Reference signal determination method, reference signal processing method and related device

Abstract

This application discloses a reference signal determination method, a reference signal processing method, and related devices, which include performing a first operation when a first target schedules resources of a second target for sidelink (SL) transmission, where the first target and the second target are one of a cell, a frequency point, and a carrier, and the first operation includes determining a target reference signal for path loss measurement of the second target based on a preset reference signal identifier, or determining the target reference signal based on target control signaling on the first target.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to Chinese Patent Application No. 202011112977.4, filed in China on October 16, 2020, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of communication technology, and in particular to a reference signal determination method, a reference signal processing method, and related devices. [Background technology]

[0003] With the development of communication technology, sidelink (SL) transmission has been realized in communication systems. In the scenarios of cross-carrier scheduling and carrier aggregation, to realize SL transmission, the SL resources of a cell can be scheduled on a single cell scheduling. However, if there is no control signaling in the scheduled cell, the terminal cannot perform power control based on the downlink path loss, which results in relatively poor transmission reliability. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a reference signal determination method, a reference signal processing method, and related devices that can solve the problem of relatively poor transmission reliability due to the absence of control signaling in scheduled cells in cross-carrier scheduling and carrier aggregation scenarios. [Means for solving the problem]

[0005] According to a first aspect, there is provided a reference signal determination method executed by a terminal, the method comprising: performing a first operation when a first target schedules resources of a second target for a sidelink SL transmission; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal for a second target path loss measurement based on a preset reference signal identifier; determining the target reference signal based on target control signaling on the first object.

[0006] According to a second aspect, there is provided a reference signal processing method performed by a network device, the method comprising: When the first target schedules resources of the second target to perform sidelink (SL) transmission, the method includes transmitting target control signaling to a terminal on the first target, the target control signaling being used to determine a target reference signal for path loss measurement of the second target.

[0007] According to a third aspect, there is provided a reference signal determination apparatus, the apparatus comprising: an execution module for executing a first operation when a first target schedules resources of a second target for a sidelink SL transmission; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal for a second target path loss measurement based on a preset reference signal identifier; determining the target reference signal based on target control signaling on the first object.

[0008] According to a fourth aspect, there is provided a reference signal processing apparatus, the apparatus comprising: The method includes a transmitting module for transmitting target control signaling to a terminal on the first target when the first target schedules resources of the second target to perform sidelink (SL) transmission, the target control signaling being used to determine a target reference signal for path loss measurement of the second target.

[0009] According to a fifth aspect, there is provided a terminal comprising a processor, a memory and a program or instructions stored in the memory and operable to run on the processor, the program or instructions being operable when executed by the processor to implement the steps of the method of the first aspect.

[0010] According to a sixth aspect, there is provided a network device comprising a processor, a memory, and a program or instructions stored in the memory and operable to run on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of the second aspect.

[0011] According to a seventh aspect, there is provided a readable storage medium having a program or instructions stored thereon, the program or instructions, when executed by a processor, performing steps of the method according to the first aspect or performing steps of the method according to the third aspect.

[0012] According to an eighth aspect, an embodiment of the present application provides a chip, the chip including a processor and a communication interface, the communication interface coupled to the processor, the processor running a network device program or instruction and used to implement the method according to the second aspect.

[0013] According to a ninth aspect, there is provided a computer program product, the computer program product being stored in a non-volatile storage medium, the computer program product being executed by at least one processor to realise the method according to the first aspect or the method according to the second aspect. Effect of the Invention

[0014] In the embodiment of the present application, when the first target schedules resources of the second target to perform sidelink SL transmission, a target reference signal is determined based on a preset reference signal identifier or target control signaling on the first target, so that a path loss measurement result obtained by measuring based on a reference signal corresponding to the target reference signal is set as a path loss measurement result of the second target, and power control is performed on the second target based on the downlink path loss. Therefore, the embodiment of the present application can improve the reliability of transmission. [Brief description of the drawings]

[0015] [Figure 1] 1 is a structural diagram of a network system to which an embodiment of the present application can be applied. [Diagram 2] 2 is a flowchart of a reference signal determination method according to an embodiment of the present application. [Diagram 3] 4 is a flowchart of a reference signal processing method according to an embodiment of the present application. [Figure 4] FIG. 2 is a structural diagram of a reference signal determining device according to an embodiment of the present application; [Diagram 5] FIG. 2 is a structural diagram of a reference signal processing device according to an embodiment of the present application; [Figure 6] FIG. 2 is a structural diagram of a communication device according to an embodiment of the present application; [Figure 7] FIG. 2 is a structural diagram of another terminal according to an embodiment of the present application; [Figure 8] FIG. 2 is a structural diagram of another network device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The following clearly describes the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application are all within the scope of protection of the present application.

[0017] The terms "first," "second," etc. in the specification and claims of the present application are intended to distinguish between similar objects and are not intended to describe a particular order or sequence. It is to be understood that data so used are interchangeable where appropriate, such that the embodiments of the present application may be performed in an order other than that shown or described herein, and that the objects distinguished by "first" and "second" are generally of the same type and do not limit the number of objects, e.g., the first object may be one or more. Note that "and / or" in the specification and claims represents at least one of the objects connected, and the character " / " generally represents an "or" relationship between the related objects.

[0018] It should be noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be applied to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are always used interchangeably, and the techniques described may be used in the above-mentioned systems and radio technologies, or in other systems and radio technologies. However, although the following description describes a New Radio (NR) system for illustrative purposes and uses NR terminology in most of the following description, these techniques may be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

[0019] FIG. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network device 12. Here, the terminal 11 may be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a terminal side device such as a mobile phone, a tablet personal computer, a laptop computer (or called a notebook computer), a personal digital assistant (PDA), a palmtop computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), a wearable device, a vehicle user equipment (VUE), a pedestrian terminal (PUE), etc., and the wearable device includes a bracelet, an earphone, glasses, etc. It should be noted that the specific type of the terminal 11 in the embodiment of the present application is not limited.The network device 12 may be a base station or a core network, where the base station may be called a Node B, an evolved Node B, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a wireless local area network (WLAN) access point, a wireless fidelity (WiFi) node, a transmitting receiving point (TRP), or any other suitable term in the art, and as long as the same technical effect is achieved, the base station is not limited to a specific technical term, and it should be explained that in the embodiments of this application, only a base station in an NR system is taken as an example, but the specific type of the base station is not limited.

[0020] For ease of understanding, the following describes some contents related to the embodiments of the present application: First, cross-carrier scheduling.

[0021] The 5G NR system supports the deployment of one or more Component Carriers (CCs) or cells for a UE. In NR, a Primary Cell (PCell) and a Secondary Cell (SCell) may both be configured to be self-scheduled, and only an SCell can perform cross-carrier scheduling with a PCell or other SCells.

[0022] Second, carrier aggregation.

[0023] To meet the LTE-A downlink peak speed of 1 Gbps and uplink peak speed of 500 Mbps, a transmission bandwidth of up to 100 MHz needs to be provided. However, due to a lack of continuous spectrum with such a large bandwidth, LTE-A proposes the solution of carrier aggregation.

[0024] Carrier aggregation is the aggregation of two or more component carriers to support larger transmission bandwidth (up to 100 MHz). In practice, each component carrier corresponds to an independent cell. In general, one component carrier may be equivalent to one cell. The maximum bandwidth of each component carrier is 20 MHz. In order to efficiently utilize the fragmented spectrum, carrier aggregation supports aggregation between different component carriers, specifically: Component carriers of the same or different bandwidth; Component carriers in the same frequency band, adjacent or non-adjacent; This may include cases such as component carriers in different frequency bands.

[0025] 3. SL transmission.

[0026] SL transmission is used to transmit data directly between terminal user equipment (UE) without going through a network device.

[0027] The UE transmits sidelink control information (SCI) through a physical sidelink control channel (PSCCH) and transmits data by scheduling transmission of a physical sidelink shared channel (PSSCH). This transmission is performed in a broadcast format, and the receiving end does not feed back to the transmitting end whether the reception is successful or not.

[0028] The LTE sidelink design supports two resource allocation modes: scheduled resource allocation mode (commonly referred to as mode-1) and autonomous resource selection mode, in which the former is controlled by the network equipment to allocate resources for each UE, and the latter is where resources are selected autonomously by the UE.

[0029] LTE supports sidelink carrier aggregation (CA). Unlike the Uu interface (i.e., downlink and uplink), LTE sidelink CA does not distinguish between primary component carrier (PCC) and secondary component carrier (SCC). A UE in autonomous source selection mode performs resource sensing and reservation independently on each CC.

[0030] The design of the LTE sidelink is applied to certain public safety services (e.g., emergency communication at disaster sites such as fire sites or earthquakes) or vehicle-to-everything (V2X) communication. Vehicle-to-everything communication includes various services such as basic safety-type communication, advanced (autonomous) driving, formation, sensor expansion, etc. Since the LTE sidelink only supports broadcast communication, it is mainly used for basic safety-type communication, and other advanced V2X services are supported by the NR sidelink.

[0031] The 5G NR system may be used in operating frequency bands above 6 GHz not supported by LTE, supporting a larger operating bandwidth, and the NR system also supports Sidelink interface communication for direct communication between terminals.

[0032] Sidelink transmission is mainly divided into several transmission formats: broadcast, groupcast, and unicast. Unicast, as the name suggests, is one-to-one transmission. Groupcast is one-to-many transmission. Broadcast is also one-to-many transmission, but broadcast does not have the concept of UEs belonging to the same group.

[0033] On the sidelink, the PSCCH carries the SCI for scheduling the PSSCH. The SCI may indicate the transmission of resources and reserve these resources for future transmissions. The PSFCH is used to feed back sidelink hybrid automatic repeat request acknowledgement (HARQ-ACK) information. After the user determines the sidelink HARQ information, the user may further transmit the sidelink HARQ information to the base station via the PUCCH or PUSCH.

[0034] Hereinafter, the reference signal determining method according to the embodiment of the present application will be described in detail with reference to specific embodiments and application scenarios thereof in conjunction with the drawings.

[0035] Referring to FIG. 2, FIG. 2 is a flowchart of a reference signal determination method according to an embodiment of the present application, which is performed by a terminal, and as shown in FIG. 2, includes the following steps:

[0036] Step 201, when a first target schedules a resource of a second target to perform a sidelink (SL) transmission, executes a first operation; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal for a second target path loss measurement based on a preset reference signal identifier; determining the target reference signal based on target control signaling on the first object.

[0037] In the embodiment of the present application, the first object scheduling resources of the second object to perform sidelink SL transmission may be understood as the resources indicated, configured or scheduled by the target control signaling on the first object are resources on the second object, and the SL transmission may be understood as SL transmission and / or reception. It should be understood that if the second object is a cell, the second object may be called an SL cell, if the second object is a frequency point, the second object may be called an SL frequency point, and if the second object is a carrier, the second object may be called an SL carrier.

[0038] The target reference signal being used for the path loss measurement of a second target may be understood as a path loss result measured based on the target reference signal being used to represent the path loss measurement result of the second target. The first operation may be understood as an operation of determining a target reference signal for the path loss measurement of the second target. It should be understood that in the embodiment of the present application, performing a path loss measurement based on a target reference signal may be performed before the first operation or after the first operation. In other words, the first operation may be understood as determining a path loss corresponding to the SL transmission, i.e. determining a path loss corresponding to the SL transmission based on the determined target reference signal.

[0039] Alternatively, the preset reference signal identifier may be understood as an index or identifier of a reference signal, for example, the preset reference signal identifier may be represented as a PUSCH path loss reference signal identifier (PUSCH-PathlossReferenceRS-Id) or a sounding reference signal path loss reference signal identifier (SRS-PathlossReferenceRS-Id). It should be understood that in the embodiment of the present application, the preset reference signal identifier may be agreed upon by a protocol, for example, it may be agreed upon by the protocol that an identifier value corresponding to the preset agreed reference signal identifier may be a maximum or minimum or a specific identifier value.

[0040] Alternatively, the preset reference signal identifier may be an identifier associated with a preset sounding reference signal (SRS) resource set, for example, when the preset reference signal is SRS resource set 0, the identifier is associated with SRS resource set 0, and the target reference signal may be understood as an RS in SRS resource set 0, i.e., an RS corresponding to SRS-ResourceSetId=0. In the embodiment of the present application, when the first target schedules the resources of the second target to perform sidelink SL transmission, the target reference signal is determined based on the preset reference signal identifier or target control signaling on the first target, so that the path loss measurement result obtained by measuring based on the reference signal corresponding to the target reference signal is the path loss measurement result of the second target, and power control is further performed on the second target based on the downlink path loss. Therefore, the embodiment of the present application can improve the reliability of transmission.

[0041] Optionally, in some embodiments, the pre-configured reference signal identifier is: When the terminal is provided with at least one first reference signal on a second target, the preset reference signal identifier corresponds to one of the first reference signals; and if the terminal is not provided with the first reference signal on a second target, the pre-configured reference signal identifier corresponds to a second reference signal of one of the first targets.

[0042] When at least one first reference signal is provided on the second target, an identifier corresponding to the first reference signal may be adopted as a preset reference signal identifier, so that the path loss measurement is performed based on the first reference signal on the second target, thereby ensuring the accuracy of the obtained path loss. When the first reference signal is not provided on the second target, an identifier corresponding to the second reference signal on the first target may be adopted as a preset reference signal identifier, thus avoiding the inability to perform power control due to the inability to perform path loss measurement on the second target, and realizing power control on the second target by performing path loss measurement using the second reference signal, thereby improving the reliability of transmission on the second target.

[0043] Optionally, determining the target reference signal based on the target control signaling on the first target may be understood as explicitly or implicitly indicating the target reference signal by the target control signaling transmitted by the network device on the first target. After receiving the target control signaling, the terminal may determine the target reference signal based on the target control signaling.

[0044] Optionally, in some embodiments, the targeted control signaling comprises: Condition 1: the target control signaling is the control signaling most recently received before the SL transmission; Condition 2: The receiving time of the target control signaling is before the starting time of the SL transmission, and the interval between the receiving time of the target control signaling and the starting time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; Condition 3: The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; At least one of the following conditions is satisfied: condition 4; the target control signaling is control signaling for scrambling a pre-configured Radio Network Temporary Identifier (RNTI).

[0045] In the embodiment of the present application, the control signaling may be Downlink Control Information (DCI) 0-X or DCI 3-Y or Radio Resource Control (RRC) or Medium Access Control Element (MAC CE) or other higher layer signaling in format, that is, the target control signaling may be a first Downlink Control Information (DCI), a second DCI, a Radio Resource Control (RRC) or a Medium Access Control Element (MAC CE), where the first DCI is different from the type of the second DCI.

[0046] Here, the first DCI may be a DCI corresponding to DCI 0-X, and the second DCI may be a DCI corresponding to DCI 3-Y. Optionally, the values ​​of X and Y may be set according to practical needs, for example, in some embodiments, X is 1 or 2, and Y is 0 or 1.

[0047] It should be noted that in the above case of indicating a target reference signal by target control signaling, the target reference signal may be indicated by RRC signaling and then updated by the MAC CE.

[0048] For the above condition 2, the above time unit may be understood as a time unit such as a frame, a subframe, a slot, a second, a millisecond, etc. Taking a slot as an example, the scheduled SL transmission and the target control signaling are spaced apart by at least N slots.

[0049] For the above condition 3, taking the preset frame as an example, the target control signaling may be specifically understood as the control signaling received in the frame corresponding to system frame number (SFN) 0.

[0050] For the above condition 4, if the control signaling is DCI 0-X, the preset RNTI may be one of a Cell Radio Network Temporary Identifier (C-RNTI), a Configured Scheduling Radio Network Temporary Identifier (CS-RNTI), a Semi-Persistent Channel State Information RNTI (SP-CSI-RNTI), and a Modulation and coding scheme Cell Radio Network Temporary Identifier (Modulation and coding scheme C-RNTI (MCS-C-RNTI). If the control signaling is DCI 3-Y, the preset RNTI may be a SL-RNTI or a SL-CS-RNTI.

[0051] Alternatively, the other higher layer signaling may be a configured grant configuration signaling.

[0052] Optionally, in some embodiments, if the target control signaling is the first DCI, determining the target reference signal based on the target control signaling on the first target further comprises: If the first DCI carries a first indication field, determining the target reference signal according to indication information of the first indication field; and if the first DCI does not carry the first indication field, determining the target reference signal based on a pre-configured reference signal identifier.

[0053] The first DCI may be understood as a DCI whose format is DCI 0-X, and the first indication field carried in the first DCI may be understood as the first DCI including a first indication field and the first indication field including indication information. In the embodiment of the present application, the indication information of the first indication field may be understood as the value of the first indication field, and the indication information is used to determine the target reference signal, for example, the indication information carried in the first indication field may be an identifier of the target reference signal, and the terminal may determine the target reference signal based on the identifier. If the first indication field is not carried in the first DCI, the terminal may directly determine the target reference signal based on a reference signal identifier that is preset. Specifically, the determination of the target reference signal based on a reference signal identifier that is preset may refer to the description of the above embodiment, and will not be further described here.

[0054] In an embodiment of the present application, the first indication field may be a Sounding Reference Signal resource indication field (SRI).

[0055] Optionally, in some embodiments, if the target control signaling is the second DCI, determining the target reference signal based on the target control signaling on the first target further comprises: determining a physical downlink control channel (PDCCH) demodulation reference signal (DMRS) corresponding to the second DCI as the target reference signal; determining the target reference signal based on a second indication field carried in the second DCI.

[0056] The second DCI may be understood as a DCI that can carry the second indication field, and the second DCI is different from the first DCI. In the following embodiment, the second DCI is taken as an example of a DCI whose format is DCI 3-Y. In this case, the second DCI including the second indication field may be understood as adding a second indication field to the second DCI, and indicating a target reference signal according to the value of the second indication field. If the second DCI does not have a second indication field added, the PDCCH DMRS corresponding to the second DCI may be the target reference signal.

[0057] In an embodiment of the present application, the first indication field may be a sounding reference signal resource indication field.

[0058] Optionally, in some embodiments, there is no control signaling on the second subject.

[0059] In the embodiment of the present application, for a second object where control signaling exists, the control signaling on the second object can be adopted to determine a target reference signal, and for only a second object where control signaling does not exist, the first operation of the present application can be adopted to determine a target reference signal. For example, DCI format 0-0 may be DCI format 0-0 on a cell where the SL resource is located, or may be DCI format 0-0 on a scheduling cell (i.e., a cell where the SL DCI is located).

[0060] For example, the terminal may determine the power of a sidelink synchronization signal and PBCH block (S-SSB) transmission occasion on slot i based on the following scheme: JPEG0007644227000001.jpg6143 can be determined: JPEG0007644227000002.jpg7142, Where: JPEG0007644227000003.jpg7142 is the maximum transmit power supported by the user, JPEG0007644227000004.jpg7142 is the value of p0-DL-S-SSB (if provided), otherwise JPEG0007644227000005.jpg7142, JPEG0007644227000006.jpg6142 is the value of alpha-DL-S-SSB (if provided), otherwise JPEG0007644227000007.jpg6142, JPEG0007644227000008.jpg6142 is the path loss value corresponding to the transmission, JPEG0007644227000009.jpg7142 shows that one S-SSB transmission is subcarrier space (SCS) This is the number of Radio Bearers (RBs) included in JPEG0007644227000010.jpg7142.

[0061] Optionally, in some embodiments, JPEG0007644227000011.jpg8142, i.e. JPEG0007644227000012.jpg6142 is the device index JPEG0007644227000013.jpg6142, where JPEG is the downlink path loss calculated for the activated downlink bandwidth portion of carrier f of serving cell c using the reference signal.

[0062] Furthermore, the target reference signal is When the terminal is configured to monitor the PDCCH to detect the DCI format 0-0, the terminal is used to determine an RS resource of a PUSCH transmission power scheduled by the DCI format 0-0; and if the terminal is not configured to monitor the PDCCH to detect DCI format 0-0, the terminal is used to obtain RS resources corresponding to the SSBs of a Master Information Block (MIB).

[0063] Alternatively, in the embodiment of the present application, the above DCI format 0-0 may be DCI format 0-0 on the cell where the SL resource is located, or may be DCI format 0-0 on the scheduling cell (i.e., the cell where the SL DCI is located).

[0064] Of course, in some embodiments, the first operation may be adopted to determine the target reference signal regardless of whether a control signal exists on the second object. In other words, in some embodiments, the first operation may be adopted to determine the target reference signal for determining the path loss on all non-self-scheduled second objects.

[0065] Optionally, in some embodiments, when the first object is a cell, the first object is a primary cell or a secondary cell.

[0066] In the embodiment of the present application, in a scenario applied to cross-carrier scheduling, at this time, there are at least two cells, and a first cell indicates or configures or schedules SL resources of a second cell to transmit, where the first cell may be understood as a first target, and the second cell may be understood as a second target. Optionally, in some embodiments, the second cell is a SCell, and there is no control signaling on the second cell, and the first cell is a Pcell or a SCell.

[0067] It should be understood that, similarly, when the first object is a frequency point, the first object is a primary frequency point or a secondary frequency point, and when the first object is a carrier, the first object is a primary carrier or a secondary carrier, where the definitions of primary and secondary are defined according to corresponding functions, where the primary frequency point and primary carrier correspond to the primary cell, and the secondary frequency point and secondary carrier correspond to the secondary cell.

[0068] Optionally, in some embodiments, when at least two objects are located in the terminal, at least some of the at least two objects use the same target reference signal, and the at least two objects include the first object and a second object.

[0069] In the embodiment of the present application, in a scenario applied to SL carrier aggregation, the second target is an SL cell as an example. In this case, there are at least two SL cells, and the reference signal configuration for measuring downlink path loss in each SL cell may be the same or different. For example, the terminal adopts the same reference signal configuration in at least some SL cells, and this reference signal configuration is used to determine the target reference signal of the path loss measurement.

[0070] It should be understood that the SL Cells may be scheduled by other Cells (cross-carrier scheduling), or may be self-scheduled, or some of the SL Cells may be self-scheduled while another part is scheduled by other Cells.

[0071] In order to better understand the present application, the implementation of the present application will be described in detail below through several embodiments: Embodiment 1: In a cross-carrier scheduling scenario, when determining a target reference signal based on a pre-configured reference signal identifier, the following two methods are included:

[0072] Scheme 1: It is assumed that the second cell is a SL cell, the first cell schedules SL transmission on the second cell, and the UE configures four reference signal resource indexes and reference signal configuration sets corresponding to each index according to a parameter PUSCH-PathlossReferenceRS in the second cell, and each reference signal resource index set may include at least one of a synchronization signal block (SSB, Synchronization Signal and PBCH block) index set and a CSI-RS resource index set, which are respectively provided by parameters ssb-Index and csi-RS-Index. At this time, the UE selects a reference signal corresponding to an identifier of 0 (pusch-PathlossReferenceRS-Id=0) in PUSCH-PathlossReferenceRS to be used for downlink path loss measurement of SL transmission power control.

[0073] Method 2: If the second cell is a SL cell, the first cell schedules SL transmission on the second cell, and the UE does not configure a reference signal in the second cell, the UE selects to use a reference signal corresponding to pusch-PathlossReferenceRS-Id=0 in the reference signal of the first cell for downlink path loss measurement for SL transmission power control.

[0074] Example 2: In a cross-carrier scheduling scenario, when determining a target reference signal based on control signaling of a first target, assuming that the second cell is an SL cell, the first cell schedules SL transmission on the second cell, and the UE is provided with an SRS resource index-PUSCH power control (SRI-PUSCH-PowerControl) and one or more PUSCH-PathlossReferenceRS-Id values, the UE obtains a mapping from the SRS resource index-PUSCH power control identifier (sri-PUSCH-PowerControlId) in the SRI-PUSCH-PowerControl to the PUSCH-PathlossReferenceRS-Id value from the SRS resource index-PUSCH power control identifier (sri-PUSCH-PowerControlId) in the SRI-PUSCH-PowerControl, and determines a reference signal for downlink pathloss measurement of the SL transmission power control based on the value of the PUSCH-PathlossReferenceRS-Id.

[0075] Example 3: In a carrier aggregation scenario, when determining a target reference signal based on the control signaling of a first target, the following two methods are included: Scheme 3: It is assumed that the first cell schedules SL transmission on the first SL cell, and the second SL cell and the first SL cell adopt the same reference signal configuration for downlink path loss measurement of SL transmission power control. If the PUSCH transmission of the first cell is configured with a grant configuration (ConfiguredGrantConfig) and the ConfiguredGrantConfig includes an RRC configured uplink grant (rrc-ConfiguredUplinkGrant), a value of a reference signal index, such as a path loss reference index (pathlossReferenceIndex), is provided by the rrc-ConfiguredUplinkGrant, and the UE performs downlink path loss measurement of SL transmission power control according to the corresponding reference signal.

[0076] Method 4: It is assumed that the first cell schedules SL transmission on the first SL cell, and the second SL cell and the first SL cell adopt the same reference signal configuration for downlink path loss measurement of SL transmission power control. If the PUSCH transmission of the first cell is configured by ConfiguredGrantConfig and ConfiguredGrantConfig does not include rrc-ConfiguredUplinkGrant, the UE determines the reference signal index value PUSCH-PathlossReferenceRS-Id according to the value of the SRI indication field in the DCI that activates the PUSCH transmission. If the DCI that activates the PUSCH transmission does not include the SRI indication field, the UE selects a reference signal corresponding to PUSCH-PathlossReferenceRS-Id=0.

[0077] Referring to FIG. 3, FIG. 3 is a flowchart of a reference signal processing method according to an embodiment of the present application, which is performed by a network device, and includes the following steps, as shown in FIG.

[0078] Step 301: when a first target schedules resources of a second target to perform sidelink (SL) transmission, sending target control signaling to a terminal on the first target, the target control signaling being used to determine a target reference signal for path loss measurement of the second target.

[0079] Optionally, the targeted control signaling comprises: The target control signaling is the most recently received control signaling before the SL transmission; and A reception time of the target control signaling is before a start time of the SL transmission, and an interval between the reception time of the target control signaling and the start time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; the target control signaling is control signaling scrambled by a preset wireless network temporary identifier.

[0080] Optionally, the target control signaling is a first downlink control information DCI, a second DCI, a radio resource control RRC or a media access control unit MAC CE, where the first DCI is of a different type from the second DCI.

[0081] Optionally, if the target control signaling is the first DCI, determining the target reference signal based on the target control signaling on the first target further comprises: If the first DCI carries a first indication field, determining the target reference signal according to indication information of the first indication field; and if the first DCI does not carry the first indication field, determining the target reference signal based on a pre-configured reference signal identifier.

[0082] Optionally, the first indication field is a sounding reference signal resource indication field.

[0083] Optionally, when the target control signaling is the second DCI, determining the target reference signal based on the target control signaling on the first target further comprises: determining a physical downlink control channel demodulation reference signal corresponding to the second DCI as the target reference signal; determining the target reference signal based on a second indication field carried in the second DCI.

[0084] Optionally, the second indication field is a sounding reference signal resource indication field.

[0085] Optionally, the preset reference signal identifier is: When the terminal is provided with at least one first reference signal on a second target, the preset reference signal identifier corresponds to one of the first reference signals; and if the terminal is not provided with the first reference signal on a second target, the pre-configured reference signal identifier corresponds to a second reference signal of one of the first targets.

[0086] Optionally, there is no control signaling on said second subject.

[0087] Optionally, when the first object is a cell, the first object is a primary cell or a secondary cell.

[0088] Optionally, when at least two objects are located in the terminal, at least some of the at least two objects use the same target reference signal, and the at least two objects include the first object and a second object.

[0089] It should be noted that this embodiment is an embodiment of a network device corresponding to the embodiment shown in FIG. 2, and its specific embodiment may refer to the relevant description of the embodiment shown in FIG. 2 and achieve the same beneficial effects, and will not be further described here in order to avoid repetition of description.

[0090] It should be noted that for the reference signal determination method according to the embodiment of the present application, the execution body may be a reference signal determination device or a control module for executing the reference signal determination method in the reference signal determination device. In the embodiment of the present application, the execution of the reference signal determination method by the reference signal determination device is taken as an example to describe the reference signal determination device according to the embodiment of the present application.

[0091] Referring to FIG. 4, FIG. 4 is a structural diagram of a reference signal determining device according to an embodiment of the present application. As shown in FIG. 4, the reference signal determining device 400 includes: an execution module 401 for executing a first operation when a first target schedules resources of a second target for sidelink (SL) transmission; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal for a second target path loss measurement based on a preset reference signal identifier; determining the target reference signal based on target control signaling on the first object.

[0092] Optionally, the preset reference signal identifier is: When the terminal is provided with at least one first reference signal on a second target, the preset reference signal identifier corresponds to one of the first reference signals; and if the terminal is not provided with the first reference signal on a second target, the pre-configured reference signal identifier corresponds to a second reference signal of one of the first targets.

[0093] Optionally, the targeted control signaling comprises: The target control signaling is the most recently received control signaling before the SL transmission; and A reception time of the target control signaling is before a start time of the SL transmission, and an interval between the reception time of the target control signaling and the start time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; the target control signaling is control signaling scrambled by a preset wireless network temporary identifier.

[0094] Optionally, the target control signaling is a first downlink control information DCI, a second DCI, a radio resource control RRC or a media access control unit MAC CE, where the first DCI is of a different type from the second DCI.

[0095] Optionally, if the target control signaling is the first DCI, determining the target reference signal based on the target control signaling on the first target further comprises: If the first DCI carries a first indication field, determining the target reference signal according to indication information of the first indication field; and if the first DCI does not carry the first indication field, determining the target reference signal based on a pre-configured reference signal identifier.

[0096] Optionally, the first indication field is a sounding reference signal resource indication field.

[0097] Optionally, when the target control signaling is the second DCI, determining the target reference signal based on the target control signaling on the first target further comprises: determining a physical downlink control channel demodulation reference signal corresponding to the second DCI as the target reference signal; determining the target reference signal based on a second indication field carried in the second DCI.

[0098] Optionally, the second indication field is a sounding reference signal resource indication field.

[0099] Optionally, there is no control signaling on said second subject.

[0100] Optionally, when the first object is a cell, the first object is a primary cell or a secondary cell.

[0101] Optionally, when at least two objects are located in the terminal, at least some of the at least two objects use the same target reference signal, and the at least two objects include the first object and a second object.

[0102] The reference signal determining apparatus according to the embodiment of the present application can implement each process implemented by the terminal in the embodiment of the method of FIG. 2, and will not be further described here to avoid repetition.

[0103] It should be noted that for the reference signal determination method according to the embodiment of the present application, the execution body may be a reference signal determination device or a control module for executing the reference signal determination method in the reference signal determination device. In the embodiment of the present application, the execution of the reference signal determination method by the reference signal determination device is taken as an example to describe the reference signal determination device according to the embodiment of the present application.

[0104] It should be noted that the execution body of the reference signal processing method according to the embodiment of the present application can be a reference signal determination device or a control module for executing the reference signal processing method in the reference signal determination device. In the embodiment of the present application, the execution of the reference signal processing method by the reference signal determination device is taken as an example to describe the reference signal determination device according to the embodiment of the present application.

[0105] Referring to FIG. 5, FIG. 5 is a structural diagram of a reference signal processing device according to an embodiment of the present application. As shown in FIG. 5, a reference signal processing device 500 includes: The present invention further includes a transmitting module 501 for transmitting target control signaling to a terminal on the first target when the first target schedules resources of the second target to perform sidelink (SL) transmission, the target control signaling being used to determine a target reference signal for path loss measurement of the second target.

[0106] Optionally, the targeted control signaling comprises: The target control signaling is the most recently received control signaling before the SL transmission; and A reception time of the target control signaling is before a start time of the SL transmission, and an interval between the reception time of the target control signaling and the start time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; the target control signaling is control signaling scrambled by a preset wireless network temporary identifier.

[0107] Optionally, the target control signaling is a first downlink control information DCI, a second DCI, a radio resource control RRC or a media access control unit MAC CE, where the first DCI is of a different type from the second DCI.

[0108] Optionally, if the target control signaling is the first DCI, determining the target reference signal based on the target control signaling on the first target further comprises: If the first DCI carries a first indication field, determining the target reference signal according to indication information of the first indication field; and if the first DCI does not carry the first indication field, determining the target reference signal based on a pre-configured reference signal identifier.

[0109] Optionally, the first indication field is a sounding reference signal resource indication field.

[0110] Optionally, when the target control signaling is the second DCI, determining the target reference signal based on the target control signaling on the first target further comprises: determining a physical downlink control channel demodulation reference signal corresponding to the second DCI as the target reference signal; determining the target reference signal based on a second indication field carried in the second DCI.

[0111] Optionally, the second indication field is a sounding reference signal resource indication field.

[0112] Optionally, the preset reference signal identifier is: When the terminal is provided with at least one first reference signal on a second target, the preset reference signal identifier corresponds to one of the first reference signals; and if the terminal is not provided with the first reference signal on a second target, the pre-configured reference signal identifier corresponds to a second reference signal of one of the first targets.

[0113] Optionally, there is no control signaling on said second subject.

[0114] Optionally, when the first object is a cell, the first object is a primary cell or a secondary cell.

[0115] Optionally, when at least two objects are located in the terminal, at least some of the at least two objects use the same target reference signal, and the at least two objects include the first object and a second object.

[0116] The reference signal processing device according to the embodiment of the present application can realize each process implemented by the network equipment in the embodiment of the method of FIG. 3, and will not be further described here to avoid repetition.

[0117] The reference signal determination device and the reference signal processing device in the embodiment of the present application may be devices, and may be components, integrated circuits, or chips in a terminal. The devices may be mobile terminals or non-mobile terminals. Exemplarily, the mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and the non-mobile terminals may be servers, network attached storage (NAS), personal computers (PC), televisions (TV), deposit payment machines or self-service machines, and the embodiments of the present application are not specifically limited.

[0118] The reference signal determining device and the reference signal processing device in the embodiment of the present application may be a device having an operating system, which may be an Android operating system, an ios operating system, or other possible operating systems, and the embodiment of the present application is not specifically limited.

[0119] The reference signal determination device and the reference signal processing device according to the embodiments of the present application can realize each process realized by the embodiments of the method of Figures 2 to 3 and achieve the same technical effects, and will not be described further here in order to avoid repetition of description.

[0120] Optionally, as shown in Fig. 6, the embodiment of the present application further provides a communication device 600, including a processor 601, a memory 602, and a program or instruction stored in the memory 602 and operable on the processor 601, for example, when the communication device 600 is a terminal, the program or instruction can be executed by the processor 601 to realize each process of the embodiment of the reference signal determination method, and achieve the same technical effect. When the communication device 600 is a network device, the program or instruction can be executed by the processor 601 to realize each process of the embodiment of the reference signal processing method, and achieve the same technical effect. In order to avoid repetition, no further description will be given here.

[0121] FIG. 7 is a schematic diagram of the hardware structure of a terminal for implementing the embodiments of the present application.

[0122] The terminal 700 includes components such as, but not limited to, a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and a processor 710.

[0123] As can be understood by those skilled in the art, the terminal 700 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 710 by a power management system, so that the power management system can realize functions such as charge / discharge management and power consumption management. The terminal structure shown in Figure 7 does not constitute a limitation on the terminal, and the terminal may include more or less components than the number of components shown, or a combination of some components, or a different arrangement of components, and will not be further described here.

[0124] It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processor (Graphics Processing Unit, GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes image data of still or video images obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be arranged in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. The other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, and a control lever, which will not be described further herein.

[0125] In the embodiment of the present application, the radio frequency unit 701 receives downlink data from the network device, and then processes the data in the processor 710, and transmits uplink data to the network device. In general, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0126] The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a program or instruction storage area and a data storage area, where the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (e.g., a sound playback function, an image playback function, etc.), etc. The memory 709 may include a high-speed random access memory or a non-volatile memory, where the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. For example, the memory 709 may be at least one magnetic disk memory device, a flash memory device, or other non-volatile solid-state memory device.

[0127] The processor 710 may include one or more processing units. Optionally, the processor 710 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, and application programs or instructions, and the modem processor mainly processes wireless communication, such as a baseband processor. As can be understood, the modem processor does not have to be integrated into the processor 710.

[0128] Wherein the processor 710 is adapted to perform a first operation when a first target schedules resources of a second target for sidelink (SL) transmission; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal for a second target path loss measurement based on a preset reference signal identifier; determining the target reference signal based on target control signaling on the first object.

[0129] It should be understood that in this embodiment, the above processor 710 and the radio frequency unit 701 can realize each process implemented by the terminal in the embodiment of the method of FIG. 2, and will not be further described here to avoid repetition.

[0130] Specifically, an embodiment of the present application further provides a network device. As shown in Fig. 8, the network device 800 includes an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 and the radio frequency device 802 are connected. In the uplink direction, the radio frequency device 802 receives information through the antenna 801, and transmits the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be transmitted and transmits it to the radio frequency device 802, and the radio frequency device 802 processes the received information and then sends it out through the antenna 801.

[0131] The above frequency band processing device may be located in a baseband device 803, and the method performed by the network equipment in the above embodiments may be implemented in the baseband device 803, which includes a processor 804 and a memory 805.

[0132] The baseband device 803 may include, for example, at least one baseband board, on which multiple chips are installed, and as shown in FIG. 8, one of the chips is, for example, a processor 804, which is connected to a memory 805, and calls the program in the memory 805 to perform the network equipment operations shown in the above method embodiments.

[0133] The baseband device 803 may further include a network interface 806, which is used to exchange information with the radio frequency device 802, and which is, for example, a common public radio interface (abbreviated as CPRI).

[0134] Specifically, the network device of the embodiment of the present application further includes instructions or programs stored in memory 805 and capable of running on processor 804, and processor 804 can call the instructions or programs in memory 805 to execute the method performed by each module shown in FIG. 5 and achieve the same technical effect, which will not be described further here in order to avoid repetition of description.

[0135] The embodiments of the present application further provide a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, each process of the above-mentioned reference signal determination method or reference signal processing method embodiment can be realized, and the same technical effect can be achieved. In order to avoid repetition, no further description will be given here.

[0136] Here, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0137] The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is used to run a network device program or instruction to realize each process of the embodiment of the above reference signal processing method, and can achieve the same technical effect. In order to avoid repetition, no further description will be given here.

[0138] It should be understood that the chips referred to in the embodiments of the present application may be referred to as system level chips, system chips, chip systems, or systems on chips.

[0139] It should be explained that in this specification, the terms "comprise", "include", or any other variants thereof are intended to cover the non-exclusive "comprise", whereby a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also other elements not expressly listed or inherent to such process, method, article, or apparatus. In the absence of further limitations, an element limited by the phrase "comprises a" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes this element. It should be pointed out that the scope of the method and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions in an essentially simultaneous manner or in reverse order based on the functions involved, for example, the described method can be performed in a different order than described, and various steps can be added, omitted, or combined. Also, features described with reference to some examples can be combined in other examples.

[0140] From the above description of the embodiments, it is clear to those skilled in the art that the methods of the above embodiments can be realized in the form of software and a necessary general-purpose hardware platform. Of course, they can also be realized in hardware, but in many cases the former is a more preferred embodiment. Based on this understanding, the technical solution of the present application may be substantially or in part embodied in the form of a software product. The computer software product is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes some instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a base station, etc.) to execute the methods described in each embodiment of the present application.

[0141] The above describes the embodiments of the present application in conjunction with the drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not limiting. Those skilled in the art can take the suggestions of this application and make many forms without departing from the spirit and scope of protection of the claims, all of which belong to the protection scope of this application.

Claims

1. A reference signal determination method performed by a terminal, comprising: When resources of a second target on a first target for performing a sidelink (SL) transmission are scheduled or allocated by a network device, the terminal performs a first operation; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal based on target control signaling on the first object; the target control signaling is a first downlink control information (DCI); A reference signal determination method, wherein when the terminal is configured to monitor a PDCCH to detect DCI format 0-0 on the first target, the target reference signal includes a reference signal for determining a transmission power of a PUSH scheduled by the target control signaling.

2. The method of claim 1 , wherein the second target is a SL cell, and the second target is self-scheduled.

3. The targeted control signaling comprises: The target control signaling is a most recently received control signaling before the SL transmission; and A receiving time of the target control signaling is before a starting time of the SL transmission, and an interval between the receiving time of the target control signaling and the starting time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; The method of claim 1 , wherein the target control signaling is control signaling scrambled by a pre-configured wireless network temporary identifier.

4. determining the target reference signal based on target control signaling on the first object includes: If the first DCI carries a first indication field, determining the target reference signal based on indication information of the first indication field; if the first DCI does not carry the first indication field, determining the target reference signal based on a pre-configured reference signal identifier; The method of claim 1 , wherein the first indication field is a sounding reference signal resource indication field.

5. The method of claim 1 , wherein when the first object is a cell, the first object is a primary cell or a secondary cell.

6. 2. The method according to claim 1, wherein, when at least two objects are located in the terminal, at least a part of the at least two objects uses the same target reference signal, and the at least two objects include the first object and a second object.

7. A reference signal processing method performed by a network device, comprising: When the network device schedules or configures resources of a second target on the first target for sidelink (SL) transmission, the network device transmits target control signaling to a terminal on the first target, the target control signaling being used to determine a target reference signal; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier; the target control signaling is a first downlink control information (DCI); A reference signal processing method, wherein when the terminal is configured to monitor a PDCCH to detect DCI format 0-0 on the first target, the target reference signal includes a reference signal for determining a transmission power of a PUSH scheduled by the target control signaling.

8. The targeted control signaling comprises: The target control signaling is a most recently received control signaling before the SL transmission; and A receiving time of the target control signaling is before a starting time of the SL transmission, and an interval between the receiving time of the target control signaling and the starting time of the SL transmission is greater than N time units, where N is a positive integer greater than 1; The target control signaling is a control signaling received in a preset frame, a preset subframe, a preset slot, or a preset measurement window; The method of claim 7 , wherein the target control signaling is control signaling scrambled by a preset radio network temporary identifier.

9. A reference signal determination device applied to a terminal, comprising: an execution module for performing a first operation when resources of a second object on a first object for performing a sidelink (SL) transmission are scheduled or allocated by a network device; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier, and the first operation is: determining a target reference signal based on target control signaling on the first object; the target control signaling is a first downlink control information (DCI); When the terminal is configured to monitor a PDCCH to detect DCI format 0-0 on the first target, the target reference signal includes a reference signal for determining a transmission power of a PUSH scheduled by the target control signaling.

10. A reference signal processing device applied to a network device, comprising: a transmitting module for transmitting target control signaling to a terminal on a first target when the network device schedules or configures resources of a second target on a first target for sidelink (SL) transmission, the target control signaling being used to determine a target reference signal; Wherein, the first object and the second object are one of a cell, a frequency point, and a carrier; the target control signaling is a first downlink control information (DCI); When the terminal is configured to monitor a PDCCH to detect DCI format 0-0 on the first target, the target reference signal includes a reference signal for determining a transmission power of a PUSH scheduled by the target control signaling.

11. A readable storage medium having a program or instructions stored thereon, which, when executed by a processor, realizes the steps of the reference signal determination method described in any one of claims 1 to 6, or which, when executed by a processor, realizes the steps of the reference signal processing method described in any one of claims 7 and 8.

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