Resource determination method, signal sending method, terminal, and communication system

Abstract

The embodiments of the present disclosure relate to a resource determination method, a signal sending method, a terminal, and a communication system. The resource determination method is applied to a first terminal, and comprises: receiving first-order SCI, and determining a DMRS pattern and a target DMRS symbol in the DMRS pattern, wherein the target DMRS symbol is used for decoding second-order SCI, and the target DMRS symbol comprises the first M DMRS symbols in the DMRS pattern in terms of the orders thereof. Only M DMRSs in the current DMRS pattern are used to perform PSSCH demodulation / decoding on the second-order SCI, and the other PSSCH DMRS symbols are used as resources for receiving an SL-PRS; and the sending of the SL-PRS in a shared resource pool is enhanced, such that the SL-PRS can be sent by using some of the PSSCH DMRS symbols, so as to support positioning services corresponding to a larger number of SL-PRS symbols.

Description

Resource determination method, signal sending method, terminal and communication system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a resource determination method, a signal sending method, a terminal, and a communication system. Background Art

[0002] Among the mobile communication technologies currently under investigation, research on sidelink positioning is ongoing. Specifically, sidelink positioning is performed based on the sidelink (SL) between terminal devices to achieve the positioning of the terminal device. For example, sidelink-based positioning can include absolute positioning, relative positioning, and ranging. Therefore, the terminal device needs to select resources for sending the sidelink-positioning reference signal (SL-PRS) to achieve the purpose of positioning on the direct link.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a resource determination method, a signal transmission method, a terminal, and a communication system, so as to provide a way to enhance the transmission of SL-PRS in a shared resource pool.

[0005] In one aspect, an embodiment of the present disclosure provides a resource determination method, applied to a first terminal, the method comprising:

[0006] receiving a first-order SCI, determining a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0007] The target DMRS symbol is used to decode the second-order SCI;

[0008] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0009] On the other hand, an embodiment of the present disclosure further provides a signal sending method, the method comprising:

[0010] Sending a first-order SCI to a first terminal, instructing the first terminal to use a target DMRS symbol to decode the second-order SCI;

[0011] The target DMRS symbol is determined by the first terminal receiving the first-order SCI, determining the DMRS pattern and from the DMRS pattern; the target DMRS symbol includes: the first M DMRS symbols arranged in the DMRS pattern, where M is a positive integer.

[0012] On the other hand, an embodiment of the present disclosure further provides a terminal, which is a first terminal and includes:

[0013] a receiving module, configured to receive a first-order SCI, determine a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0014] The target DMRS symbol is used to decode the second-order SCI;

[0015] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0016] On the other hand, an embodiment of the present disclosure further provides a terminal, which is a second terminal and includes:

[0017] A sending module, configured to send a first-order SCI to a first terminal, instructing the first terminal to use a target DMRS symbol to decode the second-order SCI;

[0018] The target DMRS symbol is determined by the first terminal receiving the first-order SCI, determining the DMRS pattern and from the DMRS pattern; the target DMRS symbol includes: the first M DMRS symbols arranged in the DMRS pattern, where M is a positive integer.

[0019] On the other hand, an embodiment of the present disclosure further provides a terminal, including:

[0020] one or more processors;

[0021] The terminal is used to execute the resource determination method described in the embodiment of the present disclosure.

[0022] On the other hand, an embodiment of the present disclosure further provides a terminal, including:

[0023] one or more processors;

[0024] The terminal is used to execute the signal sending method described in the embodiment of the present disclosure.

[0025] An embodiment of the present disclosure further provides a communication system, including a first terminal and a second terminal; wherein the first terminal is configured to implement the resource determination method described in the embodiment of the present disclosure, and the second terminal is configured to implement the signal sending method described in the embodiment of the present disclosure.

[0026] An embodiment of the present disclosure further provides a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the resource determination method described in the embodiment of the present disclosure, or executes the signal sending method described in the embodiment of the present disclosure.

[0027] In an embodiment of the present disclosure, a first-order SCI is received, a DMRS pattern and a target DMRS symbol within the DMRS pattern are determined; wherein the target DMRS symbol is used to decode a second-order SCI; the target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, only the M DMRS within the current DMRS pattern are used for PSSCH demodulation / decoding of the 2nd SCI, and other PSSCH DMRS symbols are used as resources for receiving SL-PRS; by enhancing the transmission of SL-PRS within a shared resource pool, SL-PRS can be transmitted using part of the PSSCH DMRS symbols to support positioning services corresponding to a larger number of SL-PRS symbols.

[0028] Additional aspects and advantages of the embodiments of the present disclosure will be given in part in the following description, which will become apparent from the following description or be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0030] FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0031] FIG2 is an exemplary interaction diagram of a method provided according to an embodiment of the present disclosure;

[0032] FIG3 is one of the exemplary schematic diagrams of a method provided according to an embodiment of the present disclosure;

[0033] FIG4 is a second exemplary schematic diagram of a method provided according to an embodiment of the present disclosure;

[0034] FIG5 is a third exemplary schematic diagram of a method provided according to an embodiment of the present disclosure;

[0035] FIG6 is a flow chart of a resource determination method according to an embodiment of the present disclosure;

[0036] FIG7 is a schematic diagram of a flow chart of a signal sending method according to an embodiment of the present disclosure;

[0037] FIG8 is a schematic diagram of a terminal structure according to an embodiment of the present disclosure;

[0038] FIG9 is a second schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure;

[0039] FIG10 is a third schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure;

[0040] FIG11 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] The embodiments of the present disclosure provide a resource determination method, a signal sending method, a terminal, and a communication system.

[0042] In a first aspect, an embodiment of the present disclosure provides a resource determination method, applied to a first terminal, the method comprising:

[0043] receiving a first-order SCI, determining a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0044] The target DMRS symbol is used to decode the second-order SCI;

[0045] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0046] In the above embodiment, only the M DMRSs in the current DMRS pattern are used for PSSCH demodulation / decoding of the 2nd SCI, and the other PSSCH DMRS symbols are used as resources for receiving SL-PRS; by enhancing the transmission of SL-PRS in the shared resource pool, SL-PRS can be transmitted using part of the PSSCH DMRS symbols to support positioning services corresponding to a larger number of SL-PRS symbols.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, determining the target DMRS symbol within the DMRS pattern includes:

[0048] The number of DMRS symbols in the DMRS pattern is equal to a first value, and M is determined to be a second value; wherein the second value is less than the first value;

[0049] or

[0050] The number of DMRS symbols in the DMRS pattern is greater than the first value, and M is determined to be a third value; wherein the third value is greater than the second value.

[0051] In the above embodiment, the first value may be a positive integer serving as a threshold for the number of DMRS symbols. The second value is less than the first value to ensure that there are remaining PSSCH DMRS symbols as resources for receiving SL-PRS. The third value is greater than the second value. When the number of DMRS symbols is large, more target DMRS symbols are reserved for decoding the second-order SCI to ensure the relevant performance of decoding the second-order SCI.

[0052] In combination with some embodiments of the first aspect, in some embodiments, the third value is a preconfigured value in the resource pool, or a value that has a mapping relationship with the number of DMRS symbols.

[0053] In the above embodiment, the third value may be a value pre-configured in the resource pool to meet the requirements of target DMRS symbols in different scenarios; the third value may also be a value implicitly mapped to the number of symbols in the DMRS pattern.

[0054] In conjunction with some embodiments of the first aspect, in some embodiments, determining a DMRS pattern and a target DMRS symbol within the DMRS pattern includes:

[0055] Determine the DMRS pattern based on the number of pre-configured PSCCH symbols in the resource pool;

[0056] A target DMRS symbol in the DMRS pattern is determined according to the number of DMRS symbols in the DMRS pattern.

[0057] In the above embodiment, the DMRS pattern is first determined according to the number of PSCCH symbols, and then the target DMRS symbol is determined within the DMRS pattern. Only the target DMRS symbol within the current DMRS pattern is used for PSSCH demodulation / decoding of the 2nd SCI, while other PSSCH DMRS symbols are used as resources for receiving SL-PRS.

[0058] In conjunction with some embodiments of the first aspect, in some embodiments, the DMRS pattern is preconfigured in a resource pool;

[0059] or

[0060] At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

[0061] In the above embodiment, the DMRS pattern is preconfigured in the resource pool. For example, the configured DMRS pattern is indicated by the "sl-PSSCH-DMRS-TimePatternList" parameter. If at least two candidate DMRS patterns are preconfigured in the resource pool, the DMRS pattern field in the 1st SCI indicates which candidate DMRS pattern is used.

[0062] In combination with some embodiments of the first aspect, in some embodiments, the content indicated by the preconfigured first parameter in the resource pool is PSCCH, and the DMRS symbol indicating the PSCCH is determined to be used for L1 RSPR measurement and / or sensing.

[0063] In the above embodiment, the first parameter, for example, sl-RS-ForSensing, indicates that the content of the sl-RS-ForSensing pre-configured for the resource element RE in the resource pool is PSCCH, that is, it indicates that the DMRS symbol of the RE is used for reference signal received power (RSRP) measurement and / or sensing.

[0064] In conjunction with some embodiments of the first aspect, in some embodiments, after determining the target DMRS symbol in the DMRS pattern, the method further includes:

[0065] A second-order SCI sent by a second terminal is received, and the second-order SCI is decoded using the target DMRS symbol.

[0066] In the above embodiment, the first terminal only uses the M DMRSs in the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as resources for receiving SL-PRS; by enhancing the transmission of SL-PRS in the shared resource pool, SL-PRS can be transmitted using part of the PSSCH DMRS symbols.

[0067] In combination with some embodiments of the first aspect, in some embodiments, the SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, determining that the second terminal sends a side link positioning reference signal SL-PRS in the side link Sidelink.

[0068] In the above embodiment, the target format implicitly indicates that the second terminal should send the sidelink positioning reference signal SL-PRS in the sidelink. Alternatively, the reserved bit in the first-order SCI may be used to indicate that the current sidelink transmission includes the SL-PRS, so as to notify the first terminal to receive the SL-PRS.

[0069] In combination with some embodiments of the first aspect, in some embodiments, after decoding the second-order SCI using the target DMRS symbol, the method includes:

[0070] Determining, according to information indicated in the second-order SCI, symbol information of a transmit symbol used by the second terminal to transmit the SL-PRS;

[0071] The symbol information includes at least two of the following:

[0072] The starting symbol information, ending symbol information and number of consecutive symbols of the sending symbol.

[0073] In the above embodiment, the second terminal indicates the specific symbol used by the SL-PRS in the sent 2nd SCI; for example, it may indicate the starting symbol and / or the number of consecutive symbols of the SL-PRS; optionally, the number of these symbols is included in the following Table 1. d symbol.

[0074] In combination with some embodiments of the first aspect, in some embodiments, the transmitted symbol includes: a symbol used to send a DMRS symbol, and the DMRS symbol is used to decode the SL-PRS.

[0075] In the above embodiment, if the SL-PRS symbol indicated in the transmission symbol includes a symbol originally used to transmit a DMRS, the symbol is used for mapping the SL-PRS and is no longer used for mapping the PSSCH DMRS.

[0076] In combination with some embodiments of the first aspect, in some embodiments, the second-order SCI carries a third parameter, and the third parameter indicates that SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

[0077] In the above embodiment, the second terminal 102 may also explicitly indicate the l in Table 1. d The last few DMRS symbols in the symbol are used for SL-PRS transmission; this can be specifically indicated by the third parameter in the 2nd SCI.

[0078] In conjunction with some embodiments of the first aspect, in some embodiments, the third parameter is carried in the second-order SCI. Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

[0079] In the above embodiment, the third parameter is used to indicate that the SL-PRS is sent in the last K DMRS symbols, so that the first terminal 101 can receive the SL-PRS in the last K DMRS symbols.

[0080] In a second aspect, an embodiment of the present disclosure provides a signal transmission method, which is applied to a second terminal. The method includes:

[0081] Sending a first-order SCI to a first terminal, instructing the first terminal to receive the first-order SCI, and determining a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0082] The target DMRS symbol is used to decode the second-order SCI;

[0083] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0084] In the above embodiment, a first-order SCI is sent to the first terminal, instructing the first terminal to receive the first-order SCI, and determining the DMRS pattern and the target DMRS symbol within the DMRS pattern, so that the second terminal only uses the M DMRSs within the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as resources for sending SL-PRS; by enhancing the sending of SL-PRS within the shared resource pool, SL-PRS can be sent using part of the PSSCH DMRS symbols to support positioning services corresponding to a larger number of SL-PRS symbols.

[0085] In conjunction with some embodiments of the second aspect, in some embodiments, the number of DMRS symbols in the DMRS pattern is equal to a first value, and M is a second value; wherein the second value is less than the first value;

[0086] The DMRS symbol in the DMRS pattern is greater than the first value, and M is a third value; wherein the third value is greater than the second value.

[0087] In combination with some embodiments of the second aspect, in some embodiments, the third value is a preconfigured value in the resource pool, or a value that has a mapping relationship with the number of DMRS symbols.

[0088] In conjunction with some embodiments of the second aspect, in some embodiments, the DMRS pattern is preconfigured in a resource pool;

[0089] or

[0090] At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

[0091] In combination with some embodiments of the second aspect, in some embodiments, the SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, indicating that the first terminal sends an edge link positioning reference signal SL-PRS in the edge link.

[0092] In combination with some embodiments of the second aspect, in some embodiments, the transmitted symbols include: symbols used to send DMRS, and the symbols used to send DMRS are used to decode the SL-PRS DDMRS symbols, and the DMRS symbols are used to decode the SL-PRS.

[0093] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0094] Sending a second-order SCI to the first terminal, where the second-order SCI carries indication information, instructing the first terminal to send symbol information of a transmit symbol used by the SL-PRS;

[0095] The symbol information includes at least two of the following:

[0096] The starting symbol information, ending symbol information and number of consecutive symbols of the sending symbol.

[0097] In conjunction with some embodiments of the second aspect, in some embodiments, sending the second-order SC to the first terminal includes:

[0098] The second-order SCI carries a third parameter, where the third parameter indicates that the SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

[0099] In conjunction with some embodiments of the second aspect, in some embodiments, the third parameter is carried in the second-order SCI. Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

[0100] In a third aspect, an embodiment of the present disclosure further provides a terminal, comprising a receiving module; wherein the terminal is used to execute the optional implementation method of the first aspect.

[0101] In a fourth aspect, an embodiment of the present disclosure further provides a terminal, comprising: a sending module; wherein the terminal is used to execute the optional implementation method of the second aspect.

[0102] In a fifth aspect, an embodiment of the present disclosure further provides a terminal, including:

[0103] one or more processors;

[0104] The terminal is used to execute the optional implementation of the first aspect.

[0105] In a sixth aspect, an embodiment of the present disclosure further provides a terminal, including:

[0106] one or more processors;

[0107] The terminal is used to execute the optional implementation of the second aspect.

[0108] In the seventh aspect, an embodiment of the present disclosure further provides a communication system, comprising a first terminal and a second terminal; wherein the first terminal is configured to execute the optional implementation method as described in the first aspect, and the second terminal is configured to execute the optional implementation method as described in the second aspect.

[0109] In an eighth aspect, an embodiment of the present disclosure further provides a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute the optional implementation methods described in the first and second aspects.

[0110] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0111] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0112] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0113] It is understandable that the first terminal, the second terminal communication system, the storage medium, the program product, the computer program, the chip, or the chip system are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0114] The present disclosure provides a resource determination method, a signal transmission method, a terminal, and a communication system. In some embodiments, the terms resource determination method, resource selection method, and resource determination method are interchangeable; the terms signal transmission method, signal processing method, and resource determination method are interchangeable; and the terms information processing system and communication system are interchangeable.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0119] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0120] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0121] 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, A and B are selected for execution (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The same applies when there are more branches, such as A, B, and C.

[0122] 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.

[0123] 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 restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0128] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0129] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or 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)", etc.

[0130] In some embodiments, "terminal" or "terminal device" may be referred to as "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.

[0131] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0132] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0133] 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.

[0134] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0135] As shown in FIG1 , a communication system 100 includes a first terminal 101 and a second terminal 102 .

[0136] In some embodiments, the first terminal 101 and the second terminal 102 include, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but are not limited thereto.

[0137] 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.

[0138] 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.

[0139] 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, systems utilizing other resource determination methods, and next-generation systems based on and extending these systems. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0140] FIG2 is a schematic diagram illustrating the interaction between a resource determination method and a signal transmission method according to an embodiment of the present disclosure. As shown in FIG2 , the method includes:

[0141] In step 201 , the second terminal 102 sends a first-order SCI (1st SCI) to the first terminal 101 .

[0142] The second terminal 102 is, for example, a transmitter of SL-PRS, and the first terminal 101 is, for example, a receiver of SL-PRS.

[0143] SCI may include first-order SCI (1st SCI) and second-order SCI (2nd-CSI). Specifically, the first SCI may be carried by a physical sidelink control channel (PSCCH) and may include at least one of the following: priority indication information, PSSCH time-frequency resource indication information, and modulation and coding scheme (MCS) indication information.

[0144] Optionally, the second terminal 102 sends the first-order SCI to the first terminal 101, and may include information such as the SCI format of the second-order SCI indicated in the first-order SCI.

[0145] In step 202 , the first terminal 101 receives a first-order SCI and determines a demodulation reference signal (DMRS) pattern and a target DMRS symbol within the DMRS pattern.

[0146] Among them, the target DMRS symbol is used to decode the second-order SCI; it can be understood that, in the embodiment of the present disclosure, decoding on a certain symbol can be receiving and decoding on the symbol; for example, decoding SL-PRS on a certain symbol is equivalent to receiving SL-PRS on the symbol and decoding SL-PRS.

[0147] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0148] Among them, 2nd-CSI represents the second-order SCI, which specifically uses the resources or part of the resources of the physical sidelink shared channel (PSSCH), and may include, for example, at least one of the following messages: layer 1 (layer 1, L1) source (source) ID, destination (destination) ID, hybrid automatic repeat request (HARQ) process (processing) indication information, physical sidelink feedback channel (PSFCH) resource indication information, etc.

[0149] Specifically, before decoding data, the first terminal 101 needs to decode the 2nd SCI to obtain key information such as the terminal ID, HARQ process ID, redundancy version, and cast type, which is used to decode subsequent PSSCH data. In other words, the first terminal 101 needs to decode the 2nd SCI before obtaining the symbol occupied by the SL-PRS and decoding the SL-PRS. The resources occupied by the second-order SCI and the SL-PRS resources need to be time-division multiplexed. Therefore, the second terminal 102 can only send the SL-PRS after the symbol at which the second-order SCI ends.

[0150] The first terminal 101 receives the first-order SCI, and determines the DMRS pattern and the target DMRS symbol within the DMRS pattern based on the first-order SCI; the target DMRS symbol is used to decode the second-order SCI, and for SL-PRS transmission, it is usually not sent using the same symbol as the DMRS. Therefore, after excluding the target DMRS symbol actually used to decode the second-order SCI, the SL-PRS symbol can be decoded on other available symbols (available symbols, for example: resources originally used to send DMRS symbols, specifically for example, PSSCH DMRS symbol).

[0151] Specifically, the positioning reference signal (PRS) (i.e., SL-PRS) on the sidelink can share a resource pool with sidelink communication (or sidelink data). It is understood that the shared resource pool, for example, a shared resource pool, includes a set of time domain resources and a set of frequency domain resources transmitted during sidelink communication.

[0152] When performing sidelink transmission, the sidelink data and SL-PRS are sent in the same time slot, and the sidelink data PSSCH. For example, for the resource pool shared by sidelink communication and SL-PRS, the following candidate resource combinations can be supported: comb size 1, where (M, N) includes (1, 2), (2, 2), (2, 4), and (4, 4); and patterns supporting comb size 1, comb size 2, and M>N; where N represents the comb tooth size and M represents the number of symbols occupied by SL-PRS. As a first example, as shown in Figure 3, Figure 3 shows a schematic diagram of the patterns of comb size (2, 2) and comb size (4, 4).

[0153] SL-PRS transmission is typically not performed using the same symbols as DMRS, and some unusable symbols may exist in the time slot. As a second example, as shown in Figure 4 , for SL-PRS with a comb size of (4, 4), the first time slot (slot 2) can be transmitted; however, due to the presence of unusable symbols in the second time slot (slot 13), insufficient usable symbols remain. Therefore, the second time slot cannot meet the aforementioned requirements and cannot transmit SL-PRS.

[0154] Therefore, if the PSSCH DMRS symbol in the current resource pool cannot be used for sending SL-PRS, the corresponding positioning service may not be supported in the resource pool, and the number of symbols that can be used to send SL-PRS will be reduced. In the embodiment of the present disclosure, the first terminal 101 receives the first-order SCI, determines the DMRS pattern and the target DMRS symbol in the DMRS pattern based on the first-order SCI, and decodes the second-order SCI using only the target DMRS symbol, and receives SL-PRS in other resources originally used to send DMRS symbols (such as PSSCH DMRS symbol), so that SL-PRS can be sent using part of the PSSCH DMRS symbol to support positioning services corresponding to a larger number of SL-PRS symbols.

[0155] It should be noted that, for the convenience of description, in the subsequent embodiments of the present disclosure, PSSCH DMRS symbol is used to represent the resources originally used to send DMRS symbols.

[0156] Furthermore, the target DMRS symbol includes: the first M DMRS symbols arranged in the order of the DMRS pattern, where M is a positive integer; for example, if M is 1, it means that the first terminal 101 only uses the first DMRS in the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as resources for receiving SL-PRS. Alternatively, if M is a positive integer greater than 1, it means that the first terminal 101 only uses M (greater than 1) DMRS in the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as decoding SL-PRS.

[0157] Still referring to FIG4 , the second time slot (slot13) in FIG4 originally uses symbol 1 (symbol 1 is the symbol position of the number 1 indicated by the s1 symbol index) and symbol 5 (symbol 5 is the symbol position of the number 5 indicated by the s1 symbol index) to decode the second-order SCI, resulting in the inability to receive the SL-PRS of comb size (4, 4). However, according to the method provided by the embodiment of the present disclosure, as a second example, as shown in FIG5 , if only the first DMRS (symbol 1) in the current DMRS pattern is used for PSSCH demodulation / decoding of the 2nd SCI, then symbol 5 can be used for SL-PRS decoding (or SL-PRS reception), and the time slot can be used for SL-PRS reception of comb size (4, 4).

[0158] In an embodiment of the present disclosure, the first terminal 101 receives a first-order SCI, determines a DMRS pattern and a target DMRS symbol within the DMRS pattern; wherein the target DMRS symbol is used to decode a second-order SCI; the target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, only using the M DMRS within the current DMRS pattern for PSSCH demodulation / decoding of the 2nd SCI, and using other PSSCH DMRS symbols as resources for receiving SL-PRS; by enhancing the transmission of SL-PRS within a shared resource pool, SL-PRS can be transmitted using part of the PSSCH DMRS symbols to support positioning services corresponding to a larger number of SL-PRS symbols.

[0159] In some embodiments, step 202 includes:

[0160] Step 2021: The number of DMRS symbols in the DMRS pattern is equal to a first value, and M is determined to be a second value; wherein the second value is smaller than the first value;

[0161] or

[0162] Step 2022: If the number of DMRS symbols in the DMRS pattern is greater than the first value, determine M to be a third value; wherein the third value is greater than the second value.

[0163] The first value may be a positive integer serving as a threshold for the number of DMRS symbols. The second value is less than the first value to ensure that there are remaining PSSCH DMRS symbols as resources for receiving SL-PRS. The third value is greater than the second value. When the number of DMRS symbols is large, more target DMRS symbols are reserved for decoding the second-order SCI to ensure the relevant performance of decoding the second-order SCI.

[0164] For example, if the first value is 2, and the second value is 1, that is, the number of DMRS symbols is 2, in step 2021, the first terminal 101 only uses the first DMRS in the current DMRS pattern for 2nd SCI PSSCH demodulation / decoding, and the other PSSCH DMRS symbols are used as resources for receiving SL-PRS. Since the 2nd SCI is mapped starting from the first DMRS symbol in the slot, there is a high probability that the 2nd SCI can be correctly decoded using only the first DMRS symbol in the slot.

[0165] In step 2022, when the number of DMRS symbols is greater than 2, M is a third value, and the third value is greater than the second value. For example, if the third value is 2, the first terminal 101 only uses the first two DMRSs in the current DMRS pattern for 2nd SCI PSSCH demodulation / decoding, and the other PSSCH DMRS symbols are used as resources for receiving SL-PRS.

[0166] As a third example, see Table 1 below. Table 1 shows the PSSCH DMRS position, the number of PSSCH DMRS, and the number of symbols that can be used by PSCCH and PSSCH. d Examples of relationships between;

[0167] In step 2021, when PSCCH contains 2 or 3 symbols and the number of PSSCH DMRS is 2, the number of symbols that can be used by PSCCH and PSSCH is l d It can be 6; if the number of DMRS symbols is 2, the first DMRS symbol can be used to decode the 2nd SCI, that is, the first symbol is used to decode the 2nd SCI; the next one (that is, the fifth) is used to decode the SL-PRS.

[0168] In step 2022, when the PSCCH DMRS includes 2 or 3 symbols and the number of PSSCH DMRS is 4, the number of symbols that can be used by PSCCH and PSSCH is l d It can be 11, 12, or 13. If the number of DMRS symbols is 4, the first two DMRS symbols can be used to decode the 2nd SCI, i.e. the first and fourth symbols can be used to decode the 2nd SCI; the last two (i.e. the seventh and tenth) can be used to decode the SL-PRS.

[0169] Table 1:

[0170] In some embodiments, the third value is a value preconfigured in the resource pool, or a value that has a mapping relationship with the number of DMRS symbols. The third value may be a value preconfigured in the resource pool to meet the requirements of target DMRS symbols in different scenarios; the third value may also be a value that has an implicit mapping relationship with the number of symbols in the DMRS pattern; for example, if the DMRS pattern contains 4 symbols, the first 2 symbols are used to decode the 2nd SCI, and the aforementioned mapping relationship is equivalent to the number of symbols in the DMRS pattern being 4, and the third value is 2; if it contains 2 or 3 symbols, only the first symbol is used, and the aforementioned mapping relationship is equivalent to the number of symbols in the DMRS pattern being 2 or 3, and the third value is 1.

[0171] In some embodiments, step 202 includes:

[0172] Step 2023: Determine a DMRS pattern based on the number of PSCCH symbols pre-configured in the resource pool;

[0173] Step 2024: Determine a target DMRS symbol in the DMRS pattern according to the number of DMRS symbols in the DMRS pattern.

[0174] The number of PSCCH symbols may be determined by the sl-TimeResourcePSCCH pre-configured in the resource pool.

[0175] First, the DMRS pattern is determined according to the number of PSCCH symbols, and then the target DMRS symbol is determined within the DMRS pattern. Only the target DMRS symbol within the current DMRS pattern is used for PSSCH demodulation / decoding of the 2nd SCI, while other PSSCH DMRS symbols are used as resources for receiving SL-PRS.

[0176] In some embodiments, the DMRS pattern is preconfigured in a resource pool;

[0177] or

[0178] At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

[0179] The DMRS pattern is pre-configured in the resource pool, for example, indicated by the "sl-PSSCH-DMRS-TimePatternList" parameter. If at least two candidate DMRS patterns are pre-configured in the resource pool, the DMRS pattern field in the 1st SCI indicates which candidate DMRS pattern is used.

[0180] In some embodiments, the content indicated by the first parameter preconfigured in the resource pool is PSCCH, and it is determined that the DMRS symbol indicating the PSCCH is used for RSPR measurement and / or sensing of L1 (layer 1, layer1); the first parameter, for example, sl-RS-ForSensing, is preconfigured for the resource element RE in the resource pool, i.e., it indicates that the DMRS symbol of the RE is used for reference signal received power (Reference Signal Receiving Power, RSRP) measurement and / or sensing.

[0181] Step 203 : The second terminal 102 sends a second-order SCI (2nd SCI) to the first terminal 101 .

[0182] Among them, 2nd-CSI represents the second-order SCI, which specifically uses the resources or part of the resources of PSSCH, and may include, for example, at least one of the following messages: layer 1 source UE ID, destination UE ID, HARQ process indication information, etc.

[0183] Step 204: The first terminal 101 receives the second-order SCI sent by the second terminal, and decodes the second-order SCI using the target DMRS symbol.

[0184] Specifically, before decoding the data, the first terminal 101 needs to decode the 2nd SCI to obtain key information such as the terminal ID, HARQ process ID, redundancy version, and cast type, which is used to decode the subsequent PSSCH data. In other words, the first terminal 101 needs to decode the 2nd SCI before obtaining the symbol occupied by the SL-PRS and decoding the SL-PRS. The resources occupied by the second-order SCI and the SL-PRS resources need to be time-division multiplexed. Therefore, the second terminal 102 can only send the SL-PRS after the symbol at which the second-order SCI ends.

[0185] The first terminal 101 only uses the M DMRSs in the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as resources for receiving SL-PRS; by enhancing the transmission of SL-PRS in the shared resource pool, SL-PRS can be transmitted using part of the PSSCH DMRS symbols.

[0186] In some embodiments, the SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, which determines that the second terminal sends a side link positioning reference signal SL-PRS in the side link.

[0187] The target format, for example, format 2-D, implicitly indicates that the second terminal 102 should transmit a sidelink positioning reference signal SL-PRS in the sidelink. A reserved bit in the first-order SCI may also be used to indicate that the current sidelink transmission includes the SL-PRS, thereby notifying the first terminal 101 to receive the SL-PRS.

[0188] Optionally, the first-stage SCI may use SCI format 1-A.

[0189] Step 205: The first terminal 101 determines, based on the information indicated in the second-order SCI, symbol information of the transmission symbols used by the second terminal 102 to transmit the SL-PRS.

[0190] The symbol information includes at least two of the following:

[0191] The starting symbol information, ending symbol information and number of consecutive symbols of the sending symbol.

[0192] The second terminal 102 indicates the specific symbol used by the SL-PRS in the transmitted 2nd SCI; for example, it may indicate the starting symbol and / or the number of consecutive symbols of the SL-PRS; the starting symbol includes the start symbol information and / or the end symbol information. Optionally, the number of these symbols is included in l in Table 1. d symbol.

[0193] In some embodiments, the transmitted symbols include: symbols used to transmit DMRS, and the symbols used to transmit DMRS are used to decode the SL-PRS.

[0194] If the SL-PRS symbol indicated in the transmission symbol includes a symbol originally used to transmit DMRS, then the symbol is used for mapping of SL-PRS and is no longer used for mapping of PSSCH DMRS.

[0195] In some embodiments, the second-order SCI carries a third parameter, and the third parameter indicates that SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

[0196] The second terminal 102 may also explicitly indicate the l in Table 1. d The last few DMRS symbols in the symbol are used for SL-PRS transmission; this can be specifically indicated by the third parameter in the 2nd SCI.

[0197] In some embodiments, the third parameter is carried in the second-order SCI bit; wherein N is the number of DMRS symbols in the pre-configured or second-order SCI indicated DMRS pattern; the SL-PRS is sent in the last K DMRS symbols indicated by the third parameter, so that the first terminal 101 receives the SL-PRS in the last K DMRS symbols.

[0198] Step 206 : The second terminal 102 sends an SL-PRS to the first terminal 101 .

[0199] The second terminal 102 can use the PSSCH DMRS symbol as a resource for sending SL-PRS; by enhancing the transmission of SL-PRS in the shared resource pool, the SL-PRS can be sent using part of the PSSCH DMRS symbol to support positioning services corresponding to a larger number of SL-PRS symbols.

[0200] Step 207: The first terminal 101 receives the SL-PRS.

[0201] The first terminal 101 only uses the M DMRSs in the current DMRS pattern to perform PSSCH demodulation / decoding of the 2nd SCI, and uses other PSSCH DMRS symbols as resources for receiving SL-PRS.

[0202] 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.

[0203] In some embodiments, the terms "codebook," "codeword," and "precoding matrix" may be used interchangeably. For example, a codebook may be a collection of one or more codewords / precoding matrices.

[0204] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "side link", "direct connection communication", "side link communication" can be interchangeable with each other.

[0205] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0206] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0207] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0208] In some embodiments, the terms "search space", "search space set", "search space configuration", "search space set configuration", "control resource set (CORESET)", "CORESET configuration" and the like may be used interchangeably.

[0209] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0210] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0211] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0212] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", "resource element (RE)", and "sub-carrier" can be used interchangeably.

[0213] In some embodiments, terms such as wireless access scheme and waveform may be used interchangeably.

[0214] In some embodiments, the terms "precoding", "precoder", "weight", "precoding weight", "quasi-co-location (QCL)", "transmission configuration indication (TCI) state", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "the number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angular degree", "antenna", "antenna element", "panel" and the like can be used interchangeably.

[0215] 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.

[0216] 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.

[0217] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0218] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0219] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0220] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0221] The resource determination method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, steps 201, 202, 203, 204, and 205 may be implemented as independent embodiments; the combination of steps 201 and 202 may be implemented as an independent embodiment; the combination of steps 202 and 203 may be implemented as an independent embodiment; the combination of steps 203 and 204, and the combination of steps 205, 206, and 207 may be implemented as independent embodiments, but are not limited thereto.

[0222] In some embodiments, step 202 and step 203 may be performed in an interchangeable order or simultaneously.

[0223] In some embodiments, step 2023 and step 2024 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0224] In some embodiments, step 2021 and step 2022 may be performed in an interchangeable order or simultaneously.

[0225] In some embodiments, step 203, step 204, step 205, step 206, and step 207 are all optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0226] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0227] FIG6 is a flow chart of a resource determination method according to an embodiment of the present disclosure.

[0228] As shown in FIG6 , the above method may be applied to the first terminal 101, and the above method includes:

[0229] Step 601: Receive a first-order SCI, determine a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0230] The target DMRS symbol is used to decode the second-order SCI;

[0231] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0232] The optional implementation of step 601 can refer to the optional implementation of step 201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0233] In some embodiments, determining a target DMRS symbol within a DMRS pattern includes:

[0234] Step 6021: The number of DMRS symbols in the DMRS pattern is equal to a first value, and M is determined to be a second value; wherein the second value is smaller than the first value;

[0235] or

[0236] Step 6022: If the number of DMRS symbols in the DMRS pattern is greater than the first value, determine M to be a third value; wherein the third value is greater than the second value.

[0237] Optionally, in an embodiment of the present disclosure, the third value is a value preconfigured in the resource pool, or a value having a mapping relationship with the number of DMRS symbols.

[0238] Optionally, in the embodiment of the present disclosure, determining a DMRS pattern and a target DMRS symbol within the DMRS pattern includes:

[0239] Step 6023: Determine a DMRS pattern based on the number of pre-configured PSCCH symbols in the resource pool;

[0240] Step 6024: Determine a target DMRS symbol in the DMRS pattern according to the number of DMRS symbols in the DMRS pattern.

[0241] Optionally, in an embodiment of the present disclosure, the DMRS pattern is preconfigured in a resource pool;

[0242] or

[0243] At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

[0244] Optionally, in an embodiment of the present disclosure, the content indicated by the preconfigured first parameter in the resource pool is PSCCH, and the DMRS symbol indicating the PSCCH is determined to be used for L1 RSPR measurement and / or sensing.

[0245] Optionally, in the embodiment of the present disclosure, after determining the target DMRS symbol in the DMRS pattern, the method further includes:

[0246] Step 604: Receive the second-order SCI sent by the second terminal, and use the target DMRS symbol to decode the second-order SCI.

[0247] Optionally, in an embodiment of the present disclosure, the SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, determining that the second terminal sends a side link positioning reference signal SL-PRS in the side link.

[0248] Optionally, in the embodiment of the present disclosure, after decoding the second-order SCI using the target DMRS symbol, the method includes:

[0249] Step 605: Determine, based on the information indicated in the second-order SCI, symbol information of a transmission symbol used by the second terminal to transmit the SL-PRS;

[0250] The symbol information includes at least two of the following:

[0251] The starting symbol information, ending symbol information and number of consecutive symbols of the sending symbol.

[0252] Optionally, in an embodiment of the present disclosure, the transmitted symbol includes: a symbol for transmitting a DMRS symbol, and the DMRS symbol is used to decode the SL-PRS.

[0253] Optionally, in an embodiment of the present disclosure, the second-order SCI carries a third parameter, and the third parameter indicates that SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

[0254] Optionally, in the embodiment of the present disclosure, the third parameter is carried in the second-order SCI Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

[0255] The resource determination method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, steps 601, 602, 604, and 605 may be implemented as independent embodiments; the combination of steps 601 and 602 may be implemented as an independent embodiment; and the combination of steps 605, 606, and 607 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0256] In some embodiments, step 6023 and step 6024 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0257] In some embodiments, step 6021 and step 6022 may be executed in an interchanged order or simultaneously.

[0258] In some embodiments, step 604 and step 605 are both optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0259] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 6 .

[0260] FIG7 is a schematic flow chart of a signal sending method according to an embodiment of the present disclosure.

[0261] As shown in FIG7 , the above method may be applied to the second terminal 102, and the above method includes:

[0262] Step 701: Send a first-order SCI to a first terminal, instructing the first terminal to receive the first-order SCI and determine a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0263] The target DMRS symbol is used to decode the second-order SCI;

[0264] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0265] Optionally, in an embodiment of the present disclosure, the number of DMRS symbols in the DMRS pattern is equal to a first value, and M is a second value; wherein the second value is smaller than the first value;

[0266] The DMRS symbol in the DMRS pattern is greater than the first value, and M is a third value; wherein the third value is greater than the second value.

[0267] Optionally, in an embodiment of the present disclosure, the third value is a value preconfigured in the resource pool, or a value having a mapping relationship with the number of DMRS symbols.

[0268] Optionally, in an embodiment of the present disclosure, the DMRS pattern is preconfigured in a resource pool;

[0269] or

[0270] At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

[0271] Optionally, in an embodiment of the present disclosure, the SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, indicating that the first terminal sends a side link positioning reference signal SL-PRS in the side link.

[0272] Optionally, in the embodiment of the present disclosure, the method further includes:

[0273] Step 703: Send a second-order SCI to the first terminal, where the second-order SCI carries indication information, instructing the first terminal to send symbol information of the transmission symbols used by the SL-PRS;

[0274] The symbol information includes at least two of the following:

[0275] The starting symbol information, ending symbol information and number of consecutive symbols of the sending symbol.

[0276] Optionally, in an embodiment of the present disclosure, the transmitted symbols include: symbols used to transmit DMRS, and the symbols used to transmit DMRS are used to decode the SL-PRS.

[0277] Optionally, in the embodiment of the present disclosure, sending the second-order SCI to the first terminal includes:

[0278] The second-order SCI carries a third parameter, where the third parameter indicates that the SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

[0279] Optionally, in the embodiment of the present disclosure, the third parameter is carried in the second-order SCI Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

[0280] Optionally, in the embodiment of the present disclosure, the method further includes:

[0281] Step 706: Send SL-PRS to the first terminal 101.

[0282] The second terminal can use the PSSCH DMRS symbol as a resource for receiving SL-PRS; by enhancing the transmission of SL-PRS in the shared resource pool, the SL-PRS can be sent using part of the PSSCH DMRS symbol to support positioning services corresponding to a larger number of SL-PRS symbols.

[0283] The signal transmission method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 701, step 703, and step 706 may be implemented as independent embodiments; the combination of step 701 and step 703 may be implemented as an independent embodiment; and the combination of step 703 and step 706 may be implemented as an independent embodiment, but the present disclosure is not limited thereto.

[0284] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 7 .

[0285] 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.

[0286] 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.

[0287] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, 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, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as 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.

[0288] FIG8 is a schematic diagram of a terminal structure according to an embodiment of the present disclosure. As shown in FIG8 , a terminal 800 may include a receiving module 801 .

[0289] In some embodiments, the receiving module 801 is configured to receive a first-order SCI, determine a DMRS pattern and a target DMRS symbol within the DMRS pattern;

[0290] The target DMRS symbol is used to decode the second-order SCI;

[0291] The target DMRS symbol includes: the first M DMRS symbols arranged in the order in the DMRS pattern, where M is a positive integer.

[0292] Optionally, the above-mentioned resource determination module 802 is used to execute at least one of the communication steps such as resource determination performed by the first terminal 101 in any of the above methods (for example, step 202, step 2021, step 2022, step 2023, step 2024, step 204, step 205, step 207, and step 602, step 6021, step 6022, step 6023, step 6024, step 604, step 605, step 607 but not limited to these), which are not repeated here.

[0293] FIG9 is a second schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG9 , a terminal 900 may include: a sending module 901 .

[0294] In some embodiments, the sending module 901 is configured to send a first-order SCI to a first terminal, instructing the first terminal to use a target DMRS symbol to decode the second-order SCI;

[0295] The target DMRS symbol is determined by the first terminal receiving the first-order SCI, determining the DMRS pattern and from the DMRS pattern; the target DMRS symbol includes: the first M DMRS symbols arranged in the DMRS pattern, where M is a positive integer.

[0296] Optionally, the above-mentioned receiving module 901 is used to execute at least one of the communication steps such as signal sending performed by the second terminal 102 in any of the above methods (for example, step 201, step 203, step 206, step 701, step 703, step 706, but not limited to these), which will not be repeated here.

[0297] Figure 10 is a schematic diagram of the structure of a terminal 1000 (e.g., user equipment) proposed in an embodiment of the present disclosure. Terminal 1000 can be a chip, chip system, or processor that supports a network device implementing any of the above methods, or a chip, chip system, or processor that supports a terminal implementing any of the above methods. Terminal 1000 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.

[0298] As shown in Figure 10, terminal 1000 includes one or more processors 1001. Processor 1001 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Terminal 1000 is used to perform any of the above methods.

[0299] In some embodiments, the terminal 1000 further includes one or more memories 1002 for storing instructions. Optionally, all or part of the memory 1002 may be located outside the terminal 1000.

[0300] In some embodiments, the terminal 1000 further includes one or more transceivers 1004. When the terminal 1000 includes one or more transceivers 1004, the transceiver 1004 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step 201, step 203, step 204, step 206, step 601, step 604, step 701, step 703, step 706, but not limited thereto), and the processor 1001 performs at least one of the other steps (for example, step 202, step 2021, step 2022, step 2023, step 2024, step 205, step 207, and step 602, step 6021, step 6022, step 6023, step 6024, step 605, step 607, but not limited thereto).

[0301] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0302] In some embodiments, terminal 1000 may include one or more interface circuits 1003. Optionally, interface circuit 1003 is connected to memory 1002. Interface circuit 1003 may be configured to receive signals from memory 1002 or other devices, and may be configured to send signals to memory 1002 or other devices. For example, interface circuit 1003 may read instructions stored in memory 1002 and send the instructions to processor 1001.

[0303] The terminal 1000 described in the above embodiment may be a communication device such as a user device, but the scope of the terminal 1000 described in the present disclosure is not limited thereto, and the structure of the terminal 1000 may not be limited by FIG100. 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 and 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.

[0304] FIG11 is a schematic diagram of the structure of a chip 1100 according to an embodiment of the present disclosure. If the terminal 1000 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 1100 shown in FIG11 , but the present disclosure is not limited thereto.

[0305] The chip 1100 includes one or more processors 1101 , and the chip 1100 is configured to execute any of the above methods.

[0306] In some embodiments, chip 1100 further includes one or more 1103. Optionally, interface circuit 1103 is connected to memory 1102. Interface circuit 1103 can be used to receive signals from memory 1102 or other devices, and interface circuit 1103 can be used to send signals to memory 1102 or other devices. For example, interface circuit 1103 can read instructions stored in memory 1102 and send the instructions to processor 1101.

[0307] In some embodiments, the interface circuit 1103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step 201, step 203, step 204, step 206, step 601, step 604, step 701, step 703, step 706, but not limited to these), and the processor 1101 performs at least one of the other steps (for example, step 202, step 2021, step 2022, step 2023, step 2024, step 205, step 207, and step 602, step 6021, step 6022, step 6023, step 6024, step 605, step 607 but not limited to these).

[0308] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0309] In some embodiments, the chip 1100 further includes one or more memories 1102 for storing instructions. Alternatively, all or part of the memory 1102 may be external to the chip 1100.

[0310] The present disclosure also provides a storage medium having instructions stored thereon. When the instructions are executed on the terminal 1300, the terminal 1300 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0311] The present disclosure also provides a program product, which, when executed by the terminal 1300, enables the terminal 1300 to perform any of the above methods. Optionally, the program product is a computer program product.

[0312] 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 resource determination method, applied to a first terminal, characterized in that: The method comprises: receiving a first-order SCI, determining a DMRS pattern and a target DMRS symbol within the DMRS pattern; Wherein, the target DMRS symbol is used to decode the second-order SCI; The target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, where M is a positive integer.

2. The resource determination method according to claim 1, characterized in that: The determining a target DMRS symbol in the DMRS pattern includes: The number of DMRS symbols in the DMRS pattern is equal to a first value, and M is determined to be a second value; wherein the second value is less than the first value; or The number of DMRS symbols in the DMRS pattern is greater than the first value, and M is determined to be a third value; wherein the third value is greater than the second value.

3. The resource determination method according to claim 2, characterized in that: The third value is a value preconfigured in the resource pool, or a value having a mapping relationship with the number of DMRS symbols.

4. The resource determination method according to any one of claims 1 to 3, characterized in that: The determining a DMRS pattern and a target DMRS symbol in the DMRS pattern includes: Determine the DMRS pattern according to the number of PSCCH symbols pre-configured in the resource pool; According to the number of DMRS symbols in the DMRS pattern, a target DMRS symbol in the DMRS pattern is determined.

5. The resource determination method according to claim 4, characterized in that: The DMRS pattern is pre-configured in the resource pool; or At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

6. The resource determination method according to any one of claims 1 to 3, characterized in that: The content indicated by the first parameter preconfigured in the resource pool is PSCCH, and it is determined that the DMRS symbol indicating the PSCCH is used for L1 RSPR measurement and / or sensing.

7. The resource determination method according to claim 1, characterized in that: After determining the target DMRS symbol in the DMRS pattern, the method further includes: A second-order SCI sent by a second terminal is received, and the second-order SCI is decoded using the target DMRS symbol.

8. The resource determination method according to claim 7, characterized in that: The SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, which determines that the second terminal sends a side link positioning reference signal SL-PRS in the side link Sidelink.

9. The resource determination method according to claim 8, characterized in that: After decoding the second-order SCI using the target DMRS symbol, the method includes: Determine, according to the information indicated in the second-order SCI, symbol information of a transmission symbol used by the second terminal to send the SL-PRS; The symbol information includes at least two of the following: The sending symbol includes the start symbol information, the end symbol information and the number of consecutive symbols.

10. The resource determination method according to claim 9, characterized in that: The transmission symbols include: symbols used to send DMRS, and the symbols used to send DMRS are used to decode the SL-PRS.

11. The resource determination method according to any one of claims 7 to 10, characterized in that: The second-order SCI carries a third parameter, and the third parameter indicates that the SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

12. The resource determination method according to claim 11, characterized in that: The third parameter is carried in the second-order SCI Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

13. A signal sending method, applied to a second terminal, characterized in that: The method comprises: Sending a first-order SCI to a first terminal, instructing the first terminal to receive the first-order SCI, and determining a DMRS pattern and a target DMRS symbol in the DMRS pattern; Wherein, the target DMRS symbol is used to decode the second-order SCI; The target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, where M is a positive integer.

14. The signal sending method according to claim 13, characterized in that: The number of DMRS symbols in the DMRS pattern is equal to a first value, and M is a second value; wherein the second value is less than the first value; The DMRS symbol in the DMRS pattern is greater than the first value, and M is a third value; wherein the third value is greater than the second value.

15. The signal transmission method according to claim 14, characterized in that: The third value is a value preconfigured in the resource pool, or a value having a mapping relationship with the number of DMRS symbols.

16. The signal sending method according to any one of claims 13 to 15, characterized in that: The DMRS pattern is pre-configured in the resource pool; or At least two candidate DMRS patterns are preconfigured in the resource pool, and the DMRS pattern is one of the candidate DMRS patterns indicated by the DMRS pattern field of the first-order SCI.

17. The signal sending method according to claim 13, characterized in that: The SCI format of the second-order SCI indicated in the first-order SCI is a target format, or the first-order SCI carries a second parameter, indicating that the first terminal sends a side link positioning reference signal SL-PRS in the side link.

18. The signal sending method according to any one of claims 13 to 15, characterized in that: The method further comprises: Sending a second-order SCI to the first terminal, where the second-order SCI carries indication information, indicating symbol information of a transmission symbol used by the first terminal to send the SL-PRS; The symbol information includes at least two of the following: The sending symbol includes the start symbol information, the end symbol information and the number of consecutive symbols.

19. The signal sending method according to claim 18, characterized in that: The transmission symbols include: symbols used to send DMRS, and the symbols used to send DMRS are used to decode the SL-PRS.

20. The signal transmission method according to claim 18 or 19, characterized in that: The sending the second-order SCI to the first terminal includes: A third parameter is carried in the second-order SCI, where the third parameter indicates that the SL-PRS is sent in the last K DMRS symbols in the DMRS pattern; K is a positive integer.

21. The signal transmission method according to claim 20, characterized in that: The third parameter is carried in the second-order SCI Bit; wherein N is the number of DMRS symbols in the pre-configured or indicated DMRS pattern in the second-order SCI.

22. A terminal, the terminal being a first terminal, characterized in that: The terminal comprises: A receiving module, configured to receive a first-order SCI, determine a DMRS pattern and a target DMRS symbol within the DMRS pattern; Wherein, the target DMRS symbol is used to decode the second-order SCI; The target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, where M is a positive integer.

23. A terminal, the terminal being a second terminal, characterized in that: The terminal comprises: A sending module, configured to send a first-order SCI to a first terminal, instructing the first terminal to decode a second-order SCI using a target DMRS symbol; The target DMRS symbol is determined by the first terminal receiving the first-order SCI, determining the DMRS pattern and from within the DMRS pattern; the target DMRS symbol includes: the first M DMRS symbols arranged in order in the DMRS pattern, where M is a positive integer.

24. A terminal, the terminal being a first terminal, characterized in that: include: one or more processors; The terminal is used to execute the resource determination method according to any one of claims 1 to 12.

25. A terminal, the terminal being a second terminal, characterized in that: include: one or more processors; The terminal is used to execute the signal sending method according to any one of claims 13 to 21.

26. A communication system, characterized in that: It includes a first terminal and a second terminal; wherein the first terminal is configured to implement the resource determination method described in any one of claims 1 to 12, and the second terminal is configured to implement the signal sending method described in any one of claims 13 to 21.

27. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to execute the resource determination method according to any one of claims 1 to 12, or execute the signal sending method according to any one of claims 13 to 21.

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