Sidelink resource multiplexing method and device, and sidelink resource indication method and device

Abstract

To provide a side link resource multiplexing method and device, and a side link resource indication method and device.SOLUTION: In a communication system, a method includes the steps of: receiving, by a terminal device or a second device which is a roadside device or a network device, length information transmitted by the terminal device or network device (for example, a base station) and representing a length of a first part of a slot; and transmitting and / or receiving, by the second device, side link information to and from the first device (terminal device) based upon the length information. Consequently, the second device can process the first part based upon the length information and thereby improve performance of side link transmission.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to the field of communications, and in particular to a method and apparatus for sidelink resource multiplexing and a method and apparatus for sidelink resource indication. [Background technology]

[0002] V2X (Vehicle to Everything) is a vehicle communication technology that enables information interaction between vehicles, vehicles and roadside equipment, and vehicles and pedestrians. In V2X, a transmitter can communicate directly with a receiver via a sidelink. Unlike the Uu link (air interface between a network device and a user device) of a cellular network, the sidelink is a newly defined air interface (air interface between V2X devices) for V2X. The sidelink may use the frequency resources of the Uu link of a cellular network or may use dedicated frequency resources.

[0003] The sidelink transmits control information via a Physical Sidelink Control Channel (PSCCH) and data information via a Physical Sidelink Shared Channel (PSSCH). Long Term Evolution (LTE) V2X only supports broadcast services. For example, a transmitter broadcasts traffic safety information to surrounding receivers, and broadcast services do not need to introduce feedback. Therefore, LTE V2X does not support Hybrid Automatic Repeat reQuest (HARQ) feedback and / or Channel State Information (CSI) feedback.

[0004] New Radio (NR) V2X is currently one of the research projects in the Rel-16 standard. Compared to LTE V2X, NR V2X must support many new scenarios and new services (e.g., remote driving, autonomous driving, and fleet driving) and must meet higher technical standards (e.g., high reliability, low latency, and high data rates). NR V2X must also support unicast and groupcast in addition to broadcast to meet the needs of various scenarios and services.

[0005] Unlike broadcast, HARQ feedback and / or CSI feedback are very important for unicast and groupcast. The transmitting device may determine whether to schedule retransmission based on the HARQ feedback result to avoid resource waste due to blind retransmission. To achieve high data rate transmission, the transmitting device may perform link adaptation based on the CSI measurement and feedback result, such as selecting an optimal modulation and coding scheme (MCS), precoding matrix indicator (PMI), beam, rank, etc. for the current channel.

[0006] The above description of the background art is merely for the purpose of explaining the configuration of the present invention more clearly and completely, and is provided for the understanding of those skilled in the art. These configurations described in the background art of the present invention should not be construed as being well known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0007] Due to the discovery of the inventors of the present invention, current NR V2X defines a new physical channel called the Physical Sidelink Feedback Channel (PSFCH), which is used to carry HARQ feedback information and / or CSI (hereinafter collectively referred to as feedback information). The PSFCH does not occupy an entire slot in the time domain, and the number of symbols occupied by the PSFCH (i.e., the length of the PSFCH) may also vary depending on the feedback information overhead.

[0008] Therefore, the PSFCH causes interference or rapid changes in signal strength in units of less than the time length of a slot, which affects the PSCCH and PSSCH multiplexed with the PSFCH. These effects include increased accuracy or complexity of automatic gain control (AGC) estimation, degradation of channel estimation performance due to collisions between symbols containing demodulation reference signals (DM-RS) and AGC symbols, and increased complexity of power control and adjustment due to rapid changes in transmit power within a slot. Multiplexing the PSFCH, PSCCH, and PSSCH in NR V2X must solve the above problems.

[0009] To solve at least one of the above problems, embodiments of the present invention provide a sidelink resource multiplexing method and apparatus, and a sidelink resource indication method and apparatus. [Means for solving the problem]

[0010] A first aspect of an embodiment of the present invention provides a sidelink resource multiplexing method, comprising: a step of receiving, by a second device, length information transmitted by a terminal device or a network device, the length information indicating a length of a first portion of a slot; and a step of transmitting and / or receiving sidelink information with a first device based on the length information by the second device.

[0011] A second aspect of the present invention provides a sidelink resource multiplexing device, the device comprising: a receiving unit configured to receive length information, transmitted by a terminal device or a network device, indicating a length of a first portion of a slot; and a processing unit configured to transmit and / or receive sidelink information with the first device based on the length information.

[0012] A third aspect of an embodiment of the present invention provides a method for indicating sidelink resources, comprising the step of a terminal device or a network device transmitting length information indicating a length of a first portion of a slot to a second device, the length information being used by the second device for transmitting and / or receiving sidelink information with the first device.

[0013] In a fourth aspect of an embodiment of the present invention, there is provided an apparatus for indicating sidelink resources, the apparatus comprising: a transmitter configured to transmit length information to a second device, the length information being indicative of a length of a first portion of a slot, the length information being used by the second device for transmitting and / or receiving sidelink information to and from the first device.

[0014] In a fifth aspect of an embodiment of the present invention, there is provided a communication system including: a first device that performs sidelink communication with a second device; and a second device that receives length information, transmitted by a terminal device or a network device, indicating a length of a first portion of a slot, and transmits and / or receives sidelink information with the first device based on the length information.

[0015] One advantageous effect of the embodiment of the present invention is that the second device receives length information transmitted by the terminal device or the network device, indicating the length of the first portion of a slot, and transmits and / or receives sidelink information with the first device based on the length information, thereby enabling the second device to process the first portion based on the length information, thereby improving the performance of sidelink transmission (e.g., improving the accuracy of AGC estimation).

[0016] As shown in the following description and drawings, specific embodiments of the present invention are disclosed in detail to illustrate ways in which the principles of the present invention can be employed. However, the scope of the present invention is not limited to these embodiments. The present invention encompasses all modifications, alterations, and equivalents within the spirit and scope of the appended claims.

[0017] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in other embodiments, or may be substituted for features in other embodiments.

[0018] It should be noted that in this text, the term "comprise / have" means that a feature, element, step or component is present, but does not exclude the presence or addition of one or more other features, elements, steps or components. [Brief explanation of the drawings]

[0019] Elements and features depicted in one drawing and one embodiment of an example of the invention may be combined with elements and features shown in one or more drawings or embodiments, and in the drawings, like reference numerals may indicate corresponding elements in multiple drawings and may indicate corresponding elements used in more than one embodiment. [Figure 1] 1 is a schematic diagram of a communication system according to an embodiment of the present invention; [Figure 2] FIG. 1 is a schematic diagram of a sidelink resource multiplexing method according to an embodiment of the present invention; [Figure 3] FIG. 1 is a schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 4] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 5] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 6] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 7] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 8] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 9] FIG. 1 is a schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 10] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 11] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 12] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 13] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 14] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 15] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 16] FIG. 2 is a schematic diagram of a resource pool configuration according to an embodiment of the present invention. [Figure 17] FIG. 10 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. [Figure 18] FIG. 10 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. [Figure 19] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 20] FIG. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention; [Figure 21] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 22] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 23] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 24] FIG. 10 is another schematic diagram of sidelink resources according to an embodiment of the present invention; [Figure 25] FIG. 10 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. [Figure 26] FIG. 10 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. [Figure 27] FIG. 1 is a schematic diagram of a sidelink resource multiplexing device according to an embodiment of the present invention; [Figure 28] FIG. 1 is a schematic diagram of a sidelink resource indication device according to an embodiment of the present invention; [Figure 29] FIG. 1 is a schematic diagram of a network device according to an embodiment of the present invention. [Figure 30] FIG. 2 is a schematic diagram of a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The above and other features of the present invention will become apparent from the following description. In the specification and drawings, specific embodiments of the present invention are disclosed in detail, and some of the embodiments in which the principles of the present invention can be adopted are shown. However, the present invention is not limited to the described embodiments. The present invention includes all modifications, variations, and equivalents within the scope of the appended claims. Below, various embodiments of the present invention will be described with reference to the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0021] In embodiments of the present invention, the terms "first," "second," etc. are used in titles to distinguish between different elements, but do not represent the spatial arrangement or temporal order of these elements, and these elements are not limited to these terms. The term "and / or" includes any and all combinations of one or more of the terms listed in the associated list. The terms "comprise," "include," "have," etc. refer to the presence of listed features, elements, elements, or components, but do not exclude the presence or addition of one or more other features, elements, elements, or components.

[0022] In the embodiments of the present invention, the singular forms "one," "the," etc., include the plural and should be understood broadly as "one kind" or "one class," and are not limited to "one." Furthermore, the term "said" should be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Furthermore, the term "described in" should be understood to mean "described at least in part," and the term "based on" should be understood to mean "based at least in part," unless the context clearly indicates otherwise.

[0023] In embodiments of the present invention, the terms "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as, for example, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0024] Additionally, communications between devices in a communications system may occur according to any stage of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G, New Radio (NR), and / or other currently known or future developed communications protocols.

[0025] In an embodiment of the present invention, the term "network device" refers to a device in a communication system that allows a terminal device to access the communication system and provides a service to the terminal device, and may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobility management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0026] Among them, the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., as well as a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may include some or all of these functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0027] In the embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives network services via, for example, a network device. The terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0028] Among them, the terminal device may include, but is not limited to, a mobile phone, a personal digital assistant (PDA), a wireless modulation / demodulation device, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless phone, a smartphone, a smart watch, a digital camera, etc.

[0029] For example, in a scenario such as the Internet of Things (IoT), the user equipment may be a monitoring or measuring device or apparatus, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0030] Furthermore, the term "network side" or "network device side" refers to the side of a network, which may be a base station or may include one or more of the network devices described above. The term "user side" or "terminal side" or "terminal device side" refers to the side of a user or terminal, which may be a UE or may include one or more of the terminal devices described above. In this specification, unless otherwise specified, "device" may refer to either a network device or a terminal device.

[0031] The following describes an example scenario of the present invention with reference to an example, but the present invention is not limited thereto.

[0032] 1 is a schematic diagram of a communication system according to an embodiment of the present invention, and schematically illustrates examples of user equipment and network equipment. As shown in FIG. 1, a communication system 100 may include a network equipment 101 and terminal equipments 102 and 103. For convenience of explanation, FIG. 1 illustrates an example in which two terminal equipments and one network equipment are included, but the embodiment of the present invention is not limited thereto.

[0033] In an embodiment of the present invention, existing services or future services can be performed between the network device 101 and the terminal devices 102 and 103. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC).

[0034] 1 shows that both of the two terminal devices 102 and 103 are located within the coverage area of ​​the network device 101, but the present invention is not limited to this. Neither of the two terminal devices 102 and 103 may be located within the coverage area of ​​the network device 101, or one terminal device 102 may be located within the coverage area of ​​the network device 101 and the other terminal device 103 may be located outside the coverage area of ​​the network device 101.

[0035] In an embodiment of the present invention, sidelink transmission may be performed between two terminal devices 102 and 103. For example, the two terminal devices 102 and 103 may both perform sidelink transmission within the coverage area of ​​the network device 101 to realize V2X communication, or may both perform sidelink transmission outside the coverage area of ​​the network device 101 to realize V2X communication, or one terminal device 102 may be located within the coverage area of ​​the network device 101 and the other terminal device 103 may be located outside the coverage area of ​​the network device 101 to realize V2X communication and perform sidelink transmission.

[0036] Although the embodiments of the present invention will be described taking sidelink and V2X as examples, the present invention is not limited thereto.

[0037] Example 1 An embodiment of the present invention provides a sidelink resource multiplexing method, which is described from the perspective of a second device, where the second device performs sidelink communication with a first device. The first device and / or the second device may be terminal devices, but the present invention is not limited thereto and may be, for example, roadside devices or network devices. The following description takes as an example a case in which the first device and the second device are both terminal devices.

[0038] 2 is a schematic diagram of a sidelink resource multiplexing method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:

[0039] Step 201: A second device receives length information transmitted by a terminal device or a network device, the length information indicating the length of a first portion of a slot.

[0040] Step 202: The second device transmits and / or receives sidelink information with the first device based on the length information.

[0041] In one embodiment, the second device may perform automatic gain control on the first portion based on the length information, although the present invention is not limited thereto and may, for example, perform other processing based on the length information.

[0042] It should be noted that the above FIG. 2 merely illustrates an example of the present invention, and the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above description of FIG. 2.

[0043] In one aspect, the length information may include at least one of a length of a physical sidelink feedback channel, a slot length corresponding to a numerology, and a length of a mini-slot, although the invention is not limited thereto.

[0044] In one aspect, the sidelink information may include information carried by at least one of a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a physical sidelink feedback channel (PSFCH).

[0045] In one aspect, one or more symbols before the first portion in the slot carry information for AGC, and one or more symbols before the first portion in the slot are guard intervals. The slot may further include at least a second portion, and one or more symbols before the second portion in the slot carry information for AGC and / or are guard intervals. For example, the first portion may be a PSFCH, and the second portion may be a PSCCH and / or a PSSCH.

[0046] FIG. 3 is a schematic diagram of sidelink resources in an embodiment of the present invention, illustrating an example in which PSCCH, PSSCH, and PSFCH are multiplexed in one slot. This multiplexing scheme helps meet low-latency service requirements. For example, UE1 may receive PSCCH and PSSCH from UE2 in this slot and transmit HARQ feedback information to UE2 via PSFCH in the same slot. Because PSCCH and PSSCH are transmitted from UE2 and PSFCH is transmitted from UE1, AGC estimation must be performed separately.

[0047] For example, as shown in Figure 3, the AGC 1 symbol is used for AGC estimation of the PSCCH and PSSCH, and the AGC 2 symbol is used for AGC estimation of the PSFCH. The GUARD 2 symbol is used as a guard interval for transmission / reception conversion between the PSCCH / PSSCH and the PSFCH, and the GUARD 1 symbol is used as a guard interval for transmission / reception conversion between slots. The AGC and GUARD in Figure 3 are located in different symbols. The slot structure shown in Figure 3 is not limited to scenarios that support devices receiving data information and transmitting HARQ feedback information in the same slot.

[0048] For example, in a specific slot, UE1 only needs to send feedback information to UE2 via PSFCH, and UE3 only needs to send data information to UE4 via PSCCH / PSSCH. In this case, UE1 and UE3 may multiplex PSFCH and PSCCH / PSSCH according to the scheme of FIG. 3.

[0049] In another example, in a specific slot, UE5 needs to transmit data information to UE6 and feedback information to UE7. In this case, the PSCCH / PSSCH and PSFCH transmitted to UE6 and UE7 may be multiplexed within one slot according to the scheme of Figure 3. Therefore, the PSCCH, PSSCH and PSFCH transmitted from different devices or different devices can be multiplexed within the same slot, thereby improving spectrum utilization.

[0050] With the improvement of device processing capability, it is also possible to complete the receive / transmit conversion and AGC estimation within one symbol, that is, the GUARD and AGC in FIG. 3 may be located within one symbol.

[0051] 4 is another schematic diagram of sidelink resources according to an embodiment of the present invention, illustrating an example of the following scenario: GUARD 1 and AGC 1 are located within the first symbol of a slot, and within one symbol, they can complete not only the receive / transmit conversion between slots but also the AGC estimation of the PSCCH and PSSCH. GUARD 2 and AGC 2 are located within one symbol before the PSFCH, and within one symbol, they can complete the receive / transmit conversion between PSCCH / PSSCH and PSFCH and the AGC estimation of the PSFCH.

[0052] For simplicity, Figures 3 and 4 may be combined and abstracted.

[0053] Figure 5 is another schematic diagram of sidelink resources according to an embodiment of the present invention, where AGC symbols and guard intervals are omitted. In practice, the AGC and GUARD structure in Figure 5 can use either Figure 3 or Figure 4. Furthermore, Figure 5 is not limited to the relative positions in frequency of the PSCCH / PSSCH and the PSFCH, i.e., the PSCCH / PSSCH and the PSFCH may completely overlap, partially overlap, or not completely overlap in frequency.

[0054] Figure 6 is another schematic diagram of sidelink resources according to an embodiment of the present invention, illustrating a situation where the PSCCH / PSSCH and the PSFCH completely overlap in frequency. Figure 7 is another schematic diagram of sidelink resources according to an embodiment of the present invention, illustrating a situation where the PSCCH / PSSCH and the PSFCH partially overlap in frequency. Figure 8 is another schematic diagram of sidelink resources according to an embodiment of the present invention, illustrating a situation where the PSCCH / PSSCH and the PSFCH do not completely overlap in frequency.

[0055] In NR Rel-15, feedback information of the Uu port is transmitted to a network device (e.g., a base station) via a physical uplink control channel (PUCCH), and the number of symbols used by the PUCCH (i.e., the length of the PUCCH) is variable. For example, the terminal device can flexibly select an appropriate PUCCH length according to the load status of the feedback information.

[0056] As used herein, "length" generally refers to a length of time, and may be measured, for example, in terms of the number of symbols. Embodiments of the present invention may use waveforms such as Orthogonal Frequency Division Multiplexing (OFDM), Single-Carrier Frequency Division Multiple Access (SC-FDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM). Therefore, the symbols may be OFDM symbols, SC-FDMA symbols, DFT-s-OFDM symbols, or the like, and will be referred to as symbols hereinafter, although the present invention is not limited thereto.

[0057] In NR V2X, following the concept of PUCCH, allowing flexible selection of the number of symbols used in the PSFCH (i.e., the length of the PSFCH) leads to the problem of inaccurate AGC estimation. More specifically, flexible PSFCH lengths mean that different devices can use different PSFCH lengths. These different PSFCH lengths cause the signal and / or interference strength of other devices receiving data to vary within a slot. Since the receiving device does not have the ability to grasp global information like the base station and does not know the information of other multiplexed devices, the receiving device cannot accurately estimate the AGC, resulting in reduced reliability of information transmission.

[0058] For NR Rel-15, the terminal only needs to know its own PUCCH length information. For NR V2X, the terminal needs to know the PSFCH length of other terminals. This is explained below by analyzing the impact of changes in interference on AGC.

[0059] FIG. 9 is a schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in FIG. 9, for example, UE1 transmits PSCCH1 and PSSCH1 to UE2, and UE2 transmits HARQ-ACK feedback information to UE1 via PSFCH2 in the same slot. Because V2X devices can multiplex within a group of overlapping time-frequency resources (sharing the same group of time-frequency resources or implementing frequency reuse), UE3 may transmit PSCCH3 and PSSCH3 to UE4 within the same time-frequency resources as UE1 and UE2. For example, UE3 may determine through sensing that it can transmit information using the entire slot. There is no need to exchange feedback information between UE3 and UE4, i.e., PSFCH may not exist. As a receiving device, UE4 is interfered with by PSCCH1 / PSSCH1 transmitted by UE1 in part 1 of slot k and by PSFCH2 transmitted by UE2 in part 2 of slot k. The interference experienced by these two parts is independent of each other, and the strength of the interference may be significantly different.

[0060] For example, UE1 to UE4 are traveling in the same direction in one lane, and UE2 is close to UE4, so part 2 of UE4 will be subject to strong interference, while part 1 of UE4 will be less subject to interference because UE2 is blocking the path between UE1 and UE4. UE3 performs sensing before transmitting information, but because it is far away from UE4, it may not be able to accurately sense the interference environment in which UE4 is located, i.e., the hidden node problem. Alternatively, UE3 may determine through sensing that a slot is available at the start of the slot, but may not be able to predict that strong interference will occur in part 2 of the slot, so UE3 may transmit information in this slot.

[0061] If the conventional method is used to estimate the AGC based on the first symbol of a slot and then apply the result to the entire slot, in the above situation, the conventional method will result in an inaccurate AGC estimation for part 2, leading to failure of data demodulation for the entire slot.

[0062] To solve this problem, UE4 needs to perform AGC estimation separately for part 1 and part 2. UE4 itself may not need to send feedback information, i.e., it does not need to know PSFCH resource configuration information such as PSFCH length, but UE4 needs to know at least the PSFCH length information of other interfering devices so that it can perform AGC estimation separately for part 1 and part 2 in a slot.

[0063] Fig. 10 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in Fig. 10, UE3 transmits PSCCH3 and PSSCH3 to UE4 using the entire slot. Different devices can multiplex on overlapping groups of time-frequency resources, so that other UEs can transmit and receive data within the same time-frequency resource range (RBm to RBn, slot k).

[0064] For example, UE2 transmits feedback information such as HARQ feedback and / or CSI via PSFCH2 in RBm-RBn and in part 2 of slot k. UE1 can detect or demodulate sidelink control information (SCI) to know that there is a PSFCH transmitted in RBm-RBn in the frequency domain and in part 2 of slot k in the time domain, and therefore UE1 may transmit PSCCH1 and PSSCH1 in part 1 of slot k.

[0065] In the reception of UE4, interference occurs from different devices, UE1 and UE2, in part 1 and part 2 of slot k, respectively, so AGC estimation needs to be performed separately for part 1 and part 2. UE4 itself does not need to send feedback information, but UE4 needs to know at least the PSFCH length information of other devices that may cause interference to itself so that it can perform independent AGC estimation for part 1 and part 2 in the slot.

[0066] 11 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in Fig. 11, UE1 transmits PSCCH1 and PSSCH2 to UE2 using the entire slot, and multiplexes them in a group of overlapping time-frequency resources within a group of V2X devices performing groupcast communication, i.e., RBm to RBn. UE3 transmits information to a group of devices UE4 to UEN in a groupcast manner.

[0067] For groupcast HARQ feedback, multiple devices using the same PSFCH resource to transmit HARQ feedback information is a resource-efficient method. This avoids the need to allocate a dedicated PSFCH resource to each device, significantly saving feedback resource overhead and allowing devices to only feedback NACKs without feedbacking ACKs. When multiple devices use the same resource to transmit NACKs, the superimposed signals create a signal-boosting effect, which helps ensure reliable reception of the feedback information.

[0068] However, while the above method strengthens the feedback signal, it also strengthens interference to other devices. For example, as shown in Figure 11, UEs 4 through N receive groupcast data in a specific slot before slot k and send a NACK in part 2 of slot k. The superposition of multiple UE signals generates greater interference to part 2 of slot k for UE 2, so the interference strength of parts 1 and 2 of UE 2 varies significantly, and parts 1 and 2 must perform AGC estimation separately.

[0069] Here, UE1 may not be able to know the existence of groupcast feedback by blindly detecting the SCI of UE3, or by sensing or other methods due to hidden nodes, etc. Therefore, it cannot avoid scheduling UE2 on the same time-frequency resource to receive data. Although UE2 itself does not need to transmit feedback information, UE2 needs to know at least the PSFCH length information of other devices that may cause interference to itself so that it can perform independent AGC estimation for Part 1 and Part 2 within the slot.

[0070] As mentioned above, a receiving device needs to know at least the PSFCH length information of other devices. Because multiple devices may be multiplexed with a specific receiving device in overlapping time-frequency resources of one group, knowing the PSFCH information of multiple devices results in larger signaling overhead. Furthermore, flexible selection of PSFCH lengths by multiple devices also increases the AGC symbol overhead and / or AGC estimation complexity of the receiving device.

[0071] Fig. 12 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in Fig. 12, if multiple devices (e.g., UE1, UE2) have different PSFCH lengths, multiple portion lengths (e.g., Part 2, Part 2') will be formed at a particular receiving device (UE4), and UE4 will experience different degrees of interference in the slot (in Fig. 12, Part 1', Part 2, and the rest of the slot will experience different interference), requiring multiple independent AGC estimations, which will require larger AGC symbol overhead and / or higher AGC estimation complexity.

[0072] 9 to 12 are shown only as an example. For simplicity, FIGS. 9 to 12 assume that the number of resource blocks (RBs) occupied by the PSCCH / PSSCH interfered by the PSFCH is the same as the number of RB resource blocks occupied by the PSFCH, which is the interference source. In practice, the numbers of RBs may differ. As long as there are overlapping RBs in the frequency domain, the above interference analysis and its impact on AGC still hold, and its description will be omitted here.

[0073] For simplicity, FIGS. 9 to 12 may be combined and abstracted.

[0074] FIG. 13 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in FIG. 13, when a specific device receives PSCCH1 and PSSCH1 in a specific slot, there may be information transmission / reception between other devices in time-frequency resources that overlap (but do not necessarily completely overlap) with those of the PSCCH1 and PSSCH1. For example, information transmitted by physical channels such as PSCCH2 / PSSCH2, PSFCH3, PSCCH4 / PSSCH4, and PSFCH5 may be obtained from various devices. Because the interference of PSCCH1 / PSSCH1 in a slot varies, the conventional method of performing AGC estimation based only on the first symbol in the slot is no longer applicable, and the receiving device of PSCCH1 / PSSCH1 must perform AGC estimation multiple times in one slot.

[0075] 14 is another schematic diagram of sidelink resources according to an embodiment of the present invention. For example, as shown in FIG. 14, PSSCH uses more RBs to transmit larger-sized transport blocks (TBs), but suffers from strong narrowband interference from PSFCH in part 2 of the slot. If AGC is estimated based only on the first symbol of the slot, the performance of PSSCH demodulation and decoding in part 2 will be affected, and therefore the performance of TB demodulation and decoding in the entire slot will be affected.

[0076] Variation in interference across slots is one reason that leads to multiple AGC estimations, another reason can be variation in signal energy (or power).

[0077] 15 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention. As shown in Fig. 15, the physical channels or signals of PSCCH1 / PSSCH1 and other devices (such as PSCCH2 / PSSCH2, PSFCH3, PSCCH4 / PSSCH4, PSFCH5, etc., the number of RBs occupied by these physical channels may vary) are multiplexed in the frequency domain using a frequency division multiplexing scheme, and these physical channels are all within the reception frequency range of the PSCCH1 / PSSCH1 receiving device (e.g., within the BWP of the receiving device).

[0078] The signal energy received by the receiving device in a slot is the sum of the energies of all physical channels and / or signals in the frequency division multiplexing. Because there are signals from various devices within a slot, the energy of the time-domain signal received by the PSCCH1 / PSSCH1 receiving device varies within the slot. Therefore, the conventional method of estimating AGC based on the first symbol within a slot is no longer applicable, and the PSCCH1 / PSSCH1 receiving device must perform AGC estimation multiple times within one slot. The scenarios in Figures 9 to 12 can be easily extended to the frequency division multiplexing scenario shown in Figure 15 to illustrate the variation of signal energy within a slot, but this description is omitted here.

[0079] Based on the above analysis, even if a device only needs to receive the PSCCH and PSSCH as in LTE V2X, or even if the device itself does not need to transmit information using the PSFCH, NR V2X introduces the PSFCH, and considering the impact of the PSFCH on AGC described above, the device must perform AGC estimation multiple times in one slot. To perform multiple AGC estimations, the device must know the PSFCH length information of other devices. To avoid performing too many AGC estimations, other devices may be restricted to have the same PSFCH length. When this condition is met, the device can perform AGC estimation a maximum of two times in a slot.

[0080] In one aspect, if there are at least two lengths of the first portions within a time range that overlaps in time with the slot, the lengths of the at least two first portions are configured to be the same.

[0081] For example, for devices using the same time-frequency resource (e.g., fractional bandwidth BWP, resource pool, carrier, etc.), when PSFCH needs to be transmitted, the PSFCHs of these devices may be restricted to have the same PSFCH length. In this way, the receiving device can perform AGC estimation at a position determined according to the length of the PSFCH, and can perform AGC estimation a maximum of two times in one slot.

[0082] In one aspect, the length information may be comprised of at least one of Radio Resource Control (RRC) signaling, System Information (SI), Sidelink Control Information (SCI), and Downlink Control Information (DCI).

[0083] For example, the SCI may be used to signal the length of the PSFCH, the cyclic redundancy check code (CRC) of the SCI may be scrambled using a common identifier, and the SCI may indicate at least one of the length of the PSFCH, the slot in which the PSFCH is located, the symbol in which the PSFCH is located, the resource block in which the PSFCH is located, the slot in which the PSSCH is located, the symbol in which the PSSCH is located, and the resource block in which the PSSCH is located.

[0084] For example, UE1 transmits an SCI to UE2, and the CRC of the SCI is scrambled with a common identifier (e.g., a common ID or a common RNTI), where the common identifier may be a group-common ID or an RNTI. The SCI indicates a slot in which UE2 transmits information such as HARQ feedback or CSI, and one field of the SCI is used to indicate the length of the PSFCH. In a specific aspect, several available PSFCH lengths may be configured using higher layer signaling (e.g., RRC signaling), and the SCI indicates the PSFCH length actually used, so that UE2 can know the number of slots and symbols used to transmit the PSFCH.

[0085] As described above, the length of the PSFCH may be directly indicated in the SCI, or the length of the PSFCH may be indicated by the PSFCH time-frequency resource. For example, the SCI indicates the slot, symbol, and RB in which the PSFCH is located, so that UE2 can obtain the PSFCH length information from it. Furthermore, since the CRC of the above-mentioned SCI is scrambled with a common identifier, other devices besides UE2 can also demodulate the SCI to obtain the length of the PSFCH and information on the slot in which the PSFCH is located, and perform additional AGC estimation on the slot in which the PSFCH appears based on the information.

[0086] Consider the following scenario: where the PSFCH transmitted by UE2 is multiplexed with the PSSCH received by UE3, thereby affecting the AGC of UE3, but because UE3 can demodulate the above SCI carrying the PSFCH information, UE3 can also obtain the PSFCH length information, and UE3 can perform additional AGC estimation based on the PSFCH length information.

[0087] Indicating the length of the PSFCH via the SCI is also flexible enough to configure multiple PSFCHs transmitted in the same slot to be the same length. For example, SCI1 transmitted from UE1 to UE2 may instruct UE2 to transmit PSFCH1 in slot k, and SCI2 transmitted from UE3 to UE4 may instruct UE4 to transmit PSFCH2 in slot k. In this case, SCI1 and SCI2 may indicate the same PSFCH length. For UE5 multiplexed with PSFCH1 and PSFCH2 in slot k, performing too many AGC estimations can be avoided when receiving the multiplexed PSFCHs. In this example, UE5 only needs to perform AGC estimation twice.

[0088] For example, this method may be used in a two-stage SCI. The two-stage SCI divides the information carried by one SCI initially transmitted to UE1 into two parts carried by two SCIs. For example, SCI1 may carry not only any of the above information used to indicate the length of the PSFCH, but also time-frequency resource information (e.g., the slot, symbol, RB, etc.) where the PSSCH is located. The CRC of SCI1 is scrambled using a common identifier. SCI2 carries information used for demodulation and decoding, such as MCS, and the CRC of SCI2 is scrambled using a UE-specific identifier (e.g., C-RNTI).

[0089] Since SCI1 is scrambled using a common identifier, UE2 can receive SCI1, which allows UE2 to avoid the PSFCH and / or PSSCH resources indicated by SCI1 and avoid interference. UE1 can receive and demodulate complete data information by receiving two SCIs. Since information such as the length of the PSFCH and the slot in which the PSFCH is located is carried in SCI1, when UE2 receives SCI1, it can also perform additional AGC estimation on the slot in which the PSFCH is located based on the length information of the PSFCH.

[0090] For example, the above length information may be carried in resource reservation signaling. SCI1 is used as resource reservation signaling to indicate that specific time-frequency resources are reserved for PSCCH2 and / or PSSCH2 transmission. Furthermore, SCI1 may indicate PSFCH length information in any of the above formats. Since the CRC of SCI1 is scrambled using a common identifier, SCI1 can be received by multiple UEs. These UEs can avoid transmitting on the resources reserved by SCI1 and can also perform more accurate AGC estimation based on the PSFCH length indicated by SCI1. Preferably, PSCCH2 may also carry SCI2. SCI2 is used for scheduling PSSCH2, and can use the same format as a normal SCI, indicating information such as the time-frequency resource and MCS where PSSCH2 is located. The CRC of SCI2 may be scrambled using a device-specific identifier so that UEs receiving PSCCH2 and PSSCH2 can correctly receive control information and data information.

[0091] In one aspect, the length information is configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0092] In one aspect, the time-frequency resources may be configured by at least one of Radio Resource Control (RRC) signaling, system information, sidelink control information, and downlink control information. The time-frequency resources may include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier.

[0093] For example, one PSFCH length may be configured or pre-configured for each resource pool. A resource pool may be configured for each device, and multiple resource pools may be configured for one device. Therefore, "configured or pre-configured for each resource pool" in the present invention is actually a simple way of saying "configured or pre-configured for each resource pool for each device." A resource pool consists of one or more slots in the time domain and one or more RBs in the frequency domain. A resource pool may be a transmission resource pool or a reception resource pool. For convenience of explanation, it will be abbreviated as a resource pool hereinafter. Since NR V2X configures one or more resource pools for data transmission and reception for a device, the PSFCH length may be configured in units of the above resource pools. Alternatively, when configuring a specific PSFCH length, an existing resource pool associated with that PSFCH length is specified.

[0094] Configuring or pre-configuring the length of the PSFCH for a particular resource pool has two implications:

[0095] Assuming that the device does not need to transmit or receive a PSFCH in the first resource pool (e.g., the first resource pool is only used for broadcast services, and the broadcast services do not need a PSFCH), the length of the PSFCH in the first resource pool refers to the length of the PSFCH from other resource pools that affects the AGC of the first resource pool, and when the device receives in the first resource pool, it may perform additional AGC estimation based on the length of the PSFCH in the first resource pool.

[0096] Assume that a device needs to transmit and receive a PSFCH in a first resource pool (e.g., the first resource pool is used for unicast services, and in slots where a PSFCH is present, a PSSCH can be multiplexed with the PSFCH in one of the above-described ways, and in slots where a PSFCH is not present, the entire slot can be used for transmitting and receiving the PSFCH). In this case, the length of the PSFCH in the first resource pool refers to the length of the PSFCH required for the device to transmit and receive the PSFCH in the first resource pool, and refers to the lengths of the PSFCHs from other resource pools that affect the AGC of the first resource pool. When receiving in the first resource pool, the device does not necessarily need to receive the PSFCH in all slots. The device realizes reception of the PSFCH based on the length of the PSFCH in the first resource pool in slots where it needs to receive the PSFCH. The device may perform additional AGC estimation based on the length of the PSFCH in the first resource pool in slots where it does not need to receive the PSFCH but needs to receive the PSSCH.

[0097] The configuration of the PSFCH length for a resource pool includes reconfiguring the PSFCH length as needed, for example, if a longer PSFCH length is needed for a particular resource pool, a new PSFCH length may be reconfigured for that resource pool via RRC signaling.

[0098] The definition and configuration method of the resource pool may follow the definition and configuration method of the LTE V2X resource pool. For details, see Section 14.1.5 of TS 36.213, replacing "subframe" with "slot." Here, "configuration" may apply to a scenario in which the device is in network coverage of the network, and the device may receive at least one of network configuration information, such as system information (MIB / SIB), RRC signaling, DCI signaling, and SCI signaling. "Pre-configuration" may apply to a scenario in which the device is out of network coverage, and the device performs V2X communication according to pre-configuration (i.e., default, factory, or standard configuration). For convenience of explanation, the term "configuration" will be used hereinafter, and the term "configuration" includes the above two aspects, "configuration" and "pre-configuration."

[0099] In a particular resource pool, the length of the PSFCH may not be configured or may be configured to be zero, which means that the influence of the PSFCH does not need to be considered for AGC estimation in the resource pool. Since a device may be configured with multiple resource pools, time-frequency resources of some resource pools may be used for multiplexing with other devices, for example, the above devices may be multiplexed within a group of overlapping time-frequency resources or may perform frequency division multiplexing between devices. For convenience of explanation, this may hereinafter be collectively referred to as "multiplexing."

[0100] For example, if a particular resource pool of UE1 does not multiplex other devices that need to use the PSFCH, UE1 does not need to consider the effect of the PSFCH in its AGC estimation. That is, LTE V2X principles may be followed and AGC estimation may be performed based only on the first symbol of a slot. Alternatively, even if a particular resource pool of UE1 multiplexes other devices that need to use the PSFCH, if the base station or other device determines that the effect of the PSFCH on the resource pool can be ignored, for example, if the power of the PSFCH is much smaller than the effective signal power of UE1, the base station may not configure the PSFCH length or may configure the PSFCH length to zero. Otherwise, if a particular resource pool of UE1 multiplexes other devices that need to use the PSFCH, UE1 needs to consider the effect of the PSFCH on the AGC. For example, AGC may be estimated based on the configured PSFCH length of the resource pool.

[0101] Configuring the PSFCH length according to the resource pool provides configuration flexibility. For example, the resource pools of all other devices multiplexed with UE1 can be configured to have the same PSFCH length, allowing UE1 to perform AGC estimation at most twice in one slot. For example, different resource pools can have different PSFCH lengths, supporting different feedback overheads. For example, multiple resource pools belonging to the same device can be configured to have the same PSFCH length, allowing the device to receive information from multiple resource pools and perform AGC estimation at most twice in the same slot.

[0102] 16 is a schematic diagram of a resource pool configuration according to an embodiment of the present invention. For example, as shown in FIG. 16, resource pool i and resource pool j belong to UE1 and coexist in the BWP of UE1 in a time division multiplexing manner. In this BWP, if resource pool j is not multiplexed with a PSFCH or if interference or signal changes caused by the PSFCH can be ignored, the length of the PSFCH in resource pool j may be configured to be zero, or the length of the PSFCH may not be configured in resource pool j. That is, resource pool j does not need to consider the impact of the PSFCH on AGC. In this BWP, if resource pool i is multiplexed with a PSFCH or the first device needs to transmit and receive feedback information via the PSFCH in resource pool i, an appropriate PSFCH length may be configured in resource pool i, and the impact of the PSFCH on AGC in resource pool i needs to be considered.

[0103] 17 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention, illustrating an example of multiplexing resource pools of different devices within a BWP. For a specific resource pool l belonging to UE2, if the resource pool forms frequency division multiplexing with resource pool i of UE1 (or overlaps with resource pool i in time-frequency resources), the PSFCH length of resource pool l may be configured to be the same as the PSFCH length of resource pool i. By making the PSFCH lengths the same, the number of AGC estimation times for UE1 in the slots of resource pool i can be reduced to a maximum of two. Similarly, since resource pool r of UE3 forms frequency division multiplexing with resource pool i and resource pool l, the PSFCH lengths of resource pools r, i, and l are configured to be the same.

[0104] The resource pool configurations of different devices shown in FIG. 17 may include at least the following situations:

[0105] For example, in one scenario, resource pools i, j, r, and l are all configured for UE1, UE2, and UE3. That is, three UEs share these four resource pools. Assume that in a particular slot, only resource pool i contains information transmitted to UE1, and only resource pool l contains the PSFCH transmitted by UE2. Because both are located in UE1's BWP, UE1's AGC estimation upon reception is affected by UE2's PSFCH.

[0106] For example, in one situation, only resource pools i and j are configured for UE1, and resource pools l and r are configured for UE2 and UE3, respectively. This is because the number of resource pools for a UE is configurable. For example, up to four resource pools, including i, j, r, and l, may be configured in UE1's BWP, but currently UE1 is configured with only two resource pools, i.e., resource pools i and j. Resource pools l and r, which are not used by UE1, are configured for use by UE2, UE3, and other devices. Although resource pools l and r are not configured for UE1, resource pools l and r are still located in UE1's BWP, so UE1's AGC estimation upon reception is still affected by the PSFCHs from resource pools l and r.

[0107] 18 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. For example, as shown in FIG. 18, resource pool i and resource pool j belonging to UE1 coexist in UE1's BWP in a frequency division multiplexing manner. Assuming that both resource pools i and j require PSFCH length configuration, configuring resource pool i and resource pool j to have the same PSFCH length can reduce the number of AGC estimations by UE1 in the slots of resource pool i to a maximum of two. For resource pool l, if resource pool l forms frequency division multiplexing with resource pools i and j or overlaps with resource pools i and j in the time-frequency resource, the PSFCH length of resource pool l may be configured to be the same as that of resource pools i and j.

[0108] In the above-described PSFCH length configuration, the PSFCH length may be one of the parameters of a resource pool. For example, the PSFCH length may be configured together with parameters such as the time domain and frequency domain locations of the resource pool when the resource pool is configured. Alternatively, the PSFCH length may be configured independently of the resource pool, and an association and correspondence between the PSFCH length and the resource pool is established by indicating the resource pool to which the PSFCH length applies. In the above-described configuration, specific aspects may include at least one of system information (MIB / SIB), RRC signaling, DCI signaling, SCI signaling, and pre-configuration. Each resource pool may be configured individually or may be associated with a PSFCH length, and each resource pool may have one PSFCH length.

[0109] Figure 19 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention, in which, compared with Figure 13, the PSFCH lengths of different resource pools of different devices overlapping in time-frequency resources are all the same. Figure 20 is another schematic diagram of sidelink resource multiplexing by multiple devices according to an embodiment of the present invention, in which, compared with Figure 15, the PSFCH lengths of different resource pools of different devices overlapping in frequency division multiplexing are all the same.

[0110] For example, the PSFCH length for each resource pool may be semi-statically configured using RRC signaling and / or system information, or may be dynamically configured using SCI signaling and / or DCI signaling, where the dynamically configured PSFCH length may override the semi-statically configured PSFCH length, i.e., if there is a mismatch, the dynamically configured PSFCH length takes precedence.

[0111] For example, a first PSFCH length is configured for a resource pool via RRC signaling, but SCI signaling indicates that a second PSFCH length is present in a slot. In this case, the PSFCH length in the slot is the second PSFCH length. That is, the SCI instruction takes precedence. Semi-static configuration allows for easy adjustment of multiple PSFCH lengths within a slot. Dynamic configuration allows for more flexible and accurate adjustment of the PSFCH length according to load or coverage requirements. The combination of these two methods can more efficiently support PSFCH multiplexing.

[0112] As another example, the PSFCH length may be configured or pre-configured for a group of time-frequency resources. The difference from the above configuration of the PSFCH in units of resource pools is that the group of time-frequency resources here is configured independently of the existing transmission / reception resource pool. The specific method for configuring the group of time-frequency resources may be the same as the resource pool configuration method, for example, according to the method described in Section 14.1.5 of TS 36.213, where "subframe" may be replaced with "slot." The scope of action of the PSFCH length is the group of time-frequency resources associated with it. Because the group of time-frequency resources is configured independently of the resource pool, this group of time-frequency resources may be different from or the same as the existing resource pool.

[0113] As another example, each BWP may be configured or pre-configured with a PSFCH length, and each BWP has one PSFCH length. As another example, each carrier or component carrier may be configured or pre-configured with a PSFCH length, and each carrier has one PSFCH length.

[0114] In another example, the length information is predefined, for example, the standard specifies the PSFCH length and the PSFCH has a fixed length.

[0115] The above PSFCH length configuration with the granularity of BWP or carrier can be easily extended from the PSFCH length configuration of the resource pool. For example, the PSFCH length of a BWP or carrier may not be configured or may be configured to zero. The PSFCH length may be configured as one of the parameters of the BWP or carrier, or may be configured individually, but the description thereof is omitted here.

[0116] The above explains the need to indicate the length of the PSFCH from the viewpoint of the influence of the PSFCH on AGC. In practice, the indicated length information is not limited to the PSFCH length and may be extended to other scenarios.

[0117] FIG. 21 is another schematic diagram of sidelink resources according to an embodiment of the present invention. For example, as shown in FIG. 21, UE1 using numerology 1 and UE2 using numerology 2 are frequency-division multiplexed, or UE1 is subject to interference from UE2. Because different numerologies have different subcarrier spacings, the slot lengths are also different. Because information may not be transmitted simultaneously in the two slots (slot1 and slot2) of UE2, or because different devices transmit in slot1 and slot2, respectively, the received power of UE1 in one slot may also vary. Therefore, multiple AGC estimations are required. In the case of FIG. 21, the slot length of numerology 2 may be notified to UE1 as a single length information. This allows UE1 to perform more accurate AGC estimation.

[0118] Figure 22 is another schematic diagram of sidelink resources according to an embodiment of the present invention. For example, as shown in Figure 22, UE1 and UE2 use the same numerology, but UE2 transmits using a minislot (also called a small slot, mini-slot, or non-slot). Because the granularity of information transmission in the time domain is different, the same results as in Figure 21 occur. In the case of Figure 22, the length of a minislot may be notified to UE1 as a single length information, allowing UE1 to perform more accurate AGC estimation.

[0119] 21 and 22 are described merely as examples. The slot lengths of different numerologies may have various other multiple relationships, and the lengths of slots and minislots may have various other multiple relationships, but the description thereof will be omitted here. Also, a combination of FIG. 21 and FIG. 22 may be extended. For example, UE2 may use a different numerology from UE1 and may use minislots at the same time. The length information may be configured using any method for configuring the PSFCH length as described above, and the description thereof will be omitted here.

[0120] The above aspects are merely examples of the present invention, and the present invention is not limited thereto. Appropriate modifications can be made based on the above aspects. For example, each of the above aspects may be used alone, or one or more of the above aspects may be used in combination.

[0121] In this embodiment, the second device receives length information transmitted by the terminal device or the network device, indicating the length of the first portion of the slot, and transmits and / or receives sidelink information with the first device based on the length information, thereby enabling the second device to process the first portion based on the length information, thereby improving the performance of sidelink transmission (e.g., improving the accuracy of AGC estimation).

[0122] <Example 2> The embodiments of the present invention provide a sidelink resource multiplexing method. The embodiment 2 may be implemented independently or in combination with the embodiment 1. The description of the same contents of the embodiment 2 as those of the embodiment 1 will be omitted.

[0123] In this embodiment, the second device transmits and / or receives sidelink information to the first device in a slot, the slot including at least a first portion and a second portion, the first portion of the slot configuring a first demodulation reference signal, and the second portion of the slot configuring a second demodulation reference signal.

[0124] From Example 1, it can be seen that the impact of the PSFCH on the PSSCH multiplexed with it is shown. Figure 23 is another schematic diagram of sidelink resources according to an embodiment of the present invention, and Figure 24 is another schematic diagram of sidelink resources according to an embodiment of the present invention, illustrating the impact of two types of PSFCH slot structures on the PSSCH. As shown in Figures 23 and 24, the PSSCH at the end of the slot is multiplexed with the PSFCH. As mentioned above, this multiplexing may be frequency division multiplexing or multiplexing in a group of overlapping time division resources, so the PSSCH is interfered with by the PSFCH.

[0125] Due to the multiplexing of PSFCH, the AGC needs to be estimated separately for the PSSCH at the end of the slot and the PSSCH at the beginning of the slot. Therefore, even if the PSSCH is transmitted in one slot, the PSSCH at the beginning and the PSSCH at the end of the slot need to be independent AGC estimation symbols. For example, the AGC2 symbol before the PSSCH at the end of the slot in Figure 23 and the GUARD2&AGC2 symbol before the PSSCH at the end of the slot in Figure 24 may be used as the AGC estimation symbol for the PSSCH.

[0126] If the NR Rel-15 DM-RS location configuration method is used as is, the PSSCH is transmitted using the entire slot, so the location of the DM-RS used for PSSCH demodulation depends on the length of the entire slot. For specific DM-RS locations, see Section 6.4.1.1 of Standard TS 38.211 f30. However, in a DM-RS configuration that reuses NR, collisions between DM-RS symbols and AGC symbols may occur. That is, a specific DM-RS symbol is placed in the AGC symbol position of the rear PSSCH. For example, the DM-RS is placed in the AGC2 symbol in Figure 23 or the GUARD2&AGC2 symbol in Figure 24. Considering that the length of the PSFCH may also be configurable or variable, collisions between the DM-RS symbol and the AGC symbol are likely to occur. Because the AGC symbol cannot be used for demodulation, the DM-RS placed in the AGC symbol position cannot be used, resulting in poor channel estimation performance.

[0127] To solve this problem, when the PSSCH is transmitted over the entire slot, the DM-RS positions are not determined based on the length of the entire slot, but the positions of the DM-RSs in the front and rear parts are determined separately based on the lengths of the symbols occupied by the front and rear PSSCHs in the slot (excluding the guard interval and AGC symbols). In other words, the DM-RSs are configured separately for the front and rear PSSCHs.

[0128] For example, as shown in Figures 23 and 24, two independent DM-RS configurations, namely DM-RS configuration #1 and DM-RS configuration #2, are used in one slot. DM-RS configuration #1 is used to determine the DM-RS symbol position of the front PSSCH, which depends on the number of symbols occupied by the front PSSCH (excluding the guard interval and AGC symbols). DM-RS configuration #2 is used to determine the DM-RS symbol position of the rear PSSCH, which depends on the number of symbols occupied by the rear PSSCH (excluding the guard interval and AGC symbols). Regardless of whether one or two DM-RS configurations are used, there is no limitation on the specific method of configuring the DM-RS positions. For example, the method described in Section 6.4.1.1 of TS 38.211 f30 may be used. In other words, DM-RS symbols are not placed in the guard interval and AGC symbol positions within a slot.

[0129] In one aspect, the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0130] In one aspect, the time-frequency resources are configured by at least one of Radio Resource Control (RRC) signaling, System Information (SI), Sidelink Control Information (SCI), and Downlink Control Information (DCI). The time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier.

[0131] Regarding DM-RS locations, the use of one type of DM-RS configuration in one slot and the use of multiple types of DM-RS configurations in one slot can coexist. For example, in a resource pool where the PSFCH length is configured and the PSFCH length is non-zero, the resource pool may use multiple independent DM-RS configurations in a slot, as shown in Figure 23 or 24. In a resource pool where the PSFCH length is not configured or the PSFCH length is zero, the resource pool may use one type of DM-RS configuration in one slot, for example, by directly using the DM-RS configuration method of NR Rel-15.

[0132] 25 is a schematic diagram of another resource pool configuration according to an embodiment of the present invention. As shown in FIG. 25, two independent DM-RS configurations may be configured for resource pool i, and one DM-RS configuration may be configured for resource pool j. Configuring two independent DM-RSs can improve the accuracy of sidelink channel estimation.

[0133] Example 3 The embodiments of the present invention provide a sidelink resource multiplexing method. The embodiment 3 may be implemented alone, or may be implemented in combination with the embodiment 1, the embodiment 2, or both the embodiment 1 and the embodiment 2. The description of the same contents of the embodiment 3 as those of the embodiments 1 and 2 will be omitted.

[0134] In this embodiment, the second device transmits and / or receives sidelink information with the first device in a slot, where if at least two transmission power levels are required for the slot, the maximum transmission power level among the at least two transmission power levels is used as the transmission power level for the slot.

[0135] 26 is another schematic diagram of a resource pool configuration according to an embodiment of the present invention. As shown in FIG. 26, for example, UE1 may transmit PSCCH and PSSCH to UE2 in a specific slot, and transmit feedback information to UE3 via PSFCH in the same slot. That is, UE1 supports two unicast sessions with UE2 and UE3.

[0136] Power control is very important for unicast, which can meet the needs of its own service and avoid interfering with other devices. However, because the target devices of PSCCH / PSSCH and PSFCH in the same slot are different, for example, the distance between UE1 and UE2 is much smaller than the distance between UE1 and UE3, the transmit power determined by power control may be different.

[0137] For example, as shown in Figure 26, the transmission power of the PSCCH / PSSCH is Pm, and the transmission power of the PSFCH is Pn. The specific process for determining the final transmission power through power control may refer to Section 7 of TS 38.213, and the description thereof will be omitted here. Therefore, UE1 needs to perform power adjustment within one slot, i.e., power adjustment at the symbol level. Similar to the power adjustment at the slot level (or subframe level) in NR Rel-15, such dynamic power adjustment (power adjustment at the symbol level) increases the complexity of the hardware implementation of the device and increases the requirements for device functionality.

[0138] To solve this problem, UE1 may select the greater of the powers of PSCCH / PSSCH and PSFCH as the final transmission power. That is, P=max{Pm,Pn}, and always transmit PSCCH, PSSCH, and PSFCH using power P in the slot. If the smaller of Pm and Pn is Pmin=min{Pm,Pn}, the adjusted transmission power P is higher than the original power value Pmin determined by power control, and the receiving device of Pmin does not know the actual transmission power adjustment.

[0139] In one aspect, the at least two transmit powers include a first transmit power that is the maximum transmit power and a second transmit power that is less than the maximum transmit power.

[0140] In one aspect, for the second transmit power, a phase modulation scheme is used to transmit information related to the second transmit power, for example, sidelink control information (SCI) may be used to indicate the phase modulation scheme.

[0141] For example, UE1 may transmit information using a phase modulation scheme (such as QPSK) without affecting the normal reception of the device. It may also adjust the code rate according to the phase modulation scheme and notify the Pmin receiving device of the modulation coding scheme actually used in the SCI. Because the magnitude of the power does not affect the demodulation performance of the phase modulation symbol, the device receiving the phase modulation symbol (corresponding to the power Pmin) can still correctly receive the modulation, and the power adjustment is transparent to the device.

[0142] In one aspect, the first transmit power may be transmitted to a receiving device of the second transmit power using at least one of signaling or information: radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI).

[0143] In one aspect, at least one of signaling or information of Radio Resource Control (RRC) signaling, System Information (SI), Sidelink Control Information (SCI), and Downlink Control Information (DCI) may be used to transmit the difference or ratio between the first transmit power and the second transmit power to a receiving device of the second transmit power.

[0144] For example, UE1 may notify the Pmin receiving device of the adjusted power P via signaling (e.g., SCI). Alternatively, UE1 may notify the Pmin receiving device of the power variable ΔP=P-Pmin or ΔP=Pmin-P via signaling (e.g., SCI). This allows the receiving device to restore the actual transmission power P.

[0145] This allows for reducing the complexity of power control and power adjustment by using the maximum power when transmitting using multiple powers within one slot.

[0146] Example 4 An embodiment of the present invention provides a sidelink resource indication method in which a terminal device or a network device indicates to a second device, where the terminal device may be a first device that performs sidelink communication with the second device, or may be another terminal device, and the present invention is not limited thereto.

[0147] In this embodiment, a terminal device or a network device transmits length information indicating the length of a first portion of a slot to a second device, where the length information is used by the second device to transmit and / or receive sidelink information with the first device.

[0148] In one aspect, the length information is used by the second device to perform AGC on the first portion.

[0149] In one aspect, the length information includes at least one of a length of a physical sidelink feedback channel, a slot length corresponding to a numerology, and a length of a mini-slot.

[0150] In one aspect, the sidelink information includes information carried by at least one of a physical sidelink control channel, a physical sidelink shared channel, and a physical sidelink feedback channel.

[0151] In one aspect, if there are at least two lengths of the first portions within a time range that overlaps in time with the slot, the lengths of the at least two first portions are configured to be the same.

[0152] In one aspect, the length information comprises at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI).

[0153] In one aspect, the cyclic redundancy check code (CRC) of the sidelink control information is scrambled using a common identifier.

[0154] In one aspect, the sidelink control information indicates at least one of the length of the physical sidelink feedback channel, the slot in which the physical sidelink feedback channel is located, the symbol in which the physical sidelink feedback channel is located, the resource block in which the physical sidelink feedback channel is located, the slot in which the physical sidelink shared channel is located, the symbol in which the physical sidelink shared channel is located, and the resource block in which the physical sidelink shared channel is located.

[0155] In one aspect, the length information is configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0156] In one aspect, the time-frequency resources comprise at least one of radio resource control (RRC) signaling, system information, sidelink control information, and downlink control information.

[0157] In one aspect, the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier.

[0158] In one aspect, the length information is predefined.

[0159] In one aspect, one or more symbols prior to the first portion in the slot carry information for the automatic gain control.

[0160] In one aspect, one or more symbols before the first portion in the slot are a guard interval.

[0161] In one aspect, one symbol before the first portion in the slot carries information for the automatic gain control and is a guard interval.

[0162] In one aspect, the slot further includes at least a second portion, and one or more symbols in the slot prior to the second portion carry information for automatic gain control and / or are a guard interval.

[0163] In one aspect, the second part is a physical sidelink control channel and / or a physical sidelink shared channel.

[0164] In one aspect, the first portion of the slot comprises a first demodulation reference signal, and another portion of the slot comprises at least a second demodulation reference signal.

[0165] In one aspect, the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0166] In one aspect, the time-frequency resources comprise at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI).

[0167] In one aspect, the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier.

[0168] In one aspect, if at least two transmit powers are required for the slot, the maximum transmit power of the at least two transmit powers is used as the transmit power for the slot.

[0169] In this embodiment, the second device receives length information transmitted by the terminal device or the network device, indicating the length of the first portion of the slot, and transmits and / or receives sidelink information with the first device based on the length information, thereby enabling the second device to process the first portion based on the length information, thereby improving the performance of sidelink transmission (e.g., improving the accuracy of AGC estimation).

[0170] Furthermore, a first demodulation reference signal is configured in the first portion of the slot, and a second demodulation reference signal is configured in the second portion of the slot. By separately configuring at least two types of DM-RS, the accuracy of sidelink channel estimation can be improved.

[0171] Furthermore, when transmission is performed using multiple power levels within one slot, the complexity of power control and power adjustment can be reduced by using the maximum power level among them for transmission.

[0172] <Example 5> An embodiment of the present invention provides a sidelink resource multiplexing device. The device may be, for example, a terminal device, or one or more elements or components configured in the terminal device. However, the present invention is not limited thereto, and may be, for example, a roadside device or a network device, or one or more elements or components configured in the roadside device or the network device. The description of the same content of the fifth embodiment as that of the first to third embodiments will be omitted.

[0173] 27 is a schematic diagram of a sidelink resource multiplexing apparatus 2700 according to an embodiment of the present invention. As shown in FIG. 27, the sidelink resource multiplexing apparatus 2700 includes the following components:

[0174] The receiving unit 2701 receives length information indicating the length of the first portion of the slot, transmitted by a terminal device or a network device.

[0175] The processing unit 2702 transmits and / or receives sidelink information to and from the first device based on the length information.

[0176] In one aspect, the processor performs automatic gain control on the first portion based on the length information.

[0177] In one aspect, the length information includes at least one of a length of a physical sidelink feedback channel, a slot length corresponding to a numerology, and a length of a minislot.

[0178] In one aspect, the sidelink information includes information carried by at least one of a physical sidelink control channel, a physical sidelink shared channel, and a physical sidelink feedback channel.

[0179] In one aspect, if there are at least two lengths of the first portions within a time range that overlaps in time with the slot, the lengths of the at least two first portions are configured to be the same.

[0180] In one aspect, the length information comprises at least one of radio resource control signaling, system information, sidelink control information, and downlink control information.

[0181] In one aspect, the cyclic redundancy check code of the sidelink control information is scrambled using a common identifier, and the sidelink control information indicates at least one of the length of the physical sidelink feedback channel, the slot in which the physical sidelink feedback channel is located, the symbol in which the physical sidelink feedback channel is located, the resource block in which the physical sidelink feedback channel is located, the slot in which the physical sidelink shared channel is located, the symbol in which the physical sidelink shared channel is located, and the resource block in which the physical sidelink shared channel is located.

[0182] In one aspect, the length information is configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0183] In one aspect, the time frequency resources are configured by at least one of radio resource control signaling, system information, sidelink control information, and downlink control information.

[0184] In one aspect, the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth, a carrier, and a component carrier.

[0185] In one aspect, the length information is predefined.

[0186] In one aspect, one or more symbols before the first portion of the slot carry information for automatic gain control, and one or more symbols before the first portion of the slot are a guard interval.

[0187] In one aspect, the slot further includes at least a second portion, and one or more symbols in the slot prior to the second portion carry information for automatic gain control and / or are a guard interval.

[0188] In one aspect, the first portion of the slot comprises a first demodulation reference signal; The other portion of the slot comprises at least a second demodulation reference signal.

[0189] In one aspect, the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources, the time-frequency resources including one or more slots in the time domain and one or more resource blocks in the frequency domain.

[0190] In one aspect, the time frequency resources are configured by at least one of radio resource control signaling, system information, sidelink control information, and downlink control information.

[0191] In one aspect, the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth, a carrier, and a component carrier.

[0192] In one aspect, if at least two transmit powers are required for the slot, the maximum transmit power of the at least two transmit powers is used as the transmit power for the slot.

[0193] Although the above description is limited to the components or modules relevant to the present invention, the present invention is not limited thereto. The sidelink resource multiplexing device 2700 may further include other components or modules. For specific details of these components or modules, please refer to the related art.

[0194] Furthermore, for convenience of explanation, Figure 27 only exemplifies the connection relationships or signal directions between various components or modules, but it is clear to those skilled in the art that various related technologies such as bus connections can be used. The above-mentioned various components or modules may be implemented by hardware equipment such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0195] In this embodiment, the second device receives length information transmitted by the terminal device or the network device, indicating the length of the first portion of the slot, and transmits and / or receives sidelink information with the first device based on the length information, thereby enabling the second device to process the first portion based on the length information, thereby improving the performance of sidelink transmission (e.g., improving the accuracy of AGC estimation).

[0196] Furthermore, a first demodulation reference signal is configured in the first portion of the slot, and a second demodulation reference signal is configured in the second portion of the slot. By separately configuring at least two types of DM-RS, the accuracy of sidelink channel estimation can be improved.

[0197] Furthermore, when transmission is performed using multiple power levels within one slot, the complexity of power control and power adjustment can be reduced by using the maximum power level among them for transmission.

[0198] Example 6 An embodiment of the present invention provides a sidelink resource instruction device. The device may be, for example, a terminal device or a network device, or one or more elements or components configured in the terminal device or the network device. However, the present invention is not limited thereto, and may be, for example, a roadside device, or one or more elements or components configured in the roadside device. The same content of the sixth embodiment as that of the fourth embodiment will not be described again.

[0199] 28 is a schematic diagram of a sidelink resource indication apparatus 2800 according to an embodiment of the present invention. As shown in FIG. 28, the sidelink resource indication apparatus 2800 includes the following components:

[0200] The transmitter 2801 transmits length information indicating the length of the first portion of the slot to a second device, where the length information is used by the second device to transmit and / or receive sidelink information with the first device.

[0201] Although the above description is limited to the components or modules relevant to the present invention, the present invention is not limited thereto. The sidelink resource indication device 2800 may further include other components or modules. For specific details of these components or modules, please refer to the related art.

[0202] Furthermore, for convenience of explanation, Figure 28 only exemplifies the connection relationships or signal directions between various components or modules, but it is clear to those skilled in the art that various related technologies such as bus connections can be used. The above-mentioned various components or modules may be implemented by hardware equipment such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0203] In this embodiment, the second device receives length information transmitted by the terminal device or the network device, indicating the length of the first portion of the slot, and transmits and / or receives sidelink information with the first device based on the length information, thereby enabling the second device to process the first portion based on the length information, thereby improving the performance of sidelink transmission (e.g., improving the accuracy of AGC estimation).

[0204] Furthermore, a first demodulation reference signal is configured in the first portion of the slot, and a second demodulation reference signal is configured in the second portion of the slot. By separately configuring at least two types of DM-RS, the accuracy of sidelink channel estimation can be improved.

[0205] Furthermore, when transmission is performed using multiple power levels within one slot, the complexity of power control and power adjustment can be reduced by using the maximum power level among them for transmission.

[0206] Example 7 An embodiment of the present invention further provides a communication system, and may refer to Fig. 1, and the description of the same contents as those in the first to sixth embodiments will be omitted. In this embodiment, the communication system 100 may include the following components:

[0207] The first device 102 is in sidelink communication with the second device 103.

[0208] The second device 103 receives length information transmitted by the terminal device or network device indicating the length of the first portion of the slot, and transmits and / or receives sidelink information with the first device 102 based on the length information.

[0209] As shown in FIG. 1, the communication system 100 may further include the following components:

[0210] The network device 101 provides a service to the first device 102 and / or the second device 103. For example, the network device 101 transmits length information indicating the length of a first portion of one slot to the second device 103.

[0211] An embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited thereto and may be other network devices.

[0212] Figure 29 is a schematic diagram of a network device according to an embodiment of the present invention. As shown in Figure 29, the network device 2900 may include a processor 2910 (e.g., a central processing unit (CPU)) and a memory 2920, which is connected to the processor 2910. The memory 2920 may store various data, and may further store an information processing program 2930, which is executed under the control of the processor 2910.

[0213] For example, the processor 2910 may be configured to execute a program to implement the sidelink resource indication method described in Example 4. For example, the processor 2910 may be configured to transmit length information indicating a length of a first portion of a slot to a second device, where the length information is used by the second device to transmit and / or receive sidelink information with the first device.

[0214] 29, the network device 2900 may further include a transceiver 2940 and an antenna 2950. The functions of the above components are similar to those of the prior art, and a description thereof will be omitted here. The network device 2900 does not need to include all the units shown in FIG. 29. The network device 2900 may further include units not shown in FIG. 29, and prior art may be referred to.

[0215] Although the embodiment of the present invention further provides a terminal device, the present invention is not limited thereto and may be other devices.

[0216] Fig. 30 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in Fig. 30, the terminal device 3000 may include a processor 3010 and a memory 3020, where the memory 3020 stores data and programs and is connected to the processor 3010. It should be noted that this diagram is illustrative, and other types of structures may be used to supplement or replace this structure to realize communication functions or other functions.

[0217] For example, the processor 3010 may be configured to execute a program to implement the sidelink resource multiplexing method described in Example 1. For example, the processor 3010 may be configured to receive length information, transmitted by a terminal device or a network device, indicating a length of a first portion of a slot, and to transmit and / or receive sidelink information with the first device based on the length information.

[0218] In another example, the processor 3010 may be configured to execute a program to implement the sidelink resource multiplexing method according to example 2. For example, the processor 3010 may be configured to transmit and / or receive sidelink information with a first device in a slot, the slot including at least a first portion and a second portion, the first portion of the slot configured with a first demodulation reference signal, and the second portion of the slot configured with a second demodulation reference signal.

[0219] In another example, the processor 3010 may be configured to execute a program to implement the sidelink resource multiplexing method described in Example 3. For example, the processor 3010 may be configured to transmit and / or receive sidelink information with the first device in a slot, where, if at least two transmission powers are required for the slot, the maximum transmission power of the at least two transmission powers is used as the transmission power for the slot.

[0220] 30, the terminal device 3000 may further include a communication module 3030, an input unit 3040, a display 3050, a power supply 3060, and the like. Here, the functions of the above units are similar to those of the prior art, and therefore, description thereof will be omitted here. Note that the terminal device 3000 does not need to include all of the units shown in FIG. 30. The terminal device 3000 may further include units not shown in FIG. 30, and prior art may be referred to.

[0221] In an embodiment of the present invention, there is further provided a computer-readable program, which, when executed in a terminal device, causes the terminal device to execute the sidelink resource multiplexing method according to any one of embodiments 1 to 3 or the sidelink resource indication method according to embodiment 4.

[0222] An embodiment of the present invention further provides a storage medium having a computer-readable program stored therein, the program causing a terminal device to execute the sidelink resource multiplexing method according to any one of the first to third embodiments or the sidelink resource indication method according to the fourth embodiment when the program is executed.

[0223] In an embodiment of the present invention, there is further provided a computer-readable program, which, when executed in a network device, causes the network device to perform the sidelink resource multiplexing method according to any one of the first to third embodiments or the sidelink resource indication method according to the fourth embodiment.

[0224] An embodiment of the present invention further provides a storage medium having a computer-readable program stored thereon, the program, when executed, causing a network device to perform the sidelink resource multiplexing method according to any one of the first to third embodiments or the sidelink resource indication method according to any one of the first to third embodiments.

[0225] The above-described apparatus and method of the present invention may be realized by hardware or a combination of hardware and software. The present invention relates to a computer-readable program that, when executed by a logic unit, causes the logic unit to implement the above-described apparatus or components, or to implement the above-described various methods or steps. The present invention also relates to a storage medium for storing the above-described program, such as a hard disk, magnetic disk, optical disk, DVD, flash memory, etc.

[0226] Each processing method in each device described with reference to the embodiments of the present invention may be implemented as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in the drawings, or one or more combinations of the functional block diagrams (e.g., a receiving unit, a determining unit, a transmitting unit, etc.), may correspond to each software module in the computer program flow or each hardware module. These software modules may correspond to each step shown in the drawings. These hardware modules may be realized by implementing these software modules in hardware, for example, using a field programmable gate array (FPGA).

[0227] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known to those skilled in the art. The storage medium may be connected to the processor so that the processor reads information from or writes information to the storage medium, or the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card inserted into the mobile terminal. For example, if a device (e.g., a mobile terminal) uses a relatively large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0228] One or more of the functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any suitable combination thereof to perform the functions described herein. One or more of the functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with, for example, a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in combination with a DSP communication, or any other configuration.

[0229] Although the present invention has been described above with reference to specific embodiments, the above description is merely illustrative and does not limit the scope of protection of the present invention. Various modifications and changes may be made to the present invention without departing from the spirit and principles of the present invention, and these modifications and changes are also within the scope of the present invention.

[0230] Furthermore, the following supplementary notes are disclosed regarding the embodiments including the above-mentioned examples. (Appendix 1) 1. A sidelink resource multiplexing method, comprising: receiving, by a second device, length information transmitted by the terminal device or the network device, the length information indicating the length of the first portion of the slot; and wherein the second device transmits and / or receives sidelink information with the first device based on the length information. (Appendix 2) 2. The method of claim 1, wherein the second device performs automatic gain control on the first portion based on the length information. (Appendix 3) 3. The method of claim 1, wherein the length information includes at least one of a length of a physical sidelink feedback channel, a slot length corresponding to a numerology, and a length of a mini-slot. (Appendix 4) 4. The method according to any of claims 1 to 3, wherein the sidelink information comprises information carried by at least one of a physical sidelink control channel, a physical sidelink shared channel, and a physical sidelink feedback channel. (Appendix 5) 5. The method of claim 1, wherein if there are at least two lengths of the first portions within a time range that overlaps with the slot, the lengths of the at least two first portions are configured to be the same. (Appendix 6) 6. The method of any of Supplementary Notes 1 to 5, wherein the length information is comprised of at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 7) 7. The method of claim 6, wherein a cyclic redundancy check code (CRC) of the sidelink control information is scrambled using a common identifier. (Appendix 8) 8. The method according to claim 7, wherein the sidelink control information indicates at least one of the length of the physical sidelink feedback channel, the slot in which the physical sidelink feedback channel is located, the symbol in which the physical sidelink feedback channel is located, the resource block in which the physical sidelink feedback channel is located, the slot in which the physical sidelink shared channel is located, the symbol in which the physical sidelink shared channel is located, and the resource block in which the physical sidelink shared channel is located. (Appendix 9) 7. The method of claim 6, wherein if first length information configured by the sidelink control information (SCI) and / or the downlink control information (DCI) in a slot is different from second length information configured by the radio resource control (RRC) signaling and / or the system information (SI), the length information of the slot is determined to be the first length information. (Appendix 10) the length information is configured, pre-configured or pre-defined to relate to one or a group of time-frequency resources; 10. The method of any of Supplementary Notes 1 to 9, wherein the time-frequency resource comprises one or more slots in the time domain and one or more resource blocks in the frequency domain. (Appendix 11) 11. The method of claim 10, wherein the time-frequency resources are configured by at least one of radio resource control (RRC) signaling, system information, sidelink control information, and downlink control information. (Appendix 12) 12. The method of claim 10 or 11, wherein the time-frequency resource comprises at least one of a receiving resource pool, a transmitting resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier. (Appendix 13) 6. The method of any one of claims 1 to 5, wherein the length information is predefined. (Appendix 14) 14. The method of any of claims 1 to 13, wherein one or more symbols before the first portion in the slot carry information for the automatic gain control. (Appendix 15) 15. The method of claim 14, wherein one or more symbols before the first portion in the slot are a guard interval. (Appendix 16) 14. The method of any one of Supplementary Notes 1 to 13, wherein one symbol before the first portion in the slot carries information for the automatic gain control and is a guard interval. (Appendix 17) the slot further includes at least a second portion; 17. The method of any of claims 1 to 16, wherein one or more symbols before the second portion of the slot carry information for automatic gain control and / or are a guard interval. (Appendix 18) 18. The method of claim 17, wherein the second part is a physical sidelink control channel and / or a physical sidelink shared channel. (Appendix 19) a first demodulation reference signal is configured in the first portion of the slot; 19. The method of any one of claims 1 to 18, wherein another portion of the slot comprises at least a second demodulation reference signal. (Appendix 20) the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources; 20. The method of claim 19, wherein the time-frequency resource comprises one or more slots in the time domain and one or more resource blocks in the frequency domain. (Appendix 21) 21. The method of claim 20, wherein the time-frequency resources are configured by at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 22) 22. The method of claim 20 or 21, wherein the time-frequency resource comprises at least one of a receiving resource pool, a transmitting resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier. (Appendix 23) 23. A method as claimed in any one of Supplementary Notes 1 to 22, wherein if at least two transmission powers are required for the slot, the maximum transmission power of the at least two transmission powers is used as the transmission power for the slot. (Appendix 24) 24. The method of claim 23, wherein the at least two transmit powers include a first transmit power that is the maximum transmit power and a second transmit power that is less than the maximum transmit power. (Appendix 25) 25. The method of claim 24, wherein for the second transmission power, information related to the second transmission power is transmitted using a phase modulation scheme. (Appendix 26) 26. The method of claim 25, wherein the phase modulation scheme is indicated using sidelink control information (SCI). (Appendix 27) 25. The method of claim 24, wherein the first transmit power is transmitted to a receiving device of the second transmit power using at least one of signaling or information of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 28) 25. The method of claim 24, wherein the difference or ratio between the first transmit power and the second transmit power is transmitted to a receiving device of the second transmit power using at least one of signaling or information of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 29) 1. A sidelink resource multiplexing method, comprising: transmitting and / or receiving sidelink information from the second device to the first device in the slot; the slot includes at least a first portion and a second portion; a first demodulation reference signal is configured in the first portion of the slot; The second portion of the slot comprises a second demodulation reference signal. (Appendix 30) the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources; 30. The method of claim 29, wherein the time-frequency resource comprises one or more slots in the time domain and one or more resource blocks in the frequency domain. (Appendix 31) 31. The method of claim 30, wherein the time-frequency resources are configured by at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 32) 32. The method of claim 30 or 31, wherein the time-frequency resource comprises at least one of a receiving resource pool, a transmitting resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier. (Appendix 33) 1. A sidelink resource multiplexing method, comprising: transmitting and / or receiving sidelink information from the second device to the first device in the slot; If at least two transmission powers are required for the slot, the maximum transmission power of the at least two transmission powers is used as the transmission power for the slot. (Appendix 34) 34. The method of claim 33, wherein the at least two transmit powers include a first transmit power that is the maximum transmit power and a second transmit power that is less than the maximum transmit power. (Appendix 35) 35. The method of claim 34, wherein for the second transmission power, information related to the second transmission power is transmitted using a phase modulation scheme. (Appendix 36) 36. The method of claim 35, wherein the phase modulation scheme is indicated using sidelink control information (SCI). (Appendix 37) 35. The method of claim 34, wherein the first transmit power is transmitted to a receiving device of the second transmit power using at least one of signaling or information: radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 38) 35. The method of claim 34, wherein the difference or ratio between the first transmit power and the second transmit power is transmitted to a receiving device of the second transmit power using at least one of signaling or information of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 39) 1. A sidelink resource indication method, comprising: a terminal device or a network device transmitting length information indicating a length of the first portion of the slot to a second device; wherein the length information is used by the second device to transmit and / or receive sidelink information with a first device. (Appendix 40) 40. The method of claim 39, wherein the length information is used by the second device to perform automatic gain control on the first portion. (Appendix 41) 41. The method of claim 39 or 40, wherein the length information includes at least one of a length of a physical sidelink feedback channel, a slot length corresponding to a numerology, and a length of a mini-slot. (Appendix 42) 42. The method according to any of Supplementary Notes 39 to 41, wherein the sidelink information comprises information carried by at least one of a physical sidelink control channel, a physical sidelink shared channel, and a physical sidelink feedback channel. (Appendix 43) 43. The method of any one of claims 39 to 42, wherein if there are at least two lengths of the first portions within a time range that overlaps with the slot, the lengths of the at least two first portions are configured to be the same. (Appendix 44) 44. The method of any of Supplementary Notes 39 to 43, wherein the length information is comprised of at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 45) 45. The method of claim 44, wherein a cyclic redundancy check code (CRC) of the sidelink control information is scrambled using a common identifier. (Appendix 46) 46. ​​The method of claim 45, wherein the sidelink control information indicates at least one of the length of the physical sidelink feedback channel, the slot in which the physical sidelink feedback channel is located, the symbol in which the physical sidelink feedback channel is located, the resource block in which the physical sidelink feedback channel is located, the slot in which the physical sidelink shared channel is located, the symbol in which the physical sidelink shared channel is located, and the resource block in which the physical sidelink shared channel is located. (Appendix 47) 45. The method of claim 44, wherein if first length information configured by the sidelink control information (SCI) and / or the downlink control information (DCI) in a slot is different from second length information configured by the radio resource control (RRC) signaling and / or the system information (SI), the length information of the slot is determined to be the first length information. (Appendix 48) the length information is configured, pre-configured or pre-defined to relate to one or a group of time-frequency resources; 48. The method of any of claims 39 to 47, wherein the time-frequency resource comprises one or more slots in the time domain and one or more resource blocks in the frequency domain. (Appendix 49) 49. The method of claim 48, wherein the time-frequency resources are configured by at least one of radio resource control (RRC) signaling, system information, sidelink control information, and downlink control information. (Appendix 50) 50. The method of claim 48 or 49, wherein the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier. (Appendix 51) 45. The method of any of claims 39 to 44, wherein the length information is predefined. (Appendix 52) 52. The method of any of claims 39 to 51, wherein one or more symbols before the first portion in the slot carry information for the automatic gain control. (Appendix 53) 53. The method of claim 52, wherein one or more symbols before the first portion in the slot are a guard interval. (Appendix 54) 52. The method of any of claims 39 to 51, wherein one symbol before the first portion in the slot carries information for the automatic gain control and is a guard interval. (Appendix 55) the slot further includes at least a second portion; 55. The method of any of claims 39 to 54, wherein one or more symbols before the second portion of the slot carry information for automatic gain control and / or are a guard interval. (Appendix 56) 56. The method of claim 55, wherein the second part is a physical sidelink control channel and / or a physical sidelink shared channel. (Appendix 57) a first demodulation reference signal is configured in the first portion of the slot; 57. The method of any one of claims 39 to 56, wherein another portion of the slot comprises at least a second demodulation reference signal. (Appendix 58) the first demodulation reference signal and / or the second demodulation reference signal are configured, pre-configured, or pre-defined to be associated with one or a group of time-frequency resources; 58. The method of claim 57, wherein the time-frequency resource comprises one or more slots in the time domain and one or more resource blocks in the frequency domain. (Appendix 59) 59. The method of claim 58, wherein the time-frequency resources are configured by at least one of radio resource control (RRC) signaling, system information (SI), sidelink control information (SCI), and downlink control information (DCI). (Appendix 60) 60. The method of claim 58 or 59, wherein the time-frequency resources include at least one of a receive resource pool, a transmit resource pool, a fractional bandwidth (BWP), a carrier, and a component carrier. (Appendix 61) 61. A method as claimed in any one of claims 39 to 60, wherein if at least two transmission powers are required for the slot, the maximum transmission power of the at least two transmission powers is used as the transmission power for the slot. (Appendix 62) A terminal device including a memory and a processor, The memory stores a computer program; 62. A terminal device, wherein the processor is configured to implement the sidelink resource multiplexing method according to any one of Supplementary Notes 1 to 38 or the sidelink resource indication method according to any one of Supplementary Notes 39 to 61 by executing the computer program. (Appendix 63) A network device comprising: a memory; and a processor, The memory stores a computer program; 62. A network device, wherein the processor is configured to execute the computer program to implement the sidelink resource indication method according to any of Supplementary Notes 39 to 61.

Claims

1. A receiving unit that receives a PSCCH and a PSSCH; a communication unit for transmitting a plurality of PSFCHs on a plurality of carriers in the same slot as the PSSCH; A terminal device, wherein a PSFCH on a carrier has a PSFCH length, the PSFCHs on the multiple carriers overlap in time, and the lengths of the PSFCHs are the same.

2. A control unit that acquires first information regarding a first interval in a slot in which the PSFCH is transmitted or received, and controls transmission or reception of the PSSCH according to the first information, The communication unit transmits or receives the PSSCH in a second interval in the slot, the second interval being different from the first interval; The terminal device according to claim 1 , wherein the first section is configured using at least one of a signal of an RRC (Radio Resource Control) layer and side link control information.

3. The terminal device according to claim 2 , wherein the first information regarding the first interval is information included in a signal of the RRC layer or information included in sidelink control information.

4. The terminal device according to claim 2 , wherein the first interval is made up of a predetermined number of symbols, and the second interval is made up of less than the symbols included in the slot minus the predetermined number of symbols.

5. The terminal device according to claim 2 , wherein one or more symbols before the first interval in the slot are not included in the second interval.

6. The terminal device of claim 5 , wherein the one or more symbols carry information for automatic gain control and / or are used as a guard interval.

7. The terminal device according to claim 5 , wherein the communication unit receives the PSFCH transmitted from another terminal device in the first interval.

8. A transmitting unit that transmits a PSCCH and a PSSCH to a terminal device; a receiver for receiving a plurality of PSFCHs on a plurality of carriers in the same slot as the PSSCH; a PSFCH on a carrier has a PSFCH length, the PSFCHs on the multiple carriers overlap in time, and the lengths of the PSFCHs are the same.

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