Control information transmission method and device, equipment and storage medium

Abstract

The invention discloses a control information transmission method and device, equipment and a storage medium, and belongs to the technical field of mobile communication. The method is performed by a terminal device, comprising: receiving control information (1501), the control information being used for indicating or scheduling transmission of sidewalk information on a sidewalk link; the sidewalk information includes a reference signal for positioning.

Description

Control information transmission method, device, equipment and storage medium Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a method, apparatus, device and storage medium for transmitting control information. Background Art

[0002] With the continuous development of mobile communication technology, the demand for positioning based on mobile communication is also increasing. Among them, the positioning technology based on sidelink (SL) is one of the positioning enhancement solutions currently being studied.

[0003] Sidelink-based positioning refers to the reception and detection of signals between two or more terminals through sidelinks to achieve applications such as absolute positioning, relative positioning, ranging, and direction finding.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a method, apparatus, device, and storage medium for transmitting control information. The technical solution is as follows:

[0006] In one aspect, an embodiment of the present application provides a method for transmitting control information, the method being performed by a terminal device, the method comprising:

[0007] Control information is received, where the control information is used to indicate or schedule transmission of sidelink information on a sidelink; the sidelink information includes a reference signal used for positioning.

[0008] In one aspect, an embodiment of the present application provides a method for transmitting control information, the method being performed by a network device, the method comprising:

[0009] Control information is sent, where the control information is used to indicate or schedule the transmission of sidelink information of a terminal device on a sidelink; the sidelink information includes a reference signal for positioning.

[0010] On the other hand, an embodiment of the present application provides a device for transmitting control information, the device comprising:

[0011] The receiving module is used to receive control information, where the control information is used to indicate or schedule the transmission of sidelink information on the sidelink; the sidelink information includes a reference signal for positioning.

[0012] On the other hand, an embodiment of the present application provides a device for transmitting control information, the device comprising:

[0013] A sending module is used to send control information, where the control information is used to indicate or schedule the transmission of sidelink information of the terminal device on the sidelink; the sidelink information includes a reference signal for positioning.

[0014] On the other hand, an embodiment of the present application provides a terminal device, the terminal device including a processor, a memory, and a transceiver;

[0015] The memory stores a computer program, and the processor executes the computer program to enable the terminal device to implement the above-mentioned control information transmission method.

[0016] On the other hand, an embodiment of the present application provides a network device, the network device including a processor, a memory, and a transceiver;

[0017] The memory stores a computer program, and the processor executes the computer program to enable the network device to implement the above-mentioned control information transmission method.

[0018] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the above-mentioned control information transmission method.

[0019] On the other hand, the present application also provides a chip, which is used to run in a communication device so that the communication device executes the above-mentioned control information transmission method.

[0020] In another aspect, the present application provides a computer program product, comprising computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the above-described method for transmitting control information.

[0021] On the other hand, the present application provides a computer program, which is executed by a processor of a communication device to implement the above-mentioned control information transmission method.

[0022] An embodiment of the present application provides a resource configuration scheme, whereby a terminal device can receive control information for indicating or scheduling the transmission of sidelink information on a sidelink, and the sidelink information at least includes a reference signal for positioning. That is, the behavior of the terminal device in transmitting the reference signal for positioning on the sidelink can be controlled by the control information, thereby improving the controllability of the terminal device in performing sidelink-based positioning behavior, and further improving the flexibility of sidelink-based positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0025] Figures 2 to 5 are schematic diagrams of network coverage involved in this application;

[0026] Figures 6 to 8 are schematic diagrams of the transmission method involved in this application;

[0027] FIG9 is a diagram of the time slot structure in NR-V2X involved in this application;

[0028] FIG10 is a schematic diagram of the available OFDM symbol changes involved in this application;

[0029] FIG11 is a schematic diagram of the SCI mapping involved in this application;

[0030] FIG12 is a schematic diagram of the time-frequency domain position of the PSCCH DMRS involved in this application;

[0031] FIG13 is a schematic diagram of the time domain position involved in this application;

[0032] FIG14 is a schematic diagram of a single-symbol DMRS frequency domain type 1 involved in this application;

[0033] FIG15 is a flowchart of a method for transmitting control information provided by one embodiment of the present application;

[0034] FIG16 is a flowchart of a method for transmitting control information provided by one embodiment of the present application;

[0035] FIG17 is a flowchart of a method for transmitting control information provided by one embodiment of the present application;

[0036] FIG18 is a flowchart of a method for transmitting control information provided by one embodiment of the present application;

[0037] FIG19 is a block diagram of a device for transmitting control information provided by one embodiment of the present application;

[0038] FIG20 is a block diagram of a device for transmitting control information provided by one embodiment of the present application;

[0039] FIG21 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application are further described in detail below with reference to the accompanying drawings.

[0041] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0042] 1 shows a schematic diagram of a communication system according to an exemplary embodiment of the present application, which includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which are not limited in the present application.

[0043] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal device.

[0044] The terminal device 120 and / or terminal device 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0045] The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0046] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120.

[0047] The terminal device 120 and the terminal device 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0048] In some embodiments, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sideline communication scenario and a second sideline communication scenario. The first sideline communication refers to sending signals to the terminal device 130; the second sideline communication refers to sending signals to the terminal device 120.

[0049] Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0050] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0051] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0052] Before introducing the technical solutions of this application, we first introduce and explain some of the background technologies involved in this application. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0053] 1) Sideline communication in different network coverage environments

[0054] In sideline communication, according to the network coverage of the communicating terminals, it can be divided into sideline communication within network coverage, sideline communication with partial network coverage, and sideline communication outside network coverage, as shown in the network coverage diagrams of Figures 2 to 5 respectively.

[0055] Figure 2: In sideline communications within network coverage, all terminals performing sideline communications are within the coverage of the same base station. Thus, all of the above terminals can perform sideline communications based on the same sideline configuration by receiving configuration signaling from the base station.

[0056] Figure 3: In the case of partial network coverage and sideline communication, some terminals performing sideline communication are within the coverage area of ​​the base station. These terminals can receive configuration signaling from the base station and perform sideline communication according to the base station's configuration. However, terminals outside the network coverage area cannot receive configuration signaling from the base station. In this case, the terminals outside the network coverage area will determine the sideline configuration based on pre-configuration information and information carried in the sideline broadcast channel (PSBCH) sent by terminals within the network coverage area to perform sideline communication.

[0057] Figure 4: For sideline communications outside the network coverage, all terminals performing sideline communications are located outside the network coverage, and all terminals determine the sideline configuration according to pre-configured information for sideline communications.

[0058] Figure 5: For sideline communications with a central control node, multiple terminals form a communication group. This communication group has a central control node, which can also serve as the cluster head terminal (CH). The central control node has one of the following functions: responsible for establishing the communication group; joining and leaving group members; coordinating resources, allocating sideline transmission resources to other terminals, and receiving sideline feedback information from other terminals; coordinating resources with other communication groups, etc.

[0059] 2) D2D / V2X

[0060] Device-to-device communication (D2D) is a sidelink transmission technology based on D2D. Unlike traditional cellular systems, where communication data is received or sent via base stations, it offers higher spectrum efficiency and lower transmission latency. The connected vehicle system utilizes direct device-to-device communication, with 3GPP defining two transmission modes: Mode 1 and Mode 2.

[0061] Mode 1: The terminal's transmission resources are allocated by the base station, and the terminal transmits data on the sidelink based on the allocated resources. The base station can allocate resources for either single transmissions or semi-static transmissions. As shown in Figure 2, when the terminal is within network coverage, the network allocates transmission resources for sidelink transmissions.

[0062] Mode 2: The terminal selects a resource from the resource pool for data transmission. As shown in Figure 4, when the terminal is outside the cell coverage area, it autonomously selects a transmission resource from the pre-configured resource pool for sidelink transmission. Alternatively, as shown in Figure 2, the terminal autonomously selects a transmission resource from the network-configured resource pool for sidelink transmission.

[0063] 3) NR-V2X

[0064] In NR-V2X, autonomous driving needs to be supported, which places higher requirements on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

[0065] In LTE-V2X, broadcast transmission mode is supported, and in NR-V2X, unicast and multicast transmission modes are introduced. Please refer to Figures 6 to 8, which show schematic diagrams of the transmission modes involved in this application. For unicast transmission, there is only one receiving terminal, as shown in Figure 6, unicast transmission is performed between UE1 and UE2; for multicast transmission, the receiving end is all terminals in a communication group, or all terminals within a certain transmission distance, as shown in Figure 7, UE1, UE2, UE3 and UE4 constitute a communication group, where UE1 sends data, and other terminal devices in the group are all receiving terminals; for broadcast transmission mode, the receiving end is any terminal around the sending terminal, as shown in Figure 8, UE1 is the sending terminal, and the other terminals around it, UE2-UE6 are all receiving terminals.

[0066] 4) NR-V2X system frame structure

[0067] The time slot structure diagram in NR-V2X is shown in Figure 9: Figure 9(a) shows the time slot structure without the PSFCH channel in the time slot; Figure 9(b) shows the time slot structure including the PSFCH channel.

[0068] In NR-V2X, the PSCCH starts from the second sidelink symbol of the time slot in the time domain, occupies 2 or 3 OFDM symbols, and can occupy {10, 12 15, 20, 25} PRBs in the frequency domain. In order to reduce the complexity of the UE's blind detection of PSCCH, only one number of PSCCH symbols and PRBs are allowed to be configured in a resource pool. In addition, because the subchannel is the minimum granularity of PSSCH resource allocation in NR-V2X, the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a subchannel in the resource pool to avoid additional restrictions on PSSCH resource selection or allocation. PSSCH also starts from the second sidelink symbol of the time slot in the time domain. The last time domain symbol in the time slot is the guard period (GP) symbol, and the remaining symbols are mapped to PSSCH. The first sidelink symbol in a timeslot is a repetition of the second sidelink symbol. The receiving terminal typically uses the first sidelink symbol as an automatic gain control (AGC) symbol, and the data on this symbol is not typically used for data demodulation. The PSSCH occupies K subchannels in the frequency domain, each consisting of N consecutive physical resource blocks (PRBs), as shown in Figure 9(a).

[0069] When a time slot contains a PSFCH channel, the second to last and third to last symbols in the time slot are used for PSFCH channel transmission, and the time domain symbol before the PSFCH channel is used as a GP symbol, as shown in Figure 9(b).

[0070] 5)Sidelink PSSCH

[0071] In NR-V2X, the PSSCH carries the second-order SCI (SCI 2-A or SCI 2-B, see below for details) and data. The second-order SCI uses Polar coding and fixed Quadrature Phase Shift Keying (QPSK) modulation. The data portion of the PSSCH uses Low Density Parity Check (LDPC) and supports a maximum modulation order of 256 Quadrature Amplitude Modulation (QAM).

[0072] In NR-V2X, PSSCH supports up to two stream transmissions and uses a unit precoding matrix to map data on two layers to two antenna ports. At most, only one transport block (TB) can be sent in a PSSCH. However, unlike the transmission method of the PSSCH data part, when PSSCH adopts a dual-stream transmission method, the modulation symbols sent by the second-order SCI on both streams are exactly the same. This design can ensure the reception performance of the second-order SCI in highly correlated channels.

[0073] Since the maximum number of retransmissions of a PSSCH in NR-V2X is 32, if there are PSFCH resources in the resource pool and the configuration period of the PSFCH resources is 2 or 4, the OFDM symbols available in the time slot where different transmissions of a PSSCH are located may change. The schematic diagram of the change of the OFDM symbols available in the time slot where different transmissions of a PSSCH are located can be shown in Figure 10. If calculated according to the actual number of OFDM symbols in a time slot The difference in the number of symbols available for PSSCH transmission in a time slot may cause Q′ SCI2 Different, and Q′ SCI2 The change of will lead to the change of the size of the TB carried by PSSCH, as described below. In order to ensure that the TBS remains unchanged during multiple transmissions of PSSCH, The actual number of PSFCH symbols is not used. The number of resource elements (REs) occupied by the PSSCH demodulation reference signal (DMRS) and the number of REs occupied by the phase-tracking reference signal (PT-RS), which may change during the retransmission process, are not taken into account.

[0074] The code rate of the second-order SCI can be dynamically adjusted within a certain range. The specific code rate used is indicated by the first-order SCI, so the receiver does not need to perform blind detection on the second-order SCI even after the code rate changes. The modulation symbols of the second-order SCI are mapped in the frequency domain first and then in the time domain, starting from the symbol containing the first PSSCH DMRS. In the OFDM symbol containing the DMRS, the second-order SCI is mapped to the REs not occupied by the DMRS. The schematic diagram of the above SCI mapping can be shown in Figure 11.

[0075] The data portion of the PSSCH within a resource pool can use multiple different MCS tables, including the conventional 64QAM Modulation and Coding Scheme (MCS) table, the 256QAM MCS table, and the low-spectrum-efficiency 64QAM MCS table. The specific MCS table used in a transmission is indicated by the "MCS Table Indicator" field in the first-order SCI. To control the Peak to Average Power Ratio (PAPR), the PSSCH must be transmitted using contiguous PRBs. Since the subchannel is the minimum frequency-domain resource granularity of the PSSCH, this requires that the PSSCH must occupy contiguous subchannels.

[0076] 6) Sidelink Transmission Block Size (TBS)

[0077] PSSCH follows the transport block size (TBS) determination mechanism of the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) in NR, that is, the TBS is determined according to the reference value of the number of REs used for PSSCH in the time slot where PSSCH is located, so that the actual code rate is as close to the target code rate as possible. The purpose of using the reference value of the number of REs instead of the actual number of REs here is to ensure that the number of REs used to determine the TBS remains unchanged during the PSSCH retransmission process, so that the determined TBS size is the same. To achieve this goal, the reference value N of the number of REs occupied by PSSCH in the TBS determination process is used. RE Determined by the formula (0-1):

[0078] where n PRB is the number of PRBs occupied by PSSCH, is the number of REs occupied by the first-order SCI (including the REs occupied by the DMRS of the PSCCH), is the number of REs occupied by the second-order SCI (as described above), N′ RE Indicates the number of reference REs that can be used for PSSCH within a PRB, determined by formula (0-2):

[0079] in:

[0080] Indicates the number of subcarriers in a PRB;

[0081] Indicates the number of symbols available for sidelink in a time slot, excluding the last GP symbol and the first symbol used for automatic gain control (AGC);

[0082] The specific value is indicated by the "PSFCH Symbol Number" field in the first-order SCI, which is a reference value for the number of symbols occupied by the PSFCH;

[0083] The value of is configured by the Radio Resource Control (RRC) layer parameters and is used to indicate the reference value of the number of REs occupied by the PT-RS and the Channel State Information Reference Signal (CSI-RS);

[0084] Indicates the average number of DMRS REs in a time slot, which is related to the DMRS pattern allowed in the resource pool. For example, Table 1 shows the DMRS pattern allowed in the resource pool and The corresponding relationship diagram.

[0085] Table 1

[0086] 7) Sidelink DMRS (Demodulation Reference Signal)

[0087] In NR-V2X, the DMRS pattern of the PSCCH is the same as that of the NR downlink control channel (PDCCH). That is, the DMRS exists in each PSCCH OFDM symbol and is located in the frequency domain at {#1, #5, #9} REs of a PRB. Figure 12 shows the PSCCH DMRS position in the time-frequency domain. The PSCCH DMRS sequence is generated using formula (0-3):

[0088] Among them, the pseudo-random sequence c(m) is given by Initialize, where l is the index of the OFDM symbol where the DMRS is located in the time slot, is the index of the time slot where the DMRS is located in the system frame, Indicates the number of OFDM symbols in a time slot, N ID ∈{0,1,...,65535}, in a resource pool N ID The specific value is configured or pre-configured by the network.

[0089] NR-V2X draws on the design of the NR Uu interface and uses multiple time-domain PSSCH DMRS patterns. Within a resource pool, the number of available DMRS patterns is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol within the pattern are shown in Table 0-2. Figure 13 shows a schematic diagram of the time-domain position of four DMRS symbols when the PSSCH has 13 symbols.

[0090] Table 2

[0091] If multiple time-domain DMRS patterns are configured within the resource pool, the transmitting UE selects the specific time-domain DMRS pattern to use and indicates this in the first-order SCI. This design allows high-speed UEs to select a high-density DMRS pattern, thereby ensuring accurate channel estimation, while low-speed UEs can use a low-density DMRS pattern, thereby improving spectrum efficiency.

[0092] The generation method of the PSSCH DMRS sequence is almost identical to that of the PSCCH DMRS sequence. The only difference is the initialization formula c(m) of the pseudo-random sequence. init middle, p i The i-th CRC bit of the PSCCH that schedules the PSSCH, where L=24 is the number of bits of the PSCCH CRC.

[0093] NR PDSCH and PUSCH support two frequency domain DMRS patterns, namely DMRS frequency domain type 1 and DMRS frequency domain type 2, and for each frequency domain type, there are two different types: single DMRS symbol and double DMRS symbol. Single-symbol DMRS frequency domain type 1 supports 4 DMRS ports, and single-symbol DMRS frequency domain type 2 can support 6 DMRS ports. In the case of double DMRS symbols, the number of supported ports is doubled. However, in NR-V2X, since PSSCH only needs to support two DMRS ports at most, only single-symbol DMRS frequency domain type 1 is supported, as shown in Figure 14, which shows a schematic diagram of single-symbol DMRS frequency domain type 1.

[0094] 8) Sidelink-based positioning

[0095] Sidewalk-based positioning is one of the enhancements to Release 18 positioning technology. This topic will consider supporting scenarios and requirements for NR positioning use cases within, partially within, and outside of cellular network coverage. It will also consider positioning requirements for V2X, public safety, commercial, and Industrial Internet of Things (IIOT) use cases, and support the following features:

[0096] Absolute positioning, distance / direction finding, and relative positioning;

[0097] Study the positioning method combining lateral measurement and Uu interface measurement;

[0098] Study side-track positioning reference signals, including signal design, physical layer control signaling, resource allocation, physical layer measurements, and related physical layer processes;

[0099] Study the positioning system architecture and signaling process, such as configuration, measurement reporting, etc.

[0100] Regarding the above-mentioned Sidelink positioning technology, there has been no discussion of a solution for scheduling or indicating the transmission of a positioning reference signal, nor has there been any discussion of any solution for positioning technology based on the unlicensed frequency band SL-U.

[0101] For example, for the aforementioned sidelink positioning technology, there is no design for the specific content of the DCI, nor is there any solution for positioning technology based on the unlicensed SL-U band. For network scheduling mode SL positioning scheme 1, when the base station indicates / schedules the time-frequency resources (set) for transmitting the SL PRS on the sidelink through DCI, it is necessary to specify the format of the DCI and the specific information fields / content contained in the DCI.

[0102] If a new DCI format and corresponding information field are introduced, a completely new design is required. If the existing DCI format is used, then for the information fields contained in the existing DCI, once indicated, some information fields will have no specific function for scheduling SL PRS, such as PUCCH resource indicator, PSFCH-to-HARQ feedback timing indicator and other information fields. Because SL positioning technology does not introduce a feedback mechanism on the sidelink, it is impossible to provide feedback on the sidelink transmission status on the uplink resources.

[0103] Please refer to FIG15 , which shows a flowchart of a method for transmitting control information provided by an embodiment of the present application. The method may be performed by a terminal device, wherein the terminal device may be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 . The method may include the following steps:

[0104] Step 1501: Receive control information, where the control information is used to indicate or schedule the transmission of sidelink information on the sidelink; the sidelink information includes a reference signal for positioning.

[0105] In some embodiments, the above-mentioned control information is used to indicate or schedule the transmission of sidelink information on the sidelink, which may mean that the control information is used to indicate or schedule the transmission of sidelink information on the sidelink.

[0106] That is to say, after receiving the above control information, the terminal device can send sidelink information containing a reference signal for positioning on the sidelink according to the instruction / scheduling of the control information.

[0107] For example, after receiving the above-mentioned control information, the terminal device can send sidelink control information (Sidelink Control Information, SCI) on the sidelink according to the resources for sending sidelink information indicated / scheduled by the control information, so as to indicate the resources for sending sidelink information indicated / scheduled by the control information to the opposite device of the sidelink communication (another or multiple terminal devices), and send the above-mentioned sidelink information on the resources for sending sidelink information indicated / scheduled by the control information.

[0108] For example, after receiving the above control information, the terminal device can carry information indicating the resource through SCI in the time slot where the resource for sending sideline information indicated / scheduled by the control information is located, and send the sideline information on the resource.

[0109] Alternatively, after receiving the above control information, the terminal device can carry information indicating the resource through SCI in one / multiple time slots before the time slot where the resource for sending side information indicated / scheduled by the control information is located, and send the side information on the resource.

[0110] For another example, after receiving the above-mentioned control information, the terminal device may also send the above-mentioned sideline information on the resources indicated / scheduled by the control information for sending the sideline information without sending the SCI; at this time, the resources for the other device of the sideline communication to receive the sideline information may be indicated / scheduled by the network device to the other device of the sideline communication through another control information.

[0111] For example, after receiving the above-mentioned control information, the terminal device may not send information indicating the resource in the time slot where the resource for sending sideline information is indicated / scheduled by the control information, or in the time slot before the time slot where the resource for sending sideline information is located, and send the sideline information on the resource.

[0112] In some embodiments, the control information is used to indicate or schedule the transmission of sidelink information on the sidelink, which may mean that the control information is used to indicate or schedule the reception of sidelink information on the sidelink.

[0113] That is to say, after receiving the above control information, the terminal device can receive sidelink information containing a reference signal for positioning on the sidelink according to the instruction / scheduling of the control information.

[0114] For example, after receiving the above control information, the terminal device can blindly detect SCI on the side link according to the instruction / scheduling of the control information to obtain the resource where the side information is located, and receive the above side information on the resource where the side information is located.

[0115] For example, after receiving the above control information, the terminal device can start the blind detection of SCI according to the instruction of the control information, and receive the side information on the resources indicated by the blindly detected SCI.

[0116] Alternatively, after receiving the above control information, the terminal device can blindly detect the SCI on the time slot indicated by the control information, and receive the sidelink information on the resources indicated by the blindly detected SCI.

[0117] For another example, after receiving the above control information, the terminal device may also receive the above side information on the resources indicated / scheduled by the control information for receiving the side information without performing blind detection of the SCI.

[0118] For example, after receiving the above control information, the terminal device may parse and obtain resources for receiving sideline information, and receive the sideline information on the parsed resources.

[0119] In some embodiments, the above control information is sent by a network device.

[0120] For example, the control information is sent by a base station, or the control information is sent by a BBU.

[0121] In some embodiments, the control information may be sent by the network device via a physical downlink control channel (PDCCH).

[0122] For example, the control information may be downlink control information (DCI) sent by the network device through the PDCCH.

[0123] In some embodiments, the positioning reference signal is a positioning reference signal used in a sidelink scenario. For example, the positioning reference signal may be a sidelink positioning reference signal (SL PRS).

[0124] In some embodiments, the above-mentioned reference signal used for positioning may also be a positioning reference signal shared by sidelink scenarios and non-sidelink scenarios (such as cellular communication scenarios).

[0125] To sum up, in the scheme shown in the embodiment of the present application, the terminal device can receive control information for indicating or scheduling the transmission of sidelink information on the sidelink, and the sidelink information at least includes a reference signal for positioning, that is, the behavior of the terminal device transmitting the reference signal for positioning on the sidelink can be controlled by the control information, thereby improving the controllability of the terminal device's sidelink-based positioning behavior, and further improving the flexibility of sidelink-based positioning.

[0126] Please refer to FIG16 , which shows a flow chart of a method for transmitting control information provided by an embodiment of the present application. The method may be performed by a network device, wherein the network device may be the network device 110 in the network architecture shown in FIG1 . The method may include the following steps:

[0127] Step 1601: Send control information, where the control information is used to instruct or schedule the transmission of sidelink information of a terminal device on a sidelink; the sidelink information includes a reference signal for positioning.

[0128] To sum up, in the scheme shown in the embodiment of the present application, the network device can send control information for indicating or scheduling the transmission of sidelink information of the terminal device on the sidelink, and the sidelink information at least includes a reference signal for positioning, that is, the behavior of the terminal device transmitting the reference signal for positioning on the sidelink can be controlled by the control information, thereby improving the controllability of the terminal device's sidelink-based positioning behavior, and further improving the flexibility of sidelink-based positioning.

[0129] Among them, the schemes shown in Figures 15 and 16 above can be used for network equipment to instruct / schedule the terminal equipment to send side information containing a reference signal for positioning.

[0130] Please refer to FIG17 , which shows a flowchart of a method for transmitting control information provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the network device can be the network device 110 in the network architecture shown in FIG1 . The method can include the following steps:

[0131] Step 1710: The network device sends control information, and correspondingly, the terminal device receives the control information.

[0132] The above-mentioned control information is used to indicate or schedule the transmission of sidelink information of the terminal device on the sidelink; the sidelink information includes a reference signal for positioning.

[0133] In some embodiments, the above-mentioned side information includes:

[0134] Information sent on PSCCH, and reference signals;

[0135] or,

[0136] Information sent on the PSCCH, a reference signal, and information sent on the PSSCH.

[0137] In some embodiments, the above-mentioned sidelink information includes information sent on PSCCH and the reference signal, which refers to the indication information of the resources carrying the reference signal on PSCCH, and the reference signal is sent on the resources indicated by the indication information carried by PSCCH.

[0138] In some embodiments, the above-mentioned sidelink information includes information sent on the PSCCH and the reference signal, which refers to the indication information of the resources carrying the reference signal on the PSCCH, and the device identification of the counterpart device of the sidelink communication that needs to receive the reference signal, and the reference signal is sent on the resources indicated by the indication information carried by the PSCCH.

[0139] In some embodiments, the above-mentioned sidelink information includes information sent on PSCCH, a reference signal, and information sent on PSSCH, which refers to first indication information of the resources for the terminal device to carry the reference signal on PSCCH, and second indication information of the resources for the information sent on PSSCH, and the reference signal is sent on the resources indicated by the first indication information, and the information on PSSCH is sent on the resources indicated by the second indication information.

[0140] In some embodiments, the above-mentioned sidelink information includes information sent on PSCCH, a reference signal, and information sent on PSSCH, which refers to first indication information of the resources for the terminal device to carry the reference signal on PSCCH, second indication information of the resources for the information sent on PSSCH, and the device identification of the counterpart device of the sidelink communication that needs to receive the reference signal, and sends the reference signal on the resources indicated by the first indication information and sends the information on PSSCH on the resources indicated by the second indication information.

[0141] In some embodiments, the above-mentioned reference signal may be an SL PRS, or the above-mentioned reference signal may be a positioning reference signal shared by the sidelink scenario and the non-sidelink scenario.

[0142] In some embodiments, the PSCCH carrying the first indication information and the second indication information may be the same PSCCH; that is, the first indication information and the second indication information may be carried by the same PSCCH.

[0143] In some embodiments, the PSCCHs carrying the first indication information and the second indication information may be different PSCCHs; for example, the first indication information is carried by one PSCCH, and the second indication information is carried by another PSCCH.

[0144] That is, the above-mentioned side information may include the following:

[0145] 1) Side positioning reference information, including at least the following information:

[0146] PSCCH: used to indicate / schedule SL-PRS on the sidelink;

[0147] SL-PRS: Positioning Reference Signal;

[0148] 2) The sidelink positioning reference information SL-PRS and the sidelink shared channel PSSCH include at least the following information:

[0149] PSCCH: used to indicate / schedule PSSCH and SL-PRS on the sidelink;

[0150] PSSCH: used to carry sidelink data information;

[0151] SL-PRS: Positioning Reference Signal;

[0152] Optionally, the above-mentioned PSCCH is two independent PSCCHs, that is, one PSCCH is used to indicate the scheduling of PSSCH, and the other PSCCH is used to indicate the scheduling of SL-PRS.

[0153] In some embodiments, the control information is downlink control information DCI in a first format, and the first format is a format other than DCI format 3_0 and DCI format 3_1;

[0154] Alternatively, the control information is a DCI in a second format, and the second format is DCI format 3_0 or DCI format 3_1.

[0155] In the case where the control information is DCI, the DCI format of the control information may be one or more new DCI formats other than DCI format 3_0 and DCI format 3_1 used in the current Sidelink control scenario.

[0156] In the case of using the new DCI format, the new DCI format can be optimized for the transmission scenario of the corresponding positioning reference signal to remove unnecessary information fields, thereby improving the efficiency of control information transmission and the utilization of signaling resources.

[0157] Alternatively, when the control information is DCI, the DCI format of the control information may reuse DCI format 3_0 or DCI format 3_1 used in the Sidelink control scenario.

[0158] In the case of reusing the existing DCI format, there is no need to add new DCI for the positioning reference signal transmission scenario, thereby simplifying the complexity of DCI transmission and reception in the sideline communication scenario.

[0159] In some embodiments, a cyclic redundancy check (CRC) of the DCI in the first format is scrambled using a positioning-related radio network temporary identifier (RNTI).

[0160] When the format of the control information is the first format, the CRC of the control information is scrambled using the RNTI related to positioning.

[0161] Among them, in the case of the first format of the control information, the above-mentioned control information can be encrypted by the RNTI related to positioning. When the terminal device subsequently receives the control information, it can be de-encrypted by the RNTI related to positioning to verify whether the control information transmission is accurate, thereby improving the accuracy of the control information transmission.

[0162] Alternatively, when the format of the control information is the first format, the CRC of the control information may be encrypted using an RNTI that is not related to positioning.

[0163] In some embodiments, the positioning-related RNTI includes at least one of the following RNTIs:

[0164] A first RNTI is used for dynamic scheduling of a sidelink positioning reference signal;

[0165] The second RNTI is used for scheduling the configuration grant of the sidelink positioning reference signal;

[0166] And, the third RNTI is used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

[0167] At least two of the first RNTI, the second RNTI and the third RNTI may be the same RNTI.

[0168] That is, the positioning-related RNTI includes at least one of the following:

[0169] 1) Positioning RNTI (e.g., SL-POS-RNTI), used for dynamic grant of sidelink positioning reference signals.

[0170] 2) Positioning configuration grant RNTI (eg, SL-POS-CS-RNTI), used for scheduling the configuration grant of the sidelink positioning reference signal (configured grant).

[0171] 3) Sidelink RNTI (eg SL-POS-RNTI-1), used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

[0172] Due to the functional multiplexing, any two or three of the above three RNTIs can be combined into one RNTI.

[0173] In the above embodiment, the above control information is encrypted by using the RNTI for scheduling information including the positioning reference signal of the side link, so that the terminal device can accurately receive and de-encrypt the DCI of the positioning reference signal used to schedule the side link, thereby improving the accuracy of the control information transmission.

[0174] In some embodiments, when the sidelink information does not include information sent on the PSSCH and the control information is a DCI in the first format, the DCI in the first format does not include information indicating uplink resources for uplink feedback. In some embodiments, when the sidelink information includes information sent on the PSSCH and the control information is a DCI in the first format, the DCI in the first format may include information indicating uplink resources for uplink feedback.

[0175] In the above embodiment, if the sidelink information does not include information sent on the PSSCH (for example, it only includes the positioning reference signal of the sidelink), then there may be no need for uplink feedback for the sidelink information. At this time, the above-mentioned first format DCI may not include information on uplink resources for indicating uplink feedback, thereby simplifying the information format of the control information and improving the efficiency of transmission and parsing of the control information.

[0176] In the above embodiment, if the sidelink information includes information sent on the PSSCH (for example, it includes the positioning reference signal of the sidelink and information on the PSSCH at the same time), then the sidelink information may require uplink feedback (for example, there is a need to feedback to the network whether the information on the PSSCH is successfully sent). At this time, the above-mentioned first format DCI may not include information on uplink resources for indicating uplink feedback, so that the network can understand the sending status of the information on the PSSCH, and then make retransmission scheduling and other processing, thereby improving the accuracy and efficiency of the subsequent transmission of the sidelink information.

[0177] In some embodiments, the DCI in the first format does not include information for indicating uplink resources for uplink feedback, which may mean that the DCI in the first format does not include an information field for indicating uplink resources for uplink feedback.

[0178] In some embodiments, the above-mentioned first format DCI does not include information for indicating uplink resources for uplink feedback, which may mean that the first format DCI includes an information field for indicating uplink resources for uplink feedback, and the information field is empty, or the value of the information field is NULL.

[0179] In some embodiments, the DCI in the second format includes an information field for indicating uplink resources for uplink feedback.

[0180] In the above embodiment, in the case of the second format of the control information, since the control information follows the existing sidelink DCI format, it is necessary to set an information field for indicating the uplink resources for uplink feedback in the control information, so that the terminal can accurately parse the information contained in the control information through the existing sidelink DCI format, and ensure the accuracy of control information transmission when the indicated / scheduled sidelink information contains a reference signal for positioning.

[0181] The number of information fields for indicating uplink resources for uplink feedback contained in the DCI of the second format may be multiple.

[0182] In some embodiments, the information field for indicating the uplink resources for uplink feedback contained in the above-mentioned second format DCI may include information indicating the uplink resources; that is, regardless of whether the sidelink information scheduled by the above-mentioned second format control information includes information on the PSSCH, the above-mentioned second format DCI can actually indicate the uplink resources used for uplink feedback.

[0183] In some embodiments, the information field for indicating the uplink resources for uplink feedback contained in the above-mentioned second format DCI may not include information indicating the uplink resources; for example, when the sidelink information scheduled by the above-mentioned second format control information does not include information on the PSSCH, the information field for indicating the uplink resources for uplink feedback in the above-mentioned second format DCI may be empty, or the value may be NULL; for another example, when the sidelink information scheduled by the above-mentioned second format control information includes information on the PSSCH, the information field for indicating the uplink resources for uplink feedback in the above-mentioned second format DCI may actually indicate the uplink resources used for uplink feedback.

[0184] In some embodiments, when the sidelink information does not include information sent on the PSSCH, at least one of the following information is sent on the uplink resource of the uplink feedback:

[0185] The first message from the top;

[0186] Second information for indicating whether the sideline information has been sent;

[0187] And, third information determined by the terminal device itself.

[0188] Among them, the first information indicated by the above-mentioned high-level layer may be the specified information sent through the uplink resources of uplink feedback when the sidelink information scheduled by the high-level layer instructs the terminal device in the second format of control information does not include information on the PSSCH, and the second format of DCI actually indicates the uplink resources used for uplink feedback. For example, the first information may be ACK or NACK.

[0189] The above-mentioned second information for indicating whether the sidelink information is sent can be information determined according to the sending status of the sidelink information when the sidelink information scheduled by the terminal device in the second format of the control information does not include information on the PSSCH, and the second format of the DCI actually indicates the uplink resources used for uplink feedback.

[0190] For example, if the terminal device sends the above-mentioned sidelink information, it can send ACK information on the uplink resources used for uplink feedback; if the terminal device does not send the above-mentioned sidelink information, it can send NACK information on the uplink resources used for uplink feedback.

[0191] Alternatively, if the terminal device sends the above-mentioned sidelink information, NACK information can be sent on the uplink resources used for uplink feedback; if the terminal device does not send the above-mentioned sidelink information, ACK information can be sent on the uplink resources used for uplink feedback.

[0192] The third information determined by the above-mentioned terminal device itself may be the information that the terminal device determines to be fed back to the network when the sidelink information scheduled by the control information in the second format does not include information on the PSSCH, and the DCI in the second format actually indicates the uplink resources used for uplink feedback. For example, when the sidelink information scheduled by the control information in the second format does not include information on the PSSCH, and the DCI in the second format actually indicates the uplink resources used for uplink feedback, the terminal device determines by itself to send ACK through the uplink resources of the uplink feedback, or determines by itself to send NACK through the uplink resources of the uplink feedback, or determines by itself to send other values ​​(such as 0 or 1, etc.) through the uplink resources of the uplink feedback.

[0193] In the above embodiment, when the sidelink information scheduled by the control information of the second format does not include information on the PSSCH, and the DCI of the second format can actually indicate the uplink resources used for uplink feedback, the terminal device can also send information on the uplink resources of the uplink feedback, thereby supporting the multiplexing of the existing DCI format when only the positioning reference signal of the sidelink is scheduled.

[0194] In some embodiments, the control information is used to indicate a resource or a set of resources for a reference signal.

[0195] In some embodiments, the control information may only indicate a resource or a resource set of a positioning reference signal of the sidelink.

[0196] For example, when the sidelink information indicated / scheduled by the control information only includes the positioning reference signal of the sidelink, the control information only indicates the resource or resource set of the positioning reference signal of the sidelink.

[0197] For another example, when the sidelink information indicated / scheduled by the control information includes not only the sidelink positioning reference signal but also information on the PSSCH, the control information may also indicate only the resource or resource set of the sidelink positioning reference signal. In this case, the resource or resource set of the PSSCH information may be indicated by other information (e.g., another control information).

[0198] In some embodiments, the control information may indicate a resource or a resource set of a sidelink positioning reference signal, as well as other information in addition to the resource or the resource set of the sidelink positioning reference signal.

[0199] For example, when the sidelink information indicated / scheduled by the control information only includes the positioning reference signal of the sidelink, the control information indicates the resource or resource set of the positioning reference signal of the sidelink, and the identifier of the receiving device of the sidelink information.

[0200] For another example, when the sidelink information indicated / scheduled by the control information includes not only the positioning reference signal of the sidelink but also information on the PSSCH, the control information may also indicate the resources or resource sets of the positioning reference signal of the sidelink, as well as the resources or resource sets of the information on the PSSCH.

[0201] In the above embodiment, the information field of the control information includes at least one of the following information fields:

[0202] The first information field is used to carry the resource identifier of the reference signal;

[0203] The second information field is used to carry the offset of the comb structure of the reference signal and the size of the comb structure;

[0204] The third information field is used to carry time domain resource indication information of the reference signal;

[0205] The fourth information field is used to carry frequency domain resource indication information of the reference signal;

[0206] And, the fifth information field is used to carry the resource element RE offset of the reference signal.

[0207] In an embodiment of the present application, the resource or resource set of the positioning reference signal of the above-mentioned side link can be indicated by one or more of the resource identifier of the positioning reference signal of the side link, the offset of the comb tooth structure and the size of the comb tooth structure, time domain resource indication information, frequency domain resource indication information, resource element RE offset and other information, so as to ensure the accuracy of scheduling of the positioning reference signal of the side link.

[0208] Among them, the resource identifier of the reference signal in the above-mentioned first information field can be SL PRS resource ID, that is, the sidelink positioning reference signal resource ID; or, the resource identifier of the above-mentioned reference signal can also be the resource ID of the positioning reference signal shared by the sidelink and non-sidelink.

[0209] The offset of the comb tooth structure and the size of the comb tooth structure in the above-mentioned second information field may be the comb tooth structure offset and the related comb tooth structure size of the side link positioning reference signal; or, the offset of the comb tooth structure and the size of the comb tooth structure in the above-mentioned second information field may be the comb tooth structure offset and the related comb tooth structure size of the positioning reference signal shared by the side link and the non-side link.

[0210] The time domain resource indication information in the above-mentioned third information field can be used to indicate the time domain resources of the SL PRS; or, the time domain resource indication information in the above-mentioned third information field can also be used to indicate the time domain resources of the positioning reference signal shared by the side link and the non-side link.

[0211] The time domain resource indication information in the above-mentioned fourth information field can be used to indicate the frequency domain resources of the SL PRS; or, the time domain resource indication information in the above-mentioned third information field can also be used to indicate the frequency domain resources of the positioning reference signal shared by the side link and the non-side link.

[0212] The resource element RE offset in the above-mentioned fifth information field may indicate the offset between multiple resource units RE used to transmit SL PRS, or the resource element RE offset in the above-mentioned fifth information field may indicate the offset between multiple resource units RE used to transmit positioning reference signals shared by sidelinks and non-sidelinks.

[0213] In some embodiments, the time domain resource indication information of the reference signal includes at least one of the following information:

[0214] The starting orthogonal frequency division multiplexing (OFDM) symbol of the reference signal;

[0215] The number of OFDM symbols used for the reference signal.

[0216] In the above embodiment, the time domain resource indication information of the reference signal can indicate the starting OFDM symbol in the time domain where the SL PRS is located and the number of OFDM symbols occupied, so that the terminal device can accurately determine the OFDM symbol where the SL PRS needs to be sent, thereby ensuring the accuracy of the time domain scheduling of the positioning reference signal of the side link.

[0217] Among them, the starting orthogonal frequency division multiplexing OFDM symbol of the above-mentioned reference signal and the number of OFDM symbols of the reference signal can be indicated by a joint indication, that is, the information field A where the time domain resource indication information of the above-mentioned reference signal is located contains M bits, and the M bits are used to indicate the OFDM starting symbol used to send SL PRS in a time slot, and the number of OFDM symbols occupied by SL PRS.

[0218] Under the above-mentioned joint indication method, the above-mentioned information field A may include an M-bit start and length indicator value (SLIV) value, which simultaneously indicates the OFDM start symbol used to send SL PRS in a time slot and the number of OFDM symbols occupied by SL PRS.

[0219] Alternatively, under the above-mentioned joint indication method, the above-mentioned information field A may contain two values ​​with a total length of M bits, one of which is used to indicate the OFDM start symbol used to send SL PRS in a time slot, and the other value is used to indicate the number of OFDM symbols occupied by SL PRS.

[0220] In which, the starting orthogonal frequency division multiplexing OFDM symbol of the above-mentioned reference signal and the number of OFDM symbols of the reference signal can be indicated in the form of a bit map, that is, the information field A where the time domain resource indication information of the above-mentioned reference signal is located contains M bits, each bit corresponds to an OFDM, and each bit indicates whether the corresponding OFDM symbol is occupied or not through a numerical value.

[0221] For example, in the above-mentioned bit map method, the information field A where the time domain resource indication information of the above-mentioned reference signal is located contains M bits, each bit corresponds to an OFDM, and each bit is indicated by a 0 that the corresponding OFDM symbol is not occupied (that is, the SL PRS does not occupy the OFDM symbol), and is indicated by a 1 that the corresponding OFDM symbol is occupied (that is, the SL PRS occupies the OFDM symbol).

[0222] For another example, in the above-mentioned bit map method, the information field A where the time domain resource indication information of the above-mentioned reference signal is located contains M bits, each bit corresponds to an OFDM, and each bit is indicated by a 1 to indicate that the corresponding OFDM symbol is not occupied (that is, the SL PRS does not occupy the OFDM symbol), and is indicated by a 0 to indicate that the corresponding OFDM symbol is occupied (that is, the SL PRS occupies the OFDM symbol).

[0223] In some embodiments, the frequency domain resource indication information of the reference signal includes at least one of the following information:

[0224] Frequency domain resources of reference signals;

[0225] A set of frequency domain resources for reference signals.

[0226] In the above embodiment, the frequency domain resource indication information of the reference signal may indicate the frequency domain resource or frequency domain resource set where the SL PRS is located, thereby ensuring the accuracy of the frequency domain scheduling of the positioning reference signal of the sidelink.

[0227] Among them, the frequency domain resources of the above-mentioned reference signal can be indicated by a joint indication method, that is, the information field B where the frequency domain resource indication information of the above-mentioned reference signal is located contains K bits, and the K bits are used to indicate the sub-channel starting point and the number of sub-channels of the frequency domain resources of the reference signal.

[0228] In the above-mentioned joint indication mode, the above-mentioned information field B may include a K-bit start and length indicator (SLIV) value, which indicates the sub-channel starting point and the number of sub-channels at the same time.

[0229] Alternatively, under the above-mentioned joint indication mode, the above-mentioned information field B may include two values ​​with a total length of K bits, one of which is used to indicate the starting point of the subchannel of the frequency domain resource, and the other is used to indicate the number of subchannels of the frequency domain resource.

[0230] Among them, the frequency domain resources of the above-mentioned reference signal can be indicated in the form of a bit map, that is, the information field B where the time domain resource indication information of the above-mentioned reference signal is located contains K bits, each bit corresponds to a subchannel, and each bit indicates whether the corresponding subchannel is occupied or not through a numerical value.

[0231] For example, in the above-mentioned bit map method, the information domain B where the frequency domain resources of the above-mentioned reference signal are located contains K bits, each bit corresponds to a sub-channel, and each bit is indicated by a 0 to indicate that the corresponding sub-channel is not occupied (that is, the SL PRS does not occupy the sub-channel), and is indicated by a 1 to indicate that the corresponding sub-channel is occupied (that is, the SL PRS occupies the sub-channel).

[0232] For another example, in the above-mentioned bit map method, the information domain B where the frequency domain resources of the above-mentioned reference signal are located contains K bits, each bit corresponds to a sub-channel, and each bit is indicated by a 1 to indicate that the corresponding sub-channel is not occupied (that is, the SL PRS does not occupy the sub-channel), and is indicated by a 0 to indicate that the corresponding sub-channel is occupied (that is, the SL PRS occupies the sub-channel).

[0233] Step 1720: The terminal device sends sidelink information on the sidelink according to the control information.

[0234] In some embodiments, when transmitting sidelink information, the terminal device may transmit sidelink control information (SCI); the SCI includes at least one of a first information field, a second information field, a third information field, a fourth information field, and a fifth information field. Furthermore, when transmitting sidelink information, the terminal device may also transmit other information in addition to the SCI, such as the SL PRS, or information on the SL PRS and the PSSCH.

[0235] That is, at least one of the information fields carried in the above-mentioned DCI will be included in the scheduled SCI.

[0236] In the above embodiment, when the terminal device sends sidelink information, it can send the resource-related information field of SL PRS indicated in the above control information to the opposite device of the sidelink communication through SCI, and send SL PRS on the resources of SL PRS, so that the opposite device of the sidelink communication can accurately perform Sidelink-based positioning.

[0237] In some embodiments, the SCI includes at least one of the following:

[0238] First-order SCI carried on PSCCH;

[0239] Second-order SCI carried on PSSCH.

[0240] In the above embodiment, when sending SCI, the terminal device may carry the SCI on at least one of the PSCCH and PSSCH channels, thereby ensuring the flexibility of the resource indication of the SL PRS.

[0241] That is, the above-mentioned SCI may include: a first-order SCI carried on a PSCCH, and / or a second-order SCI carried on a PSSCH.

[0242] In some embodiments, the source of the sideline information includes at least one of the following resources:

[0243] Resources in licensed frequency bands;

[0244] resources on dedicated frequency bands;

[0245] and resources in unlicensed frequency bands.

[0246] In the above embodiment, the resources that the network device schedules to transmit sidelink information to the terminal device may include resources on the authorized frequency band, resources on the dedicated frequency band, and resources on the unlicensed frequency band, so that the sidelink communication including the reference signal for positioning can use at least one of the multiple resources, thereby expanding the resource usage scope of Sidelink-based positioning.

[0247] Based on the above FIG. 17 , in one embodiment, the network / base station sends first downlink control information (DCI) to indicate / schedule the sending of first sidelink information on the sidelink.

[0248] The CRC carried by the first downlink control information is scrambled using the first radio network temporary identifier RNTI.

[0249] The first RNTI includes at least one of the following:

[0250] o Positioning RNTI, (e.g., SL-POS-RNTI), used for dynamic grant of sidelink positioning reference signals.

[0251] o Positioning configuration grant RNTI, (e.g., SL-POS-CS-RNTI), used for scheduling the configured grant of the sidelink positioning reference signal.

[0252] o Sidelink RNTI (e.g. SL-POS-RNTI-1), used for scheduling the sidelink positioning reference signal, sidelink control channel PSCCH, and sidelink shared channel PSSCH.

[0253] Due to functional reusability, any two or three of the above three RNTIs can be combined into one RNTI.

[0254] The first side information includes at least one of the following:

[0255] 1) Side positioning reference information SL-PRS, including at least the following information:

[0256] o PSCCH: used to indicate / schedule SL-PRS on the sidelink;

[0257] o SL-PRS: Positioning Reference Signal;

[0258] 2) The sidelink positioning reference information SL-PRS and the sidelink shared channel PSSCH include at least the following information:

[0259] o PSCCH: used to indicate / modulate PSSCH and SL-PRS on the sidelink;

[0260] o PSSCH: used to carry sidelink data information;

[0261] o SL-PRS: Positioning Reference Signal;

[0262] Optionally, the above-mentioned PSCCH is two independent PSCCHs, that is, one PSCCH is used to indicate the scheduling of PSSCH, and the other PSCCH is used to indicate the scheduling of SL-PRS.

[0263] The information field carried by the first downlink control information DCI may be as follows:

[0264] The information carried by the DCI includes at least one of the following:

[0265] 1) SL PRS resource ID: Sideline positioning reference signal resource ID.

[0266] 2) SL PRS comb offset and associated SL PRS comb size: Side positioning reference signal comb structure offset and associated comb structure size.

[0267] 3)SL PRS starting OFDM symbol and number of SL PRS OFDM symbols: the starting OFDM symbol and number of OFDM symbols of the sidelink positioning reference signal.

[0268] o The OFDM symbol indication method includes at least one of the following:

[0269] Joint indication mode: The information field A contains M bits, which are used to indicate the OFDM start symbol and the number of OFDM symbols in a time slot;

[0270] Bitmap method: The information field A contains M bits, each bit corresponds to an OFDM, and each bit indicates whether the corresponding OFDM symbol is occupied or not by 0 or 1.

[0271] 4)SL PRS frequency domain allocation: Sidetrack positioning reference signal frequency domain resource or frequency domain resource set.

[0272] o The indication method of the above-mentioned frequency domain resource (set) includes at least one of the following:

[0273] – Joint indication mode: The information field B contains K bits, which are used to indicate the subchannel starting point and the number of subchannels;

[0274] – Bitmap mode: The information field B contains K bits, each bit corresponds to a subchannel, and each bit is 0 or 1 to indicate whether the corresponding subchannel is occupied or not.

[0275] 5)RE offset: resource element offset.

[0276] The information carried by SCI (Sidelink Control Information) can be as follows:

[0277] The information fields carried in the DCI, at least one of which will be included in the scheduled SCI;

[0278] The above-mentioned SCI includes: first-order SCI carried on PSCCH, and / or second-order SCI carried on PSSCH.

[0279] Based on FIG. 17 , in another embodiment, the network / base station sends second downlink control information (DCI) to indicate / schedule the sending of second sidelink information on the sidelink.

[0280] Among them, the above-mentioned second downlink control information can be the downlink control information of the existing NR side link (DCI 3_0 / DCI 3_1), and the second downlink control information includes multiple information fields for indicating the first uplink resource of uplink feedback.

[0281] The second side information includes at least one of the following:

[0282] 1) Side positioning reference information SL-PRS, including at least the following information:

[0283] o PSCCH: used to indicate / schedule SL-PRS on the sidelink;

[0284] o SL-PRS: Positioning Reference Signal;

[0285] 2) The sidelink positioning reference information SL-PRS and the sidelink shared channel PSSCH include at least the following information:

[0286] o PSCCH: used to indicate / modulate PSSCH and SL-PRS on the sidelink;

[0287] o PSSCH: used to carry sidelink data information;

[0288] o SL-PRS: Positioning Reference Signal;

[0289] Optionally, the above-mentioned PSCCH is two independent PSCCHs, that is, one PSCCH is used to indicate the scheduling of PSSCH, and the other PSCCH is used to indicate the scheduling of SL-PRS.

[0290] The information field included in the above-mentioned second downlink control information can be added on the basis of the existing NR side link downlink control information, such as the information field included in the above-mentioned first downlink control information.

[0291] When the second sidelink information includes only the PSCCH and the SL PRS, the information sent by the UE terminal on the first uplink resource includes at least one of the following information:

[0292] 1) The higher layer instructs the UE on the specific content to be sent on the first uplink resource, such as ACK or NACK;

[0293] 2) If the UE does not send PSCCH / SL PRS on the sidelink resource, it sends NACK; if the UE sends PSCCH / SL PRS on the sidelink resource, it sends ACK;

[0294] 3) The UE decides by itself, through implementation, to send specific content, such as ACK or NACK, on ​​the first uplink resource.

[0295] Among them, based on the solution shown in Figure 17 above, the terminal device can report the type of side information it wants to send to the network device in advance so that the network device can perform more precise scheduling.

[0296] Please refer to Figure 18, which shows a flowchart of a method for transmitting control information provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the above-mentioned terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in Figure 1, and the above-mentioned network device can be the network device 110 in the network architecture shown in Figure 1; based on the above-mentioned Figure 17, step 1702 can also be included before step 1710.

[0297] Step 1702: The terminal device sends a first request message, and the network device receives the first request message; the first request message is information sent to the network device; the first request message indicates whether the sidelink information includes information sent on the PSSCH.

[0298] Correspondingly, when executing step 1710, the network device may send the above control information according to the first request information.

[0299] That is, the UE may send first request information to the network / base station, where the first request information includes at least one of the following:

[0300] The sidelink transmits PSCCH and SL PRS;

[0301] The sidelinks transmitted are PSCCH and PSSCH, as well as PSCCH and SL PRS.

[0302] In the above embodiment, before the network device sends control information to instruct / schedule the terminal device to send sidelink information on the sidelink, it can first receive the first request information sent by the terminal device. The first request information can instruct the terminal device to send only SL PRS, or to send both SL PRS and information on PSSCH. Accordingly, when sending control information, the network device also sends corresponding control information according to the instruction of the first request information, so that the network device can perform more accurate instructions / scheduling according to the type of sidelink information to be sent reported by the terminal device, thereby improving the accuracy of sidelink information scheduling.

[0303] In some embodiments, the sending of the first request information includes:

[0304] The terminal device sends the first request information when sending the scheduling request SR or the buffer status report BSR.

[0305] That is to say, the first request information may be reported to the network together with the SR / BSR.

[0306] In the above embodiment, the terminal device may report the first request information together with the SR or BSR to the network device, thereby reusing the existing reporting mechanism and simplifying the reporting process of the first request information.

[0307] In some embodiments, the first request information is included in the SR or BSR; thus, no additional signaling is needed for the first request message, thereby saving signaling resources.

[0308] Alternatively, the first request information is information independent of the SR or BSR; in this way, the first request message can be independent of the SR or BSR, and there is no need to modify the signaling format of the SR or BSR, thereby reducing the complexity of the system signaling.

[0309] In some embodiments, the sending of the first request information includes:

[0310] The terminal device sends the above-mentioned first request information in addition to sending the scheduling request SR or the buffer status report BSR.

[0311] The sending process of the first request information may not be bound to the SR or BSR, thereby improving the flexibility of reporting the first request information.

[0312] For example, the first request information may be sent by the terminal device to the network device when a trigger condition is met, or the first request information may be actively sent by the terminal device to the network device.

[0313] The trigger conditions may include: the terminal device receiving a positioning request; or the time since the last sending of a positioning reference signal reaches a threshold, etc.

[0314] The above-mentioned situation where the terminal device actively sends the signal may refer to the terminal receiving high-layer signaling to initiate positioning.

[0315] In some embodiments, the DCI format of the control information corresponds to the resource pool where the transmission resources of the sidelink information are located.

[0316] In the above embodiment, the network device can determine the DCI format used for the control information based on the resource pool where the transmission resources of the side information are located, so that it can select a suitable DCI format based on the resource pool where the side information to be sent by the network device is located, thereby ensuring the rationality of the DCI format selection.

[0317] Alternatively, the DCI format of the above control information may be determined by the network device itself, or requested to be set by the terminal device.

[0318] In some embodiments, the resource pool where the transmission resources of the sidelink information are located includes:

[0319] A dedicated resource pool for reference signals used for positioning; or,

[0320] Reference signals for positioning, and a shared resource pool for sideline communications.

[0321] In one embodiment, when the sidelink information does not involve information on the PSSCH, the resource pool where the transmission resources of the sidelink information are located may be the dedicated resource pool or the shared resource pool.

[0322] In one embodiment, when the sidelink information involves information on the PSSCH, the resource pool where the transmission resources of the sidelink information are located may be the above-mentioned shared resource pool.

[0323] In the above embodiment, a dedicated resource pool can be set up for the reference signal used for positioning, and another reference signal for positioning and a shared resource pool for side communication can be set up. Subsequent network equipment can flexibly select the resource pool where the resources of the side information are located according to the information type of the side information to be sent by the terminal device, thereby improving the flexibility of the indication / scheduling of the side information.

[0324] In some embodiments, when the resource pool where the transmission resource of the sideline information is located is a dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resource of the sideline information is located is a shared resource pool, the DCI format of the control information is the first format;

[0325] Alternatively, when the resource pool where the transmission resources of the sidelink information are located is a dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resources of the sidelink information are located is a shared resource pool, the DCI format of the control information is the second format.

[0326] That is, in the above embodiment, when scheduling / instructing the transmission of sidelink information, the network device may use corresponding DCI formats in different resource pools:

[0327] a) The first resource pool is a dedicated resource pool for SL PRS positioning, corresponding to the use of DCI format 1;

[0328] b) The second resource pool is a shared resource pool for SL PRS and SL communications, corresponding to the use of DCI format 2.

[0329] The DCI in format 1 and the DCI in format 2 may be the same or different. For example, the control information sent through the shared resource pool may use the DCI in the first format or the DCI in the second format.

[0330] In the above embodiment, for sidelink information that includes information on both SL PRS and PSSCH, the network device can schedule / indicate resources in the second resource pool through DCI in the second format. For sidelink information that does not include information on PSSCH, the network device can schedule resources in the first resource pool through DCI in the first format, and can also schedule / indicate resources in the second resource pool through DCI in the second format, thereby improving the flexibility of resource and DCI format selection for sidelink information.

[0331] In some embodiments, when the length of the DCI in the first format is smaller than the length of the DCI in the second format, and the control information is the DCI in the first format, padding information is included at the end of the control information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format;

[0332] Alternatively, when the length of the DCI in the first format is greater than the length of the DCI in the second format and the control information is the DCI in the second format, the end of the control information includes padding information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format.

[0333] In the case where the system supports the sending of sideline information scheduled by DCI of the first format and DCI of the second format at the same time, since the lengths of DCI of the first format and DCI of the second format may be different, if the network device directly sends DCI of the first format or DCI of the second format, the terminal device needs to attempt to receive DCI formats of different lengths separately when receiving, which increases the complexity of the network device receiving DCI. In this regard, in the above embodiment, when the network device sends DCI of the first format or DCI of the second format, the length of the two formats of DCI can be unified, and for the shorter DCI, padding is performed at the end until the length is the same as the other DCI. In this way, when the network device receives DCI, it only needs to perform DCI detection and reception based on one DCI length, thereby simplifying the complexity of the terminal device receiving DCI.

[0334] In some embodiments, the padding information is a bit with a value of zero. Alternatively, the value of the padding information may be other values, such as a specified value of 1.

[0335] In the above embodiment, when the network device sends DCI, it can add zeros after the shorter format DCI. After the terminal device subsequently receives the DCI, it can discard the last zero bit of the received DCI, thereby achieving accurate DCI content. While simplifying the complexity of receiving DCI, it can also ensure the accuracy of DCI reception.

[0336] In some embodiments, the network device may pad zeros after the shorter format of the DCI when the terminal device is configured to monitor two formats of DCI.

[0337] For example, the DCI bit length can be processed as follows:

[0338] If the UE is configured to monitor downlink control information in the second format, such as DCI format 3_0, and the bit length of the downlink control information DCI in the first format is less than the bit length of DCI format 3_0, the downlink control information DCI in the first format needs to be padded with zeros to make the length of the downlink control information DCI in the first format equal to that of DCI format 3_0.

[0339] If the UE is configured to monitor downlink control information in the second format, such as DCI format 3_1, and the bit length of the downlink control information (DCI) in the first format is shorter than that of DCI format 3_1, the downlink control information (DCI) in the first format needs to be padded with zeros to ensure that the length of the downlink control information (DCI) in the first format is equal to that of DCI format 3_1.

[0340] If the UE is configured to monitor downlink control information in the second format, such as DCI format 3_0, and the bit length of the downlink control information DCI in the first format is greater than the bit length of DCI format 3_0, the DCI in DCI format 3_0 needs to be padded with zeros to make the length of the DCI in DCI format 3_0 equal to the length of the downlink control information DCI in the first format.

[0341] If the UE is configured to monitor downlink control information in the second format, such as DCI format 3_1, and the bit length of the downlink control information (DCI) in the first format is greater than that in DCI format 3_1, the UE needs to add zeros after the DCI in DCI format 3_1 to ensure that the length of the DCI in DCI format 3_1 is equal to the length of the downlink control information (DCI) in the first format.

[0342] Alternatively, the above-mentioned padding information may also be a bit with a value of 1.

[0343] Please refer to Figure 19, which shows a block diagram of a control information transmission device provided by an embodiment of the present application. The control information transmission device has the function of implementing the method shown in Figure 15, Figure 17 or Figure 18 above, which is performed by the terminal device. As shown in Figure 19, the device may include:

[0344] The receiving module 1901 is used to receive control information, where the control information is used to indicate or schedule the transmission of sidelink information on the sidelink; the sidelink information includes a reference signal used for positioning.

[0345] In some embodiments, the side information includes:

[0346] Information sent on the PSCCH, and the reference signal;

[0347] Or, the information sent on the PSCCH, the reference signal, and the information sent on the PSSCH.

[0348] In some embodiments, the control information is downlink control information DCI in a first format, and the first format is a format other than DCI format 3_0 and DCI format 3_1;

[0349] Alternatively, the control information is a DCI in a second format, and the second format is DCI format 3_0 or DCI format 3_1.

[0350] In some embodiments, the cyclic redundancy check code CRC of the DCI in the first format is scrambled using a radio network temporary identifier RNTI related to positioning.

[0351] In some embodiments, the positioning-related RNTI includes at least one of the following RNTIs:

[0352] A first RNTI is used for dynamic scheduling of a sidelink positioning reference signal;

[0353] The second RNTI is used for scheduling the configuration grant of the sidelink positioning reference signal;

[0354] And, the third RNTI is used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

[0355] In some embodiments, when the sidelink information does not include information sent on the PSSCH, and the control information is a DCI in a first format, the DCI in the first format does not include information on uplink resources for indicating uplink feedback.

[0356] In some embodiments, the DCI in the second format includes an information field for indicating uplink resources for uplink feedback.

[0357] In some embodiments, the apparatus further comprises:

[0358] The sending module 1902 is configured to send at least one of the following information on the uplink resource of the uplink feedback when the sidelink information does not include information sent on the PSSCH:

[0359] The first message from the top;

[0360] second information for indicating whether the sidelink information has been sent;

[0361] And, third information determined by the terminal device itself.

[0362] In some embodiments, the apparatus further comprises:

[0363] The sending module 1902 is configured to send a first request message; the first request message is information sent to a network device; the first request message indicates whether the sidelink information includes information sent on a PSSCH.

[0364] In some embodiments, the sending module 1902 is configured to send the first request information when sending a scheduling request SR or a buffer status report BSR.

[0365] In some embodiments, the first request information is included in an SR or a BSR;

[0366] Alternatively, the first request information is information independent of SR or BSR.

[0367] In some embodiments, the DCI format of the control information corresponds to a resource pool where the transmission resource of the sidelink information is located.

[0368] In some embodiments, the resource pool where the transmission resource of the sidelink information is located includes:

[0369] a dedicated resource pool of the reference signal used for positioning; or

[0370] The reference signal is used for positioning, and a shared resource pool for sideline communication.

[0371] In some embodiments, when the resource pool where the transmission resource of the sideline information is located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resource of the sideline information is located is the shared resource pool, the DCI format of the control information is the first format;

[0372] Alternatively, when the resource pool where the transmission resources of the sideline information are located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resources of the sideline information are located is the shared resource pool, the DCI format of the control information is the second format.

[0373] In some embodiments, when the length of the DCI in the first format is less than the length of the DCI in the second format, and the control information is the DCI in the first format, padding information is included at the end of the control information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format;

[0374] Alternatively, when the length of the DCI in the first format is greater than the length of the DCI in the second format and the control information is the DCI in the second format, the end of the control information includes padding information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format.

[0375] In some embodiments, the padding information is bits with a value of zero.

[0376] In some embodiments, the control information is used to indicate a resource or a set of resources of the reference signal.

[0377] In some embodiments, the information field of the control information includes at least one of the following information fields:

[0378] A first information field, used to carry a resource identifier of the reference signal;

[0379] The second information field is used to carry the offset and size of the comb structure of the reference signal;

[0380] The third information field is used to carry time domain resource indication information of the reference signal;

[0381] A fourth information field, used to carry frequency domain resource indication information of the reference signal;

[0382] And, the fifth information field is used to carry the resource element RE offset of the reference signal.

[0383] In some embodiments, the time domain resource indication information of the reference signal includes at least one of the following information:

[0384] A starting orthogonal frequency division multiplexing (OFDM) symbol of the reference signal;

[0385] The number of OFDM symbols of the reference signal.

[0386] In some embodiments, the frequency domain resource indication information of the reference signal includes at least one of the following information:

[0387] frequency domain resources of the reference signal;

[0388] The frequency domain resource set of the reference signal.

[0389] In some embodiments, the apparatus further comprises:

[0390] The sending module is used to send sidelink control information SCI; the SCI includes at least one information field among the first information field, the second information field, the third information field, the fourth information field and the fifth information field.

[0391] In some embodiments, the SCI includes at least one of the following:

[0392] First-order SCI carried on PSCCH;

[0393] Second-order SCI carried on PSSCH.

[0394] In some embodiments, the source of the side information includes at least one of the following resources:

[0395] Resources in licensed frequency bands;

[0396] resources on dedicated frequency bands;

[0397] and resources in unlicensed frequency bands.

[0398] Please refer to Figure 20, which shows a block diagram of a control information transmission device provided by an embodiment of the present application. The control information transmission device has the function of implementing the method shown in Figure 16, Figure 17 or Figure 18 above, which is performed by the network device. As shown in Figure 20, the device may include:

[0399] The sending module 2001 is used to send control information, where the control information is used to instruct or schedule the transmission of sidelink information of the terminal device on the sidelink; the sidelink information includes a reference signal for positioning.

[0400] In some embodiments, the side information includes:

[0401] Information sent on PSCCH and the reference signal;

[0402] or,

[0403] Information sent on the PSCCH, the reference signal, and information sent on the PSSCH.

[0404] In some embodiments, the control information is downlink control information DCI in a first format, and the first format is a format other than DCI format 3_0 and DCI format 3_1;

[0405] Alternatively, the control information is a DCI in a second format, and the second format is DCI format 3_0 or DCI format 3_1.

[0406] In some embodiments, the cyclic redundancy check code CRC of the DCI in the first format is scrambled using a radio network temporary identifier RNTI related to positioning.

[0407] In some embodiments, the positioning-related RNTI includes at least one of the following RNTIs:

[0408] A first RNTI is used for dynamic scheduling of a sidelink positioning reference signal;

[0409] The second RNTI is used for scheduling the configuration grant of the sidelink positioning reference signal;

[0410] And, the third RNTI is used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

[0411] In some embodiments, when the sidelink information does not include information sent on the PSSCH, and the control information is a DCI in a first format, the DCI in the first format does not include an information field for indicating uplink resources for uplink feedback.

[0412] In some embodiments, the DCI in the second format includes an information field for indicating uplink resources for uplink feedback.

[0413] In some embodiments, the apparatus further comprises:

[0414] The receiving module 2002 receives at least one of the following information on the uplink resource of the uplink feedback when the sidelink information does not include information sent on the PSSCH:

[0415] First information indicated by a higher layer to the terminal device;

[0416] Second information for indicating whether the terminal device has sent the sidelink information;

[0417] And, third information determined by the terminal device itself.

[0418] In some embodiments, the apparatus further comprises:

[0419] Receiving module 2002 receives first request information; the first request information is information sent by the terminal device; the first request information indicates whether the sidelink information includes information sent on the PSSCH;

[0420] The sending control information includes:

[0421] The control information is sent according to the first request information.

[0422] In some embodiments, the receiving module 2002 is configured to receive the first request information when receiving a scheduling request SR or a buffer status report BSR.

[0423] In some embodiments, the first request information is included in an SR or a BSR;

[0424] Alternatively, the first request information is information independent of SR or BSR.

[0425] In some embodiments, the DCI format of the control information corresponds to a resource pool where the transmission resource of the sidelink information is located.

[0426] In some embodiments, the resource pool where the transmission resource of the sidelink information is located includes:

[0427] a dedicated resource pool of the reference signal used for positioning; or

[0428] The reference signal is used for positioning, and a shared resource pool for sideline communication.

[0429] In some embodiments, when the resource pool where the transmission resource of the sideline information is located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resource of the sideline information is located is the shared resource pool, the DCI format of the control information is the first format;

[0430] Alternatively, when the resource pool where the transmission resources of the sideline information are located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resources of the sideline information are located is the shared resource pool, the DCI format of the control information is the second format.

[0431] In some embodiments, when the length of the DCI in the first format is less than the length of the DCI in the second format, and the control information is the DCI in the first format, padding information is included at the end of the control information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format;

[0432] Alternatively, when the length of the DCI in the first format is greater than the length of the DCI in the second format and the control information is the DCI in the second format, the end of the control information includes padding information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format.

[0433] In some embodiments, the padding information is bits with a value of zero.

[0434] In some embodiments, the control information is used to indicate a resource or a set of resources of the reference signal.

[0435] In some embodiments, the information field of the control information includes at least one of the following information fields:

[0436] A first information field, used to carry a resource identifier of the reference signal;

[0437] The second information field is used to carry the offset and size of the comb structure of the reference signal;

[0438] The third information field is used to carry time domain resource indication information of the reference signal;

[0439] A fourth information field, used to carry frequency domain resource indication information of the reference signal;

[0440] And, the fifth information field is used to carry the resource element RE offset of the reference signal.

[0441] In some embodiments, the time domain resource indication information of the reference signal includes at least one of the following information:

[0442] A starting orthogonal frequency division multiplexing (OFDM) symbol of the reference signal;

[0443] The number of OFDM symbols of the reference signal.

[0444] In some embodiments, the frequency domain resource indication information of the reference signal includes at least one of the following information:

[0445] frequency domain resources of the reference signal;

[0446] The frequency domain resource set of the reference signal.

[0447] In some embodiments, the source of the side information includes at least one of the following resources:

[0448] Resources in licensed frequency bands;

[0449] resources on dedicated frequency bands;

[0450] and resources in unlicensed frequency bands.

[0451] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0452] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0453] Please refer to FIG21 , which shows a schematic diagram of the structure of a communication device 2100 provided in one embodiment of the present application. The communication device 2100 may include: a processor 2101 , a receiver 2102 , a transmitter 2103 , a memory 2104 , and a bus 2105 .

[0454] The processor 2101 includes one or more processing cores. The processor 2101 executes various functional applications and information processing by running software programs and modules.

[0455] Receiver 2102 and transmitter 2103 can be implemented as a communication component, which can be a communication chip. This communication chip can also be called a transceiver. Memory 2104 is connected to processor 2101 via bus 2105. Memory 2104 can be used to store computer programs, and processor 2101 is used to execute the computer programs to implement the various steps in the above method embodiments.

[0456] In addition, the memory 2104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0457] In an exemplary embodiment, when the communication device 2100 is implemented as the terminal device described above, the receiver 2102 and the processor 2101 execute the computer program to cause the communication device to implement the steps performed by the terminal device in the method shown in any one of Figures 15, 17, or 18. In this case, the receiver 2102 may correspondingly implement the method and steps implemented by the receiving module 1901 in Figure 19, and the transmitter 2103 may correspondingly implement the method and steps implemented by the transmitting module 1902 in Figure 19.

[0458] In an exemplary embodiment, when the communication device 2100 is implemented as the aforementioned network device, the transmitter 2103 executes the computer program to cause the communication device to implement the steps performed by the network device in the method shown in any one of Figures 16, 17, or 18. In this case, the transmitter 2103 may correspondingly implement the method and steps implemented by the transmitting module 2001 in Figure 20, and the receiver 2102 may correspondingly implement the method and steps implemented by the receiving module 2002 in Figure 20.

[0459] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is loaded and executed by a processor to implement all or part of the steps performed by the terminal device or network device in the method shown in Figures 15, 16, 17 or 18 above.

[0460] The present application also provides a chip, which is used to run in a communication device so that the communication device executes all or part of the steps performed by the terminal device or network device in the method shown in Figures 15, 16, 17 or 18 above.

[0461] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform all or part of the steps performed by the terminal device or network device in the method shown in Figures 15, 16, 17, or 18 above.

[0462] The present application also provides a computer program, which is executed by a processor of a communication device to implement all or part of the steps performed by a terminal device or a network device in the method shown in Figures 15, 16, 17 or 18 above.

[0463] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0464] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for transmitting control information, It is characterized in that The method is performed by a terminal device, and the method includes: Control information is received, where the control information is used to indicate or schedule the transmission of sidelink information on a sidelink; the sidelink information includes a reference signal used for positioning.

2. The method according to claim 1, It is characterized in that The side information includes: information sent on the PSCCH, and the reference signal; or, Information sent on the PSCCH, the reference signal, and information sent on the PSSCH.

3. The method according to claim 1 or 2, It is characterized in that The control information is downlink control information DCI in a first format, and the first format is a format other than DCI format 3_0 and DCI format 3_1; or, The control information is a DCI in a second format, and the second format is DCI format 3_0 or DCI format 3_1.

4. The method according to claim 3, It is characterized in that The cyclic redundancy check code CRC of the DCI in the first format is scrambled using a radio network temporary identifier RNTI related to positioning.

5. The method according to claim 4, It is characterized in that The positioning-related RNTI includes at least one of the following RNTIs: A first RNTI, used for dynamic scheduling of a sidelink positioning reference signal; A second RNTI is used for scheduling the configuration grant of the sidelink positioning reference signal; And, the third RNTI is used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

6. The method according to any one of claims 3 to 5, It is characterized in that In a case where the sidelink information does not include information sent on the PSSCH, and the control information is a DCI in a first format, the DCI in the first format does not include information on uplink resources for indicating uplink feedback.

7. The method according to any one of claims 3 to 5, It is characterized in that The DCI in the second format includes an information field for indicating uplink resources for uplink feedback.

8. The method according to claim 7, It is characterized in that The method further comprises: In a case where the sidelink information does not include information sent on the PSSCH, at least one of the following information is sent on the uplink resource of the uplink feedback: The first message from the top; second information for indicating whether the sideline information has been sent; And, third information determined by the terminal device itself.

9. The method according to any one of claims 2 to 8, It is characterized in that The method further comprises: Sending first request information; the first request information is information sent to a network device; the first request information indicates whether the sideline information includes information sent on a PSSCH.

10. The method according to claim 9, It is characterized in that The sending of the first request information includes: The first request information is sent when sending a scheduling request SR or a buffer status report BSR.

11. The method according to claim 10, It is characterized in that The first request information is included in the SR or BSR; or, The first request information is information independent of SR or BSR.

12. The method according to any one of claims 3 to 11, It is characterized in that The DCI format of the control information corresponds to the resource pool where the transmission resource of the sidelink information is located.

13. The method according to claim 12, It is characterized in that The resource pool where the transmission resource of the side information is located includes: a dedicated resource pool of the reference signal used for positioning; or, The reference signal is used for positioning, and a shared resource pool for sideline communication.

14. The method according to claim 13, It is characterized in that When the resource pool where the transmission resource of the sideline information is located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resource of the sideline information is located is the shared resource pool, the DCI format of the control information is the first format; or, When the resource pool where the transmission resources of the side information are located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resources of the side information are located is the shared resource pool, the DCI format of the control information is the second format.

15. The method according to any one of claims 3 to 14, It is characterized in that When the length of the DCI in the first format is less than the length of the DCI in the second format, and the control information is the DCI in the first format, padding information is included at the end of the control information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format; or, When the length of the DCI in the first format is greater than the length of the DCI in the second format and the control information is the DCI in the second format, the end of the control information includes padding information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format.

16. The method according to claim 15, It is characterized in that The padding information is bits with a value of zero.

17. The method according to any one of claims 1 to 16, It is characterized in that The control information is used to indicate a resource or a resource set of the reference signal.

18. The method according to claim 17, It is characterized in that The information field of the control information includes at least one of the following information fields: A first information field, used to carry a resource identifier of the reference signal; The second information field is used to carry the offset of the comb structure of the reference signal and the size of the comb structure; The third information field is used to carry the time domain resource indication information of the reference signal; The fourth information field is used to carry frequency domain resource indication information of the reference signal; And, the fifth information field is used to carry the resource element RE offset of the reference signal.

19. The method according to claim 18, It is characterized in that The time domain resource indication information of the reference signal includes at least one of the following information: A starting orthogonal frequency division multiplexing (OFDM) symbol of the reference signal; The number of OFDM symbols of the reference signal.

20. The method according to claim 18 or 19, It is characterized in that The frequency domain resource indication information of the reference signal includes at least one of the following information: The frequency domain resource of the reference signal; The frequency domain resource set of the reference signal.

21. The method according to any one of claims 18 to 20, It is characterized in that The method further comprises: Send sidelink control information SCI; the SCI includes at least one information field among the first information field, the second information field, the third information field, the fourth information field and the fifth information field.

22. The method according to claim 21, It is characterized in that The SCI includes at least one of the following: The first-order SCI carried on PSCCH; Second-order SCI carried on PSSCH.

23. The method according to any one of claims 1 to 22, It is characterized in that The resource of the side information includes at least one of the following resources: Resources in licensed frequency bands; resources on dedicated frequency bands; And, resources in unlicensed frequency bands.

24. A method for transmitting control information, It is characterized in that The method is performed by a network device, and the method includes: Send control information, where the control information is used to indicate or schedule the transmission of sidelink information of a terminal device on a sidelink; the sidelink information includes a reference signal for positioning.

25. The method according to claim 24, It is characterized in that The side information includes: Information sent on PSCCH and the reference signal; or, Information sent on the PSCCH, the reference signal, and information sent on the PSSCH.

26. The method according to claim 24 or 25, It is characterized in that The control information is downlink control information DCI in a first format, and the first format is a format other than DCI format 3_0 and DCI format 3_1; or, The control information is a DCI in a second format, and the second format is DCI format 3_0 or DCI format 3_1.

27. The method according to claim 26, It is characterized in that The cyclic redundancy check code CRC of the DCI in the first format is scrambled using a radio network temporary identifier RNTI related to positioning.

28. The method according to claim 27, It is characterized in that The positioning-related RNTI includes at least one of the following RNTIs: A first RNTI, used for dynamic scheduling of a sidelink positioning reference signal; A second RNTI is used for scheduling the configuration grant of the sidelink positioning reference signal; And, the third RNTI is used for scheduling the sidelink positioning reference signal, the sidelink control channel PSCCH, and the sidelink shared channel PSSCH.

29. The method according to any one of claims 26 to 28, It is characterized in that When the sidelink information does not include information sent on the PSSCH, and the control information is a DCI in a first format, the DCI in the first format does not include an information field for indicating uplink resources for uplink feedback.

30. The method according to any one of claims 26 to 28, It is characterized in that The DCI in the second format includes an information field for indicating uplink resources for uplink feedback.

31. The method according to claim 30, It is characterized in that The method further comprises: In a case where the sidelink information does not include information sent on the PSSCH, at least one of the following information is received on the uplink resource of the uplink feedback: The first information indicated by the high layer to the terminal device; Second information for indicating whether the terminal device has sent the sideline information; And, third information determined by the terminal device itself.

32. A method according to any one of claims 25 to 31, It is characterized in that The method further comprises: receiving first request information; the first request information is information sent by the terminal device; the first request information indicates whether the sideline information includes information sent on the PSSCH; The sending control information includes: The control information is sent according to the first request information.

33. The method according to claim 32, It is characterized in that The receiving of the first request information comprises: When receiving a scheduling request SR or a buffer status report BSR, the first request information is received.

34. The method according to claim 33, It is characterized in that The first request information is included in the SR or BSR; or, The first request information is information independent of SR or BSR.

35. A method according to any one of claims 26 to 34, It is characterized in that The DCI format of the control information corresponds to the resource pool where the transmission resource of the sidelink information is located.

36. The method according to claim 35, It is characterized in that The resource pool where the transmission resource of the side information is located includes: a dedicated resource pool of the reference signal used for positioning; or, The reference signal is used for positioning, and a shared resource pool for sideline communication.

37. The method according to claim 36, It is characterized in that When the resource pool where the transmission resource of the sideline information is located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resource of the sideline information is located is the shared resource pool, the DCI format of the control information is the first format; or, When the resource pool where the transmission resources of the side information are located is the dedicated resource pool, the DCI format of the control information is the first format; when the resource pool where the transmission resources of the side information are located is the shared resource pool, the DCI format of the control information is the second format.

38. The method according to any one of claims 26 to 37, It is characterized in that When the length of the DCI in the first format is less than the length of the DCI in the second format, and the control information is the DCI in the first format, padding information is included at the end of the control information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format; or, When the length of the DCI in the first format is greater than the length of the DCI in the second format and the control information is the DCI in the second format, the end of the control information includes padding information; the length of the padding information is the difference between the length of the DCI in the first format and the length of the DCI in the second format.

39. The method according to claim 38, It is characterized in that The padding information is bits with a value of zero.

40. The method according to any one of claims 24 to 39, It is characterized in that The control information is used to indicate a resource or a resource set of the reference signal.

41. The method according to claim 40, It is characterized in that The information field of the control information includes at least one of the following information fields: A first information field, used to carry a resource identifier of the reference signal; The second information field is used to carry the offset of the comb structure of the reference signal and the size of the comb structure; The third information field is used to carry the time domain resource indication information of the reference signal; The fourth information field is used to carry frequency domain resource indication information of the reference signal; And, the fifth information field is used to carry the resource element RE offset of the reference signal.

42. The method according to claim 41, It is characterized in that The time domain resource indication information of the reference signal includes at least one of the following information: A starting orthogonal frequency division multiplexing (OFDM) symbol of the reference signal; The number of OFDM symbols of the reference signal.

43. The method according to claim 41 or 42, It is characterized in that The frequency domain resource indication information of the reference signal includes at least one of the following information: The frequency domain resource of the reference signal; The frequency domain resource set of the reference signal.

44. A method according to any one of claims 24 to 43, It is characterized in that The resource of the side information includes at least one of the following resources: Resources in licensed frequency bands; resources on dedicated frequency bands; And, resources in unlicensed frequency bands.

45. A device for transmitting control information, It is characterized in that The device comprises: The receiving module is used to receive control information, where the control information is used to indicate or schedule the transmission of sidelink information on the sidelink; the sidelink information includes a reference signal for positioning.

46. ​​A device for transmitting control information, It is characterized in that The device comprises: A sending module is used to send control information, wherein the control information is used to indicate or schedule the transmission of sidelink information of a terminal device on a sidelink; the sidelink information includes a reference signal for positioning.

47. A terminal device, It is characterized in that The terminal device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the terminal device implements the control information transmission method as described in any one of claims 1 to 23 above.

48. A network device, It is characterized in that The terminal device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the network device implements the control information transmission method as described in any one of claims 24 to 44 above.

49. A computer readable storage medium, It is characterized in that The storage medium stores a computer program, and the computer program is used to be executed by a processor of a communication device so that the communication device implements the method for transmitting control information as described in any one of claims 1 to 44.

50. A chip, It is characterized in that The chip includes an integrated circuit and an application program, and the chip is used to run in a communication device so that the communication device executes the control information transmission method as described in any one of claims 1 to 44.

51. A computer program product, It is characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium; the processor of the communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, so that the communication device performs the method for transmitting control information as described in any one of claims 1 to 44.

52. A computer program, It is characterized in that The computer program is executed by a processor of a communication device, so that the communication device implements the method for transmitting control information as claimed in any one of claims 1 to 44.

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