Sidelink periodic reference signal sending method, terminal, and storage medium

Abstract

The present disclosure relates to the technical field of communications, and in particular to a sidelink periodic reference signal sending method, a terminal, and a storage medium. The sidelink periodic reference signal sending method comprises: receiving first information from a second terminal, wherein the first information is used for instructing a first terminal to periodically send a reference signal. The second terminal knows configurations of reference signals sent by a plurality of first terminals connected to the second terminal, and therefore, whether there is overlap or conflict between the reference signals can be determined, and the configurations of the reference signals are determined on the basis of an actual situation, so that the overlap or conflict between the reference signals is avoided, failure of reception of the reference signals due to the second terminal being not able to clearly simulate a receiving beam is avoided, and thus no impact is caused to beam failure detection and beam failure recovery.

Description

Sidelink periodic reference signal transmission method, terminal and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a method, a terminal, and a storage medium for transmitting a sidelink periodic reference signal. Background Art

[0002] The sidelink (SL) communication method can support beam-based reception and transmission. If a receiving end can receive periodic reference signals from multiple transmitting ends, there may be overlap in the periodic reference signal resources, making it impossible for the receiving end to clearly determine which analog receive beam to use.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure propose a sidelink periodic reference signal sending method, terminal, and storage medium to solve the technical problem in related technologies that a receiving end cannot clearly apply which analog receiving beam to use.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for sending a sidelink periodic reference signal is proposed, which is performed by a first terminal. The method includes: receiving first information from a second terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0006] According to a second aspect of an embodiment of the present disclosure, a method for sending a sidelink periodic reference signal is proposed, which is executed by a second terminal. The method includes: sending first information to at least one first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0007] According to a third aspect of an embodiment of the present disclosure, a method for transmitting a sidelink periodic reference signal is proposed, including:

[0008] The second terminal sends first information to the first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal;

[0009] The first terminal determines a configuration of the reference signal based on the first information.

[0010] According to the fourth aspect of an embodiment of the present disclosure, a sidelink periodic reference signal sending device is proposed, the device including: a transceiver module for receiving first information from a second terminal, the first information being used to indicate periodic sending of a reference signal; and a processing module for determining the configuration of the reference signal based on the first information.

[0011] According to the fifth aspect of an embodiment of the present disclosure, a sidelink periodic reference signal sending device is proposed, the device including: a processing module for determining first information corresponding to at least one first terminal, the first information being used to instruct the first terminal to periodically send a reference signal; and a transceiver module for sending the first information to the at least one first terminal.

[0012] According to a sixth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; a memory coupled to the processor, the memory storing executable instructions, wherein the executable instructions, when executed by the processor, enable the terminal to execute the sidelink periodic reference signal sending method described in the first or second aspect above.

[0013] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a second terminal and at least one first terminal, wherein the first terminal is configured to implement the sidelink periodic reference signal sending method described in the first aspect, and the second terminal is configured to implement the sidelink periodic reference signal sending method described in the second aspect.

[0014] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the sidelink periodic reference signal sending method described in the first or second aspect above.

[0015] According to an embodiment of the present disclosure, the first terminal can periodically send a reference signal to the second terminal based on the first information sent by the second terminal. Since the second terminal knows the configuration of the reference signals sent by multiple first terminals connected to it, it can determine whether there is overlap or conflict between the various reference signals, and determine the configuration of each reference signal according to the actual situation, thereby avoiding overlap or conflict between the reference signals, and avoiding the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0018] FIG2 is an interactive schematic diagram illustrating a method for sending a sidelink periodic reference signal according to an embodiment of the present disclosure.

[0019] FIG3A is a schematic flowchart of a method for sending a sidelink periodic reference signal according to an embodiment of the present disclosure.

[0020] FIG3B is a schematic diagram showing resource configuration of a reference signal according to an embodiment of the present disclosure.

[0021] FIG3C is a schematic diagram showing resource configuration of a reference signal according to an embodiment of the present disclosure.

[0022] FIG3D is a schematic diagram showing resource configuration of a reference signal according to an embodiment of the present disclosure.

[0023] FIG4 is a schematic flowchart of a method for sending a sidelink periodic reference signal according to an embodiment of the present disclosure.

[0024] FIG5 is a schematic block diagram showing the device structure of a first terminal according to an embodiment of the present disclosure.

[0025] FIG6 is a schematic block diagram showing the device structure of a second terminal according to an embodiment of the present disclosure.

[0026] FIG7 is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0027] FIG8 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] Embodiments of the present disclosure provide a sidelink periodic reference signal transmission method, a terminal, and a storage medium.

[0029] In a first aspect, an embodiment of the present disclosure proposes a method for sending a sidelink periodic reference signal, which is performed by a first terminal. The method includes: receiving first information from a second terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0030] In the above embodiment, the first terminal can periodically send a reference signal to the second terminal based on the first information sent by the second terminal. Since the second terminal knows the configuration of the reference signals sent by multiple first terminals connected to it, it can determine whether there is overlap or conflict between the reference signals, and determine the configuration of each reference signal according to the actual situation, thereby avoiding overlap or conflict between the reference signals, and avoiding the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0031] In combination with some embodiments of the first aspect. In some embodiments, the first information is used to indicate at least one of the following: whether the reference signal overlaps or conflicts with reference signals sent by other terminals; a first cycle duration; the first cycle duration is the duration of the first cycle for the second terminal to receive the reference signal; a time domain position allocated to the reference signal in the first cycle; an unoccupied time domain position in the first cycle; and a starting position of the time period for the first terminal to send the reference signal in the system frame.

[0032] In combination with some embodiments of the first aspect, in some embodiments, the first cycle duration corresponds to the number of first terminals sending reference signals to the second terminal.

[0033] In conjunction with some embodiments of the first aspect, in some embodiments, the method further comprises:

[0034] Determine at least one of the following configurations of the reference signal based on the first information: determine a second cycle duration corresponding to a second cycle in which the first terminal sends a reference signal; wherein the second cycle duration is M times the first cycle duration, and M is a positive integer greater than 1; determine a time domain position for sending the reference signal in the second cycle; determine a starting position of the time period in a system frame.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the time period includes at least one second period.

[0036] In combination with some embodiments of the first aspect. In some embodiments, determining the time domain position for sending the reference signal in the second period includes: determining a first sub-period among the M sub-periods included in the second period, where the period duration of the sub-period is the first period duration; determining the time domain position for sending the reference signal in the first sub-period as the time domain position for sending the reference signal in the second period; wherein the time domain position for sending the reference signal in the first sub-period corresponds to the time domain position allocated for the reference signal in the first period.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the reference signal is a reference signal used for beam failure detection.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the reference signal is a channel state information reference signal CSI-RS.

[0039] In a second aspect, an embodiment of the present disclosure proposes a method for sending a sidelink periodic reference signal, which is executed by a second terminal. The method includes: sending first information to at least one first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0040] In combination with some embodiments of the second aspect. In some embodiments, the first information is used to indicate at least one of the following: whether the reference signal overlaps or conflicts with reference signals sent by other terminals; a first cycle duration; the first cycle duration is the duration of the first cycle for the second terminal to receive the reference signal; a time domain position allocated to the reference signal in the first cycle; an unoccupied time domain position in the first cycle; and a starting position of the time period for the first terminal to send the reference signal in the system frame.

[0041] In conjunction with some embodiments of the second aspect, in some embodiments, the first cycle duration corresponds to the number of first terminals sending reference signals to the second terminal.

[0042] In a third aspect, a method for sending a sidelink periodic reference signal is proposed, the method comprising: a second terminal sending first information to a first terminal, the first information being used to instruct the first terminal to periodically send a reference signal; the first terminal determining the configuration of the reference signal based on the first information.

[0043] In the fourth aspect, a sidelink periodic reference signal sending device is proposed, which includes: a transceiver module for receiving first information from a second terminal, where the first information is used to indicate the periodic sending of a reference signal; and a processing module for determining the configuration of the reference signal based on the first information.

[0044] In the fifth aspect, a sidelink periodic reference signal sending device is proposed, which includes: a processing module for determining first information corresponding to at least one first terminal, wherein the first information is used to indicate that the first terminal periodically sends a reference signal; and a transceiver module for sending the first information to the at least one first terminal.

[0045] In the sixth aspect, a terminal is proposed, comprising: one or more processors; a memory coupled to the processor, the memory storing executable instructions, wherein the executable instructions, when executed by the processor, enable the terminal to execute the sidelink periodic reference signal sending method described in the optional embodiment of the first or second aspect above.

[0046] In the seventh aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; a memory coupled to the processor, on which executable instructions are stored, wherein when the executable instructions are executed by the processor, the processor calls the executable instructions so that the communication device executes the sidelink periodic reference signal sending method described in the optional embodiment of the first aspect or the second aspect.

[0047] In the eighth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a second terminal and at least one first terminal; wherein the first terminal is configured to execute the method described in the optional embodiment of the first aspect, and the second terminal is configured to execute the method described in the optional embodiment of the second aspect.

[0048] In a ninth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the optional embodiment of the first aspect or the second aspect.

[0049] In a tenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional embodiment of the first aspect or the second aspect.

[0050] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method as described in the first aspect or the optional embodiment of the second aspect.

[0051] It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0052] The present disclosure provides a sidelink periodic reference signal transmission method, terminal, network device, and storage medium. In some embodiments, the terms information transmission method, information reception method, information processing method, and communication method are interchangeable; the terms terminal, network device, information processing device, and communication device are interchangeable; and the terms information processing system and communication system are interchangeable.

[0053] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional embodiments in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional embodiments of other embodiments.

[0054] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0055] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0056] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc.

[0057] For example, when using articles such as “a”, “an”, and “the” in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

[0058] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0059] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0060] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The same applies when there are more branches, such as A, B, and C.

[0061] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0062] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restrictions on the position, order, priority, quantity or content of the description objects. For the statement of the description objects, please refer to the description in the context of the claims or embodiments, and no unnecessary restrictions should be constituted due to the use of prefixes.

[0063] For example, if the description object is "field," the ordinal number preceding "field" in "first field" and "second field" does not restrict the position or order of the "fields." "First" and "second" do not restrict whether the modified "fields" are in the same message, nor do they restrict the order of the "first field" and "second field." For another example, if the description object is "level," the ordinal number preceding "level" in "first level" and "second level" does not restrict the priority of the "levels." For another example, the number of description objects is not restricted by the ordinal number and can be one or more. For example, in the case of "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the description object is "device," "first device" and "second device" can be the same or different devices, and their types can be the same or different. For another example, if the description object is "information," "first information" and "second information" can be the same or different information, and their content can be the same or different.

[0064] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0065] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0066] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0067] In some embodiments, devices and the like can be interpreted as physical or virtual, and their names are not limited to those in the embodiments.

[0068] The recorded names, "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject" and other terms can be used interchangeably.

[0069] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0070] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0071] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0072] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0073] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0074] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0075] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0076] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0077] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0078] As shown in FIG1 , a communication system 100 includes a first terminal 101 and at least one second terminal 102 .

[0079] In some embodiments, the first terminal 101 and the second terminal 102 include, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but are not limited thereto.

[0080] In some embodiments, the communication system 100 may further include a network device, the network device including at least one of the following: an access network device and a core network device. The access network device is, for example, a node or device that connects a terminal to a wireless network, and the access network device may include at least one of an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home nodeB (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open RAN, a cloud RAN, a base station in other communication systems, and an access node in a Wi-Fi system, but is not limited thereto.

[0081] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0082] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0083] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0084] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0085] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0086] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0087] FIG2 is an interactive schematic diagram illustrating a method for sending a sidelink periodic reference signal according to an embodiment of the present disclosure.

[0088] As shown in FIG2 , the sidelink periodic reference signal transmission method includes:

[0089] In step S201 , the second terminal 102 sends first information to the first terminal 101 , where the first information is used to instruct the first terminal to periodically send a reference signal.

[0090] In some embodiments, after establishing a SideLink connection with the first terminal, the second terminal may determine the configuration of the reference signal corresponding to the first terminal, and then send first information to the first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal to the second terminal.

[0091] Step S202: The first terminal 101 determines the configuration of the reference signal based on the first information.

[0092] In some embodiments, after establishing a SideLink connection between the first terminal and the second terminal, the first terminal can receive first information from the second terminal, where the first information is used to instruct the first terminal to periodically send a reference signal to the second terminal. The first terminal can determine the configuration for periodically sending the reference signal based on the first information.

[0093] In some embodiments, after establishing a SideLink connection with multiple first terminals, the second terminal can determine the configuration of the reference signal corresponding to each first terminal according to actual needs, and then send first information to each first terminal respectively. The first information is used to instruct each first terminal to periodically send a reference signal to the second terminal, so that each first terminal determines its corresponding configuration for periodically sending the reference signal based on the received first information.

[0094] In some embodiments, before sending the first information to the first terminal, the second terminal may further determine a configuration for periodically receiving corresponding reference signals from each first terminal, and upon determining that the reference signals periodically sent by multiple first terminals overlap or conflict, send the first information to the corresponding first terminal.

[0095] After receiving the first information, the first terminal may adjust the configuration of the reference signal sent periodically so that the adjusted reference signal no longer overlaps or conflicts.

[0096] In some embodiments, after receiving the first information, the first terminal may re-determine a configuration for periodically transmitting a reference signal based on the first information, and periodically transmit the reference signal to the second terminal using an analog transmit beam corresponding to the second terminal based on the updated configuration. Correspondingly, the second terminal receives the reference signal using an analog receive beam corresponding to the first terminal based on the updated configuration.

[0097] In some embodiments, the reference signal may be a reference signal used for beam failure detection.

[0098] In some embodiments, the reference signal is a channel state information reference signal CSI-RS.

[0099] In some embodiments, the first information may be used to indicate that a reference signal periodically transmitted by the first terminal overlaps or conflicts with a reference signal transmitted by another terminal. After receiving the first information, the first terminal may adjust a configuration of the reference signal periodically transmitted by the first terminal and transmit the adjusted configuration to the second terminal, so that the second terminal updates its configuration for receiving the reference signal of the first terminal according to the adjusted configuration.

[0100] In some embodiments, the first cycle duration corresponds to the number of first terminals sending reference signals to the second terminal.

[0101] In some embodiments, after receiving the first information, the second terminal can also determine at least one of the following configurations of the reference signal based on the first information: determine the second cycle length corresponding to the second cycle for sending the reference signal by the first terminal; wherein the second cycle length is M times the first cycle length, and M is a positive integer greater than 1; determine the time domain position for sending the reference signal in the second cycle; determine the starting position of the time period in the system frame.

[0102] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate that a reference signal periodically sent by the first terminal overlaps or conflicts with a reference signal sent by another terminal.

[0103] After receiving the first information, the first terminal may adjust the configuration of the reference signal periodically sent by the first terminal, and send the adjusted configuration to the second terminal, so that the second terminal updates the configuration of receiving the reference signal of the first terminal according to the adjusted configuration.

[0104] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration; the first cycle duration is the duration of the first cycle for the second terminal to receive a reference signal.

[0105] After receiving the first information, the first terminal may determine, based on the first cycle duration, a second cycle duration corresponding to a second cycle in which the first terminal sends a reference signal.

[0106] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration and unoccupied time domain positions in the first cycle.

[0107] After receiving the first access information, the first terminal can determine the second cycle duration of the second cycle for sending the reference signal by the first terminal based on the received first cycle duration, and based on the unoccupied time domain positions in the first cycle, determine the time domain position for sending the reference signal from the unoccupied time domain positions in the second cycle.

[0108] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration corresponding to a first cycle and a time domain position allocated to the reference signal in the first cycle.

[0109] After receiving the first information, the first terminal can determine the second cycle duration of the second cycle for sending the reference signal by the first terminal based on the received first cycle duration, and determine the time domain position for sending the reference signal in the second cycle based on the time domain position allocated to the reference signal in the first cycle.

[0110] In some embodiments, the first information sent by the second terminal to the at least one first terminal may further be used to indicate a starting position of a time period in which the first terminal periodically sends the reference signal in the system frame. The first terminal may determine, based on the first information, a starting position of a time period in which the first terminal periodically sends the reference signal in the system frame, i.e., determine a boundary of a second period corresponding to the first terminal in the system frame.

[0111] In some embodiments, reference may be made to other optional embodiments described before or after the description corresponding to FIG. 2 .

[0112] In some embodiments, sidelink communication technology can support direct communication between terminals (also known as user equipment (UE)). Sidelink communication is primarily based on omnidirectional antenna transmission and reception. However, in certain frequency bands, such as Frequency Range 2 (FR2), SideLink's omnidirectional antenna reception and transmission coverage is limited. To further enhance UE coverage, SideLink can employ beamforming for reception and transmission.

[0113] The side link may also be referred to as a side link, an edge link, a side link, a secondary link, etc.

[0114] Reference signal transmission in SideLink supports aperiodic configuration. This aperiodic reference signal is not independent and must be sent along with the SideLink data. For beam-based SideLink communications, periodic reference signal configuration can be used to more effectively manage beams and detect beam failures.

[0115] For the beam failure detection process in SideLink, the receiver of the reference signal needs to calculate its reference signal received power (RSRP) on the pre-configured periodic reference signal resources and compare it with the preset threshold. Based on the comparison result, it is determined whether there is a beam failure.

[0116] Since SideLink communication supports direct communication between terminals, unicast connections may be established between multiple terminals. At the same time, in beam-based SideLink transmission, different terminal pairs (UE pairs) use different simulated transmit and receive beams to communicate.

[0117] When a receiving end establishes a connection with multiple transmitting ends, the configuration information carried by the PC5 Radio Resource Control (PC5-RRC) information based on the PC5 interface between the multiple transmitting ends cannot be communicated, such as the configuration information of the periodic reference signal. Therefore, multiple transmitting ends may simultaneously send reference signals in a certain time slot. Correspondingly, for the receiving end, there may be overlap in the reference signal resources in the periodic reference signal configuration information received from multiple transmitting ends. In this case, the receiving end cannot clearly determine which analog receive beam should be used to receive the reference signal.

[0118] Embodiments of the present disclosure provide a method for transmitting a sidelink periodic reference signal. Figure 3A is a schematic flow chart illustrating a method for transmitting a sidelink periodic reference signal according to an embodiment of the present disclosure. The method for transmitting a sidelink periodic reference signal illustrated in this embodiment can be performed by a first terminal, which is a transmitter of a reference signal.

[0119] As shown in FIG3A , the method for sending a sidelink periodic reference signal may include the following steps:

[0120] In step S301, first information is received from a second terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0121] In some embodiments, a SideLink connection may be established between the first terminal and the second terminal, and the first terminal may send a reference signal to the second terminal based on a beam according to a configuration of the reference signal.

[0122] The reference signal may be a reference signal for beam failure detection, for example, a channel state information reference signal (CSI-RS) or a primary synchronization signal (PSS). For simplicity, the following embodiments are described using CSI-RS as an example.

[0123] Furthermore, the reference signal may be a reference signal that is sent aperiodically or a reference signal that is sent periodically. For example, the reference signal may be a CSI-RS that is sent periodically.

[0124] Furthermore, the configuration of the reference signal may be determined in various ways, for example, by one of the following ways: protocol pre-definition; high-layer indication; or carried in the first information sent by the second terminal to the first terminal.

[0125] In some embodiments, after establishing a SideLink connection with a second terminal, the first terminal may first determine the configuration of the SCI-RS to be periodically sent to the second terminal, and may send the CSI-RS configuration to the second terminal through a message such as PC5-RRC or SCI. Based on the configuration, the first terminal may use the simulated transmit beam corresponding to the second terminal to periodically send the CSI-RS to the second terminal. Correspondingly, the second terminal uses the simulated receive beam corresponding to the first terminal based on the received configuration to periodically receive the CSI-RS sent by the first terminal from the first terminal.

[0126] In some embodiments, after establishing a SideLink connection between the first terminal and the second terminal, the first terminal can receive first information from the second terminal, where the first information is used to instruct the first terminal to periodically send CSI-RS to the second terminal. The first terminal can determine the configuration for periodically sending CSI-RS based on the first information.

[0127] If the first information received by the first terminal indicates the configuration of the CSI-RS, the first terminal may periodically transmit the CSI-RS to the second terminal using the simulated transmit beam corresponding to the second terminal based on the CSI-RS configuration indicated by the first information. Correspondingly, the second terminal periodically receives the CSI-RS transmitted by the first terminal from the first terminal using the simulated receive beam corresponding to the first terminal.

[0128] If the first information received by the first terminal does not indicate the configuration of the CSI-RS, the first terminal may autonomously determine the configuration of the CSI-RS and then send the CSI-RS configuration to the second terminal. Then, the first terminal may periodically send the CSI-RS to the second terminal based on the configuration using the simulated transmit beam corresponding to the second terminal. Correspondingly, the second terminal periodically receives the CSI-RS sent by the first terminal from the first terminal using the simulated receive beam corresponding to the first terminal based on the received configuration.

[0129] In some embodiments, after establishing a SideLink connection with a first terminal, the second terminal may determine the configuration of the CSI-RS corresponding to the first terminal, and then send first information to the first terminal, where the first information is used to instruct the first terminal to periodically send the CSI-RS to the second terminal. The first terminal determines the configuration for periodically sending the CSI-RS to the second terminal based on the receipt of the first information, and uses the simulated transmit beam corresponding to the second terminal to periodically send the CSI-RS to the second terminal based on the configuration. The second terminal then uses the simulated receive beam corresponding to the first terminal to periodically receive the CSI-RS sent by the first terminal from the first terminal based on the configuration.

[0130] In some embodiments, after establishing SideLink connections with multiple first terminals, the second terminal can first determine the configuration of the CSI-RS corresponding to each first terminal according to actual needs, such as determining the resources of the CSI-RS corresponding to each first terminal, and then send first information to each first terminal respectively. The first information is used to instruct each first terminal to periodically send CSI-RS to the second terminal, so that each first terminal determines its corresponding configuration for periodic CSI-RS transmission based on the received first information. Each first terminal can use the simulated transmission beam corresponding to the second terminal to periodically send CSI-RS to the second terminal based on the configuration of periodic CSI-RS transmission. Correspondingly, the second terminal can use the simulated reception beam corresponding to each first terminal to periodically receive the corresponding CSI-RS from each first terminal.

[0131] In some embodiments, after establishing SideLink connections with multiple first terminals, the second terminal may determine a configuration for periodically receiving a corresponding CSI-RS from each first terminal, and based on the configuration of the CSI-RS corresponding to each first terminal, use a simulated receive beam corresponding to each first terminal to receive the CSI-RS from each first terminal. The configuration of the CSI-RS corresponding to each first terminal may be indicated by a higher layer of the second terminal, or may be indicated separately by each first terminal.

[0132] Because the first terminal cannot understand the configuration of the periodic CSI-RS transmission of other first terminals, when the second terminal receives the CSI-RS corresponding to each first terminal, there may be overlap or conflict between multiple CSI-RSs, for example, the resources occupied by multiple CSI-RSs overlap or conflict. As shown in Figure 3B, the multiple first terminals connected to the second terminal include UE1, UE2, and UE3. The second terminal receives the configuration of the CSI-RS periodically transmitted by UE1, UE2, and UE3 respectively; among which, the CSI-RS corresponding to UE1 occupies time slots S1, S4, and S7; the CSI-RS corresponding to UE2 occupies time slots S1, S3, S5, and S7; and the CSI-RS corresponding to UE3 occupies time slots S2, S4, S6, and S8. It can be seen that in time slot S1, the CSI-RS corresponding to UE1 and UE2 conflict, in time slot S4, the CSI-RS corresponding to UE1 and UE3 conflict, and in time slot S7, the CSI-RS corresponding to UE1 and UE2 conflict.

[0133] When the second terminal determines that CSI-RS signals periodically transmitted by multiple first terminals overlap or conflict, the second terminal may send first information to the corresponding first terminal, wherein the first information is used to instruct the first terminal to adjust the configuration of the periodically transmitted CSI-RS signals. After receiving the first information, the first terminal may adjust the configuration of the periodically transmitted CSI-RS signals so that the adjusted reference signals no longer overlap or conflict.

[0134] After receiving the first information, the first terminal may re-determine a configuration for periodically transmitting a reference signal based on the first information, and periodically transmit the reference signal to the second terminal using the simulated transmit beam corresponding to the second terminal based on the updated configuration. Correspondingly, the second terminal receives the reference signal using the simulated receive beam corresponding to the first terminal based on the updated configuration.

[0135] It can be seen from the technical solution of the above embodiment that the first terminal can periodically send a reference signal to the second terminal based on the first information sent by the second terminal. Since the second terminal has mastered the configuration of the reference signals sent by multiple first terminals connected to it, it can determine whether there is overlap or conflict between the reference signals, and determine the configuration of each reference signal according to the actual situation, so as to avoid overlap or conflict between the reference signals, and avoid the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0136] In some embodiments, after establishing a SideLink connection with a first terminal, a second terminal may determine a configuration of a reference signal periodically transmitted with the first terminal, where the reference signal configuration may include resources used by the second terminal to receive the reference signal periodically transmitted by the first terminal. If the second terminal determines that the resources of the reference signal periodically transmitted by the first terminal overlap or conflict with resources of reference signals transmitted by other terminals, the second terminal may send first information to the first terminal.

[0137] The first information may be used to instruct the first terminal to adjust the configuration of a periodically sent reference signal.

[0138] After receiving the first information from the second terminal, the first terminal may adjust a configuration of a periodically transmitted reference signal based on the first information, and periodically transmit the reference signal using an analog transmit beam corresponding to the second terminal based on the adjusted configuration. The second terminal may receive the reference signal using an analog receive beam corresponding to the first terminal based on the adjusted configuration.

[0139] In some embodiments, the first information can be used to indicate at least one of the following: overlap or conflict between the reference signal and the reference signals sent by other terminals; the first cycle length corresponding to the first cycle; the time domain position allocated to the reference signal in the first cycle; the unoccupied time domain position in the first cycle; the starting position of the time period in the system frame for the first terminal to send the reference signal.

[0140] The first period may be a reception period used by the second terminal when periodically receiving a reference signal from at least one first terminal. The second terminal may allocate corresponding time domain resources to the reference signal sent by each first terminal within the first period, and use the analog reception beam corresponding to the first terminal in the time domain resources corresponding to the reference signal sent by a first terminal to receive the reference signal sent by the first terminal. For example, a time slot may be allocated to each first terminal within the first period, and the reference signal sent by the first terminal may be received in the time slot corresponding to each first terminal in the first period using the analog reception beam corresponding to the first terminal.

[0141] The first cycle duration may represent the duration of the receiving cycle adopted by the second terminal when receiving the reference signal; the time domain position allocated to the reference signal in the first cycle may be used to indicate the time domain resources allocated to the reference signal sent by the first terminal in the first cycle; the unoccupied time domain positions in the first cycle may be used to indicate the unallocated time domain resources in the first cycle, that is, to indicate the candidate time domain resources that the first terminal may use to send the reference signal in the first cycle, and the first terminal may determine the time domain resources for sending the reference signal from the candidate time domain resources.

[0142] Furthermore, the first cycle duration can be determined based on the relevant configuration of the second terminal. For example, the first cycle duration can correspond to the number of first terminals that send reference signals to the second terminal. In one embodiment, the time domain resources contained in the first cycle at least need to be able to allocate one time domain resource to each first terminal, that is, the number of time domain resources occupied by the first cycle duration can be greater than or equal to the number of first terminals. For example, if the number of first terminals that periodically send reference signals to the second terminal is N, the first cycle duration corresponding to the first cycle can be N time slots. The second terminal can allocate a time slot to each first terminal within the first cycle, and use the analog receiving beam corresponding to each first terminal to receive the corresponding reference signal in the time slot corresponding to each first terminal in turn.

[0143] The first cycle duration indicated by the first information can be used by the first terminal to determine the second cycle duration corresponding to the second cycle used by the first terminal to transmit a reference signal. The second cycle can be considered the transmission cycle used by the first terminal to transmit the reference signal. That is, the first terminal periodically transmits the reference signal to the first terminal based on the second cycle. The second cycle duration can be M times the first cycle duration, where M is a positive integer greater than or equal to 1. If M is equal to 1, the first terminal transmits the reference signal using the same second cycle duration as the first cycle duration corresponding to the first cycle. If M is greater than 1, the first terminal transmits the reference signal using a second cycle duration that is an integer multiple of the first cycle duration corresponding to the first cycle. For example, if the first cycle duration corresponding to the first cycle is N time slots, the second cycle duration corresponding to the second cycle is N*M time slots. The value of M can be set based on the actual needs of the first terminal. Furthermore, the above information indicated by the first information can be sent in the same message or in different messages, which is not specifically limited here.

[0144] In some embodiments, a first terminal may receive first information from a second terminal, where the first information may be used to indicate that a reference signal periodically transmitted by the first terminal overlaps or conflicts with a reference signal transmitted by another terminal. After receiving the first information, the first terminal may adjust a configuration of the reference signal periodically transmitted by the first terminal, and transmit the adjusted configuration to the second terminal, so that the second terminal updates a configuration for receiving the reference signal of the first terminal according to the adjusted configuration.

[0145] The first terminal periodically sends a reference signal to the second terminal using the simulated transmit beam corresponding to the second terminal based on the adjusted configuration. Correspondingly, the second terminal receives the reference signal using the simulated receive beam corresponding to the first terminal based on the adjusted configuration.

[0146] Furthermore, after receiving the adjusted configuration sent by the first terminal, the second terminal can also re-determine whether the reference signal sent by the first terminal still overlaps or conflicts with the reference signals sent by other terminals based on the adjusted configuration; if there is still overlap or conflict, the second terminal can send the first information to the first terminal again to enable the first terminal to adjust the configuration of the reference signal again until the reference signal no longer overlaps or conflicts with the reference signals sent by other terminals; if there is no overlap or conflict, the second terminal can choose to send or not send the configuration determination information to the first terminal.

[0147] It can be seen from the above embodiments that the first terminal can adjust the configuration of periodically sending the reference signal after receiving the first information indicating that the reference signal overlaps or conflicts from the second terminal, thereby avoiding overlap or conflict with the reference signals sent by other terminals, and avoiding the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0148] In some embodiments, the first terminal may receive first information from the second terminal, where the first information may be used to indicate a first cycle duration; the first cycle duration is the duration of a first cycle for the second terminal to receive a reference signal.

[0149] After receiving the first information, the first terminal can determine the second cycle duration corresponding to the second cycle used by the first terminal to send the reference signal based on the first cycle duration, wherein the second cycle duration corresponding to the second cycle can be M times the first cycle duration, and M is a positive integer greater than or equal to 1.

[0150] Furthermore, if the duration of the second cycle is equal to the duration of M first cycles and M is greater than 1, then the second cycle can be considered to include M sub-cycles, each sub-cycle having a duration equal to the duration of the first cycle, and the first terminal can determine at least one first sub-cycle from the M sub-cycles for sending a reference signal, that is, the first terminal can send a reference signal in the first sub-cycle of the second cycle, but not in other sub-cycles. For example, if M=3, the second cycle in which the first terminal periodically sends a reference signal can include three sub-cycles. If the first terminal determines the second sub-cycle of the three sub-cycles as the first sub-cycle, the first terminal sends a reference signal in the second sub-cycle of each second cycle.

[0151] Furthermore, if the first terminal determines to send a reference signal to the second terminal in a first sub-period of each second period, the interval between each reference signal is the duration of the second period; if the first terminal determines to send a reference signal to the second terminal in multiple first sub-periods of each second period, the interval between two adjacent reference signals is an integer multiple of the duration of the first period. Accordingly, the second terminal can receive the reference signal sent by the first terminal using the analog receive beam corresponding to the first terminal at a fixed time domain position in each first period.

[0152] It can be seen from the above embodiments that the first terminal can flexibly adjust the second cycle duration corresponding to the second cycle of sending the reference signal by receiving the first cycle duration from the second terminal, and adjust the frequency of sending the reference signal, so as to avoid overlap or conflict with reference signals sent by other terminals, and avoid failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0153] In some embodiments, the first terminal may receive first information from the second terminal, where the first information may be used to indicate a first cycle duration and an unoccupied time domain position in the first cycle. After receiving the first information, the first terminal may determine, based on the received first cycle duration, a second cycle duration of a second cycle in which the first terminal transmits a reference signal, and, based on the unoccupied time domain position in the first cycle, determine candidate time domain resources that can be used for transmitting the reference signal from the second cycle, thereby selecting a time domain resource for transmitting the reference signal from the candidate time domain resources, and further determining a time domain position for transmitting the reference signal in the second cycle.

[0154] Furthermore, if the duration of the second cycle is equal to the duration of M first cycles, then the second cycle can be considered to include M subcycles, each subcycle having a cycle duration equal to the duration of the first cycle. The first terminal can determine at least one first subcycle from the M subcycles for sending a reference signal, and determine candidate time domain resources that can be used for sending the reference signal in the first subcycle based on unoccupied time domain positions in the first cycle, determine the time domain resources for sending the reference signal from the candidate time domain resources that can be used for sending the reference signal in the first subcycle, and then determine the time domain position for sending the reference signal. The first terminal can send a reference signal to the second terminal using an analog transmit beam corresponding to the second terminal at the time domain position determined in the first subcycle of each second cycle.

[0155] Furthermore, the first terminal can send the adjusted configuration of the reference signal to the second terminal, so that the second terminal determines the time domain position allocated to the reference signal corresponding to the first terminal in the first period based on the adjusted configuration, and uses the analog receiving beam corresponding to the first terminal to periodically receive the reference signal sent by the first terminal at this time domain position in each first period.

[0156] In some embodiments, the first information received by the first terminal from the second terminal may include a resource indication for indicating adjustment of the configuration of the reference signal, which may be referred to as an adjustment indication or an adjustment codebook, and may be represented by a bitmap, for example; wherein the length of the resource indication may be used to indicate that the first period corresponds to the first period duration, for example, if the length of the resource indication is N bits, it indicates that the first period duration is N time slots, and each bit corresponds to one time slot in the N time slots; the indication content of the resource indication may be used to indicate an unoccupied time domain in the first period, for example, a bit assigned a value of 1 or 0 may be used to indicate an unoccupied time domain position in the first period.

[0157] For example, if the resource indication received by the first terminal from the second terminal is 011, it means that the first cycle duration is 3 time slots, and the first time slot corresponding to the bit of 0 in each first cycle is an unoccupied time slot. The first terminal can determine that the second cycle duration corresponding to the second cycle for periodically sending CSI-RS is 3M time slots. The first terminal can determine the first sub-cycle from the M sub-cycles and determine the first time slot in the first sub-cycle as the time slot for sending CSI-RS. The first terminal can use the analog transmit beam corresponding to the second terminal in the first time slot of the first sub-cycle of each second cycle to send a reference signal to the second terminal. Accordingly, the second terminal can use the analog receive beam corresponding to the first terminal in the first time slot of each first cycle to periodically receive the reference signal sent by the first terminal.

[0158] It can be seen from the above embodiments that the first terminal can flexibly adjust the configuration of sending the reference signal by receiving the first cycle duration and the unoccupied time domain position in the first cycle from the second terminal, thereby avoiding overlap or conflict with the reference signals sent by other terminals, and avoiding the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0159] In some embodiments, a first terminal may receive first information from a second terminal, where the first information may be used to indicate a first cycle duration corresponding to a first cycle and a time domain position allocated for the reference signal in the first cycle. After receiving the first information, the first terminal may determine, based on the received first cycle duration, a second cycle duration of a second cycle in which the first terminal transmits the reference signal, and determine, based on the time domain position allocated for the reference signal in the first cycle, a time domain position for transmitting the reference signal in the second cycle.

[0160] Further, if the duration of the second cycle is the duration of M first cycles, it can be considered that the second cycle includes M sub-cycles, and the cycle length of each sub-cycle is the duration of the first cycle. The first terminal can determine at least one first sub-cycle from the M sub-cycles for sending a reference signal, and based on the time domain position allocated to the reference signal in the first cycle, determine the time domain position for sending the reference signal in the first sub-cycle as the time domain position for sending the reference signal in the second cycle; wherein, the time domain position for sending the reference signal in the first sub-cycle corresponds to the time domain position allocated to the reference signal in the first cycle.

[0161] Furthermore, if the second terminal establishes connections with multiple first terminals, the second terminal allocates different time domain positions to reference signals corresponding to different first terminals in the first period.

[0162] In some embodiments, the first information received by the first terminal from the second terminal may include a resource indication for indicating adjustment of the configuration of the reference signal, which may be referred to as an adjustment indication or an adjustment codebook; wherein the length of the resource indication may be used to indicate that the first cycle corresponds to the first cycle duration, for example, if the length of the resource indication is N bits, it indicates that the first cycle duration is N time slots, and each bit corresponds to one time slot of the N time slots; the indication content of the resource indication may be used to indicate the time domain position allocated for the reference signal in the first cycle, for example, a bit assigned a value of 1 or 0 may be used to indicate the time domain position allocated for the reference signal in the first cycle. If a bit assigned a value of 1 indicates the time domain position allocated for the reference signal in the first cycle, then the N bits of the resource indication may include only one bit assigned a value of 1, with the other bits being all 0, and the time slot allocated for the reference signal in the N time slots of the first cycle is indicated by the position of the bit assigned a value of 1 in the N bits.

[0163] For example, if the resource indication received by the first terminal from the second terminal is 001, it means that the first cycle duration is 3 time slots, and the third time slot corresponding to the bit of 1 in each first cycle is the time slot allocated for the reference signal. The first terminal can determine that the second cycle duration corresponding to the second cycle for periodically sending CSI-RS is 3M time slots. The first terminal can determine the first sub-cycle from the M sub-cycles and determine the third time slot in the first sub-cycle as the time slot for sending CSI-RS. The first terminal can use the analog transmit beam corresponding to the second terminal to send a reference signal to the second terminal in the third time slot of the first sub-cycle of each second cycle. Accordingly, the second terminal can use the analog receive beam corresponding to the first terminal in the third time slot of each first cycle to periodically receive the reference signal sent by the first terminal.

[0164] It can be seen from the above embodiments that the first terminal can flexibly adjust the configuration of sending the reference signal by receiving the first cycle duration and the time domain position allocated to the reference signal in the first cycle from the second terminal, thereby avoiding overlap or conflict with the reference signals sent by other terminals, and avoiding the failure of reference signal reception due to the inability of the second terminal to clearly simulate the receiving beam, and thus will not have any impact on beam failure detection and beam failure recovery.

[0165] In some embodiments, the periodic transmission of reference information by the first terminal refers to periodically transmitting a reference signal to the second terminal within a preset time period. Correspondingly, the periodic reception of the reference signal by the second terminal also refers to periodically receiving a reference signal from each first terminal within the preset time period. The preset time period may include at least one second period, and the first terminal may periodically transmit a reference signal to the second terminal based on the second period within the preset time period. In order to ensure that the boundaries of the second periods of different first terminals are aligned, that is, to ensure that different first terminals can start timing the second periods at the same time, the first information received by the first terminal from the second terminal may also be used to indicate the starting position of the time period for the first terminal to periodically transmit the reference signal in the system frame, that is, the starting position for starting to time the second period in the system frame. The first terminal may determine the starting position of the time period for the first terminal to periodically transmit the reference signal in the system frame based on the first information, that is, determine the boundary of the second period corresponding to the first terminal in the system frame.

[0166] Furthermore, the starting position may be represented by a time slot offset.

[0167] Furthermore, the time periods in which different first terminals periodically send reference signals have the same starting position in the system frame.

[0168] It can be seen from the above embodiments that the first terminal can align the boundary of the second period corresponding to the first terminal in the system frame by receiving the starting position of the time period in which the first terminal periodically sends the reference signal from the second terminal, thereby avoiding overlap or conflict of reference signals caused by misaligned boundaries.

[0169] In some embodiments, for the second terminal, the second terminal determines the configuration of the CSI-RS periodically sent by each first terminal connected to it according to the high-level configuration, determines the CSI-RS that may overlap based on the time domain resources occupied by each CSI-RS, and sends first information to the corresponding first terminal, where the first information includes a resource indication for adjusting the configuration of the CSI-RS.

[0170] Wherein, if the number of first terminals establishing a connection with the second terminal is N, the length of the resource indication is N bits, which is used to indicate that the first cycle duration corresponding to the first cycle is N time slots, and each bit in the resource indication is used to indicate a corresponding time slot;

[0171] The N-bit resource indication sent by the second terminal to different first terminals includes only one bit that is 1, and the remaining N-1 bits are 0; the position of the bit that is 1 in the resource indication indicates the time slot in which the first terminal sends the reference signal among the N time slots of the first period;

[0172] The bits that are 1 in the resource indication sent by the second terminal to different terminals are at different bit positions in the resource indication, indicating that the resource indication is sent in different time slots within the N time slots.

[0173] In order to align the boundaries of the time periods in which different first terminals send CSI-RS, the first information sent by the second terminal to the first terminal may further include the time slot offset of the time period in which the first terminal periodically sends CSI-RS in the system frame.

[0174] Different first terminals periodically send CSI-RS in different time slots within the N time slots of the first period, but if N time slots are used as the second period for sending CSI-RS, the overall time slot offset of the second period in the system frame is the same for different first terminals.

[0175] In some embodiments, for a first terminal, the first terminal receives first information sent by a second terminal, where the first information includes a resource indication for adjusting the configuration of the CSI-RS and a time slot offset of a time period for periodically transmitting the CSI-RS by the first terminal in a system frame. The first terminal can flexibly adjust the configuration of the periodically transmitted CSI-RS based on its own configuration information.

[0176] Different first terminals may determine the overall time slot offset of the second period for sending the CSI-RS in the system frame according to the time slot offset in the system frame, and determine the time slot position for sending the CSI-RS in the second period according to the resource indication;

[0177] If the length of the received resource indication is N bits, the second cycle duration N1 corresponding to the second cycle configured by the first terminal is an integer multiple M of N time slots: N1 = N*M, where M is a positive integer. The first terminal can flexibly determine the value of M based on the current resource configuration.

[0178] For example, if the length of the resource indication is N=3, the length of the first cycle is determined to be 3 time slots;

[0179] The first terminals that establish a connection with the second terminal include UE1, UE2, and UE3. The resource indication carried in the first information received by each first terminal from the second terminal is shown in the following Table 1:

[0180] Table 1

[0181] The first terminal UE1 determines, based on the current time-frequency domain resource configuration of the first terminal UE1, that the second cycle duration N11 corresponding to the second cycle for sending the CSI-RS is equal to the first cycle duration: N11=N*M=3*1=3;

[0182] According to the resource indication 100 sent to the first terminal UE1, it is determined that the first terminal UE1 can send the CSI-RS in the first time slot of each second period.

[0183] The first terminal UE2 determines, based on the current time-frequency domain resource configuration of the first terminal UE1, that the second cycle duration N12 corresponding to the second cycle of sending the CSI-RS is equal to the first cycle duration: N12=N*M=3*1=3;

[0184] According to the resource indication 001 sent to the first terminal UE2, it is determined that the first terminal UE1 can send the CSI-RS in the third time slot of each second period.

[0185] The first terminal UE3 determines, based on the current time-frequency domain resource configuration of the first terminal UE3, that the second cycle duration N13 corresponding to the second cycle of sending the CSI-RS is equal to twice the first cycle duration: N13 = N*M = 3*2 = 6;

[0186] According to the resource indication 010 sent to the first terminal UE3, it is determined that the CSI-RS is sent in the second time slot of the sub-cycle composed of the first three time slots of the second cycle.

[0187] The time slot offset of the second period corresponding to UE1, UE2 and UE3 based on the system frame boundary can be determined according to the value of the time slot offset reported by the second terminal.

[0188] Figure 3C shows a resource diagram of the CSI-RS periodically transmitted by different first terminals after adjustment based on the received resource indication. As shown in Figure 3C, the first terminals UE1, UE2, and UE3 all start timing the corresponding second period at the same time slot offset position from the start of the system frame, and respectively transmit CSI-RS based on the corresponding second period. Among them, for UE1, after starting to time the second period, the CSI-RS is transmitted in the first time slot of every three time slots; for UE2, after starting to time the second period, the CSI-RS is transmitted in the third time slot of every three time slots; for UE3, after starting to time the second period, the CSI-RS is transmitted in the second time slot of every six time slots.

[0189] For another example, if the length of the resource indication is N=4, the length of the first cycle is determined to be 4 time slots;

[0190] The first terminals that establish a connection with the second terminal include UE1, UE2, UE3, and UE4. The resource indication carried in the first information received by each first terminal from the second terminal is shown in Table 2 below:

[0191] Table 2

[0192] The first terminal UE1 determines, based on the current time-frequency domain resource configuration of the first terminal UE1, that the second cycle duration N21 corresponding to the second cycle for sending the CSI-RS is equal to the first cycle duration: N21=N*M=4*1=4;

[0193] According to the resource indication 1000 sent to the first terminal UE1, it is determined that the first terminal UE1 can send the CSI-RS in the first time slot of each second period.

[0194] The first terminal UE2 determines, based on the current time-frequency domain resource configuration of the first terminal UE2, that the second cycle duration N22 corresponding to the second cycle for sending the CSI-RS is equal to the first cycle duration: N22=N*M=4*1=4;

[0195] According to the resource indication 0010 sent to the first terminal UE2, it is determined that the first terminal UE1 can send the CSI-RS in the third time slot of each second period.

[0196] The first terminal UE3 determines, based on the current time-frequency domain resource configuration of the first terminal UE3, that the second cycle duration N23 corresponding to the second cycle of sending the CSI-RS is equal to twice the first cycle duration: N23 = N*M = 4*2 = 8;

[0197] According to the resource indication 0100 sent to the first terminal UE3, it is determined that the CSI-RS is sent in the second time slot of the sub-cycle composed of the first 4 time slots of the second cycle.

[0198] The first terminal UE4 determines, based on the current time-frequency domain resource configuration of the first terminal UE4, that the second cycle duration N24 corresponding to the second cycle of sending the CSI-RS is equal to twice the first cycle duration: N24=N*M=4*2=8;

[0199] According to the resource indication 0001 sent to the first terminal UE3, it is determined that the CSI-RS is sent in the 4th time slot in the sub-cycle consisting of the last 4 time slots of the second cycle.

[0200] The time slot offset of the second period corresponding to UE1, UE2, UE3 and UE4 based on the system frame boundary can be determined according to the time slot offset value reported by the second terminal.

[0201] Figure 3D shows a schematic diagram of the resources of the CSI-RS periodically sent by different first terminals after adjustment based on the received resource indication. As shown in Figure 3D, the first terminals UE1, UE2, UE3 and UE4 all start timing the corresponding second period at the same time slot offset position from the start of the system frame, and respectively send CSI-RS based on the corresponding second period. Among them, for UE1, after starting to time the second period, the CSI-RS is sent in the first time slot of every four time slots; for UE2, after starting to time the second period, the CSI-RS is sent in the third time slot of every four time slots; for UE3, after starting to time the second period, the CSI-RS is sent in the second time slot of every eight time slots; for UE4, after starting to time the second period, the CSI-RS is sent in the eighth time slot of every eight time slots.

[0202] In some embodiments, after establishing SideLink connections with multiple first terminals, the second terminal may periodically check whether periodically received reference signals overlap or conflict; or, after establishing a SideLink connection with a new first terminal, check whether the reference signal corresponding to the new first terminal overlaps or conflicts with reference signals corresponding to other first terminals. If the second terminal determines that the reference signals overlap or conflict, it may send first information to each first terminal, or send first information to the first terminal corresponding to the overlapping or conflicting reference signal, to reconfigure the periodically transmitted reference signals of each first terminal so that the reference signals no longer overlap or conflict.

[0203] It should be noted that the embodiments shown in Figures 3A-3D can be implemented independently or in combination with at least one other embodiment in the present disclosure. The specific selection can be made as needed and the present disclosure does not limit it.

[0204] In a second aspect, embodiments of the present disclosure provide a method for transmitting a sidelink periodic reference signal. Figure 4 is a schematic flow chart illustrating a method for transmitting a sidelink periodic reference signal according to an embodiment of the present disclosure. The method for transmitting a sidelink periodic reference signal illustrated in this embodiment can be performed by a second terminal.

[0205] As shown in FIG4 , the method for sending a sidelink periodic reference signal may include the following steps:

[0206] In step S401, first information is sent to at least one first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal.

[0207] In some embodiments, after establishing a SideLink connection with a first terminal, the second terminal may determine the configuration of the CSI-RS corresponding to the first terminal, and then send first information to the first terminal, where the first information is used to instruct the first terminal to periodically send the CSI-RS to the second terminal. The first terminal determines the configuration for periodically sending the CSI-RS to the second terminal based on the receipt of the first information, and uses the simulated transmit beam corresponding to the second terminal to periodically send the CSI-RS to the second terminal based on the configuration. The second terminal then uses the simulated receive beam corresponding to the first terminal to periodically receive the CSI-RS sent by the first terminal from the first terminal based on the configuration.

[0208] Furthermore, the reference signal may be a reference signal that is sent aperiodically or a reference signal that is sent periodically. For example, the reference signal may be a CSI-RS that is sent periodically.

[0209] In some embodiments, after establishing SideLink connections with multiple first terminals, the second terminal can first determine the configuration of the CSI-RS corresponding to each first terminal according to actual needs, such as determining the resources of the CSI-RS corresponding to each first terminal, and then send first information to each first terminal respectively. The first information is used to instruct each first terminal to periodically send CSI-RS to the second terminal, so that each first terminal determines its corresponding configuration for periodic CSI-RS transmission based on the received first information. Each first terminal can use the simulated transmission beam corresponding to the second terminal to periodically send CSI-RS to the second terminal based on the configuration of periodic CSI-RS transmission. Correspondingly, the second terminal can use the simulated reception beam corresponding to each first terminal to periodically receive the corresponding CSI-RS from each first terminal.

[0210] In some embodiments, after establishing SideLink connections with multiple first terminals, the second terminal may determine a configuration for periodically receiving a corresponding CSI-RS from each first terminal, and based on the configuration of the CSI-RS corresponding to each first terminal, use a simulated receive beam corresponding to each first terminal to receive the CSI-RS from each first terminal. The configuration of the CSI-RS corresponding to each first terminal may be indicated by a higher layer of the second terminal, or may be indicated separately by each first terminal.

[0211] When the second terminal determines that CSI-RS signals periodically transmitted by multiple first terminals overlap or conflict, the second terminal may send first information to the corresponding first terminal, wherein the first information is used to instruct the first terminal to adjust the configuration of the periodically transmitted CSI-RS signals. After receiving the first information, the first terminal may adjust the configuration of the periodically transmitted CSI-RS signals so that the adjusted reference signals no longer overlap or conflict.

[0212] After receiving the first information, the first terminal may re-determine a configuration for periodically transmitting a reference signal based on the first information, and periodically transmit the reference signal to the second terminal using the simulated transmit beam corresponding to the second terminal based on the updated configuration. Correspondingly, the second terminal receives the reference signal using the simulated receive beam corresponding to the first terminal based on the updated configuration.

[0213] In some embodiments, after establishing a SideLink connection with a first terminal, a second terminal may determine a configuration of a reference signal periodically transmitted with the first terminal, where the reference signal configuration may include resources used by the second terminal to receive the reference signal periodically transmitted by the first terminal. If the second terminal determines that the resources of the reference signal periodically transmitted by the first terminal overlap or conflict with resources of reference signals transmitted by other terminals, the second terminal may send first information to the first terminal.

[0214] The first information may be used to instruct the first terminal to adjust the configuration of a periodically sent reference signal.

[0215] After receiving the first information from the second terminal, the first terminal may adjust a configuration of a periodically transmitted reference signal based on the first information, and periodically transmit the reference signal using an analog transmit beam corresponding to the second terminal based on the adjusted configuration. The second terminal may receive the reference signal using an analog receive beam corresponding to the first terminal based on the adjusted configuration.

[0216] In some embodiments, the first information is used to indicate at least one of the following: overlap or conflict between the reference signal and the reference signal sent by other terminals; the first cycle duration; the first cycle duration is the duration of the first cycle for the second terminal to receive the reference signal; the time domain position allocated to the reference signal in the first cycle; the time domain position that is not occupied in the first cycle; the starting position of the time period for the first terminal to send the reference signal in the system frame.

[0217] Furthermore, the above information indicated by the first information may be sent by the same message, or may be sent by different messages, which is not specifically limited here.

[0218] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate that a reference signal periodically sent by the first terminal overlaps or conflicts with a reference signal sent by another terminal.

[0219] After receiving the first information, the first terminal may adjust the configuration of the reference signal periodically sent by the first terminal, and send the adjusted configuration to the second terminal, so that the second terminal updates the configuration of receiving the reference signal of the first terminal according to the adjusted configuration.

[0220] The first terminal periodically sends a reference signal to the second terminal using the simulated transmit beam corresponding to the second terminal based on the adjusted configuration. Correspondingly, the second terminal receives the reference signal using the simulated receive beam corresponding to the first terminal based on the adjusted configuration.

[0221] Furthermore, after receiving the adjusted configuration sent by the first terminal, the second terminal can also re-determine whether the reference signal sent by the first terminal still overlaps or conflicts with the reference signals sent by other terminals based on the adjusted configuration; if there is still overlap or conflict, the second terminal can send the first information to the first terminal again to enable the first terminal to adjust the configuration of the reference signal again until the reference signal no longer overlaps or conflicts with the reference signals sent by other terminals; if there is no overlap or conflict, the second terminal can choose to send or not send the configuration determination information to the first terminal.

[0222] In some embodiments, a second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration; the first cycle duration is the duration of a first cycle for receiving a reference signal by the second terminal. The first cycle duration may be determined based on a configuration of the second terminal. For example, the first cycle duration may correspond to the number of first terminals that transmit reference signals to the second terminal, and the number of time domain resources occupied by the first cycle duration needs to be greater than or equal to the number of terminals that periodically transmit reference signals to the second terminal.

[0223] After receiving the first information, the first terminal can determine the second cycle duration corresponding to the second cycle for sending the reference signal by the first terminal based on the first cycle duration, wherein the second cycle duration corresponding to the second cycle can be M times the first cycle duration, and M is a positive integer greater than 1.

[0224] Furthermore, if the duration of the second cycle is the duration of M first cycles, it can be considered that the second cycle includes M sub-cycles, the cycle length of each sub-cycle is the duration of the first cycle, and the first terminal can determine at least one first sub-cycle from the M sub-cycles for sending a reference signal, that is, the first terminal can send a reference signal in the first sub-cycle in the second cycle, but not in other sub-cycles.

[0225] Furthermore, if the first terminal determines to send a reference signal to the second terminal in a first sub-period of each second period, the interval between each reference signal is the duration of the second period; if the first terminal determines to send a reference signal to the second terminal in multiple first sub-periods of each second period, the interval between two adjacent reference signals is an integer multiple of the duration of the first period. Accordingly, the second terminal can receive the reference signal sent by the first terminal using the analog receive beam corresponding to the first terminal at a fixed time domain position in each first period.

[0226] In some embodiments, the first cycle duration corresponds to the number of first terminals sending reference signals to the second terminal.

[0227] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration and unoccupied time domain positions in the first cycle.

[0228] After receiving the first access information, the first terminal can determine the second cycle duration of the second cycle for sending the reference signal by the first terminal based on the received first cycle duration, and based on the unoccupied time domain positions in the first cycle, determine the time domain position for sending the reference signal from the unoccupied time domain positions in the second cycle.

[0229] Furthermore, if the second cycle duration is equal to the duration of M first cycles, then the second cycle can be considered to include M sub-cycles, the cycle duration of each sub-cycle being equal to the duration of the first cycle, and the first terminal can determine at least one first sub-cycle from the M sub-cycles for sending a reference signal, and determine an unoccupied time domain position in the first sub-cycle based on the unoccupied time domain positions in the first cycle, and determine the time domain position for sending the reference signal from the unoccupied time domain positions in the first sub-cycle. The first terminal can send a reference signal to the second terminal using an analog transmit beam corresponding to the second terminal at the time domain position determined in the first sub-cycle of each second cycle.

[0230] Furthermore, the first terminal can send the adjusted configuration of the reference signal to the second terminal, so that the second terminal determines the time domain position allocated to the reference signal corresponding to the first terminal in the first period based on the adjusted configuration, and uses the analog receiving beam corresponding to the first terminal to periodically receive the reference signal sent by the first terminal at this time domain position in each first period.

[0231] In some embodiments, the first information sent by the second terminal to at least one first terminal may include a resource indication for indicating adjustment of the configuration of the reference signal, which may be referred to as an adjustment indication or an adjustment codebook, and may be represented by a bitmap, for example; wherein the length of the resource indication may be used to indicate that the first cycle corresponds to the first cycle duration, for example, if the length of the resource indication is N bits, it indicates that the first cycle duration is N time slots, and each bit corresponds to one time slot in the N time slots; the indication content of the resource indication may be used to indicate an unoccupied time domain in the first cycle.

[0232] In some embodiments, the second terminal may send first information to at least one first terminal, where the first information may be used to indicate a first cycle duration corresponding to a first cycle and a time domain position allocated to the reference signal in the first cycle.

[0233] After receiving the first information, the first terminal can determine the second cycle duration of the second cycle for sending the reference signal by the first terminal based on the received first cycle duration, and determine the time domain position for sending the reference signal in the second cycle based on the time domain position allocated to the reference signal in the first cycle.

[0234] Further, if the duration of the second cycle is the duration of M first cycles, it can be considered that the second cycle includes M sub-cycles, and the cycle length of each sub-cycle is the duration of the first cycle. The first terminal can determine at least one first sub-cycle from the M sub-cycles for sending a reference signal, and based on the time domain position allocated to the reference signal in the first cycle, determine the time domain position for sending the reference signal in the first sub-cycle as the time domain position for sending the reference signal in the second cycle; wherein, the time domain position for sending the reference signal in the first sub-cycle corresponds to the time domain position allocated to the reference signal in the first cycle.

[0235] Furthermore, if the second terminal establishes connections with multiple first terminals, the second terminal allocates different time domain positions to reference signals corresponding to different first terminals in the first period.

[0236] In some embodiments, the first information sent by the second terminal to at least one first terminal may include a resource indication for indicating adjustment of the configuration of the reference signal, which may be referred to as an adjustment indication or an adjustment codebook; wherein the length of the resource indication may be used to indicate that the first cycle corresponds to the first cycle duration, for example, if the length of the resource indication is N bits, it indicates that the first cycle duration is N time slots, and each bit corresponds to one time slot in the N time slots; the indication content of the resource indication may be used to indicate the time domain position allocated to the reference signal in the first cycle.

[0237] In some embodiments, to ensure that the boundaries of the second periods of different first terminals are aligned, the first information sent by the second terminal to at least one first terminal may further be used to indicate the starting position of the time period during which the first terminal periodically transmits the reference signal in the system frame. The first terminal may determine the starting position of the time period during which the first terminal periodically transmits the reference signal in the system frame based on the first information, that is, determine the boundary of the second period corresponding to the first terminal in the system frame.

[0238] Furthermore, the starting position may be represented by a time slot offset.

[0239] Furthermore, the time periods in which different first terminals periodically send reference signals have the same starting position in the system frame.

[0240] It should be noted that the embodiment shown in FIG. 4 can be implemented independently or in combination with at least one other embodiment in the present disclosure. The specific selection can be made as needed and the present disclosure does not limit it.

[0241] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0242] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0243] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0244] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0245] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0246] Corresponding to the aforementioned embodiment of the method for sending a sidelink periodic reference signal, the present disclosure also provides embodiments of a terminal and a network device.

[0247] An embodiment of the present disclosure also proposes a terminal, comprising: one or more processors; a memory coupled to the processor, the memory storing executable instructions, wherein when the executable instructions are executed by the processor, the terminal executes the sidelink periodic reference signal sending method described in the above embodiment.

[0248] FIG5 is a schematic block diagram of a first terminal according to an embodiment of the present disclosure. As shown in FIG5 , the first terminal 500 may be a sidelink periodic reference signal transmitting device, and the device includes a processing module 501 and a transceiver module 502 .

[0249] In some embodiments, the transceiver module 502 is configured to receive first information from a second terminal, where the first information is used to indicate periodic transmission of a reference signal; and the processing module 501 is configured to determine a configuration of the reference signal based on the first information.

[0250] Furthermore, the first information is used to indicate at least one of the following: whether the reference signal overlaps or conflicts with reference signals sent by other terminals; the length of the first cycle; the length of the first cycle is the length of the first cycle for the second terminal to receive the reference signal; the time domain position allocated to the reference signal in the first cycle; the time domain position that is not occupied in the first cycle; the starting position of the time period for the first terminal to send the reference signal in the system frame.

[0251] Furthermore, the first cycle duration corresponds to the number of first terminals that send reference signals to the second terminal.

[0252] Furthermore, the processing module 501 is also used to determine at least one of the following configurations of the reference signal based on the first information: determining the second cycle length corresponding to the second cycle for sending the reference signal by the first terminal; wherein the second cycle length is M times the first cycle length, and M is a positive integer greater than 1; determining the time domain position for sending the reference signal in the second cycle; and determining the starting position of the time period in the system frame.

[0253] Furthermore, the time period includes at least one of the second cycles.

[0254] Further, the processing module 501 is used to determine a first sub-cycle among the M sub-cycles included in the second cycle, and the period length of the sub-cycle is the first period length; determine the time domain position for sending the reference signal in the first sub-cycle as the time domain position for sending the reference signal in the second cycle; wherein, the time domain position for sending the reference signal in the first sub-cycle corresponds to the time domain position allocated to the reference signal in the first cycle.

[0255] Furthermore, the reference signal is a reference signal used for beam failure detection.

[0256] Furthermore, the reference signal is a channel state information reference signal CSI-RS.

[0257] It should be noted that the modules included in the terminal are not limited to the modules described in the above embodiments, and may also include other modules, such as a storage module, a display module, etc.

[0258] FIG6 is a schematic block diagram of a second terminal according to an embodiment of the present disclosure. As shown in FIG6 , the second terminal 600 may be a sidelink periodic reference signal transmitting device, and the device includes a processing module 601 and a transceiver module 602 .

[0259] In some embodiments, the processing module 601 is used to determine first information corresponding to at least one first terminal, where the first information is used to instruct the first terminal to periodically send a reference signal; the transceiver module 602 is used to send the first information to the at least one first terminal.

[0260] Furthermore, the first information is used to indicate at least one of the following: whether the reference signal overlaps or conflicts with reference signals sent by other terminals; the length of the first cycle; the length of the first cycle is the length of the first cycle for the second terminal to receive the reference signal; the time domain position allocated to the reference signal in the first cycle; the time domain position that is not occupied in the first cycle; the starting position of the time period for the first terminal to send the reference signal in the system frame.

[0261] Furthermore, the first cycle duration corresponds to the number of first terminals that send reference signals to the second terminal.

[0262] It should be noted that the modules included in the network device are not limited to the modules described in the above embodiments, and may also include other modules, such as a storage module, a display module, etc.

[0263] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can be referred to the partial description of the method embodiment. The device embodiment described above is merely illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art can understand and implement it without paying any creative work.

[0264] An embodiment of the present disclosure also proposes a communication device, comprising: one or more processors; a memory coupled to the processor, the memory storing executable instructions, wherein when the executable instructions are executed by the processor, the processor calls the executable instructions so that the communication device executes the sidelink periodic reference signal sending method described in the above optional embodiment.

[0265] An embodiment of the present disclosure also proposes a communication system, including a second terminal and at least one first terminal, wherein the first terminal is configured to implement the sidelink periodic reference signal sending method described in the above optional embodiment, and the second terminal is configured to implement the sidelink periodic reference signal sending method described in the above optional embodiment.

[0266] An embodiment of the present disclosure further provides a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the sidelink periodic reference signal sending method described in the above optional embodiment.

[0267] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0268] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0269] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0270] Figure 7 is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a terminal (e.g., a first terminal or a second terminal), or a chip, a chip system, or a processor that supports a terminal in implementing any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0271] As shown in Figure 7, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The processor 7101 is used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0272] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0273] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are performed by the transceiver 7103, and the other steps are performed by the processor 7101.

[0274] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0275] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0276] The communication device 7100 described in the above embodiment may be a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0277] FIG8 is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 8200 shown in FIG8 , but the present disclosure is not limited thereto.

[0278] The chip 8200 includes one or more processors 8201, and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above methods.

[0279] In some embodiments, the chip 8200 further includes one or more interface circuits 8202, which are connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and can be used to send signals to the memory.

[0280] 8203 or other devices to send signals. For example, the interface circuit 8202 can read the instructions stored in the memory 8203 and send the instructions to the processor 8201. Optionally, the terms interface circuit, interface, transceiver pin, transceiver, etc. can be used interchangeably.

[0281] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0282] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0283] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0284] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A method for transmitting sidelink periodic reference signals, characterized in that, it is executed by a first terminal, and the method includes: receiving first information from a second terminal, where the first information is used to indicate that the first terminal periodically transmits reference signals.

2. The method according to claim 1, characterized in that, the first information is used to indicate at least one of the following: there is overlap or conflict between the reference signal and reference signals transmitted by other terminals; a first period duration; the first period duration is the duration of the first period during which the second terminal receives the reference signal; the time domain position allocated for the reference signal in the first period; the unoccupied time domain positions in the first period; the starting position of the time period during which the first terminal transmits the reference signal in the system frame.

3. The method according to claim 2, characterized in that, the first period duration corresponds to the number of first terminals that transmit reference signals to the second terminal.

4. The method according to claim 2 or 3, characterized in that, the method further includes: determining at least one of the following in the configuration of the reference signal according to the first information: determining a second period duration corresponding to a second period during which the first terminal transmits the reference signal; where the second period duration is M times the first period duration, and M is a positive integer greater than 1; determining the time domain position for transmitting the reference signal in the second period; determining the starting position of the time period in the system frame.

5. The method according to claim 4, characterized in that, the time period includes at least one of the second periods.

6. The method according to claim 5, characterized in that, the determining of the time domain position for transmitting the reference signal in the second period includes: determining a first sub-period in M sub-periods included in the second period, where the period duration of the sub-period is the first period duration; determining the time domain position for transmitting the reference signal in the first sub-period as the time domain position for transmitting the reference signal in the second period; where the time domain position for transmitting the reference signal in the first sub-period corresponds to the time domain position allocated for the reference signal in the first period.

7. The method according to any one of claims 1-6, characterized in that, the reference signal is a reference signal for beam failure detection.

8. The method according to any one of claims 1-7, characterized in that, the reference signal is a channel state information reference signal CSI-RS.

9. A method for transmitting sidelink periodic reference signals, characterized in that, it is executed by a second terminal, and the method includes: sending first information to a first terminal, where the first information is used to indicate that the first terminal periodically transmits reference signals.

10. The method according to claim 9, characterized in that, the first information is used to indicate at least one of the following: there is overlap or conflict between the reference signal and reference signals transmitted by other terminals; a first period duration; the first period duration is the duration of the first period during which the second terminal receives the reference signal; ​ The time domain position allocated to the reference signal in the first period The unoccupied time domain position in the first period The starting position in the system frame of the time period when the first terminal transmits the reference signal 11. The method according to claim 10, wherein, the duration of the first period corresponds to the number of first terminals that transmit reference signals to the second terminal 12. A sidelink periodic reference signal transmission method, wherein, comprising: a second terminal transmits first information to a first terminal, the first information being used to instruct the first terminal to periodically transmit a reference signal; the first terminal determines the configuration of the reference signal based on the first information 13. A sidelink periodic reference signal transmission apparatus, wherein, comprising: a transceiver module, configured to receive first information from a second terminal, the first information being used to instruct periodic transmission of a reference signal; a processing module, configured to determine the configuration of the reference signal based on the first information 14. A sidelink periodic reference signal transmission apparatus, wherein, comprising: a processing module, configured to determine first information corresponding to at least one first terminal, the first information being used to instruct the first terminal to periodically transmit a reference signal; a transceiver module, configured to transmit the first information to the at least one first terminal 15. A terminal, wherein, comprising: one or more processors; a memory coupled to the processor, and executable instructions are stored on the memory, wherein when the executable instructions are executed by the processor, the terminal executes the sidelink periodic reference signal transmission method according to any one of claims 1-8, or the sidelink periodic reference signal transmission method according to any one of claims 9-11 16. A communication device, wherein, comprising: one or more processors; a memory coupled to the processor, and executable instructions are stored on the memory, wherein when the executable instructions are executed by the processor, the processor is configured to call instructions to cause the communication device to execute the sidelink periodic reference signal transmission method according to any one of claims 1-8, or the sidelink periodic reference signal transmission method according to any one of claims 9-11 17. A communication system, wherein, comprising a second terminal and at least one first terminal, wherein the first terminal is configured to implement the sidelink periodic reference signal transmission method according to any one of claims 1-8, and the second terminal is configured to implement the sidelink periodic reference signal transmission method according to any one of claims 9-11 18. A storage medium storing instructions, wherein, when the instructions run on a communication device, the communication device is caused to execute the sidelink periodic reference signal transmission method according to any one of claims 1-8, or the sidelink periodic reference signal transmission method according to any one of claims 9-11

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