WO2022027507A1 - 一种参考信号序列生成方法及装置 - Google Patents

一种参考信号序列生成方法及装置 Download PDF

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Publication number
WO2022027507A1
WO2022027507A1 PCT/CN2020/107561 CN2020107561W WO2022027507A1 WO 2022027507 A1 WO2022027507 A1 WO 2022027507A1 CN 2020107561 W CN2020107561 W CN 2020107561W WO 2022027507 A1 WO2022027507 A1 WO 2022027507A1
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Prior art keywords
symbol
dmrs
sequence
time slot
symbol position
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PCT/CN2020/107561
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English (en)
French (fr)
Inventor
焦春旭
苏宏家
米翔
卢磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/107561 priority Critical patent/WO2022027507A1/zh
Priority to CN202080104726.3A priority patent/CN116250318A/zh
Publication of WO2022027507A1 publication Critical patent/WO2022027507A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method and apparatus for generating a reference signal sequence.
  • phase noise In high-frequency communication, its spectral characteristics lead to the existence of phase noise in the signal transmission process.
  • the phase noise changes rapidly in the time domain, while the change in the frequency domain is relatively gentle.
  • the base station will send a downlink (downlink, DL) phase tracking reference signal (phase tracking reference signal) to the UE. reference signal, PT-RS), the UE performs uplink transmission based on the received measurement result of the PT-RS.
  • the UE will send an uplink (uplink, UL) PT-RS to the base station, and the base station will perform downlink transmission based on the received measurement result of the PT-RS, so that high-speed high-frequency communication can be realized.
  • the UE can send the SL PT-RS, and the UE on the receiving side can track the phase noise with high accuracy based on the measurement results of the received PT-RS, so that in the SL communication scenario High-speed high-band communication can also be achieved.
  • the current 3GPP R16 protocol version only defines the resource mapping method of SL PT-RS, but its sequence generation method is not perfect, which will cause the problem of inconsistency in the generation of SL PT-RS sequences between the transmitting end UE and the receiving end UE.
  • the UE at the receiving end cannot accurately receive the SL PT-RS and perform phase tracking, which has a huge impact on the quality of high-frequency communication.
  • the present application provides a method and device for generating a reference signal sequence to solve the problem of inaccurate phase tracking in an SL communication scenario.
  • the present application provides a method for generating a reference signal sequence, and the method can be applied to a terminal device, or a chip, or a chipset, or a functional module in a chip that executes the method, and so on.
  • the method includes: the first terminal device generates a PT-RS sequence according to a demodulation reference signal (DMRS) sequence corresponding to the symbol position, and sends the PT-RS sequence to the second terminal device.
  • the symbol position is related to the symbol used to transmit the second-level sidelink control information (SCI), or the symbol position is related to a DMRS-carrying symbol in the slot, or the symbol position is a fixed one in the slot. Symbol location.
  • DMRS demodulation reference signal
  • the UE at the transmitting end and the UE at the receiving end can perform phase tracking based on the same PT-RS sequence, thereby improving the accuracy of the phase tracking and further improving the SL communication quality in high frequency bands.
  • the symbol position may be the position of the DMRS symbol corresponding to the first symbol of the second-level SCI.
  • the symbol position may also be the position of the first symbol of the second-level SCI.
  • the sequence generation process of the PT-RS is associated with the first symbol of the second-level SCI, which can avoid the problem of confusion in the position of the DMRS.
  • the symbol position may be the position of the last DMRS-carrying symbol in the time slot; alternatively, the symbol position may also be the position of the last actually mapped DMRS symbol in the time slot; The last DMRS symbol is occupied by signals other than DMRS, and the symbol position may also be the position of the penultimate column of DMRS symbols in the time slot.
  • the sequence generation process of the PT-RS is associated with the symbol actually carrying the DMRS, which can avoid the problem of confusion in the position of the DMRS.
  • the symbol position may be the position of the first DMRS-carrying symbol in the time slot; alternatively, the symbol position may also be the position of the first actually mapped DMRS symbol in the time slot.
  • the sequence generation process of the PT-RS is associated with the symbol actually carrying the DMRS, so as to avoid the problem of confusion in the location of the DMRS.
  • the symbol position may be the position of the first symbol in the time slot, and the offset value of the first symbol relative to the position of the first symbol of the sideline transmission resource is a preset value.
  • the sequence generation process of the PT-RS is associated with the symbols of the fixed position, which can avoid the problem of confusion in the position of the DMRS.
  • the DMRS sequence corresponding to the symbol position may be the DMRS sequence carried by the symbol corresponding to the symbol position.
  • the PT-RS sequence is determined according to the DMRS sequence carried by the symbol corresponding to the symbol position, which can reduce computational overhead.
  • the DMRS sequence corresponding to the symbol position may also be a DMRS sequence generated according to the symbol position.
  • the PT-RS sequence is generated according to the symbol position, which can improve the accuracy of the PT-RS sequence.
  • the present application provides a DMRS time-domain pattern configuration method, which can be applied to a network device, or a chip, or a chipset, or a functional module in a chip that executes the method, and so on.
  • the method includes: the network device determines a first set according to first configuration information, where the first configuration information is used to configure a period of the PSFCH.
  • the first set includes at least one candidate set, wherein the candidate set includes the number of symbols corresponding to at least one DMRS time-domain pattern.
  • the period of the PSFCH is non-zero, the number of symbols included in any candidate set included in the first set is greater than one.
  • the network device sends the first configuration information and the second configuration information to the first terminal device, where the second configuration information is used to determine the second set in the first set, and the second set includes the number of symbols corresponding to at least one DMRS time domain pattern respectively.
  • the UE at the transmitting end can use another DMRS time domain pattern to communicate with the UE at the receiving end, so that the last DMRS symbol can be prevented from being replaced by the GAP symbol immediately after the PSSCH, Either the AGC symbol immediately before the PSFCH, or the symbol occupied by the PSFCH, or any one of the GAP symbols immediately after the PSFCH is removed, so that the transmitting end UE and the receiving end UE generate a consistent SL PT-RS sequence, so that the receiving end
  • the UE can accurately receive the PT-RS sequence, thereby improving the accuracy of phase tracking and improving the quality of SL communication in high frequency bands.
  • the present application provides a DMRS time-domain pattern configuration method, which can be applied to a terminal device, or a chip, or a chipset, or a functional module in a chip that executes the method, and so on.
  • the method includes: the first terminal device receives the first configuration information and the second configuration information.
  • the first configuration information is used to configure the period of the PSFCH.
  • the first set includes at least one candidate set, wherein the candidate set includes the number of symbols corresponding to at least one DMRS time-domain pattern. When the period of the PSFCH is non-zero, the number of symbols included in any candidate set included in the first set is greater than one.
  • the second configuration information is used to determine a second set in the first set, where the second set includes the number of symbols corresponding to at least one DMRS time-domain pattern.
  • the first terminal device determines a first set according to the first configuration information, determines a second set in the first set according to the second configuration information, and determines a DMRS time domain pattern that can be used for SL transmission according to the second set.
  • the UE at the transmitting end can use another DMRS time domain pattern to communicate with the UE at the receiving end, so that the last DMRS symbol can be prevented from being replaced by the GAP symbol immediately after the PSSCH, Either the AGC symbol immediately before the PSFCH, or the symbol occupied by the PSFCH, or any one of the GAP symbols immediately after the PSFCH is removed, so that the transmitting end UE and the receiving end UE can generate a consistent SL PT-RS sequence, thereby receiving The end UE can accurately receive the PT-RS sequence, thereby improving the accuracy of phase tracking and improving the quality of SL communication in high frequency bands.
  • the first terminal device may use the DMRS time domain corresponding to a certain number of symbols in the first set pattern, there are PSFCH resources in the time slot, and the first terminal device can use the DMRS time domain pattern corresponding to another symbol number in the first set.
  • the UE at the transmitting end can use another DMRS time domain pattern to communicate with the UE at the receiving end, so that the last DMRS symbol can be avoided by the GAP next to the PSSCH.
  • the symbol, or the AGC symbol immediately before the PSFCH, or the symbol occupied by the PSFCH, or any one of the GAP symbols immediately after the PSFCH is removed.
  • the present application provides a method for generating a reference signal sequence, and the method can be applied to a terminal device, or a chip, or a chipset, or a functional module in a chip that executes the method, and so on.
  • the method includes: the second terminal device generates a first phase tracking reference signal PT-RS sequence according to a demodulation reference signal DMRS sequence corresponding to a symbol position, and the symbol position is used for transmitting the second-level lateral line.
  • the symbol of the link control information SCI is related, or, the symbol position is related to a symbol carrying DMRS in the time slot, or, the symbol position is a fixed symbol position in the time slot;
  • the second PT-RS sequence of the terminal device; the second terminal device performs phase tracking according to the first PT-RS sequence and the second PT-RS sequence.
  • the UE at the transmitting end and the UE at the receiving end can perform phase tracking based on the same PT-RS sequence, thereby improving the accuracy of the phase tracking and further improving the SL communication quality in high frequency bands.
  • the symbol position may be the position of the DMRS symbol corresponding to the first symbol of the second-level SCI.
  • the symbol position may also be the position of the first symbol of the second-level SCI.
  • the sequence generation process of the PT-RS is associated with the first symbol of the second-level SCI, which can avoid the problem of confusion in the position of the DMRS.
  • the symbol position may be the position of the last DMRS-carrying symbol in the time slot; alternatively, the symbol position may also be the position of the last actually mapped DMRS symbol in the time slot; The last DMRS symbol is occupied by signals other than DMRS, and the symbol position may also be the position of the penultimate column of DMRS symbols in the time slot.
  • the sequence generation process of the PT-RS is associated with the symbol actually carrying the DMRS, so as to avoid the problem of confusion in the location of the DMRS.
  • the symbol position may be the position of the first DMRS-carrying symbol in the time slot; alternatively, the symbol position may also be the position of the first actually mapped DMRS symbol in the time slot.
  • the sequence generation process of the PT-RS is associated with the symbol actually carrying the DMRS, so as to avoid the problem of confusion in the location of the DMRS.
  • the symbol position may be the position of the first symbol in the time slot, and the offset value of the first symbol relative to the position of the first symbol of the sideline transmission resource is a preset value.
  • the sequence generation process of the PT-RS is associated with the symbols of the fixed position, which can avoid the problem of confusion in the position of the DMRS.
  • the DMRS sequence corresponding to the symbol position may be the DMRS sequence carried by the symbol corresponding to the symbol position.
  • the PT-RS sequence is determined according to the DMRS sequence carried by the symbol corresponding to the symbol position, which can reduce computational overhead.
  • the DMRS sequence corresponding to the symbol position may also be a DMRS sequence generated according to the symbol position.
  • the PT-RS sequence is generated according to the symbol position, which can improve the accuracy of the PT-RS sequence.
  • an embodiment of the present application provides a communication apparatus, and the apparatus may be a terminal device, or a chip or a module in the terminal device.
  • the apparatus may include a processing unit, a transceiving unit and a receiving unit. It should be understood that, the sending unit and the receiving unit may also be combined and referred to as a transceiver unit.
  • the processing unit may be a processor, and the transmitting unit and the receiving unit may be transceivers;
  • the communication device may further include a storage unit, which may be a memory; the storage unit is used for storing instructions , the processing unit executes the instructions stored in the storage unit, so that the terminal device executes the method in the first aspect or any possible design of the first aspect, or, so that the terminal device executes the third aspect or any of the third aspect A method in a possible design, or, to make the terminal device execute the fourth aspect or the method in any possible design of the fourth aspect.
  • the processing unit may be a processor, and the sending unit and the receiving unit may be input/output interfaces, pins or circuits, etc.; the processing unit executes the instructions stored in the storage unit to Make the chip perform the method in the first aspect or any possible design of the first aspect, or make the chip perform the method in the third aspect or any possible design of the third aspect, or make the chip perform The chip performs the method of the fourth aspect or any possible design of the fourth aspect.
  • the storage unit is used to store instructions, and the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the terminal device located outside the chip (for example, a read-only memory, random access memory, etc.).
  • an embodiment of the present application provides a communication apparatus, and the apparatus may be a network device, or a chip or a module in the network device.
  • the apparatus may include a processing unit, a transceiving unit and a receiving unit. It should be understood that, the sending unit and the receiving unit may also be combined and referred to as a transceiver unit.
  • the processing unit may be a processor, and the sending unit and the receiving unit may be transceivers;
  • the communication device may further include a storage unit, which may be a memory; the storage unit is used for storing instructions , the processing unit executes the instructions stored in the storage unit, so that the network device executes the method in the second aspect or any possible design of the second aspect.
  • the processing unit may be a processor, the sending unit and the receiving unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to The chip is caused to perform the method of the second aspect or any possible design of the second aspect.
  • the storage unit is used to store instructions, and the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the terminal device located outside the chip (for example, a read-only memory, random access memory, etc.).
  • an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program runs on a computer, the computer is made to execute the above-mentioned first to fourth aspects The method of any one of the aspects.
  • embodiments of the present application further provide a computer program product including a computer program, which, when running on a computer, enables the computer to execute the method described in any one of the first to fourth aspects.
  • a communication apparatus including: a processor, a communication interface and a memory.
  • the communication interface is used to transfer information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus performs the method as described in the first aspect and any possible designs thereof, or A method as described in the above third aspect and any possible design thereof or as in the above fourth aspect and any possible design thereof.
  • a communication apparatus including: a processor, a communication interface, and a memory. Communication interfaces are used to transfer information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the apparatus to perform the method described in the second aspect and any possible designs thereof.
  • an embodiment of the present application provides a chip, wherein the chip is coupled to a memory, and performs the method described in the first aspect and any possible design thereof or the third aspect and any possible design thereof.
  • an embodiment of the present application provides a chip, wherein the chip is coupled with a memory, and performs the method described in the second aspect and any possible designs thereof.
  • Coupled in the embodiments of the present application means that two components are directly or indirectly combined with each other.
  • an embodiment of the present application provides a chip, including a communication interface and at least one processor, wherein the processor obtains computer program instructions through the communication interface and runs them to execute the above-mentioned first aspect and any possible design procedures thereof.
  • the processor obtains computer program instructions through the communication interface and runs them to execute the above-mentioned first aspect and any possible design procedures thereof.
  • an embodiment of the present application provides a chip, including a communication interface and at least one processor, wherein the processor obtains computer program instructions through the communication interface and runs them to execute the above-mentioned second aspect and any possible design procedures thereof. method described.
  • FIG. 1 is a schematic diagram of a multiplexing structure of a PSCCH and a PSSCH according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a time domain pattern of a PSSCH DMRS provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a multiplexing structure of a PSCCH, a PSSCH and a PSFCH according to an embodiment of the present application;
  • FIG. 4 is a schematic diagram of a communication scenario provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a transmitting end UE according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a receiving end UE according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a time domain pattern of PSSCH DMRS provided by an embodiment of the present application A schematic diagram of a time domain pattern of PSSCH DMRS;
  • FIG. 9 is a schematic diagram of a time domain pattern of another PSSCH DMRS provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a time domain pattern of yet another PSSCH DMRS provided by an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of a method for generating a reference signal sequence according to an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of a method for configuring a DMRS time-domain pattern provided by an embodiment of the present application
  • FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • PSCH Physical sidelink control channel
  • PSSCH Physical sidelink shared channel
  • PFCH Physical sidelink feedback channel
  • HARQ hybrid automatic repeat request
  • PSSCH demodulation reference signal (demodulation reference signal, DMRS): a reference signal used to demodulate the physical layer data of the SL.
  • Uu interface the communication interface between the user equipment and the base station.
  • PC5 interface (PC5 interface): the communication interface between the user equipment and the user equipment.
  • Resource pool a collection of time-frequency resources.
  • the specific form is a set corresponding to a plurality of OFDM symbols in the time domain and a plurality of consecutive physical resource blocks in the frequency domain.
  • the resource pool for SL communication refers to a collection of time-frequency resources available for SL transmission.
  • Sub-channel a collection of multiple physical resource blocks (PRBs) in the frequency domain.
  • PRBs physical resource blocks
  • the configuration information of the resource pool includes the configuration information of the PSCCH, and the configuration information of the PSCCH further includes the number of orthogonal frequency-division multiplexing (orthogonal frequency-division multiplexing, OFDM) symbols in the time domain and the number of PRBs in the frequency domain.
  • the time domain starting position of the PSCCH is the first OFDM symbol in the SL transmission resource except the automatic gain control (AGC) symbol; the frequency domain starting position of the PSCCH is the first OFDM symbol in the SL transmission resource.
  • AGC automatic gain control
  • First PRB Specifically, a schematic diagram of a multiplexing structure of PSCCH and PSSCH in a single PSCCH and PSSCH transmission may be as shown in FIG. 1 .
  • the AGC symbol is used for the gain adjustment on the hardware at the receiving end, and will occupy the first OFDM symbol in the SL transmission resource.
  • the GAP (ie gap) symbol is used to realize the transmission and reception conversion at the UE end, and will occupy the last OFDM symbol in the SL transmission resource.
  • the time domain starting position of PSCCH is the same as that of PSSCH.
  • PSCCH and PSSCH are frequency division multiplexing (frequency division multiplexing). , FDM).
  • the starting position of the frequency domain of the PSCCH is the same as the starting position of the frequency domain of the PSCCH.
  • the PSCCH and the PSSCH are time division multiplexing (time division multiplexing, TDM). )of.
  • Time domain pattern of PSSCH DMRS in order to demodulate SL data correctly, PSSCH DMRS needs to be used.
  • the time domain pattern of PSSCH DMRS is indicated by the following steps:
  • the network device sends the configuration information of the resource pool, where the configuration information of the resource pool includes a first set, and the first set is a set of the number of symbols corresponding to the time domain pattern of the PSSCH DMRS.
  • the first set may be configured as one of a number of preconfigured sets, for example, the first set may be configured as one of the following sets: ⁇ 2 ⁇ , ⁇ 3 ⁇ , ⁇ 4 ⁇ , ⁇ 2,3 ⁇ , ⁇ 2 ,4 ⁇ , ⁇ 3,4 ⁇ , ⁇ 2,3,4 ⁇ .
  • the UE at the transmitting end sends sidelink control information (SCI) to the UE at the receiving end, where the SCI includes the indication information of the time domain pattern of the PSSCH DMRS, and the indication information of the time domain pattern of the PSSCH DMRS is used to indicate the first The number of symbols corresponding to the time domain pattern of a PSSCH DMRS in the set.
  • the first set is configured as ⁇ 2, 3, 4 ⁇ , and the indication information of the time domain pattern of the PSSCH DMRS may indicate that the number of symbols corresponding to the time domain pattern of one PSSCH DMRS in the first set is 3.
  • the UE at the transmitting end and/or the UE at the receiving end may determine the time domain position of the PSSCH DMRS symbol through Table 1, that is, determine the time domain pattern of the PSSCH DMRS.
  • 1 d represents the total length of OFDM symbols corresponding to PSSCH and associated PSCCH and AGC symbols, represents the time domain location of PSSCH DMRS,
  • the value range of is ⁇ 0,1,...,ld -1 ⁇ .
  • the time domain pattern of PSSCH DMRS can be as follows: shown in Figure 2.
  • the configuration information of the resource pool may further include the configuration information of the PSFCH, and the configuration information of the PSFCH may further include the period of the PSFCH.
  • the multiplexing structure of the PSCCH and the PSSCH may be as shown in FIG. 1 . If there is a PSFCH resource in the time slot, a schematic diagram of the multiplexing structure of PSCCH, PSSCH and PSFCH in the time slot may be as shown in FIG. 3 .
  • the PSFCH occupies one OFDM symbol, a dedicated AGC symbol is required before the PSFCH, and a dedicated GAP symbol is required after the PSFCH. Therefore, when there are PSFCH resources in the time slot, three OFDM symbols will be additionally occupied in the time slot, and these three OFDM symbols are the last three OFDM symbols in the time slot.
  • the method provided in this application can be applied to a 5G new radio (new radio, NR) unlicensed (Unlicensed) system, or can also be applied to other communication systems, for example, an internet of things (Internet of things, IoT) system, Vehicle-to-everything (V2X) system, narrowband internet of things (NB-IoT) system, long term evolution (LTE) system, and fifth generation (5G) communication
  • IoT internet of things
  • V2X Vehicle-to-everything
  • NB-IoT narrowband internet of things
  • LTE long term evolution
  • 5G fifth generation
  • the system can also be a hybrid architecture of LTE and 5G, or a 5G new radio (NR) system, and a new communication system that will appear in future communication development.
  • the application scenarios of the embodiments of the present application may be SL scenarios, including V2X scenarios, device-to-device communication (device to device, D2D) communication scenarios, and the like.
  • FIG. 4 shows a schematic diagram of a scenario by taking a vehicle-to-vehicle (Vehicle to Vehicle, V2V) scenario as an example.
  • the scenario may include a transmitter UE and a receiver UE, which can be described as a first terminal device and a second terminal device respectively.
  • the transmitter UE and the receiver UE in FIG. 4 both take the vehicle UE as an example.
  • the transmitter in the actual application scenario The UE and the receiving end UE may be terminal devices of any form, or terminal devices of any form carried in the vehicle.
  • a terminal may be a device that provides voice and/or data connectivity to a user, eg, a handheld device with wireless connectivity, a vehicle-mounted device, and the like.
  • the terminal may also be other processing device connected to the wireless modem.
  • a terminal can communicate with one or more core networks through a radio access network (RAN).
  • RAN radio access network
  • a terminal may also be referred to as a wireless terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, Remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), user equipment (user device), or user equipment (user equipment, UE) and so on.
  • Terminal devices may be mobile terminals, such as mobile phones (or “cellular" phones) and computers with mobile terminals, for example, may be portable, pocket-sized, hand-held, computer-built, or vehicle-mounted mobile devices, which are associated with wireless The access network exchanges language and/or data.
  • the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Common terminal devices include, for example, mobile phones, tablet computers, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, and smart home appliances, such as smart A refrigerator, a smart washing machine, etc., but the embodiments of the present application are not limited thereto.
  • MIDs mobile internet devices
  • wearable devices such as smart watches, smart bracelets, pedometers
  • smart home appliances such as smart A refrigerator, a smart washing machine, etc.
  • the terminal equipment can be divided into a transmitting side UE and a receiving side UE.
  • the transmitting end UE is a signal transmitting entity in the SL scenario, and the transmitted signals may include data signals and reference signals (eg, SL phase tracking reference signal (SL PT-RS)) and the like.
  • the sending end UE may include a processing module and a communication module, as shown in FIG. 5 .
  • the processing module can be used to process algorithms, software, programs, storage, etc. involved in the communication process.
  • the communication module may include a sending module and a receiving module, the sending module is used for sending wireless signals, and the receiving module is used for receiving wireless signals.
  • the receiving end UE is a signal receiving entity in the SL scenario, and the received signals may include data signals and reference signals (eg, SL PT-RS) and the like.
  • the receiving UE can perform phase tracking according to the received SL PT-RS to improve the communication quality in the high frequency band.
  • the receiving end UE may include a processing module and a communication module, as shown in FIG. 6 .
  • the processing module can be used to process algorithms, software, programs, storage, etc. involved in the communication process.
  • the communication module may include a sending module and a receiving module, the sending module is used for sending wireless signals, and the receiving module is used for receiving wireless signals.
  • the network device involved in the embodiments of the present application is an entity on the network side that is used to transmit or receive signals, and can be used to convert the received air frame and the network protocol (internet protocol, IP) packet to each other, as the A router between a terminal device and the rest of the access network, which may include an IP network and the like.
  • the network device may also coordinate attribute management of the air interface.
  • the network device may be an evolved base station (evolutional Node B, eNB or e-NodeB) in LTE, or a new radio controller (NR controller), or a gNode B (gNB) in the 5G system.
  • eNB evolved base station
  • NR controller new radio controller
  • gNode B gNode B
  • a network device can be a centralized unit, can be a new wireless base station, can be a remote radio module, can be a micro base station, can be a relay, can be a distributed unit, It may be a reception point (transmission reception point, TRP) or a transmission point (transmission point, TP) or any other wireless access device, but the embodiment of the present application is not limited thereto.
  • a network device can cover one or more cells.
  • the network device may be the configuration entity for SL communication.
  • the network device will configure the resource pool for SL communication through radio resource control (radio resource control, RRC) signaling.
  • the configuration information in the resource pool will affect the sending and/or receiving parameters during SL communication between the UE on the sending end and the UE on the receiving end.
  • the network device may include a processing module and a communication module, as shown in FIG. 7 .
  • the processing module can be used to process algorithms, software, programs, storage, etc. involved in the communication process.
  • the communication module may include a sending module and a receiving module, the sending module is used for sending wireless signals, and the receiving module is used for receiving wireless signals.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the wireless communication system has undergone the technological evolution from the first generation of analog communication to 5G NR, and the wireless frequency band used is gradually evolving from the low frequency band around 6GHz alone to the simultaneous use of the low frequency band and the high frequency band above 20GHz.
  • the low frequency band and the high frequency band are respectively defined as frequency range 1 (frequency range 1, FR1) and frequency range 2 (frequency range 2, FR2), and the represented frequency ranges can be shown in Table 2.
  • Frequency range identification Frequency Range FR1 410MHz–7125MHz FR2 24250MHz–52600MHz
  • phase noise Phase noise
  • the base station will send a downlink (DL) PT-RS to the UE, and the UE will send an uplink (uplink) to the base station.
  • DL downlink
  • uplink uplink
  • UL uplink
  • UE On the PC5 interface that communicates between UE and UE, such as SL scenarios such as V2X, UE will similarly send SL PT-RS. Based on the measurement results of the received PT-RS, the peer UE can track the phase noise with high accuracy, so that high-speed high-frequency communication can also be realized on the PC5 interface.
  • the current 3GPP R16 protocol version only defines the resource mapping method of SL PT-RS, but its sequence generation method is not perfect, which will cause the sender UE and receiver UE on the PC5 interface to target
  • the problem of inconsistent generation of SL PT-RS sequences makes the UE at the receiving end unable to accurately receive SL PT-RS and perform phase tracking, which affects the quality of high-frequency communication.
  • SL PT-RS in the current 3GPP R16 protocol version reuses the design of UL PT-RS.
  • PUSCH physical uplink shared channel
  • DMRS sequence generation since PSSCH does not support intra-slot frequency hopping, SL PT-RS can follow the sequence generation method of UL PT-RS, that is, the sequence of SL PT-RS is generated according to the PSSCH DMRS sequence at the position of the first PUSCH DMRS symbol.
  • the protocol stipulates that the PSSCH DMRS and the PSCCH cannot be mapped to the same OFDM symbol. Therefore, the first PSSCH DMRS symbol is The corresponding symbol does not actually carry PSSCH DMRS. At this time, the transmitting-end UE and/or the receiving-end UE may still The corresponding symbols generate the SL PT-RS sequence, and the SL PT-RS sequence may also be generated according to the actually mapped first symbol carrying the PSSCH DMRS.
  • the UE at the transmitting end and/or the UE at the receiving end cannot clearly identify the first PSSCH DMRS symbol according to the The corresponding symbol is still the first symbol that carries PSSCH DMRS, namely Corresponding symbols generate SL PT-RS sequences, so that the UE at the transmitting end and the UE at the receiving end may use different SL PT-RS sequences, so that phase tracking cannot be accurately achieved, and the communication quality is degraded.
  • PSCCH and PSSCH use only one subchannel for transmission, and PSCCH uses all PRBs in the subchannel.
  • the first PSSCH DMRS symbol i.e. The corresponding symbol may be completely punctured by the PSCCH, that is, the first PSSCH DMRS symbol is occupied by the PSCCH.
  • the UE at the transmitting end and/or the UE at the receiving end may still generate the SL PT-RS sequence according to the first PSSCH DMRS symbol, or may generate the SL PT-RS sequence according to the first symbol carrying the PSSCH DMRS.
  • the PSSCH DMRS will be mapped as shown in FIG. 9 . It can be found that although the number of symbols corresponding to the time domain pattern of the PSSCH DMRS is 4, the first PSSCH DMRS symbol is occupied by the PSCCH.
  • the UE at the transmitting end and/or the UE at the receiving end cannot clearly identify the first PSSCH DMRS symbol according to the The corresponding symbol is still the first symbol that carries PSSCH DMRS, namely Corresponding symbols generate SL PT-RS sequences, so that the UE at the transmitting end and the UE at the receiving end may use different SL PT-RS sequences, so that phase tracking cannot be accurately achieved, and the communication quality is degraded.
  • the sequence of the SL PT-RS can also be generated according to the last PSSCH DMRS symbol.
  • the UE at the transmitting end and/or the UE at the receiving end may generate the SL PT-RS sequence according to the last PSSCH DMRS symbol, or may also generate the SL PT-RS sequence according to the last symbol carrying the PSSCH DMRS.
  • the PSSCH DMRS can be mapped as shown in FIG. 10 . It can be found that although the number of PSSCH DMRS symbols corresponding to the time domain pattern of the PSSCH DMRS is 4, the last PSSCH DMRS symbol is chiseled by the GAP symbol after the PSSCH during actual mapping.
  • the UE at the transmitting end and/or the UE at the receiving end cannot clearly identify the DMRS symbol according to the last PSSCH DMRS
  • the corresponding symbol is still the last symbol carrying the PSSCH DMRS, namely Corresponding symbols generate SL PT-RS sequences, so that the UE at the transmitting end and the UE at the receiving end may use different SL PT-RS sequences, so that phase tracking cannot be accurately achieved, and the communication quality is degraded.
  • embodiments of the present application provide a method and device for generating a reference signal sequence to solve the problem of inaccurate phase tracking in an SL communication scenario.
  • the method and the device are based on the same technical concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • At least one refers to one or more, and "a plurality” refers to two or more.
  • And/or which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one (item) of the following or its similar expression refers to any combination of these items, including any combination of single item (item) or plural item (item).
  • At least one (a) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the DMRS symbols described in the embodiments of the present application may also be referred to as PSSCH DMRS symbols, which can be understood as symbols that should carry PSSCH DMRS according to the protocol.
  • the SCI indicates that the number of symbols corresponding to the time domain pattern of the PSSCH DMRS is 4 in the first set, and the PSSCH DMRS symbols can be corresponding symbol.
  • the unit of the DMRS symbol can be "piece” or "column", for example, the first DMRS symbol can also be called “the first column of DMRS symbols", and the last DMRS symbol can also be called "the last column of DMRS symbols". symbol".
  • symbols carrying DMRS may also be referred to as "actually mapped DMRS symbols", for example, “the first symbol carrying DMRS” may also be described as “the first actually mapped DMRS symbol” or “First column of actual mapped DMRS symbols”.
  • the last symbol carrying DMRS may also be described as "the last actually mapped DMRS symbol” or "the last column of actually mapped DMRS symbols”.
  • the first DMRS symbol is The corresponding symbol
  • the first actual mapped DMRS symbol is corresponding symbol.
  • Figure 10 the last DMRS symbol is The corresponding symbol, the last actual mapped DMRS symbol is corresponding symbol.
  • a method for generating a reference signal sequence is provided in an embodiment of the present application.
  • the method can be applied to a terminal device, or a chip, or a chipset, or a functional module in the chip that executes the method, and so on.
  • the reference signal sequence generation method may specifically include:
  • the first terminal device generates a PT-RS sequence according to the DMRS sequence corresponding to the symbol position.
  • PT-RS may also be referred to as SL PT-RS
  • DMRS may also be referred to as PSSCH DMRS.
  • the first terminal device may also be referred to as a sending-side terminal
  • the second terminal device may also be referred to as a receiving-side terminal.
  • the symbol positions may be related to symbols used to transmit a 2 nd stage SCI.
  • the symbol position may be the position of the DMRS symbol corresponding to the first symbol of the second-level SCI.
  • the symbol position may also be the position of the first symbol of the second-level SCI.
  • the SCI is divided into two stages for transmission.
  • the first stage SCI (1st stage SCI) is carried in the PSCCH
  • the second stage SCI is carried in the PSSCH .
  • the protocol stipulates that the first symbol of the second-level SCI will correspond to an actual mapped PSSCH DMRS symbol. Therefore, associating the sequence generation process of the PT-RS with the first symbol of the second-level SCI can avoid the problem of confusion about the location of the DMRS.
  • the symbol position may also be related to a symbol in a slot that carries a DMRS.
  • the symbol position may be related to the first DMRS-carrying symbol in the slot.
  • the symbol position may be the position of the first DMRS-carrying symbol in the slot.
  • the symbol position may be the first symbol carrying the PSSCH DMRS in the time slot, that is, corresponding symbol.
  • the symbol position may also be the position of the first actually mapped DMRS symbol in the slot.
  • the symbol position may be the position of the first actually mapped DMRS symbol in the time slot, that is, corresponding symbol.
  • the symbol position may also be related to the last symbol carrying DMRS in the slot.
  • the symbol position may be the position of the last DMRS-carrying symbol in the slot.
  • the symbol position may be the last symbol carrying the PSSCH DMRS in the time slot, that is, corresponding symbol.
  • the symbol position may also be the position of the last actually mapped DMRS symbol in the slot.
  • the symbol position may be the position of the last actually mapped DMRS symbol in the time slot, that is, corresponding symbol.
  • the symbol position can be the position of the last DMRS symbol in the time slot. If the last DMRS symbol in the time slot is occupied by signals other than DMRS, the symbol The position may be the position of the penultimate DMRS symbol in the slot. Exemplarily, when the last DMRS symbol is removed by any one of the GAP symbol immediately after the PSSCH, or the AGC symbol immediately before the PSFCH, or the symbol occupied by the PSFCH, or the GAP symbol immediately after the PSFCH, the symbol position is: The position of the penultimate PSSCH DMRS symbol. Exemplarily, if the SL communication adopts the pattern shown in FIG. 8 or FIG. 9, the symbol position may be the last DMRS symbol in the time slot, that is, corresponding symbol. If the SL communication adopts the pattern shown in Figure 10, the symbol position can be the penultimate DMRS symbol in the time slot, namely corresponding symbol.
  • the symbol position may be related to the second symbol carrying DMRS, the third symbol carrying DMRS, etc. in the time slot, which will not be described one by one here.
  • the symbol position may also be a fixed symbol position in the time slot.
  • the symbol position may be the position of the first symbol in the time slot, and the offset value of the first symbol relative to the position of the first symbol of the sideline transmission resource is a preset value.
  • the symbol position can be or the position of the corresponding OFDM symbol, where, is the offset value relative to the first OFDM symbol of the SL transmission resource. It should be understood that The position of the corresponding OFDM symbol is the position of the first OFDM symbol of the SL transmission resource, The position of the corresponding OFDM symbol is the position of the second OFDM symbol of the SL transmission resource.
  • the DMRS sequence corresponding to the symbol position may be understood as the DMRS sequence carried by the symbol corresponding to the symbol position.
  • the DMRS sequence corresponding to the symbol position may also be understood as a DMRS sequence generated according to the symbol position.
  • the symbol corresponding to the symbol position may or may not carry the DMRS sequence. If the symbol corresponding to the symbol position carries the DMRS sequence, the PT-RS sequence may be determined according to the DMRS sequence carried by the symbol corresponding to the symbol position, or the DMRS sequence may be generated according to the symbol position, and then the PT-RS sequence may be determined according to the generated DMRS sequence. If the symbol corresponding to the symbol position does not carry the DMRS sequence, the DMRS sequence may be generated according to the symbol position, and then the PT-RS sequence may be determined according to the generated DMRS sequence.
  • transmission can also be understood as carrying, carrying, etc.
  • symbols used to transmit the second-level SCI can also be described as “symbols used to carry the second-level SCI” or “used for "Symbols carrying a second-level SCI” or “symbols carrying a second-level SCI” or “symbols carrying a second-level SCI”, etc.
  • carrier DMRS may also be described as “carrying DMRS” or “transmitting DMRS”, or the like.
  • the first terminal device sends a PT-RS sequence to the second terminal device.
  • the second terminal device receives the PT-RS sequence sent by the first terminal device.
  • the second terminal device generates a PT-RS sequence.
  • the manner in which the second terminal device generates the PT-RS sequence may be the same as the manner in which the first terminal device generates the PT-RS sequence.
  • step S1101 please refer to the relevant description of step S1101, which will not be repeated here.
  • step S1102 and step S1103 do not have a strict sequence, and step S1102 may be performed first and then step S1103 may be performed, or step S1103 may be performed first and then step S1102 may be performed, or step S1102 and step S1103 may be performed simultaneously.
  • the second terminal device performs phase tracking according to the PT-RS sequence generated by the second terminal device and the received PT-RS sequence.
  • the UE at the transmitting end and the UE at the receiving end can perform phase tracking based on the same PT-RS sequence, so that the accuracy of the phase tracking can be improved. Improve the quality of SL communication in high frequency bands.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment of the present application provides a DMRS time-domain pattern configuration method. As shown in Figure 12, the method may specifically include:
  • the network device determines a first set according to first configuration information, where the first configuration information is used to configure a period of the PSFCH.
  • the first set includes at least one candidate set, wherein the candidate set includes the number of symbols corresponding to at least one DMRS time-domain pattern.
  • the period of the PSFCH is non-zero, the number of symbols included in any candidate set included in the first set is greater than one.
  • the candidate sets of the number of symbols corresponding to the time domain pattern of DMRS are as follows: ⁇ 2 ⁇ , ⁇ 3 ⁇ , ⁇ 4 ⁇ , ⁇ 2,3 ⁇ , ⁇ 2,4 ⁇ , ⁇ 3,4 ⁇ , ⁇ 2,3,4 ⁇ is taken as an example to illustrate the first set.
  • the first set may include one or more of the following candidate sets: ⁇ 2 ⁇ , ⁇ 3 ⁇ , ⁇ 4 ⁇ , ⁇ 2,3 ⁇ , ⁇ 2 ,4 ⁇ , ⁇ 3,4 ⁇ , ⁇ 2,3,4 ⁇ .
  • the first set may include one or more of the following candidate sets: ⁇ 2,3 ⁇ , ⁇ 2,4 ⁇ , ⁇ 3,4 ⁇ , ⁇ 2,3,4 ⁇ .
  • the network device sends second configuration information to the first terminal device, where the second configuration information is used to determine a second set in the first set, and the second set includes the number of symbols corresponding to at least one DMRS time-domain pattern.
  • the first terminal device receives the first configuration information and the second configuration information.
  • the network device may also send the first configuration information to the first terminal device.
  • the first terminal device may determine the period of the PSFCH according to the first configuration information.
  • the first terminal device determines, according to the second configuration information, a DMRS time-domain pattern that can be used for SL transmission.
  • the first terminal device may determine a second set according to the second configuration information, and determine a DMRS time domain pattern that can be used for SL transmission according to the second set. For example, when the period of the PSFCH configured in the first configuration information is non-zero, if there is no PSFCH resource in the time slot, the first terminal device can use the DMRS time domain pattern corresponding to a certain number of symbols in the second set, and there is a PSFCH in the time slot. resource, the first terminal device may use the DMRS time-domain pattern corresponding to another symbol number in the second set.
  • the first terminal device can use the DMRS time domain pattern corresponding to 2 DMRS symbols (or the DMRS time domain pattern corresponding to 3 DMRS symbols) pattern, or the DMRS time domain pattern corresponding to 4 DMRS symbols), if the time slot has PSFCH resources, the first terminal device can use the DMRS time domain pattern corresponding to 2 DMRS symbols (or the DMRS time domain pattern corresponding to 3 DMRS symbols) ) to avoid chipping of the last DMRS symbol.
  • Embodiment 2 of the present application by restricting the configuration method of the DMRS time domain pattern on the resource pool by the network device, when the period for configuring the PSFCH by the network device is non-zero, multiple DMRS time domain patterns can be configured.
  • the UE at the transmitting end can use another DMRS time domain pattern to communicate with the UE at the receiving end, so that the last DMRS symbol can be prevented from being replaced by the GAP symbol immediately after the PSSCH, Either the AGC symbol immediately before the PSFCH, or the symbol occupied by the PSFCH, or any one of the GAP symbols immediately after the PSFCH is removed, so that the transmitting end UE and the receiving end UE generate a consistent SL PT-RS sequence, so that the receiving end
  • the UE can accurately receive the PT-RS sequence, thereby improving the accuracy of phase tracking and improving the quality of SL communication in high frequency bands.
  • the embodiment of the present application provides a communication device, and the structure of the communication device may be as shown in FIG. 13 , including a processing unit 1301 and a transceiver unit 1302 .
  • the communication apparatus may be specifically used to implement the method performed by the first terminal device in the embodiment as shown in FIG. 11 , and the apparatus may be the first terminal device itself, or a chip or a chip in the first terminal device.
  • the processing unit 1301 is used to generate a PT-RS sequence according to the DMRS sequence corresponding to the symbol position, and the symbol position is related to the symbol used to transmit the second-level SCI, or, the symbol position is related to a symbol carrying a DMRS in the time slot, Or, the symbol position is a fixed symbol position in the time slot;
  • the transceiver unit 1302 is configured to send the PT-RS sequence to the second terminal device.
  • the symbol position may be the position of the DMRS symbol corresponding to the first symbol of the second-level SCI; or, the symbol position may also be the position of the first symbol of the second-level SCI.
  • the symbol position may be the position of the last DMRS-carrying symbol in the slot; or, the symbol position may be the position of the last actually mapped DMRS symbol in the slot; or, if the last symbol in the slot One DMRS symbol is occupied by signals other than DMRS, and the symbol position may be the position of the penultimate column of DMRS symbols in the slot.
  • the symbol position may be the position of the first DMRS-carrying symbol in the time slot; or, the symbol position may be the position of the first actually mapped DMRS symbol in the time slot.
  • the symbol position may be the position of the first symbol in the time slot, and the offset value of the first symbol relative to the position of the first symbol of the sideline transmission resource is a preset value.
  • the DMRS sequence corresponding to the symbol position may be the DMRS sequence carried by the symbol corresponding to the symbol position;
  • the DMRS sequence corresponding to the symbol position may also be a DMRS sequence generated according to the symbol position.
  • the communication apparatus may be specifically used to implement the method performed by the second terminal device in the embodiment as shown in FIG. 11 , and the apparatus may be the second terminal device itself, or a chip or a chip in the second terminal device.
  • the processing unit 1301 is configured to generate the first PT-RS sequence according to the DMRS sequence corresponding to the symbol position, and the symbol position is related to the symbol used to transmit the second-level SCI, or the symbol position is related to a symbol carrying DMRS in the time slot. Correlation, or, the symbol position is a fixed symbol position in the time slot; the transceiver unit 1302 is configured to receive the second PT-RS sequence from the first terminal device.
  • the processing unit 1301 is further configured to perform phase tracking according to the first PT-RS sequence and the second PT-RS sequence.
  • the symbol position may be the position of the DMRS symbol corresponding to the first symbol of the second-level SCI; or, the symbol position may also be the position of the first symbol of the second-level SCI.
  • the symbol position may be the position of the last DMRS-carrying symbol in the slot; or, the symbol position may be the position of the last actually mapped DMRS symbol in the slot; or, if the last symbol in the slot One DMRS symbol is occupied by signals other than DMRS, and the symbol position may be the position of the penultimate column of DMRS symbols in the slot.
  • the symbol position may be the position of the first DMRS-carrying symbol in the time slot; or, the symbol position may be the position of the first actually mapped DMRS symbol in the time slot.
  • the symbol position may be the position of the first symbol in the time slot, and the offset value of the first symbol relative to the position of the first symbol of the sideline transmission resource is a preset value.
  • the DMRS sequence corresponding to the symbol position may be the DMRS sequence carried by the symbol corresponding to the symbol position;
  • the DMRS sequence corresponding to the symbol position may also be a DMRS sequence generated according to the symbol position.
  • the division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It can be understood that, for the functions or implementations of each module in the embodiments of the present application, further reference may be made to the related descriptions of the method embodiments.
  • the communication device may be as shown in FIG. 14 , and the communication device may be a communication device or a chip in the communication device, where the communication device may be a terminal device or a network device.
  • the apparatus may include a processor 1401 , a communication interface 1402 , and a memory 1403 .
  • the processing unit 1301 in FIG. 13 may be the processor 1401 here, and the transceiver unit 1302 in FIG. 13 may be the communication interface 1402 here.
  • the processor 1401 may be a central processing unit (central processing unit, CPU), or a digital processing module or the like.
  • the communication interface 1402 may be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip or the like.
  • the apparatus further includes: a memory 1403 for storing programs executed by the processor 1401 .
  • the memory 1403 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as random access memory (random access memory) -access memory, RAM).
  • Memory 1403 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the processor 1401 is used to execute the program code stored in the memory 1403, and is specifically used to execute the actions of the above-mentioned processing unit 1301, which will not be repeated in this application.
  • the communication interface 1402 is specifically configured to perform the actions of the above-mentioned transceiver unit 1302, and details are not described herein again in this application.
  • the specific connection medium between the communication interface 1402 , the processor 1401 , and the memory 1403 is not limited in the embodiments of the present application.
  • the memory 1403, the processor 1401, and the communication interface 1402 are connected through a bus 1404 in FIG. 14.
  • the bus is represented by a thick line in FIG. 14, and the connection between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in FIG. 14, but it does not mean that there is only one bus or one type of bus.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请公开了一种参考信号序列生成方法及装置，用以解决侧行链路通信场景中相位跟踪不准确的问题。该方法包括：第一终端设备根据符号位置对应的解调参考信号序列生成相位跟踪参考信号序列，并向第二终端设备发送相位跟踪参考信号序列。符号位置与用于传输第二级侧行控制信息的符号相关，或者，符号位置与时隙中一个携带解调参考信号的符号相关，或者，符号位置为时隙中一个固定的符号位置。

Description

一种参考信号序列生成方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种参考信号序列生成方法及装置。
背景技术
高频通信中，其频谱特性导致信号传输过程中将存在相位噪声(phase noise)，该相位噪声在时域上的变化较快，而在频域上的变化较为平缓。为了缓解相位噪声对高频通信产生的影响，在用户设备(user equipment，UE)与基站间通信的Uu接口上，基站将向UE发送下行链路(downlink，DL)相位跟踪参考信号(phase tracking reference signal，PT-RS)，UE基于接收到的PT-RS的测量结果进行上行传输。UE将向基站发送上行链路(uplink，UL)PT-RS，基站基于接收到的PT-RS的测量结果进行下行传输，从而可以实现高速率的高频段通信。
在侧行链路(sidelink，SL)通信场景，UE可以发送SL PT-RS，接收侧UE基于对接收到的PT-RS的测量结果，可以较高精度地追踪相位噪声，从而SL通信场景中也可以实现高速率的高频段通信。但是，当前3GPP R16协议版本仅定义了SL PT-RS的资源映射方法，但其序列生成方法并不完善，这将造成发送端UE与接收端UE针对SL PT-RS序列的生成不一致的问题，使得接收端UE无法准确地接收SL PT-RS并进行相位跟踪，对高频通信质量产生巨大影响。
发明内容
本申请提供一种参考信号序列生成方法及装置，用以解决SL通信场景中相位跟踪不准确的问题。
第一方面，本申请提供了一种参考信号序列生成方法，所述方法可以应用于终端设备，或者芯片，或者芯片组，或者芯片中执行该方法的功能模块等等。以终端设备为例，该方法包括：第一终端设备根据符号位置对应的解调参考信号(demodulation reference signal，DMRS)序列生成PT-RS序列，并向第二终端设备发送PT-RS序列。符号位置与用于传输第二级侧行控制信息(sidelink control information，SCI)的符号相关，或者，符号位置与时隙中一个携带DMRS的符号相关，或者，符号位置为时隙中一个固定的符号位置。
本申请实施例通过明确生成PT-RS时所使用的符号位置，可以使得发送端UE和接收端UE可以基于相同的PT-RS序列进行相位追踪，从而可以提高相位跟踪的准确性，进而可以提升高频段下的SL通信质量。
在一种可能的设计中，符号位置可以为第二级SCI的第一个符号对应的DMRS符号的位置。或者，符号位置也可以为第二级SCI的第一个符号的位置。上述设计中，将PT-RS的序列生成过程与第二级SCI的第一个符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中最后一个携带DMRS的符号的位置；或者，符号位置也可以为时隙中最后一个实际映射的DMRS符号的位置；或者，若时隙中最后一个DMRS符号被DMRS以外的其他信号占用，符号位置还可以为时隙中倒数第二列DMRS符号的位置。上述设计中，将PT-RS的序列生成过程与实际携带DMRS的符号关 联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中第一个携带DMRS的符号的位置；或者，符号位置也可以为时隙中第一个实际映射的DMRS符号的位置。上述设计中，将PT-RS的序列生成过程与实际携带DMRS的符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中第一符号的位置，第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。上述设计中，将PT-RS的序列生成过程与固定位置的符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置对应的DMRS序列可以为符号位置对应符号所携带的DMRS序列。上述设计中，根据符号位置对应符号所携带的DMRS序列确定PT-RS的序列，可以降低计算开销。
在一种可能的设计中，符号位置对应的DMRS序列也可以为根据符号位置生成的DMRS序列。上述设计中，根据符号位置生成PT-RS的序列，可以提高PT-RS的序列的准确性。
第二方面，本申请提供了一种DMRS时域图样配置方法，所述方法可以应用于网络设备，或者芯片，或者芯片组，或者芯片中执行该方法的功能模块等等。以网络设备为例，该方法包括：网络设备根据第一配置信息确定第一集合，该第一配置信息用于配置PSFCH的周期。第一集合包括至少一个候选集合，其中，候选集合包括至少一个DMRS时域图样对应的符号数。当PSFCH的周期为非零时，第一集合包括的任一候选集合所包括的符号数的数量大于1。网络设备向第一终端设备发送第一配置信息和第二配置信息，第二配置信息用于在第一集合中确定第二集合，第二集合包括至少一个DMRS时域图样分别对应的符号数。
本申请实施例中通过限制网络设备对于资源池上DMRS时域图样的配置方法，当网络设备配置PSFCH的周期非零时，可以配置多个DMRS时域图样。如此，当SL通信中某一个时隙存在PSFCH资源时，发送端UE可以使用另一个DMRS时域图样与接收端UE之间进行通信，从而可以避免最后一个DMRS符号被PSSCH后紧邻的GAP符号，或者PSFCH前紧邻的AGC符号，或者PSFCH占用的符号，或者PSFCH后紧邻的GAP符号中的任意一个凿去的情况，使得发送端UE和接收端UE生成一致的SL PT-RS序列，从而接收端UE可以准确接收PT-RS序列，进而可以提高相位跟踪的准确性，可以提升高频段下的SL通信质量。
第三方面，本申请提供了一种DMRS时域图样配置方法，所述方法可以应用于终端设备，或者芯片，或者芯片组，或者芯片中执行该方法的功能模块等等。以终端设备为例，该方法包括：第一终端设备接收第一配置信息和第二配置信息。该第一配置信息用于配置PSFCH的周期。第一集合包括至少一个候选集合，其中，候选集合包括至少一个DMRS时域图样对应的符号数。当PSFCH的周期为非零时，第一集合包括的任一候选集合所包括的符号数的数量大于1。第二配置信息用于在第一集合中确定第二集合，第二集合包括至少一个DMRS时域图样对应的符号数。第一终端设备根据第一配置信息确定第一集合，并根据第二配置信息在第一集合中确定第二集合，并根据第二集合确定SL传输可以使用的DMRS时域图样。
本申请实施例中通过限制网络设备对于资源池上DMRS时域图样的配置方法，当网络设备配置PSFCH的周期非零时，可以配置多个DMRS时域图样。如此，当SL通信中某 一个时隙存在PSFCH资源时，发送端UE可以使用另一个DMRS时域图样与接收端UE之间进行通信，从而可以避免最后一个DMRS符号被PSSCH后紧邻的GAP符号，或者PSFCH前紧邻的AGC符号，或者PSFCH占用的符号，或者PSFCH后紧邻的GAP符号中的任意一个凿去的情况，使得发送端UE和接收端UE可以生成一致的SL PT-RS序列，从而接收端UE可以准确接收PT-RS序列，进而可以提高相位跟踪的准确性，提升高频段下的SL通信质量。
在一种可能的设计中，当第一配置信息配置PSFCH的周期为非零时，若时隙不存在PSFCH资源，第一终端设备可以使用第一集合中的某一个符号数对应的DMRS时域图样，当时隙存在PSFCH资源，第一终端设备可以使用第一集合中的另一个符号数对应的DMRS时域图样。上述设计中，当SL通信中某一个时隙存在PSFCH资源时，发送端UE可以使用另一个DMRS时域图样与接收端UE之间进行通信，从而可以避免最后一个DMRS符号被PSSCH后紧邻的GAP符号，或者PSFCH前紧邻的AGC符号，或者PSFCH占用的符号，或者PSFCH后紧邻的GAP符号中的任意一个凿去的情况。
第四方面，本申请提供了一种参考信号序列生成方法，所述方法可以应用于终端设备，或者芯片，或者芯片组，或者芯片中执行该方法的功能模块等等。以终端设备为例，该方法包括：第二终端设备根据符号位置对应的解调参考信号DMRS序列生成第一相位跟踪参考信号PT-RS序列，所述符号位置与用于传输第二级侧行链路控制信息SCI的符号相关，或者，所述符号位置与时隙中一个携带DMRS的符号相关，或者，所述符号位置为时隙中一个固定的符号位置；第二终端设备接收来自第一终端设备的第二PT-RS序列；第二终端设备根据所述第一PT-RS序列和所述第二PT-RS序列进行相位追踪。
本申请实施例通过明确生成PT-RS时所使用的符号位置，可以使得发送端UE和接收端UE可以基于相同的PT-RS序列进行相位追踪，从而可以提高相位跟踪的准确性，进而可以提升高频段下的SL通信质量。
在一种可能的设计中，符号位置可以为第二级SCI的第一个符号对应的DMRS符号的位置。或者，符号位置也可以为第二级SCI的第一个符号的位置。上述设计中，将PT-RS的序列生成过程与第二级SCI的第一个符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中最后一个携带DMRS的符号的位置；或者，符号位置也可以为时隙中最后一个实际映射的DMRS符号的位置；或者，若时隙中最后一个DMRS符号被DMRS以外的其他信号占用，符号位置还可以为时隙中倒数第二列DMRS符号的位置。上述设计中，将PT-RS的序列生成过程与实际携带DMRS的符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中第一个携带DMRS的符号的位置；或者，符号位置也可以为时隙中第一个实际映射的DMRS符号的位置。上述设计中，将PT-RS的序列生成过程与实际携带DMRS的符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置可以为时隙中第一符号的位置，第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。上述设计中，将PT-RS的序列生成过程与固定位置的符号关联，可以避免DMRS的位置存在混淆的问题。
在一种可能的设计中，符号位置对应的DMRS序列可以为符号位置对应符号所携带的DMRS序列。上述设计中，根据符号位置对应符号所携带的DMRS序列确定PT-RS的序列，可以降低计算开销。
在一种可能的设计中，符号位置对应的DMRS序列也可以为根据符号位置生成的DMRS序列。上述设计中，根据符号位置生成PT-RS的序列，可以提高PT-RS的序列的准确性。
第五方面，本申请实施例提供一种通信装置，该装置可以是终端设备，也可以是终端设备内的芯片或模块。该装置可以包括处理单元、收发单元和接收单元。应理解的是，这里发送单元和接收单元还可以为合并称为收发单元。当该装置是终端设备时，该处理单元可以是处理器，该发送单元和接收单元可以是收发器；该通信设备还可以包括存储单元，该存储单元可以是存储器；该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使终端设备执行第一方面或第一方面任意一种可能的设计中的方法，或者，以使终端设备执行第三方面或第三方面任意一种可能的设计中的方法，或者，以使终端设备执行第四方面或第四方面任意一种可能的设计中的方法。当该装置是终端设备内的芯片时，该处理单元可以是处理器，该发送单元和接收单元可以是输入/输出接口、管脚或电路等；该处理单元执行存储单元所存储的指令，以使该芯片执行第一方面或第一方面任意一种可能的设计中的方法，或者，以使该芯片执行第三方面或第三方面任意一种可能的设计中的方法，或者，以使该芯片执行第四方面或第四方面任意一种可能的设计中的方法。该存储单元用于存储指令，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该终端设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
第六方面，本申请实施例提供一种通信装置，该装置可以是网络设备，也可以是网络设备内的芯片或模块。该装置可以包括处理单元、收发单元和接收单元。应理解的是，这里发送单元和接收单元还可以为合并称为收发单元。当该装置是网络设备时，该处理单元可以是处理器，该发送单元和接收单元可以是收发器；该通信设备还可以包括存储单元，该存储单元可以是存储器；该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使网络设备执行第二方面或第二方面任意一种可能的设计中的方法。当该装置是网络设备内的芯片时，该处理单元可以是处理器，该发送单元和接收单元可以是输入/输出接口、管脚或电路等；该处理单元执行存储单元所存储的指令，以使该芯片执行第二方面或第二方面任意一种可能的设计中的方法。该存储单元用于存储指令，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该终端设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
第七方面，本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序在计算机上运行时，使得计算机执行上述第一方面至第四方面中任一方面所述的方法。
第八方面，本申请实施例还提供一种包含计算机程序的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面至第四方面中任一方面所述的方法。
第九方面，提供了一种通信装置，包括：处理器、通信接口和存储器。通信接口用于该装置与其他装置之间传输信息、和/或消息、和/或数据。该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第一方面及其任一可能的设计所述的方法或者如上述第三方面及其任一可能的设计所述的方法或者如上述第四方面及其任一可能的设计所述的方法。
第十方面，提供了一种通信装置，包括：处理器、通信接口和存储器。通信接口用于 该装置与其他装置之间传输信息、和/或消息、和/或数据。该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第二方面及其任一可能的设计所述的方法。
第十一方面，本申请实施例提供的一种芯片，所述芯片与存储器耦合，执行上述第一方面及其任一可能的设计所述的方法或者第三方面及其任一可能的设计所述的方法或者如上述第四方面及其任一可能的设计所述的方法。
第十二方面，本申请实施例提供的一种芯片，所述芯片与存储器耦合，执行上述第二方面及其任一可能的设计所述的方法。
需要说明的是，本申请实施例中“耦合”是指两个部件彼此直接或间接地结合。
第十三方面，本申请实施例提供一种芯片，包括通信接口和至少一个处理器，所述处理器通过通信接口获取计算机程序指令并运行以执行上述第一方面及其任一可能的设计所述的方法或者第三方面及其任一可能的设计所述的方法或者如上述第四方面及其任一可能的设计所述的方法。
第十四方面，本申请实施例提供一种芯片，包括通信接口和至少一个处理器，所述处理器通过通信接口获取计算机程序指令并运行以执行上述第二方面及其任一可能的设计所述的方法。
上述第五方面至第十四方面中任一方面中的任一可能设计可以达到的技术效果，请参照上述第一方面至第四方面中任一方面中的任一可能的设计可以达到的技术效果描述，这里不再重复赘述。
附图说明
图1为本申请实施例提供的一种PSCCH与PSSCH的复用结构示意图；
图2为本申请实施例提供的一种PSSCH DMRS的时域图样的示意图；
图3为本申请实施例提供的一种PSCCH、PSSCH与PSFCH的复用结构示意图；
图4为本申请实施例提供的一种通信场景的示意图；
图5为本申请实施例提供的一种发送端UE的结构示意图；
图6为本申请实施例提供的一种接收端UE的结构示意图；
图7为本申请实施例提供的一种网络设备的结构示意图；
图8为本申请实施例提供的一种PSSCH DMRS的时域图样的示意图PSSCH DMRS的时域图样的示意图；
图9为本申请实施例提供的另一种PSSCH DMRS的时域图样的示意图；
图10为本申请实施例提供的再一种PSSCH DMRS的时域图样的示意图；
图11为本申请实施例提供的一种参考信号序列生成方法的流程示意图；
图12为本申请实施例提供的一种DMRS时域图样配置方法的流程示意图；
图13为本申请实施例提供的一种通信装置的结构示意图；
图14为本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1、物理侧行控制信道(physical sidelink control channel，PSCCH)：用于传输侧行链路(sidelink，SL)的物理层控制信息的信道。
2、物理侧行共享信道(physical sidelink shared channel，PSSCH)：用于传输SL的物理层数据和/或参考信号的信道。
3、物理侧行反馈信道(physical sidelink feedback channel，PSFCH)：用于传输SL的混合自动重传请求(hybrid automatic repeat request，HARQ)反馈信息的信道。
4、PSSCH解调参考信号(demodulation reference signal，DMRS)：用于解调SL的物理层数据的参考信号。
5、Uu接口(Uu interface)：用户设备与基站之间的通信接口。
6、PC5接口(PC5interface)：用户设备与用户设备之间的通信接口。
7、资源池(resouce pool)：时频资源的集合。具体形式为时域上的多个正交频分复用符号以及频域上多个连续的物理资源块对应的集合。SL通信的资源池，指SL传输可以使用的时频资源的集合。
8、子信道(sub-channel)：频域上多个物理资源块(physical resource block，PRB)的集合。
9、PSCCH与PSSCH在时隙内的复用结构，用于单次PSCCH与PSSCH传输的SL传输资源，在频域上占用资源池中的一个或多个子信道，在时域上占用资源池中的一个时隙(slot)。资源池的配置信息包含PSCCH的配置信息，PSCCH的配置信息进一步包括时域上的正交频分复用(orthogonal frequency-division multiplexing，OFDM)符号数目以及频域上的PRB数目。基于PSCCH的配置信息，PSCCH的时域起始位置为SL传输资源中除自动增益控制(automatic gain control，AGC)符号外的第一个OFDM符号；PSCCH的频域起始位置为SL传输资源的第一个PRB。具体地，单次PSCCH与PSSCH传输中PSCCH与PSSCH的复用结构示意图可以如图1所示。
图1中，AGC符号用于接收端进行硬件上的增益调整，将占用SL传输资源中的第一个OFDM符号。GAP(即gap)符号用于实现UE端的收发转换，将占用SL传输资源中的最后一个OFDM符号。在图1所示的复用结构中，PSCCH的时域起始位置与PSSCH的时域起始位置相同，在PSCCH占用的多个OFDM符号上，PSCCH与PSSCH是频分复用(frequency division multiplexing，FDM)的。在图1所示的复用结构中，PSCCH的频域起始位置与PSCCH的频域起始位置相同，在PSCCH占用的多个PRB上，PSCCH与PSSCH是时分复用(time division multiplexing，TDM)的。
10、PSSCH DMRS的时域图样，为了正确解调SL数据，需要使用PSSCH DMRS。PSSCH DMRS的时域图样(pattern)通过以下步骤进行指示：
S1，网络设备发送资源池的配置信息，资源池的配置信息中包含第一集合，该第一集合为PSSCH DMRS的时域图样对应的符号数的集合。第一集合可以配置为多个预配置的集合中的一个，例如，第一集合可以配置为以下集合中的一个：{2}，{3}，{4}，{2,3}，{2,4}，{3,4}，{2,3,4}。
S2，发送端UE向接收端UE发送侧行控制信息(sidelink control information，SCI)，该SCI包括PSSCH DMRS的时域图样的指示信息，该PSSCH DMRS的时域图样的指示信息用于指示第一集合中的一个PSSCH DMRS的时域图样对应的符号数目。例如，第一集合配置为{2,3,4}，该PSSCH DMRS的时域图样的指示信息可以指示第一集合中的一个 PSSCH DMRS的时域图样对应的符号数目为3。
S3，发送端UE和/或接收端UE可以通过表1确定PSSCH DMRS符号的时域位置，也即确定PSSCH DMRS的时域图样。
表1
Figure PCTCN2020107561-appb-000001
其中，l d表示PSSCH和关联的PSCCH以及AGC符号对应的OFDM符号总长度，
Figure PCTCN2020107561-appb-000002
表示PSSCH DMRS的时域位置，
Figure PCTCN2020107561-appb-000003
的取值范围为{0,1,…,l d-1}。
示例性的，l d＝13，第一集合为{2,3,4}，SCI指示PSSCH DMRS的时域图样对应的符号数目为第一集合中的4，则PSSCH DMRS的时域图样可以如图2所示。
11、PSCCH、PSSCH与PSFCH在时隙内的复用结构，PSFCH用于传输SL HARQ反馈信息。资源池的配置信息还可以包含PSFCH的配置信息，PSFCH的配置信息进一步可以包括PSFCH的周期。PSFCH的周期以资源池中的时隙为单位，配置为多个预设值中的一个，例如，可以配置为以下数值中的一个：0，1，2，4。数值为0表示资源池中不存在PSFCH资源，数值为k＝1或2或4表示资源池的每k个时隙中有一个PSFCH资源。
当PSFCH的周期非零时，如果时隙中不存在PSFCH资源，则PSCCH与PSSCH的复用结构可以如图1所示。如果时隙中存在PSFCH资源，则时隙中PSCCH、PSSCH与PSFCH的复用结构示意图可以如图3如所示。
其中，PSFCH占用一个OFDM符号，PSFCH之前需要专用的AGC符号，PSFCH之后需要专用的GAP符号。因此，当时隙中存在PSFCH资源时，时隙中将有三个OFDM符号被额外占用，这三个OFDM符号是时隙中的最后三个OFDM符号。
本申请提供的方法可以应用于5G新无线(new radio，NR)非授权(Unlicensed)系统，或者，也可以应用于其他通信系统中，例如，可以是物联网(internet of things，IoT)系统、车联网(vehicle-to-everything,V2X)系统，窄带物联网(narrow band internet of things，NB-IoT)系统、长期演进(long term evolution，LTE)系统，也可以是第五代(5G)通信系统，还可以是LTE与5G混合架构、也可以是5G新无线(new radio，NR)系统，以及未来通信发展中出现的新的通信系统等。
本申请实施例应用的场景可以为SL场景，包括V2X场景、设备到设备通信(device to device，D2D)通信场景等。图4以车到车通信(Vehicle to Vehicle，V2V)场景为例，示出一种场景示意图。场景中可以包括发送端UE和接收端UE，可以分别描述为第一终端设备和第二终端设备，图4中发送端UE和接收端UE均以车辆UE为例，实际应用场景中的发送端UE和接收端UE可以是任意形态的终端设备，或者为承载在车辆中的任意形态的终端设备。
本申请实施例中涉及的终端，是用户侧的一种用于接收或发射信号的实体。终端可以是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。终端也可以是连接到无线调制解调器的其他处理设备。终端可以通过无线接入网(radio access network，RAN)与一个或多个核心网进行通信。终端也可以称为无线终端、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、用户设备(user device)、或用户设备(user equipment，UE)等等。终端设备可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，终端设备还可以是个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。常见的终端设备例如包括：手机、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，例如智能手表、智能手环、计步器、智能家电，例如智能冰箱、智能洗衣机等，但本申请实施例不限于此。
在SL场景中，终端设备可以分为发送侧UE和接收侧UE。其中，发送端UE为SL场景中的信号发送实体，发送的信号可以包括数据信号和参考信号(例如SL相位跟踪参考信号(phase tracking reference signal，SL PT-RS))等。发送端UE可以包括处理模块和通信模块，如图5所示。处理模块可以用于处理通信过程中涉及到的算法、软件、程序、存储等。通信模块可以包括发送模块和接收模块，发送模块用于发送无线信号，接收模块用于接收无线信号。
接收端UE为SL场景中的信号接收实体，接收的信号可以包括数据信号和参考信号(例如SL PT-RS)等。接收端UE可以根据接收的SL PT-RS进行相位跟踪，提升高频段时的通信质量。接收端UE可以包括处理模块和通信模块，如图6所示。处理模块可以用于处理通信过程中涉及到的算法、软件、程序、存储等。通信模块可以包括发送模块和接收模块，发送模块用于发送无线信号，接收模块用于接收无线信号。
本申请实施例中所涉及的网络设备，是网络侧的一种用于发射或接收信号的实体，可以用于将收到的空中帧与网络协议(internet protocol，IP)分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可以包括IP网络等。网络设备还可以协调对空中接口的属性管理。例如，网络设备可以是LTE中的演进型基站(evolutional Node B，eNB或e-NodeB)，还可以是新无线控制器(new radio controller，NR controller)，可以是5G系统中的gNode B(gNB)，可以是集中式网元(centralized unit)，可以是新无线基站，可以是射频拉远模块，可以是微基站，可以是中继(relay)，可以是 分布式网元(distributed unit)，可以是接收点(transmission reception point，TRP)或传输点(transmission point，TP)或者任何其它无线接入设备，但本申请实施例不限于此。网络设备可以覆盖1个或多个小区。
在SL场景中，网络设备可以是SL通信的配置实体。网络设备将通过无线资源控制(radio resource control，RRC)信令配置SL通信的资源池。资源池中的配置信息将影响发送端UE与接收端UE进行SL通信时的发送和/或接收参数。网络设备可以包括处理模块和通信模块，如图7所示。处理模块可以用于处理通信过程中涉及到的算法、软件、程序、存储等。通信模块可以包括发送模块和接收模块，发送模块用于发送无线信号，接收模块用于接收无线信号。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
无线通信系统经历了从第一代模拟通信到5G NR的技术演变，所使用的无线频段正逐步从单独使用6GHz附近的低频段向同时使用低频段与20GHz以上的高频段演进。在3GPP协议中，低频段与高频段分别被定义为频率范围1(frequency range 1，FR1)和频率范围2(frequency range 2，FR2)，其代表的频率范围可以如表2所示。
表2
频率范围标识 频率范围
FR1 410MHz–7125MHz
FR2 24250MHz–52600MHz
在FR2对应的高频段通信中，其频谱特性导致信号传输过程中将存在相位噪声(Phase noise)，该相位噪声在时域上的变化较快，而在频域上的变化较为平缓。为了缓解相位噪声对FR2通信产生的影响，在UE与基站间通信的Uu接口上，基站将向UE发送下行链路(downlink，DL)PT-RS，而UE将向基站发送上行链路(uplink，UL)PT-RS。基于接收到的PT-RS的测量结果，Uu接口上可以实现高速率的高频段通信。
在UE与UE间通信的PC5接口上，如V2X等SL场景，UE将类似地发送SL PT-RS。对端UE基于接收到的PT-RS的测量结果，可以较高精度地追踪相位噪声，从而PC5接口上也可以实现高速率的高频段通信。然而，当前3GPP R16协议版本仅定义了SL PT-RS的资源映射(resource mapping)方法，但其序列生成(sequence generation)方法并不完善，这将造成PC5接口上发送端UE与接收端UE针对SL PT-RS序列的生成不一致的问题，使得接收端UE无法准确地接收SL PT-RS并进行相位跟踪，对高频段通信质量产生影响。
当前3GPP R16协议版本中SL PT-RS的设计复用了UL PT-RS的设计。对于UL PT-RS，当物理上行共享信道(physical uplink shared channel，PUSCH)不使用时隙内(intra-slot)跳频(frequency hopping)时，其序列根据第一个PUSCH DMRS符号的位置的PUSCH DMRS序列生成。由于PSSCH不支持时隙内跳频，因此SL PT-RS可以沿用UL PT-RS的序列生成方法，即SL PT-RS的序列根据第一个PUSCH DMRS符号的位置的PSSCH DMRS序列生成。
但是，在子信道对应的PRB数小于20时，协议规定PSSCH DMRS与PSCCH不可以 映射到同一个OFDM符号。因此，第一个PSSCH DMRS符号即
Figure PCTCN2020107561-appb-000004
对应的符号实际并没有携带PSSCH DMRS。此时，发送端UE和/或接收端UE可能仍根据
Figure PCTCN2020107561-appb-000005
对应的符号生成SL PT-RS序列，也可能根据实际映射的第一个携带PSSCH DMRS的符号生成SL PT-RS序列。
示例性的，假设l d＝13，第一集合为{4}，此时由于仅存在一种PSSCH DMRS的时域图样{1,4,7,10}，SCI对应的指示信息将变为0比特。假设子信道对应的PRB数为15，则PSSCH DMRS将如图8所示进行映射。可以发现，虽然PSSCH DMRS的时域图样对应的符号数为4，但是实际映射时第一个PSSCH DMRS符号实际上并没有携带PSSCH DMRS。因此，发送端UE和/或接收端UE无法明确根据第一个PSSCH DMRS符号即
Figure PCTCN2020107561-appb-000006
对应的符号还是第一个携带PSSCH DMRS的符号即
Figure PCTCN2020107561-appb-000007
对应的符号生成SL PT-RS序列，使得发送端UE和接收端UE可能使用不同的SL PT-RS序列，进而无法准确地实现相位跟踪，使得通信质量下降。
或者，PSCCH和PSSCH仅使用一个子信道进行传输时，且PSCCH使用子信道中的所有PRB。在此情况下，对于第一个PSSCH DMRS符号即
Figure PCTCN2020107561-appb-000008
对应的符号，可能会被PSCCH完全凿去(puncture)，即第一个PSSCH DMRS符号被PSCCH占用。此时，发送端UE和/或接收端UE可能仍根据第一个PSSCH DMRS符号生成SL PT-RS序列，也可能根据第一个携带PSSCH DMRS的符号生成SL PT-RS序列。
示例性的，假设l d＝13，第一集合为{4}，此时由于仅存在一种PSSCH DMRS的时域图样{1,4,7,10}，SCI对应的指示信息将变为0比特。假设子信道对应的PRB数为25，则PSSCH DMRS将如图9所示进行映射。可以发现，虽然PSSCH DMRS的时域图样对应的符号数为4，但是第一个PSSCH DMRS符号被PSCCH占用。此时，发送端UE和/或接收端UE无法明确根据第一个PSSCH DMRS符号即
Figure PCTCN2020107561-appb-000009
对应的符号还是第一个携带PSSCH DMRS的符号即
Figure PCTCN2020107561-appb-000010
对应的符号生成SL PT-RS序列，使得发送端UE和接收端UE可能使用不同的SL PT-RS序列，进而无法准确地实现相位跟踪，使得通信质量下降。
另一种可能的实现方式中，SL PT-RS的序列也可以根据最后一个PSSCH DMRS符号生成。
但是，PSFCH的周期非零时，在此情况下，对于最后一个PSSCH DMRS符号为SL传输资源中最后四个OFDM符号之一时，PSSCH后的GAP符号，或PSFCH占用的符号，或PSFCH前的GAP符号或PSFCH后的GAP符号可能会完全凿去最后一个PSSCH DMRS符号。此时，发送端UE和/或接收端UE可能根据最后一个PSSCH DMRS符号生成SL PT-RS序列，也可能根据最后一个携带PSSCH DMRS的符号生成SL PT-RS序列。
示例性的，假设l d＝13，第一集合为{4}，此时由于仅存在一种PSSCH DMRS的时域图样{1,4,7,10}，SCI对应的指示信息将变为0比特。假设子信道对应的PRB数为25，则PSSCH DMRS可以如图10所示进行映射。可以发现，虽然PSSCH DMRS的时域图样对应的PSSCH DMRS符号数为4，但是实际映射时最后一个PSSCH DMRS符号被PSSCH后的GAP符号凿去。此时，发送端UE和/或接收端UE无法明确根据最后一个PSSCH DMRS符号即
Figure PCTCN2020107561-appb-000011
对应的符号还是最后一个携带PSSCH DMRS的符号即
Figure PCTCN2020107561-appb-000012
对应的符号生成SL PT-RS序列，使得发送端UE和接收端UE可能使用不同的SL PT-RS序列，进而无法准确地实现相位跟踪，使得通信质量下降。
基于此，本申请实施例提供一种参考信号序列生成方法及装置，用以解决SL通信场 景中相位跟踪不准确的问题。其中，方法和装置是基于同一技术构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
应理解，本申请实施例中“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一(项)个”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a、b和c，其中a、b、c可以是单个，也可以是多个。
需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
本申请实施例所述的DMRS符号，也可以称为PSSCH DMRS符号，可以理解为根据协议应该携带PSSCH DMRS的符号，例如，假设l d＝13，第一集合为{2,3,4}，SCI指示PSSCH DMRS的时域图样对应的符号数目为第一集合中的4，PSSCH DMRS符号可以为
Figure PCTCN2020107561-appb-000013
对应的符号。DMRS符号的单位可以是“个”，也可以为“列”，例如，第一个DMRS符号，也可以称为“第一列DMRS符号”，最后一个DMRS符号，也可以称为“最后一列DMRS符号”。
本申请实施例中，“携带DMRS的符号”也可以称为“实际映射的DMRS符号”，例如，“第一个携带DMRS的符号”也可以描述为“第一个实际映射的DMRS符号”或者“第一列实际映射的DMRS符号”。又例如，“最后一个携带DMRS的符号”也可以描述为“最后一个实际映射的DMRS符号”或者“最后一列实际映射的DMRS符号”。示例性的，以图8为例，第一个DMRS符号为
Figure PCTCN2020107561-appb-000014
对应的符号，第一个实际映射的DMRS符号为
Figure PCTCN2020107561-appb-000015
对应的符号。示例性的，以图10为例，最后一个DMRS符号为
Figure PCTCN2020107561-appb-000016
对应的符号，最后一个实际映射的DMRS符号为
Figure PCTCN2020107561-appb-000017
对应的符号。
下面将结合附图，对本申请实施例进行详细描述。
实施例一：
如图11所示，为本申请实施例提供的一种参考信号序列生成方法。所述方法可以应用于终端设备，或者芯片，或者芯片组，或者芯片中执行该方法的功能模块等等。以终端设备为例，参考信号序列生成方法具体可以包括：
S1101，第一终端设备根据符号位置对应的DMRS序列生成PT-RS序列。本申请实施例中PT-RS也可以称为SL PT-RS，DMRS也可以称为PSSCH DMRS。
示例性的，第一终端设备也可以称为发送侧终端，第二终端设备也可以称为接收侧终端。
一种示例性说明中，符号位置可以与用于传输第二级SCI(2 nd stage SCI)的符号相关。例如，符号位置可以为第二级SCI的第一个符号对应的DMRS符号的位置。或者，符号位置也可以为第二级SCI的第一个符号的位置。
SCI分为两级进行传输，第一级SCI(1 st stage SCI)承载于PSCCH中，第二级SCI承载于PSSCH中。为了提升第二级SCI的译码性能，协议规定第二级SCI的第一个符号将对应于一个实际映射的PSSCH DMRS符号。因此，将PT-RS的序列生成过程与第二级SCI的第一个符号关联，可以避免DMRS的位置存在混淆的问题。
另一种示例性说明中，符号位置也可以与时隙中一个携带DMRS的符号相关。
例如，符号位置可以与时隙中第一个携带DMRS的符号相关。举例说明，符号位置可以为时隙中第一个携带DMRS的符号的位置。示例性的，以图8所示的图样为例，符号位置可以为时隙中第一个携带PSSCH DMRS的符号即
Figure PCTCN2020107561-appb-000018
对应的符号。
或者，符号位置也可以为时隙中第一个实际映射的DMRS符号的位置。示例性的，以图8所示的图样为例，符号位置可以为时隙中第一个实际映射的DMRS符号的位置即
Figure PCTCN2020107561-appb-000019
对应的符号。
又例如，符号位置也可以与时隙中最后一个携带DMRS的符号相关。举例说明，符号位置可以为时隙中最后一个携带DMRS的符号的位置。示例性的，以图10所示的图样为例，符号位置可以为时隙中最后一个携带PSSCH DMRS的符号即
Figure PCTCN2020107561-appb-000020
对应的符号。
或者，符号位置也可以为时隙中最后一个实际映射的DMRS符号的位置。示例性的，以图10所示的图样为例，符号位置可以为时隙中最后一个实际映射的DMRS符号的位置即
Figure PCTCN2020107561-appb-000021
对应的符号。
或者，若时隙中最后一个DMRS符号没有被DMRS以外的其他信号占用，符号位置可以为时隙中最后一个DMRS符号的位置，若时隙中最后一个DMRS符号被DMRS以外的其他信号占用，符号位置可以为时隙中倒数第二个DMRS符号的位置。示例性的，当最后一个DMRS符号被PSSCH后紧邻的GAP符号，或者PSFCH前紧邻的AGC符号，或者PSFCH占用的符号，或者PSFCH后紧邻的GAP符号中的任意一个凿去时，该符号位置为倒数第二个PSSCH DMRS符号的位置。示例性的，若SL通信采用图8或图9所示的图样，符号位置可以为时隙中最后一个DMRS符号即
Figure PCTCN2020107561-appb-000022
对应的符号。若SL通信采用图10所示的图样，符号位置可以为时隙中倒数第二个DMRS符号即
Figure PCTCN2020107561-appb-000023
对应的符号。
当然，符号位置可以与时隙中第二个携带DMRS的符号、第三个携带DMRS的符号等相关，这里不再一一展开描述。
再一种示例性说明中，符号位置也可以为时隙中一个固定的符号位置。例如，符号位置可以为时隙中第一符号的位置，第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。举例说明，符号位置可以为
Figure PCTCN2020107561-appb-000024
或者
Figure PCTCN2020107561-appb-000025
对应的OFDM符号的位置，其中，
Figure PCTCN2020107561-appb-000026
为相对于SL传输资源的第一个OFDM符号的偏移值。应理解，
Figure PCTCN2020107561-appb-000027
对应的OFDM符号的位置即为SL传输资源的第一个OFDM符号的位置，
Figure PCTCN2020107561-appb-000028
对应的OFDM符号的位置即为SL传输资源的第二个OFDM符号的位置。
可选的，符号位置对应的DMRS序列可以理解为符号位置对应符号所携带的DMRS序列。或者，符号位置对应的DMRS序列也可以理解为根据该符号位置生成的DMRS序列。
符号位置对应符号可能携带了DMRS序列，也可能没携带DMRS序列。若符号位置对应符号携带DMRS序列，可以根据符号位置对应符号携带的DMRS序列确定PT-RS序列，或者，也可以根据该符号位置生成DMRS序列，然后根据生成的DMRS序列确定PT-RS序列。若符号位置对应符号未携带DMRS序列，可以根据该符号位置生成DMRS序列，然后根据生成的DMRS序列确定PT-RS序列。
可以理解的，“传输”，也可以理解为承载、携带等，例如，“用于传输第二级SCI的符号”，也可以描述为“用于携带第二级SCI的符号”或者“用于承载第二级SCI的符号”或者“携带第二级SCI的符号”或者“承载第二级SCI的符号”等等。又例如，“携带DMRS” 也可以描述为“承载DMRS”或者“传输DMRS”等。
S1102，第一终端设备向第二终端设备发送PT-RS序列。相应的，第二终端设备接收第一终端设备发送的PT-RS序列。
S1103，第二终端设备生成PT-RS序列。
第二终端设备生成PT-RS序列的方式可以与第一终端设备生成PT-RS序列的方式相同，具体可以参阅步骤S1101的相关描述，这里不再重复赘述。
应理解，步骤S1102和步骤S1103没有严格的先后顺序，可以先执行步骤S1102后执行步骤S1103，也可以先执行步骤S1103后执行步骤S1102，也可以同时执行步骤S1102和步骤S1103。
S1104，第二终端设备根据第二终端设备生成的PT-RS序列以及接收到的PT-RS序列进行相位追踪。
本申请实施例一通过明确生成PT-RS时所使用的符号位置，可以使得发送端UE和接收端UE可以基于相同的PT-RS序列进行相位追踪，从而可以提高相位跟踪的准确性，进而可以提升高频段下的SL通信质量。
实施例二：
本申请实施例提供一种DMRS时域图样配置方法。如图12所示，该方法具体可以包括：
S1201，网络设备根据第一配置信息确定第一集合，该第一配置信息用于配置PSFCH的周期。第一集合包括至少一个候选集合，其中，候选集合包括至少一个DMRS时域图样对应的符号数。当PSFCH的周期为非零时，第一集合包括的任一候选集合所包括符号数的数量大于1。
以DMRS的时域图样对应的符号数的候选集合有如下几种集合：{{2},{3},{4},{2,3},{2,4},{3,4},{2,3,4}}为例，对第一集合进行示例性说明。
若第一配置信息配置PSFCH的周期为0，则第一集合可以包括如下几个候选集合中的一个或多个：{2},{3},{4},{2,3},{2,4},{3,4},{2,3,4}。
若第一配置信息配置PSFCH的周期为1或2或4，则第一集合可以包括如下几个候选集合中的一个或多个：{2,3},{2,4},{3,4},{2,3,4}。
S1202，网络设备向第一终端设备发送第二配置信息，第二配置信息用于在第一集合中确定第二集合，第二集合包括至少一个DMRS时域图样对应的符号数。相应的，第一终端设备接收第一配置信息和第二配置信息。
可选的，网络设备还可以向第一终端设备发送第一配置信息。第一终端设备可以根据第一配置信息确定PSFCH的周期。
S1203，第一终端设备根据第二配置信息确定SL传输可以使用的DMRS时域图样。
示例性的，第一终端设备可以根据第二配置信息确定第二集合，并根据第二集合确定SL传输可以使用的DMRS时域图样。例如，当第一配置信息配置PSFCH的周期为非零时，若时隙不存在PSFCH资源，第一终端设备可以使用第二集合中的某一个符号数对应的DMRS时域图样，当时隙存在PSFCH资源，第一终端设备可以使用第二集合中的另一个符号数对应的DMRS时域图样。
例如，假设第二集合为{2,3,4}，若时隙不存在PSFCH资源，第一终端设备可以使用2个DMRS符号对应的DMRS时域图样(或者3个DMRS符号对应的DMRS时域图样，或 者4个DMRS符号对应的DMRS时域图样)，若时隙存在PSFCH资源，第一终端设备可以使用2个DMRS符号对应的DMRS时域图样(或者3个DMRS符号对应的DMRS时域图样)，以避免最后一个DMRS符号被凿去。
本申请实施例二中通过限制网络设备对于资源池上DMRS时域图样的配置方法，当网络设备配置PSFCH的周期非零时，可以配置多个DMRS时域图样。如此，当SL通信中某一个时隙存在PSFCH资源时，发送端UE可以使用另一个DMRS时域图样与接收端UE之间进行通信，从而可以避免最后一个DMRS符号被PSSCH后紧邻的GAP符号，或者PSFCH前紧邻的AGC符号，或者PSFCH占用的符号，或者PSFCH后紧邻的GAP符号中的任意一个凿去的情况，使得发送端UE和接收端UE生成一致的SL PT-RS序列，从而接收端UE可以准确接收PT-RS序列，进而可以提高相位跟踪的准确性，可以提升高频段下的SL通信质量。
基于与方法实施例的同一技术构思，本申请实施例提供一种通信装置，该通信装置的结构可以如图13所示，包括处理单元1301和收发单元1302。
一种实现方式中，通信装置具体可以用于实现图如11的实施例中第一终端设备执行的方法，该装置可以是第一终端设备本身，也可以是第一终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，处理单元1301，用于根据符号位置对应的DMRS序列生成PT-RS序列，符号位置与用于传输第二级SCI的符号相关，或者，符号位置与时隙中一个携带DMRS的符号相关，或者，符号位置为时隙中一个固定的符号位置；收发单元1302，用于向第二终端设备发送PT-RS序列。
一种示例性说明中，符号位置可以为第二级SCI的第一个符号对应的DMRS符号的位置；或者，符号位置也可以为第二级SCI的第一个符号的位置。
另一种示例性说明中，符号位置可以为时隙中最后一个携带DMRS的符号的位置；或者，符号位置可以为时隙中最后一个实际映射的DMRS符号的位置；或者，若时隙中最后一个DMRS符号被DMRS以外的其他信号占用，符号位置可以为时隙中倒数第二列DMRS符号的位置。
又一种示例性说明中，符号位置可以为时隙中第一个携带DMRS的符号的位置；或者，符号位置可以为时隙中第一个实际映射的DMRS符号的位置。
再一种示例性说明中，符号位置可以为时隙中第一符号的位置，第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。
可选的，符号位置对应的DMRS序列可以为符号位置对应符号所携带的DMRS序列；
或者，符号位置对应的DMRS序列也可以为根据符号位置生成的DMRS序列。
一种实现方式中，通信装置具体可以用于实现图如11的实施例中第二终端设备执行的方法，该装置可以是第二终端设备本身，也可以是第二终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，处理单元1301，用于根据符号位置对应的DMRS序列生成第一PT-RS序列，符号位置与用于传输第二级SCI的符号相关，或者，符号位置与时隙中一个携带DMRS的符号相关，或者，符号位置为时隙中一个固定的符号位置；收发单元1302，用于接收来自第一终端设备的第二PT-RS序列。处理单元1301，还用于根据第一PT-RS序列和第二PT-RS序列进行相位追踪。
一种示例性说明中，符号位置可以为第二级SCI的第一个符号对应的DMRS符号的位置；或者，符号位置也可以为第二级SCI的第一个符号的位置。
另一种示例性说明中，符号位置可以为时隙中最后一个携带DMRS的符号的位置；或者，符号位置可以为时隙中最后一个实际映射的DMRS符号的位置；或者，若时隙中最后一个DMRS符号被DMRS以外的其他信号占用，符号位置可以为时隙中倒数第二列DMRS符号的位置。
又一种示例性说明中，符号位置可以为时隙中第一个携带DMRS的符号的位置；或者，符号位置可以为时隙中第一个实际映射的DMRS符号的位置。
再一种示例性说明中，符号位置可以为时隙中第一符号的位置，第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。
可选的，符号位置对应的DMRS序列可以为符号位置对应符号所携带的DMRS序列；
或者，符号位置对应的DMRS序列也可以为根据符号位置生成的DMRS序列。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。可以理解的是，本申请实施例中各个模块的功能或者实现可以进一步参考方法实施例的相关描述。
一种可能的方式中，通信装置可以如图14所示，该通信装置可以是通信设备或者通信设备中的芯片，其中，通信设备可以为终端设备，也可以为网络设备。该装置可以包括处理器1401，通信接口1402，存储器1403。其中，上述图13中的处理单元1301可以为这里的处理器1401，上述图13中的收发单元1302可以为这里的通信接口1402。
处理器1401，可以是一个中央处理模块(central processing unit，CPU)，或者为数字处理模块等等。通信接口1402可以是收发器、也可以为接口电路如收发电路等、也可以为收发芯片等等。该装置还包括：存储器1403，用于存储处理器1401执行的程序。存储器1403可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器1403是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器1401用于执行存储器1403存储的程序代码，具体用于执行上述处理单元1301的动作，本申请在此不再赘述。通信接口1402具体用于执行上述收发单元1302的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口1402、处理器1401以及存储器1403之间的具体连接介质。本申请实施例在图14中以存储器1403、处理器1401以及通信接口1402之间通过总线1404连接，总线在图14中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图14中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或 方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (19)

  1. 一种参考信号序列生成方法，其特征在于，包括：
    根据符号位置对应的解调参考信号DMRS序列生成相位跟踪参考信号PT-RS序列，所述符号位置与用于传输第二级侧行链路控制信息SCI的符号相关，或者，所述符号位置与时隙中一个携带DMRS的符号相关，或者，所述符号位置为时隙中一个固定的符号位置；
    向第二终端设备发送所述PT-RS序列。
  2. 如权利要求1所述的方法，其特征在于，所述符号位置为第二级SCI的第一个符号对应的DMRS符号的位置；
    或者，所述符号位置为第二级SCI的第一个符号的位置。
  3. 如权利要求1所述的方法，其特征在于，所述符号位置为时隙中最后一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中最后一个实际映射的DMRS符号的位置；
    或者，若时隙中最后一个DMRS符号被所述DMRS以外的其他信号占用，所述符号位置为时隙中倒数第二列DMRS符号的位置；
    或者，所述符号位置为时隙中第一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中第一个实际映射的DMRS符号的位置。
  4. 如权利要求1所述的方法，其特征在于，所述符号位置为时隙中第一符号的位置，所述第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。
  5. 如权利要求2-4任一项所述的方法，其特征在于，所述符号位置对应的DMRS序列为所述符号位置对应符号所携带的DMRS序列；
    或者，所述符号位置对应的DMRS序列为根据所述符号位置生成的DMRS序列。
  6. 一种参考信号序列生成方法，其特征在于，包括：
    根据符号位置对应的解调参考信号DMRS序列生成第一相位跟踪参考信号PT-RS序列，所述符号位置与用于传输第二级侧行链路控制信息SCI的符号相关，或者，所述符号位置与时隙中一个携带DMRS的符号相关，或者，所述符号位置为时隙中一个固定的符号位置；
    接收来自第一终端设备的第二PT-RS序列；
    根据所述第一PT-RS序列和所述第二PT-RS序列进行相位追踪。
  7. 如权利要求6所述的方法，其特征在于，所述符号位置为第二级SCI的第一个符号对应的DMRS符号的位置；
    或者，所述符号位置为第二级SCI的第一个符号的位置。
  8. 如权利要求6所述的方法，其特征在于，所述符号位置为时隙中最后一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中最后一个实际映射的DMRS符号的位置；
    或者，若时隙中最后一个DMRS符号被所述DMRS以外的其他信号占用，所述符号位置为时隙中倒数第二列DMRS符号的位置；
    或者，所述符号位置为时隙中第一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中第一个实际映射的DMRS符号的位置。
  9. 如权利要求6所述的方法，其特征在于，所述符号位置为时隙中第一符号的位置，所述第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。
  10. 如权利要求7-9任一项所述的方法，其特征在于，所述符号位置对应的DMRS序列为所述符号位置对应符号所携带的DMRS序列；
    或者，所述符号位置对应的DMRS序列为根据所述符号位置生成的DMRS序列。
  11. 一种参考信号序列生成装置，其特征在于，包括：
    处理单元，用于根据符号位置对应的解调参考信号DMRS序列生成相位跟踪参考信号PT-RS序列，所述符号位置与用于传输第二级侧行链路控制信息SCI的符号相关，或者，所述符号位置与时隙中一个携带DMRS的符号相关，或者，所述符号位置为时隙中一个固定的符号位置；
    收发单元，用于向第二终端设备发送所述PT-RS序列。
  12. 一种参考信号序列生成装置，其特征在于，包括：
    处理单元，用于根据符号位置对应的解调参考信号DMRS序列生成第一相位跟踪参考信号PT-RS序列，所述符号位置与用于传输第二级侧行链路控制信息SCI的符号相关，或者，所述符号位置与时隙中一个携带DMRS的符号相关，或者，所述符号位置为时隙中一个固定的符号位置；
    收发单元，用于接收来自第一终端设备的第二PT-RS序列；
    所述处理单元，还用于根据所述第一PT-RS序列和所述第二PT-RS序列进行相位追踪。
  13. 如权利要求11或12所述的装置，其特征在于，所述符号位置为第二级SCI的第一个符号对应的DMRS符号的位置；
    或者，所述符号位置为第二级SCI的第一个符号的位置。
  14. 如权利要求11或12所述的装置，其特征在于，所述符号位置为时隙中最后一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中最后一个实际映射的DMRS符号的位置；
    或者，若时隙中最后一个DMRS符号被所述DMRS以外的其他信号占用，所述符号位置为时隙中倒数第二列DMRS符号的位置；
    或者，所述符号位置为时隙中第一个携带DMRS的符号的位置；
    或者，所述符号位置为时隙中第一个实际映射的DMRS符号的位置。
  15. 如权利要求11或12所述的装置，其特征在于，所述符号位置为时隙中第一符号的位置，所述第一符号相对于侧行传输资源的第一个符号的位置的偏移值为预设值。
  16. 如权利要求11-15任一项所述的装置，其特征在于，所述符号位置对应的DMRS序列为所述符号位置对应符号所携带的DMRS序列；
    或者，所述符号位置对应的DMRS序列为根据所述符号位置生成的DMRS序列。
  17. 一种通信设备，其特征在于，包括收发器、处理器和存储器；所述存储器中存储有程序指令；当所述程序指令被所述处理器执行时，使得所述通信设备通过所述收发器执行如权利要求1至5任一所述的方法，或者，使得所述通信设备通过所述收发器执行如权利要求6至10任一所述的方法。
  18. 一种芯片，其特征在于，所述芯片与电子设备中的存储器耦合，使得所述芯片在运行时调用所述存储器中存储的程序指令，实现如权利要求1至5任一所述的方法，或者，实现如权利要求6至10任一所述的方法。
  19. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括程序指令，当所述程序指令在终端设备上运行时，使得所述终端设备执行如权利要求1至10任一所 述的方法。
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