Node execution method and node equipment

Abstract

The invention provides a node execution method and node equipment. In one implementation mode, the method executed by a node comprises the following steps: obtaining configuration information related to a first signal, obtaining at least one of first information related to the length of a first signal, second information related to the length L of a plurality of sub-signals included in the first signal, and third information related to the number N of the plurality of sub-signals according to the configuration information, generating the first signal based on at least one of the obtained first information, second information and third information; and sending the first signal.

Description

Technical Field

[0001] The present disclosure relates to a method executed by a node in a communication system and a node device. Background Art

[0002] Considering the development of wireless communication from generation to generation, these technologies are mainly developed for services targeting people, such as voice calls, multimedia services, and data services. With the commercialization of the fifth-generation (5G) communication system, the number of connected devices is expected to grow exponentially. These will be increasingly connected to the communication network. Examples of the Internet of Things can include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to develop in various forms such as augmented reality glasses, virtual reality headsets, and holographic devices. Efforts have been made to develop improved 6G communication systems in order to provide various services by connecting hundreds of billions of devices and things in the sixth-generation (6G) era. For these reasons, 6G communication systems are called super 5G systems.

[0003] The 6G communication system, which is expected to be commercialized around 2030, will have a peak data rate of tera (1,000 gigabits) bps and a radio latency of less than 100 μsec, thus being 50 times the data rate of the 5G communication system and having 1 / 10 of its radio latency.

[0004] In order to achieve such high data rates and ultra-low latency, the implementation of 6G communication systems in terahertz (e.g., 95GHz to 3THz bands) has been considered. It is expected that since the path loss and atmospheric absorption in the terahertz band are more serious than those in the millimeter wave (mmWave) band introduced in 5G, the technology that can ensure the signal transmission distance (i.e., coverage) will become more critical. As the main technology to ensure coverage, it is necessary to develop radio frequency (RF) elements, antennas, new waveforms with better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full dimensional multiple input multiple output (FD-MIMO), array antennas, and multi-antenna transmission technologies such as massive antennas. In addition, new technologies have been discussed to improve signal coverage in the terahertz band, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable intelligence surface (RIS).

[0005] In addition, in order to improve spectrum efficiency and overall network performance, the following technologies have been developed for 6G communication systems: full-duplex technology for enabling uplink and downlink transmissions to use the same frequency resources simultaneously; network technology that utilizes satellites, high-altitude platform stations (HAPS), etc. in an integrated manner; improved network structure to support mobile base stations, etc., and to enable network operation optimization and automation, etc.; dynamic spectrum sharing technology with conflict avoidance based on spectrum usage prediction: using artificial intelligence (AI) in wireless communications to improve overall network operations by utilizing AI from the design stage of developing 6G and internalizing end-to-end AI support functions; and next-generation distributed computing technology that overcomes the computing power limitations of user equipment (UE) through ultra-high performance communication and computing resources achievable on the network (such as mobile edge computing (MEC), cloud, etc.). In addition, attempts are continuing to strengthen connectivity between devices, optimize networks, promote software-based network entities, and increase openness of wireless communications by designing new protocols to be used in 6G communication systems, developing mechanisms for implementing hardware-based security environments and secure use of data, and developing technologies for maintaining privacy.

[0006] It is expected that the research and development of 6G communication systems including hyperconnectivity of person to machine (P2M) and machine to machine (M2M) will bring about the next hyperconnectivity experience. In particular, services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas are expected to be provided through 6G communication systems. In addition, services such as remote surgery, industrial automation, and emergency response for enhanced safety and reliability will be provided through 6G communication systems, making the technology applicable to various fields such as industry, healthcare, automobiles, and home appliances. Summary of the invention

[0007] According to at least one embodiment of the present disclosure, a method performed by a first node in a communication system is provided, comprising: obtaining configuration information related to a first signal, obtaining at least one of first information related to the length of the first signal, second information related to the length L of a sub-signal among multiple sub-signals included in the first signal, and third information related to the number N of the multiple sub-signals according to the configuration information, generating the first signal based on at least one of the obtained first information, second information, and third information; and sending the first signal.

[0008] In one implementation, the configuration information includes at least one of the first information, the second information, and the third information.

[0009] In an implementation manner, the configuration information further includes a fourth parameter related to the sub-signal type.

[0010] In one implementation, the fourth parameter is of Boolean type, indicating a sub-signal with 0 dB or non-0 dB PAPR.

[0011] In one implementation, the first signal further includes a cyclic prefix CP, and the length of the CP is determined based on at least one of the following items: information related to the CP length included in the configuration information, the first information, the third information, and the second information.

[0012] In one implementation, the length of the CP is determined based on the first information, the second information, and the third information.

[0013] In one implementation, the CP is extracted from the rear portion of the first sub-signal in the first signal, or is extracted from the rear portion of a repeated sub-signal.

[0014] In one implementation, generating a first signal includes: generating a sub-signal based on a frequency domain sub-sequence, and obtaining the multiple sub-signals based on the one sub-signal, wherein the length of the frequency domain sub-sequence is one-Nth of the length of the first signal, wherein the frequency domain sub-sequence is a pseudo-random sequence, or the frequency domain sub-sequence is obtained by equally spaced extraction from a pseudo-random sequence corresponding to a sub-signal.

[0015] In one implementation, obtaining the N sub-signals based on the one sub-signal includes: extracting the one sub-signal to obtain an extracted sub-signal with a length of L, and obtaining the N sub-signals based on the extracted sub-signal.

[0016] In one implementation, generating a first signal includes: generating a sub-signal set corresponding to a time unit related to the first signal based on a frequency domain sequence corresponding to the time unit; and obtaining the N sub-signals based on the sub-signal set.

[0017] In one implementation, generating a sub-signal set corresponding to a time unit based on a frequency domain sequence corresponding to a time unit related to a first signal includes: obtaining a second frequency domain sequence based on the frequency domain sequence corresponding to the time unit, wherein the second frequency domain sequence is obtained by setting the frequency domain sequence to zero at equal intervals; and generating the sub-signal set corresponding to the time unit based on the second frequency domain sequence.

[0018] In one implementation, generating a first signal includes: generating the first signal based on a first sequence.

[0019] In one implementation, when the number M of time units occupied by the first signal based on the first information is greater than 1, the first signal is generated based on a first sequence, including: generating a time domain sub-signal set corresponding to one time unit based on the first sequence; and obtaining the first signal corresponding to M time units based on the time domain sub-signal set.

[0020] In one implementation, the first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on at least one of a Gold sequence and an M sequence.

[0021] In one implementation, generating a first signal includes: obtaining values ​​of resource elements corresponding to M time units corresponding to first information based on a second sequence; and obtaining the first signal based on the values ​​of the resource elements.

[0022] In one implementation, generating a first signal includes: obtaining a value of a resource element corresponding to a time unit based on a second sequence; and obtaining the first signal based on the value of the resource element.

[0023] In one implementation, obtaining the first signal based on the value of the resource element includes: obtaining a time domain signal corresponding to the one time unit based on the value of the resource element; and obtaining the first signal based on the time domain signal.

[0024] In one implementation, the CP corresponds to a time domain signal value of M*L0 sampling points starting from the first sampling point of L0 sampling points at the end of the first time unit of the M time units corresponding to the first information, where L0 is one-Mth of the length of the CP.

[0025] In one implementation, the first signal further includes a guard interval, and the length of the guard interval is determined based on the CP length and the lengths of the N sub-signals.

[0026] In one implementation, the first signal is sent on multiple ports, the signals sent on the multiple ports are mapped to the same subcarrier, and the signals sent on the multiple ports have different cyclic shifts in the time domain or have linear phase rotations relative to each other in the frequency domain.

[0027] In one implementation, the first signal is sent on multiple ports, wherein if M is greater than 1, the signals sent on the multiple ports are mapped to different subcarriers.

[0028] In one implementation, the second sequence is mapped to a first subcarrier set among the subcarriers corresponding to the M time units, and the values ​​of resource elements of other subcarriers among the subcarriers corresponding to the M time units are 0.

[0029] In one implementation, the second sequence is mapped to a first subcarrier set among the subcarriers corresponding to the M time units, the first subcarrier set maps a frequency domain sequence, and other subcarriers among the subcarriers corresponding to the M time units are scheduled with zero power reference signals ZP-RS.

[0030] In one implementation, the second sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on at least one of a Gold sequence and an M sequence.

[0031] In one implementation, the configuration information is determined based on at least one of: an expected maximum perception distance, an expected maximum target perception speed, a communication requirement of a node, a number of antenna ports, a number of physical resource elements, or a ratio of a number of physical resource elements.

[0032] In one implementation, the transmission power of the first signal is determined based on at least one of the following items: the number M of time units occupied by the first signal, the number N of sub-signals, the number of layers used to send the first signal, the number of antenna ports, the number of physical resource elements or the ratio of the number of physical resource elements.

[0033] In one implementation, the method further includes sending a sensing request to the second node, the sensing request including information related to at least one of a sensing requirement, a communication requirement, and a collaborative sensing requirement, wherein the configuration information is determined based on the sensing request.

[0034] In one implementation, the information related to the sensing requirement includes information about at least one of the following items: an expected maximum sensing distance, an expected maximum sensing speed, the number of OFDM symbols used for sensing, the number of sub-signals, and the length of the sub-signals.

[0035] In one implementation, the information related to the communication requirement includes a Boolean value indicating the communication requirement of the first node, and when the Boolean value is 0, it indicates that the first node expects to be configured with a 0dB PAPR signal as a sub-signal, for example, a sub-signal based on a linear frequency modulation signal; when the Boolean value is 1, it indicates that the first node expects to be configured with a dual-function signal supporting perception and communication, for example, a sub-signal based on a ZC or PN sequence.

[0036] In one implementation, the information related to the cooperative sensing requirement includes information about at least one of the following: full-duplex capability for supporting sensing of single-transmit single-receive mode, cooperative sensing requirement, and request to be a sender or receiver of a signal in cooperative sensing.

[0037] In one implementation, the method further includes: receiving a second signal, the second signal including an echo signal of the first signal; and performing a perception-related operation based on the second signal.

[0038] In one implementation, performing the perception-related operation includes: performing channel estimation based on the second signal; and obtaining a perception-related result based on the channel estimation result.

[0039] According to at least one embodiment of the present disclosure, a method executed by a second node in a communication system is provided, comprising: obtaining configuration information related to a first signal, the configuration information being related to the length of the first signal, the length L of a sub-signal among multiple sub-signals included in the first signal, and the number N of the multiple sub-signals; and receiving the first signal based on the configuration information.

[0040] In one implementation, the first signal also includes a cyclic prefix CP, and the length of the CP is determined based on at least one of the following items: information related to the CP length included in the configuration information, the length of the first signal, the number N of the multiple sub-signals, and the length L of the sub-signal.

[0041] In one implementation, the method further includes: performing a perception-related operation based on the received first signal.

[0042] In one implementation, performing the perception-related operation includes: performing channel estimation based on the received first signal; and obtaining a perception-related result based on the channel estimation result.

[0043] According to at least one embodiment of the present disclosure, a node device in a communication system is provided, including: a transceiver configured to send and / or receive signals; and a controller configured to perform control so that the node executes the method described in the embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0045] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0046] Figure 2 An example base station according to an embodiment of the present disclosure is shown;

[0047] Figure 3 An example user device according to an embodiment of the present disclosure is shown;

[0048] Figure 4 A schematic diagram showing a method executed by a node according to at least one embodiment of the present disclosure is shown;

[0049] FIG. 5A to FIG. 5C A schematic diagram of the structure of a signal sent or received by a node according to at least one embodiment of the present disclosure is shown.

[0050] Figure 6 and Figure 7 Flowcharts of different methods for generating a physical signal by a node according to at least one embodiment of the present disclosure are respectively shown;

[0051] Figure 8 A schematic diagram of the structure of a physical signal including two sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown;

[0052] Fig. 9 An example of frequency domain resource mapping of physical signals of 8 ports is shown;

[0053] Fig.10 A schematic diagram of the structure of a physical signal including four sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown;

[0054] Fig.11 An example of frequency domain resource mapping of physical signals of 8 ports is shown;

[0055] Figures 12A to 12C A schematic diagram of the structure of a physical signal including three sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown;

[0056] Fig.13 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped on one OFDM symbol in the time domain according to an embodiment of the present disclosure is shown;

[0057] Figures 14A to 14B A schematic diagram of the structure of a physical signal including four sub-signals transmitted on two OFDM symbols according to at least one embodiment of the present disclosure is shown;

[0058] Fig.15 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped onto two OFDM symbols in the time domain according to an embodiment of the present disclosure is shown;

[0059] Figures 16A to 16C A schematic diagram of the structure of a physical signal including three sub-signals transmitted on two OFDM symbols according to at least one embodiment of the present disclosure is shown;

[0060] Fig.17 A schematic diagram of the structure of a physical signal including six sub-signals transmitted on three OFDM symbols according to at least one embodiment of the present disclosure is shown;

[0061] Fig.18 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped onto three OFDM symbols in the time domain according to an embodiment of the present disclosure is shown;

[0062] Fig.19 A simplified block diagram of the hardware structure of a node device according to at least one embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0063] Before carrying out the following specific embodiments, it may be advantageous to set forth the definitions of certain words and phrases used throughout the patent document. The term "connection" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "send", "receive" and "communicate" and their derivatives include both direct and indirect communication. The terms "include" and "include" and their derivatives mean unrestricted inclusion. The term "or" is compatible, meaning and / or. The phrase "associated with" and its derivatives mean including, included, interconnected with it, including, included, connected to or connected with it, coupled to or coupled with it, can communicate with it, collaborate with it, interweave, juxtapose, approach, be bound to or bound with it, have, have the property of, have to ... or have a relationship with ... etc. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in a hardware manner or in a combination of hardware and software and / or firmware. The functionality associated with any particular controller, whether local or remote, may be centralized or distributed. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and only A, only B, only C. Likewise, the term "set" means one or more. Thus, a set of items may be a single item or a set of two or more items.

[0064] Moreover, various functions as described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, categories, instances, related data, or a portion thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical, or other communication links that convey instantaneous electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and rewritten later, such as rewritable optical discs or erasable memory devices.

[0065] Definitions for certain other words and phrases are provided throughout this patent document. Those of skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0066] The figures and various embodiments used to describe the principles of the present disclosure are included herein for illustration only and should not be construed in any way as limiting the scope of the present disclosure. In addition, those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged wireless communication system.

[0067] The following Figures 1 to 3 Various embodiments of the present disclosure are described as being implemented in a wireless communication system. Figures 1 to 3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0068] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0069] like Figure 1As shown, the wireless network includes a base station (next generation nodeB, gNB or gNodeB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0070] The gNB 102 provides wireless broadband access to a network 130 for a plurality of first user equipments (UEs) within a coverage area 120 of the gNB 102. The plurality of first UEs include a UE 111 that may be located at a small business (SB); a UE 112 that may be located at an enterprise (E); a UE 113 that may be located at a WiFi hot spot (HS); a UE 114 that may be located at a first residence (R1); a UE 115 that may be located at a second residence (R2); and a UE 116 that may be a mobile device (M) such as a cellular phone, a wireless laptop, a wireless personal digital assistant (PDA), etc. The gNB 103 provides wireless broadband access to the network 130 for a plurality of second UEs within a coverage area 125 of the gNB 103. The plurality of second UEs include UE 115 and UE 116 and subscriber stations (SS, e.g., UEs) 117, 118, and 119. In some embodiments, one or more of gNBs 101 103 may communicate with each other and UE 111 116 using existing wireless communication technologies, and one or more of UE 111 119 may communicate directly with each other (e.g., UE 117 119) using other existing or proposed wireless communication technologies.

[0071] Depending on the type of network, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmit point (TP), a transmit-receive point (TRP), an enhanced (or "evolved") base station (eNodeB or eNB), a 5G base station (gNB), a macro cell, a femto cell, a wireless fidelity (WiFi) access point (AP), or other wireless capable devices. A base station may provide wireless access according to one or more wireless communication protocols, such as 3GPP 5G new radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE A), high speed packet access (HSPA), WiFi 802.11a / b / g / n / ac, etc. For convenience, various names of base station type devices and functions are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, the term "user equipment" (UE) may refer to any component such as a mobile station (MS), a subscriber station (SS), a remote terminal, a wireless terminal, a reception point, or a user device, etc. For convenience, various names of user equipment type devices and functions are used interchangeably in this patent document to refer to a remote wireless device that wirelessly accesses a BS regardless of whether the UE is a mobile device (such as a mobile phone or a smart phone) or a remote wireless device that is generally considered to be a fixed device (such as a desktop computer or a vending machine).

[0072] Dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the wireless environment associated with natural and artificial obstacles.

[0073] As described in more detail below, one or more of the UEs 111 119 include circuitry, programming, or a combination thereof. In certain embodiments, one or more of the gNBs 101 103 include circuitry, programming, or a combination thereof.

[0074] although Figure 1 An example of a wireless network is shown, but Figure 1Various changes may be made. For example, wireless network 100 may include any number of gNBs and any number of UEs in any suitable arrangement. Moreover, gNB 101 may communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks such as an external telephone network or other types of data networks.

[0075] Figure 2 An example base station according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs appear in a variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0076] like Figure 2 As shown in FIG. 1 , gNB 102 includes multiple antennas 200a 200n, multiple radio frequency (RF) transceivers 201a 201n, a transmit (TX) processing circuit 203, and a receive (RX) processing circuit 204. gNB 102 also includes a controller / processor 205, a memory 206, and a backhaul or network interface (IF) 207.

[0077] The RF transceiver 201a 201n receives incoming RF signals from the antenna 200a 200n, such as signals sent by a UE in the network 100. The RF transceiver 201a 201n down-converts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to the RX processing circuit 204, which generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 204 sends the processed baseband signal to the controller / processor 205 for further processing.

[0078] The TX processing circuit 203 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 205. The TX processing circuit 203 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 201a 201n receives the outgoing processed baseband or IF signal from the TX processing circuit 203 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 201a 201n.

[0079] Controller / processor 205 may include one or more processors or other processing devices that control the overall operation of gNB 102. For example, controller / processor 205 may control the reception of forward channel signals and the transmission of reverse channel signals by RF transceivers 201a 201n, RX processing circuitry 204, and TX processing circuitry 203 in accordance with well-known principles. Controller / processor 205 may also support additional functionality, such as more advanced wireless communication functionality.

[0080] For example, the controller / processor 205 may support beamforming or directional routing operations, in which outgoing signals from multiple antennas 200a-200n are weighted differently to effectively steer the outgoing signals in a desired direction. Any of a variety of other functions may be supported in the gNB 102 by the controller / processor 205.

[0081] The controller / processor 205 is also capable of executing programs and other processes, such as an operating system (OS), located in the memory 206. The controller / processor 205 can move data into or out of the memory 206 as required by the executing process.

[0082] The controller / processor 205 is also connected to a backhaul or network interface 207. The backhaul or network interface 207 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 207 may support communication over any appropriate (one or more) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G, LTE, or LTE A), the interface 207 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 207 may allow the gNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet). The interface 207 includes any appropriate structure that supports communication over a wired or wireless connection such as an Ethernet or RF transceiver.

[0083] Memory 206 is connected to controller / processor 205. A portion of memory 206 may include random access memory (RAM), and another portion of memory 206 may include flash memory or other read-only memory (ROM).

[0084] although Figure 2 An example of gNB 102 is shown, but the Figure 2 For example, gNB 102 may include any number of Figure 2 As a specific example, the access point may include multiple interfaces 207, and the controller / processor 205 may support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of TX processing circuitry 203 and a single instance of RX processing circuitry 204, the gNB 102 may include multiple instances of each (such as one for each RF transceiver). For example, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0085] Figure 3 An example user device according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111 115 and 117 119 may have the same or similar configurations. However, UEs may appear in a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0086] like Figure 3 As shown in FIG. 1 , UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a TX processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller or processor 307, an input / output (I / O) interface (IF) 308, an input device 309, a touch screen display 310, and a memory 311. The memory 311 includes an OS 312 and one or more applications 313.

[0087] RF transceiver 302 receives incoming RF signals transmitted by a gNB of network 100 from antenna 301. RF transceiver 302 downconverts the incoming RF signals to generate an IF or baseband signal. The IF or baseband signal is sent to RX processing circuitry 305, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 305 sends the processed baseband signal to speaker 306 (such as for voice data) or processor 307 for further processing (such as for web browsing data).

[0088] The TX processing circuit 303 receives analog or digital voice data from the microphone 304 or other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 307. The TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives the outgoing processed baseband or IF signal from the TX processing circuit 303 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 301.

[0089] The processor 307 may include one or more processors or other processing devices and executes the OS 312 stored in the memory 311 to control the overall operation of the UE 116. For example, the processor 307 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 302, the RX processing circuit 305, and the TX processing circuit 303 according to well-known principles. In some embodiments, the processor 307 includes at least one microprocessor or microcontroller.

[0090] The processor 307 is also capable of executing other processes and programs located in the memory 311, such as a process for CSI (Channel State Information) reporting on the uplink channel. The processor 307 can move data into or out of the memory 311 as needed to execute the process. In some embodiments, the processor 307 is configured to execute the application 313 based on the OS 312 or in response to a signal received from the gNB or operator. The processor 307 is also coupled to the I / O interface 308, which provides the UE 116 with the ability to connect to other devices such as laptops and portable computers. The I / O interface 308 is the communication path between these accessories and the processor 307.

[0091] Processor 307 is also connected to touch screen display 310. A user of UE 116 may use touch screen display 310 to enter data into UE 116. Touch screen display 310 may be a liquid crystal display, light emitting diode display, or other display capable of rendering text and / or at least limited graphics, such as from a website.

[0092] The memory 311 is connected to the processor 307. A portion of the memory 311 may include RAM, and another portion of the memory 311 may include flash memory or other ROM.

[0093] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in the embodiment may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 307 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0094] Exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0095] The text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it is obvious to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be changed without departing from the scope of the present disclosure.

[0096] The demand for wireless data in production activities of human society is gradually increasing, and spectrum is gradually becoming a scarce resource. How to improve the spectrum utilization rate of communication systems has always been a hot issue for practitioners. At present, the low-frequency resources of wireless communication are relatively crowded, and the working frequency band of the communication system is gradually developing towards higher frequencies. Therefore, it will inevitably conflict with the radar system that originally worked in the high-frequency band. Whether it is background theoretical knowledge or hardware structure, cellular communication systems and radar systems have very high similarities. Therefore, the integration of cellular communication systems and radar systems can be used as a potential means to improve spectrum efficiency. At the same time, communication systems and radar systems may also complement each other in performance and achieve a mutually beneficial and win-win effect. Therefore, communication perception integration (hereinafter referred to as synaesthesia) has become one of the candidate technologies for 6G as a hot research direction in the field of communication. The core of the synaesthesia system is to use the same set of hardware equipment to realize the perception function of the surrounding environment at the cost of as little resource overhead as possible while ensuring basic communication functions. The perceived content includes the distance, direction, speed and even type of objects in the surrounding environment. Different from the technology of locating access terminals in traditional communication systems, synaesthesia technology can also perceive a variety of information of non-access objects, which greatly enhances the ability of the communication system to dynamically adjust the working status (scheduling, beam management, early warning of access terminals, etc.) according to the surrounding environment.

[0097] At present, the most widely used communication systems are systems based on the 3GPP protocol, such as 4G communication systems such as LTE and LTE-A, and 5G communication systems such as NR. The signal waveforms used by these communication systems are all based on OFDM modulation waveforms. Considering forward compatibility, for example, OFDM communication signals can be used as perception signals. Specifically, the perception signal can be a physical signal and / or physical channel that can be used for perception purposes. For example, when the perception node is a base station, the perception signal can be a downlink reference signal or a downlink physical channel, etc.; when the perception node is a terminal, the perception signal can be an uplink reference signal or an uplink physical channel, etc. The perception signal sent by the perception node is reflected by the target reflector and then received by the perception node in the form of an echo. By processing the echo signal, the distance, speed, direction and other perception information of the target object can be perceived.

[0098] The existing communication perception integrated node is expected to realize the perception function, for example, at least one of target detection, target distance estimation, and target speed estimation, wherein, in order to realize the estimation of target speed, it is necessary to estimate the Doppler of the target, and a possible way to realize the target Doppler estimation is to accumulate signals in the time domain, for example, send multiple perception signals and receive their corresponding echoes as received signals, wherein an observation window is set on the corresponding symbol or sampling point, one observation window corresponds to a received signal, and multiple received signals are respectively channel estimated to obtain multiple channel estimation results. Under a frame structure design, obtaining a received signal for perception requires occupying one or more OFDM symbols, for example, the number of orthogonal frequency division multiplexing (OFDM) symbols required to obtain a received signal for perception is Q, then the number of kQ OFDM symbols required to obtain k received signals is k, that is, the required OFDM symbols are proportional to the number of required received signals. In the design of the synaesthesia system, it is expected that the perception function can use fewer resources to achieve better perception performance.

[0099] To this end, an embodiment of the present application provides a new physical signal design method and a corresponding receiver behavior, wherein a perception node sends a first signal, wherein the first signal includes multiple sub-physical signals (hereinafter also interchangeably referred to as sub-signals). For example, the multiple sub-physical signals included in the first signal include at least one first sub-signal, and, optionally, one or more sub-physical signals related to the first sub-signal. Wherein, multiple sub-physical signals are sent continuously in the time domain, which can realize the perception function required by the node or network while reducing resource overhead. For example, by sending multiple sub-physical signals that are continuous in the time domain on one OFDM symbol or sending N (N>M) physical signals that are continuous in the time domain on M (M>1) OFDM symbols, the required resource overhead can be reduced while realizing the perception function.

[0100] It should be understood that in the description of the present disclosure, "sub-physical signal" and "sub-signal" are merely examples of names and may also be described as other names, such as auxiliary signal, secondary signal, signal, physical signal, etc.

[0101] This embodiment provides a method performed by a node in a wireless communication system, such as Figure 4 As shown, including:

[0102] Step 1: Obtain configuration information related to the first signal, and based on the configuration information, obtain first information related to the length of the first signal and / or second information related to the length of the sub-physical signal, and / or third information related to the number of sub-physical signals.

[0103] In one implementation, at least one of the first information, the second information, and the third information can be obtained by looking up a table or the like according to the parameters included in the configuration information. For example, a correspondence between a first format parameter related to the first signal and at least one of the first information, the second information, and the third information is pre-defined in a table, and the configuration information includes a first format parameter, and at least one of the first information, the second information, and the third information can be obtained through the first format parameter. For example, an example of the correspondence between the first format parameter and the first information is that the first format parameter is 0, which corresponds to a length of 1 OFDM symbol, and the first format parameter is 1, which corresponds to a length of 2 OFDM symbols. The first information can be obtained based on the first format parameter through the above correspondence.

[0104] In one implementation, the configuration information may include at least one of first information, second information, and third information. The first information related to the length of the physical signal may include the time length or the number of time units occupied by the physical signal, for example, the time length given in milliseconds, or the number of time slots occupied by the physical signal, or the number of OFDM symbols occupied by the physical signal, or the number of sampling points occupied by the physical signal; the second information related to the length of the sub-physical signal may include whether the length of the sub-physical signal adopts a preset or default configuration, or, optionally, the length of the sub-physical signal; the sub-physical signal length may be the number of sampling points in the OFDM symbol occupied by the sub-physical signal, or the number of time slots occupied by the sub-physical signal, or the number of OFDM symbols occupied by the sub-physical signal; the third information related to the number of sub-physical signals may include the number N of sub-physical signals or repetitions of the sub-physical signal; or, optionally, the above three pieces of information may be obtained based on the same configuration information, or may be obtained based on different configuration information, for example, the first information is obtained from the first configuration, and the second information and / or the third information is obtained from the second configuration.

[0105] Optionally, based on the above configuration information, a fourth parameter related to the sub-signal type can be obtained. A possible example is that the configuration information contains an information element (IE) "sub-signal type", where the content of the parameter is a Boolean value. Different values ​​of the fourth parameter correspond to different signal types of sub-signals in the perception signal. The physical meaning of the parameter value of 1 is that a sub-signal with a 0dB PAPR is generated, for example, a sub-signal based on a linear frequency modulation signal is generated; the physical meaning of the parameter value of 0 is that a sub-signal based on a ZC sequence or a PN sequence is generated, and the PAPR of the signal may not be 0dB, and vice versa. The beneficial effect of determining the sub-signal type according to the fourth parameter is that the type of signal can be adjusted according to the configuration information to meet the perception and / or communication requirements in the perception process. For example, a signal with a low PAPR can meet a specific perception task, while a signal with a high PAPR can meet a specific communication task.

[0106] Step 2: Obtain the number of OFDM symbols M that can be occupied by the physical signal, the number of sub-physical signals N, and, optionally, parameters related to the length of the sub-physical signals based on at least one of the first information, the second information, and the third information, and determine the method for generating the physical signal; wherein the length of the physical signal may be an integer multiple or non-integer multiple of the OFDM symbol length. When the length of the physical signal is an integer multiple or non-integer multiple of the OFDM symbol length, optionally, the number of OFDM symbols corresponding to the first information related to the length of the physical signal may be rounded, for example, rounded up or rounded down.

[0107] Step 3: generating the physical signal;

[0108] Step 4: Send or receive the signal at at least one configured time unit.

[0109] In one implementation, the above steps 2 and 3 can be combined into: generating the physical signal based on the number M of OFDM symbols occupied by the physical signal obtained according to the configuration information, the number N of sub-physical signals, and, optionally, parameters related to the length of the sub-physical signal.

[0110] In one implementation, the physical signal may further include a cyclic prefix (in the following description, for clarity of description and convenience in distinguishing from the CP of the OFDM symbol, the cyclic prefix of the physical signal is also referred to as an equivalent cyclic prefix or a perceptual cyclic prefix CP (referred to as perceptual CP for short), and the length of the perceptual CP may be obtained based on the configuration information, including at least one of the following: the configuration information includes perceptual CP length information, such as time length or number of sampling points; or, the length of the perceptual CP is determined based on at least one of the first information, the second information, and the third information; or, the length of the perceptual CP is jointly determined based on the first information and the number N of time-domain continuous sub-signals included in the first signal. In one implementation, the physical signal length information in the first information is M OFDM symbols, and the length of the perceptual CP may be the sum of the normal or extended CP lengths of the M OFDM symbols. In an example, the physical signal length information indicated by the first information may be 4384 sampling points, the number of sub-signals is 3, and the number of sampling points of a single sub-signal is 1000, then the length of the perceptual CP may be 4384-(1000*3)=1384 sampling points.

[0111] In an example, the length of the perceived CP is determined based on the first information, the second information, and the third information. The length of the perceived CP (taking the time length as an example) may be: in, is the time length of the first signal determined according to the first information, is the number of repetitions of the sub-signal determined according to the third information, It is the length of the sub-signal determined according to the second information. The beneficial effect of determining the CP length according to the signal length / sub-signal length / number of sub-signal repetitions is that the generated perception signal will not exceed the boundary of the OFDM symbol corresponding to the given perception signal length. At the same time, the actual repeated sub-signal in the generated sub-signal repetition structure is consistent with the expected sub-signal, avoiding the problem of sub-signal mismatch. In one example, the method for extracting the perception CP may be to take it out from the back of the first sub-signal. The beneficial effect of this method of extracting the CP is that it can save cache and signal preparation time, and is more suitable for perception scenarios where the perception signal occupies multiple OFDM symbols. In this case, the transmitter can generate the CP after generating a single sub-signal, that is, the generation process of the perception signal is: generate a single sub-signal, generate the CP, and repeat the single sub-signal. The corresponding formula for generating a perception signal with a CP is

[0113]

[0114] in, is the time domain expression of a single sub-signal, T cRepresents the time interval between the sample points of the time domain baseband signal, t start,SE Represents the starting time of sending the perception signal, is the time length of the first signal determined according to the first information, is the number of repetitions of the sub-signal determined according to the third information, is the length of the sub-signal determined according to the second information. In one example, the perception CP can be extracted from the rear of the repeated sub-physical signal. The beneficial effect of this method of extracting CP is that it has lower computational complexity and is more suitable for the perception scenario where the perception signal occupies a single OFDM symbol. In this case, when generating the perception signal, the transmitter needs to generate the CP only after generating the repeated sub-physical signal. That is, the generation process of the perception signal is: generate a single sub-signal, repeat the single sub-signal, and generate the CP. The corresponding formula for generating the perception signal with CP is

[0115]

[0116] in, for The time domain expression of the sub-signal, T c Represents the time interval between the sample points of the time domain baseband signal, t start,SE Represents the starting time of sending the perception signal, is the time length of the first signal determined according to the first information, is the number of repetitions of the sub-signal determined according to the third information, is the length of the sub-signal determined according to the second information.

[0117] Among them, the nodes in the wireless communication system include but are not limited to base stations and terminals. The following takes the node as a base station and / or a terminal as an example to further describe the content included in the above configuration information. In addition, for the convenience of description and to avoid redundancy, in the following description, the first information related to the length of the physical signal included in the configuration information is described as the number M of OFDM symbols occupied by the physical signal. It can be understood that such a description is only exemplary and not restrictive. The principle and essence of the technical solution described in the present disclosure can also be applied to the first information related to the length of the physical signal included in the configuration information as the number of other time units (for example, the number of sampling points, the number of time slots, etc.) or information related to the time length occupied by the physical signal described in any other granularity.

[0118] When the node in the wireless communication system is a base station, the configuration information may include one or more of the following items: the number of OFDM symbols M, the number of sub-physical signals N, and, optionally, whether the sub-physical signal length (length refers to the number of sampling points) adopts a preset or default configuration, whether the length of the perceived cyclic prefix adopts a preset or default configuration, the length of the perceived cyclic prefix, the length of each sub-physical signal, and the length of the guard time interval. Among them, the perceived cyclic prefix refers to the overall cyclic prefix of the M OFDM symbols. Different from the signal structure in which the front of each OFDM symbol includes a cyclic prefix and the signals sent on different OFDM symbols are separated from each other by cyclic prefixes, the physical signal sent by the node on M OFDM symbols according to at least one embodiment of the present disclosure includes the perceived cyclic prefix at the front of the M OFDM symbols and a plurality of continuous sub-physical signals, and optionally, a guard interval may also be included between the perceived cyclic prefix and the plurality of continuous sub-signals.

[0119] When the node in the wireless communication system is a terminal, it can be configured through the base station or through other terminals. The above configuration may include one or more of the number of OFDM symbols M, the number of sub-physical signals N, and whether the sub-physical signal length (length refers to the number of sampling points) adopts a preset or default configuration, whether the length of the perceived cyclic prefix adopts a preset or default configuration, whether the physical signal can be used for data demodulation and / or whether a symbol contained in the physical signal can be used for data demodulation, the length of the perceived cyclic prefix, the length of each sub-physical signal, and the length of the protection time interval.

[0120] The following describes the physical meaning of the above configuration information, as well as the characteristics of the physical signal (hereinafter also interchangeably referred to as the physical reference signal) defined or generated based on the above configuration information and its time domain / frequency domain generation method.

[0121] Based on the above configuration information, this embodiment defines a physical signal that can achieve perception and / or target parameter estimation with lower resource overhead. The meaning of the physical signal includes, but is not limited to, a dedicated physical signal for communication perception integration; a physical reference signal that can be used for communication perception integration, such as a demodulation reference signal, including a demodulation reference signal for an uplink / downlink shared channel, a demodulation reference signal for an uplink / downlink control channel, a demodulation reference signal for a broadcast channel, etc.; a sounding reference signal (Sounding Reference Signal, SRS); a channel state information reference signal (ChannelState Information Reference Signal, CSI-RS), etc. Preferably, the physical signal can be a demodulation reference signal, and further, the physical signal can be generated by a pseudo-random sequence.

[0122] One form of the physical signal is that it is mapped on M OFDM symbols in the time domain and includes N sub-physical signals, for example, Figure 5C As shown; and, optionally, also includes a perceptual cyclic prefix, such as Figure 5A For the convenience of description, the N sub-physical signals are respectively referred to as "sub-physical signal 1", "sub-physical signal 2", ..., "sub-physical signal N". The number of sampling points for perceiving the cyclic prefix is ​​represented as N ECP , the length of each sub-physical signal is represented by x CPS The sub-physical signals can be identical or different. The length of the perceptual cyclic prefix is ​​determined by M, N and x. CPS One or more of the determinations.

[0123] Another form of the physical signal is that it is mapped on M OFDM symbols in the time domain, including N sub-physical signals, a guard interval, and a perceptual cyclic prefix, such as Figure 5B As shown, the N sub-physical signals are respectively referred to as “sub-physical signal 1”, “sub-physical signal 2”, …, and “sub-physical signal N”. The number of sampling points for perceiving the cyclic prefix is ​​N. ECP , the length of the guard interval N GT , the length of each sub-physical signal is x CPS The sub-physical signals may be identical or different, and the length of the perceptual cyclic prefix is ​​determined by M and N.

[0124] The beneficial effect of this physical reference signal format design is that by sending more sub-physical signals that can be used to perform perception-related operations (for example, including but not limited to perception, target detection, target parameter estimation, etc.) in a time unit, the maximum speed of the target that can be detected by the system is increased, and the resource overhead of the system is saved. Specifically, the maximum unambiguous speed of the system is increased without increasing the resource overhead, or even reducing the system resource overhead. Among them, the lengths of each sub-physical signal can be equal, and each sub-physical signal can be the same or different. For example, each sub-physical signal can be exactly the same, that is, it has exactly the same expression in the time domain. For another example, each sub-physical signal can also be completely different, but the frequency domain signal corresponding to any sub-physical signal has a linear phase rotation relationship with the frequency domain signal corresponding to any other sub-physical signal, that is, the frequency domain signal corresponding to one sub-physical signal is linearly phase rotated relative to the frequency domain signal corresponding to any other sub-physical signal. The beneficial effect of this design is that each sub-physical signal can be used as a cyclic prefix of the subsequent sub-physical signal, that is, sub-physical signal d can be used as a cyclic prefix of sub-physical signal d+1, thereby realizing the functions of target detection and / or target parameter estimation required by the perception system. Among them, the beneficial effect of designing a perceptual cyclic prefix and, optionally, designing a guard interval is to ensure that at least one (for example, in this embodiment, the first) symbol among the M OFDM symbols occupied by the above-mentioned physical signal can be used for the communication needs of the communication system, for example, to perform channel estimation and / or signal demodulation and other functions for auxiliary communication. It can be seen that the physical signal according to at least one embodiment of the present disclosure can meet the communication needs of the node, for example, it can assist the communication between nodes or nodes; in addition, the physical signal designed in this way can also use fewer resources to better realize the perception function of the node or communication system.

[0125] In one implementation, the frequency domain expressions of any two sub-physical signals may satisfy a relationship of mutual linear phase rotation, and the linear phase rotation may not specify the size of the linear phase rotation value. When the linear phase rotation value of the frequency domain expression of a certain sub-physical signal (denoted as sub-physical signal A) relative to the frequency domain expression of any other sub-physical signal (sub-physical signal B) is an integer, the time domain expressions of sub-physical signal A and sub-physical signal B are the same. When the linear phase rotation value is a non-integer, the time domain expressions of sub-physical signal A and sub-physical signal B are different. Therefore, when the physical signal contains multiple sub-physical signals, the time domain expressions of any two sub-physical signals may be the same or different.

[0126] Thus, according to at least one embodiment of the present disclosure, multiple sub-physical signals in the physical signal can be the same sub-physical signal in the time domain, that is, they can be repetitions of sub-physical signals. In addition, according to at least one embodiment of the present disclosure, multiple sub-physical signals in the physical signal can also be different sub-physical signals in the time domain. Any sub-physical signal between different sub-physical signals can be used as a cyclic prefix of a subsequent sub-physical signal, thereby enabling a single transmission of the physical signal to generate multiple observation windows for perceiving related operations. In addition, by adding a perceptual cyclic prefix before multiple sub-physical signals that are continuous in the time domain, the perceptual cyclic prefix and the multiple sub-physical signals (or optionally, the protection interval between the perceptual cyclic prefix and the first sub-physical signal) together occupy M consecutive OFDM symbols, so that at least the first OFDM symbol among the M OFDM symbols can be used as a normal communication function, such as channel estimation, received signal demodulation and other operations.

[0127] In a possible implementation, perception node A obtains configuration information on one or more time units, wherein the configuration information may be configured by high-level signaling or by other nodes. Perception node A generates a physical reference signal related to the configuration information based on the configuration information, recorded as signal B, and sends signal B on one or more time units related to the configuration information, and receives signal C, wherein signal C includes all or part of the echo signal corresponding to signal B. Perception node A performs perception-related operations based on signal C, such as perception, target detection, or target parameter estimation.

[0128] In a possible implementation, node A obtains configuration information on one or more time units, wherein the configuration information may be configured by high-level signaling or by other nodes. Node A generates a physical reference signal related to the configuration information based on the configuration information, which is recorded as signal B, and sends signal B on one or more time units related to the configuration information. Sensing node C obtains configuration information on one or more time units, and receives signals on the one or more time units, which is recorded as signal D, wherein signal D includes signals related to all or part of signal B, for example, signal D includes all or part of signal B that directly reaches sensing node C after being sent from node A, or signal D includes all or part of signal B that reaches sensing node C after being reflected or scattered by target E after being sent from node A. Sensing node C performs communication or perception-related operations based on signal D, such as channel estimation, received signal demodulation, environment perception, target detection, parameter estimation, etc.

[0129] The number of OFDM symbols M included in the above configuration information may be an integer greater than or equal to 1, for example, M may be 1, 2, 3, etc.; the number of sub-signals N in the configuration information may be a positive integer greater than 1, for example, N may be 2, 3, 4, etc. In one implementation, N may take the value kM, where k is an integer and k≥1. For example, when M=2, N may be 2, 4, 6, etc.; when M=3, N may be 3, 6, 9, etc. The beneficial effect of such a design is that more symbols in the above reference signal can be used not only for perception, but also for communication-related functions, for example, for auxiliary data demodulation, channel estimation, etc.

[0130] There are several ways to generate the above physical signals:

[0131] 1. With respect to the values ​​of M and N in the configuration information, the physical signal may be generated in the time domain. The flowchart of the method for generating the physical signal is as follows: Figure 6 shown.

[0132] like Figure 6 As shown in (a) of FIG. 1 , the method for generating a physical signal may include the following steps:

[0133] First, a sequence is generated, a single or multiple sub-physical signals are generated based on the sequence, a perceptual cyclic prefix is ​​generated based on the single or multiple sub-physical signals, and a physical signal is generated based on the multiple sub-physical signals and the perceptual cyclic prefix; wherein, there are multiple ways to generate a single or multiple sub-physical signals based on the sequence:

[0134] Mode 1: directly obtaining a single sub-physical signal based on a sequence, and obtaining multiple sub-physical signals based on a single sub-physical signal; or, obtaining a sub-physical signal set based on a sequence (for example, in the case of M=1 and N=4, obtaining the third and fourth sub-physical signals), and obtaining multiple sub-physical signals based on the sub-physical signal set (for example, the first, second, third, and fourth sub-physical signals);

[0135] Method 2: After performing IFFT transformation on the sequence, multiple sub-physical signals are obtained based on the result of IFFT transformation;

[0136] Method three: After performing IFFT transformation on the sequence, a single sub-physical signal is obtained based on the result of the IFFT transformation (for example, when M=1 and N=4, the 4th sub-physical signal is obtained), and multiple sub-physical signals are obtained based on the single sub-physical signal (for example, the 1st, 2nd, 3rd, and 4th sub-physical signals).

[0137] like Figure 6 As shown in (b) in the figure, the method for generating a physical signal may include the following steps:

[0138] First, a sequence is generated, a single or multiple sub-physical signals are generated based on the sequence, a perceptual cyclic prefix and a guard interval are generated based on the single or multiple sub-physical signals, and the physical signal is generated based on the multiple sub-physical signals, the perceptual cyclic prefix, and the guard interval;

[0139] 2. For some values ​​of M and N in the configuration information, the physical signal can be generated in the frequency domain.

[0140] A flow chart of a method for generating the physical signal is shown in Figure 7 shown.

[0141] When N / M (ratio of N to M) is an integer, such as Figure 7 As shown in (a), the method includes the following steps: firstly, generating a sequence, obtaining frequency domain resource mapping results of M OFDM symbols based on the sequence, and obtaining time domain resource mapping results of M OFDM symbols based on the frequency domain resource mapping results of the M OFDM symbols, that is, the physical signal;

[0142] When N / M is an integer, such as Figure 7 As shown in (b) of the figure, the method includes the following steps: firstly, a sequence is generated, a frequency domain resource mapping result of a single OFDM symbol is obtained based on the sequence, and a time domain resource mapping result of M OFDM symbols is obtained based on the frequency domain resource mapping result of the single OFDM symbol, that is, the physical signal; (In the present disclosure, the frequency domain resource mapping of the single OFDM symbol takes the last symbol of the M OFDM symbols as an example, but correspondingly, it is also feasible to select any one of the M OFDM symbols for frequency domain resource mapping.)

[0143] When N / M is an integer, such as Figure 7 As shown in (c), the method includes the following steps: firstly, generating a sequence, obtaining a frequency domain resource mapping result of a single OFDM symbol based on the sequence, obtaining a time domain resource mapping result of a single OFDM symbol based on the frequency domain resource mapping result of the single OFDM symbol, and obtaining a time domain resource mapping result of M OFDM symbols based on the time domain resource mapping result of the single OFDM symbol, that is, the physical signal;

[0144] It should be noted that when obtaining the frequency domain resource mapping results of a single or multiple OFDM symbols based on a sequence, the frequency domain subsequences corresponding to the single or multiple OFDM symbols can be first obtained based on the sequence, and then the frequency domain resource mapping results of the single or multiple OFDM symbols can be obtained based on the frequency domain subsequences. For example, the frequency domain subsequences can be obtained by extracting from the sequence, and then the frequency domain subsequences are mapped to the resource grid to obtain the frequency domain resource mapping of the single or multiple OFDM symbols.

[0145] The difference between the generation of physical signals in the frequency domain and the time domain is mainly reflected in that when the physical signal is generated in the time domain, it can be generated in units of one sub-physical signal or one sub-physical signal set, wherein a sub-physical signal set contains at least two adjacent sub-physical signals; when the physical signal is generated in the frequency domain, it can be generated in units of one OFDM symbol or multiple OFDM symbols. Different generation methods are suitable for different scenarios and perception requirements. For example, when the physical signal is generated in the time domain, the length of the sub-physical signal is not limited by the number of OFDM symbol sampling points, which is more suitable for scenarios with lower communication requirements. At this time, the perception system can use relatively more resources, support more flexible frame structure design, and meet diverse perception needs. At the same time, the signal processing requirements for the perception receiver are relatively small, which can save the system's computing resources. When the physical signal is generated in the frequency domain, the length of the sub-physical signal is relatively fixed, that is, it needs to have a certain specific relationship with the number of OFDM symbol sampling points. It is more suitable for scenarios with more communication needs and fewer resources available to the perception system. At this time, the perception signal generated in the frequency domain can be used for demodulation of downlink data while realizing the perception function, and play a role in assisting communication while perceiving.

[0146] The sequence used to generate the physical signal can be a pseudo-random sequence or a low peak-to-average power ratio sequence (for example, a Zedoff-Chu sequence, etc.). The beneficial effect of such a design is that the peak-to-average power ratio (PAPR) of the time domain signal of the physical signal is low, thereby improving the efficiency of electronic components such as power amplifiers. The physical signal generated in the above manner can not only realize the perception function but also assist in communication, for example, it can assume the role of a demodulation reference signal in all or part of the communication.

[0147] In one implementation, when M=1, the physical signal is mapped onto one OFDM symbol in the time domain, and is composed of N sub-physical signals and a perceptual cyclic prefix, wherein the N sub-physical signals may be the same or different, and the length of the perceptual cyclic prefix may be greater than or equal to 1 and less than the number of sampling points of an OFDM symbol containing a CP. In particular, the length of the perceptual cyclic prefix may be the cyclic prefix length of an OFDM symbol. For example, when the length of an OFDM symbol is 4096 sampling points, the length of the perceptual cyclic prefix may be 288 sampling points.

[0148] In one implementation, under any M and N parameter configuration, a preset or default configuration may be set for the sub-physical signal length. For example, under certain values ​​of M and N, the preset or default configuration of the sub-physical signal length may be one-Nth of M OFDM symbols without a cyclic prefix (CP). Since the maximum sensing distance that a sensing node can support is related to the length of the sub-physical signal, the advantage of the above sub-physical signal length configuration is that the maximum possible sensing distance can be obtained within a given time resource. For example, when the number of sampling points of an OFDM symbol without a cyclic prefix (CP) is 4096 points, the preset or default configuration of the sub-physical signal length under the M=1, N=2 configuration may be 2048 points, the preset or default configuration of the sub-physical signal length under the M=1, N=3 configuration may be 1024 points, the preset or default configuration of the sub-physical signal length under the M=2, N=2 configuration may be 4096 points, and the preset or default configuration of the sub-physical signal length under the M=2, N=4 configuration may be 2048 points. It should be noted that when N is an odd number, the sub-physical signal length under the preset or default configuration of the above sub-physical signal length setting is a non-integer. In this configuration, the sampling point is not used as the boundary of the sub-physical signal. For example, when M=1 and N=3, the preset or default configuration of the sub-physical signal length can be 4096 / 3 points. The physical meaning of this setting can be understood as that the analog waveform corresponding to the sub-physical signal corresponding to a certain length of 4096 / 3 sampling points is repeated three times, and then the sub-physical signal repeated three times is sampled at 4096 points, that is, a physical signal without CP is obtained. At this time, the sampling point is not the boundary of the sub-physical signal. Therefore, the physical signal without CP seen in the digital domain where the sampling point is located (corresponding to the continuous waveform in the analog domain) is not a simple repetition of a certain sub-physical signal three times. It should be noted that the physical signal generation method described in the present invention does not sample the analog signal, and the description of the above physical meaning is only to assist in understanding the physical reference signal format when N is an odd number. The beneficial effect of such a setting is that the value of N is not limited to odd or even, so a more flexible reference signal format design can be supported. At the same time, when the reference signal is used for data demodulation, additional data processing at the receiver end can be avoided.

[0149] Some embodiments of the present disclosure will be described below in conjunction with examples. It should be understood that the numbering of the embodiments below is only for distinguishing one embodiment from another, and is not intended to imply or imply the order or importance of the embodiments.

[0150] Embodiment 1: M=1, N=2

[0151] Figure 8 A schematic structural diagram of a physical signal including two sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown.

[0152] Let's take M=1, N=2 as an example ( Figure 8 The possible generation method of the above physical signal in the time domain is given in the format shown in the figure. According to the configuration information M=1, the reference signal occupies one OFDM symbol. Assume that the sub-physical signal length in the configuration information adopts the preset or default configuration, and the number of sampling points of one OFDM symbol is N. FFT , then correspondingly, the number of sampling points of a sub-physical signal is The number of sampling points for perceiving the cyclic prefix is ​​N ECP , and N ECP =N CP , that is, the length of the perceived cyclic prefix is ​​equal to the CP length of an OFDM symbol. First, perform step 1 to generate a single sub-physical signal. One possible implementation is to assume that the frequency domain sequence allocated to the symbol is X[k], k=0,1,2,...,N FFT -1, where N FFT It is also the number of points in the FFT / IFFT / DFT / IDFT in the OFDM system. First, take out the data corresponding to the even subcarriers (i.e., the 0th, 2nd, 4th, ... subcarriers) in the above frequency domain sequence to generate a new sequence As a frequency domain subsequence, that is, X′[0]=X[0], X′[1]=X[2], X′[2]=X[4],... Perform IFFT / IDFT of the number of points, we get Point time domain signal At this time, x′[n] is a single sub-physical signal. Step 2 is executed to repeat the sub-physical signal. One possible implementation is that according to the configuration information N=2, the sub-physical signal in the reference signal is repeated twice. Therefore, the repeated sub-physical signal in the time domain (the sub-physical signal 1 and the sub-physical signal 2 are arranged in sequence) is expressed as The length is N FFT Execute step 3 to add a perceptual cyclic prefix. One possible implementation method is to take the following sampling points with the same number of perceptual cyclic prefix points from x[n] according to the configuration information as the perceptual cyclic prefix, that is, x CP [n] = x[n+N FFT -N CP ],n=0,1,2,...,N CP -1. The above-mentioned perceptual cyclic prefix and repeated sub-physical signals are converted into Figure 8 The sequential connection shown generates a physical reference signal with parameters M=1 and N=2.

[0153] The following is a possible way to generate the above physical signal in the frequency domain. Execute step 1 to generate the frequency domain signal corresponding to a single OFDM symbol according to the configuration information. A possible implementation method is to assume that the frequency domain sequence allocated to the symbol is X[k], k = 0, 1, 2, ..., N FFT -1, retain the data corresponding to the even subcarriers (i.e., the 0th, 2nd, 4th, ... subcarriers) in the above frequency domain sequence, set the data corresponding to the odd subcarriers to zero, and generate a new sequence Execute step 2, perform IFFT / IDFT on the frequency domain signal to generate a time domain signal corresponding to a single OFDM symbol. One possible implementation is to perform N FFT IFFT / IDFT of the number of points, get N FFT The time domain signal x′[n] of the number of points, n=0,1,2,...,N FFT -1, at this time x′[n] is the physical signal corresponding to an OFDM symbol, that is, a signal including sub-physical signal 1 and sub-physical signal 2. Execute step 4 to add a perceptual cyclic prefix. A possible implementation is to take the following sampling points with the same number of perceptual cyclic prefix points from x[n] according to the configuration information as the perceptual cyclic prefix, that is, x CP [n] = x[n+N FFT -N CP ],n=0,1,2,...,N CP -1. The above-mentioned perceptual cyclic prefix and repeated sub-physical signals are converted into Figure 8 The sequential connections shown generate a reference signal with parameters M=1 and N=2.

[0154] The physical signal can be a multi-port signal. The physical signals of each port are orthogonal and can be mapped to the same subcarrier but with different cyclic shifts. When performing resource mapping in the frequency domain, the physical signal is only mapped to the subcarrier with an even number. Specifically, assuming that the maximum number of ports supported by the system is N port , the number of physical signal ports mapped to the same subcarrier but with different cyclic shifts is N 1 , then N 1 =N port , according to the configuration information M=1, the reference signal occupies one OFDM symbol.

[0155] Below is N port =8 as an example, the method of generating physical signals is described in detail. Taking the generation of physical signals from the frequency domain as an example, Fig. 9 An example of frequency domain resource mapping of an 8-port physical signal is given (hereinafter referred to as method 1).

[0156] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (RE) (k, l) according to the following method: p superior

[0157]

[0158] Among them, p represents the serial number of the port, (k,l) p The number of the resource element defined by the kth subcarrier and the lth OFDM symbol in the resource grid of port p. A possible way to take the value of the physical parameter in formula 1 is shown in Table 1. It should be noted that Table 1 is only a possible way to take the value of the physical parameter in formula 1. The above parameters can also be defined by formulas, for example, The definition of can be:

[0159]

[0160] Among them, mod(k′,2)=0 means that k′ modulo 2 is 0, that is, k′ is an even number. For another example, The calculation formula can be Optionally, when the number of ports actually used by the system is less than 8, for example, the number of ports actually used by the system is N 2 ,but The calculation formula can be The beneficial effect of the above formula is to counteract the loss of the maximum detectable distance of the system caused by configuring multiple ports, thereby increasing the maximum detectable distance of the system. Indicates the sequence number of the OFDM symbol where the first baseband signal is located, The specific value of can be a preset value, or given by control information, or given by MAC layer signaling or high-level signaling. And the following conditions are met: (1) The resource element is within the RB (Resource Block) allocated to the physical signal transmission; (2) The reference point of k is the 0th subcarrier of the RB with the smallest sequence number within the system bandwidth; (3) The reference point of l is defined relative to the starting OFDM symbol of the time slot.

[0161] Table 1 Values ​​of some physical parameters

[0162]

[0163] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0164]

[0165]

[0166] Among them, N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP represents the length of the perceptual cyclic prefix, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0167]

[0168] In the above method, the physical meaning of Formula 1 is that the sequence r(n) used to generate the physical signal is mapped on the even subcarriers on the defined time-domain OFDM symbol, while the odd subcarriers are left blank, that is, mapped with 0.

[0169] In a possible way of generating a physical signal, a zero-power reference signal (ZP-RS) may be scheduled on some subcarriers, and a sequence r(n) for generating a physical signal may be mapped on even subcarriers on a defined time-domain OFDM symbol. For example, Formula 1 in the above method may be replaced by

[0170]

[0171] Among them, a possible value mode of each parameter is shown in Table 1, and a zero-power reference signal is scheduled on the odd subcarriers in the resource element corresponding to Formula 1a. Among them, the zero-power reference signal can be scheduled by high-level signaling or physical layer signaling, such as MAC signaling, RRC signaling, or DCI / UCI. For a zero-power reference signal scheduled by a certain signaling, a node (e.g., a terminal) shall assume that the corresponding resource element is not used for other physical channels and / or physical signals containing data (e.g., physical downlink shared channels), that is, the node (e.g., a terminal) shall assume that the power on the corresponding resource element is 0. The node (e.g., a terminal) performs the same measurement and / or reception on physical channels and / or physical channels other than the above-mentioned other physical channels and / or physical signals (e.g., physical downlink shared channels), regardless of whether they conflict with the zero-power reference signal. Optionally, the resource element corresponding to the above-mentioned zero-power reference signal can be used to transmit a zero-power reference signal configured for other nodes (e.g., terminals).

[0172] A possible way to generate a physical signal (hereinafter referred to as method 2) is to generate the physical signal from the time domain, first obtain a sequence, and generate a physical signal based on the sequence, and map it to the time domain resource. The node should assume that the sequence r(i) is defined as:

[0173]

[0174] Where, the pseudo-random sequence c(n), n = 0, 1, ..., 2x CPS +1 can be a Gold sequence, or generated based on a Gold sequence, or an M sequence, or generated based on an M sequence. In one implementation, the pseudo-random sequence can be defined as

[0175] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0176] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0177] x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2

[0178] Among them, x CPS is the length of a single physical sub-signal. In this example, if the physical sub-signal uses a preset length configuration, then x CPS =2048,N C =1600, the first M sequence x 1 (n) is defined as x 1 (0)=1,x 1 (n) = 0, n = 1, 2, ..., 30. The second M sequence x 2 (n) generator uses The specific situation depends on the application of the above sequence. The time domain continuous signal of the lth OFDM symbol on antenna port p is It can be expressed as

[0179]

[0180]

[0181] Among them, at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of the OFDM symbol. In this embodiment, the length of the perceptual cyclic prefix may also be set to be equal to N CP , T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0182]

[0183] Embodiment 2: M=1, N=4

[0184] Fig.10 A schematic diagram of the structure of a physical signal including four sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown. It should be noted that the value of N can be an integer greater than 4. When the value of N is 6, 8, 10 or a greater even number, the generation method described below is also followed to adjust the parameters related to N accordingly.

[0185] The following takes M=1, N=4 as an example (the signal format is as follows Fig.10 As shown in FIG. 1 , a possible generation method of the above physical signal in the time domain is given. A possible generation method in the time domain is similar to the generation method of the reference signal corresponding to M=1, N=2, so only the differences are described below. In step 1, the main difference is to take out the frequency domain sequence X[k], k=0,1,2,...,N FFT The data corresponding to the subcarriers corresponding to N=4 (i.e., the 0th, 4th, 8th, ... subcarriers) in -1 generates a new sequence That is, X′[0]=X[0], X′[1]=X[4], X′[2]=X[8], .... Execute on X′[k] IFFT / IDFT of the number of points, we get Point time domain signal At this time, x′[n] is a single sub-physical signal. In step 2, the main difference is that the single sub-physical signal is repeated four times. In addition, the reference signal corresponding to M=1, N=4 can be generated from the time domain in the same process as the time domain generation method of the reference signal corresponding to M=1, N=2 in the above text.

[0186] A possible method for generating the above physical signal in the frequency domain is given below. A possible frequency domain generation method is similar to the frequency domain generation method of the reference signal corresponding to M=1, N=2, so only the differences are described below. In step 1, retain the frequency domain sequence X[k], k=0,1,2,...,N FFT -1 and the corresponding data on the subcarriers corresponding to N=4 (i.e., the 0th, 4th, 8th, ... subcarriers), and set the corresponding data on the remaining subcarriers to zero to generate a new sequence In addition, the reference signal corresponding to M=1, N=4 can be generated from the frequency domain according to the same process as the frequency domain generation method of the reference signal corresponding to M=1, N=2 in the above text.

[0187] The physical signal can be a multi-port signal. The physical signals of each port are orthogonal and can be mapped to the same subcarrier but with different cyclic shifts. When performing resource mapping in the frequency domain, the physical signal is only mapped to the subcarriers with sequence numbers 0 and multiples of 4. Specifically, assuming that the maximum number of ports supported by the system is N port , the number of physical signal ports mapped to the same subcarrier but with different cyclic shifts is N 3 , then N 3 =N port , according to the configuration information M=1, the reference signal occupies one OFDM symbol.

[0188] Below is N port =8 as an example, the method of generating physical signals is described in detail. Taking the generation of physical signals from the frequency domain as an example, Fig.11 An example of frequency domain resource mapping of an 8-port physical signal is given. Since the frequency domain signal generation method in this method is similar to the process of method one, the following only describes the differences between the frequency domain signal generation process and method one. The process of generating time domain resources from frequency domain resources in this method is the same as the corresponding method in method one, so it will not be repeated.

[0189] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following p superior

[0190]

[0191] Among them, p represents the serial number of the port, (k,l) pIndicates the sequence number of the resource element defined by the kth subcarrier and the lth OFDM symbol in the resource grid of port p. A possible way of taking the values ​​of the physical parameters in Formula 2 is shown in Table 2. It should be noted that Table 2 is only a possible way of taking the values ​​of the physical parameters in Formula 2, and the above parameters can also be defined by formulas.

[0192] Table 2 Values ​​of some physical parameters

[0193]

[0194] A possible way to generate a physical signal is to define a zero-power reference signal (zero-power RS), and map a sequence r(n) for generating a physical signal on a subcarrier located at a non-negative integer multiple of 4 (e.g., subcarriers 0, 4, 6, 12, etc.) on a defined time-domain OFDM symbol. For example, replace Formula 2 in the above method with

[0195]

[0196] Among them, a possible value mode of each parameter is shown in Table 2, and the zero power reference signal is scheduled on the subcarrier corresponding to k′=1, 2, 3 in the resource element corresponding to Formula 2a. Among them, the scheduling of the zero power reference signal and the multiplexing of related resource elements have been explained in the previous text and will not be repeated here.

[0197] A possible way to generate a physical signal is to generate the physical signal from the time domain. First, a sequence is obtained, and a physical signal is generated according to the sequence and mapped to the time domain resource. The node shall assume that the sequence r(i) is defined as:

[0198]

[0199] Where, the pseudo-random sequence c(n), n = 0, 1, ..., 2x CPS +1 can be defined as

[0200] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0201] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0202] x 2 (n+31)=(x2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2

[0203] Among them, x CPS is the length of a single sub-physical signal. In this example, x CPS =1024, N C =1600, the first M sequence x 1 (n) is defined as x 1 (0) = 1, x 1 (n) = 0, n = 1, 2, ..., 30. The second M sequence x 2 (n) generator uses The specific situation depends on the application of the above sequence. The time domain continuous signal of the lth OFDM symbol on antenna port p is It can be expressed as

[0204]

[0205]

[0206] Among them, at the start time of the time slot t = 0, N CP represents the length of the perceptual cyclic prefix, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0207]

[0208] Embodiment 3: M=1, N=2v+1, where v is a positive integer

[0209] In a possible implementation, the value of N may be an odd number. When the value of M is 1 and the value of N is an odd number, the first signal may be generated in the time domain or in the frequency domain. The following description takes N=3 as an example. Figures 12A to 12C A schematic structural diagram of a physical signal including three sub-signals transmitted on one OFDM symbol according to at least one embodiment of the present disclosure is shown.

[0210] The following takes M=1, N=3 as an example, and gives the generation methods based on the case where the sub-physical signal length adopts the preset or default configuration and the case where the sub-physical signal length does not adopt the preset or default configuration. When the sub-physical signal length adopts the preset or default configuration, preferably, the reference signal is generated from the frequency domain, and the signal format is as follows Fig. 12A As shown. According to the configuration information M=1, the reference signal occupies one OFDM symbol. Assume that the sub-physical signal length in the configuration information adopts the preset or default configuration, and the number of sampling points of one OFDM symbol is N FFT , then correspondingly, the number of sampling points of a sub-physical signal is The number of sampling points for perceiving the cyclic prefix is ​​N CP Execute step 1 to generate a frequency domain signal corresponding to a single OFDM symbol according to the configuration information. One possible implementation is to assume that the frequency domain sequence allocated to the symbol is X[k], k=0,1,2,...,N FFT -1, retain the data corresponding to the subcarriers corresponding to N=3 in the above frequency domain sequence (i.e., the 0th, 3rd, 6th, ... subcarriers), set the data corresponding to the remaining subcarriers to zero, and generate a new sequence Execute step 2, perform IFFT / IDFT on the frequency domain signal to generate a time domain signal corresponding to a single OFDM symbol. One possible implementation is to perform N FFT IFFT / IDFT of the number of points, and get N FFT The time domain signal x[n] of the number of points, n=0,1,2,...,N FFT -1, in which case x′[n] is the physical signal corresponding to an OFDM symbol, that is, a signal including sub-physical signal 1, sub-physical signal 2, and sub-physical signal 3. Since the number of occupied OFDM symbols in the configuration information is not greater than 1, optional step 3 is not performed. Step 4 is performed to add a perceptual cyclic prefix. A possible implementation is to take the following sampling points with the same number of perceptual cyclic prefix points from x[n] according to the configuration information as the perceptual cyclic prefix, that is, x CP [n] = x[n+N FFT -N CP ],n=0,1,2,...,N CP -1. The above-mentioned perceptual cyclic prefix and repeated sub-physical signals are connected in the order shown in the figure, so as to generate a reference signal with parameters of M=1 and N=3.

[0211] When the sub-physical signal length does not adopt the preset or default configuration, preferably, the reference signal is generated from the time domain, and the signal format is as follows: Fig. 12B and 12CAs shown in the figure, since the sub-physical signal length does not adopt a preset or default configuration, additional signaling is required to define it, that is, "the length of each sub-physical signal is x" in the configuration information. CPS ", preferably, x CPS is an integer, and In this example, assume that N FFT =4096, N=3, then x CPS ≤1365. Fig. 12B The signal format shown uses the same Fig. 12A The same length of the perceptual cyclic prefix in the signal format shown, that is, the length of the perceptual cyclic prefix adopts a preset or default configuration, for example, x CP =288. Since x CP +3x CPS =4383, which is less than the length of an OFDM symbol with CP (4384 points), so a guard interval of 1 sampling point length is required. First, perform step 1 to generate a single sub-physical signal. One possible implementation is to first generate x CP-M The parent signal of a single sub-physical signal of a point, x CP-M Greater than or equal to x CPS , for example, 2048 points or 4096 points. Then randomly extract x from the mother signal CPS Points are used as a single sub-physical signal. The generation method of 2048-point and 4096-point time domain signals has been described above and will not be repeated here. Execute step 2 to repeat the single sub-physical signal in the time domain to obtain the repeated physical signal x[n]. A possible implementation method has also been described above and will not be repeated here. Execute step 3 to add a perceptual cyclic prefix. A possible implementation method is to take the subsequent sampling points with the same number of points as the perceptual cyclic prefix from x[n] according to the configuration information as the perceptual cyclic prefix, that is, x CP [n] = x[n+N FFT -N CP ],n=0,1,2,...,N CP -1. The above-mentioned perceptual cyclic prefix, guard interval, and x[n] are connected in the order shown in the figure, so as to generate a reference signal with parameters of M=1 and N=3.

[0212] Fig. 12C The signal format shown does not have a guard interval, but increases the length of the perceptual cyclic prefix. In this example, the length of the perceptual cyclic prefix becomes 289 points. Fig. 12C The corresponding physical signal and Fig. 12BThe generation method of the corresponding physical signal is basically the same, and only the differences are described below. First, execute steps 1 and 2 to obtain the repeated physical signal x[n]. Execute step 3 to add the perceived cyclic prefix. One possible implementation method is to take the following points from x[n] according to the configuration information and the default perceived cyclic prefix points. The same sampling points (288 in this case) as the first half of the perceptual cyclic prefix, i.e. right Repeat and take the first N CP Point, that is The above perceived cyclic prefix x CP [n] and x[n] are connected in the order shown in the figure, thereby generating a reference signal with parameters M=1, N=3.

[0213] The physical signal can be a multi-port signal. The physical signals of each port are orthogonal and can be mapped to the same subcarrier but with different cyclic shifts. When performing resource mapping in the frequency domain, the physical signal is only mapped to the subcarriers with sequence numbers 0 and multiples of 3. Specifically, assuming that the maximum number of ports supported by the system is N port , the number of physical signal ports mapped to the same subcarrier but with different cyclic shifts is N 5 , then N 5 =N port , according to the configuration information M=1, the reference signal occupies one OFDM symbol.

[0214] Below is N port =8 as an example, the method of generating physical signals is described in detail. Taking the generation of physical signals from the frequency domain as an example, Fig.13 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped on an OFDM symbol in the time domain according to an embodiment of the present disclosure is shown. Since the frequency domain signal generation method in this method is similar to the process of method one, only the differences from method one in the process of frequency domain signal generation are described below. The process of generating time domain resources from frequency domain resources in this method is the same as the corresponding method in method one, so it is not repeated here.

[0215] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following p superior

[0216]

[0217] Among them, p represents the serial number of the port, (k,l) pIndicates the sequence number of the resource element defined by the kth subcarrier and the lth OFDM symbol in the resource grid of port p. A possible way of taking the values ​​of the physical parameters in Formula 3 is shown in Table 3. It should be noted that Table 3 is only a possible way of taking the values ​​of the physical parameters in Formula 3, and the above parameters can also be defined by formulas.

[0218] Table 3 Values ​​of some physical parameters

[0219]

[0220] A possible way to generate a physical signal is to define a zero-power reference signal (zero-power RS), and map a sequence r(n) for generating a physical signal on a subcarrier located at a non-negative integer multiple of 3 (e.g., subcarriers 0, 3, 6, 9, etc.) on a defined time-domain OFDM symbol. For example, replace Formula 3 in the above method with

[0221]

[0222] Among them, a possible value mode of each parameter is shown in Table 2, and a zero-power reference signal is scheduled on the subcarrier corresponding to k′=1,2 in the resource element corresponding to Formula 3a. Among them, the scheduling of the zero-power reference signal and the multiplexing of related resource elements have been explained in the previous text and will not be repeated here.

[0223] A possible way to generate a physical signal (hereinafter referred to as method 3) is to generate the physical signal from the time domain. First, a sequence is obtained, and a physical signal is generated according to the sequence and mapped to the time domain resource. The node shall assume that the sequence r(i) is defined as:

[0224]

[0225] Where, the pseudo-random sequence c(n), n = 0, 1, ..., 2x CPS +1 can be defined as

[0226] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0227] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0228] x 2(n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2

[0229] Among them, x CPS is the length of a single sub-physical signal. In this example, x CPS =1024, N C =1600, the first M sequence x 1 (n) is defined as x 1 (0) = 1, x 1 (n) = 0, n = 1, 2, ..., 30. The second M sequence x 2 (n) generator uses It depends on the application of the above sequence. The time domain continuous signal of the kth OFDM symbol on antenna port p is It can be expressed as

[0230]

[0231] Among them, Fig. 12B Corresponding One possible definition of is:

[0232]

[0233] or, with Fig. 12C Corresponding One possible definition of is:

[0234]

[0235] Among them, at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0236]

[0237] Embodiment 4: M=2, N=4

[0238] Figures 14A to 14BA schematic diagram of the structure of a physical signal including four sub-signals transmitted on two OFDM symbols according to at least one embodiment of the present disclosure is shown. It should be noted that the value of N can be an integer greater than 4. When the value of N is 6, 8, 10 or a greater even number, the generation method described below is also followed to adjust the parameters related to N accordingly.

[0239] The following takes M=2, N=4 as an example (the physical signal format is as follows Fig. 12A As shown), a possible generation method of the above physical signal in the time domain is given. According to the configuration information M=2, the reference signal occupies two OFDM symbols. Assume that the sub-physical signal length in the configuration information adopts the preset or default configuration, and the number of sampling points of an OFDM symbol is N FFT , then correspondingly, the number of sampling points of a sub-physical signal is The number of sampling points for perceiving the cyclic prefix is ​​N ECP , and N ECP =2N CP , that is, the length of the perceived cyclic prefix is ​​equal to the CP length of two OFDM symbols. First, execute step one to generate a single sub-physical signal. A possible implementation method is the same as the generation method of the sub-physical signal corresponding to M=1, N=2 in the above text, which will not be repeated here. Execute step two to repeat the sub-physical signal. A possible implementation method is that according to the configuration information N=4, the sub-physical signal in the reference signal is repeated four times. Therefore, the repeated sub-physical signal in the time domain (sub-physical signal 1, sub-physical signal 2, sub-physical signal 3 and sub-physical signal 4 are arranged in order) obtains x[n], with a length of 2N. FFT Execute step 3 to add a perceptual cyclic prefix. One possible implementation is to extract the following sampling points with the same number of perceptual cyclic prefix points from the time domain signal corresponding to the first OFDM symbol in x[n] according to the configuration information as the perceptual cyclic prefix, that is, x CP [n] = x[n+N FFT -N CP ],n=0,1,2,...,N CP -1. Alternatively, in this example, when executing step 3, another possible implementation method is as follows: Fig. 14B As shown, count forward one regular OFDM symbol CP length (288 points in this example) from the last sampling point of the first OFDM symbol with CP as the first sampling point, recorded as sampling point A, and count backward N from sampling point A. ECP The point is marked as sampling point B, and the data between sampling point A and sampling point B is taken as the perceptual cyclic prefix in this example. The perceptual cyclic prefix and the repeated sub-physical signal are connected in the order shown in the figure, and a reference signal with parameters M=2 and N=4 is generated.

[0240] The following is a possible way to generate the above physical signal in the frequency domain. Execute steps 1 and 2 to generate a frequency domain signal corresponding to a single OFDM symbol according to the configuration information, and perform IFFT / IDFT on the frequency domain signal to generate a time domain signal x′[n] corresponding to a single OFDM symbol, where n=0,1,2,...,N FFT -1, a possible implementation method is the same as the generation method of the sub-physical signal corresponding to M=1, N=2 in the above text, which will not be repeated here. Since the number of occupied OFDM symbols in the configuration information is 2, which is greater than 1, step three is executed. A possible implementation method is to repeat x′[n] twice to obtain the repeated physical signal x[n]. Execute step four to add a perceived cyclic prefix. A possible implementation method is the same as the method of adding a perceived cyclic prefix generated in the time domain, which will not be repeated here. The above-mentioned perceived cyclic prefix and the repeated sub-physical signal are connected in the order shown in the figure, and a reference signal with parameters M=2, N=4 is generated.

[0241] The physical signal can be a multi-port signal. The physical signals of each port are orthogonal and can be mapped to different subcarriers or to the same subcarrier but with different cyclic shifts. Specifically, assuming that the maximum number of ports supported by the system is N port , the number of ports of physical signals mapped to different subcarriers is N 1 , the number of physical signal ports mapped to the same subcarrier but with different cyclic shifts is N 2 , then N 1 and N 2 Satisfy N 1 ×N 2 =N port According to the configuration information M=2, the reference signal occupies two OFDM symbols.

[0242] Below is N port =8 as an example, the method of generating physical signals is described in detail. Taking the generation of physical signals from the frequency domain as an example, Fig.15 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped onto two OFDM symbols in the time domain according to an embodiment of the present disclosure is shown.

[0243] A possible way to generate a physical signal is to perform frequency domain resource mapping on M OFDM symbols according to a sequence, and then perform time domain resource mapping on M OFDM symbols according to the frequency domain resource mapping results on the M OFDM symbols.

[0244] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the followingp superior

[0245]

[0246] Among them, p represents the serial number of the port, (k,l) p Represents the sequence number of the resource element defined by the k-th subcarrier and the l-th OFDM symbol in the resource grid of port p. and A possible value of is shown in Table 4, where N CP Indicates the number of sampling points of the CP corresponding to an OFDM symbol, Indicates the number of sampling points of a CP-free OFDM symbol, which is also the number of FFT / IFFT points. The beneficial effect is that when the signal shown in formula 4 is transformed into the time domain, the end of the symbol corresponding to l'=0 and the CP of the symbol corresponding to l'=1 together form the same time domain signal as the symbol corresponding to l'=1. That is, the generation of sub-physical signals 1 and 2 and the addition of the perceptual cyclic prefix are realized at the same time. It should be noted that Table 4 is only one possible way to take the value of the physical parameters, and the above parameters can also be defined by formulas.

[0247] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0248]

[0249]

[0250] in, l′=0,1,N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0251]

[0252] Table 4 Values ​​of some physical parameters

[0253]

[0254] A possible way to generate a physical signal is to perform frequency domain resource mapping on a single OFDM symbol according to a sequence, and then perform time domain resource mapping on multiple OFDM symbols according to the frequency domain resource mapping result on the single OFDM symbol.

[0255] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following p superior

[0256]

[0257] Among them, p represents the serial number of the port, (k,l) p Represents the sequence number of the resource element defined by the k-th subcarrier and the l-th OFDM symbol in the resource grid of port p. A possible value of is shown in Table 4a.

[0258] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0259]

[0260]

[0261] Among them, N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0262]

[0263] Table 4a Values ​​of some physical parameters

[0264]

[0265] A possible way to generate a physical signal is to perform frequency domain resource mapping on a single OFDM symbol according to a sequence, then perform time domain resource mapping on a single OFDM symbol according to the result of the frequency domain resource mapping on the single OFDM symbol, and then perform time domain resource mapping on multiple OFDM symbols according to the result of the time domain resource mapping on the single OFDM symbol.

[0266] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following w superior

[0267]

[0268] Among them, p represents the serial number of the port, (k,l) p Represents the sequence number of the resource element defined by the k-th subcarrier and the l-th OFDM symbol in the resource grid of port p. A possible value of is shown in Table 4a.

[0269] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0270]

[0271]

[0272]

[0273] Among them, N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol. It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0274]

[0275] A possible way to generate a physical signal is to generate the physical signal from the time domain, perform time domain resource mapping on a single OFDM symbol according to a sequence, and then perform time domain resource mapping on multiple OFDM symbols based on the result of the time domain resource mapping on the single OFDM symbol.

[0276] Nodes should assume that the sequence r(i) is defined as:

[0277]

[0278] Where, the pseudo-random sequence c(n), n = 0, 1, ..., 2x CPS +1 can be defined as

[0279] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0280] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0281] x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2

[0282] Among them, x CPS is the length of a single sub-physical signal. In this example, x CPS =1024, N C =1600, the first M sequence x 1 (n) is defined as x 1 (0)=1,x 1 (n) = 0, n = 1, 2, ..., 30. The second M sequence x 2 (n) generator uses The specific situation depends on the application of the above sequence. The time domain continuous signal of the lth OFDM symbol on antenna port p is It can be expressed as

[0283]

[0284] Among them, Fig.14A Corresponding One possible definition of is:

[0285]

[0286]

[0287] Among them, at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0288]

[0289] Embodiment 5: M=2, N=2v+1, where v is a positive integer

[0290] In a possible implementation, the value of N may be an odd number. When the value of M is greater than 1, for example, in this example, the value of M is 2 and the value of N is an odd number, the first signal may be generated in the time domain. The following description takes N=3 as an example. Figures 16A to 16C A schematic structural diagram of a physical signal including three sub-signals transmitted on two OFDM symbols according to at least one embodiment of the present disclosure is shown.

[0291] The following takes M=2, N=3 as an example (the physical signal format is as follows Fig. 12A , Fig. 12B and Fig. 12C As shown in Figure 2, a possible way to generate a physical signal is given. Since N / M is a non-integer, a physical signal can be generated in the time domain.

[0292] A possible way to generate a physical signal is to obtain a single sub-physical signal based on a sequence, obtain multiple sub-physical signals based on a single sub-physical signal, obtain a perceived cyclic prefix based on multiple sub-physical signals, or, a perceived cyclic prefix and a guard interval, and obtain the above physical signal based on multiple sub-physical signals and a perceived cyclic prefix, or, multiple sub-physical signals and a perceived cyclic prefix and a guard interval. This method can generate Fig. 16B and Fig. 16C The corresponding physical signal, one or more specific examples of this method have been described in Example 3 and Example 4, and will not be repeated here.

[0293] A possible way to generate a physical signal is to obtain multiple sub-physical signals based on the IFFT / IDFT transformation of the sequence. The node should assume that the sequence r(i) is defined as:

[0294]

[0295] Among them, the pseudo-random sequence c(n), n = 0, 1, ..., 2 (N x CPS )+1 can be defined as

[0296] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0297] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0298] x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2

[0299] Among them, N·x CPS is the length of N sub-physical signals. In this example, N·x CPS =8192,N C =1600, the first M sequence x 1 (n) is defined as x 1 (0)=1,x 1 (n) = 0, n = 1, 2, ..., 30. The second M sequence x 2 (n) generator uses The time domain continuous signal of the lth and l+1th OFDM symbols on antenna port p is represented by It can be expressed as

[0300]

[0301] Among them, Fig.16A Corresponding One possible definition of is:

[0302]

[0303]

[0304] Among them, at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, Tc Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0305]

[0306] Embodiment 6: M=3, N=6

[0307] Fig.17 The structure diagram of a physical signal including 6 sub-signals transmitted on 3 OFDM symbols according to at least one embodiment of the present disclosure is shown. It should be noted that the value of N is not limited to 6 in this example. When the value of N is a non-negative integer multiple of 3, the generation method described below is also followed, and the parameters related to N are adjusted accordingly; when the value of N is other integers, the generation method of the physical signal is similar to the process shown in Example 5, and the parameters related to N are adjusted accordingly;

[0308] The following takes M=3, N=6 as an example (the physical signal format is as follows Fig.17 As shown in FIG. 1 , a possible way to generate a physical signal is given. Since N / M is an integer, the physical signal can be generated in the time domain or the frequency domain.

[0309] Below is N port =8 as an example, the method of generating physical signals is described in detail. Taking the generation of physical signals from the frequency domain as an example, Fig.18 An example of frequency domain resource mapping of an 8-port physical signal when the physical signal is mapped onto three OFDM symbols in the time domain according to an embodiment of the present disclosure is shown.

[0310] A possible way to generate a physical signal is to perform frequency domain resource mapping on M OFDM symbols according to a sequence, and then perform time domain resource mapping on M OFDM symbols according to the frequency domain resource mapping results on the M OFDM symbols.

[0311] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following p superior

[0312]

[0313] Where l'=0,1,2, p represents the port number, (k,l) pRepresents the sequence number of the resource element defined by the k-th subcarrier and the l-th OFDM symbol in the resource grid (ResourceGrid) of port p. and A possible value of is shown in Table 4, where Indicates the number of sampling points of the CP corresponding to an OFDM symbol, Indicates the number of sampling points of a CP-free OFDM symbol, which is also the number of FFT / IFFT points. The beneficial effect is that when the signal shown in Formula 6 is transformed into the time domain, a part of the end of the symbol corresponding to l′=1 and the CP of the symbol corresponding to l′=2 together constitute the same time domain signal as the CP-free part corresponding to l′=2, and at the same time, a part of the end of the symbol corresponding to l′=0 and the CP of the symbol corresponding to l′=1 together constitute the same time domain signal as the CP-free part corresponding to l′=2. That is, the generation of the CP-free part of the three OFDM symbols corresponding to sub-physical signals 1 to 6 and the addition of the perceived cyclic prefix are realized at the same time. It should be noted that Table 6 is only one possible way to take the values ​​of the physical parameters, and the above parameters can also be defined by formulas.

[0314] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0315]

[0316]

[0317] in, l′=0,1,2,N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0318]

[0319] Table 6 Values ​​of some physical parameters

[0320]

[0321] A possible way of generating a physical signal is to obtain multiple sub-physical signals (for example, sub-physical signals 5 and 6) based on a sequence, obtain all sub-physical signals (for example, sub-physical signals 1-6) based on multiple sub-physical signals, obtain a perceived cyclic prefix based on multiple sub-physical signals, and obtain the above-mentioned physical signal based on multiple sub-physical signals, the perceived cyclic prefix, and a guard interval.

[0322] The device shall assume that the sequence r(n) used to generate the physical signal is scaled by a factor β to meet the transmit power requirement and is mapped to resource elements (k, l) according to the following p superior

[0323]

[0324] Among them, p represents the serial number of the port, (k,l) p Represents the sequence number of the resource element defined by the k-th subcarrier and the l-th OFDM symbol in the resource grid of port p. A possible value of is shown in Table 6a.

[0325] The time domain continuous signal of the lth OFDM symbol on antenna port p It can be expressed as:

[0326]

[0327]

[0328]

[0329] Among them, N FFT represents the number of Fourier transform points, Δf represents the subcarrier spacing; at the start time of the time slot t = 0, N CP Indicates the length of the cyclic prefix of a single OFDM symbol, T c Represents the time interval between the sample points of the time domain baseband signal, T symb =(N FFT +N CP )T c It represents the time length of the time domain baseband signal on an OFDM symbol, t start,l It represents the starting time of the lth OFDM symbol and the calculation formula is:

[0330]

[0331] Table 6a Values ​​of some physical parameters

[0332]

[0333] According to various embodiments of the present disclosure, in one implementation, before the configuration information is determined, the node sends a perception request, wherein the perception request may include one or more of the node's perception requirements, the node's communication requirements, and the node's collaborative perception requirements. For example, the UE first sends a perception request to the gNB, and the gNB calculates the configuration parameters based on one or more parameters related to the requirements in the UE's perception request, and sends the perception signal configuration to the UE. The beneficial effect of this mechanism is that it allows the UE to report the requirements to the gNB or the network, thereby obtaining the parameters and configuration of the perception signal that matches its requirements. In one possible implementation, the perception request may include the information elements shown in the following table.

[0334]

[0335] In one implementation, the node determines the configuration of one or more time units for transmitting signals based on at least one of the following: the maximum distance that the node expects to perceive, the target maximum speed that the node expects to perceive, the communication requirements of the node for the above one or more time units, the number of antenna ports used to transmit the above signal, and the number of physical resource elements or the proportion of physical resource elements for actually transmitting the uplink signal of a specific antenna port. As shown in Table 7, under different configurations, the values ​​of parameters M and N are different, the number of observation windows that can be set is related to parameter N, the number of sampling points in the observation window, and also the number of sampling points of a sub-physical signal are related to M and N, which can be defined by a preset or default configuration, or by specific signaling, and the perception performance under different configurations is different. At the same time, under different configurations, the number of symbols that can be used for downlink data demodulation is also different. Based on the above reasons, the node can determine the configuration of the above one or more time units for transmitting signals based on its perception requirements, such as the maximum distance expected to be perceived and / or the target maximum speed expected to be perceived, and one or more of the communication requirements of the node for the above one or more time units. One possible implementation is that when the maximum distance that the node expects to perceive is R1, and the maximum speed of the target that the node expects to perceive is v1, a configuration that satisfies both R1 and v1 is selected from different configurations. In addition, when the node has a communication demand for one or more of the above time units, a configuration with a larger number of symbols that can be used for downlink data demodulation can be selected from multiple configuration information that meet the above conditions. The beneficial effect of such a design is that it can support nodes to select the reference signal configuration they need according to their needs, making the system design more flexible.

[0336] Table 7 Parameter settings and performance under different configurations

[0337]

[0338] According to various embodiments of the present disclosure, in one implementation, a node may determine the transmission power of an uplink signal of a specific antenna port on one or more configured time units according to at least one of the following: one or more information in the configuration, for example, a power-related parameter configured by a high-level layer, the number of OFDM symbols M, the number of sub-physical signals or the number of repetitions of sub-physical signals N, and the number of antenna ports used to transmit the above-mentioned signals, the number of layers used to transmit the above-mentioned signals, and the number of physical resource elements or the proportion of physical resource elements actually transmitting the signal of the specific antenna port. A possible implementation is that when a node is configured with a power-related parameter (referred to as a first power parameter), for example, when a node is configured with a higher-layer parameter for indicating whether to perform power enhancement, the power ratio of the energy per resource element of the first signal to the energy per resource element (Energy per resource element, EPRE) of a specific signal (e.g., PDSCH and / or PDCCH) may be determined based on the first power parameter and / or the number of layers used to transmit the above-mentioned signal and / or the number of antenna ports used to transmit the above-mentioned signal. For example, the first power parameter is configured as 0, the number of antenna ports / layers is L, and the power parameter β of the first signal can be The first power parameter is configured as 0, and the number of antenna ports / layers is L, then the power-related parameter β of the first signal may be 0. Another possible implementation is that the transmit power of the above-mentioned physical signal may be adjusted in relation to the number of antenna ports and the number of physical resource elements or the ratio of physical resource elements. More specifically, for example, when the downlink signal is DMRS and / or PDSCH, a method for determining by the node the transmit power of the physical signal corresponding to the configured one or more time units may be to determine the ratio β of the energy per resource element (EPRE) of the PDSCH sent on the time unit of the one or more time units to the EPRE of the specific port PDSCH and / or DMRS sent on the one or more time units based on the ratio of the number of downlink signal antenna ports to the physical resource elements actually occupied by the downlink signal of a specific port on the one or more time units. For example, Among them, N port represents the number of downlink signal antenna ports, and η represents the proportion of physical resource elements occupied by the actual transmission of downlink signals of a specific port in one or more time units.

[0339] According to at least one embodiment of the present disclosure, in one implementation, when the physical reference signal is used for sensing, the node first sends the reference signal, the node receives the echo, performs frequency domain or time domain channel estimation and corresponding signal processing on the received signal, thereby obtaining the time domain channel estimation result corresponding to the data in the observation window, and then performs target detection and / or target angle estimation related to sensing. Preferably, channel estimation is performed from the frequency domain, which has the beneficial effect of reducing the amount of calculation.

[0340] It should be noted that when N is an odd number, compared to the case where N is an even number, the node needs to perform signal processing on the received echo that is different from the above process to achieve the perception function. The signal processing process includes: the node sends a reference signal, the node receives the echo, the node calculates one or more local signals for perception related to the above reference signal configuration, the node uses the above one or more local signals to perform frequency domain channel estimation or time domain channel estimation on the received signal, and then performs target detection and / or target angle estimation related to perception.

[0341] The following takes M=1, N=3 as an example, and describes the signal processing flow related to the receiver and perception based on the case where the sub-physical signal length adopts the preset or default configuration. The node sends a reference signal x[n]; the node receives the echo y[n]; the node calculates one or more local signals for perception related to the above reference signal configuration, assuming that the frequency domain signal corresponding to the above reference signal x[n] is X[k], k=1,2,...,N FFT A possible implementation method for calculating the local signal is that the local signal for the first observation window (corresponding to the second sub-physical signal) is the signal after adding linear phase rotation to X[k], and the calculation method can be in, Similarly, the local signal for the second observation window (corresponding to the third sub-physical signal) is the signal after adding linear phase rotation to X[k], which can be calculated as in, The node uses the above one or more local signals to perform frequency domain channel estimation or time domain channel estimation on the received signal. Taking frequency domain channel estimation as an example, the node can use the local signal X 1 [k] and X 2 [k] performs frequency domain channel estimation, and then performs IFFT / IDFT transformation on the channel estimation results to obtain multiple time domain channel estimation results. The channel estimation results within the range of points corresponding to the observation window are taken from the multiple time domain channel estimation results as the time domain channel estimation results corresponding to a certain observation window. Finally, the node uses the channel estimation results to perform perception-related target detection and / or target angle estimation.

[0342] Fig.19A simplified block diagram showing the hardware structure of the node device 1400 according to an embodiment of the present disclosure. Fig.19 The node device 1400 shown may be used to implement any method performed by a node according to the principles of the present disclosure.

[0343] refer to Fig.19 According to an embodiment of the present disclosure, the node device 1400 includes a transceiver 1401 and a controller 1402. Optionally, the node device 1400 may also include a memory (not shown). The transceiver 1401 may send a signal or data, or receive a signal or data. The controller 1402 may be coupled to the transceiver 1401 and the memory, and control the operation of the transceiver 1401 and the memory. The memory stores computer executable instructions, and when the instructions are executed by the controller 1402, at least one method corresponding to the above embodiments of the present disclosure is executed.

[0344] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0345] It will be appreciated by those skilled in the art that the present application may include devices for performing one or more of the operations described in the present application. These devices may be specially designed and manufactured for the desired purpose, or may include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconstructed. Such computer programs may be stored in a device (e.g., computer) readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus, respectively, the computer readable medium including but not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmab1e Read-Only Memory), flash memory, magnetic card or optical card. That is, the readable medium includes any medium that stores or transmits information in a readable form by a device (e.g., computer).

[0346] Those skilled in the art will appreciate that each block in these structure diagrams and / or block diagrams and / or flow charts and combinations of blocks in these structure diagrams and / or block diagrams and / or flow charts can be implemented using computer program instructions. Those skilled in the art will appreciate that these computer program instructions can be provided to a general-purpose computer, a professional computer, or a processor of other programmable data processing methods to implement, thereby executing the scheme specified in the block or multiple blocks of the structure diagram and / or block diagram and / or flow chart disclosed in the present invention through the processor of the computer or other programmable data processing method.

[0347] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes discussed in the present invention may be alternated, modified, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and schemes discussed in the present invention may also be alternated, modified, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in the present invention may also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0348] The above descriptions are only some embodiments of the present disclosure. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method performed by a first node in a communication system, comprising: obtaining configuration information related to the first signal, and obtaining, according to the configuration information, at least one of first information related to the length of the first signal, second information related to the length L of a sub-signal among a plurality of sub-signals included in the first signal, and third information related to the number N of the plurality of sub-signals, Generate the first signal based on at least one of the obtained first information, second information, and third information; Send the first signal. 2 . The method according to claim 1 , wherein the configuration information comprises at least one of the first information, the second information, and the third information.

3. The method according to claim 1 or 2, wherein: The first signal further includes a cyclic prefix CP, and a length of the CP is determined based on at least one of the following items: information related to the CP length included in the configuration information, the first information, the third information, and the second information.

4. The method according to any one of claims 1 to 3, wherein: Generating a first signal, comprising: generating a sub-signal based on the frequency domain sub-sequence, and obtaining the multiple sub-signals based on the sub-signal, The length of the frequency domain subsequence is one Nth of the length of the first signal. The frequency domain subsequence is a pseudo-random sequence, or the frequency domain subsequence is obtained by equally-interval extraction from a pseudo-random sequence corresponding to a sub-signal.

5. The method according to claim 4, in, Obtaining the N sub-signals based on the one sub-signal includes: extracting the one sub-signal to obtain an extracted sub-signal with a length of L, and obtaining the N sub-signals based on the extracted sub-signal.

6. The method according to any one of claims 1 to 3, wherein: Generating a first signal, comprising: Generate a sub-signal set corresponding to a time unit related to the first signal based on a frequency domain sequence corresponding to the time unit; The N sub-signals are obtained based on the sub-signal set.

7. The method according to claim 6, wherein: Generating a sub-signal set corresponding to a time unit related to the first signal based on a frequency domain sequence corresponding to the time unit, comprising: Obtaining a second frequency domain sequence based on a frequency domain sequence corresponding to a time unit, wherein the second frequency domain sequence is obtained by setting the frequency domain sequence to zero at equal intervals; A sub-signal set corresponding to the one time unit is generated based on the second frequency domain sequence.

8. The method according to any one of claims 1 to 3, wherein: Generating a first signal, comprising: The first signal is generated based on a first sequence.

9. The method according to claim 8, wherein: When, based on the first information, the number M of time units occupied by the first signal is greater than 1, generating the first signal based on the first sequence includes: Generate a time domain sub-signal set corresponding to a time unit based on the first sequence; The first signal corresponding to M time units is obtained based on the time domain sub-signal set.

10. The method according to any one of claims 1 to 3, wherein: Generating a first signal, comprising: Obtaining, based on the second sequence, values ​​of resource elements corresponding to the M time units corresponding to the first information; The first signal is obtained based on the value of the resource element.

11. The method according to any one of claims 1 to 3, wherein: Generating a first signal, comprising: Obtaining a value of a resource element corresponding to a time unit based on the second sequence; The first signal is obtained based on the value of the resource element.

12. The method according to claim 11, wherein: Obtaining the first signal based on the value of the resource element includes: Obtaining a time domain signal corresponding to the one time unit based on the value of the resource element; The first signal is obtained based on the time domain signal.

13. The method according to any one of claims 10 to 12, wherein: The second sequence is mapped to a first subcarrier set among the subcarriers corresponding to the M time units, and the values ​​of resource elements of other subcarriers among the subcarriers corresponding to the M time units are 0.

14. The method according to any one of claims 10 to 12, wherein: The second sequence is mapped to a first subcarrier set among the subcarriers corresponding to the M time units, the first subcarrier set maps a frequency domain sequence, and other subcarriers among the subcarriers corresponding to the M time units are scheduled with zero power reference signals ZP-RS.

15. A node device in a communication system, comprising: a transceiver configured to transmit and / or receive signals; A controller is configured to perform control so that the node performs the method according to any one of claims 1-14.

Images