blocks) of a physical uplink shared channel or a physical downlink shared channel that are allocated to the terminal device by the network device within the partial bandwidth; the terminal device determines a sixth index set by intersecting the fourth index set with the fifth index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, K is determined by the partial bandwidth and a first association relationship, where the first association relationship is an association relationship between the number of RBs included in the partial bandwidth and K, and the partial bandwidth includes a shared bandwidth among a plurality of terminal devices.

In yet another possible implementation manner, there are N consecutive RBs on each RB corresponding to an index in the third index set or an index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS sequence; the PTRS is mapped in each RB; wherein N is _ptrs Represents the number of the PTRS ports.

In yet another possible implementation manner, the method further includes: the terminal device receives third indication information from the network device, wherein the third indication information is used for indicating the PTRS orthogonal code sequence or the orthogonal code sequence set.

In another possible implementation manner, the method further includes: and the terminal equipment determines the number of the PTRS ports according to the third indication information.

In yet another possible implementation, the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes a plurality of consecutive subcarriers, and the number of consecutive subcarriers is smaller than the number of PTRS ports.

In yet another possible implementation, the number of PTRS ports is greater than 1.

A second aspect of the embodiments of the present application discloses a communication method, including: the network equipment determines configuration information of a phase tracking reference signal PTRS; the network equipment sends configuration information of the PTRS to terminal equipment, wherein the configuration information comprises PTRS port numbers and/or the number of the PTRS ports; the network equipment determines a PTRS orthogonal code sequence used by the terminal equipment for generating a PTRS sequence according to the PTRS port number and/or the number of the PTRS ports; the network device receives the PTRS from the terminal device according to the PTRS orthogonal code sequence and the PTRS pattern.

In the method, when the network equipment has a plurality of physical receiving channels, that is, the network equipment has a plurality of paths of different source noises, the network equipment sends PTRS configuration information to the terminal equipment, the network equipment determines a PTRS orthogonal code sequence used by the terminal equipment for generating the PTRS according to the configuration information, and the network equipment receives the PTRS according to the PTRS orthogonal code and the PTRS pattern, so that multiplexing of PTRS ports among the terminal equipment can be realized, inter-terminal interference and/or inter-terminal interference caused by the different source noises of the network equipment can be eliminated, the demodulation performance of data is improved, and the lower PTRS overhead of the terminal equipment is ensured and the spectral efficiency is improved by the PTRS port code division multiplexing mode.

In one possible implementation, the multiplexing mode of the PTRS port is frequency domain code division multiplexing. In the method, the same frequency domain resource is occupied through the PTRS port, and the overhead can be reduced.

In yet another possible implementation manner, the method further includes: the network device determines the PTRS pattern according to the PTRS port number and/or the number of the PTRS ports.

In yet another possible implementation manner, the determining, by the network device, the PTRS pattern according to the PTRS port number and/or the number of PTRS ports includes: the network equipment determines a first index set according to K and a system bandwidth, wherein the first index set comprises a set of indexes used for mapping Resource Blocks (RBs) of the PTRS sequences in the system bandwidth; the K represents a density of the PTRS pattern in a frequency domain; one RB in every K RBs is mapped with PTRS; the network device sends a first message to the terminal device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs allocated by the network device to the terminal device in a physical uplink shared channel or a physical downlink shared channel within the system bandwidth; the network equipment determines a third index set by taking the intersection of the first index set and the second index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the one PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, the method further includes: the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the indexes of RBs of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the network device determines a first index set according to K and a system bandwidth, including: the network device determines the first index set according to the index of the RB of the first PTRS block, the K and the system bandwidth.

In yet another possible implementation manner, the method further includes: and the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating the value of the K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the determining, by the network device, the PTRS pattern according to the PTRS port number and/or the number of PTRS ports includes: the network equipment determines a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the network device sends a second message to the terminal device, where the second message is used to indicate a fifth index set, and the fifth index set includes a set of indexes of RBs allocated by the network device to the terminal device in the physical uplink shared channel or the physical downlink shared channel in the partial bandwidth; and the network equipment determines a sixth index set by intersecting the fourth index set with the fifth index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as that of the PTRS ports.

In yet another possible implementation manner, there are N consecutive RBs on each RB corresponding to an index in the third index set or an index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS; the PTRS is mapped in each RB; wherein, N _ptrs Represents the number of the PTRS ports.

In yet another possible implementation manner, the method further includes: third indication information of the network device to the terminal device, wherein the third indication information is used for indicating the PTRS orthogonal code sequence or the orthogonal code sequence set.

In another possible implementation manner, the method further includes: the network equipment determines the number of the PTRS ports according to the third indication information.

In yet another possible implementation manner, the method further includes: the network equipment determines the phase difference between a phase noise public phase error CPE on data symbols of a physical shared uplink channel received by each physical receiving channel and a demodulation reference signal DMRS symbol of the physical shared uplink channel; and the network equipment compensates the data signals according to the difference between the phase differences corresponding to different physical receiving channels.

A third aspect of the embodiments of the present application discloses a communication apparatus, including: a communication unit and a processing unit, wherein the communication unit is used for receiving configuration information of a phase tracking reference signal PTRS from a network device, and the configuration information comprises a PTRS port number and/or the number of the PTRS ports; the processing unit is used for determining a PTRS orthogonal code sequence according to the configuration information; the processing unit is further configured to generate a PTRS sequence from the PTRS orthogonal code sequence; the processing unit is further configured to map the PTRS sequence to a time-frequency resource; the communication unit is further configured to send a PTRS to the network device.

In one possible implementation, the multiplexing of the PTRS ports is frequency domain code division multiplexing.

In yet another possible implementation manner, the processing unit is configured to map the PTRS sequence onto the time-frequency resource according to a PTRS pattern; the PTRS pattern includes a position for mapping the PTRS sequence.

In yet another possible implementation manner, the processing unit is further configured to determine the PTRS pattern according to the PTRS port number and/or the number of PTRS ports.

In yet another possible implementation manner, the processing unit is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes of resource blocks RB used for mapping the PTRS sequence within the system bandwidth; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the communication unit is configured to receive a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the system bandwidth; the processing unit is configured to determine a third index set by intersecting the first index set and the second index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the PTRS block is the same as the number of PTRS ports.

In yet another possible implementation manner, the communication unit is further configured to receive first indication information from the network device, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processing unit is configured to determine the first index set according to an index of an RB of the first PTRS block, K, and a system bandwidth.

In yet another possible implementation manner, the communication unit is further configured to receive second indication information from the network device, where the second indication information is used to indicate a value of the K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processing unit is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents a density of the PTRS pattern in a frequency domain, with a PTRS mapped on one RB per K RBs; the communication unit is configured to receive a second message from the network device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the partial bandwidth; the processing unit is configured to determine a sixth index set by intersecting the fourth index set with the fifth index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the PTRS block is the same as the number of PTRS ports.

In yet another possible implementation manner, the communication unit is configured to receive third indication information from the network device, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In yet another possible implementation manner, the processing unit is further configured to determine the number of PTRS ports according to the third indication information.

With regard to the technical effects brought about by the third aspect or the possible implementations, reference may be made to the introduction of the technical effects of the first aspect or the respective implementations.

A fourth aspect of the embodiments of the present application discloses a communication apparatus, including: a communication unit and a processing unit for determining configuration information of a phase tracking reference signal PTRS; the communication unit is used for sending configuration information of the PTRS to the terminal equipment, wherein the configuration information comprises a PTRS port number and/or the number of the PTRS ports; the processing unit is used for determining a PTRS orthogonal code sequence used by the terminal equipment for generating PTRS according to the PTRS port number and/or the number of the PTRS ports; the communication unit is used for receiving the PTRS from the terminal equipment according to the PTRS orthogonal code sequence and the PTRS pattern.

In yet another possible implementation manner, the processing unit is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes of resource blocks RB used for mapping the PTRS sequence within the system bandwidth; the K represents a density of the PTRS pattern in a frequency domain; one RB in every K RBs is mapped with PTRS; the communication unit is configured to send a first message to the terminal device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs that are allocated by the network device to the terminal device in a physical uplink shared channel or a physical downlink shared channel within the system bandwidth; the processing unit is configured to determine a third index set by intersecting the first index set and the second index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the one PTRS block is the same as the number of PTRS ports.

In yet another possible implementation manner, the communication unit is further configured to send, to the terminal device, first indication information, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processing unit is configured to determine the first index set according to an index of an RB of the first PTRS block, K, and a system bandwidth.

In another possible implementation manner, the communication unit is further configured to send second indication information to the terminal device, where the second indication information is used to indicate a value of the K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processing unit is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the communication unit is configured to send a second message to the terminal device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to the terminal device in the physical uplink shared channel or the physical downlink shared channel in the partial bandwidth; the processing unit is configured to determine a sixth index set by intersecting the fourth index set with the fifth index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the PTRS block is the same as the number of PTRS ports.

In a further possible implementation manner, K is determined by the fractional bandwidth and a first association relationship, where the first association relationship is an association relationship between the number of RBs included in the fractional bandwidth and K, and the fractional bandwidth includes a shared bandwidth among a plurality of terminal devices.

In another kindIn a possible implementation manner, N consecutive indexes in the third index set or N consecutive indexes in the sixth index set are located on each RB corresponding to the index in the third index set or the index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS; the PTRS is mapped in each RB; wherein N is _ptrs Represents the number of the PTRS ports.

In yet another possible implementation manner, the communication unit is further configured to send, to the terminal device, third indication information, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In yet another possible implementation manner, the processing unit is further configured to determine a phase difference between a phase-to-noise common phase error CPE on a data symbol of a physical shared uplink channel received by each physical reception channel and a demodulation reference signal DMRS symbol of the physical shared uplink channel; the processing unit is further configured to compensate the data signal according to a difference between the phase differences corresponding to different physical receiving channels.

With regard to the technical effect brought about by the fourth aspect or the possible implementation, reference may be made to the introduction to the technical effect of the second aspect or the corresponding implementation.

A fifth aspect of the embodiments of the present application discloses a communication apparatus, which may be a terminal device or a chip in a terminal device, where the apparatus includes at least one processor, and optionally, the apparatus further includes a memory, and the processor is configured to call a computer program or an instruction in the memory to implement the method described in the foregoing first aspect or possible implementation manners of the first aspect.

A sixth aspect of the present embodiment discloses a communication apparatus, which may be a network device or a chip in a network device, where the apparatus includes at least one processor, and optionally, a memory, where the processor is configured to call a computer program or instructions in the memory to implement the method described in the foregoing second aspect or possible implementation manners of the second aspect.

A seventh aspect of embodiments of the present application discloses a computer program, which, when executed by a communication apparatus, implements the method described in the first aspect, the possible implementations of the first aspect, the second aspect, or the possible implementations of the second aspect.

An eighth aspect of embodiments of the present application discloses a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are executed by a communication device, the method described in the first aspect, the possible implementation manner of the first aspect, the second aspect, or the possible implementation manner of the second aspect is implemented.

A ninth aspect of the embodiments of the present application discloses a chip system, where the chip system includes at least one processor, a memory and an interface circuit, where the memory, the interface circuit and the at least one processor are interconnected through a line, and a computer program or an instruction is stored in the memory; the computer program or instructions, when executed by the processor, implement the method described in the first aspect, the possible implementation of the first aspect, the second aspect or the possible implementation of the second aspect.

Drawings

The drawings used in the embodiments of the present application are described below.

Fig. 1 is a schematic diagram of power spectrum densities of phase noise at different frequency points according to an embodiment of the present disclosure;

FIG. 2 illustrates the effect of different phase noise on a frequency domain received signal according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 4 is a functional block diagram of a communication system according to an embodiment of the present application;

FIG. 5 is a diagram illustrating a PTRS pattern for CP-OFDM according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a scenario provided by an embodiment of the present application;

fig. 7 is a flowchart illustrating a communication method according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a PTRS pattern provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of yet another PTRS pattern provided by an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a communication system 300 according to an embodiment of the present application, where the communication system 300 includes a network device 301 and a terminal device 302. The network device 301 sends (PTRS) configuration information to the terminal device 302, and accordingly, the terminal device 302 receives the PTRS configuration information from the network device 301, determines a PTRS orthogonal code sequence according to the PTRS configuration information, and generates a PTRS sequence according to the PTRS orthogonal code sequence; and mapping the PTRS sequence to a time-frequency resource according to the PTRS pattern, and sending the PTRS to the network device 301, and correspondingly, the network device 301 receives the PTRS from the terminal device 302, and performs phase noise estimation and corresponding phase compensation. Of course, the embodiment of the present application is for illustration, wherein the number of the network devices 301 and the terminal devices 302 may be more or less. The embodiment of the application can be applied to the following scenes: including but not limited to multi-site transmission, that is, a same User Equipment (UE) simultaneously transmits signals with multiple transmission points, backhaul, wireless to the x (WTTx), enhanced mobile broadband (eMBB), device to device (D2D), and other scenarios with higher requirements for timing or transmission rate. Also, the waveform is not limited, and the method can be applied to a system based on cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform-spread orthogonal frequency division multiplexing (DFT-s-OFDM).

(1) Terminal equipment, also known as UE, mobile Station (MS), mobile Terminal (MT), etc., includes equipment that provides voice and/or data connectivity to a user, and in particular may include equipment that provides voice to a user, or may include equipment that provides data connectivity to a user, or may include equipment that provides voice and data connectivity to a user. For example, may include a handheld device having wireless communication capabilities, or a processing device connected to a wireless modem. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchange voice or data with the RAN, or interact with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle-to-all (V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a light terminal device (light UE), a reduced capability user equipment (reduced capability UE, redap UE), a subscriber unit (subscriber unit), a subscriber station (mobile station), a remote station (remote station), an Access Point (AP), a remote terminal (remote terminal), a terminal (terminal), a subscriber station (user agent), or the like. For example, mobile telephones (otherwise known as "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-embedded mobile devices, and the like may be included. For example, personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, radio Frequency Identification (RFID), sensors, global Positioning Systems (GPS), laser scanners, and so forth.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, and the like.

In this embodiment, the terminal device may further include a relay (relay). Or, it is understood that any device capable of data communication with a base station may be considered a terminal device.

While the various terminal devices described above, if located on a vehicle (e.g., placed in or installed in a vehicle), may be considered as vehicle-mounted terminal devices, the vehicle-mounted terminal devices may be implemented as an on-board unit (OBU) or a communication means for an OBU; alternatively, the various terminal devices as described above, if located at the roadside, for example, provided at a roadside infrastructure, may be implemented as road-side units (RSUs) or communication means for RSUs.

In the embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, for example, a chip system, and the apparatus may be installed in the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.

2) The network device may refer to AN Access Network (AN) device, a Radio Access Network (RAN) node (or device) for accessing a terminal to a wireless network, and may also be referred to as a base station. Currently, some examples of RAN nodes are: a continuously evolved Node B (gNB), a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) access point (access point, AP), etc. In addition, in a network structure, the access network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node. The RAN equipment comprising CU nodes and DU nodes divides a protocol layer gnb in the NR system, the functions of part of the protocol layer are controlled in the CU in a centralized mode, and the functions of the rest part or all of the protocol layer are distributed in the DU. The functionality of the CU may be further split, e.g. by separating the Control Plane (CP) and the User Plane (UP), i.e. the control plane (CU-CP) and the user plane (CU-UP) of the CU.

The network device may also refer to a Core Network (CN) device, and the core network device includes, for example, an access and mobility management function (AMF) entity, a Session Management Function (SMF) entity, a User Plane Function (UPF) entity, and the like, which are not listed here. The AMF entity can be responsible for access management and mobility management of a terminal; the SMF entity may be responsible for session management, such as session establishment of a user; the UPF entity may be a functional entity of the user plane and is mainly responsible for connecting to an external network. It should be noted that, in the present application, an entity may also be referred to as a network element or a functional entity, for example, an AMF entity may also be referred to as an AMF network element or an AMF functional entity, and for example, an SMF entity may also be referred to as an SMF network element or an SMF functional entity, etc.

In this embodiment, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus capable of supporting the network device to implement the function, for example, a system on chip, and the apparatus may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example of a network device, and the technical solution provided in the embodiment of the present application is described.

As used herein, functional blocks of a communication system may be as shown in fig. 4, including: source bit generation, encoding, quadrature Amplitude Modulation (QAM), PTRS generation, resource Element (RE) mapping, inverse Fast Fourier Transform (IFFT) plus Cyclic Prefix (CP), channel equalization (including channel estimation), RE demapping, PTRS acquisition, phase noise estimation/compensation, QAM demodulation, and decoding, wherein the modules related to the embodiments of the present application are PTRS generation, RE mapping, PTRS acquisition, and phase noise estimation/compensation.

Non-homologous phase noise: when a signal is modulated from a baseband to a middle radio frequency band, a carrier signal with stable frequency is needed to carry the baseband signal, and the frequency point of the carrier signal is the carrier frequency in general. The phase noise in the embodiment of the present application refers to phase fluctuation on the carrier signal introduced by thermal noise of a device generating the carrier signal or the like. The carrier signal is generally formed by a local oscillation source and/or a reference signal, and if the carrier signals on different channels or different panels of the receiving end or the transmitting end are all from the same local oscillation and/or the same reference signal, the carrier signal is called as same-source noise; otherwise, the method is called non-same-source noise, that is, the method includes two scenarios that local oscillators are different or local oscillators are the same but reference signals are different.

In uplink transmission, the NR system adopts one of two waveforms of CP-OFDM and DFT-s-OFDM, and the PTRS pattern for CP-OFDM comprises two parameters, namely time domain density L and frequency domain density K _int Wherein the time domain density L indicates that there is one OFDM symbol and PTRS symbol per L OFDM symbols, and the frequency domain density K indicates _int Represents per K _int *N _sc/RB Each RE has oneRE has PTRS, N _sc/RB The number of subcarriers included in the frequency domain for one Resource Block (RB) is generally 12, as shown in fig. 5, where (a) in fig. 5 denotes K _int Schematic diagram of PTRS pattern when =2,l = 1; FIG. 5 (b) shows K _int Schematic diagram of PTRS pattern when =4,l =2; in FIG. 5, (c) represents K _int Schematic diagram of PTRS pattern when =2,l =4.

Wherein the time domain density L is related to a Modulation and Coding Scheme (MCS) of a data Quadrature Amplitude Modulation (QAM) modulation symbol, and the frequency domain density is related to a scheduling bandwidth, as shown in table 1 and table 2, wherein ptrs _ MCS _i (i =1,2,3) and N _RBi (i =0,1) are all configured to the terminal device by the network device through Radio Resource Control (RRC) signaling, ptrs-MCS ₄ As a default value, is related to the MCS table, so the PTRS pattern is determined by the MCS and the scheduling bandwidth.

Table 1

Scheduled MCS	Time domain density L
		I _MCs ＜ptrs_MCS ₁	Absence of PTRS
ptrs_MCS ₁ ≤I _MCs ＜ptrs_MCS ₂	4
		ptrs_MCS ₂ ≤I _MCS ＜ptrs_MCS ₃	2
ptrs_MCS ₃ ≤I _MCS ＜ptrs_MCS ₄	1

Table 2

Scheduling bandwidth	Frequency domain density K _int
		N _RB ＜N _RB0	Absence of PTRS
N _RB0 ≤N _RB ＜N _RB1	2
		N _RB1 ≤N _RB	4

The PTRS described above is designed primarily to take into account Common Phase Error (CPE) introduced by phase noise, so that the pilots are evenly distributed over the scheduling bandwidth.

In the existing protocol, for a PTRS in which a given UE supports only a single port during downlink transmission, the PTRS ports of multiple UEs may be associated with different demodulation reference signal (DMRS) ports, but the PTRS configurations of UEs other than the UEs are unknown among the multiple UEs. During uplink transmission, if the waveform is CP-OFDM, a single UE can support dual ports at most, and as with downlink, the PTRS configuration of UEs other than the UE among multiple UEs is unknown. That is, for uplink and downlink transmission, PTRS between multiple UEs can be understood as non-orthogonal multiplexing, for example, UE1 maps the position of the PTRS, and UE2 can map data or the PTRS; UE2 maps the location of PTRS, and UE1 may also map data or PTRS.

At present, for a single-UE multi-PTRS port for uplink transmission, mainly aiming at hardware configuration of a UE with non-homogeneous source noise, a signal model at different sources may be as shown in the following formula, specifically as follows:

wherein s is _i Is a signal transmitted by the terminal device,

the CPE introduced for the phase noise of the first path of the terminal equipment,

CPE introduced for the phase noise of the second path of the terminal equipment, H is a channel between the terminal equipment and a receiving end, w is the noise received by the receiving end, e ^jα And y is the signal received by the receiving end.

According to the formula, the receiving end can estimate the channel based on the DMRS, and the noise CPE (e) of the receiving end can be eliminated after equalization ^jα Obtaining two independent signals containing different phase noise CPE signals under the influence of the channel H, and respectively carrying out phase noise estimation and compensation on the two independent signals based on PTRS to recover the original signal s _i 。

However, in the uplink transmission process, when the receiving end also has multiple phase noises of different sources and cannot ignore the phase noises, the equalization process may introduce interference between terminals and degrade demodulation performance due to two frequency-divided PTRS ports in the conventional terminal and a non-orthogonal PTRS port between terminals.

In the following scenario shown in fig. 6, in which the wavy line represents a local oscillation source, a pRRU (micro remote radio unit) may be understood as a radio frequency receiving channel, and different prrus have different local oscillation sources, and different local oscillations cause different phase noises, that is, a receiving end has N channels with different sources, and any one of multiple terminals has a same source of terminal noise, or a terminal has only one phase noise source. At this time, the signal model received by the receiving end may be as shown in the following formula, specifically as follows:

wherein, y _i I =1, …, N is the number of prrus; s _j J =1, …, M being the number of UEs, for the signal transmitted by the jth UE;

for CPEs introduced for phase noise on the ith pRRU,

CPE, h introduced for phase noise on jth UE _ij For channels on the jth UE to ith pRRU, w _i A noise signal on the signal is received for the ith pRRU.

For simplicity of analysis, M = N =2 is described as an example, and the above formula is specifically as follows:

the receiving end can respectively estimate equivalent channels on OFDM symbols (hereinafter referred to as DMRS symbols) where the DMRS are located according to the DMRS, that is, the receiving end can estimate the equivalent channels on the OFDM symbols (hereinafter referred to as the DMRS symbols) where the DMRS are located respectively

Suppose channel h _ij Slowly changing over time, e.g. channel h on different OFDM symbols _ij Similarly, the received signal on the OFDM symbol (hereinafter abbreviated OFDM symbol) d where the data is located can be expressed as:

wherein the content of the first and second substances,

CPE introduced for receive side noise on DMRS symbols,

CPE introduced for receiver-side end noise on data symbols, Δ α _i ＝α _i,d -α _i Indicating the phase difference between the CPE on the data symbol and the CPE on the DMRS symbol due to the receiver side noise;

CPE introduced for transmit side phase noise on DMRS symbols,

CPE introduced for transmit side end noise on data symbols, Δ θ _j ＝θ _j,d -θ _j Indicating the phase difference value of CPE on the data symbol and CPE on the DMRS symbol caused by the noise of the transmitting end;

inclusion for DMRS estimation equivalent channel of phase noise.

Assuming an equalization matrix of

Then, the received signal on the data symbol d is equalized to determine an equalized signal, as follows:

wherein the content of the first and second substances,

phase noise of (1) delta theta _i The receiving end can be estimated based on PTRS transmitting and receiving signals on respective transmission layers, and the influence of phase noise is eliminated;

it can be understood as interference introduced between signals of the terminals due to a plurality of different sources of phase noise at the receiving end.

Therefore, when the receiving end has multiple phase noises of different sources and cannot ignore them, the equalization process may introduce interference between terminals, or interference between streams in the terminals may introduce interference, thereby causing degradation of demodulation performance.

Referring to fig. 7, fig. 7 is a communication method provided in the embodiment of the present application, where the method includes, but is not limited to, the following steps:

step S701: the network device determines configuration information for the PTRS.

Step S702: and the network equipment sends the configuration information of the PTRS to the terminal equipment.

Specifically, the configuration information of the PTRS includes a PTRS port number and/or a number of PTRS ports. The multiplexing mode of the PTRS ports is frequency domain code division, and the number of the PTRS ports refers to the number of the frequency domain code division ports or the number of the frequency domain code division PTRS ports. The number of the PTRS ports is greater than or equal to 1. Wherein the number of PTRS ports is less than a predefined threshold, which may be dynamically configured, such as a number of PTRS ports indicating a maximum frequency-domain-capable code division via Radio Resource Control (RRC) signaling. The predefined threshold may be the number of subcarriers corresponding to a channel coherence bandwidth, and the channel coherence bandwidth is a minimum channel coherence bandwidth among the scheduled plurality of terminal devices. If the frequency domain code division is only applied between terminals, such as frequency division of a plurality of PTRS ports in the terminals, the channel coherent bandwidth and the subcarrier spacing determine the maximum number of users which can be scheduled together (the time-frequency space resources of scheduling are the same); if the frequency domain code division is applied between terminals and in the terminals, the channel coherent bandwidth and the subcarrier spacing determine the maximum number of PTRS ports capable of performing the frequency domain code division together. At this time, if the number of the maximum allowed PTRS ports or the number of users is smaller than the number of users to be simultaneously scheduled at the same frequency, the simultaneous scheduling at the same frequency for some users can be realized in a space division manner, that is, a plurality of users are served on the same time-frequency resource by different beams. The channel coherence bandwidth refers to a specific frequency range, channels of any two frequency components in the frequency range have strong correlation, or the channel correlation of any two frequency domain components is greater than a specified or designated threshold, and may be understood as a section of frequency range where the channel correlation satisfies a specific condition.

In an example, it is assumed that there are 4 terminal devices, respectively terminal device 1, terminal device 2, terminal device 3, and terminal device 4, where terminal device 1 has 2 PTRS ports, and the port numbers are port 1 and port 2; the terminal device 2 has 1 PTRS port, the port number is port 3; the terminal device 3 is provided with 2 PTRS ports, and the port numbers are respectively a port 4 and a port 5; the terminal device 4 has 1 PTRS port, and the port number is port 6, so that when the 6 PTRS ports perform frequency domain code division, the PTRS configuration information configured for the first terminal device may include or indicate: (a) two PTRS port numbers, (b) 6 PTRS port numbers; the PTRS configuration information configured to the second terminal device may include or indicate (a) one PTRS port number, (b) the PTRS port number is 6; and the PTRS configuration information of other terminal equipment is analogized.

Specifically, when the network device has at least two physical reception channels, which may be prrus, the PTRS ports between the terminal devices may be distinguished by PTRS port numbers.

The number of the PTRS ports of a single terminal device is related to whether the terminal device reports the capability information of the PTRS ports, and the capability information of the PTRS ports is used for indicating that the terminal device supports M uplink PTRS ports, wherein M is a positive integer. In one example, M =2; in yet another example, M =4.

Step S703: the terminal device receives configuration information of the PTRS from the network device.

After the terminal equipment receives the configuration information of the PTRS from the network equipment, the PTRS is judged to be the configuration informationIf the frequency domain code division is not needed, in an example, the terminal device receives configuration information of the PTRS from the network device, where the number of ports of the PTRS of the frequency domain code division is greater than 1, the terminal device determines that the frequency domain code division is needed, and performs operations of step S704 to step S708. In one example, the terminal device receives configuration information of the PTRS from the network device, wherein the number of ports of the PTRS of the frequency domain code division is equal to 1, and then the terminal device determines that the frequency domain code division is not required according to the time domain density L and the frequency domain density K _int The determined PTRS pattern maps the PTRS sequence.

Step S704: and the terminal equipment determines the PTRS orthogonal code sequence according to the configuration information of the PTRS.

The terminal device may determine an index of the PTRS orthogonal code sequence according to the number of PTRS ports and the number of PTRS ports of the frequency domain code division, and then determine the PTRS orthogonal code sequence according to the index.

Specifically, the terminal device may further receive third indication information from the network device, where the third indication information is used for indicating the PTRS orthogonal code sequence or the orthogonal code sequence set. That is, there may be multiple orthogonal code sequence sets defined in the protocol, and the terminal device may determine which orthogonal code sequence set to use by receiving the third indication information. The terminal device may further determine the number of PTRS ports according to the third indication information. In one example, assuming that the PTRS orthogonal code sequence indicated by the third indication information is 4*4, the number of PTRS ports is 4.

In one example, assume that each terminal device PTRS port number is P _i Number of PTRS ports is N _ptrs Index C of the PTRS orthogonal code sequence _idx Can be determined by the following equation:

C _idx ＝mod(P _i ,N _ptrs ) Or C _idx ＝mod(P _i -1,N _ptrs )+1；

Wherein, C _idx Index, P, representing an orthogonal code sequence _i Indicating PTRS port number, N _ptrs Indicating the number of PTRS ports.

For example, assume the PTRS port number is P ₁ To P ₈ The number of PTRS ports isAt time 8, the PTRS orthogonal code sequence can be as shown in table 3 below:

table 3

P ₁	P ₂	P ₃	P ₄	P ₅	P ₆	P ₇	P ₈
								1	1	1	1	-1	-1	-1	-1
1	1	-1	-1	1	1	-1	-1
								1	1	-1	-1	-1	-1	1	1
1	1	1	1	1	1	1	1
								1	-1	1	-1	1	-1	1	-1
1	-1	-1	1	1	-1	-1	1
								1	-1	-1	1	-1	1	1	-1
1	-1	1	-1	-1	1	-1	1

Step S705: and the terminal equipment generates a PTRS sequence according to the PTRS orthogonal code sequence.

Specifically, the terminal device may generate a pseudo-random sequence according to a predefined rule, and then generate a PTRS sequence according to the PTRS orthogonal code sequence and the pseudo-random sequence. The pseudo-random sequences of different PTRS ports (different port numbers) on the same subcarrier may be the same or different.

In one example, assume that the PTRS port number is P ₁ To P ₈ The number of PTRS ports is 8, the pseudo-random sequences carried by the 8 PTRS ports on the continuous 8 subcarriers may be the same or different, and the pseudo-random sequences generated by the terminal device according to the predefined rule are shown in table 4:

table 4

P ₁

P ₂

P ₃

P ₄

P ₅

P ₆

P ₇

P ₈

Subcarrier 1

a1

a2

a3

a4

a5

a6

a7

a8

Subcarrier

2

b1

b2

b3

b4

b5

b6

b7

b8

Subcarrier

3

c1

c2

c3

c4

c5

c6

c7

c8

Subcarrier

4

d1

d2

d3

d4

d5

d6

d7

d8

Subcarrier

5

e1

e2

e3

e4

e5

e6

e7

e8

Sub-carrier

6

f1

f2

f3

f4

f5

f6

f7

f8

Subcarrier

7

g1

g2

g3

g4

g5

g6

g7

g8

Subcarrier

8

h1

h2

h3

h4

h5

h6

h7

h8

Then, a PTRS sequence is generated by multiplying the PTRS orthogonal code sequence by a pseudo-random sequence (the pseudo-random sequence is divided into a plurality of segments according to the length of the orthogonal code, each segment is the length of the orthogonal code, and each segment is sequentially point-multiplied by the orthogonal code sequence), and assuming that the PTRS orthogonal code sequence is shown in table 3 and the pseudo-random sequence is shown in table 4, the PTRS orthogonal code sequence and the pseudo-random sequence are multiplied to generate the PTRS sequence, which is shown in table 5:

table 5

P ₁

P ₂

P ₃

P ₄

P ₅

P ₆

P ₇

P ₈

Subcarrier 1

a1

a2

a3

a4

-a5

-a6

-a7

-a8

Subcarrier

2

b1

b2

-b3

-b4

b5

b6

-b7

-b8

Subcarrier

3

c1

c2

-c3

-c4

-c5

-c6

c7

c8

Subcarrier

4

d1

d2

d3

d4

d5

d6

d7

d8

Subcarrier

5

e1

-e2

e3

-e4

e5

-e6

e7

-e8

Sub-carrier

6

f1

-f2

-f3

f4

f5

-f6

-f7

f8

Subcarrier

7

g1

-g2

-g3

g4

-g5

g6

g7

-g8

Subcarrier

8

h1

-h2

h3

-h4

-h5

h6

-h7

h8

Step S706: and the terminal equipment maps the PTRS sequence to the time frequency resource according to the PTRS pattern.

Specifically, the terminal device maps the PTRS sequence to the time-frequency resource according to a PTRS pattern, wherein the PTRS pattern comprises a position for mapping the PTRS sequence. With consecutive N on each RB within the system bandwidth or portion thereof _ptrs The subcarriers are used to map PTRS sequences, where each RB comprises 12 subcarriers, N _ptrs Indicating the number of PTRS ports.

Specifically, the terminal device determines the PTRS pattern according to the PTRS port number and/or the number of PTRS ports, as follows:

in a possible implementation manner, the terminal device determines a first index set according to K and the system bandwidth, where the first index set includes indexes of resource blocks RB used for mapping the PTRS sequence in the system bandwidth; k denotes the density of the PTRS pattern in the frequency domain, with PTRS mapped on one RB per K RBs. The terminal device receives a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes an index of an RB allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the terminal device in a system bandwidth. The terminal device determines a third index set by intersecting the first index set and the second index set, wherein an RB corresponding to an index in the third index set is an RB used by the terminal device for mapping the PTRS, and the PTRS is mapped on a plurality of continuous subcarriers in the RB corresponding to the index in the third index set, so that a pattern formed by positions (subcarriers or REs) of the PTRS mapped on the RBs corresponding to all the indexes in the third index set is called a PTRS pattern, that is, the PTRS pattern includes one or more PTRS blocks (i.e., one or more RBs) in a frequency domain, one PTRS block includes a plurality of continuous subcarriers, and the number of continuous subcarriers included in one PTRS block is the same as the number of PTRS ports. This pattern may also be referred to as a partially concentrated PTRS pattern.

Wherein K can be determined in two ways: in the first mode, the terminal device receives second indication information from the network device, wherein the second indication information is used for indicating the value of K; in a second way, K is specified by the protocol.

The terminal device receives first indication information from the network device, wherein the first indication information is used for indicating the index of the RB of the first PTRS block corresponding to the PTRS pattern in the frequency domain. Correspondingly, the terminal device determines a first index set according to the index of the RB of the first PTRS block, the K and the system bandwidth. The index of the RB of the first PTRS block may be determined according to a cell identifier and a partial bandwidth identifier (BWP-Id), in addition to the manner indicated by the first indication information. The index of the RB may be a Virtual Resource Block (VRB) or a Physical Resource Block (PRB).

In one example, assume that a terminal device receives information from a network deviceThe first indication information is used for indicating that the index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain is 1, the protocol specification is K =12, and the system bandwidth is 136 RBs; the terminal device determines a first index set S according to the index of RB of the first PTRS block, K and the system bandwidth _ptrs Wherein S is _ptrs ＝{RB _index0 ，RB _index0 +K，RB _index0 +2*K, … … }, and RB _index0 An index of RB, which indicates the first PTRS block corresponding to the PTRS pattern in the frequency domain, is 1; then the first set of indices S _ptrs = {1,13,25, … …,133}; it is assumed that the terminal device receives a first message from the network device, the first message indicating a second index set, the second index set S _prbi Including the index of RB (resource block) allocated by the network equipment to the physical uplink shared channel or the physical downlink shared channel of the terminal equipment in the system bandwidth, wherein S _prbi = {1,2,3,4, … …,30}; the terminal equipment combines the first index set and the second index set to obtain an intersection to determine a third index set S _ptrsi And =1,13,25, determining the PTRS pattern according to the third index set, that is, determining the PTRS pattern by using the pattern formed by the positions of the PTRS mapped on the RBs corresponding to all the indexes in the third index set, that is, the PTRS pattern. The RB corresponding to an index in the third index set is an RB used by the terminal device to map the PTRS, and the terminal device maps the PTRS on multiple consecutive subcarriers in the RB corresponding to an index in the third index set, as shown in fig. 8, taking the number of PTRS ports as 4 as an example, the PTRS pattern includes 3 PTRS blocks in the frequency domain, and the 3 PTRS blocks are respectively discontinuous among the PTRS blocks on an RB with a sequence number of 1, an RB with a sequence number of 13, and an RB with a sequence number of 25, and one PTRS block includes 4 consecutive subcarriers, where the PTRS blocks may be uniformly distributed on the RBs, for example, one PTRS block is mapped on every K =12 RBs, and the density of the PTRS pattern shown in fig. 8 in the time domain is 1.

In yet another possible implementation manner, the terminal device determines a fourth index set according to K; the fourth index set comprises a set of indexes used for mapping resource blocks, RBs, of the PTRS sequences within the partial bandwidth; k represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the terminal equipment receives a second message from the network equipment, wherein the second message is used for indicating a fifth index set, and the fifth index set comprises indexes of RBs (resource blocks) of a physical uplink shared channel or a physical downlink shared channel which are allocated to the terminal equipment by the network equipment in a part of bandwidth; and the terminal equipment determines a sixth index set by taking the intersection of the fourth index set and the fifth index set, wherein a pattern formed by the positions of the PTRS mapped on the RB corresponding to the indexes in the sixth index set is a PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in one PTRS block is the same as the number of PTRS ports. Wherein the portion of bandwidth is a portion of system bandwidth. K is determined by the partial bandwidth and a first association relationship, where the first association relationship is an association relationship between the number of RBs included in the partial bandwidth and K, and is shown in table 6. The density of the PTRS pattern in the time domain is similar to the K determination method, and is not described herein again. For specific examples, reference may be made to the above description, which is not repeated herein. In this case, the first association relationships of the plurality of terminal devices are the same, and may be the first association relationship corresponding to the terminal device with the worst phase noise.

Table 6

Partial bandwidth	Frequency domain density K
		N _RB ＜N _RB0	Absence of PTRS
N _RB0 ≤N _RB ＜N _RB1	2
		N _RB1 ≤N _RB	4

In yet another possible implementation manner, the terminal device determines a fourth index set according to K; the fourth index set comprises a set of indexes used for mapping resource blocks, RBs, of the PTRS sequences within the partial bandwidth; k represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; and the terminal equipment determines a PTRS pattern according to the fourth index set, wherein the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in one PTRS block is the same as that of the PTRS ports. And K is determined by the partial bandwidth and a first association relation, wherein the first association relation is the association relation between the number of RBs contained in the partial bandwidth and K, and the partial bandwidth comprises a shared bandwidth among a plurality of terminal devices. The shared bandwidth refers to an overlapping bandwidth of a plurality of scheduled terminal devices transmitting a Physical Uplink Shared Channel (PUSCH). The first association relationship between the number of RBs included in the partial bandwidth and K is shown in table 2. In one example, the terminal device determines the frequency domain density K according to the partial bandwidth and the first incidence relation _int ＝2，K＝K _int *N _ptrs ，N _ptrs Indicating the number of PTRS ports. The density of the PTRS pattern in the time domain is similar to the K determination method, and is not described herein again. For specific examples, reference may be made to the above description, which is not repeated herein. In this case, the first association relationships of the plurality of terminal devices are the same, and may be the first association relationship corresponding to the terminal device with the worst phase noise.

In one possible implementation, the PTRS pattern includes one or more PTRS blocks in the frequency domain, one PTRS block including a number of consecutive subcarriers that is less than the number of PTRS ports. Accordingly, in this case, the PTRS ports are multiplexed on the same time-frequency resource by time-frequency domain code division. That is, the same time-frequency resources are occupied, as shown in fig. 9, fig. 9 shows a PTRS pattern, where the PTRS ports of the time-frequency domain code division are port 1, port 2, port 3 and port 4, respectively, that is, the number of the PTRS ports is 4, at this time, the PTRS orthogonal code sequence may be as shown in table 7, where ports 1 to 4 occupy the same time-frequency resources, the PTRS pattern includes a plurality of PTRS blocks in the frequency domain, and one PTRS block includes 2 consecutive subcarriers.

Table 7

The terminal device may generate a pseudo-random sequence according to a predefined rule and then generate a PTRS sequence from the PTRS orthogonal code sequence and the pseudo-random sequence. The pseudo-random sequences of different PTRS ports (different port numbers) at the same time on the same subcarrier may be the same or different.

In one example, assume that the PTRS port number is P ₁ To P ₄ The number of PTRS ports is 4, the pseudo-random sequences carried by the 4 PTRS ports on the consecutive 2 subcarriers may be the same or different, and the pseudo-random sequences generated by the terminal device according to the predefined rule are shown in table 8:

table 8

And then the terminal equipment generates a PTRS sequence according to multiplication of the orthogonal code sequence and the pseudo-random sequence (the pseudo-random sequence is divided into a plurality of sections according to the length of the orthogonal code, the length of each section is the length of the orthogonal code, and each section is sequentially multiplied by the orthogonal code sequence in a point mode). Assuming that the PTRS orthogonal code sequence is shown in table 7 and the pseudo-random sequence is shown in table 8, the PTRS orthogonal code sequence and the pseudo-random sequence are conjugate multiplied to generate a PTRS sequence, which is shown in table 9.

Table 9

The terminal device then maps the PTRS sequence to the time-frequency resource according to a PTRS pattern, which is shown in fig. 9.

Step S707: and the terminal equipment sends the PTRS to the network equipment.

Step S708: and the network equipment receives the PTRS from the terminal equipment on the time-frequency resource according to the PTRS orthogonal code sequence and the PTRS pattern.

Specifically, the network device may determine the PTRS orthogonal code sequence and the PTRS pattern with reference to the terminal device, which is not described herein again.

In a possible implementation manner, after the network device receives the PTRS from the terminal device on the time-frequency resource according to the PTRS orthogonal code sequence and the PTRS pattern, the network device determines a phase difference between a phase noise common phase error CPE on a data symbol of a physical shared uplink channel received by each physical receiving channel and a DMRS symbol of the physical shared uplink channel; and the network equipment compensates the data signals according to the difference between the phase differences corresponding to different physical receiving channels. Wherein, the physical receiving channel may be pRRU.

In an example, assuming that the number of PTRS ports is 2, the network device has two non-homologous phase noise sources, that is, the network device has 2 physical receiving channels, for example, and assuming that the pseudo-random sequences carried by port 1 and port 2 are the same, the PTRS sequences transmitted on port 1 and port 2 on two consecutive subcarriers may be as shown in table 10,

table 10

	Port 1	Port 2
			Subcarrier 1 (RE 1)	a	a
Subcarrier 1 (RE 2)	b	-b

With one of the symbols t ₁ The above received signals are exemplified by:

the received signals on the two REs of the first pRRU are:

wherein, y _1,REi Represents the signal received by the first pRRU on subcarrier i, i =1,2; w is a _1,REi Representing the noise, h, received by the first pRRU on subcarrier i _1j Represents the channel between the first pRRU and port j; j =1,2; s _j，REi Representing the signal transmitted by port j on subcarrier i,

CPE introduced for phase noise on the first pRRU,

to represent the CPE difference introduced at port j by the phase noise of the network device.

The received signals on the two REs of the second pRRU are:

wherein, y _2,REi Represents the signal received by the second pRRU on subcarrier i, i =1,2; w is a _2,REi Representing the noise, h, received by the second pRRU on subcarrier i _2j Represents the channel between the second pRRU and port j; j =1,2; s is _j，REi Representing the signal transmitted by port j on subcarrier i,

CPE introduced for phase noise on the second pRRU,

Since the pseudo-random sequences carried by the port 1 and the port 2 are the same, and the PTRS orthogonal codes are different, the number s is _2,RE1 ＝s _1,RE1 ，s _2,RE2 ＝-s _1,RE2 By combining the above equations, the

An estimate of (d).

Other times may be analogized. If the equivalent channel of the symbol where the DMRS is located is represented as:

then the same sequence as obtained in the above equation

The phase difference between the data symbol or the PTRS symbol and the DMRS symbol, that is, the phase difference between the PTRS symbol equivalent channel and the DMRS symbol equivalent channel, can be obtained by conjugate multiplication of the estimated values, as shown in table 11:

table 11

The difference between the phase differences corresponding to different physical receiving channels is determined by the phase differences in table 8, as shown in the following equation:

compensating the received signal of the ith pRRU for the above-described phase factor, i.e., the difference between the phase differences, before equalization of the received signal, i.e.:

wherein the content of the first and second substances,

CPE introduced for network device phase noise on DMRS symbols,

CPE introduced for network equipment phase noise on data symbols,

representing the phase difference between the CPE on the data symbol and the CPE on the DMRS symbol caused by two paths of phase noises of the network equipment;

CPE introduced for terminal device phase noise on DMRS symbols,

CPE introduced for end-point device phase noise on data symbols,

representing the phase difference between the CPE on the data symbols and the CPE on the DMRS symbols caused by the phase noise of the terminal equipment;

an equivalent channel estimated for the DMRS that contains phase noise.

In the method described in fig. 7, when the network device has multiple physical receiving channels, that is, the network device has multiple paths of different source noises, the terminal device receives PTRS configuration information of the network device, determines a PTRS orthogonal code sequence according to the configuration information, thereby generating a PTRS sequence, maps the PTRS sequence to a time-frequency resource according to a PTRS pattern, and sends the PTRS sequence to the network device, thereby implementing multiplexing of PTRS ports between the terminal devices, eliminating inter-terminal interference and/or inter-terminal interference caused by different source noises of the network device, improving demodulation performance of data, and ensuring lower PTRS overhead of the terminal device and improving spectral efficiency by using the PTRS port in a code division multiplexing manner.

The method of the embodiments of the present application is set forth above in detail and the apparatus of the embodiments of the present application is provided below.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application, where the communication apparatus may be a terminal device or a chip in the terminal device, and the communication apparatus 1000 may include a communication unit 1001 and a processing unit 1002, where details of each unit are described below.

The communication unit 1001 is configured to receive configuration information of a phase tracking reference signal PTRS from a network device, where the configuration information includes a PTRS port number and/or a number of PTRS ports; the processing unit 1002 is configured to determine a PTRS orthogonal code sequence according to the configuration information; the processing unit 1002 is further configured to generate a PTRS sequence according to the PTRS orthogonal code sequence; the processing unit 1002 is further configured to map the PTRS sequences onto time-frequency resources; the communication unit 1001 is further configured to send a PTRS to the network device.

In yet another possible implementation manner, the processing unit 1002 is configured to map the PTRS sequence onto the time-frequency resource according to the PTRS pattern; the PTRS pattern includes a position for mapping the PTRS sequence.

In yet another possible implementation manner, the processing unit 1002 is further configured to determine the PTRS pattern according to the PTRS port number and/or the number of PTRS ports.

In yet another possible implementation manner, the processing unit 1002 is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes used for mapping resource blocks RB of the PTRS sequence within the system bandwidth; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the communication unit 1001 is configured to receive a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the system bandwidth; the processing unit 1002, configured to determine a third index set by intersecting the first index set and the second index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, wherein the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes a plurality of consecutive subcarriers, and a number of consecutive subcarriers included in the one PTRS block is the same as a number of the PTRS ports.

In yet another possible implementation manner, the communication unit 1001 is further configured to receive first indication information from the network device, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processing unit 1002 is configured to determine the first index set according to the index of the RB of the first PTRS block, K, and a system bandwidth.

In yet another possible implementation manner, the communication unit 1001 is further configured to receive second indication information from the network device, where the second indication information is used to indicate a value of K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processing unit 1002 is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the communication unit 1001 is configured to receive a second message from the network device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the partial bandwidth; the processing unit 1002 is configured to determine a sixth index set by intersecting the fourth index set with the fifth index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, and one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the one PTRS block is the same as the number of PTRS ports.

In yet another possible implementation manner, the communication unit 1001 is configured to receive third indication information from the network device, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In another possible implementation manner, the processing unit 1002 is further configured to determine the number of PTRS ports according to the third indication information.

In yet another possible implementation, the PTRS pattern includes one or more PTRS blocks in the frequency domain, one PTRS block including a number of consecutive subcarriers that is less than the number of PTRS ports.

It should be noted that the implementation and beneficial effects of each unit can also correspond to the corresponding description of the method embodiment shown in fig. 7.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application, where the communication apparatus may be a network device or a chip in the network device, and the communication apparatus 1000 may include a communication unit 1001 and a processing unit 1002, where details of each unit are described below.

The processing unit 1002 is configured to determine configuration information of a phase tracking reference signal PTRS; the communication unit 1001 is configured to send configuration information of the PTRS to a terminal device, where the configuration information includes a PTRS port number and/or a number of PTRS ports; the processing unit 1002 is configured to determine, according to the PTRS port number and/or the number of PTRS ports, a PTRS orthogonal code sequence used by the terminal device to generate a PTRS; the communication unit 1001 is configured to receive the PTRS from the terminal device according to the PTRS orthogonal code sequence and the PTRS pattern.

In yet another possible implementation manner, the processing unit 1002 is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes used for mapping resource blocks RB of the PTRS sequence within the system bandwidth; the K represents a density of the PTRS pattern in a frequency domain; one RB in every K RBs is mapped with PTRS; the communication unit 1001 is configured to send a first message to the terminal device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs that are allocated by the network device to the terminal device within the system bandwidth; the processing unit 1002, configured to determine a third index set by intersecting the first index set and the second index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, and one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the one PTRS block is the same as the number of PTRS ports.

In yet another possible implementation manner, the communication unit 1001 is further configured to send, to the terminal device, first indication information, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processing unit 1002 is configured to determine the first index set according to an index of RB of the first PTRS block, K, and a system bandwidth.

In yet another possible implementation manner, the communication unit 1001 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate a value of K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processing unit 1002 is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; the communication unit 1001 is configured to send a second message to the terminal device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to the terminal device in the physical uplink shared channel or the physical downlink shared channel in the partial bandwidth; the processing unit 1002 is configured to determine a sixth index set by intersecting the fourth index set with the fifth index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, and one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the one PTRS block is the same as the number of PTRS ports.

In another possible implementation manner, there are N consecutive indexes in the third index set or N consecutive indexes in the sixth index set on each RB corresponding to the index in the third index set or the index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS; the PTRS is mapped in each RB; wherein, N _ptrs Represents the number of the PTRS ports.

In yet another possible implementation manner, the communication unit 1001 is further configured to send third indication information to the terminal device, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In yet another possible implementation manner, the processing unit 1002 is further configured to determine the number of PTRS ports according to the third indication information.

In yet another possible implementation manner, the processing unit 1002 is further configured to determine a phase difference between a phase-to-noise common phase error CPE on a data symbol of a physical shared uplink channel received by each physical receiving channel and a demodulation reference signal DMRS symbol of the physical shared uplink channel; the processing unit 1002 is further configured to compensate the data signal according to a difference between the phase differences corresponding to different physical receiving channels.

Referring to fig. 11, fig. 11 is a communication apparatus 1100 according to an embodiment of the present disclosure, where the apparatus 1100 includes at least one processor 1101, a communication interface 1103, and optionally a memory 1102, and the processor 1101, the memory 1102, and the communication interface 1103 are connected to each other through a bus 1104.

The memory 1102 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 1102 is used for related computer programs and data. The communication interface 1103 is used to receive and transmit data.

The processor 1101 may be one or more Central Processing Units (CPUs), and in the case where the processor 1101 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1101 in the apparatus 1100 is configured to read the computer program code stored in the memory 1102 and perform the following operations:

receiving configuration information of a Phase Tracking Reference Signal (PTRS) from a network device through the communication interface 1103, the configuration information including a PTRS port number and/or a number of PTRS ports;

determining a PTRS orthogonal code sequence according to the configuration information;

generating a PTRS sequence according to the PTRS orthogonal code sequence;

mapping the PTRS sequence to a time frequency resource;

the PTRS is sent to the network device through the communication interface 1103.

In one possible implementation, the multiplexing of the PTRS ports is for frequency domain code division multiplexing.

In yet another possible implementation, the processor 1101 is configured to map the PTRS sequence onto the time-frequency resource according to the PTRS pattern; the PTRS pattern includes a position for mapping the PTRS sequence.

In yet another possible implementation, the processor 1101 is further configured to determine the PTRS pattern according to the PTRS port number and/or the number of PTRS ports.

In yet another possible implementation, the processor 1101 is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes used for mapping resource blocks RB of the PTRS sequence within the system bandwidth; the K represents a density of the PTRS pattern in a frequency domain, with a PTRS mapped on one RB per K RBs; receiving, by the communication interface 1103, a first message from the network device, the first message indicating a second index set, where the second index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the system bandwidth; and determining a third index set by intersecting the first index set and the second index set, wherein the position of the PTRS mapped on the RB corresponding to the index in the third index set is a PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the one PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, the processor 1101 is further configured to receive, through the communication interface 1103, first indication information from the network device, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processor 1101 is configured to determine the first index set according to the index of RB of the first PTRS block, K, and a system bandwidth.

In yet another possible implementation manner, the processor 1101 is further configured to receive second indication information from the network device through the communication interface 1103, where the second indication information is used to indicate a value of K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processor 1101 is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; receiving, by the communication interface 1103, a second message from the network device, the second message indicating a fifth set of indices, where the fifth set of indices includes a set of indices allocated by the network device to RBs of a physical uplink shared channel or a physical downlink shared channel of the apparatus within the partial bandwidth; and determining a sixth index set by intersecting the fourth index set with the fifth index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, the processor 1101 is configured to receive, through the communication interface 1103, third indication information from the network device, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In yet another possible implementation manner, the processor 1101 is further configured to determine the number of PTRS ports according to the third indication information.

It should be noted that the implementation and beneficial effects of the operations may also correspond to the corresponding descriptions of the method embodiment shown in fig. 7.

Referring to fig. 11, fig. 11 is a communication device 1100 according to an embodiment of the present application, where the device 1100 includes at least one processor 1101, a communication interface 1103, and optionally a memory 1102, and the processor 1101, the memory 1102, and the communication interface 1103 are connected to each other through a bus 1104.

The memory 1102 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 1102 is used for related computer programs and data. The communication interface 1103 is used for receiving and transmitting data.

determining configuration information of a phase tracking reference signal PTRS;

sending configuration information of the PTRS to a terminal device through the communication interface 1103, where the configuration information includes a PTRS port number and/or a number of PTRS ports;

determining a PTRS orthogonal code sequence used by the terminal equipment for generating PTRS according to the PTRS port number and/or the number of the PTRS ports; receiving, by the communication interface 1103, a PTRS from the terminal device according to the PTRS orthogonal code sequence and PTRS pattern.

In yet another possible implementation, the processor 1101 is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes used for mapping resource blocks RB of the PTRS sequence within the system bandwidth; the K represents a density of the PTRS pattern in a frequency domain; one RB in every K RBs is mapped with PTRS; sending a first message to the terminal device through the communication interface 1103, where the first message is used to indicate a second index set, where the second index set includes a set of indexes of RBs, allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the terminal device within the system bandwidth; determining a third index set by taking the intersection of the first index set and the second index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the one PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, the processor 1101 is further configured to send, to the terminal device through the communication interface 1103, first indication information, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain; the processor 1101 is configured to determine the first index set according to the index of RB of the first PTRS block, K, and a system bandwidth.

In yet another possible implementation manner, the processor 1101 is further configured to send second indication information to the terminal device through the communication interface 1103, where the second indication information is used to indicate a value of K.

In yet another possible implementation, the K is specified by a protocol.

In yet another possible implementation manner, the processor 1101 is configured to determine a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS; sending a second message to the terminal device through the communication interface 1103, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to the terminal device in the physical uplink shared channel or the physical downlink shared channel in the partial bandwidth; and determining a sixth index set by intersecting the fourth index set with the fifth index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as the number of the PTRS ports.

In yet another possible implementation manner, there are N consecutive RBs on each RB corresponding to an index in the third index set or an index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS; the PTRS is mapped in each RB; wherein N is _ptrs Represents the number of the PTRS ports.

In yet another possible implementation manner, the processor 1101 is further configured to send, to the terminal device through the communication interface 1103, third indication information, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

In yet another possible implementation manner, the processor 1101 is further configured to determine a phase difference between a phase-to-noise common phase error CPE on a data symbol of a physical shared uplink channel received by each physical receiving channel and a demodulation reference signal DMRS symbol of the physical shared uplink channel; and compensating the data signals according to the difference between the phase differences corresponding to different physical receiving channels.

One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments can be implemented by hardware associated with a computer program that can be stored in a computer-readable storage medium, and when executed, can include the processes of the above method embodiments. And the aforementioned storage medium includes: various media that can store computer program code, such as ROM or RAM, magnetic or optical disks, etc.

Claims

1. A method of communication, comprising:

the terminal equipment maps the PTRS sequence to time frequency resources;

and the terminal equipment sends the PTRS to the network equipment.

2. The method of claim 1, wherein the PTRS ports are multiplexed in a frequency domain code division multiplexing manner.

3. The method according to claim 1 or 2, wherein the terminal device maps the PTRS sequences onto time-frequency resources, comprising:

the terminal equipment maps the PTRS sequence to the time frequency resource according to the PTRS pattern; the PTRS pattern includes a position for mapping the PTRS sequence.

4. The method of claim 3, further comprising:

the terminal equipment determines the PTRS pattern according to the PTRS port number and/or the number of the PTRS ports.

5. The method according to claim 4, wherein the terminal device determines the PTRS pattern according to the PTRS port number and/or the number of PTRS ports, comprising:

the terminal equipment determines a first index set according to K and a system bandwidth, wherein the first index set comprises a set of indexes used for mapping Resource Blocks (RBs) of the PTRS sequences in the system bandwidth; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS;

the terminal device receives a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the terminal device within the system bandwidth;

the terminal device determines a third index set by taking the intersection of the first index set and the second index set, wherein a pattern formed by positions of PTRS mapped on RB corresponding to indexes in the third index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as the number of the PTRS ports.

6. The method of claim 5, further comprising:

the terminal equipment receives first indication information from the network equipment, wherein the first indication information is used for indicating an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain;

the terminal device determines a first index set according to K and a system bandwidth, and the method comprises the following steps:

and the terminal equipment determines the first index set according to the index of the RB of the first PTRS block, the K and the system bandwidth.

7. The method of claim 5 or 6, further comprising:

and the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating the value of the K.

8. The method according to any of claims 1-4, wherein the terminal device determines the PTRS pattern according to the PTRS port number and/or the number of PTRS ports, comprising:

the terminal equipment determines a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS;

the terminal device receives a second message from the network device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to the terminal device in the physical uplink shared channel or the physical downlink shared channel in the partial bandwidth;

the terminal device determines a sixth index set by intersecting the fourth index set with the fifth index set, wherein a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, the PTRS pattern comprises one or more PTRS blocks in a frequency domain, one PTRS block comprises a plurality of continuous subcarriers, and the number of the continuous subcarriers in the PTRS block is the same as the number of the PTRS ports.

9. The method of claim 8, wherein K is determined by the fractional bandwidth and a first association relationship, wherein the first association relationship is an association relationship between K and the number of RBs included in the fractional bandwidth, and wherein the fractional bandwidth comprises a shared bandwidth among a plurality of terminal devices.

10. The method according to any one of claims 5-9, comprising:

there are N consecutive on each RB corresponding to an index in the third index set or an index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS sequence; the PTRS is mapped in each RB; wherein N is _ptrs Represents the number of the PTRS ports.

11. The method according to any one of claims 1-10, further comprising:

the terminal device receives third indication information from the network device, wherein the third indication information is used for indicating the PTRS orthogonal code sequence or the orthogonal code sequence set.

12. The method of claim 11, further comprising:

and the terminal equipment determines the number of the PTRS ports according to the third indication information.

13. The method of any of claims 1-4, wherein the PTRS pattern comprises one or more PTRS blocks in the frequency domain, wherein a PTRS block comprises a number of consecutive subcarriers, and wherein the number of consecutive subcarriers is smaller than the number of PTRS ports.

14. The method according to any of claims 1-13, wherein the number of PTRS ports is greater than 1.

15. A method of communication, comprising:

the network equipment determines configuration information of a phase tracking reference signal PTRS;

the network equipment sends configuration information of the PTRS to terminal equipment, wherein the configuration information comprises PTRS port numbers and/or the number of the PTRS ports;

the network equipment determines a PTRS orthogonal code sequence used by the terminal equipment for generating PTRS according to the PTRS port number and/or the number of the PTRS ports;

the network device receives the PTRS from the terminal device according to the PTRS orthogonal code sequence and the PTRS pattern.

16. A communication device, comprising a communication unit and a processing unit,

the communication unit is used for receiving configuration information of a phase tracking reference signal PTRS from network equipment, wherein the configuration information comprises a PTRS port number and/or the number of the PTRS ports;

the processing unit is used for determining a PTRS orthogonal code sequence according to the configuration information;

the processing unit is further configured to generate a PTRS sequence from the PTRS orthogonal code sequence;

the processing unit is further configured to map the PTRS sequence to a time-frequency resource;

the communication unit is further configured to send a PTRS to the network device.

17. The apparatus of claim 16, wherein the PTRS ports are multiplexed in a frequency domain code division multiplexing.

18. The apparatus of claim 16 or 17,

the processing unit is used for mapping the PTRS sequences onto the time-frequency resources according to PTRS patterns; the PTRS pattern includes a position for mapping the PTRS sequence.

19. The apparatus of claim 18,

the processing unit is further configured to determine the PTRS pattern according to the PTRS port number and/or the number of PTRS ports.

20. The apparatus of claim 19,

the processing unit is configured to determine a first index set according to K and a system bandwidth, where the first index set includes a set of indexes used for mapping resource blocks, RBs, of the PTRS sequence within the system bandwidth; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS;

the communication unit is configured to receive a first message from the network device, where the first message is used to indicate a second index set, and the second index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the system bandwidth;

the processing unit is configured to determine a third index set by intersecting the first index set and the second index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the third index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the one PTRS block is the same as the number of PTRS ports.

21. The apparatus of claim 20,

the communication unit is further configured to receive first indication information from the network device, where the first indication information is used to indicate an index of an RB of a first PTRS block corresponding to the PTRS pattern in a frequency domain;

the processing unit is configured to determine the first index set according to an index of an RB of the first PTRS block, K, and a system bandwidth.

22. The apparatus of claim 20 or 21,

the communication unit is further configured to receive second indication information from the network device, where the second indication information is used to indicate a value of the K.

23. The apparatus according to any one of claims 16 to 19,

the processing unit is used for determining a fourth index set according to K; the fourth set of indices comprises a set of indices within a partial bandwidth for mapping resource blocks, RBs, of the PTRS sequence; the K represents the density of the PTRS pattern in a frequency domain, and one RB in every K RBs is mapped with the PTRS;

the communication unit is configured to receive a second message from the network device, where the second message is used to indicate a fifth index set, where the fifth index set includes a set of indexes of RBs allocated by the network device to a physical uplink shared channel or a physical downlink shared channel of the apparatus within the partial bandwidth;

the processing unit is configured to determine a sixth index set by intersecting the fourth index set with the fifth index set, where a pattern formed by positions of PTRS mapped on RBs corresponding to indexes in the sixth index set is the PTRS pattern, where the PTRS pattern includes one or more PTRS blocks in a frequency domain, one PTRS block includes multiple consecutive subcarriers, and the number of consecutive subcarriers included in the PTRS block is the same as the number of PTRS ports.

24. The apparatus of claim 23, wherein K is determined by the fractional bandwidth and a first association relationship, wherein the first association relationship is an association relationship between K and the number of RBs included in the fractional bandwidth, and wherein the fractional bandwidth comprises a shared bandwidth among a plurality of terminal devices.

25. The apparatus of any one of claims 20-24,

there are N consecutive on each RB corresponding to an index in the third index set or an index in the sixth index set _ptrs The subcarriers are used for mapping the PTRS sequence; the PTRS is mapped in each RB; wherein N is _ptrs Representing the number of the PTRS ports.

26. The apparatus of any one of claims 16-25,

the communication unit is configured to receive third indication information from the network device, where the third indication information is used to indicate the PTRS orthogonal code sequence or the set of orthogonal code sequences.

27. The apparatus of claim 26,

the processing unit is further configured to determine the number of PTRS ports according to the third indication information.

28. The apparatus of any of claims 16-19, wherein the PTRS pattern comprises one or more PTRS blocks in the frequency domain, wherein a PTRS block comprises a number of consecutive subcarriers, wherein the number of consecutive subcarriers is less than the number of PTRS ports.

29. The apparatus according to any of claims 16-28, wherein the number of PTRS ports is greater than 1.

30. A communication device, comprising a communication unit and a processing unit,

the processing unit is used for determining configuration information of a Phase Tracking Reference Signal (PTRS);

the communication unit is used for sending configuration information of the PTRS to the terminal equipment, wherein the configuration information comprises a PTRS port number and/or the number of the PTRS ports;

the processing unit is used for determining a PTRS orthogonal code sequence used by the terminal equipment for generating PTRS according to the PTRS port number and/or the number of the PTRS ports;

the communication unit is used for receiving the PTRS from the terminal equipment according to the PTRS orthogonal code sequence and the PTRS pattern.

31. A communications apparatus, comprising at least one processor configured to invoke a computer program or instructions stored in memory to cause the method of any of claims 1 to 14 to be implemented.

32. A communications apparatus, comprising at least one processor configured to invoke a computer program or instructions stored in memory to cause the method of claim 15 to be implemented.

33. A computer-readable storage medium, having stored thereon a computer program or instructions for causing a computer to perform the method of any one of claims 1 to 15.