Information transmission method and terminal

Abstract

This disclosure provides an information transmission method and a terminal, and relates to the field of communications technologies. The method includes: transmitting sidelink control information SCI and target control information according to a resource mapping pattern; where the resource mapping pattern is used to indicate transmission resources for a physical sidelink shared channel PSSCH scheduled by the SCI and for the target control information, and the target control information is next-stage SCI or sidelink feedback control information SFCI. The solution of this disclosure is intended to implement transmission of second-stage SCI or SFCI of two-stage SCI. (FIG. 2)

Description

Information transmission methods and terminals

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 201910736219.0, filed in China on August 9, 2019, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of communication technology, and in particular to an information transmission method and terminal. Background Technology

[0004] As shown in Figure 1, the Long Term Evolution (LTE) system currently supports sidelinks, which are used for direct data transmission between user equipment (UE) devices without going through network equipment.

[0005] Sidelink transmission mainly includes several transmission forms: broadcast, groupcast, and unicast. Unicast, as the name suggests, is one-to-one transmission. Multicast is one-to-many transmission. Broadcast is also one-to-many transmission, but it doesn't involve the concept of UEs belonging to the same group. The UE sends sidelink control information (SCI) through the Physical Sidelink Control Channel (PSCCH) and schedules transmission on the Physical Sidelink Shared Channel (PSSCH) to send data.

[0006] LTE sidelinks are designed for specific public safety applications (such as emergency communications in disaster areas like fires or earthquakes) or vehicle-to-everything (V2X) communications. V2X communications encompass various services, including basic safety communications, advanced (autonomous) driving, platooning, and sensor extensions. Because LTE sidelinks only support broadcast communications, they are primarily used for basic safety communications. Advanced V2X services with stringent QoS requirements regarding latency and reliability will be supported through NR sidelinks.

[0007] However, in current NR sidelinks, unicast and multicast support Hybrid Automatic Repeat Request (HARQ) feedback mechanisms and Channel State Information (CSI) measurement, but broadcast does not support HARQ feedback. This results in the SCI (Segmentation Channel Index) for scheduling unicast or multicast transmissions being much larger than that for scheduling broadcast transmissions. Padding the broadcast SCI with 0s or 1s to reach the size of the unicast / multicast SCI would degrade its performance. Without padding, the complexity of detecting SCIs of different sizes at the receiver would be significantly higher.

[0008] In addition, in unicast and multicast, the terminal can report the measured CSI report to the sending UE. CSI report information is part of the Sidelink Feedback Control Information (SFCI), and currently there is no specific design for how SFCI works in the channel.

[0009] Summary of the Invention

[0010] This disclosure provides an information transmission method and terminal to realize the transmission of the second-level SCI or SFCI in a two-level SCI system.

[0011] To solve the above-mentioned technical problems, this disclosure is implemented as follows:

[0012] In a first aspect, embodiments of this disclosure provide an information transmission method, including:

[0013] According to the resource mapping pattern, the side link control information (SCI) and target control information are transmitted; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical side link shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or the side link feedback control information (SFCI).

[0014] Secondly, embodiments of this disclosure also provide a terminal, including:

[0015] The transmission module is used to transmit sidelink control information (SCI) and target control information according to a resource mapping pattern; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical sidelink shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or sidelink feedback control information (SFCI).

[0016] Thirdly, embodiments of this disclosure also provide a terminal, including a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the information transmission method described above.

[0017] Fourthly, embodiments of this disclosure also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the information transmission method described above.

[0018] Thus, in this embodiment of the disclosure, SCI and target control information (next-level SCI or SFCI) are transmitted according to the resource mapping pattern (used to indicate the transmission resources of PSSCH and target control information for SCI scheduling), which ensures the performance of SCI or SFCI while improving the demodulation performance of PSSCH and the capacity of the system. Attached Figure Description

[0019] Figure 1 is a schematic diagram of data transmission supported by the terminal;

[0020] Figure 2 is a flowchart illustrating the information transmission method according to an embodiment of this disclosure;

[0021] Figure 3 is a schematic diagram illustrating one application of the method according to an embodiment of this disclosure;

[0022] Figure 4 is a second schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0023] Figure 5 is a third schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0024] Figure 6 is a fourth schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0025] Figure 7 is a fifth schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0026] Figure 8 is a schematic diagram of the application of the method according to an embodiment of this disclosure;

[0027] Figure 9 is a seventh schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0028] Figure 10 is an eighth schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0029] Figure 11 is a ninth schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0030] Figure 12 is a schematic diagram of the application of the method of this disclosure embodiment;

[0031] Figure 13 is an eleventh schematic diagram illustrating the application of the method according to an embodiment of this disclosure;

[0032] Figure 14 is a schematic diagram of the application of the method according to an embodiment of the present disclosure, number 12.

[0033] Figure 15 is a schematic diagram of the structure of the terminal according to an embodiment of this disclosure;

[0034] Figure 16 is a schematic diagram of the structure of a terminal according to another embodiment of this disclosure. Detailed Implementation

[0035] To make the technical problems, technical solutions and advantages to be solved by this disclosure clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0036] As shown in Figure 2, an information transmission method according to an embodiment of this disclosure includes:

[0037] Step 201: Transmit the side link control information (SCI) and target control information according to the resource mapping pattern; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical side link shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or the side link feedback control information (SFCI).

[0038] Through the above steps, the terminal applying the method of this disclosure embodiment will transmit SCI and target control information (next-level SCI or SFCI) according to the resource mapping pattern, wherein the resource mapping pattern is used to indicate the transmission resources of PSSCH scheduled by SCI and target control information, thereby realizing two-level SCI or SFCI transmission.

[0039] The terminal that applies the method of this disclosure embodiment can be a sending end or a receiving end.

[0040] It should be understood that in this embodiment, SCI scheduling of PSSCH can be performed by a single-level SCI or by two-level SCI, i.e., joint scheduling by the SCI and the next-level SCI. Optionally, in the resource mapping pattern, the target control information is mapped starting from a first position in the time domain and starting from a second position in the frequency domain; wherein the first position and / or the second position is determined based on at least one of the following information:

[0041] The position of the demodulation reference signal DMRS of PSSCH;

[0042] Transmit configuration parameters;

[0043] The number of layers in PSSCH;

[0044] The configuration of the DMRS used;

[0045] SFCI configuration information;

[0046] The type of service being transmitted;

[0047] Resources allocated by PSSCH;

[0048] SCI resource allocation.

[0049] The position of the DMRS in the PSSCH is as follows:

[0050] The position of the Nth DMRS or the Nth DMRS set in PSSCH, where N is an integer greater than or equal to 1; or

[0051] The position of the front-end DMRS in PSSCH.

[0052] The transmission configuration parameters include at least one of the following: number of layers, load, and bit rate.

[0053] For mapping to the next level SCI, the transmission configuration parameter corresponds to at least one of the following: the number of layers, the load, and the bitrate of the next level SCI; for mapping to SFCI, the transmission configuration parameter corresponds to at least one of the following: the number of layers, the load, and the bitrate of the SFCI.

[0054] The configuration of the DMRS used includes at least one of the following: DMRS type, number of symbols, and multiplexing method.

[0055] Here, the DMRS used refers to the DMRS used for demodulating the target control information (next-level SCI or SFCI). Its multiplexing methods include, but are not limited to, Code Division Multiplexing (CDM) and Frequency Division Multiplexing (FDM). The DMRS type can be type 1 or type 2, and the number of symbols can be 1 or 2.

[0056] The configuration information of the SFCI includes: whether to carry an SFCI;

[0057] If an SFCI is carried, the SFCI configuration information also includes: the SFCI's transmission resources and / or the size of the information carried by the SFCI.

[0058] Whether or not an SFCI is carried can be explicitly indicated by specific information or implicitly. There are several specific implicit methods. For example, N bits can be used to indicate the transmission resources or information size of the SFCI. If all bits are 0 (indicated by one code point), it means that no SFCI is carried; if not all bits are 0, it means that an SFCI is carried, and the indication information corresponds to the transmission resources of the SFCI.

[0059] The types of services transmitted include multicast, unicast, or broadcast.

[0060] The resources allocated by the PSSCH include: frequency domain resources allocated by the PSSCH and / or time domain resources allocated by the PSSCH.

[0061] Here, the frequency domain resources allocated by PSSCH can be bandwidth, physical resource blocks (PRBs), or subchannels. The time domain resources allocated by PSSCH can be symbols, time slots, subframes, or frames.

[0062] Optionally, the location of the DMRS in the PSSCH is SCI indication, terminal radio resource control (RRC) configuration, protocol predefined, network downlink control information (DCI) configuration, network RRC configuration, or network preconfiguration;

[0063] The transmission configuration parameters are SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration;

[0064] The number of layers in the PSSCH is determined by SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration.

[0065] The DMRS configuration used is SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration;

[0066] The configuration information of the SFCI is SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration;

[0067] The service type transmitted is SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration;

[0068] The resources allocated by the PSSCH are SCI indication, terminal RRC configuration, protocol predefined, network DCI configuration, network RRC configuration, or network preconfiguration.

[0069] Thus, the information used to determine the first location and / or the second location, in addition to SCI resource configuration, can be SCI indication, terminal radio resource control (RRC) configuration, protocol predefined, network downlink control information (DCI) configuration, network RRC configuration, or network preconfiguration.

[0070] In addition, the transmission of target control information (next-level SCI or SFCI) is not limited to a single layer. Therefore, optionally, in the resource mapping pattern, the target control information on the target layer is mapped from a first position in the time domain and from a second position in the frequency domain, wherein the target layer is a single layer or multiple layers.

[0071] Here, in this resource mapping pattern, the next-level SCI or SFCI is mapped onto the target layer to complete the corresponding single-layer or multi-layer transmission.

[0072] The target layer is either predefined or indicated by the SCI.

[0073] Of course, the target layer can also be indicated by DCI, pre-configured, or network-configured. Specifically, SCI indicates the target layer by specifying the layer number and / or layer index of the next-level SCI or SFCI mapping in the SCI.

[0074] Furthermore, optionally, the number of the target layer is related to the number of layers of the PSSCH or the physical sidelink control channel PSCCH by predefinition or the SCI indication.

[0075] For example, SCI indicates that the number of target layers is the same as the number of layers in PSSCH, or the number of target layers is predefined as one.

[0076] Of course, in the resource mapping pattern, the mapping of target control information can be done in a frequency domain priority or a time domain priority manner.

[0077] Optionally, in the resource mapping pattern,

[0078] The target control information is mapped in the time domain starting from the symbol containing the Nth DMRS or the Nth DMRS set or the preceding DMRS, or the Lth symbol after the symbol containing the preceding DMRS, and in the frequency domain starting from the Mth PRB in the physical resource blocks (PRBs) allocated by the PSSCH; where M is an integer greater than or equal to 1, and L is an integer greater than or equal to 1.

[0079] Thus, the first position is the symbol containing the Nth DMRS of the PSSCH or the Lth symbol following it; or, the symbol containing the Nth DMRS set or the Lth symbol following it; or, the symbol containing the preceding DMRS or the Lth symbol following it. The second position is the Mth PRB in the PSSCH-allocated PRBs. Thus, in the time domain of the target layer, target control information is mapped starting from the symbol containing the Nth DMRS, the Nth DMRS set, or the preceding DMRS; or, starting from the Lth symbol following the symbol containing the Nth DMRS, the Nth DMRS set, or the preceding DMRS. In the frequency domain of the target layer, mapping begins from the Mth PRB in the PSSCH-allocated PRBs.

[0080] The value of M can be either the highest or lowest PRB among the PRBs allocated by PSSCH; the value of M can also be the edge PRB of a target frequency domain region (the highest or lowest PRB in the region), and the target frequency domain region is determined based on the size of the frequency domain resources to be occupied by the next-level SCI or SFCI. For example, if the next-level SCI or SFCI needs to occupy 50 PRBs in the frequency domain, the target frequency domain region is the middle 50 PRBs of the 100 PRBs allocated by PSSCH (the center of the PSSCH allocated bandwidth).

[0081] Optionally, in the resource mapping pattern, the target control information is mapped in the time domain starting from the Pth symbol after the SCI, and in the frequency domain starting from the Qth PRB of the SCI; where Q is an integer greater than or equal to 1, and P is an integer greater than or equal to 1.

[0082] Here, the first position is the P-th symbol after the SCI, and the second position is the Q-th PRB of the SCI. In the time domain of the target layer, the next-level SCI or SFCI is mapped starting from the P-th symbol after the SCI. In the frequency domain of the target layer, mapping starts from the Q-th PRB of the SCI.

[0083] Optionally, in the resource mapping pattern, the target control information is mapped in the time domain starting from the first available symbol allocated by PSSCH or the first available symbol that does not carry DMRS.

[0084] Here, the first position is the first available symbol allocated by PSSCH or the first available symbol without DMRS. In the time domain of the target layer, the target control information is mapped starting from the first available symbol allocated by PSSCH or the first available symbol without DMRS. The second position can then be the Mth PRB among the PRBs allocated by PSSCH. The value of M is as described above and will not be repeated here.

[0085] Furthermore, during the mapping process of the next level SCI in the two-level SCI, since there may be transmission of SFCI, optionally, in the resource mapping pattern, when carrying SFCI, the mapping of the next level SCI will perform rate matching or punching on the position of SFCI.

[0086] For example, if SFCI is configured and network configuration reserves resources for SFCI, then the next-level SCI mapping will perform rate matching on the reserved SFCI resources. Alternatively, puncturing can be applied to the SFCI location during the next-level SCI mapping.

[0087] It should also be noted that in unicast and multicast, it may be necessary for the terminal to perform measurement reporting. Therefore, optionally, when the service type of the transmission is multicast or unicast, the mapping of the next-level SCI in the resource mapping pattern will perform rate matching or punching on the position of the SFCI.

[0088] For broadcast transmissions, the next level SCI or SFCI may not need to be mapped.

[0089] It should also be understood that, in this embodiment, optionally, the target control information corresponds to the configuration of one or more DMRS;

[0090] When the target control information corresponds to the configuration of multiple DMRS, the configuration of the DMRS used is determined by predefinition or by the SCI.

[0091] The configuration of the DMRS for demodulating target control information can be flexibly set, and can be one or multiple. To make demodulation more explicit, when multiple DMRS configurations are available, the configuration of the DMRS used can be determined through predefined settings, SCI indication, network RRC indication, network DCI indication, or terminal RRC indication, thereby demodulating the target control information according to the determined DMRS configuration.

[0092] The configuration of the DMRS used in the target control information is the same as that of the DMRS in PSSCH, either through predefinition or indicated by the SCI.

[0093] Thus, the configuration of DMRS indicated by predefined or SCI can be specific configuration information of DMRS, or it can directly indicate the configuration of DMRS using PSSCH.

[0094] Specifically, the DMRS configuration used by the target control information is the same as that of the PSSCH DMRS configuration, meaning that the target control information shares the PSSCH DMRS configuration. For example, the target control information reuses the first DMRS or front-loaded DMRS or the first set of DMRS of the PSSCH; or, the target control information reuses its DMRS that overlap with the PSSCH; or, the temporal density of the DMRS used by the target control information is the same as that of the PSSCH DMRS.

[0095] Optionally, the SCI or the next-level SCI indicates the configuration of the DMRS of the PSSCH and / or the number of layers of the PSSCH.

[0096] Thus, the configuration of the DMRS of PSSCH and / or the number of layers of PSSCH can be obtained through SCI or through the next level SCI.

[0097] In this embodiment, optionally, the ratio of the energy EPR of the target control information per unit resource element to the EPR of the used DMRS is determined based on at least one of the following:

[0098] The type of DMRS used;

[0099] The DMRS multiplexing method used;

[0100] The number of code division multiplexing (CDM) groups used in the DMRS;

[0101] The number of layers of the target control information;

[0102] The number of layers in PSSCH;

[0103] Location of time and frequency resources for PSSCH;

[0104] The mapping method of data on PSSCH.

[0105] When the ratio beta of the target control information's EPR to the EPR of the used DMRS is related to the multiplexing method of the used DMRS:

[0106] a) If the DMRS used is an FDM multiplexing mode, beta is 0dB (that is, the EPRE of the target control information is equal to the EPRE of the DMRS used).

[0107] b) If the DMRS used is a CDM multiplexing mode, the beta is 3dB (that is, the EPRE of the target control information is twice the EPRE of the DMRS used), or the beta is 4.77dB (that is, the EPRE of the target control information is three times the EPRE of the DMRS).

[0108] The ratio beta of the EPRE of the target control information to the EPRE of the used DMRS is related to the multiplexing method of the used DMRS, the number of layers of the target control information, and the number of layers of PSSCH:

[0109] a) If the multiplexing method of the DMRS used is FDM, and the number of layers of the next level SCI is equal to the number of layers of PSSCH, then the EPRE of the target control information is half of the EPRE of the DMRS used.

[0110] b) If the multiplexing method of the DMRS used is FDM, and the number of layers of the next-level SCI is less than the number of layers of PSSCH, then the EPRE of the target control information is equal to the EPRE of the DMRS used.

[0111] c) If the DMRS multiplexing method used is CDM, and the number of layers of the next level SCI is equal to the number of layers of PSSCH, then the EPRE of the target control information is equal to the EPRE of the DMRS used.

[0112] d) If the DMRS multiplexing method used is CDM, and the number of layers of the next level SCI is less than the number of layers of PSSCH, then the EPRE of the target control information is twice the EPRE of the DMRS used.

[0113] The ratio beta of the EPR of the target control information to the EPR of the DMRS used is related to the multiplexing method of the DMRS used, the number of layers of the target control information, the number of layers of the PSSCH, and the mapping method of the data on the PSSCH:

[0114] a) If the multiplexing method of the DMRS used is FDM, the number of layers of the next-level SCI is less than the number of layers of PSSCH, and the data of PSSCH performs rate matching on the resources of the target control information, then the EPRE of the target control information is equal to the EPRE of the DMRS used.

[0115] b) If the DMRS multiplexing method used is FDM, the number of layers of the next level SCI is less than the number of layers of PSSCH, and the PSSCH data punches the resources of the target control information, then the EPRE of the target control information is half of the EPRE of the DMRS used.

[0116] c) If the DMRS multiplexing method used is CDM, the number of layers of the next-level SCI is less than the number of layers of PSSCH, and the PSSCH data performs rate matching on the target control information resources, then the EPRE of the target control information is twice that of the DMRS used.

[0117] d) If the DMRS multiplexing method used is CDM, the number of layers of the next level SCI is less than the number of layers of PSSCH, and the PSSCH data punches the resources of the target control information, then the EPRE of the target control information is equal to the EPRE of the DMRS used.

[0118] The following describes the application of the method in this embodiment of the disclosure using a specific scenario: joint scheduling of PSSCH by two-level SCIs. The SCI will be referred to as the first SCI, and the next-level SCI as the second SCI.

[0119] Scenario 1: The protocol predefines the time-domain resources of the first SCI as symbols 2 and 3. Starting from the second symbol, the first SCI is mapped to the allocated available resources in a time-domain priority manner. The protocol predefines / network configures the DMRS pattern of the PSSCH as a 1-symbol DMRS, type 1 configuration. For example, the DMRS used by the second SCI is the first DMRS of the PSSCH.

[0120] When determining the first position as the next symbol of the first DMRS configured for PSSCH, the second SCI begins mapping at the next symbol of the first DMRS configured for PSSCH. It is also mapped at the predefined / network pre-configured associated DMRS port / PSSCH layer (e.g., Layer 1).

[0121] a) In the single-port transmission shown in Figure 3, the DMRS of the PSSCH is a mapping of comb 2. Data on the PSSCH is mapped starting from the symbol where the first DMRS of the PSSCH is located, and rate matching is performed on the position of the second SCI. The ratio beta of the EPRE of the second SCI to the DMRS of the PSSCH is 0 dB.

[0122] b) If the two ports are transmitted as shown in Figure 4 or Figure 5, and the two ports of PSSCH are mapped using FDM.

[0123] i. The PSSCH applies rate matching / puncturing to the time-frequency domain resources of the second SCI (as shown in Figure 4). That is, if the second SCI is transmitted only at a single layer, neither layer's PSSCH maps PSSCH data to the corresponding time-frequency domain resources (REs) of the SCI. In this example, the second SCI is mapped only to the 5th symbol of Layer 1; PSSCH data is not mapped to the 5th symbols of either Layer 1 or Layer 2. The ratio beta of the EPRE of the second SCI to the DMRS of the PSSCH is 0 dB.

[0124] ii. Alternatively, the PSSCH performs rate matching / puncturing in the time-frequency domain of the layer mapped by the second SCI (as shown in Figure 5). That is, if the second SCI is transmitted only at a single layer, the second SCI and PSSCH are encoded, then bit-interleaved and / or concatenated, and then modulated to map the modulated information onto two layers, so that the second SCI is mapped to a certain associated PSSCH layer (layer 1) / DMRS port. In this example, the second SCI is mapped only on the 5th symbol of layer 1, and the 5th symbol of layer 2 contains data mapped to the PSSCH. The EPRE of the second SCI is half the EPRE of the DMRS of the PSSCH. Of course, depending on the load size, the second SCI may be fully mapped on the 5th symbol, may only occupy part of the resources, or may need to be mapped to the 6th symbol or more; this will not be elaborated further here.

[0125] In this scenario, the design rules ensure that the DMRS power of PSSCH DMRS port 1 used by the receiving terminal to demodulate the second SCI is independent of the number of layers in the PSSCH, and the symbol position of the second-level SCI is also independent of the number of layers in the PSSCH. Therefore, the configuration of the PSSCH DMRS can be carried in the second SCI.

[0126] The receiving terminal detects the second SCI starting from the fifth symbol on PSSCH DMRS port 1, demodulates the second SCI using the first DMRS, obtains the configuration of the PSSCH DMRS and / or the number of PSSCH layers, and demodulates the PSSCH according to the configuration of the PSSCH DMRS and the predefined configuration.

[0127] Scenario 2: The network pre-configures the time-domain resources of the first SCI as symbols 2 and 3. Starting from symbol 2, the first SCI maps to allocated available resources in a time-domain priority manner. The protocol pre-defined / network configured PSSCH DMRS pattern is a 1-symbol DMRS, type 1 configuration. The first SCI indicates the PSSCH DMRS configuration and / or the PSSCH layer number. The second SCI uses the first DMRS of the PSSCH.

[0128] When determining the symbol where the first DMRS configured for PSSCH resides, the second SCI begins mapping at that symbol. Furthermore, it maps to the predefined / network-preconfigured associated DMRS port / PSSCH layer (e.g., Layer 1).

[0129] a) In the single-port transmission shown in Figure 6, the DMRS of the PSSCH is a mapping of comb 2. The PSSCH is transmitted starting from the symbol following the symbol containing the first DMRS of the PSSCH, and rate matching or puncturing is performed on the second SCI. The ratio beta of the EPRE of the second SCI to the EPRE of the DMRS of the PSSCH is 0 dB.

[0130] b) If the two ports are transmitted as shown in Figure 7 or Figure 8, and the two ports of PSSCH are multiplexed using CDM.

[0131] i. The PSSCH employs rate matching / puncturing on the time-frequency domain resources of the second SCI (as shown in Figure 7). That is, the second SCI is transmitted only at a single layer, and PSSCH data is not mapped on the time-frequency domain resources corresponding to either layer's PSSCH. In this example, the second SCI is mapped only on the 4th and 5th symbols of layer 1; PSSCH data is not mapped on the 4th and 5th symbols of either layer 1 or layer 2. The ratio beta of the EPRE of the second SCI to the DMRS of the PSSCH is 3 dB.

[0132] ii. Alternatively, the PSSCH performs rate matching / puncturing in the time-frequency domain of the layer mapped by the second SCI (as shown in Figure 8). That is, the second SCI is transmitted only at a single layer. After encoding, the second SCI and PSSCH are bit-interleaved and / or concatenated, then modulated, etc., mapping the modulated information onto two layers, so that the second SCI is mapped onto the associated PSSCH layer (layer 1) / DMRS port. In this example, the second SCI is mapped only on the 4th and 5th symbols of layer 1, and PSSCH data is mapped on the 5th symbol of layer 2. The 4th and 5th symbols of layer 2 also contain mapped PSSCH data. The ratio beta of the EPRE of the second SCI to the EPRE of the PSSCH DMRS is 0 dB.

[0133] In this scenario, the DMRS power of PSSCH DMRS port 1 used by the receiving terminal to demodulate the second SCI is related to the number of layers of PSSCH. Before demodulating the second SCI, the number of layers of PSSCH and / or DMRS configuration can be obtained from the first SCI to determine the DMRS power.

[0134] The receiving terminal receives and demodulates the first SCI, obtaining the configuration of the DMRS of the PSSCH and / or the layer number of the PSSCH. Then, it obtains the power and pattern of the layer 1 DMRS. Starting from the 4th symbol, it detects the second SCI and demodulates it according to the layer 1 DMRS. Further, it obtains additional PSSCH scheduling information and demodulates the PSSCH.

[0135] Scenario 3: The network pre-configures the time-domain resources of the first SCI as symbols 2 and 3. Starting from symbol 2, the first SCI is mapped onto the allocated available resources in a time-domain priority manner. The first SCI configures the DMRS of the PSSCH using CDM multiplexing. The second SCI is predefined as being transmitted at PSSCH layer 1, along with the mapping layer and port. The protocol pre-defined / network configured the PSSCH DMRS pattern as 1-symbol DMRS, type 1 configuration. The DMRS configuration used by the second SCI is the same as the PSSCH DMRS configuration. For example, the second SCI uses the first DMRS of the PSSCH.

[0136] When determining the symbol where the first DMRS configured for PSSCH resides, the second SCI begins mapping on the symbol where the first DMRS configured for PSSCH resides, mapping on the predefined DMRS port / PSSCH layer (e.g., layer 1). The ratio beta of the EPRE of the second SCI to the EPRE of the DMRS of PSSCH is 0 dB, as shown in Figure 6.

[0137] The receiving terminal receives and demodulates the first SCI, obtains the DMRS configuration of the PSSCH, and determines that the PSSCH DMRS is CDM multiplexed. Then, the receiving terminal receives the second SCI on Layer 1 corresponding to the PSSCH DMRS port, starting to detect the second SCI from the 4th symbol.

[0138] In this configuration, if the first SCI is configured with the DMRS of the PSSCH, FDM multiplexing is used. When the first position is determined to be the next symbol of the first DMRS configured for the PSSCH, the second SCI begins mapping from the next symbol of the first DMRS configured for the PSSCH, mapping on a predefined DMRS port / PSSCH layer (e.g., layer 1). The ratio beta of the EPRE of the second SCI to the EPRE of the PSSCH DMRS is 0 dB, as shown in Figure 4. At this time, the receiving terminal receives and demodulates the first SCI, obtains the DMRS configuration of the PSSCH, and determines that the PSSCH DMRS is FDM multiplexed. Then, the receiving terminal receives the second SCI on layer 1 corresponding to the PSSCH DMRS port, starting the detection of the second SCI from the fifth symbol.

[0139] In this scenario, DMRS is flexibly configurable and can be multiplexed using either FDM or CDM. The UE applies the corresponding mapping rules to the second SCI based on the multiplexing method.

[0140] Scenario 4: The network pre-configures the time-domain resources of the first SCI as symbols 2 and 3. Starting from symbol 2, the first SCI maps to allocated available resources in a time-domain priority manner. The first SCI configures the DMRS of the PSSCH, and the PSSCH is a two-layer transmission. The second SCI is predefined to map to the same number of layers as the PSSCH (i.e., the second SCI is a two-layer transmission), or the first SCI indicates that the second SCI is a two-layer transmission. The protocol pre-defined / network configured the PSSCH DMRS pattern as a 1-symbol DMRS, type 1 configuration. The DMRS configuration used by the second SCI is the same as the PSSCH DMRS configuration. For example, the second SCI uses the first DMRS of the PSSCH.

[0141] When determining the symbol or the next symbol where the first DMRS configured for PSSCH is located, the second SCI begins mapping at the symbol or the next symbol where the first DMRS configured for PSSCH is located.

[0142] a) If, as shown in Figure 9, the DMRS of the PSSCH is CDM multiplexed, then the second SCI begins mapping at the symbol containing the first DMRS configured in the PSSCH, and is mapped on both layers of the PSSCH. That is, after the second SCI and PSSCH are encoded, they undergo bit interleaving and / or concatenation, followed by modulation, etc., to map the modulated information onto both layers, so that the second SCI is mapped to the corresponding positions on both layers of the PSSCH (the 4th and 5th symbols of layer 1 and layer 2). The ratio beta of the EPRE of the second SCI to the DMRS of the PSSCH is 0 dB.

[0143] b) If the DMRS of the PSSCH is FDM multiplexed as shown in Figure 10, then the second SCI is mapped starting from the symbol following the first DMRS configured in the PSSCH, and mapped on both layers of the PSSCH. That is, after the second SCI and PSSCH are encoded, bit interleaving and / or concatenation are performed, followed by modulation, etc., so that the modulated information is mapped on both layers, making the second SCI mapped to the corresponding positions on both layers of the PSSCH (the 5th symbol of layer 1 and layer 2). The ratio beta of the EPRE of the second SCI to the DMRS of the PSSCH is -3dB.

[0144] Scenario 5: The network pre-configures the time-domain resources of the first SCI as the second and third symbols. Starting from the second symbol, the first SCI is mapped onto the allocated available resources in a time-domain priority manner.

[0145] When the first position is determined to be the first symbol after the first SCI, the second SCI is mapped starting from the fourth symbol (the first symbol after the first SCI). If Figure 11 shows a single-port transmission, the ratio beta of the EPRE of the second SCI to the EPRE of the PSCCH DMRS is 0 dB. If Figure 12 shows a two-port transmission, the ratio beta of the EPRE of the second SCI to the EPRE of the PSCCH DMRS is 3 dB.

[0146] The receiving terminal uses the DMRS of the first SCI to demodulate the second SCI.

[0147] Scenario 6: The network pre-configures the time-domain resources of the first SCI as symbols 2 and 3. Starting from symbol 2, the first SCI is mapped onto the allocated available resources in a time-domain priority manner. The first SCI indicates that the second SCI has one layer, or the first SCI indicates that the PSSCH has one layer, and the second SCI has the same number of layers as the PSSCH (i.e., the second SCI has one layer). The configuration of the DMRS used by the second SCI can be defined independently, such as using comb 4 DMRS.

[0148] When the first position is determined to be the first symbol after the first SCI, the second SCI is mapped at layer 1 starting from the fourth symbol (the first symbol after the first SCI), as shown in Figure 13.

[0149] The receiving terminal demodulates the first SCI to obtain the layer number of the second SCI. Based on the layer number of the second SCI and the independently defined DMRS, the second SCI is then demodulated.

[0150] Specifically, if the first-level SCI indicates that the second SCI has two layers, or if the first SCI indicates that the PSSCH has two layers, the second SCI has the same number of layers as the PSSCH (i.e., the second SCI has two layers). When the first position is determined to be the first symbol after the first SCI, the second SCI is mapped across two layers starting from the fourth symbol (the first symbol after the first SCI), as shown in Figure 14. The receiving terminal demodulates the first SCI to obtain the layer number of the second SCI. Based on the layer number of the second SCI and the independently defined DMRS, the second SCI is demodulated.

[0151] Of course, the above scenarios are all based on the case of two-level SCI scheduling PSSCH. The same applies to the case of transmitting SFCI when scheduling PSSCH with a single-level SCI, and will not be listed here.

[0152] In summary, the method of this disclosure embodiment transmits SCI and target control information according to a resource mapping pattern (used to indicate the transmission resources of PSSCH and target control information for SCI scheduling), thereby transmitting the target control information to the terminal at the other end. This ensures the performance of SCI or SFCI while improving the demodulation performance of PSSCH and the capacity of the system.

[0153] Figure 15 is a block diagram of a terminal according to an embodiment of the present disclosure. The terminal 1500 shown in Figure 15 includes a transmission module 1510.

[0154] The transmission module 1510 is used to transmit side link control information (SCI) and target control information according to a resource mapping pattern; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical side link shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or the side link feedback control information (SFCI).

[0155] Optionally, in the resource mapping pattern, the target control information is mapped starting from a first position in the time domain and starting from a second position in the frequency domain; wherein,

[0156] The first position and / or the second position are determined based on at least one of the following information:

[0157] The position of the demodulation reference signal DMRS of PSSCH;

[0158] Transmit configuration parameters;

[0159] The number of layers in PSSCH;

[0160] The configuration of the DMRS used;

[0161] SFCI configuration information;

[0162] The type of service being transmitted;

[0163] Resources allocated by PSSCH;

[0164] SCI resource allocation.

[0165] Optionally, the location of the DMRS in the PSSCH is:

[0166] The position of the Nth DMRS or the Nth DMRS set in PSSCH, where N is an integer greater than or equal to 1; or

[0167] The position of the front-end DMRS in PSSCH.

[0168] Optionally, the transmission configuration parameters include at least one of the following: number of layers, load, and bit rate.

[0169] Optionally, the configuration of the DMRS used includes at least one of the following: the type of DMRS, the number of symbols, and the multiplexing method.

[0170] Optionally, the configuration information of the SFCI includes: whether to carry an SFCI;

[0171] If an SFCI is carried, the SFCI configuration information also includes: the SFCI's transmission resources and / or the size of the information carried by the SFCI.

[0172] Optionally, the service type transmitted includes multicast, unicast, or broadcast.

[0173] Optionally, the resources allocated by the PSSCH include: frequency domain resources allocated by the PSSCH and / or time domain resources allocated by the PSSCH.

[0174] Optionally, in the resource mapping pattern, the target control information on the target layer is mapped from a first position in the time domain and from a second position in the frequency domain, wherein the target layer is a single layer or multiple layers.

[0175] Optionally, the target layer is predefined or indicated by the SCI.

[0176] Optionally, the number of the target layer is related to the number of layers of the PSSCH or the physical sidelink control channel PSCCH by predefinition or the SCI indication.

[0177] Optionally, in the resource mapping pattern, the target control information is mapped in the time domain starting from the symbol containing the Nth DMRS or the Nth DMRS set or the preceding DMRS or the Lth symbol after that symbol, and in the frequency domain starting from the Mth PRB in the physical resource blocks (PRBs) allocated by the PSSCH; wherein the Mth PRB is the highest PRB or the lowest PRB or the edge PRB of the target frequency domain region, M is an integer greater than or equal to 1, and L is an integer greater than or equal to 1.

[0178] Optionally, in the resource mapping pattern, the target control information is mapped in the time domain starting from the Pth symbol after the SCI, and in the frequency domain starting from the Qth PRB of the SCI; where Q is an integer greater than or equal to 1, and P is an integer greater than or equal to 1.

[0179] Optionally, in the resource mapping pattern, the target control information is mapped in the time domain starting from the first available symbol allocated by PSSCH or the first available symbol that does not carry DMRS.

[0180] Optionally, in the resource mapping pattern, when carrying SFCI, the mapping of the next-level SCI will perform rate matching or punching on the position of the SFCI.

[0181] Optionally, when the service type of the transmission is multicast or unicast, in the resource mapping pattern, the mapping of the next-level SCI will perform rate matching or punching on the position of the SFCI.

[0182] Optionally, the target control information corresponds to the configuration of one or more DMRS;

[0183] When the target control information corresponds to the configuration of multiple DMRS, the configuration of the DMRS used is determined by predefinition or by the SCI.

[0184] Optionally, the DMRS configuration used by the target control information is the same as the DMRS configuration of PSSCH, either through predefined settings or indicated by the SCI.

[0185] Optionally, the SCI or the next-level SCI indicates the configuration of the DMRS of the PSSCH and / or the number of layers of the PSSCH.

[0186] Optionally, the ratio of the energy per unit resource element (EPRE) of the target control information to the EPRE of the used DMRS is determined based on at least one of the following:

[0187] The type of DMRS used;

[0188] The DMRS multiplexing method used;

[0189] The number of code division multiplexing (CDM) groups used in the DMRS;

[0190] The number of layers of the target control information;

[0191] The number of layers in PSSCH;

[0192] Location of time and frequency resources for PSSCH;

[0193] The mapping method of data on PSSCH.

[0194] It should be noted that this terminal is a terminal that applies the information transmission method of the above embodiments. The implementation of the information transmission method of the above embodiments is applicable to this terminal and can achieve the same technical effect.

[0195] Terminal 1500 can implement the various processes implemented by the terminal in the method embodiments of Figures 2 to 14. To avoid repetition, they will not be described again here. The terminal in this embodiment of the disclosure will transmit SCI and target control information according to the resource mapping pattern (used to indicate the transmission resources of PSSCH and target control information for SCI scheduling), which improves the demodulation performance of PSSCH and the system capacity while ensuring the performance of SCI or SFCI.

[0196] Figure 16 is a schematic diagram of the hardware structure of a terminal implementing various embodiments of the present disclosure. The terminal 1600 includes, but is not limited to, components such as: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, a processor 1610, and a power supply 1611. Those skilled in the art will understand that the terminal structure shown in Figure 16 does not constitute a limitation on the terminal. A terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements. In the embodiments of the present disclosure, the terminal includes, but is not limited to, mobile phones, tablet computers, laptop computers, PDAs, in-vehicle terminals, wearable devices, and pedometers.

[0197] The radio frequency unit 1601 is used to transmit side link control information (SCI) and target control information according to a resource mapping pattern. The resource mapping pattern is used to indicate the transmission resources of the physical side link shared channel (PSSCH) and target control information scheduled by the SCI. The target control information is the next-level SCI or the side link feedback control information (SFCI).

[0198] As can be seen, the terminal transmits SCI and target control information (next-level SCI or SFCI) according to the resource mapping pattern (used to indicate the transmission resources of PSSCH and target control information for SCI scheduling), ensuring the performance of SCI or SFCI while improving the demodulation performance of PSSCH and the capacity of the system.

[0199] It should be understood that in this embodiment, the radio frequency unit 1601 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink data from the base station and processes it with the processor 1610; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 1601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc. Furthermore, the radio frequency unit 1601 can also communicate with networks and other devices through a wireless communication system.

[0200] The terminal provides users with wireless broadband internet access through network module 1602, such as helping users send and receive emails, browse web pages, and access streaming media.

[0201] The audio output unit 1603 can convert audio data received by the radio frequency unit 1601 or the network module 1602 or stored in the memory 1609 into audio signals and output them as sound. Furthermore, the audio output unit 1603 can also provide audio output related to specific functions performed by the terminal 1600 (e.g., call signal reception sound, message reception sound, etc.). The audio output unit 1603 includes a speaker, a buzzer, and a receiver, etc.

[0202] Input unit 1604 is used to receive audio or video signals. Input unit 1604 may include a graphics processing unit (GPU) 16041 and a microphone 16042. GPU 16041 processes image data of still images or videos acquired by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on display unit 1606. The image frames processed by GPU 16041 can be stored in memory 1609 (or other storage medium) or transmitted via radio frequency unit 1601 or network module 1602. Microphone 16042 can receive sound and process such sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via radio frequency unit 1601 in telephone call mode.

[0203] Terminal 1600 also includes at least one sensor 1605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 16061 according to the ambient light level, and the proximity sensor can turn off the display panel 16061 and / or backlight when the terminal 1600 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used to identify the terminal's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Sensor 1605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which will not be described in detail here.

[0204] The display unit 1606 is used to display information input by the user or information provided to the user. The display unit 1606 may include a display panel 16061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0205] User input unit 1607 can be used to receive input numerical or character information, and generate key signal inputs related to user settings and function control of the terminal. Specifically, user input unit 1607 includes a touch panel 16071 and other input devices 16072. Touch panel 16071, also known as a touch screen, can collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 16071). Touch panel 16071 may include two parts: a touch detection device and a touch controller. The touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to processor 1610, which receives and executes commands from processor 1610. In addition, touch panel 16071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 16071, the user input unit 1607 may also include other input devices 16072. Specifically, other input devices 16072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, joysticks, etc., which will not be described in detail here.

[0206] Furthermore, the touch panel 16071 can cover the display panel 16061. When the touch panel 16071 detects a touch operation on or near it, it transmits the information to the processor 1610 to determine the type of touch event. Subsequently, the processor 1610 provides corresponding visual output on the display panel 16061 according to the type of touch event. Although in Figure 16, the touch panel 16071 and the display panel 16061 are shown as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 16071 and the display panel 16061 can be integrated to implement the input and output functions of the terminal. Specific details are not limited here.

[0207] Interface unit 1608 serves as an interface for connecting external devices to terminal 1600. For example, external devices may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and so on. Interface unit 1608 can be used to receive input from external devices (e.g., data, power, etc.) and transmit the received input to one or more elements within terminal 1600, or it can be used to transmit data between terminal 1600 and external devices.

[0208] The memory 1609 can be used to store software programs and various data. The memory 1609 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory 1609 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0209] The processor 1610 is the control center of the terminal, connecting various parts of the terminal through various interfaces and lines. It performs various functions and processes data by running or executing software programs and / or modules stored in the memory 1609 and calling data stored in the memory 1609, thereby providing overall monitoring of the terminal. The processor 1610 may include one or more processing units; optionally, the processor 1610 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 1610.

[0210] Terminal 1600 may also include a power supply 1611 (such as a battery) to power various components. Optionally, the power supply 1611 may be logically connected to the processor 1610 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0211] In addition, terminal 1600 includes some functional modules not shown, which will not be described in detail here.

[0212] Optionally, this disclosure also provides a terminal, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the various processes of the above-described information transmission method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0213] This disclosure also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the various processes of the above-described information transmission method embodiments and achieves the same technical effects. To avoid repetition, further details are omitted here. The computer-readable storage medium may include, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0214] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0215] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0216] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. An information transmission method, comprising: According to the resource mapping pattern, the side link control information (SCI) and target control information are transmitted; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical side link shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or the side link feedback control information (SFCI).

2. The method according to claim 1, wherein, In the resource mapping pattern, the target control information is mapped starting from a first position in the time domain and starting from a second position in the frequency domain; wherein... The first position and / or the second position are determined based on at least one of the following information: The position of the demodulation reference signal DMRS of PSSCH; Transmit configuration parameters; The number of layers in PSSCH; The configuration of the DMRS used; SFCI configuration information; The type of service being transmitted; Resources allocated by PSSCH; SCI resource allocation.

3. The method according to claim 2, wherein, The location of the DMRS in the PSSCH is: The position of the Nth DMRS or the Nth DMRS set in PSSCH, where N is an integer greater than or equal to 1; or The position of the front-end DMRS in PSSCH.

4. The method according to claim 2, wherein, The transmission configuration parameters include at least one of the following: number of layers, load, and bit rate.

5. The method according to claim 2, wherein, The configuration of the DMRS used includes at least one of the following: DMRS type, number of symbols, and multiplexing method.

6. The method according to claim 2, wherein, The configuration information of the SFCI includes: whether it carries an SFCI; If an SFCI is carried, the SFCI configuration information also includes: the SFCI's transmission resources and / or the size of the information carried by the SFCI.

7. The method according to claim 2, wherein, The types of services transmitted include multicast, unicast, or broadcast.

8. The method according to claim 2, wherein, The resources allocated by the PSSCH include: frequency domain resources allocated by the PSSCH and / or time domain resources allocated by the PSSCH.

9. The method according to claim 2, wherein, In the resource mapping pattern The target control information on the target layer is mapped starting from a first position in the time domain and starting from a second position in the frequency domain, wherein the target layer is a single layer or multiple layers.

10. The method according to claim 9, wherein, The target layer is either predefined or indicated by the SCI.

11. The method according to claim 10, wherein, The number of the target layer is related to the number of layers of the PSSCH or the Physical Sidelink Control Channel (PSCCH) by predefinition or by the SCI indication.

12. The method according to claim 2, wherein, In the resource mapping pattern The target control information is mapped in the time domain starting from the symbol containing the Nth DMRS or the Nth DMRS set or the preceding DMRS, or the Lth symbol after that symbol. In the frequency domain, it is mapped starting from the Mth PRB in the physical resource blocks (PRBs) allocated by the PSSCH. The Mth PRB is the highest PRB, the lowest PRB, or the edge PRB of the target frequency domain region, where M is an integer greater than or equal to 1 and L is an integer greater than or equal to 1.

13. The method according to claim 2, wherein, In the resource mapping pattern The target control information is mapped in the time domain starting from the Pth symbol after the SCI, and in the frequency domain starting from the Qth PRB of the SCI; where Q is an integer greater than or equal to 1, and P is an integer greater than or equal to 1.

14. The method according to claim 2, wherein, In the resource mapping pattern The target control information is mapped in the time domain starting from the first available symbol allocated by PSSCH or the first available symbol that does not carry DMRS.

15. The method according to claim 2, wherein, In the resource mapping pattern, when SFCI is carried, the mapping of the next-level SCI will perform rate matching or punching on the position of the SFCI.

16. The method according to claim 2, wherein, When the service type of the transmission is multicast or unicast, in the resource mapping pattern, the mapping of the next-level SCI will perform rate matching or punching on the position of the SFCI.

17. The method according to claim 1, wherein, The target control information corresponds to the configuration of one or more DMRS; When the target control information corresponds to the configuration of multiple DMRS, the configuration of the DMRS used is determined by predefinition or by the SCI.

18. The method according to claim 1, wherein, The configuration of the DMRS used by the target control information is the same as that of the DMRS of PSSCH, either through predefined means or indicated by the SCI.

19. The method according to claim 1, wherein, The SCI or the next-level SCI indicates the configuration of the DMRS of the PSSCH and / or the number of layers of the PSSCH.

20. The method according to claim 1, wherein, The ratio of the energy per unit resource element (EPRE) of the target control information to the EPRE of the used DMRS is determined based on at least one of the following: The type of DMRS used; The DMRS multiplexing method used; The number of code division multiplexing (CDM) groups used in the DMRS; The number of layers of the target control information; The number of layers in PSSCH; Location of time and frequency resources for PSSCH; The mapping method of data on PSSCH.

21. The method according to claim 2, wherein, The location of the DMRS in the PSSCH is SCI indication, terminal radio resource control RRC configuration, predefined, network downlink control information DCI configuration, network RRC configuration, or network pre-configuration; The transmission configuration parameters are SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration; The number of layers in the PSSCH is determined by SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration. The DMRS configuration used is SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration; The configuration information of the SFCI is SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration; The service type transmitted is SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration; The resources allocated by the PSSCH are SCI indication, terminal RRC configuration, predefined, network DCI configuration, network RRC configuration, or network pre-configuration.

22. A terminal, comprising: The transmission module is used to transmit sidelink control information (SCI) and target control information according to a resource mapping pattern; wherein, the resource mapping pattern is used to indicate the transmission resources of the physical sidelink shared channel (PSSCH) and target control information scheduled by the SCI, and the target control information is the next-level SCI or sidelink feedback control information (SFCI).

23. A terminal comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the information transmission method as described in any one of claims 1 to 21.

24. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the information transmission method as described in any one of claims 1 to 21.