Signal sending method, signal receiving method, terminal, communication system and storage medium

Abstract

The present application relates to the technical field of communications, and in particular to a signal sending method, a signal receiving method, a terminal, a communication system and a storage medium. The signal sending method comprises: determining, within an unlicensed frequency band resource pool, sub-channels corresponding to resources for transmitting a physical sidelink channel; on the basis of an association relationship between the sub-channels and sidelink positioning reference signal resources, determining a sidelink positioning reference signal resource associated with at least one sub-channel from the sub-channels corresponding to the resources for transmitting the physical sidelink channel; and sending a sidelink positioning reference signal in the sidelink positioning reference signal resource. The present application facilitates the expansion of more optional resources for a sidelink positioning reference signal, and helps to avoid resource conflicts, which are caused by the need to fulfill a specific relationship, between sidelink positioning reference signals sent by different terminals.

Description

Signal sending and receiving method, terminal, communication system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a signal sending method, a signal receiving method, a terminal, a network device, a communication device, and a storage medium. Background Art

[0002] With the development of communication technology, terminals are no longer limited to communicating with network devices in mobile networks. They can also communicate with other terminals via direct links (SL). In scenarios based on direct link communication, direct link positioning can be performed, for example, by the terminal sending and / or receiving a direct link positioning reference signal (SL PRS). However, in direct link positioning scenarios, there are still some technical issues that need to be resolved.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide signal transmission and reception methods, terminals, communication systems, and storage media to solve technical problems in related technologies.

[0005] According to a first aspect of an embodiment of the present disclosure, a signal transmission method is proposed, which is executed by a first terminal. The method includes: determining, within an unlicensed frequency band resource pool, a subchannel corresponding to a resource used to transmit a physical direct link channel; based on an association relationship between the subchannel and a direct link positioning reference signal resource, determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with at least one subchannel; and transmitting a direct link positioning reference signal on the direct link positioning reference signal resource.

[0006] According to a second aspect of an embodiment of the present disclosure, a signal receiving method is proposed, which is performed by a second terminal. The method includes: receiving a direct link positioning reference signal sent by the first terminal in the first aspect.

[0007] According to a third aspect of an embodiment of the present disclosure, a signal sending method is proposed, including: a first terminal determines, in an unlicensed frequency band resource pool, a sub-channel corresponding to a resource used to transmit a physical direct link channel; the first terminal determines, based on an association relationship between the sub-channel and the direct link positioning reference signal resource, a direct link positioning reference signal resource associated with at least one sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel; the first terminal sends a direct link positioning reference signal in the direct link positioning reference signal resource; and a second terminal receives the direct link positioning reference signal.

[0008] According to a fourth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a processing module configured to determine, within an unlicensed frequency band resource pool, a sub-channel corresponding to a resource used to transmit a physical direct link channel; determining, based on an association relationship between the sub-channel and the direct link positioning reference signal resource, a direct link positioning reference signal resource associated with at least one sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel; and a sending module configured to send a direct link positioning reference signal on the direct link positioning reference signal resource.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a terminal is proposed, including: a receiving module configured to receive a direct link positioning reference signal sent by the first terminal in the first aspect.

[0010] According to a sixth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the terminal is used to execute the signal sending method described in the first aspect.

[0011] According to a seventh aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the network device is used to execute the signal receiving method described in the second aspect.

[0012] According to the eighth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a first terminal and a second terminal, wherein the first terminal is configured to implement the signal sending method described in the first aspect, and the second terminal is configured to implement the signal receiving method described in the second aspect.

[0013] According to the ninth 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 signal sending method described in the first aspect and / or the signal receiving method described in the second aspect.

[0014] According to an embodiment of the present disclosure, a direct link positioning reference signal resource may be associated with a subchannel corresponding to a resource used to transmit a physical direct link channel. When a first terminal transmits a physical direct link channel in a subchannel, the direct link positioning reference signal resource may be determined based on the association, thereby enabling the physical direct link channel to be transmitted in the subchannel and sending a direct link positioning reference signal.

[0015] Since the embodiments of the present disclosure do not restrict the direct link positioning reference signal and the physical direct link channel to satisfy a specific relationship, it is convenient to expand the direct link positioning reference signal to have more optional resources, and it is also beneficial to avoid resource conflicts between the direct link positioning reference signals sent by different terminals in order to satisfy the specific relationship. 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 a schematic diagram showing grid multiplexing according to an embodiment of the present disclosure.

[0019] FIG3 is a schematic diagram showing resources in a shared resource pool according to an embodiment of the present disclosure.

[0020] FIG4 is a schematic diagram showing an interleaved transmission according to an embodiment of the present disclosure.

[0021] FIG5 is an interactive schematic diagram showing a signal sending method according to an embodiment of the present disclosure.

[0022] FIG6 is a schematic diagram showing a resource according to an embodiment of the present disclosure.

[0023] FIG7 is a schematic diagram showing an automatic gain control according to an embodiment of the present disclosure.

[0024] FIG8 is a schematic flowchart showing a signal sending method according to an embodiment of the present disclosure.

[0025] FIG9 is a schematic flowchart of a signal receiving method according to an embodiment of the present disclosure.

[0026] FIG10 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.

[0027] FIG11 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.

[0028] FIG12A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0029] FIG12B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The embodiments of the present disclosure provide signal sending and receiving methods, a terminal, a communication system, and a storage medium.

[0031] In a first aspect, an embodiment of the present disclosure proposes a signal sending method, which is executed by a first terminal, and the method includes: determining a sub-channel corresponding to a resource used to transmit a physical direct link channel in an unlicensed frequency band resource pool; determining a direct link positioning reference signal resource associated with at least one sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel based on an association relationship between the sub-channel and the direct link positioning reference signal resource; and sending a direct link positioning reference signal in the direct link positioning reference signal resource.

[0032] In the above embodiment, the direct link positioning reference signal resource may be associated with the sub-channel corresponding to the resource used to transmit the physical direct link channel. When the first terminal transmits the physical direct link channel in the sub-channel, the direct link positioning reference signal resource may be determined based on the association, thereby transmitting the physical direct link channel in the sub-channel and sending the direct link positioning reference signal.

[0033] Since the embodiments of the present disclosure do not restrict the direct link positioning reference signal and the physical direct link channel to satisfy a specific relationship, it is convenient to expand the direct link positioning reference signal to have more optional resources, and it is also beneficial to avoid resource conflicts between the direct link positioning reference signals sent by different terminals in order to satisfy the specific relationship.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the physical direct link channel includes at least one of the following: a physical direct link control channel; and a physical direct link shared channel.

[0035] In combination with some embodiments of the first aspect, in some embodiments, a bandwidth corresponding to the direct link positioning reference signal resource associated with the sub-channel is continuous in the unlicensed frequency band.

[0036] In combination with some embodiments of the first aspect, in some embodiments, the direct link positioning reference signal resources associated with the sub-channels include direct link positioning reference signal resources based on grid multiplexing.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the first terminal does not transmit a physical direct link channel on the direct link positioning reference signal resource.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the direct link positioning reference signal resource occupies multiple sub-channels, and a guard band exists between the multiple sub-channels, and determining that the direct link positioning reference signal resource includes resources corresponding to physical resource blocks in the guard band.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the resource pool includes: sub-channels associated with direct link positioning reference signal resources, and sub-channels not associated with direct link positioning reference signal resources.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the first terminal does not select a sub-channel in the resource pool that is not associated with a direct link positioning reference signal resource.

[0041] In combination with some embodiments of the first aspect, in some embodiments, determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, at least one subchannel-associated direct link positioning reference signal resource includes: determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with a subchannel corresponding to a first index.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the first index includes at least one of the following: the lowest index; the highest index.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the starting time domain unit of the at least one subchannel is used for automatic gain control, and the starting time domain unit of the direct link positioning reference signal resource is used for automatic gain control.

[0044] In combination with some embodiments of the first aspect. In some embodiments, the direct link positioning reference signal sequence corresponding to the starting time domain unit of the direct link positioning reference signal resource and the resources used are the same as the direct link positioning reference signal sequence corresponding to the last time domain unit occupied by the direct link positioning reference signal resource and the frequency domain resources used.

[0045] In combination with some embodiments of the first aspect, in some embodiments, the transmit power of the physical direct link channel in the at least one subchannel is equal to the transmit power of the direct link positioning reference signal in the direct link positioning reference signal resource associated with the at least one subchannel.

[0046] In combination with some embodiments of the first aspect. In some embodiments, the method further includes: performing power boosting on the transmit power of a physical direct link channel transmitted by the at least one subchannel based on the number of physical resource blocks occupied by the information in the at least one subchannel and the number of physical resource blocks occupied by the direct link positioning reference signal in the direct link positioning reference signal resources associated with the at least one subchannel.

[0047] In combination with some embodiments of the first aspect, in some embodiments, each sub-channel in the resource pool is associated with a direct link positioning reference signal resource.

[0048] In combination with some embodiments of the first aspect, in some embodiments, determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, at least one subchannel-associated direct link positioning reference signal resource includes: determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with each subchannel.

[0049] In combination with some embodiments of the first aspect. In some embodiments, each subchannel in the resource pool is configured with the same direct link positioning reference signal resource

[0050] In a second aspect, an embodiment of the present disclosure proposes a signal receiving method, which is performed by a second terminal. The method includes: receiving a direct link positioning reference signal sent by the first terminal in any one of the first aspect and the optional embodiments of the first aspect.

[0051] In a third aspect, an embodiment of the present disclosure proposes a signal sending method, including: a first terminal determines a sub-channel corresponding to a resource for transmitting a physical direct link channel in an unlicensed frequency band resource pool; the first terminal determines at least one sub-channel-associated direct link positioning reference signal resource in the sub-channel corresponding to the resource for transmitting the physical direct link channel based on an association relationship between the sub-channel and the direct link positioning reference signal resource; the first terminal sends a direct link positioning reference signal in the direct link positioning reference signal resource; and a second terminal receives the direct link positioning reference signal.

[0052] In a fourth aspect, an embodiment of the present disclosure proposes a terminal, comprising: a processing module, configured to determine a sub-channel corresponding to resources for transmitting a physical direct link channel in an unlicensed frequency band resource pool; based on an association relationship between the sub-channel and the direct link positioning reference signal resource, determining at least one sub-channel-associated direct link positioning reference signal resource in the sub-channel corresponding to the resources for transmitting the physical direct link channel; and a sending module, configured to send a direct link positioning reference signal in the direct link positioning reference signal resource.

[0053] In a fifth aspect, an embodiment of the present disclosure proposes a terminal, comprising: a receiving module configured to receive a direct link positioning reference signal sent by the first terminal in the first aspect.

[0054] In a sixth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the signal sending method described in any one of the first aspect and the optional embodiments of the first aspect.

[0055] In a seventh aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the network device is used to execute the signal receiving method described in the second aspect.

[0056] In the eighth aspect, an embodiment of the present disclosure proposes a communication system, including a first terminal and a second terminal, wherein the first terminal is configured to implement the signal sending method described in the first aspect, and the second terminal is configured to implement the signal receiving method described in the second aspect.

[0057] In the ninth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the signal sending method described in the first aspect and / or the signal receiving method described in the second aspect.

[0058] 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 any one of the methods in the first and second aspects and the optional implementation embodiments of the first and second aspects.

[0059] 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 any one of the methods of the first and second aspects, and the optional implementation embodiments of the first and second aspects.

[0060] It is understandable that the above-mentioned terminal, communication system, storage medium, program product, and computer program are all used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method and will not be repeated here.

[0061] The present disclosure provides signal transmission and reception methods, terminals, communication systems, and storage media. In some embodiments, the terms signal transmission and reception methods, information processing methods, and communication methods are interchangeable; the terms terminal, information processing device, and communication device are interchangeable; and the terms information processing system and communication system are interchangeable.

[0062] 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 implementation methods 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 implementation methods of other embodiments.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0068] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0069] 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 above is also applicable when there are more branches such as A, B, and C.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0077] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0083] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0084] 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.

[0085] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0086] As shown in Figure 1, the communication system 100 includes a first terminal 101 and a second terminal 102, wherein the first terminal and the second terminal can communicate through a direct link (sidelink), and the first terminal and the second terminal can also communicate with network devices respectively, and the network devices include at least one of the following: access network devices, core network devices.

[0087] In some embodiments, the terminal 101 includes, 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 is not limited thereto.

[0088] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (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 base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0089] 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).

[0090] 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 Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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).

[0095] In some embodiments, in a scenario where a terminal communicates based on a sidelink (SL), the terminal may implement sidelink positioning based on a sidelink positioning reference signal (SL PRS), for example, by transmitting a SL PRS, or by receiving a SL PRS. The following embodiments mainly use the example of a terminal transmitting a SL PRS to exemplify the technical solution of the present disclosure.

[0096] In some embodiments, in a direct link positioning scenario, the resource for the terminal to send the SL PRS includes but is not limited to one of the following:

[0097] Send SL PRS via dedicated resources;

[0098] The SL PRS is sent through resources in a shared resource pool.

[0099] In some embodiments, sending the SL PRS through dedicated resources means that the terminal is configured with resources dedicated to sending the SL PRS. In this case, the SL PRSs of different terminals can be sent through comb multiplexing.

[0100] FIG2 is a schematic diagram showing grid multiplexing according to an embodiment of the present disclosure.

[0101] Taking two terminals sending SL PRS separately as an example, as shown in Figure 2, for example, a grid can be called an information unit, and the information unit corresponds to a symbol in the time domain and a physical resource block (PRB) in the subchannel in the frequency domain. The SL PRS sent by terminal #1 and the SL PRS sent by terminal #2 multiplex the resources corresponding to two symbols in the time domain and multiple PRBs in the frequency domain as shown in Figure 2.

[0102] Taking the SL PRS sent by terminal #1 as an example, only one information unit among the two adjacent information units in the time domain is used to send the SL PRS, and only one information unit among the two adjacent information units in the frequency domain is used to send the SL PRS. Moreover, the information units used to send the SL PRS on adjacent symbols are adjacent in the frequency domain, and the information units used to send the SL PRS in the frequency domain resources corresponding to adjacent PRBs are adjacent in the time domain. It can be seen that the terminal sends the SL PRS based on the resources shown in Figure 2, which can ensure that the SL PRS is continuous in the frequency domain.

[0103] In some embodiments, sending the SL PRS through resources in a shared resource pool means that the terminal is configured with a shared resource pool. For example, the shared resource pool may be configured by a network device or may be determined based on a protocol agreement.

[0104] The resources in the shared resource pool can be used by the terminal to send SL PRS and transmit physical direct link channels, such as the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH).

[0105] In the case where the terminal sends the SL PRS through resources in the shared resource pool, currently, sending the SL PRS through grid multiplexing is not supported.

[0106] FIG3 is a schematic diagram showing resources in a shared resource pool according to an embodiment of the present disclosure.

[0107] As shown in Figure 3, within the resource bandwidth of the shared resource pool, the terminal can send PSCCH, PSSCH and SL-PRS in one time slot, and the bandwidth occupied by SL-PRS needs to meet a specific relationship with the bandwidth occupied by PSCCH and PSSCH, such as being equal.

[0108] In some embodiments, the terminal can occupy frequency domain resources in an unlicensed frequency band for communication. For example, it can communicate based on a direct link (Sidelink Unlicensed, SL-U) on the frequency domain resources of the unlicensed frequency band. Further, for example, direct link positioning can be performed on the frequency domain resources of the unlicensed frequency band.

[0109] In the SL-U scenario, in order to meet the occupied channel bandwidth (OCB) requirement, the transmission of PSCCH and PSSCH in an interlaced PRB manner is supported.

[0110] FIG4 is a schematic diagram showing an interleaved transmission according to an embodiment of the present disclosure.

[0111] As shown in FIG4 , the bandwidth of the frequency domain resources of the unlicensed frequency band occupied by the terminal may include multiple sub-channels, and one sub-channel may correspond to one resource block set (RB set).

[0112] A subchannel may include multiple PRBs, each subchannel is used for the transmission of a physical direct link channel (PSCCH and / or PSSCH). Among the multiple PRBs corresponding to a subchannel, one PRB out of every 10 PRBs is used for the transmission of the physical direct link channel, which is equivalent to the physical direct link channel occupying the bandwidth occupied by the terminal in the unlicensed frequency band.

[0113] In some embodiments, when the terminal performs direct link positioning on the frequency domain resources of an unlicensed frequency band, if the SL PRS sent through the resources in the shared resource pool still needs to satisfy a specific relationship with physical direct link channels such as PSCCH and PSSCH, and does not support the sending of SL PRS through grid multiplexing, it may cause some technical problems.

[0114] For example, if the bandwidth of the SL PRS is required to be equal to the bandwidth of the physical direct link channel based on the requirement of sending the SL PRS through the resources in the shared resource pool, since the PRBs corresponding to the physical direct link are interleaved, the SL PRS also needs to remain continuous in the frequency domain, which will cause the SL PRS corresponding to the physical direct link channel of the same terminal transmitted by multiple PRBs to remain continuous in the frequency domain, thereby continuously occupying the frequency domain resources between multiple PRBs, severely limiting the optional resources of the SL PRS. Moreover, in this case, even if different terminals select different sub-channels to transmit the physical direct link channel and the SL PRS, since the PRS of one terminal needs to continuously occupy the frequency domain resources between multiple PRBs, there will still be resource conflicts (collisions) among the SL PRSs sent by different terminals.

[0115] FIG5 is an interactive schematic diagram showing a signal sending method according to an embodiment of the present disclosure.

[0116] As shown in FIG5 , the signal sending method may include the following steps:

[0117] In step S501, the first terminal determines a direct link positioning reference signal resource.

[0118] In step S502, the first terminal sends a direct link positioning reference signal to the second terminal using a direct link positioning reference signal resource.

[0119] In some embodiments, the second terminal performs positioning according to the direct link positioning reference signal, for example, determines the position of the first terminal.

[0120] In some embodiments, the first terminal may first determine an unlicensed frequency band resource pool. For example, the first terminal may determine a sub-channel corresponding to a resource for transmitting a physical direct link channel in the unlicensed frequency band resource pool.

[0121] In some embodiments, the physical direct link channel includes at least one of the following:

[0122] Physical direct link control channel (PSCCH);

[0123] Physical direct link shared channel (PSSCH).

[0124] In some embodiments, the unlicensed frequency band resource pool may include at least one sub-channel, and one sub-channel may correspond to one resource block set.

[0125] In some embodiments, an association relationship may exist between a sub-channel and a direct link positioning reference signal resource. The first terminal may first determine the association relationship, and then, based on the association relationship, determine a direct link positioning reference signal resource associated with at least one sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel.

[0126] In a further embodiment, the first terminal may send a direct link positioning reference signal on a direct link positioning reference signal resource associated with a subchannel. For example, the direct link positioning reference signal may be used for direct link positioning.

[0127] According to an embodiment of the present disclosure, a direct link positioning reference signal resource may be associated with a subchannel corresponding to a resource used to transmit a physical direct link channel. When a first terminal transmits a physical direct link channel in a subchannel, the direct link positioning reference signal resource may be determined based on the association, thereby enabling the physical direct link channel to be transmitted in the subchannel and sending a direct link positioning reference signal.

[0128] Since the embodiments of the present disclosure do not restrict the direct link positioning reference signal and the physical direct link channel to satisfy a specific relationship, it is convenient to expand the direct link positioning reference signal to have more optional resources, and it is also beneficial to avoid resource conflicts between the direct link positioning reference signals sent by different terminals in order to satisfy the specific relationship.

[0129] In some embodiments, the first terminal determines at least one direct link positioning reference signal resource associated with a subchannel in a subchannel corresponding to resources used to transmit a physical direct link channel. For example, the first terminal may determine a direct link positioning reference signal resource associated with a subchannel corresponding to a first index in a subchannel corresponding to resources used to transmit a physical direct link channel.

[0130] In some embodiments, the first index comprises at least one of: a lowest index; a highest index.

[0131] In some embodiments, the first terminal may perform the steps described in the embodiments of the present disclosure in an unlicensed band direct link positioning (SL-U) scenario.

[0132] Due to the unlicensed frequency band direct link positioning scenario, in order to meet the occupied channel bandwidth (OCB) requirements, the first terminal needs to transmit the physical direct link channel in an interleaved PRB manner. For example, the bandwidth occupied by the first terminal in the unlicensed frequency band includes a sub-channels, and one sub-channel corresponds to b PRBs. For the physical direct link channel that the first terminal needs to transmit, in the b PRBs corresponding to one sub-channel, one physical direct link channel can be transmitted every c PRBs, where a, b, and c are integers greater than or equal to 1, and c is less than or equal to b.

[0133] That is, in the unlicensed frequency band direct link positioning scenario, the first terminal can occupy n sub-channels, and each sub-channel can be associated with a direct link positioning reference signal resource. Then, when determining the direct link positioning reference signal resource associated with at least one sub-channel, the direct link positioning reference signal resource associated with the sub-channel corresponding to the first index can be determined among the n sub-channels.

[0134] For example, the indexes of the n subchannels are 1 to n, where the lowest index is 1 and the highest index is n. When the first index is the lowest index, the first terminal may determine that the direct link positioning reference signal resource associated with the subchannel corresponding to index 1 is used to send the direct link positioning reference signal. When the first index is the highest index, the first terminal may determine that the direct link positioning reference signal resource associated with the subchannel corresponding to index n is used to send the direct link positioning reference signal.

[0135] In some embodiments, the bandwidth corresponding to the direct link positioning reference signal resource associated with the subchannel is continuous in the unlicensed frequency band. Accordingly, the direct link positioning reference signal can be transmitted on continuous frequency domain resources in the unlicensed frequency band. The corresponding direct link positioning reference signal reception quality is relatively high, facilitating accurate positioning results based on the direct link positioning reference signal in unlicensed frequency band direct link positioning scenarios.

[0136] In some embodiments, the direct link positioning reference signal resources associated with the subchannels include direct link positioning reference signal resources based on comb multiplexing.

[0137] FIG6 is a schematic diagram showing a resource according to an embodiment of the present disclosure.

[0138] The frequency domain resources of the unlicensed frequency band occupied by the first terminal include a subchannels, one subchannel corresponds to b PRBs, and in the b PRBs corresponding to one subchannel, one physical direct link channel can be transmitted every c PRBs.

[0139] For example, where a = 2, b = 20, and c = 10, and the physical direct link channel includes the PSSCH, with the first index being the lowest index, the grid-based multiplexing parameters (M, N) of the direct link positioning reference signal resource associated with the subchannel with index 1 are (2, 2), where M is the number of symbols occupied by the direct link positioning reference signal resource, and N is the size (also understood as the period) of the direct link positioning reference signal resource multiplexing grid.

[0140] As shown in Figure 6, when the first terminal sends PSSCH, it can send PSSCH in 2 sub-channels. For example, in the PRB of subchannel #1, PSSCH is transmitted through one PRB in every 10 PRBs, and in the PRB of subchannel #2, PSSCH is transmitted through one PRB in every 10 PRBs.

[0141] The first terminal can determine the direct link positioning reference signal resource based on the grid multiplexing parameter (2, 2) of the direct link positioning reference signal resource associated with the subchannel with index 1, for example, the resource after the PSSCH, which occupies two symbols in the time domain in a grid multiplexing manner.

[0142] It can be seen that since the direct link positioning reference signal resources are based on grid multiplexing, on the one hand, it can ensure that they are continuous in the frequency domain within a time domain range (for example, within the two symbols shown in Figure 6). On the other hand, some unoccupied grids are retained within the time domain range, which can be used by other terminals to send direct link positioning reference signal resources, which is beneficial to avoid conflicts in direct link positioning reference signal resources sent by different terminals.

[0143] In some embodiments, the first terminal does not transmit a physical direct link channel on the direct link positioning reference signal resource. The direct link positioning reference signal resource is used only by the first terminal to send a direct link positioning reference signal, and is not used by the first terminal to transmit a physical direct link channel, so as to avoid conflict between the physical direct link channel and the direct link positioning reference signal resource.

[0144] It should be noted that since the subchannels in the resource pool can be used to transmit physical direct links and can also be associated with direct link positioning reference signal resources for sending direct link positioning reference signals, this resource pool is not applicable to legacy terminals that only support direct link communications (e.g., physical direct link transmission). Therefore, this resource pool may not be configured for terminals that only support direct link communications.

[0145] In some embodiments, the direct link positioning reference signal resource occupies multiple sub-channels, and a guard band exists between the multiple sub-channels. The direct link positioning reference signal resource is determined to include resources corresponding to physical resource blocks in the guard band.

[0146] In some embodiments, a guard band (GB) may be provided between sub-channels to avoid inter-channel interference.

[0147] In some embodiments, when a direct link positioning reference signal resource occupies multiple subchannels, if a guard band exists between these multiple subchannels, then to ensure the continuity of the direct link positioning reference signal resource in the frequency domain, the direct link positioning reference signal resource may be determined to include resources corresponding to physical resource blocks (PRBs) in the guard band. For example, if the guard band corresponds to at least one PRB, the first terminal may also transmit the direct link positioning reference signal on the resources corresponding to the at least one PRB.

[0148] In some embodiments, the resource pool includes: sub-channels associated with direct link positioning reference signal resources, and sub-channels not associated with direct link positioning reference signal resources.

[0149] In some embodiments, the first terminal does not select a sub-channel in the resource pool that has no association with the direct link positioning reference signal resource.

[0150] In the case where the resource pool includes sub-channels that are associated with direct link positioning reference signal resources and sub-channels that are not associated with direct link positioning reference signal resources, that is, the resource pool includes multiple sub-channels, some of which are associated with direct link positioning reference signal resources, and some of which are not associated with direct link positioning reference signal resources.

[0151] If the first terminal selects a sub-channel that is not associated with a direct link positioning reference signal resource when needing to transmit a physical direct link channel, since the sub-channel is not associated with the direct link positioning reference signal resource, the corresponding direct link positioning reference signal resource cannot be determined based on the transmission of the physical direct link channel on the sub-channel, and the direct link positioning reference signal cannot be sent.

[0152] Therefore, in this embodiment, in order to transmit the physical direct link channel, when the first terminal determines the sub-channel corresponding to the resource used to transmit the physical direct link channel in the unlicensed frequency band resource pool, it can select a sub-channel that is associated with the direct link positioning reference signal resource to transmit the physical direct link channel, rather than selecting a sub-channel that is not associated with the direct link positioning reference signal resource, thereby avoiding the inability to determine the corresponding direct link positioning reference signal resource based on the sub-channel, resulting in the inability to send the direct link positioning reference signal.

[0153] In some embodiments, a starting time domain unit of at least one subchannel is used for automatic gain control (AGC), and a starting time domain unit of a direct link positioning reference signal resource is used for the AGC.

[0154] In an embodiment of the present disclosure, after transmitting a physical direct link channel on a subchannel in an occupied unlicensed frequency band, the first terminal may also transmit a direct link positioning reference signal. For a second terminal communicating with the first terminal, automatic gain control may be performed at the starting position of receiving the physical direct link channel, such as the starting time domain unit of the subchannel, to ensure reception quality of the physical direct link channel. However, since the physical direct link channel and the direct link positioning reference signal are different, their transmit powers may also differ. Therefore, after completing reception of the physical direct link channel, automatic gain control is also required at the starting position of receiving the direct link positioning reference signal, such as the starting time domain unit of the direct link positioning reference signal resource, to ensure reception quality of the direct link positioning reference signal.

[0155] In some embodiments, the direct link positioning reference signal sequence corresponding to the starting time domain unit of the direct link positioning reference signal resource and the frequency domain resources used are the same as the direct link positioning reference signal sequence corresponding to the last time domain unit occupied by the direct link positioning reference signal resource and the frequency domain resources used.

[0156] FIG7 is a schematic diagram showing an automatic gain control according to an embodiment of the present disclosure.

[0157] As shown in FIG7 , taking the direct link positioning reference signal resource as a direct link positioning reference signal resource based on grid multiplexing as an example, (M, N) is (2, 2).

[0158] When the starting time domain unit of the direct link positioning reference signal resource is used for automatic gain control, if (M, N) is (2, 2), that is, the direct link positioning reference signal is sent only on 2 symbols, since the first symbol is used for automatic gain control, the second terminal receiving the direct link positioning reference signal will not be able to receive the direct link positioning reference signal on both symbols.

[0159] Therefore, when the starting time domain unit of the direct link positioning reference signal resource is used for automatic gain control, the direct link positioning reference signal resource includes not only resources for sending the direct link positioning reference signal but also resources for automatic gain control. On the resources used for automatic gain control, for example, the first time domain unit in the direct link positioning reference signal resource shown in FIG7 , the first terminal can send the direct link positioning reference signal. The sequence of the sent direct link positioning reference signal and the frequency domain resources used are the same as the direct link positioning reference signal sequence and the frequency domain resources corresponding to the last time domain unit occupied by the direct link positioning reference signal resource (for example, the third time domain unit in FIG7 ). That is, the frequency domain sequences of the direct link positioning reference signals in the first and last time domain units in the direct link positioning reference signal resource are the same, and the corresponding frequency domain resources are also the same.

[0160] Based on this, it can be ensured that the second terminal can perform automatic gain control according to the signal on the first time domain unit in the direct link positioning reference signal resource, and it can also be ensured that the second terminal can receive the direct link positioning reference signal on the subsequent two symbols, which is conducive to ensuring good reception quality for the direct link positioning reference signal.

[0161] In some embodiments, the transmit power of a physical direct link channel in at least one subchannel is equal to the transmit power of a direct link positioning reference signal in a direct link positioning reference signal resource associated with the at least one subchannel. For example, the transmit power may be equal within a time domain unit, or may be equal within multiple time domain units, or may be equal within the channel occupancy time (COT) of a subchannel in an unlicensed frequency band, where a time domain unit includes at least one of the following: a frame, a subframe, a time slot, or a symbol.

[0162] In an embodiment of the present disclosure, after transmitting a physical direct link channel on a subchannel in an occupied unlicensed frequency band, a first terminal may also transmit a direct link positioning reference signal. Although the physical direct link channel and the direct link positioning reference signal are different, the first terminal can ensure that their transmit powers are the same through power control. Therefore, a second terminal communicating with the first terminal only needs to perform automatic gain control at the starting position of receiving the physical direct link channel, such as the starting time domain unit of the subchannel, without having to perform automatic gain control at the starting position of receiving the direct link positioning reference signal.

[0163] In some embodiments, the signal sending method further includes: power enhancing the transmission power of the physical direct link channel transmitted by at least one subchannel based on the number of physical resource blocks occupied by the information in at least one subchannel and the number of physical resource blocks occupied by the direct link positioning reference signal in the direct link positioning reference signal resources associated with at least one subchannel.

[0164] Because the direct link positioning reference signal resources are continuous in the frequency domain, but the physical direct link channel is transmitted on interleaved PRBs in the frequency domain, the corresponding resources are not continuous. In some embodiments, such as shown in Figure 6, the resources corresponding to the direct link positioning reference signal resources in the frequency domain include the resources corresponding to the physical direct link channel in the frequency domain. Therefore, the transmit power of the physical direct link channel transmitted on at least one subchannel can be power boosted.

[0165] For example, taking the physical direct link channel including PSSCH as an example, the transmit power of PSSCH before power boosting is PSSCH(i), and the transmit power of PSSCH after power boosting is PSSCH(i+1), where:

[0166] RB(i) corresponds to the subchannel with index i, Indicates the number of PRBs corresponding to the direct link positioning reference signal on the subchannel indexed by i. Indicates the number of PRBs corresponding to the PSSCH on the subchannel with index i.

[0167] In some embodiments, each subchannel in the resource pool is configured with the same direct link positioning reference signal resources. For example, when the direct link positioning reference signal resources include grid-multiplexed direct link positioning reference signal resources, each subchannel in the resource pool is configured with the same grid-multiplexed parameters (M, N). In this case, regardless of which subchannel in the resource pool the first terminal determines to transmit the physical direct link channel, the subchannel's associated direct link positioning reference signal resources remain the same, simplifying the configuration of direct link positioning reference signal resources for the first terminal.

[0168] In some embodiments, each sub-channel in the resource pool is associated with a direct link positioning reference signal resource.

[0169] In some embodiments, determining at least one direct link positioning reference signal resource associated with a subchannel in a subchannel corresponding to resources used to transmit a physical direct link channel includes: determining a direct link positioning reference signal resource associated with each subchannel in a subchannel corresponding to resources used to transmit a physical direct link channel.

[0170] In some embodiments, each subchannel in the resource pool is configured with the same direct link positioning reference signal resource, while in other embodiments, each subchannel in the resource pool is associated with a direct link positioning reference signal resource, and each subchannel in the resource pool can be configured with a different direct link positioning reference signal resource. In this case, the grid multiplexing-based parameters configured for each subchannel in the resource pool can also be different.

[0171] In this case, when the first terminal determines the direct link positioning reference signal resource associated with the sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel, it can determine the direct link positioning reference signal resource associated with each sub-channel. For example, multiple direct link positioning reference signal resources can be determined, and the multiple direct link positioning reference signal resources can correspond to multiple grid-based multiplexing parameters. The first terminal can send a direct link positioning reference signal on these multiple direct link positioning reference signal resources.

[0172] In some embodiments, when multiple first terminals select subchannels in a resource pool to transmit a physical direct link channel, each first terminal may respectively send an associated direct link positioning reference signal through a direct link positioning reference signal resource associated with the selected subchannel.

[0173] In some embodiments, when a first terminal selects multiple sub-channels in a resource pool to transmit a physical direct link channel, the first terminal may send associated direct link positioning reference signals through multiple direct link positioning reference signal resources associated with the selected multiple sub-channels, wherein the multiple direct link positioning reference signal resources may correspond to multiple grid-based multiplexing parameters.

[0174] In some embodiments, a direct link positioning reference signal resource corresponding to a parameter based on grid multiplexing may be referred to as a candidate, or a time division multiplexing group (TDM group). Because the time domain resources corresponding to multiple TDM groups corresponding to parameters based on grid multiplexing are different, for example, some TDM groups are relatively early in the time domain, while others are relatively late in the time domain.

[0175] Furthermore, since the sub-channel is in the unlicensed frequency band, the first terminal ensures continuous occupation of the sub-channel in the unlicensed frequency band when occupying the sub-channel for communication.

[0176] For example, consider two adjacent TDM groups, TDM group #1 and TDM group #2. TDM group #1 is located earlier in the time domain, while TDM group #2 is located later. When a first terminal occupies the later TDM group to transmit a direct link positioning reference signal, it also needs to occupy the common sequence in TDM group #1 to ensure continuous occupancy of the subchannel. The common sequence can be configured for a resource pool, and multiple terminals using resources in that resource pool have a consistent understanding of the common sequence.

[0177] The communication method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S210x. For example, step S501 may be implemented as an independent embodiment, step S502 may be implemented as an independent embodiment, and steps S501+S502 may be implemented as independent embodiments, but are not limited thereto.

[0178] In some embodiments, steps S501 and S502 may be executed in an interchangeable order or simultaneously.

[0179] In some embodiments, step S501 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0180] In some embodiments, step S502 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0181] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0182] In a first aspect, embodiments of the present disclosure provide a signal transmission method. FIG8 is a schematic flow chart illustrating a signal transmission method according to an embodiment of the present disclosure. The signal transmission method illustrated in this embodiment may be executed by a first terminal.

[0183] As shown in FIG8 , the signal sending method may include the following steps:

[0184] In step S801, a sub-channel corresponding to a resource for transmitting a physical direct link channel is determined in an unlicensed frequency band resource pool;

[0185] In step S802, based on the association relationship between the subchannel and the direct link positioning reference signal resource, determining a direct link positioning reference signal resource associated with at least one subchannel in a subchannel corresponding to a resource used to transmit a physical direct link channel;

[0186] In step S803, a direct link positioning reference signal is sent in a direct link positioning reference signal resource.

[0187] It should be noted that the embodiment shown in FIG8 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.

[0188] The optional implementation of steps S801 to S803 can be found in the optional implementation of the steps in FIG5 and other related parts in the embodiment involved in FIG5 , and will not be described in detail here.

[0189] In some embodiments, the physical direct link channel includes at least one of the following:

[0190] Physical direct link control channel;

[0191] Physical direct links share the channel.

[0192] In some embodiments, the bandwidth corresponding to the direct link positioning reference signal resource associated with the sub-channel is continuous in the unlicensed frequency band.

[0193] In some embodiments, the direct link positioning reference signal resources associated with the subchannels include direct link positioning reference signal resources based on grid multiplexing.

[0194] In some embodiments, the first terminal does not transmit a physical direct link channel on a direct link positioning reference signal resource.

[0195] In some embodiments, the direct link positioning reference signal resource occupies multiple sub-channels, and a guard band exists between the multiple sub-channels. The direct link positioning reference signal resource is determined to include resources corresponding to physical resource blocks in the guard band.

[0196] In some embodiments, the resource pool includes: sub-channels associated with direct link positioning reference signal resources, and sub-channels not associated with direct link positioning reference signal resources.

[0197] In some embodiments, the first terminal does not select a sub-channel in the resource pool that has no association with the direct link positioning reference signal resource.

[0198] In some embodiments, determining, in a subchannel corresponding to a resource used to transmit a physical direct link channel, a direct link positioning reference signal resource associated with at least one subchannel includes:

[0199] A direct link positioning reference signal resource associated with a subchannel corresponding to a first index is determined in a subchannel corresponding to a resource used to transmit a physical direct link channel.

[0200] In some embodiments, the first index comprises at least one of: a lowest index; a highest index.

[0201] In some embodiments, a starting time domain unit of at least one subchannel is used for automatic gain control, and a starting time domain unit of a direct link positioning reference signal resource is used for automatic gain control.

[0202] In some embodiments, the direct link positioning reference signal sequence corresponding to the starting time domain unit of the direct link positioning reference signal resource and the resources used are the same as the direct link positioning reference signal sequence corresponding to the last time domain unit occupied by the direct link positioning reference signal resource and the frequency domain resources used.

[0203] In some embodiments, the transmit power of the physical direct link channel in at least one subchannel is equal to the transmit power of the direct link positioning reference signal in the direct link positioning reference signal resource associated with the at least one subchannel.

[0204] In some embodiments, the signal sending method further includes: power enhancing the transmission power of the physical direct link channel transmitted by at least one subchannel based on the number of physical resource blocks occupied by the information in at least one subchannel and the number of physical resource blocks occupied by the direct link positioning reference signal in the direct link positioning reference signal resources associated with at least one subchannel.

[0205] In some embodiments, each sub-channel in the resource pool is associated with a direct link positioning reference signal resource.

[0206] In some embodiments, determining, in a subchannel corresponding to a resource used to transmit a physical direct link channel, a direct link positioning reference signal resource associated with at least one subchannel includes:

[0207] In a sub-channel corresponding to a resource used to transmit a physical direct link channel, a direct link positioning reference signal resource associated with each sub-channel is determined.

[0208] In some embodiments, each subchannel in the resource pool is configured with the same direct link positioning reference signal resource.

[0209] In a second aspect, embodiments of the present disclosure provide a signal receiving method. Figure 9 is a schematic flow chart illustrating a signal receiving method according to an embodiment of the present disclosure. The signal sending method illustrated in this embodiment may be executed by a second terminal.

[0210] As shown in FIG9 , the signal receiving method may include the following steps:

[0211] In step S901, a direct link positioning reference signal sent by a first terminal according to any one of the first aspect and the optional embodiments of the first aspect is received.

[0212] 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.

[0213] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0214] 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.

[0215] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0216] Corresponding to the aforementioned embodiments of the signal sending method and the signal receiving method, the present disclosure also provides an embodiment of a terminal.

[0217] FIG10 is a schematic block diagram of a terminal (eg, a first terminal) according to an embodiment of the present disclosure. As shown in FIG10 , the terminal includes a processing module 1001 and a sending module 1002 .

[0218] In some embodiments, the processing module 1001 is configured to determine, in an unlicensed frequency band resource pool, a subchannel corresponding to a resource used to transmit a physical direct link channel; and determine, based on an association relationship between the subchannel and the direct link positioning reference signal resource, a direct link positioning reference signal resource associated with at least one subchannel in the subchannel corresponding to the resource used to transmit the physical direct link channel;

[0219] The sending module 1002 is configured to send a direct link positioning reference signal in the direct link positioning reference signal resource.

[0220] In some embodiments, the physical direct link channel includes at least one of the following: a physical direct link control channel; and a physical direct link shared channel.

[0221] In some embodiments, the bandwidth corresponding to the direct link positioning reference signal resource associated with the sub-channel is continuous in the unlicensed frequency band.

[0222] In some embodiments, the direct link positioning reference signal resources associated with the sub-channels include direct link positioning reference signal resources based on grid multiplexing.

[0223] In some embodiments, the first terminal does not transmit a physical direct link channel on the direct link positioning reference signal resource.

[0224] In some embodiments, the direct link positioning reference signal resource occupies multiple sub-channels, and a guard band exists between the multiple sub-channels, and determining the direct link positioning reference signal resource includes resources corresponding to physical resource blocks in the guard band.

[0225] In some embodiments, the resource pool includes: sub-channels associated with direct link positioning reference signal resources, and sub-channels not associated with direct link positioning reference signal resources.

[0226] In some embodiments, the first terminal does not select a sub-channel in the resource pool that has no association with a direct link positioning reference signal resource.

[0227] In some embodiments, the processing module is configured to determine, in the sub-channel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with the sub-channel corresponding to the first index.

[0228] In some embodiments, the first index comprises at least one of: a lowest index; a highest index.

[0229] In some embodiments, the starting time domain unit of the at least one subchannel is used for automatic gain control, and the starting time domain unit of the direct link positioning reference signal resource is used for automatic gain control.

[0230] In some embodiments, the direct link positioning reference signal sequence corresponding to the starting time domain unit of the direct link positioning reference signal resource and the resources used are the same as the direct link positioning reference signal sequence corresponding to the last time domain unit occupied by the direct link positioning reference signal resource and the frequency domain resources used.

[0231] In some embodiments, the transmit power of the physical direct link channel in the at least one subchannel is equal to the transmit power of the direct link positioning reference signal in the direct link positioning reference signal resource associated with the at least one subchannel.

[0232] In some embodiments, the processing module is further configured to power enhance the transmission power of the physical direct link channel transmitted by the at least one subchannel based on the number of physical resource blocks occupied by the information in the at least one subchannel and the number of physical resource blocks occupied by the direct link positioning reference signal in the direct link positioning reference signal resources associated with the at least one subchannel.

[0233] In some embodiments, each sub-channel in the resource pool is associated with a direct link positioning reference signal resource.

[0234] In some embodiments, the processing module is configured to determine, in the sub-channel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with each sub-channel.

[0235] In some embodiments, each subchannel in the resource pool is configured with the same direct link positioning reference signal resource.

[0236] FIG11 is a schematic block diagram of a terminal (eg, a second terminal) according to an embodiment of the present disclosure. As shown in FIG11 , the terminal includes a receiving module 1101 .

[0237] In some embodiments, the receiving module is configured to receive a direct link positioning reference signal sent by the first terminal in any one of the first aspect and the optional embodiments of the first aspect.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] Figure 12A is a schematic diagram of the structure of a communication device 12100 proposed in an embodiment of the present disclosure. Communication device 12100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 12100 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.

[0243] As shown in Figure 12A, the communication device 12100 includes one or more processors 12101. The processor 12101 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 the communication protocol 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. Optionally, the communication device 12100 is used to perform any of the above methods. Optionally, one or more processors 12101 are used to call instructions to enable the communication device 12100 to perform any of the above methods.

[0244] In some embodiments, the communication device 12100 further includes one or more transceivers 12102. When the communication device 12100 includes one or more transceivers 12102, the transceiver 12102 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, steps S501 and S502, but not limited thereto), and the processor 12101 performs at least one of the other steps (for example, steps S501 and S502, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0245] In some embodiments, the communication device 12100 further includes one or more memories 12103 for storing data. Alternatively, all or part of the memories 12103 may be located outside the communication device 12100. In alternative embodiments, the communication device 12100 may include one or more interface circuits 12104. Optionally, the interface circuits 12104 are connected to the memory 12102 and may be configured to receive data from the memory 12102 or other devices, or to send data to the memory 12102 or other devices. For example, the interface circuits 12104 may read data stored in the memory 12102 and send the data to the processor 12101.

[0246] The communication device 12100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 12100 described in the present disclosure is not limited thereto, and the structure of the communication device 12100 may not be limited by FIG. 12A. 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.

[0247] 12B is a schematic diagram of the structure of a chip 12200 according to an embodiment of the present disclosure. If the communication device 12100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 12200 shown in FIG12B , but the present disclosure is not limited thereto.

[0248] The chip 12200 includes one or more processors 12501. The chip 12200 is configured to execute any of the above methods.

[0249] In some embodiments, chip 12200 further includes one or more interface circuits 12502. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 12200 further includes one or more memories 12203 for storing data. Alternatively, all or part of memories 12203 may be located external to chip 12200. Optionally, interface circuit 12502 is connected to memory 12203 and may be configured to receive data from memory 12203 or other devices, or to send data to memory 12203 or other devices. For example, interface circuit 12502 may read data stored in memory 12203 and send the data to processor 12501.

[0250] In some embodiments, the interface circuit 12502 performs at least one of the communication steps (e.g., steps S501 and S502, but not limited thereto) of the sending and / or receiving in the above-described method. For example, the interface circuit 12502 performing the communication steps (e.g., steps S501 and S502, but not limited thereto) of the above-described method means that the interface circuit 12502 performs data exchange between the processor 12501, the chip 12200, the memory 12203, or the transceiver device. In some embodiments, the processor 12501 performs at least one of the other steps (e.g., steps S501 and S502, but not limited thereto).

[0251] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0252] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 12100, the communication device 12100 is caused to execute 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.

[0253] The present disclosure also provides a program product, which, when executed by the communication device 12100, enables the communication device 12100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0254] 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 signal sending method, It is characterized in that The method is performed by a first terminal and includes: Determine, in the unlicensed frequency band resource pool, a subchannel corresponding to a resource used for transmitting a physical direct link channel; According to the association relationship between the subchannel and the direct link positioning reference signal resource, determining, in the subchannel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with at least one subchannel; A direct link positioning reference signal is sent in the direct link positioning reference signal resource.

2. The method according to claim 1, It is characterized in that The physical direct link channel includes at least one of the following: Physical direct link control channel; Physical direct links share the channel.

3. The method according to any one of claims 1 to 2, It is characterized in that The bandwidth corresponding to the direct link positioning reference signal resource associated with the sub-channel is continuous in the unlicensed frequency band.

4. The method according to any one of claims 1 to 3, It is characterized in that The direct link positioning reference signal resources associated with the sub-channels include direct link positioning reference signal resources based on grid multiplexing.

5. The method according to any one of claims 1 to 4, It is characterized in that The first terminal does not transmit a physical direct link channel on the direct link positioning reference signal resource.

6. The method according to any one of claims 1 to 5, It is characterized in that The direct link positioning reference signal resource occupies multiple sub-channels, and a guard band exists between the multiple sub-channels. It is determined that the direct link positioning reference signal resource includes resources corresponding to a physical resource block in the guard band.

7. The method according to any one of claims 1 to 6, It is characterized in that The resource pool includes: sub-channels associated with direct link positioning reference signal resources, and sub-channels not associated with direct link positioning reference signal resources.

8. The method according to claim 7, It is characterized in that The first terminal does not select a sub-channel in the resource pool that has no association with a direct link positioning reference signal resource.

9. The method according to any one of claims 1 to 8, It is characterized in that The determining, in a sub-channel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with at least one sub-channel comprises: A direct link positioning reference signal resource associated with a subchannel corresponding to a first index is determined in a subchannel corresponding to the resource used to transmit a physical direct link channel.

10. The method according to claim 9, It is characterized in that The first index includes at least one of the following: lowest index; The highest index.

11. The method according to any one of claims 1 to 10, It is characterized in that The starting time domain unit of the at least one subchannel is used for automatic gain control, and the starting time domain unit of the direct link positioning reference signal resource is used for automatic gain control.

12. The method according to claim 11, It is characterized in that The direct link positioning reference signal sequence corresponding to the starting time domain unit of the direct link positioning reference signal resource and the resources used are the same as the direct link positioning reference signal sequence corresponding to the last time domain unit occupied by the direct link positioning reference signal resource and the frequency domain resources used.

13. The method according to any one of claims 1 to 12, It is characterized in that The transmit power of the physical direct link channel in the at least one subchannel is equal to the transmit power of the direct link positioning reference signal in the direct link positioning reference signal resource associated with the at least one subchannel.

14. The method according to claim 13, It is characterized in that The method further comprises: The transmission power of the physical direct link channel transmitted by the at least one subchannel is power enhanced according to the number of physical resource blocks occupied by the information in the at least one subchannel and the number of physical resource blocks occupied by the direct link positioning reference signal in the direct link positioning reference signal resources associated with the at least one subchannel.

15. The method according to any one of claims 1 to 14, It is characterized in that Each sub-channel in the resource pool is associated with a direct link positioning reference signal resource.

16. The method according to any one of claims 1 to 15, It is characterized in that The determining, in a sub-channel corresponding to the resource used to transmit the physical direct link channel, a direct link positioning reference signal resource associated with at least one sub-channel comprises: Determine the direct link positioning reference signal resource associated with each sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel.

17. The method according to any one of claims 1 to 14, It is characterized in that Each subchannel in the resource pool is configured with the same direct link positioning reference signal resource.

18. A signal receiving method, It is characterized in that The method is performed by the second terminal, and includes: Receive a direct link positioning reference signal sent by the first terminal according to any one of claims 1 to 17.

19. A signal sending method, It is characterized in that include: The first terminal determines, in the unlicensed frequency band resource pool, a sub-channel corresponding to resources for transmitting a physical direct link channel; The first terminal determines, according to the association relationship between the subchannel and the direct link positioning reference signal resource, a direct link positioning reference signal resource associated with at least one subchannel in the subchannel corresponding to the resource used to transmit the physical direct link channel; The first terminal sends a direct link positioning reference signal on the direct link positioning reference signal resource; The second terminal receives the direct link positioning reference signal.

20. A terminal, It is characterized in that include: The processing module is configured to determine, in the unlicensed frequency band resource pool, a sub-channel corresponding to a resource used to transmit a physical direct link channel; and determine, according to an association relationship between the sub-channel and the direct link positioning reference signal resource, a direct link positioning reference signal resource associated with at least one sub-channel in the sub-channel corresponding to the resource used to transmit the physical direct link channel; The sending module is configured to send a direct link positioning reference signal in the direct link positioning reference signal resource.

21. A terminal, It is characterized in that include: The receiving module is configured to receive a direct link positioning reference signal sent by the first terminal according to any one of claims 1 to 17.

22. A terminal, It is characterized in that include: one or more processors; The terminal is used to execute the signal sending method according to any one of claims 1 to 17.

23. A terminal, It is characterized in that include: one or more processors; Wherein, the network device is used to execute the signal receiving method described in claim 18.

24. A communication system, It is characterized in that It includes a first terminal and a second terminal, wherein the first terminal is configured to implement the signal sending method according to any one of claims 1 to 17, and the second terminal is configured to implement the signal receiving method according to claim 18.

25. A storage medium storing instructions, It is characterized in that When the instruction is executed on the communication device, the communication device executes the signal sending method according to any one of claims 1 to 17 and / or the signal receiving method according to claim 18.

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