System and method for timing information transmission

Abstract

A system and method for receiving a downlink control signal are disclosed herein. In one embodiment, a method performed by a wireless communication device includes: receiving a first signal from a wireless communication node on a first time domain unit by the wireless communication device; and transmitting a second signal to the wireless communication node on a second time domain unit by the wireless communication device, the second signal carrying time information indicating when the wireless communication device received the first signal.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications and, more particularly, to systems and methods for timing information transmission. Background Art

[0002] In a fifth generation (5G) New Radio (NR) mobile network, before a user equipment (UE) can send data to the network, the UE needs to obtain uplink and downlink synchronization with the network. This synchronization can be achieved by performing a random access procedure. Summary of the invention

[0003] The example embodiments disclosed herein are intended to solve problems related to one or more difficulties existing in the prior art, as well as to provide additional features that will become apparent by reference to the following detailed description when combined with the accompanying drawings. According to various embodiments, example systems, methods, devices, and computer program products are disclosed herein. However, it will be understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who have read this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0004] In one embodiment, a wireless communication method includes: receiving a first signal from a wireless communication node on a first time domain unit by a wireless communication device; and transmitting a second signal to the wireless communication node on a second time domain unit by the wireless communication device, wherein the second signal carries time information indicating when the wireless communication device received the first signal.

[0005] In some embodiments, the wireless communication method includes: receiving, by the wireless communication device, a third signal from the wireless communication node on a third time domain unit. In some embodiments, the third signal is configured to trigger transmission of the second signal. In some embodiments, the third signal includes at least one of downlink control information (DCI) or a media access control (MAC) control element (CE).

[0006] In another embodiment, a wireless communication method includes: transmitting, by a wireless communication device, a first signal transmitted on a first time domain unit to a wireless communication node; and transmitting, by the wireless communication device, a second signal to the wireless communication node on a second time domain unit, the second signal carrying time information indicating when the wireless communication device transmitted the first signal.

[0007] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and depict only example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered as limiting the breadth, scope or applicability of the present solution. It should be noted that for the sake of clarity and ease of illustration, these drawings are not necessarily drawn to scale.

[0009] Figure 1 An example cellular communication network according to an embodiment of the present disclosure is shown, in which the techniques and other aspects disclosed herein may be implemented.

[0010] Figure 2 A block diagram of an example base station and user equipment according to some embodiments of the present disclosure is shown.

[0011] Figure 3 An example diagram of a transmission according to some embodiments of the present disclosure is shown.

[0012] Figure 4 is a diagram illustrating an example of reception time reporting according to some embodiments of the present disclosure.

[0013] Figure 5 is a diagram illustrating an example of reception time reporting according to some embodiments of the present disclosure.

[0014] Figure 6 is a diagram showing an example of a reference frame according to some embodiments of the present disclosure.

[0015] Figure 7 is a diagram illustrating an example of a reference frame according to some embodiments of the present disclosure.

[0016] Figure 8 is a diagram illustrating an example of a reference frame according to some embodiments of the present disclosure.

[0017] Fig. 9 is a diagram illustrating an example of a reference frame according to some embodiments of the present disclosure.

[0018] Fig.10 is a diagram illustrating an example of a delivery time report according to some embodiments of the present disclosure.

[0019] Fig.11 is a diagram illustrating an example of a delivery time report according to some embodiments of the present disclosure.

[0020] Fig.12 is a diagram illustrating an example of a reference frame according to some embodiments of the present disclosure.

[0021] Fig.13A flow chart illustrating a method for transmitting timing information according to some embodiments of the present disclosure is shown.

[0022] Fig.14 A flow chart illustrating a method for transmitting timing information according to some embodiments of the present disclosure is shown.

[0023] Fig.15 A flow chart illustrating a method for receiving timing information according to some embodiments of the present disclosure is shown.

[0024] Fig.16 A flow chart illustrating a method for receiving timing information according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0025] Various example embodiments of the present solution are described below with reference to the accompanying drawings to enable a person of ordinary skill in the art to make and use the present solution. It will be apparent to a person of ordinary skill in the art that, after reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the present solution. Therefore, the present solution is not limited to the example embodiments and applications described and illustrated herein. In addition, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes may be rearranged while remaining within the scope of the present solution. Therefore, a person of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or actions in a sample order, and unless otherwise expressly stated, the present solution is not limited to the specific order or hierarchy presented.

[0026] A. Network environment and computing environment

[0027] Figure 1 An example wireless communication network and / or system 100 is shown in accordance with an embodiment of the present disclosure, in which the techniques disclosed herein may be implemented. In the following discussion, the wireless communication network 100 may be any wireless network such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as "network 100." Such an example network 100 includes: a base station 102 (hereinafter referred to as "BS 102") and a user equipment 104 (hereinafter referred to as "UE 104") that may communicate with each other via a communication link 110 (e.g., a wireless communication channel), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 covering a geographic area 101. In Figure 11, BS 102 and UE 104 are contained within the respective geographic boundaries of cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating within its allocated bandwidth to provide adequate radio coverage to its intended users.

[0028] For example, BS 102 may operate under the allocated channel transmission bandwidth to provide sufficient coverage to UE 104. BS 102 and UE 104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In the present disclosure, BS 102 and UE 104 are generally described herein as non-limiting examples of "communication nodes" that may practice the methods disclosed herein. According to various embodiments of the present solution, such communication nodes may be capable of wireless and / or wired communication.

[0029] Figure 2 A block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to some embodiments of the present solution is shown. The system 200 may include components and elements configured to support known or conventional operating features, which need not be described in detail herein. In an illustrative embodiment, the system 200 may be used in a wireless communication environment (such as, for example, a wireless communication environment such as described above). Figure 1 The present invention relates to a method for communicating (eg, transmitting and receiving) data symbols in a wireless communication environment 100 of the present invention.

[0030] The system 200 generally includes a base station 202 (hereinafter referred to as "BS 202") and a user equipment 204 (hereinafter referred to as "UE 204"). The BS 202 includes: a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module is coupled to and interconnected with each other via a data communication bus 220 as needed. The UE 204 includes: a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module is coupled to and interconnected with each other via a data communication bus 240 as needed. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for data transmission as described herein.

[0031] As will be appreciated by those skilled in the art, the system 200 may also include Figure 2Any number of modules outside the modules shown. It will be appreciated by those skilled in the art that the various illustrative blocks, modules, circuits, and processing logic described in conjunction with the embodiments disclosed herein can be implemented in hardware, computer-readable software, firmware, or any actual combination thereof. In order to clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are generally described in terms of their functionality. Whether this functionality is implemented as hardware, firmware, or software can depend on specific applications and design constraints imposed on the entire system. A technician familiar with the concepts described herein can implement this functionality in a suitable manner for each specific application, but this implementation decision should not be interpreted as limiting the scope of the present disclosure.

[0032] According to some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230, which includes a radio frequency (RF) transmitter and an RF receiver, each including circuits coupled to an antenna 232. A duplex switch (not shown) may alternately couple the uplink transmitter or receiver to the uplink antenna in a time duplex manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210, which includes a radio frequency (RF) transmitter and an RF receiver, each including circuits coupled to an antenna 212. The downlink duplex switch may alternately couple the downlink transmitter or receiver to the downlink antenna 212 in a time division duplex manner. The operations of the two transceiver modules 210 and 230 can be coordinated in time so that while the downlink transmitter is coupled to the downlink antenna 212, the uplink receiver circuit is coupled to the uplink antenna 232 to receive transmissions over the wireless transmission link 250. In some embodiments, there is tight time synchronization with minimum guard time between changes in duplex direction.

[0033] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via a wireless data communication link 250 and cooperate with an appropriately configured RF antenna arrangement 212 / 232 capable of supporting a specific wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 230 and the base station transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards. However, it should be understood that the present disclosure is not necessarily limited to specific standards and related protocols in application. More specifically, the UE transceiver 230 and the base station transceiver 210 can be configured to support alternative or additional wireless data communication protocols, including future standards or variations thereof.

[0034] According to various embodiments, BS 202 may be, for example, an evolved Node B (eNB), a serving eNB, a target eNB, a femtocell or a microcell. According to some embodiments, UE 204 may be embodied in various types of user equipment, such as a mobile phone, a smart phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, a wearable computing device, etc. Processor modules 214 and 236 may be implemented or realized using a general-purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination thereof designed to perform the functions described herein. In this way, the processor may be implemented as a microprocessor, a controller, a microcontroller, a state machine, or the like. The processor may also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors coordinated with a digital signal processor core, or any other such configuration.

[0035] In addition, the steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be directly embodied in hardware, firmware, software modules executed by the processor modules 214 and 236, respectively, or any practical combination thereof. The memory modules 216 and 234 may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. In this regard, the memory modules 216 and 234 may be coupled to the processor modules 214 and 236, respectively, so that the processor modules 214 and 236 can read information from and write information to the memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 214 and 236. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions executed by the processor modules 214 and 236, respectively. The memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 214 and 236, respectively.

[0036] The network communication module 218 generally represents the hardware, software, firmware, processing logic and / or other components of the base station 202, which enables two-way communication between the BS transceiver 210 and other network components and the communication node configured to communicate with the base station 202. For example, the network communication module 218 can be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communication module 218 provides an 802.3 Ethernet interface so that the base station transceiver 210 can communicate with a conventional Ethernet-based computer network. In this way, the network communication module 218 can include a physical interface for connecting to a computer network (e.g., a mobile switching center (MSC)). As used herein with respect to a specified operation or function, the term "configured for...", "configured to..." and its word form changes refer to a device, component, circuit, structure, machine, signal, etc. that is physically constructed, programmed, formatted and / or arranged to perform a specified operation or function.

[0037] B. Timing information transmission

[0038] In wireless communication technology, a clock is required by communication devices. In the present disclosure, when a synchronization (sync) source is on a wireless terminal, some methods for obtaining a clock are provided for a network or a user equipment (UE).

[0039] In a wireless communication system, a UE (e.g., UE 104, UE 204, mobile device, wireless communication device, etc.) sends a physical random access channel (PRACH, e.g., msg1) to a network (e.g., network 100, system 200, BS 102, BS 202, gNB, eNB, wireless communication node, etc.). The network sends a random access response (RAR, e.g., msg2) to the UE after receiving the PRACH from the UE. The RAR schedules a physical uplink shared channel (PUSCH, e.g., msg3) for the UE. The UE sends the PUSCH to the network after receiving the RAR. The network sends a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH, e.g., msg4) to the UE after receiving msg3.

[0040] In a wireless communication system, a UE transmits a PRACH and a PUSCH (jointly, for example, msgA) to a network. After receiving msgA, the network transmits a RAR (for example, msgB) to the UE.

[0041] In some embodiments, the wireless communication system includes a time interval (eg, propagation delay) between the time when a sender (eg, UE or network) transmits a signal and the time when a receiver (eg, UE or network) receives the signal. Figure 3An example timing diagram of transmission according to some embodiments of the present disclosure is shown. Figure 3 As shown, the sender starts transmitting the signal from the transmission time t1, the receiver starts receiving the signal from the reception time t2, and the propagation delay is t2-t1. The transmission time and the reception time are absolute times, such as global positioning system (GPS) time, coordinated universal time (UTC) or local time. For example, the starting point of the signal is received at 13:32:16:138 milliseconds, 31 microseconds, 183 nanoseconds on March 17, 2019, and the message indicating the reception time (e.g., reception time message) includes the reception time, i.e., 13:32:16:138 milliseconds, 31 microseconds, 183 nanoseconds on March 17, 2019.

[0042] In some embodiments, the UE sends (e.g., reports, transmits, communicates, indicates) to the network a reception time (e.g., a first time, a first time value, a first time domain unit) of a first reference point (e.g., a first signal) received by the UE. The reception time of the first reference point is the time when the UE receives the first reference point from the network. The first reference point may be (e.g., identified as, occurring during, at, etc.) at least one of the boundaries (e.g., starting or ending boundaries) of a unit (e.g., a transmission, a transmission unit) such as a symbol (e.g., an orthogonal frequency division multiplexing (OFDM) symbol), a subslot, a slot, a subframe, or a frame (e.g., a system frame). The unit corresponding to the first reference point may be referred to as a reference unit (e.g., a reference transmission, a reference transmission unit) such as a reference symbol, a reference subslot, a reference slot, a reference subframe, and a reference system frame. In other words, the symbol, subslot, slot, subframe, and system frame corresponding to the first reference point may be referred to as a reference symbol, a reference subslot, a reference slot, a reference subframe, and a reference frame, respectively. In some embodiments, the wireless communication device receives a first signal from a wireless communication node on a first time domain unit. The wireless communication device transmits a second signal to the wireless communication node on a second time domain unit, the second signal carrying time information indicating when the wireless communication device received the first signal. In some embodiments, the wireless communication device transmits the first signal transmitted on the first time domain unit to the wireless communication node. The wireless communication device transmits the second signal to the wireless communication node on the second time domain unit, the second signal carrying time information indicating when the wireless communication device transmitted the first signal. In some embodiments, the time information includes the time of the start boundary or the end boundary of the first time domain unit.

[0043] The reference symbol is a downlink (DL) symbol that is used for downlink signal transmission. If the first reference point is the end boundary of the reference unit, the last one or more symbols of the reference unit are downlink symbols used for downlink signal transmission. If the first reference point is the start boundary of the reference unit, the first one or more symbols of the reference unit are downlink symbols used for downlink signal transmission. In some embodiments, the UE sends the reception time of the boundary of the reference unit to the network.

[0044] The information of the reception time may be in radio resource control (RRC) signaling, or medium access control (MAC) control element (CE), or uplink control information (UCI). In some embodiments, the time information is included in at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0045] In some embodiments, the reference unit is indicated by the network to the UE via RRC signaling or MAC CE or downlink control information (DCI). The network indicates to the UE a first reference point for receiving the time report. In some embodiments, the first time domain unit is indicated by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or downlink control information (DCI).

[0046] In some embodiments, the reference unit is indicated by the UE to the network via RRC signaling or MAC CE or UCI. The UE indicates to the network a first reference point for receiving the time report. In some embodiments, the first time domain unit is indicated by the wireless communication device via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0047] In some embodiments, the UE sends a reception time of the first reference point to the network at a specific (e.g., predetermined, occurring once per time period, etc.) time. In some embodiments, the reception time sent by the UE is a reception time of the indicated first reference point adjacent to the specific time (e.g., before the specific time and closest to it among the reference points before that time). The reception time may be carried by (e.g., transmitted by, included in, allocated to, corresponding to, etc.) a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). The time carried by the PUSCH or PUCCH is a reception time of the indicated first reference point adjacent to (e.g., before and closest to the start of the PUSCH or PUCCH). In some embodiments, the second signal includes at least one of a physical uplink control channel (PUCCH) signal or a physical uplink shared channel (PUSCH) signal.

[0048] Figure 4 is a diagram illustrating an example of a reception time report according to some embodiments of the present disclosure. Figure 4 As shown, system frame No. 5 is indicated (eg, by the network or by the UE) as a reference frame, and the first reference point is the starting boundary of the reference frame. Figure 4 In the example, there are 4 system frames, and the system frame number is 5. The first system frame number 5 is received starting from t1. In other words, the reception time of the starting boundary of the first reference frame is t1. Similarly, the reception times of the starting boundaries of the second, third and fourth reference frames are t2, t3 and t4, respectively. In some embodiments, the UE sends the reception time of the first reference point to the network at t5. Since the reference point of the second reference frame (e.g., the starting boundary of the second reference frame) is before t5 and closest to t5, the reception time sent by the UE at t5 is the reception time of the starting boundary of the second reference frame (i.e., t2 is sent by the UE as the reception time).

[0049] In some embodiments, the first reference point configured by the network is periodic. After receiving the first reference point and before receiving the next first reference point, the UE sends the reception time of the first reference point to the network. The reception time reported by the UE is also periodic, with the same periodicity as the first reference point. In some embodiments, the wireless communication device receives a first signal from the wireless communication node every specific time period. In some embodiments, the wireless communication device transmits a second signal to the wireless communication node during each time period, and the second signal carries time information indicating when the wireless communication device received the first signal.

[0050] In some embodiments, the reference cells configured by the network are periodic. After receiving each reference cell and before receiving the next reference cell, the UE sends the reception time to the network. The reception time reported by the UE is periodic, with the same periodicity as the reference cell. For periodic reference cells, the periodicity and offset can be configured. The offset of the reference cell is the time interval between one of the reference cells and the starting point. Typically, the starting point is the beginning of system frame 0.

[0051] Figure 5 is a diagram illustrating an example of a receive time report according to some embodiments of the present disclosure. The offset is 10 frames and the periodicity is 40 frames. The starting point is the beginning of system frame 0. Based on the offset and periodicity, Figure 5 The reference frames shown are system frame 10, system frame 50, system frame 90, and system frame 130. The starting boundaries of system frame 0, system frame 10, system frame 50, system frame 90, and system frame 130 are received at t1, t2, t3, t4, and t5, respectively. In some embodiments, the first reference point is the starting boundary of the reference frame.

[0052] For reference frame 10, after receiving frame 10 and before receiving frame 50, the UE sends the reception time of the starting boundary of frame 10 (i.e., t2) to the network. In another case, after t2 and before t3, the UE sends the reception time of the starting boundary of frame 10 (i.e., t2). Similarly, for reference frame 50, after receiving frame 50 and before receiving frame 90, the UE sends the reception time of the starting boundary of frame 50 (i.e., t3) to the network. In another case, after t3 and before t4, the UE sends the reception time of the starting boundary of frame 50 (i.e., t3).

[0053] In some embodiments, the reference unit, and, in some embodiments, the first reference point is implicitly indicated by the network. In some embodiments, the network sends downlink control information (DCI) for scheduling PUSCH to the UE, and in some embodiments, the DCI indicates that PUSCH is used to transmit the reception time. In some embodiments, the network sends a MAC CE to the UE, and the MAC CE indicates that the UE reports the reception time. In some embodiments, the reference unit is the first unit or the last unit on which the DCI or MAC CE is transmitted. For example, the reference symbol, subslot, slot, subframe and system frame are the first or last symbol, subslot, slot, subframe and frame on which the DCI or MAC CE is transmitted, respectively. In some embodiments, the DCI is carried by the PDCCH, and the MAC CE is carried by the PDSCH. The symbol, subslot, slot, subframe and frame on which the DCI is transmitted are respectively equal to the symbol, subslot, slot, subframe and frame of the PDCCH carrying the DCI. The symbol, subslot, slot, subframe and frame on which the MAC CE is transmitted are respectively equal to the symbol, subslot, slot, subframe and frame of the PDSCH carrying the MAC CE. In some embodiments, the wireless communication device receives a third signal from the wireless communication node on a third time domain unit. In some embodiments, the third signal is configured to trigger the transmission of the second signal. In some embodiments, the third signal includes at least one of downlink control information (DCI) and MAC CE. In some embodiments, each of the first, second and third time domain units includes at least one of the following: symbol, subslot, slot, subframe, frame.

[0054] Figure 6 is a diagram showing an example of a reference frame according to some embodiments of the present disclosure. System frame N (N is an integer) is received starting from t1. The reception time of the starting boundary of system frame N is t1, and the reception time of the ending boundary of system frame N is t2. PDCCH is transmitted on system frame N to schedule PUSCH. PDCCH also indicates that PUSCH is used to transmit the reception time. Therefore, the reference frame is system frame N. If the reference point is the starting boundary of the frame, the reception time of the reference point is t1, and the value of t1 can be reported to the network by the UE. If the reference point is the ending boundary of the frame, the reception time of the reference point is t2, and the value of t2 can be reported to the network by the UE.

[0055] Figure 7is a diagram showing an example of a reference frame according to some embodiments of the present disclosure. System frame N is received starting from t1. The reception time of the start boundary of system frame N is t1, and the reception time of the end boundary of system frame N is t2. MAC CE is transmitted on system frame N, and MAC CE is used to indicate that the UE reports the reception time to the network. Therefore, the reference frame is system frame N. If the reference point is the start boundary of the frame, the reception time of the reference point is t1, and the value of t1 can be reported to the network by the UE. If the reference point is the end boundary of the frame, the reception time of the reference point is t2, and the value of t2 can be reported to the network by the UE.

[0056] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates the reception time at which the PUSCH is to be transmitted. In some embodiments, the time interval between the DCI and the scheduled PUSCH is equal to or greater than a threshold. In some embodiments, the time interval between the last symbol of the PDCCH carrying the DCI and the first symbol of the scheduled PUSCH is equal to or greater than a threshold.

[0057] In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the reception time. In some embodiments, the reception time is carried by PUSCH or PUCCH. In some embodiments, the time interval between the MAC CE and the PUSCH or PUCCH is equal to or greater than a threshold. In some embodiments, the time interval between the last symbol of the PDSCH carrying the MAC CE and the first symbol of the PUSCH or PUCCH is equal to or greater than a threshold. The value of the threshold may be configured by the network or predefined by the specification.

[0058] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates that the PUSCH is to be transmitted at the reception time. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the reception time. In some embodiments, the reference symbol is a symbol before or after a symbol on which the DCI or MAC CE is transmitted, and there is a first offset between the reference symbol and the symbol on which the DCI or MAC CE is transmitted. In some embodiments, the reference unit is a unit before or after a unit on which the DCI or MAC CE is transmitted, and there is a first offset between the reference unit and the unit on which the DCI or MAC CE is transmitted. For example, the reference symbol, subslot, slot, subframe and frame are symbols, subslots, slots, subframes and frames before or after the corresponding symbols, subslots, slots, subframes and frames on which the DCI or MAC CE is transmitted, respectively, and there is a first offset between the two. The first offset is configured by the network or predefined by the specification. In some embodiments, there is a first time offset between the first time domain unit and the third time domain unit. In some embodiments, the first time offset is preconfigured or indicated by the wireless communication node.

[0059] Figure 8 is a diagram showing an example of a reference frame according to some embodiments of the present disclosure. System frame 20 is received starting from t1. The reception time of the start boundary of system frame 20 is t1, and the reception time of the end boundary of system frame 20 is t2. The first offset is 3 frames. The PDCCH transmitted on frame 23 indicates that the UE reports the reception time. Since the offset between frame 20 and frame 23 is 3 frames, the reference frame is frame 20. If the reference point is the start boundary of the reference frame, the reception time of the start boundary of system frame 20 (i.e., t1) is reported. If the reference point is the end boundary of the reference frame, the reception time of the end boundary of system frame 20 (i.e., t2) is reported.

[0060] In some embodiments, the UE sends a reception time of the first reference point to the network at a specific time. In some embodiments, the first reference point is before the specific time, wherein there is a second offset between the first reference point and the specific time. In some embodiments, the second offset is constant and can be configured by the network or predefined by the specification.

[0061] The UE sends the reception time of the first reference point to the network via an uplink transmission. The uplink transmission is a PUCCH or a PUSCH. In some embodiments, the reference unit precedes or follows the uplink transmission, wherein there is a second offset between the reference unit and the first unit of the uplink transmission. For example, the reference symbol, sub-slot, time slot, subframe and frame precede or follows the uplink transmission, wherein there is a second offset between the reference symbol, sub-slot, time slot, subframe and frame and the first symbol, sub-slot, time slot, subframe and frame of the uplink transmission, respectively. The second offset can be the number of symbols, sub-slots, time slots, subframes, frames or milliseconds. In some embodiments, the second offset is configured by the network or predefined by the specification. The value of the offset can be zero. In some embodiments, there is a second time offset between the first time domain unit and the second time domain unit on which the second signal is transmitted. In some embodiments, the second time offset is preconfigured or indicated by the wireless communication node.

[0062] Fig. 9 is a diagram showing an example of a reference frame according to some embodiments of the present disclosure. System frame 15 is received starting from t1. The reception time of the start boundary of system frame 15 is t1, and the reception time of the end boundary of system frame 15 is t2. The end boundary of system frame 15 is the start boundary of system frame 16. The reception time of the end boundary of system frame 16 is t3. The PUSCH transmitted on system frame 16 carries the reception time. The PUSCH transmitted in system frame 16 is used to transmit the reception time. The offset between the reference frame and the frame of the PUSCH (i.e., system frame 16) is 1 frame. Therefore, the reference frame is system frame 15. If the reference point is the start boundary of the reference frame, the reception time of the start boundary of system frame 15 (i.e., t1) is transmitted in the PUSCH. If the reference point is the end boundary of the reference frame, the reception time of the end boundary of system frame 15 (i.e., t2) is transmitted in the PUSCH.

[0063] When the network receives the reception time from the UE, the network can obtain the time when the network sent the first reference point. In some embodiments, the time when the network sent the first reference point is the reception time reported by the UE minus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time.

[0064] In some embodiments, the UE sends (e.g., reports) the transmission time of the second reference point to the network. The transmission time of the second reference point is the time when the UE transmits the reference point to the network. The second reference point can be at least one of the boundaries (e.g., starting or ending boundaries) of a unit such as a symbol, a sub-time slot, a time slot, a subframe, or a frame. The unit corresponding to the second reference point can be referred to as a reference unit, such as a reference symbol, a reference sub-time slot, a reference time slot, a reference subframe, and a reference system frame. In some embodiments, the wireless communication device transmits a first signal transmitted on a first time domain unit to a wireless communication node. The wireless communication device transmits a second signal to the wireless communication node on a second time domain unit, and the second signal carries time information indicating when the wireless communication device transmitted the first signal. In some embodiments, the time information includes the time of the starting boundary or the ending boundary of the first time domain unit.

[0065] The reference symbol is an uplink symbol that is used for uplink signal transmission. If the second reference point is the end boundary of the reference unit, the last one or more symbols of the reference unit are uplink symbols used for uplink signal transmission. If the second reference point is the start boundary of the reference unit, the first one or more symbols of the reference unit are uplink symbols used for uplink signal transmission. In some embodiments, the UE sends the transmission time of the start or end boundary of the reference unit to the network.

[0066] The information of the transmission time may be in RRC signaling, or MAC CE, or UCI. In some embodiments, the time information is included in at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0067] In some embodiments, the reference unit is indicated by the network to the UE via RRC signaling, MAC CE or DCI. In some embodiments, the second reference point for transmitting the time report is indicated by the network to the UE. In some embodiments, the first time domain unit is indicated by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or downlink control information (DCI).

[0068] In some embodiments, the reference unit is indicated by the UE to the network via RRC signaling, MAC CE or UCI. In some embodiments, the second reference point for transmitting the time report is indicated by the UE to the network. In some embodiments, the first time domain unit is indicated by the wireless communication device via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or uplink control information (UCI).

[0069] The UE sends a transmission time of the second reference point to the network at a specific time. In some embodiments, the transmission time sent by the UE is the transmission time of the indicated second reference point adjacent to the specific time (e.g., before and closest to the specific time). The transmission time may be carried by PUSCH or PUCCH. In some embodiments, the transmission time carried by PUSCH or PUCCH is the transmission time of the indicated second reference point before and closest to the start of PUSCH or PUSCH.

[0070] Fig.10 is a diagram showing an example of transmission time reporting according to some embodiments of the present disclosure. System frame No. 5 is indicated as a reference frame. The second reference point is the end boundary of the reference frame. There are 4 system frames, and the system frame number is 5. The first system frame No. 5 is transmitted with t1 as the end boundary. Therefore, the transmission time of the end boundary of the first reference frame is t1. Similarly, the transmission time of the end boundary of the second reference frame is t2. The transmission time of the end boundary of the third reference frame is t3. The transmission time of the end boundary of the fourth reference frame is t4. The UE sends the transmission time of the second reference point to the network at t5. Since the reference point of the second reference boundary (e.g., the end boundary of the second reference frame) is before t5 and closest to t5, the transmission time sent by the UE at t5 is the transmission time of the end boundary of the second reference frame (i.e., t2 is sent by the UE as the reception time).

[0071] In some embodiments, the second reference point configured by the network is periodic. After transmitting each second reference point and before transmitting the next second reference point, the UE sends the transmission time of the second reference point to the network. The transmission time report sent by the UE is also periodic, with the same periodicity as the second reference point.

[0072] In some embodiments, the reference symbol, reference unit, configured by the network is periodic. After transmitting each reference unit and before transmitting the next reference unit, the UE sends the transmission time to the network. The transmission time report performed by the UE is periodic and has the same periodicity as the reference unit. In some embodiments, the wireless communication device transmits a first signal to the wireless communication node every specific time period. In some embodiments, the wireless communication device transmits a second signal to the wireless communication node during each time period, and the second signal carries time information indicating when the wireless communication device transmitted the first signal.

[0073] Fig.11 is a diagram illustrating an example of a transmission time report according to some embodiments of the present disclosure. The offset is 10 frames and the periodicity is 40 frames. The starting point is the beginning of system frame 0. Based on the offset and periodicity, Fig.11The reference frames shown are system frame 10, system frame 50, system frame 90 and system frame 130. The starting boundaries of system frame 0, system frame 10, system frame 50, system frame 90 and system frame 130 are transmitted at t1, t2, t3, t4 and t5 respectively. In some embodiments, the second reference point is the starting boundary of the reference frame.

[0074] For reference frame 10, after transmitting frame 10 and before transmitting frame 50, the UE sends the transmission time of the starting boundary of frame 10 (i.e., t2) to the network. In another case, after t2 and before t3, the UE sends the transmission time of the starting boundary of frame 10 (i.e., t2). Similarly, for reference frame 50, after transmitting frame 50 and before transmitting frame 90, the UE sends the transmission time of the starting boundary of frame 50 (i.e., t3) to the network. In another case, after t3 and before t4, the UE sends the transmission time of the starting boundary of frame 50 (i.e., t3).

[0075] In some embodiments, the reference unit is implicitly indicated by the network, and in some embodiments, implicitly indicated by the first reference point.

[0076] In some embodiments, the network sends downlink control information (DCI) for scheduling PUSCH to the UE, and in some embodiments, the DCI indicates that PUSCH is used to transmit the transmission time. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the transmission time. The transmission time may be carried by PUSCH or PUCCH. In some embodiments, the reference unit is the first or last unit on which PUSCH or PUCCH is transmitted.

[0077] Fig.12 is a diagram showing an example of a reference frame according to some embodiments of the present disclosure. System frame N (N is an integer) is transmitted starting from t1. The transmission time of the starting boundary of system frame N is t1, and the transmission time of the ending boundary of system frame N is t2. PUSCH scheduled by PDCCH is transmitted on system frame N. PUSCH is indicated as carrying the transmission time of the reference frame. The reference frame is system frame N on which PUSCH is transmitted. If the reference point is the starting boundary of the frame, the transmission time of the reference point is t1, and the value of t1 can be carried by PUSCH for transmission time reporting.

[0078] In some embodiments, the time interval between the second reference point and the PUCCH or PUSCH is equal to or greater than a threshold, wherein in some embodiments, the PUCCH or PUSCH carries the transmission time of the second reference point. In some embodiments, the time interval between the second reference point and the first symbol of the PUCCH or the first symbol of the PUSCH is equal to or greater than a threshold, wherein in some embodiments, the PUSCH or PUCCH carries the transmission time of the second reference point.

[0079] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates a transmission time when the PUSCH carries a second reference point. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the transmission time. The transmission time may be carried by the PUSCH or the PUCCH. In some embodiments, the reference unit is a unit before or after a unit on which the DCI or MAC CE is transmitted, with a first offset between the two. In some embodiments, the first offset is configured by the network or predefined by the specification. In some embodiments, the wireless communication device receives a third signal from the wireless communication node on a third time domain unit. In some embodiments, the third signal is configured to trigger the transmission of the second signal. In some embodiments, the third signal includes at least one of downlink control information (DCI) and a MAC CE. In some embodiments, each of the first, second, and third time domain units includes at least one of the following: symbol, subslot, time slot, subframe, frame. In some embodiments, there is a first time offset between the first time domain unit and the third time domain unit. In some embodiments, the first time offset is preconfigured or indicated by the wireless communication node.

[0080] In some embodiments, the UE sends a transmission time of the second reference point to the network at a specific time. In some embodiments, the second reference point is before the specific time, wherein there is a second offset between the first reference point and the specific time. In some embodiments, the second offset is constant and can be configured by the network or predefined by the specification.

[0081] In some embodiments, the UE sends a transmission time of the second reference point to the network. In some embodiments, the transmission time of the second reference point is carried by an uplink transmission. In some embodiments, the uplink transmission is a PUCCH or a PUSCH. In some embodiments, the reference unit precedes or follows the uplink transmission, wherein there is a second offset between the reference unit and the first unit of the uplink transmission. In some embodiments, the second offset is configured by the network or predefined by a specification. In some embodiments, there is a second time offset between the first time domain unit and the second time domain unit on which the second signal is transmitted. In some embodiments, the second time offset is preconfigured or indicated by the wireless communication node.

[0082] When the network receives the transmission time from the UE, the network can obtain the time when the network receives the second reference point. In some embodiments, the time when the network receives the second reference point is the transmission time reported by the UE plus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time.

[0083] In some embodiments, the physical signal configuration is configured by the network to the UE. The network configures the physical signal configuration to be used for uplink synchronization so that the network obtains a clock. In some embodiments, the UE sends a physical signal (e.g., a reference physical signal) to the network. The UE sends the transmission time of the third reference point to the network. The third reference point is the start or end boundary of the first or last unit of the physical signal. For example, the third reference point is the first or last symbol, subslot, time slot, subframe, and frame of the physical signal.

[0084] In some embodiments, the reference physical signal is a physical signal transmitted by the UE at a time adjacent to (e.g., before and closest to) the transmission time sent by the UE to the network. In some embodiments, the reference physical signal is indicated to the network by the UE via RRC signaling, MAC CE or UCI.

[0085] In some embodiments, the physical signal is a PRACH. In some embodiments, the transmission time is transmitted in msg3. In some embodiments, the transmission time is carried by PUSCH in msgA. In some embodiments, the time interval between PRACH and PUSCH in msgA is equal to or greater than a threshold. In some embodiments, the transmission of PRACH and the reporting of the transmission time are triggered by DCI or MAC CE.

[0086] In some embodiments, the physical signal is a sounding reference signal (SRS). The reference SRS is indicated by the network. In some embodiments, the DCI schedules PUSCH transmission and triggers SRS transmission. In some embodiments, the SRS transmission is before the PUSCH transmission. In some embodiments, the transmission time of the SRS is transmitted in the PUSCH. In some embodiments, the first signal includes at least one of the following: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), a physical random access channel (PRACH) signal, or a sounding reference signal (SRS).

[0087] When the network receives the transmission time sent by the UE, the network can obtain the accurate time when the network receives the third reference point. In some embodiments, the time when the network receives the third reference point is the transmission time reported by the UE plus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time. The advance time is estimated (e.g., measured, determined) based on the reference PRACH. The advance time is estimated (e.g., measured, determined) based on the reference SRS.

[0088] In some embodiments, the first UE sends the transmission time of the fourth reference point to the second UE via the side link. The transmission time may be carried by a physical side link shared channel (PSSCH) or a physical side link control channel (PSCCH). In some embodiments, the transmission time of the fourth reference point is the time when the first UE sends the fourth reference point to the second UE. In some embodiments, the fourth reference point is the starting boundary or the ending boundary (e.g., symbol, subslot, time slot, subframe or frame) of the side link transmission. In some embodiments, if the fourth reference point is the starting boundary of the side link transmission, the first or more symbols of the side link transmission are transmitted from the first UE to the second UE. In some embodiments, if the fourth reference point is the ending boundary of the side link transmission, the last one or more symbols of the side link transmission are transmitted from the first UE to the second UE.

[0089] In some embodiments, the first UE sends the reception time of the fourth reference point to the second UE via the side link. The reception time may be carried by the PSSCH or the PSCCH. In some embodiments, the reception time of the fourth reference point is the time when the first UE receives the fourth reference point from the second UE. In some embodiments, if the fourth reference point is the starting boundary of the side link transmission, the first one or more symbols of the side link transmission are transmitted from the second UE to the first UE. In some embodiments, if the fourth reference point is the ending boundary of the side link transmission, the last one or more symbols of the side link transmission are transmitted from the second UE to the first UE.

[0090] In some embodiments, the side link transmission is a transmission of a reference symbol, a reference subslot, a reference slot, a reference subframe, or a reference frame. In some embodiments, the reference symbol, the reference subslot, the reference slot, the reference subframe, or the reference frame is indicated to the first UE and the second UE by the network via RRC signaling or MAC CE or downlink control information (DCI). In some embodiments, the network indicates to the UE a first reference point for receiving a time report.

[0091] In some embodiments, the reference symbol, reference subslot, reference slot, reference subframe or reference frame is indicated by the first UE to the second UE via RRC signaling or MAC CE or downlink control information (DCI). In some embodiments, the first UE indicates to the second UE a first reference point for receiving a time report.

[0092] In some embodiments, the reference symbol, reference subslot, reference slot, reference subframe or reference frame is indicated by the second UE to the first UE via RRC signaling or MAC CE or downlink control information (DCI). In some embodiments, the second UE indicates to the first UE a first reference point for receiving a time report.

[0093] When the second UE receives the transmission time or the reception time from the first UE, the second UE can obtain the time when the UE receives or sends the fourth reference point. In some embodiments, the time when the UE receives or sends the fourth reference point is the transmission time or reception time sent by the first UE.

[0094] Fig.13 FIG. 1 is a flow chart illustrating a method 1300 for transmitting timing information according to some embodiments of the present disclosure. Figure 1-12 In some embodiments, the method 1300 may be performed by a wireless communication device (eg, a UE). Depending on the embodiment, additional, fewer, or different operations may be performed in the method 1300.

[0095] The wireless communication device receives a first signal from a wireless communication node (e.g., a network) in a first time domain unit (1302). The wireless communication device transmits a second signal to the wireless communication node in a second time domain unit, the second signal carrying time information indicating when the wireless communication device received the first signal (1304).

[0096] Fig.14 A flow chart showing a method 1400 for transmitting timing information according to some embodiments of the present disclosure is shown. Figure 1-12 In some embodiments, the method 1400 may be performed by a wireless communication device (eg, a UE). Depending on the embodiment, additional, fewer, or different operations may be performed in the method 1400.

[0097] The wireless communication device transmits a first signal transmitted in a first time domain unit to a wireless communication node (e.g., a network) (1402). The wireless communication device transmits a second signal in a second time domain unit to the wireless communication node, the second signal carrying time information indicating when the wireless communication device transmitted the first signal (1404).

[0098] In some embodiments, the network receives from the UE a reception time (e.g., a first time, a first time value, a first time domain unit) of a first reference point (e.g., a first signal) received by the UE. The reception time of the first reference point is the time when the UE receives the first reference point from the network. The first reference point may be (e.g., identified as, occurring during, at the time of, etc.) at least one of a boundary (e.g., a start or end boundary) of a unit (e.g., a transmission, a transmission unit) such as a symbol (e.g., an orthogonal frequency division multiplexing (OFDM) symbol), a subslot, a slot, a subframe, or a frame (e.g., a system frame). The unit corresponding to the first reference point may be referred to as a reference unit (e.g., a reference transmission, a reference transmission unit), such as a reference symbol, a reference subslot, a reference slot, a reference subframe, and a reference system frame. In other words, the symbol, subslot, slot, subframe, and system frame corresponding to the first reference point may be referred to as a reference symbol, a reference subslot, a reference slot, a reference subframe, and a reference system frame, respectively. In some embodiments, the wireless communication node sends a first signal on a first time domain unit to the wireless communication device. The wireless communication node receives a second signal on a second time domain unit from the wireless communication device, the second signal carrying time information indicating when the wireless communication device received the first signal. In some embodiments, the wireless communication node receives a first signal transmitted on a first time domain unit from the wireless communication device. The wireless communication node receives a second signal on a second time domain unit from the wireless communication device, the second signal carrying time information indicating when the wireless communication device transmitted the first signal. In some embodiments, the time information includes the time of a start boundary or an end boundary of the first time domain unit.

[0099] The reference symbol is a downlink (DL) symbol that is used for downlink signal transmission. If the first reference point is the end boundary of the reference unit, the last one or more symbols of the reference unit are downlink symbols used for downlink signal transmission. If the first reference point is the start boundary of the reference unit, the first one or more symbols of the reference unit are downlink symbols used for downlink signal transmission. In some embodiments, the network receives the reception time of the boundary of the reference unit from the UE.

[0100] The information of the reception time may be in radio resource control (RRC) signaling, or medium access control (MAC) control element (CE), or uplink control information (UCI). In some embodiments, the time information is included in at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0101] In some embodiments, the reference unit is indicated by the network to the UE via RRC signaling or MAC CE or downlink control information (DCI). The network indicates to the UE a first reference point for receiving the time report. In some embodiments, the first time domain unit is indicated by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or downlink control information (DCI).

[0102] In some embodiments, the reference unit is indicated by the UE to the network via RRC signaling or MAC CE or UCI. The first reference point for receiving the time report is indicated by the UE to the network. In some embodiments, the first time domain unit is indicated by the wireless communication device via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0103] In some embodiments, the UE sends a reception time of the first reference point to the network at a specific (e.g., predetermined, occurring once per period of time, etc.) time. In some embodiments, the reception time received by the network is a reception time of the indicated first reference point adjacent to the specific time (e.g., before the specific time and closest to it among the reference points before that time). The reception time may be carried by (e.g., transmitted by, included in, allocated to, corresponding to, etc.) a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). The time carried by the PUSCH or PUCCH is a reception time of the indicated first reference point adjacent to (e.g., before and closest to the start of the PUSCH or PUCCH). In some embodiments, the second signal includes at least one of a physical uplink control channel (PUCCH) signal or a physical uplink shared channel (PUSCH) signal.

[0104] Return to reference Figure 4 , system frame 5 is indicated (e.g., by the network or UE) as a reference frame, and the first reference point is the starting boundary of the reference frame. Figure 4In the example, there are 4 system frames, and the system frame number is 5. The first system frame number 5 is received starting from t1. In other words, the reception time of the starting boundary of the first reference frame is t1. Similarly, the reception times of the starting boundaries of the second, third and fourth reference frames are t2, t3 and t4, respectively. In some embodiments, the UE sends the reception time of the first reference point to the network at t5. Since the reference point of the second reference frame (e.g., the starting boundary of the second reference frame) is before t5 and closest to t5, the reception time sent by the UE at t5 is the reception time of the starting boundary of the second reference frame (i.e., t2 is sent by the UE as the reception time).

[0105] In some embodiments, the first reference point configured by the network is periodic. After receiving the first reference point and before receiving the next first reference point, the UE sends the reception time of the first reference point to the network. The reception time reported by the UE is also periodic, with the same periodicity as the first reference point. In some embodiments, the wireless communication node transmits a first signal to the wireless communication device every specific time period. In some embodiments, the wireless communication node receives a second signal from the wireless communication device during each time period, and the second signal carries time information indicating when the wireless communication device received the first signal.

[0106] In some embodiments, the reference cells configured by the network are periodic. After receiving each reference cell and before receiving the next reference cell, the UE sends the reception time to the network. The reception time reported by the UE is periodic, with the same periodicity as the reference cell. For periodic reference cells, the periodicity and offset can be configured. The offset of the reference cell is the time interval between one of the reference cells and the starting point. Typically, the starting point is the beginning of system frame 0.

[0107] Now refer to Figure 5 , the offset is 10 frames, and the periodicity is 40 frames. The starting point is the beginning of system frame 0. Based on the offset and periodicity, Figure 5 The reference frames shown are system frame 10, system frame 50, system frame 90, and system frame 130. The starting boundaries of system frame 0, system frame 10, system frame 50, system frame 90, and system frame 130 are received at t1, t2, t3, t4, and t5, respectively. In some embodiments, the first reference point is the starting boundary of the reference frame.

[0108] For reference frame 10, after receiving frame 10 and before receiving frame 50, the UE sends the reception time of the starting boundary of frame 10 (i.e., t2) to the network. In another case, after t2 and before t3, the UE sends the reception time of the starting boundary of frame 10 (i.e., t2). Similarly, for reference frame 50, after receiving frame 50 and before receiving frame 90, the UE sends the reception time of the starting boundary of frame 50 (i.e., t3) to the network. In another case, after t3 and before t4, the UE sends the reception time of the starting boundary of frame 50 (i.e., t3).

[0109] In some embodiments, the reference unit, and, in some embodiments, the first reference point is implicitly indicated by the network. In some embodiments, the network sends downlink control information (DCI) for scheduling PUSCH to the UE, and in some embodiments, the DCI indicates that PUSCH is used to transmit the reception time. In some embodiments, the network sends a MAC CE to the UE, and the MAC CE indicates that the UE reports the reception time. In some embodiments, the reference unit is the first unit or the last unit on which the DCI or MAC CE is transmitted. For example, the reference symbol, subslot, slot, subframe and system frame are the first or last symbol, subslot, slot, subframe and frame on which the DCI or MAC CE is transmitted, respectively. In some embodiments, the DCI is carried by the PDCCH, and the MAC CE is carried by the PDSCH. The symbol, subslot, slot, subframe and frame on which the DCI is transmitted are respectively equal to the symbol, subslot, slot, subframe and frame of the PDCCH carrying the DCI. The symbol, subslot, slot, subframe and frame on which the MAC CE is transmitted are respectively equal to the symbol, subslot, slot, subframe and frame of the PDSCH carrying the MAC CE. In some embodiments, the wireless communication node transmits a third signal to the wireless communication device on a third time domain unit. In some embodiments, the third signal is configured to trigger the transmission of the second signal. In some embodiments, the third signal includes at least one of downlink control information (DCI) and MAC CE. In some embodiments, each of the first, second and third time domain units includes at least one of the following: symbol, subslot, slot, subframe, frame.

[0110] Now refer to Figure 6, receiving system frame N (N is an integer) starting from t1. The reception time of the starting boundary of system frame N is t1, and the reception time of the ending boundary of system frame N is t2. PDCCH is transmitted on system frame N to schedule PUSCH. PDCCH also indicates that PUSCH is used to transmit the reception time. Therefore, the reference frame is system frame N. If the reference point is the starting boundary of the frame, the report of the reception time of the reference point is t1 and the report of the value of t1 can be received by the network from the UE. If the reference point is the ending boundary of the frame, the report of the reception time of the reference point is t2 and the report of the value of t2 can be received by the network from the UE.

[0111] Now refer to Figure 7 , receiving system frame N starting from t1. The reception time of the starting boundary of system frame N is t1, and the reception time of the ending boundary of system frame N is t2. MAC CE is transmitted on system frame N, and MAC CE is used to indicate that the UE reports the reception time to the network. Therefore, the reference frame is system frame N. If the reference point is the starting boundary of the frame, the report of the reception time of the reference point is t1 and the value of t1 can be received by the network from the UE. If the reference point is the ending boundary of the frame, the report of the reception time of the reference point is t2 and the value of t2 can be received by the network from the UE.

[0112] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates the reception time at which the PUSCH is to be transmitted. In some embodiments, the time interval between the DCI and the scheduled PUSCH is equal to or greater than a threshold. In some embodiments, the time interval between the last symbol of the PDCCH carrying the DCI and the first symbol of the scheduled PUSCH is equal to or greater than a threshold.

[0113] In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the reception time. In some embodiments, the reception time is carried by PUSCH or PUCCH. In some embodiments, the time interval between the MAC CE and the PUSCH or PUCCH is equal to or greater than a threshold. In some embodiments, the time interval between the last symbol of the PDSCH carrying the MAC CE and the first symbol of the PUSCH or PUCCH is equal to or greater than a threshold. The value of the threshold may be configured by the network or predefined by the specification.

[0114] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates that the PUSCH is to transmit the reception time. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the reception time. In some embodiments, the reference symbol is a symbol before or after a symbol on which the DCI or MAC CE is transmitted, and there is a first offset between the two. In some embodiments, the reference unit is a unit before or after a unit on which the DCI or MAC CE is transmitted, and there is a first offset between the two. For example, the reference symbol, subslot, slot, subframe and frame are symbols, subslots, slots, subframes and frames before or after the corresponding symbols, subslots, slots, subframes and frames on which the DCI or MAC CE is transmitted, respectively, and the two have a first offset. The first offset is configured by the network or predefined by the specification. In some embodiments, there is a first time offset between the first time domain unit and the third time domain unit. In some embodiments, the first time offset is preconfigured or indicated by the wireless communication node.

[0115] Now refer to Figure 8 , receiving system frame 20 from t1. The reception time of the start boundary of system frame 20 is t1, and the reception time of the end boundary of system frame 20 is t2. The first offset is 3 frames. The PDCCH transmitted on frame 23 indicates that the UE reports the reception time. Since the offset between frame 20 and frame 23 is 3 frames, the reference frame is frame 20. . If the reference point is the start boundary of the reference frame, the reception time of the start boundary of system frame 20 (i.e., t1) is reported. If the reference point is the end boundary of the reference frame, the reception time of the end boundary of system frame 20 (i.e., t2) is reported.

[0116] In some embodiments, the UE sends a reception time of the first reference point to the network at a specific time. In some embodiments, the first reference point is before the specific time, wherein there is a second offset between the first reference point and the specific time. In some embodiments, the second offset is constant and can be configured by the network or predefined by the specification.

[0117] The network receives the reception time of the first reference point from the UE via an uplink transmission. The uplink transmission is a PUCCH or a PUSCH. In some embodiments, the reference unit is before or after the uplink transmission, wherein there is a second offset between the reference unit and the first unit of the uplink transmission. For example, the reference symbol, sub-time slot, time slot, subframe and frame are before or after the uplink transmission, wherein there is a second offset between the reference symbol, sub-time slot, time slot, subframe and frame and the first symbol, sub-time slot, time slot, subframe and frame of the uplink transmission, respectively. The second offset can be a plurality of symbols, sub-time slots, time slots, subframes, frames or milliseconds. In some embodiments, the second offset is configured by the network or predefined by the specification. The value of the offset can be zero. In some embodiments, there is a second time offset between the first time domain unit and the second time domain unit on which the second signal is transmitted. In some embodiments, the second time offset is preconfigured or indicated by the wireless communication node.

[0118] Now refer to Fig. 9 , system frame 15 is received starting from t1. The reception time of the start boundary of system frame 15 is t1, and the reception time of the end boundary of system frame 15 is t2. The end boundary of system frame 15 is the start boundary of system frame 16. The reception time of the end boundary of system frame 16 is t3. The PUSCH transmitted on system frame 16 carries the reception time. The PUSCH transmitted in system frame 16 is used to transmit the reception time. The offset between the reference frame and the frame of the PUSCH (i.e., system frame 16) is 1 frame. Therefore, the reference frame is system frame 15. If the reference point is the start boundary of the reference frame, the reception time of the start boundary of system frame 15 (i.e., t1) is transmitted in the PUSCH. If the reference point is the end boundary of the reference frame, the reception time of the end boundary of system frame 15 (i.e., t2) is transmitted in the PUSCH.

[0119] When the network receives the reception time from the UE, the network can obtain the time when the network sent the first reference point. In some embodiments, the time when the network sent the first reference point is the reported reception time received by the network minus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time.

[0120] In some embodiments, the network receives a transmission time of a second reference point from the UE. The transmission time of the second reference point is the time when the UE transmits the reference point to the network. The second reference point may be at least one of the boundaries (e.g., a start or end boundary) of a unit such as a symbol, a subslot, a time slot, a subframe, or a frame. The unit corresponding to the second reference point may be referred to as a reference unit, such as a reference symbol, a reference subslot, a reference time slot, a reference subframe, and a reference system frame. In some embodiments, a wireless communication node receives a first signal transmitted on a first time domain unit from a wireless communication device. The wireless communication node receives a second signal from the wireless communication device on a second time domain unit, the second signal carrying time information indicating when the wireless communication device transmitted the first signal. In some embodiments, the time information includes the time of the start boundary or the end boundary of the first time domain unit.

[0121] The reference symbol is an uplink symbol that is used for uplink signal transmission. If the second reference point is the end boundary of the reference unit, the last one or more symbols of the reference unit are uplink symbols used for uplink signal transmission. If the second reference point is the start boundary of the reference unit, the first one or more symbols of the reference unit are uplink symbols used for uplink signal transmission. In some embodiments, the network receives the transmission time of the start or end boundary of the reference unit from the UE.

[0122] The information of the transmission time may be in RRC signaling, or MAC CE, or UCI. In some embodiments, the time information is included in at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE), or uplink control information (UCI).

[0123] In some embodiments, the reference unit is indicated by the network to the UE via RRC signaling, MAC CE or DCI. In some embodiments, the second reference point for transmitting the time report is indicated by the network to the UE. In some embodiments, the first time domain unit is indicated by the wireless communication node via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or downlink control information (DCI).

[0124] In some embodiments, the reference unit is indicated by the UE to the network via RRC signaling, MAC CE or UCI. In some embodiments, the second reference point for transmitting the time report is indicated by the UE to the network. In some embodiments, the first time domain unit is indicated by the wireless communication device via at least one of radio resource control (RRC) signaling, medium access control (MAC) control element (CE) or uplink control information (UCI).

[0125] The UE sends a transmission time of the second reference point to the network at a specific time. In some embodiments, the transmission time received by the network is the transmission time of the indicated second reference point adjacent to (e.g., before and closest to) the specific time. The transmission time may be carried by PUSCH or PUCCH. In some embodiments, the transmission time carried by PUSCH or PUCCH is the transmission time of the indicated second reference point before and closest to the start of PUSCH or PUSCH.

[0126] Now refer to Fig.10 , system frame No. 5 is indicated as the reference frame. The second reference point is the end boundary of the reference frame. There are 4 system frames, and the system frame number is 5. The first system frame No. 5 is transmitted with t1 as the end boundary. Therefore, the transmission time of the end boundary of the first reference frame is t1. Similarly, the transmission time of the end boundary of the second reference frame is t2. The transmission time of the end boundary of the third reference frame is t3. The transmission time of the end boundary of the fourth reference frame is t4. The UE sends the transmission time of the second reference point to the network at t5. Since the reference point of the second reference boundary (e.g., the end boundary of the second reference frame) is before t5 and closest to t5, the transmission time sent by the UE at t5 is the transmission time of the end boundary of the second reference frame (i.e., t2 is received by the network as the reception time).

[0127] In some embodiments, the second reference point configured by the network is periodic. After transmitting each second reference point and before transmitting the next second reference point, the UE sends the transmission time of the second reference point to the network. The transmission time reporting performed by the UE is also periodic, with the same periodicity as the second reference point.

[0128] In some embodiments, the reference symbol, reference unit configured by the network is periodic. After transmitting each reference unit and before transmitting the next reference unit, the UE sends the transmission time to the network. The transmission time report performed by the UE is periodic and has the same periodicity as the reference unit. In some embodiments, the wireless communication node receives a first signal from the wireless communication device every specific time period. In some embodiments, the wireless communication node receives a second signal from the wireless communication device during each time period, and the second signal carries time information indicating when the wireless communication device transmitted the first signal.

[0129] Now refer to Fig.11 , the offset is 10 frames, and the periodicity is 40 frames. The starting point is the beginning of system frame 0. Based on the offset and periodicity, Fig.11The reference frames shown are system frame 10, system frame 50, system frame 90 and system frame 130. The starting boundaries of system frame 0, system frame 10, system frame 50, system frame 90 and system frame 130 are transmitted at t1, t2, t3, t4 and t5 respectively. In some embodiments, the second reference point is the starting boundary of the reference frame.

[0130] For reference frame 10, after transmitting frame 10 and before transmitting frame 50, the UE sends the transmission time of the starting boundary of frame 10 (i.e., t2) to the network. In another case, after t2 and before t3, the UE sends the transmission time of the starting boundary of frame 10 (i.e., t2). Similarly, for reference frame 50, after transmitting frame 50 and before transmitting frame 90, the UE sends the transmission time of the starting boundary of frame 50 (i.e., t3) to the network. In another case, after t3 and before t4, the UE sends the transmission time of the starting boundary of frame 50 (i.e., t3).

[0131] In some embodiments, the reference unit is implicitly indicated by the network, and in some embodiments, implicitly indicated by the first reference point.

[0132] In some embodiments, the network sends downlink control information (DCI) for scheduling PUSCH to the UE, and in some embodiments, the DCI indicates that PUSCH is used to transmit the transmission time. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the transmission time. The transmission time may be carried by PUSCH or PUCCH. In some embodiments, the reference unit is the first or last unit on which PUSCH or PUCCH is transmitted.

[0133] Now refer to Fig.12 , system frame N (N is an integer) is transmitted starting from t1. The transmission time of the starting boundary of system frame N is t1, and the transmission time of the ending boundary of system frame N is t2. PUSCH scheduled by PDCCH is transmitted on system frame N. PUSCH is indicated as carrying the transmission time of the reference frame. The reference frame is the system frame N on which the PUSCH is transmitted. If the reference point is the starting boundary of the frame, the transmission time of the reference point is t1, and the value of t1 can be carried by the PUSCH for transmission time reporting.

[0134] In some embodiments, the time interval between the second reference point and the PUCCH or PUSCH is equal to or greater than a threshold, wherein in some embodiments, the PUCCH or PUSCH carries the transmission time of the second reference point. In some embodiments, the time interval between the second reference point and the first symbol of the PUCCH or the first symbol of the PUSCH is equal to or greater than a threshold, wherein in some embodiments, the PUSCH or PUCCH carries the transmission time of the second reference point.

[0135] In some embodiments, the network sends a DCI for scheduling a PUSCH to the UE, and in some embodiments, the DCI indicates a transmission time when the PUSCH carries a second reference point. In some embodiments, the network sends a MAC CE to the UE, and in some embodiments, the MAC CE indicates that the UE reports the transmission time. The transmission time may be carried by the PUSCH or the PUCCH. In some embodiments, the reference unit is a unit before or after a unit on which the DCI or MAC CE is transmitted, with a first offset between the two. In some embodiments, the first offset is configured by the network or predefined by the specification. In some embodiments, the wireless communication node transmits a third signal to the wireless communication device on a third time domain unit. In some embodiments, the third signal is configured to trigger the transmission of the second signal. In some embodiments, the third signal includes at least one of downlink control information (DCI) and a MAC CE. In some embodiments, each of the first, second, and third time domain units includes at least one of the following: symbol, subslot, time slot, subframe, frame. In some embodiments, there is a first time offset between the first time domain unit and the third time domain unit. In some embodiments, the first time offset is preconfigured or indicated by the wireless communication node.

[0136] In some embodiments, the UE sends a transmission time of the second reference point to the network at a specific time. In some embodiments, the second reference point is before the specific time, wherein there is a second offset between the first reference point and the specific time. In some embodiments, the second offset is constant and can be configured by the network or predefined by the specification.

[0137] In some embodiments, the network receives a transmission time of the second reference point from the UE. In some embodiments, the transmission time of the second reference point is carried by an uplink transmission. In some embodiments, the uplink transmission is a PUCCH or a PUSCH. In some embodiments, the reference unit precedes or follows the uplink transmission, wherein there is a second offset between the reference unit and the first unit of the uplink transmission. In some embodiments, the second offset is configured by the network or predefined by a specification. In some embodiments, there is a second time offset between the first time domain unit and the second time domain unit on which the second signal is transmitted. In some embodiments, the second time offset is preconfigured or indicated by the wireless communication node.

[0138] When the network receives the transmission time from the UE, the network can obtain the time when the network receives the second reference point. In some embodiments, the time when the network receives the second reference point is the reported transmission time received by the network plus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time.

[0139] In some embodiments, the physical signal configuration is configured by the network to the UE. The network configures the physical signal configuration to be used for uplink synchronization so that the network obtains a clock. In some embodiments, the network receives a physical signal (e.g., a reference physical signal) from the UE. The network receives the transmission time of the third reference point from the UE. The third reference point is the start or end boundary of the first or last unit of the physical signal. For example, the third reference point is the first or last symbol, subslot, time slot, subframe, and frame of the physical signal.

[0140] In some embodiments, the reference physical signal is a physical signal transmitted by the UE at a time adjacent to (e.g., before and closest to) the transmission time sent by the UE to the network. In some embodiments, the reference physical signal is indicated to the network by the UE via RRC signaling, MAC CE or UCI.

[0141] In some embodiments, the physical signal is a PRACH. In some embodiments, the transmission time is transmitted in msg3. In some embodiments, the transmission time is carried by PUSCH in msgA. In some embodiments, the time interval between PRACH and PUSCH in msgA is equal to or greater than a threshold. In some embodiments, the transmission of PRACH and the reporting of the transmission time are triggered by DCI or MAC CE.

[0142] In some embodiments, the physical signal is a sounding reference signal (SRS). The reference SRS is indicated by the network. In some embodiments, the DCI schedules PUSCH transmission and triggers SRS transmission. In some embodiments, the SRS transmission is before the PUSCH transmission. In some embodiments, the transmission time of the SRS is transmitted in the PUSCH. In some embodiments, the first signal includes at least one of the following: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), a physical random access channel (PRACH) signal, or a sounding reference signal (SRS).

[0143] When the network receives the transmission time sent by the UE, the network can obtain the accurate time when the network receives the third reference point. In some embodiments, the time when the network receives the third reference point is the reported transmission time received by the network plus the propagation delay. In some embodiments, the propagation delay is half of the UE advance time. The advance time is estimated (e.g., measured, determined) based on the reference PRACH. The advance time is estimated (e.g., measured, determined) based on the reference SRS.

[0144] Fig.15 FIG. 1 is a flow chart illustrating a method 1500 for receiving timing information according to some embodiments of the present disclosure. Figure 1-12 In some embodiments, the method 1500 may be performed by a wireless communication node (eg, a network). Depending on the embodiment, additional, fewer, or different operations may be performed in the method 1500.

[0145] The wireless communication node transmits a first signal to a wireless communication device (e.g., UE) in a first time domain unit (1502). The wireless communication node receives a second signal from the wireless communication device in a second time domain unit, the second signal carrying time information indicating when the wireless communication device received the first signal (1504).

[0146] Fig.16 FIG. 1 is a flow chart illustrating a method 1600 for receiving timing information according to some embodiments of the present disclosure. Figure 1-12 In some embodiments, the method 1600 may be performed by a wireless communication node (eg, a network). Depending on the embodiment, additional, fewer, or different operations may be performed in the method 1600.

[0147] The wireless communication node receives a first signal transmitted in a first time domain unit from a wireless communication device (e.g., UE) (1602). The wireless communication node receives a second signal in a second time domain unit from the wireless communication device, the second signal carrying time information indicating when the wireless communication device transmitted the first signal (1604).

[0148] Although various embodiments of the present solution have been described above, it should be understood that they are presented by way of example only rather than by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the example features and functions of the present solution. However, these personnel will understand that the present solution is not limited to the illustrated example architectures or configurations, but may be implemented using a variety of alternative architectures and configurations. In addition, as will be understood by those of ordinary skill in the art, one or more features of an embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.

[0149] It should also be understood that any reference to an element herein using names such as "first," "second," etc. does not generally limit the number or order of those elements. Rather, these names may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not mean that only two elements are employed, or that the first element must precede the second element in some manner.

[0150] In addition, those of ordinary skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0151] It will also be understood by those of ordinary skill in the art that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination thereof), firmware, various forms of programs or design codes containing instructions (for convenience, referred to herein as "software" or "software modules"), or any combination of these technologies. In order to clearly illustrate the interchangeability of such hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps have been generally described above in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. A skilled technician may implement the described functionality in various ways for each specific application, but such implementation decisions do not result in a departure from the scope of the present disclosure.

[0152] In addition, it will be understood by those of ordinary skill in the art that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented within or performed by an integrated circuit (IC) including 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, or any combination thereof. The logic blocks, modules, and circuits may also include antennas and / or transceivers for communicating with various components within a network or within a device. The general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices for performing the functions described herein, for example, a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors combined with a DSP core, or a combination of any other suitable configuration.

[0153] If implemented in software, the function can be stored as one or more instructions or codes on a computer-readable medium. Therefore, the steps of the method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media include both computer storage media and communication media, and communication media include any media that enables a computer program or code to be transferred from one place to another. The storage medium can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include: RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer.

[0154] In this document, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. In addition, for the purpose of discussion, various modules are described as discrete modules; however, it will be apparent to one of ordinary skill in the art that two or more modules can be combined to form a single module that performs associated functions according to embodiments of the present solution.

[0155] In addition, memory or other storage devices and communication components can be used in embodiments of the present solution. It will be understood that, for the sake of clarity, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable functional distribution between different functional units, processing logic elements or domains can be used without departing from the present solution. For example, functionality that is described as being performed by a separate processing logic element or controller can be performed by the same processing logic element or controller. Therefore, reference to a specific functional unit is only a reference to a suitable device for providing the functionality, rather than an indication of a strict logical or physical structure or organization.

[0156] Various modifications to the embodiments described in the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but should be given the widest scope consistent with the novel features and principles disclosed herein, as set forth in the claims below.

Claims

1. A wireless communication method, comprising: Receiving, by the wireless communication device, a first signal from a wireless communication node over a first time domain unit; and The wireless communication device transmits a second signal to the wireless communication node on a second time domain unit, the second signal carrying time information indicating when the wireless communication device received the first signal, wherein the time information of the first signal is a reception time of the first signal adjacent to the start of the second signal.

2. The wireless communication method according to claim 1, wherein: The time information is included in at least one of the following: radio resource control RRC signaling, medium access control MAC control element CE, uplink control information UCI.

3. The wireless communication method according to claim 1, wherein: The time information includes the time of the start boundary or the end boundary of the first time domain unit.

4. The wireless communication method according to claim 1, further comprising: receiving, by the wireless communication device, a third signal from the wireless communication node over a third time domain unit, wherein the third signal is configured to trigger transmission of the second signal, The third signal includes at least one of the following: downlink control information DCI, MAC CE.

5. The wireless communication method according to claim 4, wherein: Each of the first time domain unit, the second time domain unit and the third time domain unit includes at least one of the following: a symbol, a sub-slot, a time slot, a sub-frame, and a frame.

6. The wireless communication method according to claim 4, wherein: There is a first time offset between the first time domain unit and the third time domain unit.

7. The wireless communication method according to claim 6, wherein: The first time offset is preconfigured or indicated by the wireless communication node.

8. The wireless communication method according to claim 1, wherein: There is a second time offset between the first time domain unit and a second time domain unit over which the second signal is transmitted.

9. The wireless communication method according to claim 8, wherein: The second time offset is preconfigured or indicated by the wireless communication node.

10. The wireless communication method according to claim 1, further comprising: receiving, by the wireless communication device, the first signal from the wireless communication node every specific time period; and The second signal is transmitted by the wireless communication device to the wireless communication node during each time period, the second signal carrying time information indicating when the wireless communication device received the first signal.

11. The wireless communication method according to claim 1, wherein: The first time domain unit is indicated by the wireless communication node via at least one of the following: radio resource control RRC signaling, media access control MAC control element CE, and downlink control information DCI.

12. The wireless communication method according to claim 1, wherein: The first time domain unit is indicated by the wireless communication device via at least one of the following: radio resource control RRC signaling, medium access control MAC control element CE, and uplink control information UCI.

13. A wireless communication method, comprising: Transmitting, by the wireless communication device, a first signal transmitted on a first time domain unit to the wireless communication node; and The wireless communication device transmits a second signal to the wireless communication node on a second time domain unit, the second signal carrying time information indicating when the wireless communication device transmitted the first signal, wherein the time information of the first signal is a reception time of the first signal adjacent to the start of the second signal.

14. The wireless communication method according to claim 13, wherein: The time information is included in at least one of the following: radio resource control RRC signaling, medium access control MAC control element CE, uplink control information UCI.

15. The wireless communication method according to claim 13, wherein: The first signal includes at least one of the following: a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, a physical random access channel PRACH signal, and a sounding reference signal SRS.

16. The wireless communication method according to claim 13, wherein: The time information includes the time of the start boundary or the end boundary of the first time domain unit.

17. The wireless communication method according to claim 13, further comprising: receiving, by the wireless communication device, a third signal from the wireless communication node over a third time domain unit, wherein the third signal is configured to trigger transmission of the second signal, The third signal includes at least one of the following: downlink control information DCI and MAC CE.

18. The wireless communication method according to claim 13, wherein: Each of the first time domain unit, the second time domain unit and the third time domain unit includes at least one of the following: a symbol, a sub-slot, a time slot, a sub-frame, and a frame.

19. The wireless communication method according to claim 17, wherein: There is a first time offset between the first time domain unit and the third time domain unit.

20. The wireless communication method according to claim 19, wherein: The first time offset is preconfigured or indicated by the wireless communication node.

21. The wireless communication method according to claim 13, wherein: There is a second time offset between the first time domain unit and a second time domain unit over which the second signal is transmitted.

22. The wireless communication method according to claim 21, wherein: The second time offset is preconfigured or indicated by the wireless communication node.

23. The wireless communication method according to claim 13, further comprising: The wireless communication device transmits the first signal to the wireless communication node every specific time period; and The second signal is transmitted by the wireless communication device to the wireless communication node during each time period, the second signal carrying time information indicating when the wireless communication device transmitted the first signal.

24. The wireless communication method according to claim 13, wherein: The first time domain unit is indicated by the wireless communication node via at least one of the following: radio resource control RRC signaling, media access control MAC control element (CE), and downlink control information DCI.

25. The wireless communication method according to claim 13, wherein: The first time domain unit is indicated by the wireless communication device via at least one of the following: radio resource control RRC signaling, medium access control MAC control element CE, and uplink control information UCI.

26. A wireless communication device, comprising a processor and a memory, wherein: The processor is configured to read code from the memory and implement the method according to any one of claims 1 to 25.

27. A computer program product comprising computer readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the method according to any one of claims 1 to 25.

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