Communication method and apparatus, and communication device

Abstract

The embodiments of the present disclosure relate to the technical field of mobile communications. Provided are a communication method and apparatus, and a communication device. A transmitting end device sends, on a reference signal sending position in a reference signal pattern, one or more reference signals corresponding to one or more antenna ports, wherein the reference signal pattern is used for an orthogonal time frequency and space (OTFS) modulation system. The solution can be applied to an MIMO-OTFS system, and achieves the function of sending a reference signal in the MIMO-OTFS system.

Description

Communication method, device and communication equipment Technical Field

[0001] The present disclosure relates to the field of mobile communication technology, and in particular to a communication method, apparatus, and communication equipment. Background Art

[0002] Most of the current wireless communication systems can only guarantee a high data transmission rate and provide high-quality services in low-speed or medium-speed mobile environments, but their coverage and transmission efficiency are severely limited in high-speed mobile scenarios. Orthogonal Time Frequency and Space (OTFS) modulation has a more significant performance gain than existing modulation schemes (such as OFDM orthogonal frequency division multiplexing). Multiple-Input Multiple-Output (MIMO) multi-antenna technology fully utilizes spatial resources and greatly improves the spectrum efficiency of wireless communication systems. The MIMO-OTFS system can combine the advantages of multi-antenna technology and OTFS waveforms, taking into account the needs of high-speed mobility and high spectrum efficiency. However, there is currently no solution to the problem of sending reference signals (RS) in MIMO-OTFS systems.

[0003] Summary of the Invention

[0004] The present disclosure proposes a communication method, apparatus, and communication equipment, constructs a reference signal transmission position pattern and a reference signal transmission scheme, which can be applied to a MIMO-OTFS system, realizes the function of transmitting a reference signal in the MIMO-OTFS system, and solves the problem of being unable to transmit a reference signal in the MIMO-OTFS system.

[0005] A first aspect embodiment of the present disclosure provides a communication method, which is performed by a transmitting device. The method includes: sending one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system.

[0006] In some embodiments of the present disclosure, the method further includes determining a reference signal pattern, wherein a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern. The guard interval can block negative effects caused by delay frequency shift or Doppler frequency shift.

[0007] In some embodiments of the present disclosure, determining a reference signal pattern includes: determining the number of antenna ports; determining configuration parameters for the reference signal pattern; and determining the reference signal pattern based on the number of antenna ports and the configuration parameters in accordance with protocol specifications. This implementation allows the reference signal pattern to be adapted to the number of antenna ports, facilitating reference signal transmission.

[0008] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0009] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0010] In some embodiments of the present disclosure, the method further includes determining, based on a base sequence and a first parameter, one or more reference signal sequences corresponding to one or more antenna ports, wherein the base sequence corresponding to different antenna ports is the same, and the value of the first parameter corresponding to different antenna ports is different. This implementation ensures that the sequences are mutually orthogonal.

[0011] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0012] In some embodiments of the present disclosure, the method further includes: sending a reference signal pattern and / or the first parameter to a receiving device.

[0013] In some embodiments of the present disclosure, the method further includes: mapping a sequence of one or more reference signals to a reference signal transmission position according to a reference signal pattern.

[0014] In some embodiments of the present disclosure, mapping a sequence of one or more reference signals to a reference signal transmission position according to a reference signal pattern includes: mapping a sequence of one or more reference signals to a reference signal transmission position according to a preset mapping order and a reference signal pattern.

[0015] A second aspect of the present disclosure provides a communication method, which is performed by a receiving device. The method includes: receiving one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) system.

[0016] In some embodiments of the present disclosure, a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. The guard interval can block the negative effects caused by delay frequency shift or Doppler frequency shift.

[0017] In some embodiments of the present disclosure, the reference signal pattern is determined based on the number of antenna ports and configuration parameters of the reference signal pattern according to protocol agreement. This implementation method can adapt the reference signal pattern to the number of antenna ports, which facilitates sending reference signals.

[0018] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0019] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <kp +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0020] In some embodiments of the present disclosure, one or more reference signal sequences corresponding to one or more antenna ports are determined based on a base sequence and a first parameter. Different antenna ports have the same base sequence, but different antenna ports have different values ​​for the first parameter. This implementation ensures that the sequences are mutually orthogonal.

[0021] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0022] In some embodiments of the present disclosure, the method further includes: receiving a reference signal pattern and / or a first parameter sent by a transmitting device.

[0023] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a reference signal pattern.

[0024] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a preset mapping order and a reference signal pattern.

[0025] In some embodiments of the present disclosure, the method further includes: determining a first reference signal from one or more reference signals; and demodulating the first reference signal.

[0026] An embodiment of the third aspect of the present disclosure provides a communication device, which includes a transceiver module for sending one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system.

[0027] An embodiment of the fourth aspect of the present disclosure provides a communication device, which includes a transceiver module for: receiving one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system.

[0028] The fifth aspect embodiment of the present disclosure provides a communication device, which includes: a transceiver; a memory; and a processor, which is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, and can implement the method of the first aspect embodiment or the second aspect embodiment of the present disclosure.

[0029] The sixth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the method of the first aspect embodiment or the second aspect embodiment of the present disclosure can be implemented.

[0030] The seventh aspect embodiment of the present disclosure provides a communication system, which includes a transmitting end device and a receiving end device, wherein: the transmitting end device is used to execute the method as in the first aspect embodiment of the present disclosure; the receiving end device is used to execute the method as in the second aspect embodiment of the present disclosure.

[0031] According to the communication method disclosed herein, a transmitting device sends one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system. This communication method can be applied to a MIMO-OTFS system, thereby realizing the function of sending a reference signal in the MIMO-OTFS system and solving the problem of being unable to send a reference signal in the MIMO-OTFS system.

[0032] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] FIG1 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0035] FIG2 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0036] FIG3 is a schematic diagram of a reference signal pattern according to an embodiment of the present disclosure;

[0037] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0038] FIG5 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0039] FIG6 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0040] FIG7 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0041] FIG8 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure;

[0042] FIG9 is a schematic block diagram of a communication device according to an embodiment of the present disclosure;

[0043] FIG10 is a schematic block diagram of a communication device according to an embodiment of the present disclosure;

[0044] FIG11 is a schematic block diagram of a communication device according to an embodiment of the present disclosure;

[0045] FIG12 is a schematic block diagram of a communication device according to an embodiment of the present disclosure;

[0046] FIG13 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure;

[0047] FIG14 is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0049] To facilitate understanding of the contents of the embodiments of the present disclosure, the relevant technologies involved in the present disclosure are introduced below.

[0050] In recent years, the large-scale development of high-speed railways (HSR) and the increasing popularity of vehicle communication systems on highways have garnered widespread attention for wireless communication systems in high-speed mobility environments. 5G systems aim to provide bursty broadband services to users on trains traveling at speeds up to 500 km / h or in highly mobile vehicles, guaranteeing data rates of up to 150 Mbps. However, most current wireless communication systems can only guarantee high data rates and high-quality services in low- or medium-speed environments, severely limiting their coverage and transmission efficiency in high-speed mobility scenarios.

[0051] Communication systems in high-mobility scenarios face the following major challenges: First, rapid time-varying fading. Increased mobility leads to large Doppler shifts and spreads in the communication system, severely degrading communication performance. Furthermore, changes in terminal speed can cause changes in the attenuation coefficient and time-varying Doppler spread. The rapid changes in the wireless transmission environment further complicate channel analysis and modeling. Second, frequency offset. At the receiving end of the system, Doppler offset in the received signal leads to frequency mismatch between the transmitter and receiver. In multi-carrier systems, carrier frequency offset (CFO) destroys the orthogonality between carriers and introduces inter-carrier interference (CI). The time-varying nature of Doppler offset in high-mobility scenarios poses new challenges to the accuracy of Doppler estimation and tracking. Designing new network architectures to meet these characteristics and ensure communication performance requirements in high-mobility scenarios, ensuring the reliability and accuracy of rapid and frequent handoffs, and addressing the high signal penetration loss in high-speed rail systems are all pressing issues that need to be addressed.

[0052] OTFS modulation is a two-dimensional modulation scheme designed in the delay-Doppler (DD) domain. Unlike traditional modulation schemes based on the time-frequency (TF) domain, it transforms a dual-dispersion channel into a nearly flat-fading channel in the delay-Doppler domain through a series of two-dimensional transformations. In this domain, each symbol in a data frame experiences the same, almost constant fading, resulting in significant performance gains over existing modulation schemes such as OFDM. MIMO (Multi-Input Multiple-Output) multi-antenna technology fully utilizes spatial resources, significantly improving the spectral efficiency of wireless communication systems and becoming a key technology in current wireless communications.

[0053] In summary, the MIMO-OTFS system combines the advantages of multi-antenna technology and OTFS waveforms, meeting the requirements of high-speed mobility and high spectral efficiency, and can solve the problems faced by current communication systems in high-speed mobility scenarios. However, in the research and application of MIMO-OTFS systems, there is currently no solution to the problem of transmitting reference signals in MIMO-OTFS systems.

[0054] To this end, the present disclosure proposes a communication method, apparatus, and communication equipment, constructs a reference signal transmission position pattern and a reference signal transmission scheme, wherein a transmitting device sends one or more reference signals corresponding to one or more antenna ports to a receiving device at a reference signal transmission position in the reference signal pattern, wherein the reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system. This transmission scheme can be applied to a MIMO-OTFS system, realizing the function of sending a reference signal in the MIMO-OTFS system, and solving the problem of being unable to send a reference signal in the MIMO-OTFS system.

[0055] The communication solution provided in this application is described in detail below with reference to the accompanying drawings.

[0056] First, embodiments of the present disclosure provide a communication system, including a transmitter and a receiver. The communication system may include, but is not limited to, one transmitter and one receiver. In practical applications, one or more transmitters and one or more receivers may be included.

[0057] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as long-term evolution (LTE) systems, fifth-generation (5G) mobile communication systems, 5G new radio (NR) systems, or other future new mobile communication systems.

[0058] In the embodiments of the present disclosure, the transmitting end device may be a terminal or a network device, and correspondingly, the receiving end device may be a network device or a terminal, which is not limited in the present disclosure.

[0059] The network device in the embodiments of the present disclosure is an entity on the network side for transmitting or receiving signals. For example, the network device can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device.

[0060] The network device provided by the embodiment of the present disclosure may be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU may also be called a control unit. The CU-DU structure may be used to split the protocol layer of a network device, such as a base station, with some functions of the protocol layer being centrally controlled by the CU, and the remaining functions of some or all of the protocol layers being distributed in the DU, which is centrally controlled by the CU.

[0061] The terminal device in the embodiments of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device may be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving (self-driving), a wireless terminal device in remote medical surgery (remote medical surgery), a wireless terminal device in a smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), a wireless terminal device in a smart home (smart home), etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.

[0062] Figure 1 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 1 , the method is executed by a transmitting device.

[0063] As shown in FIG1 , the method may include the following steps.

[0064] S101: Send one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern.

[0065] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0066] In the embodiments of the present disclosure, a reference signal, also known as a "pilot" signal, is a known signal provided by a transmitter to a receiver for channel estimation or channel sounding. Reference signals include, but are not limited to, a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), a sounding reference signal (SRS), and a channel state information reference signal (CSI-RS).

[0067] In the embodiments of the present disclosure, the transmitting end may be a terminal or a network device. For example, when the transmitting end is a network device, the reference signal may be a DMRS, etc., and when the transmitting end is a terminal, the reference signal may be an SRS, etc.

[0068] In an embodiment of the present disclosure, a reference signal pattern is used in an OTFS modulation system. The OTFS modulation system transmits information in the delay-Doppler domain. The position coordinates on the reference signal pattern include delay domain coordinates and Doppler domain coordinates. The present disclosure standardizes the reference signal transmission position through the reference signal pattern, specifically through the Doppler domain coordinates and delay coordinates of the reference signal transmission position on the reference signal pattern.

[0069] In some embodiments of the present disclosure, each antenna port has the same reference signal pattern, that is, the reference signal of each antenna port is sent at the same position in the delay-Doppler domain.

[0070] In some embodiments of the present disclosure, different antenna ports use different reference signal sequences. The transmitting end device may map the reference signal sequences of one or more antenna ports to the same reference signal sending position in the delay-Doppler domain, and send one or more reference signals at the reference signal sending position.

[0071] In some embodiments of the present disclosure, the reference signal sequences used by different antenna ports are orthogonal. Therefore, when the transmitting device sends one or more reference signals corresponding to multiple antenna ports, the orthogonality of the reference signal sequences of different antenna ports can be used to distinguish different antenna ports, ensuring that the signal transmission does not interfere with each other. It can be applied to a multi-antenna system with multiple inputs and multiple outputs.

[0072] It should be noted that the solution disclosed in the present invention can be applied to OTFS modulation systems and multi-input multi-output multi-antenna systems to solve the problem of reference signal transmission in MIMO-OTFS systems, promote the construction of MIMO-OTFS systems, and promote the construction of communication systems that meet their communication performance requirements in high-mobility scenarios.

[0073] According to the communication method disclosed herein, a transmitting device sends one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system. This communication method can be applied to a MIMO-OTFS system, thereby realizing the function of sending a reference signal in the MIMO-OTFS system.

[0074] Based on the embodiment shown in Figure 1, Figure 2 shows a flow chart of a communication method according to an embodiment of the present disclosure, which is executed by a transmitting device. For ease of understanding, Figure 3 is a schematic diagram of a reference signal pattern provided by the present disclosure.

[0075] As shown in FIG2 , the method may include the following steps.

[0076] S201: Determine a reference signal pattern.

[0077] There is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern, which can block the negative effects caused by delay frequency shift or Doppler frequency shift.

[0078] In some embodiments, Figure 3 shows a schematic diagram of a reference signal pattern provided by the present disclosure. As shown in Figure 3, the reference signal pattern includes a reference signal sending position, a data sending position, and a guard interval, and the guard interval is located between the reference signal sending position and the data sending position.

[0079] It should be noted that in the delay-Doppler domain, due to delay and Doppler frequency shift, the position set to zero at the transmitter may receive a non-zero signal at the receiver (due to the channel impulse response). Since the delay-Doppler channel is a multipath channel, the delay and Doppler are not unique. Setting a guard interval can be used for channel estimation. The estimated result can be used for channel demodulation and can also be used to feedback channel state information (CSI).

[0080] In some embodiments, the guard interval should be greater than or equal to the maximum delay spread of the channel in the delay domain, and should be greater than or equal to the maximum Doppler frequency shift in the Doppler domain.

[0081] In some embodiments of the present disclosure, determining the reference signal pattern includes: determining the number of antenna ports; determining configuration parameters of the reference signal pattern; and determining the reference signal pattern according to protocol agreement based on the number of antenna ports and the configuration parameters.

[0082] For example, when applicable to a 5G NR system, the number of antenna ports supported by the NR system is 1, 2, 4, 8, 12, 16, 24, and 32. The number of antenna ports may also be other values, which is not limited by the present disclosure.

[0083] In an embodiment of the present disclosure, the values ​​of configuration parameters are determined based on the number of antenna ports. For example, if the number of antenna ports is 4, 8, 12, or 16, four sets of configuration parameter values ​​are determined based on the number of antenna ports, respectively. If the standard corresponding to 12 antenna ports is currently applicable, the transmitting device configures the parameter values ​​based on the standard corresponding to 12 antenna ports to determine the applicable reference signal pattern. This implementation allows the reference signal pattern to adapt to the number of antenna ports, facilitating reference signal transmission.

[0084] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0085] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0086] In the embodiment of the present disclosure, the minimum unit of resources in OTFS modulation consists of an OTFS symbol in the delay domain and an OTFS subcarrier in the Doppler domain. N represents the number of OTFS symbols in the delay domain on a scheduling unit of the transmitting end device, and M represents the number of OTFS subcarriers in the Doppler domain on a scheduling unit. g Indicates the number of OTFS symbols corresponding to the delay domain guard interval, N g Indicates the number of OTFS subcarriers corresponding to the Doppler domain guard interval.

[0087] In the embodiment of the present disclosure, the first symbol may represent any symbol of the reference signal sequence, N p is the Doppler domain subcarrier length corresponding to the transmission position of all symbols of the reference signal sequence, is the length occupied by the transmission position of the reference signal in the Doppler domain, M p is the delay domain symbol length corresponding to the transmission position of all symbols of the reference signal sequence, and is the length occupied by the transmission position of the reference signal in the time domain.

[0088] In the embodiment of the present disclosure, 0<l p <N-1, which limits the delay domain index value of the reference signal transmission position to the delay domain OTFS symbol length on a scheduling unit; 0<k p <M-1, which limits the Doppler domain index value of the reference signal transmission position to the Doppler domain OTFS subcarrier symbol length on a scheduling unit, 0 < l p -N g <l p <l p +N g <N-1, indicating that a certain interval N is reserved for the reference signal transmission position in the delay domain g As a protection interval, it can prevent the position set to zero at the transmitter from receiving a non-zero signal at the receiver due to time delay and frequency shift. p -M g <k p <k p +M g <M-1, indicating that a certain interval M is reserved for the reference signal sending position in the Doppler domain g As a guard interval, it can prevent the receiving end from receiving a non-zero signal at the position set to zero at the transmitting end due to Doppler frequency shift.

[0089] In one embodiment, as shown in FIG4 , the coordinates of the first symbol in the delay-Doppler domain are (l p , k p ), if the first symbol refers to the coordinate of the lower left corner of the gray area in the figure, k represents the Doppler domain index value of the reference signal transmission position, and l represents the delay domain index value of the reference signal transmission position, then the position index of the reference signal is as follows: k = k p ,…,k p +N p -1, l=l p ,…,l p +M p -1

[0090] S202: Send one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern.

[0091] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0092] The specific explanation of step S202 can refer to step S101 in the embodiment shown in FIG1 , and will not be repeated here.

[0093] In summary, according to the communication method disclosed in the present invention, the transmitting device determines a reference signal pattern, wherein there is a protection interval between the reference signal sending position and the data sending position in the reference signal pattern, and one or more reference signals corresponding to one or more antenna ports are sent at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system. The communication method constructs a reference signal sending position pattern and a reference signal sending scheme, which can be applied to a MIMO-OTFS system, thereby realizing the function of sending a reference signal in a MIMO-OTFS system.

[0094] Based on the embodiment shown in FIG. 1 and / or FIG. 2 , FIG. 4 shows a flow chart of a communication method according to an embodiment of the present disclosure, which is executed by a transmitting end device.

[0095] As shown in FIG4 , the method may include the following steps.

[0096] S301: Determine a reference signal pattern.

[0097] There is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern, which can block the negative effects caused by delay frequency shift or Doppler frequency shift.

[0098] In some embodiments of the present disclosure, determining a reference signal pattern includes: determining the number of antenna ports; determining configuration parameters for the reference signal pattern; and determining the reference signal pattern based on the number of antenna ports and the configuration parameters in accordance with protocol specifications. This implementation allows the reference signal pattern to be adapted to the number of antenna ports, facilitating reference signal transmission.

[0099] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0100] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0101] The specific explanation of the above embodiment can refer to step S201 of the embodiment shown in FIG. 2 , which will not be repeated here.

[0102] S302: Determine, according to a base sequence and a first parameter, one or more reference signal sequences corresponding to one or more antenna ports.

[0103] The base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different. This implementation method can ensure that the sequences are orthogonal to each other.

[0104] In an embodiment of the present disclosure, it is assumed that there are multiple antenna ports, the reference signal of each antenna port has the same position in the delay-Doppler domain, and the transmission position of the reference signal sequence of each antenna port is the same on the reference signal pattern, but the reference signal sequences of different antenna ports are different.

[0105] In some embodiments, the reference signal sequences used by multiple antenna ports are mutually orthogonal. To ensure the orthogonality of the reference signal sequences of different antenna ports, a base sequence and a first parameter are used to determine the reference signal sequence corresponding to the antenna port.

[0106] In the embodiments of the present disclosure, a base sequence is a basic sequence of a reference signal, and multiple reference signal sequences are defined by using one base sequence through different shift parameter values.

[0107] The base sequence is a pseudo-random sequence, which can be any one of a ZC (Zaddoff-Chu) sequence, an M sequence, a gold sequence, or other sequences, which is not limited in the present disclosure.

[0108] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0109] In one embodiment, the reference signal sequences of different antenna ports use the same base sequence plus different OCC codes. Before sending the reference signals corresponding to the antenna ports, the OCC codes corresponding to the different antenna ports need to be sent to the receiving device.

[0110] Furthermore, OCC codes are orthogonal cover codes. Adding different OCC codes to a base sequence as reference signal sequences for different antenna ports ensures that the reference signal sequences for different antenna ports are mutually orthogonal. Specifically, a Walsh function orthogonal code consisting of {+1, -1} can be used, as can other OCC codes, and this disclosure is not limited thereto.

[0111] In another embodiment, the reference signal sequences of different antenna ports use the same base sequence plus different cyclic shift offset values. Before sending the reference signal corresponding to the antenna port, the cyclic shift offset values ​​corresponding to the different antenna ports need to be sent to the receiving device.

[0112] For example, the reference signal sequence of the first antenna port is determined based on a base sequence cyclically shifted by 4 bits, and the reference signal sequence of the second antenna port is determined based on a base sequence cyclically shifted by 8 bits. The receiving device only needs to be informed of the number of cyclic shift bits.

[0113] In other embodiments, the terminal may be informed of the cyclic shift type according to the number of antenna ports. For example, if the number of antenna ports is 8 and the reference signal sequence is 128 bits, and the cyclic shift type includes type 1 and type 2, type 1 is 8 bits and type 2 is 16 bits, the receiving device may be informed of the cyclic shift type.

[0114] S303: Send a reference signal pattern and / or a first parameter to a receiving device.

[0115] In the embodiment of the present disclosure, the receiving end device needs to be informed in advance of the reference signal pattern and the first parameter of the antenna port used when sending the reference signal, so that the receiving end device can distinguish the reference signals of different antenna ports and demodulate the reference signals.

[0116] In the embodiment of the present disclosure, since the base sequences corresponding to different antenna ports are the same, the receiving device only needs to obtain the first parameter of the antenna port based on the base sequence agreed upon in the protocol to distinguish the reference signals sent by different antenna ports.

[0117] It can be understood that in the implementation of this solution, only the method for determining the reference signal pattern in this disclosure may be used to send the reference signal pattern to the receiving device, and the orthogonality of the reference signal transmission of different antenna ports may be ensured by other means. Alternatively, only the method for determining the orthogonality of the reference signal sequence of the antenna port in this disclosure may be used to send the first parameter to the receiving device, and other methods may be used to determine the reference signal pattern for the OTFS modulation system. This disclosure is not limited.

[0118] S304: Map one or more reference signal sequences to reference signal transmission positions according to the reference signal pattern.

[0119] In other words, the transmitting end device maps one or more reference signal sequences to the same reference signal sending position in the delay-Doppler domain according to the reference signal pattern, so as to send the reference signal at the corresponding sending position.

[0120] In some embodiments of the present disclosure, mapping a sequence of one or more reference signals to a reference signal transmission position according to a reference signal pattern includes: mapping a sequence of one or more reference signals to a reference signal transmission position according to a preset mapping order and a reference signal pattern.

[0121] In other words, one or more reference signal sequences are mapped to reference signal transmission positions according to a determined reference signal pattern using the same pre-set mapping order. For example, in the reference signal pattern shown in FIG4 , the reference signal transmission position can be placed first along the direction of the delay domain and then along the direction of the Doppler domain. It can also be placed along the direction of the Doppler domain and then along the direction of the delay domain, etc. It can also be placed in other predefined orders, which are not limited in the present disclosure. However, a mapping order needs to be determined in advance, and different reference signal sequences are mapped using the same mapping order to ensure that the orthogonality of different reference signal sequences is not destroyed.

[0122] S305 : Send one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in the reference signal pattern.

[0123] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0124] The specific explanation of step S305 can refer to step S101 in the embodiment shown in FIG1 , and will not be repeated here.

[0125] In summary, according to the communication method disclosed in the present invention, the communication method constructs a reference signal sending position pattern and a reference signal sending scheme, each antenna port has the same reference signal sending position, and the reference signal sequences of different antenna ports are mutually orthogonal. The transmitting device determines the reference signal pattern, and determines the sequence of one or more reference signals corresponding to one or more antenna ports based on the base sequence and the first parameter, and sends the reference signal pattern and / or the first parameter to the receiving device. According to the reference signal pattern, the sequence of one or more reference signals is mapped to the reference signal sending position, and one or more reference signals corresponding to one or more antenna ports are sent at the reference signal sending position in the reference signal pattern. This method can be applied to the MIMO-OTFS system, and realizes the function of sending reference signals in the MIMO-OTFS system.

[0126] FIG5 is a schematic flow chart of a communication method according to an embodiment of the present disclosure, which is executed by a receiving device.

[0127] As shown in FIG5 , the method may include the following steps.

[0128] S401: Receive one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern.

[0129] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0130] In the embodiments of the present disclosure, a reference signal, also known as a "pilot" signal, is a known signal provided by a transmitter to a receiver for channel estimation or channel sounding. Reference signals include, but are not limited to, a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), a sounding reference signal (SRS), and a channel state information reference signal (CSI-RS).

[0131] In the embodiments of the present disclosure, the receiving end corresponds to the transmitting end. If the transmitting end is a terminal, the receiving end may be a network device. If the transmitting end is a network device, the receiving end may be a terminal. This disclosure does not limit this.

[0132] In an embodiment of the present disclosure, a reference signal pattern is used in an OTFS modulation system. The OTFS modulation system transmits information in the delay-Doppler domain. The position coordinates on the reference signal pattern include delay domain coordinates and Doppler domain coordinates. The present disclosure standardizes the reference signal transmission position through the reference signal pattern, specifically through the Doppler domain coordinates and delay coordinates of the reference signal transmission position on the reference signal pattern.

[0133] In some embodiments of the present disclosure, each antenna port has the same reference signal pattern, that is, the reference signal of each antenna port is sent at the same position in the delay-Doppler domain.

[0134] In some embodiments of the present disclosure, different antenna ports use different reference signal sequences, and the reference signal sequences used by different antenna ports are orthogonal. When a receiving device receives one or more reference signals corresponding to multiple antenna ports, it can distinguish the reference signals sent by different antenna ports, and can be applied to a multi-antenna system with multiple inputs and multiple outputs.

[0135] It should be noted that the solution disclosed in the present invention can be applied to OTFS modulation systems and multi-input multi-output multi-antenna systems to solve the problem of reference signal transmission in MIMO-OTFS systems, promote the construction of MIMO-OTFS systems, and promote the construction of communication systems that meet their communication performance requirements in high-mobility scenarios.

[0136] In summary, according to the communication method disclosed in the present invention, the receiving device receives one or more reference signals corresponding to one or more antenna ports at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space (OTFS) modulation system. The communication method can be applied to the MIMO-OTFS system, realizing the function of sending the reference signal in the MIMO-OTFS system.

[0137] Based on the embodiment shown in Figure 5, Figure 6 shows a flow chart of a communication method according to an embodiment of the present disclosure. The method is executed by a receiving device.

[0138] As shown in FIG6 , the method may include the following steps.

[0139] S501: Receive a reference signal pattern and / or a first parameter sent by a transmitting end device.

[0140] In some embodiments of the present disclosure, a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. The guard interval can block the negative effects caused by delay frequency shift or Doppler frequency shift.

[0141] In some embodiments, the guard interval should be greater than or equal to the maximum delay spread of the channel in the delay domain, and should be greater than or equal to the maximum Doppler frequency shift in the Doppler domain.

[0142] In some embodiments of the present disclosure, the reference signal pattern is determined according to a protocol agreement based on the number of antenna ports and configuration parameters of the reference signal pattern.

[0143] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0144] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0145] It should be noted that the above embodiment corresponds to the embodiment of step S201 in FIG. 2 , and the specific explanation of the embodiment of step S201 in FIG. 2 may be referred to, which will not be repeated here.

[0146] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a reference signal pattern.

[0147] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a preset mapping order and a reference signal pattern.

[0148] In some embodiments of the present disclosure, one or more reference signal sequences corresponding to one or more antenna ports are determined based on a base sequence and a first parameter. Different antenna ports have the same base sequence, but different antenna ports have different values ​​for the first parameter. This implementation ensures that the sequences are mutually orthogonal.

[0149] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0150] It should be noted that the above embodiment corresponds to the embodiment of steps S302 - S304 in FIG3 , and reference may be made to the specific explanation of the embodiment of steps S302 - S304 in FIG3 , which will not be repeated here.

[0151] In the embodiment of the present disclosure, since the base sequences corresponding to different antenna ports are the same, the receiving end device only needs to receive the first parameter of the antenna port to distinguish the reference signals sent by different antenna ports.

[0152] In an embodiment of the present disclosure, a receiving device obtains in advance the reference signal pattern and the first parameter of the antenna port used by the transmitting end to send the reference signal, so that when receiving the reference signal, the receiving device can distinguish the reference signals of different antenna ports and demodulate the reference signal.

[0153] It can be understood that in the implementation of this solution, it is also possible to only receive the reference signal pattern sent by the transmitting device, and distinguish the reference signals sent by different antenna ports by other means. It is also possible to only receive the first parameter sent by the transmitting device, and use other methods to determine the reference signal pattern for the OTFS modulation system. This disclosure is not limited.

[0154] S502: Receive one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern.

[0155] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0156] The specific explanation of the above embodiment can refer to step S401 of the embodiment shown in FIG5 , which will not be repeated here.

[0157] In summary, according to the communication method disclosed in the present invention, the receiving device receives the reference signal pattern and / or the first parameter sent by the transmitting device, and receives one or more reference signals corresponding to one or more antenna ports at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space OTFS modulation system. The communication method can be applied to the MIMO-OTFS system, realizing the function of sending the reference signal in the MIMO-OTFS system.

[0158] Based on the embodiments shown in Figures 5 and / or 6, Figure 7 shows a flow chart of a communication method according to an embodiment of the present disclosure. The method is executed by a receiving device.

[0159] As shown in FIG7 , the method may include the following steps.

[0160] S601: Receive a reference signal pattern and / or a first parameter sent by a transmitting end device.

[0161] In some embodiments of the present disclosure, a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. The guard interval can block the negative effects caused by delay frequency shift or Doppler frequency shift.

[0162] In some embodiments of the present disclosure, the reference signal pattern is determined according to a protocol agreement based on the number of antenna ports and configuration parameters of the reference signal pattern.

[0163] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0164] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0165] It should be noted that the above embodiment corresponds to the embodiment of step S201 in FIG. 2 , and the specific explanation of the embodiment of step S201 in FIG. 2 may be referred to, which will not be repeated here.

[0166] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a reference signal pattern.

[0167] In some embodiments of the present disclosure, one or more reference signal sequences are mapped to reference signal transmission positions according to a preset mapping order and a reference signal pattern.

[0168] In some embodiments of the present disclosure, one or more reference signal sequences corresponding to one or more antenna ports are determined based on a base sequence and a first parameter. Different antenna ports have the same base sequence, but different antenna ports have different values ​​for the first parameter. This implementation ensures that the sequences are mutually orthogonal.

[0169] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0170] It should be noted that the above embodiment corresponds to the embodiment of steps S302 - S304 in FIG3 , and reference may be made to the specific explanation of the embodiment of steps S302 - S304 in FIG3 , which will not be repeated here.

[0171] S602: Receive one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern.

[0172] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0173] The specific explanation of the above embodiment can refer to step S401 of the embodiment shown in FIG5 , which will not be repeated here.

[0174] S603: Determine a first reference signal from one or more reference signals.

[0175] S604: Demodulate the first reference signal.

[0176] In the embodiment of the present disclosure, since the reference signal of each antenna port has the same sending position in the delay-Doppler domain, the receiving device can receive all corresponding reference signals at the reference signal sending position. During demodulation, the receiving device selects the reference signal for demodulation according to actual needs.

[0177] In an embodiment of the present disclosure, the first reference signal is a reference signal selected by the receiving device from one or more received reference signals as required. The first reference signal may be one or more reference signals, and the present disclosure does not limit the number of first reference signals.

[0178] In summary, according to the communication method disclosed in the present invention, the receiving device receives the reference signal pattern and / or the first parameter sent by the transmitting device, and receives one or more reference signals corresponding to one or more antenna ports at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space (OTFS) modulation system to determine the first reference signal from one or more reference signals; the first reference signal is demodulated. This communication method can be applied to the MIMO-OTFS system, realizing the function of sending the reference signal in the MIMO-OTFS system.

[0179] It should be noted that all the above-mentioned different embodiments in the present disclosure can be arbitrarily combined for implementation, and a suitable implementation scheme can be selected according to the specific application scenario, and the present disclosure is not limited thereto.

[0180] Figure 8 illustrates an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 8 , this embodiment involves data / signaling interactions between a transmitting device and a receiving device during the execution of the communication method. Based on the embodiments shown in Figures 1 to 7 , the method includes the following steps.

[0181] S701: The transmitting end device determines a reference signal pattern.

[0182] In some embodiments of the present disclosure, determining a reference signal pattern includes: determining the number of antenna ports; determining configuration parameters for the reference signal pattern; and determining the reference signal pattern based on the number of antenna ports and the configuration parameters in accordance with protocol specifications. This implementation allows the reference signal pattern to be adapted to the number of antenna ports, facilitating reference signal transmission.

[0183] In some embodiments of the present disclosure, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0184] In some embodiments of the present disclosure, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0185] S702: The transmitting end device determines, according to a base sequence and a first parameter, sequences of one or more reference signals corresponding to one or more antenna ports.

[0186] The base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different. This implementation method can ensure that the sequences are orthogonal to each other.

[0187] In some embodiments of the present disclosure, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0188] S703: The transmitting device sends a reference signal pattern and / or a first parameter to the receiving device.

[0189] S704: The transmitting end device maps one or more reference signal sequences to reference signal transmission positions according to the reference signal pattern.

[0190] In some embodiments of the present disclosure, mapping a sequence of one or more reference signals to a reference signal transmission position according to a reference signal pattern includes: mapping a sequence of one or more reference signals to a reference signal transmission position according to a preset mapping order and a reference signal pattern.

[0191] S705 : The transmitting end device sends one or more reference signals corresponding to one or more antenna ports to the receiving end device at a reference signal sending position in the reference signal pattern.

[0192] Among them, the reference signal pattern is used in the orthogonal time-frequency-space (OTFS) modulation system.

[0193] S706: The receiving end device determines a first reference signal from one or more reference signals.

[0194] S707: The receiving device demodulates the first reference signal.

[0195] After receiving many reference signals according to the reference pattern, the receiving end device can decide which reference signals to demodulate according to requirements.

[0196] It should be understood that the above steps S701 to S704 and steps 706 and 707 are optional steps, and one or more or all of the steps may be selectively implemented, and the present disclosure does not limit this. The embodiments of the present disclosure do not limit the order in which the steps are implemented.

[0197] The principles of the above steps S701-S707 are the same as those of the steps described in Figures 1 to 7. For relevant descriptions, please refer to Figures 1 to 7 and will not be repeated here.

[0198] In summary, according to the communication method provided in the embodiments of the present disclosure, a reference signal sending position pattern and a reference signal sending scheme are constructed. The transmitting device sends one or more reference signals corresponding to one or more antenna ports to the receiving device at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space (OTFS) modulation system. The communication method can be applied to the MIMO-OTFS system, realizing the function of sending the reference signal in the MIMO-OTFS system.

[0199] In the embodiments provided above, the methods provided in the embodiments of the present application are described from the perspectives of network devices and user devices, respectively. In order to implement the various functions in the methods provided in the embodiments of the present application, the network devices and user devices may include hardware structures and software modules, and the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures plus software modules. One of the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures plus software modules.

[0200] Corresponding to the communication methods provided in the above-mentioned embodiments, the present disclosure also provides a communication device. Since the communication device provided in the embodiment of the present disclosure corresponds to the communication methods provided in the above-mentioned embodiments, the implementation method of the communication method is also applicable to the communication device provided in this embodiment and will not be described in detail in this embodiment.

[0201] FIG9 is a schematic structural diagram of a communication device 800 provided in an embodiment of the present disclosure.

[0202] As shown in Figure 9, the device 800 may include: a transceiver module 810, used to receive one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system.

[0203] According to the communication device provided by the embodiment of the present disclosure, through the transceiver module, the transmitting device sends one or more reference signals corresponding to one or more antenna ports to the receiving device at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space (OTFS) modulation system. This communication method can be applied to the MIMO-OTFS system, realizes the function of sending the reference signal in the MIMO-OTFS system, and solves the problem that the reference signal cannot be sent in the MIMO-OTFS system.

[0204] In some embodiments, as shown in FIG10 , the apparatus 800 further includes: a determining module 820 configured to determine a reference signal pattern, wherein a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0205] In some embodiments, the determination module 820 is specifically configured to: determine the number of antenna ports; determine configuration parameters of a reference signal pattern; and determine the reference signal pattern based on the number of antenna ports and the configuration parameters and in accordance with protocol agreements.

[0206] In some embodiments, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p, the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0207] In some embodiments, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0208] In some embodiments of the present disclosure, the determination module 820 is further used to: determine the sequence of one or more reference signals corresponding to one or more antenna ports based on the base sequence and the first parameter, wherein the base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different.

[0209] In some embodiments, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0210] In some embodiments, the transceiver module 810 is further configured to send a reference signal pattern and / or a first parameter to a receiving device.

[0211] In some embodiments, as shown in FIG10 , the apparatus 800 further includes: a mapping module 830 configured to map one or more reference signal sequences to reference signal transmission positions according to a reference signal pattern.

[0212] In some embodiments, the mapping module 830 is specifically configured to: map one or more reference signal sequences to reference signal transmission positions according to a preset mapping order and a reference signal pattern.

[0213] In summary, according to the communication device disclosed in the present invention, a reference signal sending position pattern and a reference signal sending scheme are constructed through a transceiver module, a determination module, and a mapping module. Each antenna port has the same reference signal sending position pattern, and one or more reference signal sequences are mapped to the reference signal sending position. By utilizing the orthogonality of the reference signal sequences of different antenna ports, one or more reference signals corresponding to one or more antenna ports are sent at the reference signal sending position in the reference signal pattern. This can be applied to a MIMO-OTFS system, realizes the function of sending a reference signal in the MIMO-OTFS system, and solves the problem that the reference signal cannot be sent in the MIMO-OTFS system.

[0214] FIG11 is a schematic structural diagram of a communication device 900 provided in an embodiment of the present disclosure.

[0215] As shown in Figure 11, the device 900 may include: a transceiver module 910, used to receive one or more reference signals corresponding to one or more antenna ports at a reference signal sending position in a reference signal pattern, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system.

[0216] According to the communication device disclosed in the present invention, through the transceiver module, the receiving device receives one or more reference signals corresponding to one or more antenna ports at the reference signal sending position in the reference signal pattern, wherein the reference signal pattern is used for the orthogonal time-frequency-space (OTFS) modulation system. This communication method can be applied to the MIMO-OTFS system, realizes the function of sending the reference signal in the MIMO-OTFS system, and solves the problem that the reference signal cannot be sent in the MIMO-OTFS system.

[0217] In some embodiments, a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0218] In some embodiments, the reference signal pattern is determined according to a protocol agreement based on the number of antenna ports and configuration parameters of the reference signal pattern.

[0219] In some embodiments, the configuration parameters include at least one of the following: the delay domain index value l of the first symbol transmission position; p , the first symbol is the symbol of the reference signal sequence; the Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , the delay domain symbol length M corresponding to the reference signal sequence p .

[0220] In some embodiments, p Satisfy the first condition: 0<l p -N g <l p <l p +N g <N-1, N represents the number of delay domain OTFS symbols on a scheduling unit; k p Satisfy the second condition: 0<k p -M g <k p <k p +M g <M-1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0221] In some embodiments, the sequence of one or more reference signals corresponding to one or more antenna ports is determined based on a base sequence and a first parameter, wherein the base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different.

[0222] In some embodiments, the first parameter includes any one of the following: an orthogonal cover code OCC; a cyclic shift offset value.

[0223] In some embodiments, the transceiver module 910 is further configured to receive a reference signal pattern and / or a first parameter sent by a transmitting device.

[0224] In some embodiments, a sequence of one or more reference signals is mapped to reference signal transmission positions according to a reference signal pattern.

[0225] In some embodiments, one or more reference signal sequences are mapped to reference signal transmission positions according to a preset mapping order and a reference signal pattern.

[0226] In some embodiments, as shown in FIG12 , the apparatus 900 further includes a determination module 920 and a demodulation module 930 , wherein the determination module 920 is configured to determine a first reference signal from one or more reference signals, and the demodulation module 930 is configured to demodulate the first reference signal.

[0227] According to the communication device disclosed in the present invention, a reference signal transmission position pattern and a reference signal transmission scheme are constructed through a transceiver module, a determination module, and a demodulation module. Each antenna port has the same reference signal transmission position pattern, and one or more reference signal sequences are mapped to the reference signal transmission position. By utilizing the orthogonality of the reference signal sequences of different antenna ports, one or more reference signals corresponding to one or more antenna ports are received at the reference signal transmission position in the reference signal pattern. This device can be applied to a MIMO-OTFS system, realizes the function of sending a reference signal in the MIMO-OTFS system, and solves the problem of not being able to send a reference signal in the MIMO-OTFS system.

[0228] The present disclosure provides a communication system that is applied to a core network. The communication system may be a long term evolution (LTE) system, a fifth generation (5G) mobile communication system, a 5G new radio (NR) system, or other future new mobile communication systems.

[0229] The communication system includes: a transmitting end device and a receiving end device, wherein:

[0230] The transmitting end device is configured to execute the method in any one of the embodiments shown in FIG1 to FIG4 above;

[0231] The receiving end device UE is configured to execute the methods in the embodiments shown in FIG. 5 to FIG. 7 .

[0232] Please refer to Figure 13, which shows a schematic diagram of the structure of a communication device 1000 provided in an embodiment of the present application. Communication device 1000 can be a network device, a user device, a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a processor that supports the user device to implement the above method. This device can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0233] The communication device 1000 may include one or more processors 1001. The processor 1001 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute computer programs, and process computer program data.

[0234] Optionally, the communication device 1000 may further include one or more memories 1002, on which a computer program 1004 may be stored. The processor 1001 executes the computer program 1004 to cause the communication device 1000 to perform the method described in the above method embodiment. Optionally, the memory 1002 may also store data. The communication device 1000 and the memory 1002 may be provided separately or integrated together.

[0235] Optionally, the communication device 1000 may further include a transceiver 1005 and an antenna 1006. The transceiver 1005 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is configured to implement transceiver functions. The transceiver 1005 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is configured to implement a transmitting function.

[0236] Optionally, the communication device 1000 may further include one or more interface circuits 1007. The interface circuit 1007 is configured to receive code instructions and transmit the code instructions to the processor 1001. The processor 1001 executes the code instructions to enable the communication device 1000 to perform the method described in the above method embodiment.

[0237] In one implementation, processor 1001 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0238] In one implementation, processor 1001 may store a computer program 1003. Computer program 1003, when executed on processor 1001, enables communication device 1000 to perform the method described in the above method embodiment. Computer program 1003 may be embedded in processor 1001, in which case processor 1001 may be implemented by hardware.

[0239] In one implementation, the communication device 1000 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0240] The communication device described in the above embodiments may be a network device or a user device, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited to FIG13. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0241] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0242] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0243] (3) ASIC, such as modem;

[0244] (4) Modules that can be embedded in other devices;

[0245] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0246] (6)Others, etc.

[0247] If the communication device can be a chip or a chip system, please refer to the schematic diagram of the chip structure shown in Figure 14. The chip shown in Figure 14 includes a processor 1101 and an interface 1102. The number of processors 1101 can be one or more, and the number of interfaces 1102 can be multiple.

[0248] Optionally, the chip further includes a memory 1103, which is used to store necessary computer programs and data.

[0249] The present application also provides a computer storage medium, which stores computer-executable instructions. After the computer-executable instructions are executed by a processor, the functions of any of the above-mentioned method embodiments can be realized.

[0250] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0251] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0252] Those skilled in the art will understand that the various numerical numbers such as first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, and also indicate the order of precedence.

[0253] In this application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0254] As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and / or device (e.g., a magnetic disk, an optical disk, a memory, a programmable logic device (PLD)) for providing machine instructions and / or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal for providing machine instructions and / or data to a programmable processor.

[0255] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0256] Computer systems may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The client and server relationship arises through computer programs running on the respective computers and having a client-server relationship to each other.

[0257] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not limited herein.

[0258] Furthermore, it should be understood that the various embodiments of the present application may be implemented individually or in combination with other embodiments where the solution permits.

[0259] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0260] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0261] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method is performed by a transmitting end device, and the method includes: At a reference signal transmission position in the reference signal pattern, one or more reference signals corresponding to one or more antenna ports are transmitted, The reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system.

2. The method according to claim 1, characterized in that The method further comprises: determining the reference signal pattern, There is a protection interval between the reference signal sending position and the data sending position in the reference signal pattern.

3. The method according to claim 2, characterized in that The determining the reference signal pattern comprises: Determine the number of antenna ports; Determining configuration parameters of the reference signal pattern; Based on the number of antenna ports and the configuration parameters, the reference signal pattern is determined according to a protocol agreement.

4. The method according to claim 3, characterized in that The configuration parameters include at least one of the following: The delay domain index value l of the first symbol transmission position p , the first symbol is a symbol of a reference signal sequence; The Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , The delay domain symbol length M corresponding to the reference signal sequence p .

5. The method according to claim 4, characterized in that The l p The first condition below is met: 0 < l p -N g < l p < l p +N g <N - 1, where N represents the number of delay domain OTFS symbols on a scheduling unit; The k p The following second condition is met: 0 < k p -M g < k p < k p +M g < M - 1, where M represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: determining, according to the base sequence and the first parameter, a sequence of one or more reference signals corresponding to the one or more antenna ports, The base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different.

7. The method according to claim 6, characterized in that The first parameter includes any one of the following: Orthogonal cover code OCC; Cyclic shift offset value.

8. The method according to claim 6 or 7, characterized in that: The method further comprises: Send the reference signal pattern and / or the first parameter to a receiving end device.

9. The method according to any one of claims 6 to 8, characterized in that The method further comprises: According to the reference signal pattern, the sequence of the one or more reference signals is mapped to the reference signal sending position.

10. The method according to claim 9, characterized in that The mapping, according to the reference signal pattern, the sequence of the one or more reference signals to the reference signal sending position comprises: According to a preset mapping order and in accordance with the reference signal pattern, the sequence of the one or more reference signals is mapped to the reference signal sending position.

11. A communication method, characterized in that: The method is performed by a receiving end device, and the method includes: At a reference signal sending position in a reference signal pattern, one or more reference signals corresponding to one or more antenna ports are received, wherein the reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system.

12. The method according to claim 11, characterized in that There is a guard interval between the reference signal sending position and the data sending position in the reference signal pattern.

13. The method according to claim 12, characterized in that The reference signal pattern is determined according to a protocol agreement based on the number of antenna ports and configuration parameters of the reference signal pattern.

14. The method according to claim 13, characterized in that The configuration parameters include at least one of the following: The delay domain index value l of the first symbol transmission position p , the first symbol is a symbol of a reference signal sequence; The Doppler domain index value k of the first symbol transmission position p ; The number of OTFS symbols corresponding to the delay domain protection interval M g ; The number of OTFS subcarriers N corresponding to the Doppler domain guard interval g ; The Doppler domain subcarrier length N corresponding to the reference signal sequence p , The delay domain symbol length M corresponding to the reference signal sequence p .

15. The method according to claim 14, characterized in that The l p The first condition below is met: 0 < l p -N g < l p < l p +N g <N - 1, where N represents the number of time-delay domain OTFS symbols on a scheduling unit; The k p The following second condition is met: 0 < k p -M g < k p < k p +M g < M - 1, where M represents the number of Doppler-domain OTFS subcarriers on a scheduling unit.

16. The method according to any one of claims 11 to 15, characterized in that The sequence of one or more reference signals corresponding to the one or more antenna ports is determined according to a base sequence and a first parameter, wherein the base sequences corresponding to different antenna ports are the same, and the values ​​of the first parameters corresponding to different antenna ports are different.

17. The method according to claim 16, characterized in that The first parameter includes any one of the following: Orthogonal cover code OCC; Cyclic shift offset value.

18. The method according to claim 16 or 17, characterized in that The method further comprises: Receive the reference signal pattern and / or the first parameter sent by a transmitting end device.

19. The method according to any one of claims 16 to 18, characterized in that The sequence of the one or more reference signals is mapped to the reference signal sending position according to the reference signal pattern.

20. The method according to claim 19, characterized in that The sequence of the one or more reference signals is mapped to the reference signal sending position according to a preset mapping order and in accordance with the reference signal pattern.

21. The method according to any one of claims 11 to 20, characterized in that The method further comprises: determining a first reference signal from the one or more reference signals; The first reference signal is demodulated.

22. A communication device, characterized in that: The device comprises a transceiver module, which is used for: At a reference signal transmission position in the reference signal pattern, one or more reference signals corresponding to one or more antenna ports are transmitted, The reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system.

23. A communication device, characterized in that: The device comprises a transceiver module, which is used for: At a reference signal transmission position in the reference signal pattern, one or more reference signals corresponding to one or more antenna ports are received, The reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system.

24. A communication device, wherein: include: Transceiver; Memory; A processor is connected to the transceiver and the memory, respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer executable instructions on the memory, and can implement the method described in any one of claims 1-21.

25. A computer storage medium, wherein: The computer storage medium stores computer executable instructions; after the computer executable instructions are executed by the processor, the method described in any one of claims 1 to 21 can be implemented.

26. A communication system, characterized in that: include: A transmitting end device and a receiving end device, wherein the transmitting end device is used to execute the method as described in any one of claims 1 to 10; and the receiving end device is used to execute the method as described in any one of claims 11 to 21.

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