WO2019214577A1

WO2019214577A1 - Signal transmission method and device

Info

Publication number: WO2019214577A1
Application number: PCT/CN2019/085667
Authority: WO
Inventors: 吴霁; 张佳胤; 朱俊
Original assignee: 华为技术有限公司
Priority date: 2018-05-11
Filing date: 2019-05-06
Publication date: 2019-11-14

Abstract

A signal transmission method, related apparatus and system, the method comprising: performing LBT; after LBT succeeds, sending, on one or more time domain resources smaller than a time slot, an allowed mini-slot combination.

Description

Signal transmission method and device

This application claims the priority of the Chinese Patent Application submitted by the State Intellectual Property Office of China, Application No. 201810451022.8, and the invention name "Signal Transmission Method, Device" on May 11, 2018, and the request is submitted on July 19, 2018. The priority of the Chinese Patent Application No. 201810797873.8, entitled "Signal Transmission Method, Apparatus", the entire contents of which is hereby incorporated by reference.

Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a signal transmission method and apparatus.

Background technique

Devices operating in unlicensed bands can detect whether the channel is idle and access the channel for operation without authorization. In order to ensure coexistence and fairness with other devices operating in unlicensed bands, the R13 version of 3GPP specifies a channel contention access mechanism using LBT (Listen-Before-Talk).

An eNB operating in an unlicensed band may start the LBT at any time, and the LBT may end at any time due to the occurrence of interference and duration uncertainty of other systems. How to effectively utilize the time domain resources after successful LBT is a concern of this application.

Summary of the invention

The present application provides a signal transmission method, which can be applied to uplink or downlink, including performing LBT; after the LBT is successful, transmitting the allowed mini-slot on one or more time domain resources of less than one slot slot. Combination; the starting symbol position of each mini-slot in the allowed mini-slot combination, denoted as the first set of symbol positions. Preferably, each of the mini-slots includes a control resource set CORESET that carries control signaling, where the control signaling includes: a first common control signaling, where the first common control signaling is used to indicate a configuration of the MCOT. Information; or other control signaling.

Preferably, the first set of symbol positions is one or more of the following set of symbol positions: {1, 3, 7}, {3, 7, 10}, {3, 7}, {7, 10 },{5,7,12},{5,7},{7,12}. Generally, after the LBT succeeds, it is also possible to send on one or more 14-symbol time domain resources: a complete slot or a combination of other mini-slots, each of the other mini-slot combinations The starting symbol position of the mini-slot is recorded as a second set of symbol positions; preferably, the second set of symbol positions is different from the first set of symbol positions. However, the second set of symbol positions may also differ from the first set of symbol positions. Preferably, the method further comprises: transmitting an indication of a starting position of the maximum channel occupation time MCOT. The communication resources can be utilized efficiently and the processing complexity on the receiving side can be reduced.

In other aspects, an apparatus that can perform the above method is provided, and in addition, a transmitting method and apparatus on the receiving side are also provided.

On the other hand, the downlink only method, on the network side, includes: after the LBT succeeds, transmitting a control resource set CORESET on one or more time domain resources of less than one slot slot; the CORESET is located in a specified The symbol position of the CORESET is allowed to be transmitted; (101) the CORESET scheduled data is transmitted (102) according to the CORESET. The communication resources can be utilized efficiently and the processing complexity on the receiving side can be reduced.

Preferably, the specified symbol position that allows the CORESET to be carried is recorded as a first set of symbol positions, which is one or more of the following set of symbol positions: {1, 3, 7}, {3, 7, 10}, {3, 7}, {7, 10}, {5, 7, 12}, {5, 7}, {7, 12}. When the first set of symbol locations is plural, the method further includes: transmitting an indication of the currently used first set of symbol locations. In addition, after the LBT succeeds, the other CORESETs and the data scheduled by the other CORESETs may be sent and sent on the time domain resources of the one or more complete slots, where the symbol positions of the other CORESETs are recorded as the second symbol positions. Preferably, the second set of symbol positions is different from the first set of symbol positions. Further, the second set of symbol positions is a standard set of symbol positions. Additionally, the method can also include transmitting an indication of a starting location for the MCOT.

On the other hand, the present application also provides a corresponding processing method on the terminal side, which performs CORESET detection at a specified symbol position that allows CORESET to be carried, and may not perform detection at other locations, thereby saving resources and saving power.

Correspondingly, the present application provides a device on the network side, including devices such as devices or boards, and terminal devices, including terminals, chips, or other possible devices.

In other aspects, a communication system is provided, the communication system comprising: a network device and a terminal, wherein: the network device can be the aforementioned network device. The terminal mentioned above by the terminal.

In other aspects, a computer readable storage medium is provided having instructions stored thereon that, when executed on a computer, cause the computer to perform the signal transmission methods described above.

In other aspects, a computer program product comprising instructions for causing a computer to perform the signal transmission method described above is provided when it is run on a computer.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings to be used in the embodiments of the present application or the background art will be described below.

1 is a schematic structural diagram of a wireless communication system provided by the present application;

2 is a schematic diagram of a hardware architecture of a terminal device according to an embodiment of the present application;

3 is a schematic diagram of a hardware architecture of a network device according to an embodiment of the present application;

4A-4B are schematic diagrams of a Type A/Type B multi-carrier LBT mechanism involved in the present application;

FIG. 5 is a schematic diagram of a structure of a slot frame conforming to LTE according to the present application;

FIG. 6 is a schematic diagram of a structure corresponding to a micro-slot frame in an NR according to the present application;

7a, 7b, 7c and 7d are schematic diagrams showing the flow of the method involved in the present application;

8, 8a is a possible starting point example 1 corresponding to the non-complete slot scheduling supported by the NR-U communication system provided by the present application;

9 is a second example of a possible starting point corresponding to a non-complete slot scheduling supported by the NR-U communication system provided by the present application;

10 is a functional block diagram of a wireless communication system, a terminal, and a network device provided by the present application.

detailed description

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

Referring to Figure 1, there is shown a wireless communication system 100 to which the present application relates. The wireless communication system 100 can operate in a licensed band or in an unlicensed band. As can be appreciated, the use of unlicensed frequency bands can increase the system capacity of the wireless communication system 100. As shown in FIG. 1, the wireless communication system 100 includes: one or more base stations 101, such as network devices (such as gNBs), eNodeBs or WLAN access points, one or more terminals (Terminal) 103, and Core network 115. among them:

Network device 101 can be used to communicate with terminal 103 under the control of a network device controller (e.g., a base station controller) (not shown). In some embodiments, the network device controller may be part of the core network 115 or may be integrated into the network device 101.

The network device 101 can be used to transmit control information or user data to the core network 115 via a blackhaul interface (e.g., S1 interface) 113.

Network device 101 can communicate wirelessly with terminal 103 via one or more antennas. Each network device 101 can provide communication coverage for each respective coverage area 107. The coverage area 107 corresponding to the access point may be divided into a plurality of sectors, wherein one sector corresponds to a part of coverage (not shown).

The network device 101 and the network device 101 can also communicate with each other directly or indirectly via a blackhaul link 211. Here, the backhaul link 111 may be a wired communication connection or a wireless communication connection.

In some embodiments of the present application, the network device 101 may include: a base transceiver station (Base Transceiver Station), a wireless transceiver, a basic service set (BSS), and an extended service set (Extended Service Set, ESS). ), NodeB, eNodeB, network device (such as gNB) and so on. The wireless communication system 100 can include several different types of network devices 101, such as a macro base station, a micro base station, and the like. The network device 101 can apply different wireless technologies, such as a cell radio access technology, or a WLAN radio access technology.

Terminals 103 may be distributed throughout wireless communication system 100, either stationary or mobile. In some embodiments of the present application, the terminal 103 may include: a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, a user agent, a mobile client, and the like. In this application, a terminal can also be understood as a terminal device.

In the present application, the wireless communication system 100 may be an LTE communication system capable of operating in an unlicensed frequency band, such as an LTE-U system, or a new air interface communication system capable of operating in an unlicensed frequency band, such as an NRU system, or may be a future. Other communication systems operating in unlicensed bands.

Additionally, the wireless communication system 100 can also include a WiFi network.

Referring to Figure 2, there is shown a terminal 300 provided by some embodiments of the present application. As shown in FIG. 2, the terminal 300 may include: an input and output module (including an audio input and output module 318, a key input module 316, and a display 320, etc.), a user interface 302, one or more terminal processors 304, a transmitter 306, and a receiving The 308, the coupler 310, the antenna 314, and the memory 312. These components can be connected by bus or other means, and FIG. 2 is exemplified by a bus connection. among them:

Communication interface 301 can be used by terminal 300 to communicate with other communication devices, such as base stations. Specifically, the base station may be the network device 400 shown in FIG. Communication interface 301 refers to an interface between terminal processor 304 and a transceiver system (consisting of transmitter 306 and receiver 308), such as the X1 interface in LTE. In a specific implementation, the communication interface 301 may include: a Global System for Mobile Communication (GSM) (2G) communication interface, a Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and One or more of the Long Term Evolution (LTE) (4G) communication interfaces and the like may also be a communication interface of 4.5G, 5G or a future new air interface. Not limited to the wireless communication interface, the terminal 300 may be configured with a wired communication interface 301, such as a Local Access Network (LAN) interface.

The antenna 314 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. The coupler 310 is configured to divide the mobile communication signal received by the antenna 314 into multiple channels and distribute it to a plurality of receivers 308.

Transmitter 306 can be used to transmit signals to signals output by terminal processor 304, such as modulating the signal in a licensed band or modulating a signal in an unlicensed band.

Receiver 308 can be used to perform reception processing on the mobile communication signals received by antenna 314. For example, the receiver 308 can demodulate a received signal that has been modulated on an unlicensed band, and can also demodulate a received signal that is modulated on a licensed band.

In some embodiments of the present application, transmitter 306 and receiver 308 can be viewed as a wireless modem. In the terminal 300, the number of the transmitter 306 and the receiver 308 may each be one or more.

In addition to the transmitter 306 and the receiver 308 shown in FIG. 2, the terminal 300 may also include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like. Not limited to the above-described wireless communication signals, the terminal 300 can also support other wireless communication signals such as satellite signals, short-wave signals, and the like. Not limited to wireless communication, the terminal 300 may be configured with a wired network interface (such as a LAN interface) to support wired communication.

The input and output module can be used to implement interaction between the terminal 300 and the user/external environment, and can mainly include an audio input and output module 318, a key input module 316, a display 320, and the like. In a specific implementation, the input and output module may further include: a camera, a touch screen, a sensor, and the like. The input and output modules communicate with the terminal processor 304 through the user interface 302.

Memory 312 is coupled to terminal processor 304 for storing various software programs and/or sets of instructions. In particular implementations, memory 312 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory 312 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX. The memory 312 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices. The memory 312 can also store a user interface program, which can realistically display the content image of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .

In some embodiments of the present application, the memory 312 can be used to store an implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 300 side. For implementation of the signal transmission method provided by one or more embodiments of the present application, please refer to the subsequent embodiments.

Terminal processor 304 can be used to read and execute computer readable instructions. Specifically, the terminal processor 304 can be used to invoke a program stored in the memory 312, such as the implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 300 side, and execute the instructions contained in the program.

It can be understood that the terminal 300 can be the terminal 103 in the wireless communication system 100 shown in FIG. 1, and can be implemented as a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, and a user agent. , mobile client and more.

It should be noted that the terminal 300 shown in FIG. 2 is only one implementation of the present application. In an actual application, the terminal 300 may further include more or fewer components, which are not limited herein.

Referring to FIG. 3, FIG. 3 illustrates a network device 400 provided by some embodiments of the present application. As shown in FIG. 3, network device 400 can include a communication interface 403, one or more base station processors 401, a transmitter 407, a receiver 409, a coupler 411, an antenna 413, and a memory 405. These components can be connected by bus or other means, and FIG. 3 is exemplified by a bus connection. among them:

Communication interface 403 can be used by network device 400 to communicate with other communication devices, such as terminal devices or other base stations. Specifically, the terminal device may be the terminal 300 shown in FIG. 2. Communication interface 301 refers to an interface between base station processor 401 and a transceiver system (consisting of transmitter 407 and receiver 409), such as the S1 interface in LTE. In a specific implementation, the communication interface 403 may include: a Global System for Mobile Communications (GSM) (2G) communication interface, a Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and a Long Term Evolution (LTE) (4G) communication interface, etc. One or several of them may also be a communication interface of 4.5G, 5G or a new air interface in the future. Not limited to the wireless communication interface, the network device 400 may also be configured with a wired communication interface 403 to support wired communication. For example, the backhaul link between one network device 400 and other network devices 400 may be a wired communication connection.

The antenna 413 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. The coupler 411 can be used to divide the mobile pass signal into multiple channels and distribute it to a plurality of receivers 409.

The transmitter 407 can be used to transmit a signal output by the base station processor 401, such as modulating the signal in a licensed band or modulating a signal in an unlicensed band.

The receiver 409 can be used to perform reception processing on the mobile communication signal received by the antenna 413. For example, the receiver 409 can demodulate a received signal that has been modulated on an unlicensed band, and can also demodulate a received signal that is modulated on a licensed band.

In some embodiments of the present application, transmitter 407 and receiver 409 can be viewed as a wireless modem. In the network device 400, the number of the transmitter 407 and the receiver 409 may each be one or more.

Memory 405 is coupled to base station processor 401 for storing various software programs and/or sets of instructions. In particular implementations, memory 405 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory 405 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux. The memory 405 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.

The base station processor 401 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and control the handoff of user equipment in the control area. In a specific implementation, the base station processor 401 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM) (for Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions), code conversion and sub-multiplexer (TCSM) (for multiplexing demultiplexing and code conversion functions) )and many more.

In the present application, base station processor 401 can be used to read and execute computer readable instructions. Specifically, the base station processor 401 can be used to invoke a program stored in the memory 405, for example, the implementation of the signal transmission method provided by one or more embodiments of the present application on the network device 400 side, and execute the instructions included in the program.

It can be understood that the network device 400 can be the network device 101 in the wireless communication system 100 shown in FIG. 1, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). , NodeB, eNodeB, etc. Network device 400 can be implemented as several different types of base stations, such as macro base stations, micro base stations, and the like. Network device 400 can apply different wireless technologies, such as cell radio access technology, or WLAN radio access technology.

It should be noted that the network device 400 shown in FIG. 3 is only one implementation of the present application. In actual applications, the network device 400 may further include more or fewer components, which are not limited herein.

In order to ensure coexistence with other devices operating in unlicensed bands, the NRU system adopts the LBT channel contention access mechanism, and the LBT process and parameters are specified in the R13 version of 3GPP. Figures 4A-4B illustrate two types of LBT listening mechanisms.

As shown in FIG. 4A, the Type A LBT device can perform independent backoff on multiple component carriers (CCs). When the backoff is completed on a certain carrier, the transmission is delayed to wait for other still backoffs. Member carrier. After all the LBT-enabled carriers are backed off, the device needs to perform an additional one-shot CCA (25us clear channel assessment) to ensure that all carriers are idle; if all carriers are idle, the eNB transmits simultaneously on the idle carriers.

As shown in FIG. 4B, the Type B LBT device performs backoff only on a selected component carrier, and performs one-shot CCA (25us clear channel assessment) on other component carriers when the backoff ends. If the component carrier is idle, data transmission is performed; if the component carrier is not idle, data transmission cannot be performed on the component carrier at this time.

As shown in FIGS. 4A-4B, the device performing LBT may be LTE LAA, WiFi, NRU or other communication device operating in an unlicensed frequency band. The interference received by the device in the LBT is from the WiFi system. In the actual scenario, the interference received by the LBT device may also come from the LTE LAA, NRU or other communication system operating in the unlicensed frequency band. limit.

Not limited to that shown in Figures 4A-4B, the LBT listening mechanism employed by the NR U system may also vary without affecting the implementation of the present application.

The frame structure applied in this application may be a frame structure of LTE or its evolved versions. For example, as shown in FIG. 5, a typical frame structure specified by LTE includes 14 OFDM symbols (hereinafter referred to as symbols) in a scheduling slot, and the first 1, 2 or 3 symbols carry control information. (DCI), after 11, 12 or -13 symbols carry data. In the new air interface NR, in order to improve the flexibility of system scheduling, a micro-slot is introduced, which may be 2, 4, or 7 OFDM symbols in length. In the example shown in FIG. 6, one slot contains three 4-sign long mini-slots and one 2-symbol long mini-slot. Of course, it can also be a combination of other mini-slots. In each mini-slot, the control resource set (CORESET) of the mini-slot is carried from the first n symbols of the first symbol, and is used to carry the scheduling information (DCI) of the mini-slot. Specifically, n is a natural number and is smaller than the number of symbols in the mini-slot. Preferably, n does not exceed 3.

Based on the foregoing embodiments of the wireless communication system 100, the terminal 300, and the network device 400 respectively, the present application provides a signal transmission method, which provides a technical solution for transmitting a control resource set and corresponding data on a time domain resource after successful LBT. A technical solution for detecting on the receiving side is provided.

Referring to FIG. 7a, on the transmitting side, it may be uplink or downlink, and mainly includes:

101a performs LBT. Specifically, it may be a network device or a user equipment UE.

102a, after the success of the LBT, transmitting a combination of allowed mini-slots on one or more time domain resources of less than one slot slot; the start of each mini-slot in the allowed mini-slot combination The symbol position is recorded as the first symbol position set.

Generally, after the LBT succeeds, it is also possible to send on one or more 14-symbol time domain resources: a complete slot or a combination of other mini-slots, each of the other mini-slot combinations The starting symbol position of the mini-slot is recorded as a second set of symbol positions; preferably, the second set of symbol positions is different from the first set of symbol positions. Optionally, the duration of the last non-complete slot of the uplink transmission resource configured by the UE is less than 14 symbols, and the non-complete slot includes multiple mini-slots, and the symbol position of each mini-slot is recorded as the third. A collection of symbol locations.

Specifically, according to the mini-slot structure described later, for downlink transmission, the embodiment of the present invention may also be described as:

101b. A configuration control resource set (CORESET); wherein, for a time domain resource of less than 1 slot slot, the control resource set (CORESET) is located at a specified symbol position that may (allow) bearer CORESET. The symbol position that allows CORESET can be specified by the standard.

102b. After the LBT succeeds, send one or more control signalings carried by the CORESET.

Compared with the complete slot, the above-mentioned time domain resources of less than 1 time slot may be referred to as non-slots. In the Maximum Channel Occupancy Time (MCOT) after the successful LBT, one or more complete slots may also be included. The MCOT is the maximum channel occupation time, that is, the maximum duration of time after the device LBT succeeds in running the occupied channel for transmission. For convenience of description, a time domain resource of less than 14 symbols (non-complete slot) relative to the slot boundary in the MCOT in the above MCOT is hereinafter referred to as a first time domain resource, one or more relative to a slot boundary. The time domain resource of 14 symbols (complete slot) is called the second time domain resource; the non-complete slot located at the end position in the MCOT is hereinafter referred to as the third time domain resource.

In addition, after the LBT succeeds, the other CORESETs and the data scheduled by the other CORESETs may be sent and sent on the time domain resources of the one or more complete slots, where the symbol positions of the other CORESETs are recorded as the second symbol positions. set.

The CORESET includes a common search space common search space and a UE-specific search space UE-specific search space. The common search space is used to carry common control signaling and/or UE-specific control signaling, and the UE-specific search space is used to carry UE-specific control signaling.

Optionally, the common control signaling includes a first common control signaling, where the first common control signaling is used to indicate configuration information of the MCOT, such as an MCOT remaining duration or an uplink and downlink configuration of the MCOT. Or, it may be understood that the first common control signaling is used to indicate configuration information of a channel Occupancy Time (COT), where the COT refers to a time when the device LBT can occupy the channel for transmission, which may be The network side is configured by control signaling, which is referred to as MCOT remaining duration in the foregoing embodiment.

Optionally, the common control signaling includes a second common control signaling, where the second common control signaling is used to indicate that the current time slot belongs to the first time domain resource, and the second time domain resource is still the MCOT tail part time slot. (called the third time domain resource).

Optionally, the common control signaling includes a third common control signaling, where the third common control signaling is used to indicate whether the current time slot belongs to the third time domain resource.

Optionally, the common control signaling includes a fourth common control signaling, where the fourth common control signaling is used to indicate a CORESET location of the next configuration.

Specifically, the standard may define one of the foregoing common control signalings, that is, it can efficiently indicate the set of symbol positions where the CORESET is located, thereby reducing the blind detection overhead of the UE.

It should be noted that the present application only relates to the time domain (ie, symbol symble) and does not involve the transmission mode in the frequency domain. In the frequency domain, it is also possible for CORESET to be located on a partial sub-band. The symbol position of the above call may be the same symbol position as the CORESET. At this time, the data is transmitted on other sub-bands at the same symbol position; The symbol position of the data called by the control signaling may also be the symbol position after the CORESET.

The symbol position of the above-mentioned standard for the specified bearer control information for the first time domain resource is hereinafter referred to as the first symbol position set.

The meanings of the symbol position, the symbol index, or the symbol number are substantially the same. For the convenience of description, the symbol position is taken as an example, and will not be described later.

Correspondingly, the receiving side,

201a, receiving signals,

202a. Processing the received signal according to a combination of allowed mini-slots on at least one or more time domain resources of less than 1 slot slot; each mini-slot in the allowed mini-slot combination The starting symbol position is recorded as the first symbol position set.

In general, the method further includes: receiving, on one or more 14-symbol time domain resources, a complete slot or a combination of other mini-slots, each mini-slot of the combination of the other mini-slots The starting symbol position is recorded as a second set of symbol positions. Preferably, the second set of symbol positions is different from the first set of symbol positions, and of course, may be the same.

The following behavior example, such as the UE or other device is the receiving side, referring to FIG. 7b, in this embodiment includes:

201b. Detect whether there is control signaling on the

symbol

0 or 0, 1 or 0, 1 and 2 in the slot. The method includes: common control signaling and/or UE-specific control signaling of a common search space, and UE-specific control signaling carried in a control resource set CORESET UE-specific search space;

202b. When the control signaling is not retrieved on symbol 0 or

symbol

0, 1 or

symbols

0, 1, and 2, in a time domain resource of less than 1 slot, at least in the first set of symbol locations Whether there is control signaling (202) on consecutive n symbols from each symbol, n is 1 or 2 or 3. For example, common control signaling and/or UE-specific control signaling of the common search space and UE-specific control signaling carried in the control resource set CORESET UE-specific search space. That is, control signaling detection is performed on at least the aforementioned first set of symbol locations on the first time domain resource.

In addition, after the LBT succeeds, the other CORESETs and the data scheduled by the other CORESETs may be sent and sent on the time domain resources of the one or more complete slots, where the symbol positions of the other CORESETs are recorded as the second symbol positions. set;

The specific detection process is generally performed sequentially on each symbol of the union of the first symbol position set and the second symbol position set. Preferably, if any one of the foregoing first, second, third and fourth common control signaling is sent in the embodiment, the detection overhead can be reduced to some extent.

Taking the first symbol position set {1, 3, 7} and the second symbol position set {0} as an example, the foregoing "sequential detection" process includes:

The UE first attempts to detect control signaling at symbol 0 (at the slot boundary). If no control signaling is detected, it will jump to symbol 1 to continue the detection. If symbol 1 has not been detected, it will jump to symbol 3 detection if symbol 3 If it is not detected yet, it jumps to the symbol 7 to detect again, and the UE does not blindly check the control signaling in other symbols to save energy.

If the first common control signaling is detected at symbol 0, determining the second time domain resource and/or the third time of the MCOT or COT duration according to the MCOT or the remaining duration of the COT carried by the first common control signaling The time domain resource (at this time, there is no possibility of having the first time domain resource), and the corresponding time domain resource location is detected according to the corresponding CORESET symbol position set.

Specifically, for the detection of the second time domain resource, the first symbol position set is not involved, and the detection is not performed on the first symbol position set {1, 3, 7}; the detection may be performed according to relevant standards, or the application is adopted. The second set of symbol positions in other embodiments is detected. For the third time domain resource, it is required to detect according to the union of the CORESET symbol position set corresponding to the first and second time domain resources. I will not repeat them later.

Alternatively, if the second common control signaling is detected at the symbol 0, the bearer according to the second common control signaling is used to indicate that the current time slot belongs to the second time domain resource or the third time domain resource, according to the current time. Each set of symbol locations corresponding to each time domain resource in which the slot is located performs control signaling detection.

Alternatively, if the third common control signaling is detected at symbol 0, it is determined according to the third common control signaling whether the current time slot belongs to the third time domain resource, and if it belongs to the third time domain resource, according to the first time The union of the set of CORESET symbol locations corresponding to the domain resource and the second time domain resource is detected for control signaling monitoring; if not belonging to the third time domain resource, the detection is performed according to the second set of symbol locations.

Alternatively, if the fourth common control signaling is detected at symbol 0, control signaling detection is performed at the symbol position where the next CORESET indicated by the fourth common control signaling.

Alternatively, if control signaling is detected on symbol 0 (eg, located in the third time domain resource), but none of the first, second, third, and fourth common control signaling is detected, Equivalent to not detecting any signaling that facilitates subsequent CORESET monitoring, detecting based on the union of the first time domain resource and the CORESET symbol location set corresponding to the second time domain resource.

For the above-mentioned detection if jumping to symbol 1, and similarly using the above method on symbol 0, the information of the time domain resource will be different (the detections on

symbols

3 and 7 are similar to 1 and will not be described). :

If the first common control signaling is detected in the symbol 1, the first time domain resource and the second time domain resource in the duration of the MCOT or the COT are determined according to the MCOT or the COT related information carried by the first common control signaling. And / or third time domain resources, and detected in the corresponding time domain resource location according to the corresponding CORESET symbol location set.

Alternatively, if the second common control signaling is detected in the symbol 1, the second common control signaling is used to indicate that the current time slot belongs to the first time domain resource or the third time domain resource, according to the current time. Each set of symbol locations corresponding to each time domain resource in which the slot is located performs control signaling detection.

Alternatively, if the third common control signaling is detected at symbol 1, it is determined according to the third common control signaling whether the current time slot belongs to the third time domain resource. If it belongs to the third time domain resource, the control signaling is monitored according to the union of the first time domain resource and the CORESET symbol location set corresponding to the second time domain resource; if not belonging to the third time domain resource, the first A set of symbol locations is detected.

Alternatively, if the fourth common control signaling is detected at symbol 1, control signaling detection is performed at a symbol position where the next CORESET indicated by the fourth common control signaling is located.

Alternatively, if control signaling is detected on symbol 1 (eg, located in the third time domain resource), but none of the first, second, third, and fourth common control signaling is detected, Equivalent to not detecting any signaling that facilitates subsequent CORESET monitoring, detecting based on the union of the set of CORESET symbol locations corresponding to the first and second time domain resources.

For the above-mentioned process of jumping to the symbol 3 or the symbol 7 for detection, the similar method using the foregoing symbol 1 will not be described again.

In the foregoing example, the second symbol position set {0} is taken as an example. Alternatively, the second symbol position set may also have multiple symbols. The detection process on the symbols is similar to the detection process of the symbol 0 in the foregoing example, and is not Let me repeat.

It should be noted that when the second symbol position set and the first symbol position set have a common element I, the detection process for the element I is similar to the foregoing method. However, in the solution for transmitting the first common control signaling, the possibility of determining the time domain resource includes: any combination of the first time domain resource, the second time domain resource, and the third time domain resource. In the solution for transmitting the second common control signaling, the possibility of determining the time domain resource includes: a first time domain resource, a second time domain resource or a third time domain resource.

As described above, the second time domain resource indicated by each of the foregoing common control signaling does not involve the first symbol position set, and does not need to be detected on the first symbol position set {1, 3, 7}; The standard is tested or detected using a second set of symbol positions in other embodiments of the present application. For the third time domain resource, it is required to detect according to the union of the CORESET symbol position set corresponding to the first and second time domain resources. In this way, the overhead of detection can be saved, and the UE can reduce power consumption and increase the service life.

The solution provided by the present application is described in detail below through various aspects or embodiments.

(1) Frame structure on the incomplete slot of the MCOT or COT start or end

In steps 101a and 102a, 101b and 102b, each mini-slot in the mini-slot combination transmitted on the non-complete slot follows the structure of the specified mini-slot. The standard specifies the possible structure of the mini-slot, for example, the length is 2, 4 or 7, CORESET is in the first n symbol positions in each mini-slot (n is less than the mini-slot symbol length and the shorter of 3) ). Other structures or details of the mini-slot may continue to be specified in the standard and will not affect the implementation of this application.

In addition, in each embodiment, only the frame structure in the time domain is involved, and the transmission manner of the mini-slot and the slot in the frequency domain is not limited. For example, CORESET can be located only on a partial subband of the first n symbols.

The foregoing method may further include: on the sending side (the downlink network side or the uplink terminal side):

100. Optionally, one or more mini-slots to be sent are prepared, that is, one or more mini-slots are generated and cached. This step can be performed in parallel with the LBT process, or its time is not affected by the LBT. As long as the LBT is successful, there are enough mini-slots to be sent, saving some communication waiting time.

In order to achieve efficient communication efficiency, after the LBT is successful, one or more mini-slots should be used to fill all the symbol positions after the successful LBT and before the start of the first complete slot, ie the first symbol to the first one. At the end of the non-complete slot. Specifically, filling in the post-alignment manner can maximize the start of the structure of the next complete slot. Therefore, embodiments of the present application provide a possible (allowed) mini-slot combination of post-alignment, that is, specifying the location of the allowed CORESET.

In addition, on the receiving side, preferably, according to the pre-configured n, whether there is control signaling on consecutive n symbols from each of the first symbol position set and the second symbol position set.

In a specific example, on the receiving side, it is detected whether there is control signaling on the

symbol

0 or 0, 1 or 0, 1 and 2 in the slot; (201);

When the control signaling is not retrieved on symbol 0 or

symbol

0, 1 or

symbols

0, 1 and 2, in at least one time slot resource, at least in the first symbol position set Whether there is control signaling (202) on consecutive n symbols from the symbol, n is 1 or 2 or 3.

Before explaining the above-specified position of the allowed CORESET, the various possible mini-slot combinations on the non-complete slot and the corresponding symbol positions of the CORESET (the symbol positions at which the UE should be detected) are first introduced.

The first type of mini-slot combination and the symbol position that should be detected at least:

The white symbol in the figure indicates that the LBT has not passed at this time, the device cannot send data in the symbol; the diagonal line, the horizontal line, and the gray color respectively represent mini-slots of different lengths. Referring to FIG. 9, the gNB transmits up to one mini-slot each having a length of 2, 4, and 7 symbols in the slot, and the NR-U can support a total of seven non-slot based scheduling of different symbol starting points. The NR-U adopts the above method for non-complete slot scheduling, and all the possibilities for the UE to detect the symbol location set of the DCI are listed as follows:

1. NR-U supports non-complete slot scheduling with symbol starting point of 1. NR-U schedules up to 3 mini-slots of different lengths for transmission in non-complete slots:

gNB sends a 2 symbol, a 4 symbol and a 7 symbol mini-slot, the UE should be in the symbol {0,1,3,7} or {0,1,3,10} or {0,1,5,7 } or {0,1,5,12} or {0,1,8,12} or {0,1,8,10} for DCI detection, or at the intersection of the above symbols, ie the symbol {0,1,3, The DCI is detected on the first n symbols of 5, 7, 8, 10, 12} (Alternative 1 in Fig. 9).

2. NR-U schedules a mini-slot for transmission in a non-complete slot:

The gNB sends a 2-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 12} (Alternative 7 in Figure 9); or,

The gNB sends a 4-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 10} (Alternative 6 in Figure 9); or,

The gNB sends a 7-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting at the symbol {0, 7} (Alternative 4 in Figure 9).

3. NR-U schedules up to 2 mini-slots of different lengths for transmission in non-complete slots.

The gNB sends a 4-symbol and 7-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 3, 7} or {0, 3, 10}, or at the intersection of the two. That is, the DCI is detected on the n symbols starting from the symbol {0, 3, 7, 10} (Alternative 2 in Figure 9); or

The gNB sends a 2-symbol and a 7-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 5, 7} or {0, 5, 12}, or at the intersection of the two. That is, the DCI is detected on the n symbols starting from the symbol {0, 5, 7, 12} (Alternative 3 in Figure 9); or

The gNB sends a 2-symbol and 4-symbol mini-slot, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 8, 10} or {0, 8, 12}, or at the intersection of the two. That is, the DCI is detected on the n symbols starting from the symbol {0, 8, 10, 12} (Alternative 5 in Fig. 9).

The second type of mini-slot combination and the symbol position that should be detected at least:

Compared with the first class, the scheduling restriction is relaxed: gNB supports two mini-slots with a length of 2, 4, and 7 symbols in one slot (up to two for each length), and the gNB can be transmitted in a non-complete slot. Additional support for 3 different starting positions is shown in Figure 8.

Using the above method to NR-U in non-complete slot scheduling, the UE needs to detect the symbol location set of DCI. All possibilities are listed as follows:

1. NR-U schedules two mini-slots of the same length for transmission in a non-complete slot.

The gNB transmission data contains two 2-symbol mini-slots, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 10, 12}.

The gNB transmission data contains two 4-symbol mini-slots, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 6, 10} (as shown in Figure 10, Alternative 10).

The gNB transmission data contains two 7-symbol mini-slots, and the UE should perform DCI detection on the n symbols starting from the symbol {0, 7}.

2. The NR-U schedules two mini-slots of the same length and one mini-slot of different lengths for transmission in a non-complete slot.

The gNB sends data containing 2 2 symbols and 1 4 symbol mini-slot. The UE should be at the symbol {0,6,8,10} or {0,6,8,12} or {0,6,10,12 The DCI detection is performed on the first n symbols, or the DCI is detected on the n symbols starting from the intersection of the symbols, ie, the symbols {0, 6, 8, 10, 12}.

The gNB sends data containing 2 2 symbols and 1 7-symbol mini-slot. The UE should be in the symbol {0, 3, 5, 7} or {0, 3, 5, 12} or {0, 3, 10, 12 } Perform DCI detection, or detect DCI on the n symbols starting from the intersection of the above symbols, ie, the symbols {0, 3, 5, 7, 10, 12}.

The gNB sends data containing 2 4 symbols and 1 2 symbol mini-slot. The UE should be at the symbol {0,4,6,10} or {0,4,8,10} or {0,4,8,12 } Perform DCI detection, or detect DCI on the n symbols starting from the intersection of the above symbols, ie, the symbols {0, 4, 6, 8, 10, 12} (as in Alternative 9 in Figure 8).

3. NR-U schedules 4 mini-slots for data transmission in non-complete slots.

gNB sends data 2 2 symbols and 2 4 symbols mini-slot, UE should be in the symbol {0, 2, 4, 6, 10} or {0, 2, 4, 8, 10} or {0, 2, 4,8,12} or {0,2,6,10,12} or {0,2,6,8,12} or {0,2,6,8,10} starting from the n symbols The DCI detects, or detects the DCI at the intersection of the above symbols, ie, the symbols {0, 2, 4, 6, 8, 10, 12} (as shown in Figure 8 in Alternative 8).

(2) About the first symbol position set

Based on (a) possible mini-slot combinations, a portion thereof is preferred, and as the aforementioned first set of symbol positions, the standard may specify one or more of them. It will be different during the implementation process:

On the network side:

101-1. The standard defines only one set of first symbol positions. In other words, there is only one set of possible (allowed) combinations of mini-slots. Or, the standard directly defines the type, number, and location of allowed mini-slots in the first time domain resource. It can also be understood that the CORESET of each mini-slot may be at the n symbol positions starting from which symbols in the slot in which the first time domain resource is located.

101-2. The standard defines a plurality of first symbol position sets. That is to say, there are multiple sets of possible (allowed) combinations of mini-slots. In each first set of symbol positions, the possible symbol positions of the respective CORESETs are not identical. For example, in the examples 1 to 5 described later, any two or more symbol position sets in the example 7.

Specifically, in the solution of 101-2, the gNB may send RRC or other signaling, for explicitly or implicitly indicating to the UE, a first set of symbol locations used by the current network; so that the UE is used in the current network (configured The detection is performed at the symbol position. Each first set of symbol positions may have its own index index, or may be indicated by means of a bitmap, or may be multiplexed with other information in other manners. Obviously, the above steps are not needed in the 101.a scheme.

For example, a 14-bit bitmap is used to indicate that each bit corresponds to an OFDM symbol in the slot, and the value of the bit is "1", indicating that the UE needs to perform DCI blind detection at the symbol position. "0" indicates that the UE does not need to perform DCI blind detection at the symbol position, and may also indicate that the "0" indicates that the UE needs to perform DCI blind detection at the symbol position, and "1" indicates that the UE is at the symbol position. No DCI blind inspection is required.

For another example, when the first symbol position set is limited, if the NR-U only supports detection at position 0, only 1 bit is needed when the {3, 7} or {3, 7, 10} symbol position sets are combined. It can indicate the DCI blind check configuration that the UE should use.

A preferred first set of symbol locations includes, but is not limited to:

Example 1, {1, 3, 7}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on the symbol {1, 3, 7}. That is, the receiving side can detect whether there is CORESET on only 4 symbols, and these 4 symbols are 0, 1, 3, 7.

Example 2, {3, 7, 10}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on the symbol {3, 7, 10}. Its meaning is not described.

Example 3, {3, 7}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on symbol {3, 7}.

Example 4, {7, 10}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on symbol {7, 10}.

Example 5, {5, 7, 12}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on the symbol {5, 7, 12}.

Example 6, {5, 7}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on symbol {5,7};

Example 7, {7, 12}:

When there is no CORESET on symbol 0, it is only possible to carry CORESET on symbol {7, 12}.

In the above embodiment, the information to be transmitted is also carried on the non-complete slot after the successful LBT, and the resource can be utilized efficiently. On the other hand, the scheme of carrying the CORESET on each symbol in the non-complete slot can simplify the transmission process by specifying the symbol position that may carry the CORESET. Accordingly, the blind detection CORESET on the receiving side can be simplified. the complexity.

(3) Frame structure on the complete slot

As mentioned in the schemes of the foregoing 101a-102a, 101b-102b, in the MCOT after successful LBT, one or more time domain resources (14 symbols) of complete slot length may be included. The complete 14 symbols can be either an existing slot frame structure or a combination of multiple mini-slots.

Preferably, after the LBT succeeds, other CORESETs and data scheduled by the other CORESETs are also sent on the time domain resources of one or more complete slots, and the symbol positions of the other CORESETs are recorded as the second symbols. a set of locations; the second set of symbol locations being different from the first set of symbol locations.

NR (3GPP R15) stipulates that the number of CORESETs in a complete slot is less than or equal to 3, and CORESET can be sent at any position. Therefore, for the complete slot scheduling gNB high probability will send CORESET at symbol 0, whether other positions send CORESET, and the number of CORESET is uncertain. On the receiving side, the detection of CORESET should be performed at least at symbol 0. When the above scheme is adopted, the second symbol position set has only {0}.

The complete slot in this embodiment follows the above provisions, and there may be further optimized implementations. For example, the standard may further specify a mini-slot of mini-slots allowed in the complete slot for the unlicensed spectrum.

For example, the network device side can use two 7-symbol mini-slots in a complete slot, ie it is only possible to carry CORESET on the symbol {0, 7}. Alternatively, three 4 symbols and a 2 symbol mini-slot can be used in the complete slot, ie it is only possible to carry CORESET on the symbol {0, 7} or the symbol {0, 2, 6, 10}. Correspondingly, on the terminal side, CORESET detection should be performed on at least the symbol {0, 7} or the symbol {0, 2, 6, 10}. The above set of symbols is the aforementioned second set of symbol positions for the complete slot.

The standard may define one of the above second set of symbol positions, or two or more. In a plurality of cases, the network device side may also send an indication of the current second set of symbol positions, so that the UE adopts the indicated second set of symbol positions for the complete slot.

(4) Other relevant information

Optionally, in the method of the foregoing 101a-102a, 101b-102b, for the downlink, the method further includes: 103, after the LBT succeeds, sending, to the UE, information for indicating (identifying) the starting position of the MCOT, for example, public information. . In a specific case, the MCOT starting position is the symbol position 0 in the slot, and the foregoing embodiment includes only the second time domain resource. The public information can be a common reference signal, such as DMRS or common control information, such as group common PDCCH. Steps 102 and 101 have no sequential relationship. The above public information is not carried on the aforementioned CORESET.

Correspondingly, for the downlink, the receiving side, optionally, 200, receiving information for indicating (identifying) the starting position of the MCOT. Combining the schemes in 101a-102a, 101b-102b, control aggregation is performed on the union of the first symbol location set and the second symbol location set, and the symbol located at the start position of the MCOT or the symbol subsequent thereto Detection.

In another alternative embodiment, step 103 above may not be included, in which case the receiving side shall perform CORESET detection on the union of the first set of symbol locations and the second set of symbol locations. At the symbol position outside the union, no detection is performed, thereby ensuring timely and accurate information acquisition on the one hand, and reducing the complexity of detection and reducing the loss.

The above information for indicating (identifying) the starting position of the MCOT may be a sequence. On the receiving side, the terminal first detects the foregoing sequence, obtains the starting position of the MCOT, and then performs detection according to the first symbol position set and the second symbol position set.

To make the invention clearer, reference is made to Figures 7c and 7d to provide an upstream embodiment.

The 100 gNB sends uplink transmission configuration information to the UE through RRC signaling and/or PDCCH, and the UE can perform PUSCH transmission in the configured time-frequency resource. Preferably, the uplink transmission configuration information includes: quantity information of one or more slots (complete 14 OFDM symbols). Based on the start position of the COT and the time when the LBT is successful, the time-frequency resource of the configuration may be less than the one or more slots configured in the time domain, that is, the UE performs uplink transmission. The time-frequency resource may be less than one slot slot, or may be greater than or equal to one slot slot.

On the transmitting side (UE), it mainly includes:

101c UE performs LBT;

After the LBT succeeds, the UE sends the allowed mini-slot combination in the scheduled or configured uplink time domain resource (that is, in the configured time domain resource, remaining time after the LBT succeeds); The starting symbol position of each mini-slot in the mini-slot combination is recorded as the first set of symbol positions.

Certainly, based on whether the transmitted initial OFDM symbol is at the boundary of the slot, the UE may also send only one or more complete slots. The method for transmitting only the complete slot is not described herein.

Specifically, according to the mini-slot structure described later, for uplink transmission, referring to FIG. 7d, the embodiment of the present invention may also be described as:

101d. Demodulation Reference Signal (DMRS) configured for performing uplink channel measurement; wherein, for a time domain resource of less than 1 slot, the DMRS is located at a specified possible (allowed) bearer symbol position on. That is, the DMRS signal is carried on the OFDM symbols that are allowed to carry the DMRS in each mini-slot according to the mini-slot combination that is allowed to be transmitted.

102d. After the success of the LBT, according to whether the starting position after the successful LBT is at the slot boundary, send a complete slot or one or more allowed mini-slot combinations.

Preferably, the PUSCH includes one or more mini-slots or slots, and carries the DMRS signal on the first OFDM symbol of the mini-slot or slot.

Compared with the complete slot, the above-mentioned time domain resources of less than 1 time slot may be referred to as non-slots. The UE may further include one or more complete slots in the uplink transmission time slot after the LBT succeeds. The duration that the UE allows the occupied channel to transmit after the LBT succeeds is configured by the gNB. For convenience of description, a time domain resource of less than 14 symbols (non-complete slot) relative to the slot boundary in the uplink transmission time slot in the above uplink transmission time slot is hereinafter referred to as a first time domain resource, one or more relative The time domain resource with a length of 14 symbols (complete slot) at the slot boundary is called a second time domain resource; a non-complete slot located at the end of the uplink transmission is hereinafter referred to as a third time domain resource.

The above 102d includes but is not limited to:

102d-1. After the LBT succeeds, one or more mini-slots, including DMRS and uplink data, are sent at the starting location.

102d-2, after the LBT succeeds, after one or more mini-slots of the starting position (or, when the starting position of the LBT succeeds is at the slot boundary), the UE may also be in one or more complete slots. The DMRS and the scheduled uplink data are sent on the time domain resource, and the symbol position where the DMRS is located is recorded as the second symbol position set.

102d-3, after the LBT succeeds, the UE may further send the DMRS and the scheduled uplink data on a non-complete slot at the end of the transmission, where the symbol position of the DMRS is recorded as a third symbol position set.

It should be noted that, as described above, each embodiment relates only to the time domain (ie, symbol symbol), and does not relate to the transmission mode in the frequency domain. In the frequency domain, it is also possible that the DMRS and the scheduled data are located on a partial subband, such as the above DMRS and the scheduled data are transmitted on different subbands in the same time slot.

The symbol position of the above-mentioned standard for the first time domain resource that is allowed to carry the DMRS is hereinafter referred to as the first symbol position set.

Correspondingly, referring to Figure 7c, on the receiving side (gNB),

201c, receiving signal

202c. According to the result of the UE LBT (successful time) in the UE uplink transmission resource configured before the gNB, according to the allowed mini-slot combination on one or more time domain resources of less than one slot slot. Processing the received signal; the symbol position of the DMRS in the allowed mini-slot combination is recorded as a first set of symbol positions.

Optionally, the method further includes: receiving, on one or more 14-symbol time domain resources, a complete slot or a combination of other mini-slots, where the DMRSs of the other mini-slots are located Recorded as a second set of symbol locations. Preferably, the second set of symbol positions is different from the first set of symbol positions, and of course, may be the same.

Optionally, the method further includes: receiving a combination of mini-slots on the last (or at the end) time domain resource of less than 14 symbols in the uplink transmission time slot, where the "last" mini-slot The symbol position of the combined DMRS is recorded as a third symbol position set. Preferably, the third symbol position set is different from the first symbol position set/second symbol position set, and of course, may be the same.

The above behavior example, for example, the gNB is the receiving side, and referring to FIG. 7d, the embodiment includes:

201d. In the first slot of the uplink transmission time slot configured by the gNB for the UE, if the UE LBT success time is within the slot, that is, when the start position of the uplink transmission of the UE is less than 14 symbols with respect to the slot boundary The gNB shall perform DMRS detection on each symbol of the first symbol position set to determine the mini-slot combination used by the UE to transmit the PUSCH. When the start position of the uplink transmission of the UE is equal to 14 symbols with respect to the slot, the gNB shall perform DMRS detection on each symbol on the first symbol position set and the second symbol set union to determine the UE used to transmit the PUSCH. Mini-slot/slot combination;

202d. In a plurality of slots in the uplink transmission time slot configured by the gNB for the UE, if the start position to the end position of the uplink transmission after the UELBT succeeds includes (crosses) two or more slot boundaries, the gNB is in the second time. When the DMRS is detected before the domain resource, the DMRS detection is performed on each symbol of the second symbol position set of the second time domain resource to determine the mini-slot combination used by the UE to transmit the PUSCH; if the UELBT succeeds after the uplink transmission When the boundary of the end position relative to the slot is less than 14 symbols, the gNB performs DMRS detection on each symbol of the first symbol position set or the third symbol position set of the slot to determine the mini-slot combination used by the UE to transmit the PUSCH. In a specific detection process, generally, the DMRS is sequentially detected on each of the symbols of the first symbol position set and/or the second symbol position set.

Taking the first symbol position set {1, 3, 7} and the second symbol position set {0} and the third symbol position set {0, 2, 6} as an example (as shown in FIG. 2), the foregoing “sequential detection” The process includes:

Specifically, for the detection of the first time domain resource, (the union of the first symbol location set and the second symbol location set), the gNB first attempts to detect the DMRS at symbol 0, and if no control signaling is detected, it will jump to The symbol 1 continues to detect, if the symbol 1 has not been detected, it jumps to the symbol 3 detection. If it has not been detected on the symbol 3, it jumps to the symbol 7 to detect again, and the UE does not blindly check the control signaling in other symbols to save energy.

Specifically, for the detection of the second time domain resource, the first symbol position set is not involved, and the detection is not performed on the first symbol position set {1, 3, 7}; the detection may be performed according to relevant standards (for example, detecting the slot) The first 1 or 2 or 3 OFDM symbols are detected, or the second set of symbol positions in other embodiments of the present application are used for detection. I will not repeat them later.

Specifically, for the detection of the third time domain resource, the first symbol position set and the second symbol position set are not involved, and the detection on the above symbol position set is not required; and the relevant standard, for example, the symbol position {0, 2, 6 Testing is performed or detected using a third set of symbol positions in other embodiments of the present application. I will not repeat them later.

In the foregoing example 1, the second symbol position set {0} is taken as an example. Alternatively, the second symbol position set may also have multiple symbols or other symbol positions. For the detection process on these symbols, the symbol 0 of the foregoing example is used. The detection process is similar and will not be described again.

It should be noted that the second symbol position set and the first symbol position set should not have a common element I.

As described above, for the foregoing second time domain resource, the first symbol position set is not involved, and the detection is not performed on the first symbol position set {1, 3, 7}; the detection may be performed according to relevant standards, or The second set of symbol locations in other embodiments of the application is detected. As described above, for the foregoing third time domain resource, the first symbol position set and the second symbol position set are not involved, and the first symbol position set {1, 3, 7} and the second symbol position set {0 need not be needed. The detection is performed on the test; the detection may be performed according to relevant standards, or the third symbol position set in other embodiments in the present application may be used for detection. In this way, the detection overhead can be saved, and the UE can reduce power consumption and extend the working time.

(1) Frame structure on the non-complete slot at the beginning or end of the COT

In steps 101c and 102c, each mini-slot in the mini-slot combination sent on the non-complete slot follows the structure of the specified mini-slot. The standard specifies the possible structure of the mini-slot, for example, the length is 2, 4 or 7; and the symbol position of the DMRS in each mini-slot (for example, the DMRS is always in the first symbol of the mini-slot). Other structures or details of the mini-slot may continue to be specified in the standard and will not affect the implementation of this application.

In addition, in each embodiment, only the frame structure in the time domain is involved, and the transmission manner of the mini-slot and the slot in the frequency domain is not limited. For example, the DMRS may be located only on a partial subband of the first symbol of the mini-slot.

On the sending side (for example, the UE side), the foregoing method may further include:

100. Optionally, after receiving the uplink transmission resource configured by the gNB, the UE may prepare one or more mini-slots to be sent, that is, generate and cache one or more mini-slots. This step can be performed in parallel with the LBT process, or its time is not affected by the LBT. As long as the LBT is successful, there are enough mini-slots to be sent, saving some communication waiting time.

In order to achieve efficient communication efficiency, after the LBT is successful, one or more mini-slots should be used to fill all the symbol positions after the successful LBT and before the start of the first complete slot, ie the first symbol to the first one. At the end of the non-complete slot. Specifically, it can be filled in a post-alignment manner to maximize the start of the structure of the next complete slot. Therefore, embodiments of the present application provide a possible (allowed) mini-slot combination of post-alignment, that is, an allowed DMRS symbol position.

In addition, on the receiving side, preferably, according to the pre-configuration, whether there is a DMRS is detected on each of the first symbol position set and/or the second symbol position set.

In a specific example, on the receiving side, (for example, a base station such as gNB) 201c, detecting whether there is a DMRS on the symbol 0 in the slot;

202c. When no DMRS is retrieved on symbol 0, in a time domain resource less than one time slot, whether there is a DMRS (202) is detected on at least each symbol in the first symbol position set.

Before describing the above-specified allowed DMRS locations, the various possible mini-slot combinations on the non-complete slot and the symbol locations of the corresponding DMRSs (the symbol locations at which the gNB should be detected) are first described.

When the sequence of the DMRS is not related to the location of the symbol, or the DMRS sequence is related to the location of the symbol and the UE is strong, the UE can update the DMRS carried in the mini-slot according to the status of the LBT in real time, such as the UE. If the symbol 1 detects that the LBT fails, it will update the 4-symbol mini-slot that the DMRS is ready to send at symbol 3-6. If the LBT fails to be detected at symbol 3, the UE will update the DMRS contained in the mini-slot, when the UE reaches the symbol. 10 When it is detected that the LBT is successful, the UE can send a 4-symbol mini-slot containing the DMRS that has been updated.

When the uplink transmission time slot configured by the gNB for the UE is one or more complete slots, the combination of the minislot sent by the UE in the previously scheduled time slot after the LBT succeeds is referred to as a first type of mini-slot combination.

The white symbol in Figure 8a represents that the LBT has not passed, and the device cannot send data in the symbol; the diagonal lines, horizontal lines, and vertical lines represent mini-slots of different lengths. Referring to FIG. 8a, the UE transmits up to one mini-slot each having a length of 2, 4, and 7 symbols in the slot, and the communication system can support a total of 7 non-slot based scheduling of different symbol starting points. Using the above method for non-complete slot scheduling, the gNB needs to detect the symbol location set of the DMRS. All possibilities are listed as follows:

1. The communication system supports non-complete slot scheduling with the symbol starting point being 1. The communication system schedules up to three mini-slots of different lengths in the non-complete slot for uplink transmission:

The UE sends a 2 symbol, a 4 symbol and a 7 symbol mini-slot, and the gNB should be at the symbol {1, 3, 7} or {1, 3, 10} or {1, 5, 7} or {1, 5 , 12} or {1,8,12} or {1,8,10}, or perform DMRS detection on the union of the above symbols, ie the symbols {1,3,5,7,8,10,12} (Reference Option 1) in Figure 2.

2. The communication system supports scheduling only one mini-slot in a non-complete slot for uplink transmission:

The UE sends a 2-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {12} (option 7 in Figure 8a); or,

The UE sends a 4-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {10} (option 6 in Figure 8a); or,

The UE sends a 7-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {7} (option 4 in Figure 8a).

3. The communication system supports scheduling up to two mini-slots of different lengths in a non-complete slot for uplink transmission.

The UE sends a 4-symbol and a 7-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {3, 7} or {3, 10}, or in the union of the two, ie, the symbol {3, 7, 10 } Detect DMRS (option 2 in Figure 8a); or

The UE sends a 2-symbol and a 7-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {5, 7} or {5, 12}, or the union of the above two, ie the symbol {5, 7, 12 } Detect DMRS (option 3 in Figure 8a); or

The UE sends a 2 symbol and a 4 symbol mini-slot. The gNB should perform DMRS detection on the symbol {8, 10} or {8, 12}, or the union of the above two symbols, ie, the symbol {8, 10, 12 } Detect DMRS (option 5 in Figure 8a).

When the sequence generation of the DMRS is related to the symbol position in which it is located (ie, the symbol position is one of the input parameters of the DMRS sequence), and the UE cannot update the DMRS included in the mini-slot in real time according to the state of the LBT, the UE can support the UE. The type, number and location of mini-slots are limited. For example, when a DMRS of a mini-slot with a duration of 2 symbols is generated according to the position of symbol 1, it can only be transmitted at symbol 1-2. When the UE only prepares one mini-slot of lengths of 2, 4, and 7 symbols that are transmitted at 1, 3, and 7 symbols, the DMRS generation corresponding to the mini-slot is related to the symbol positions 1, 3, and 7. .

When the uplink transmission time slot configured by the gNB to the UE is one or more complete slots, the combination of the minislot sent by the UE in the previously scheduled time slot after the LBT succeeds is referred to as a second type of mini-slot combination.

At this time, according to the LBT status, the possible transmission manner of the UE is as follows:

1. The communication system supports non-complete slot scheduling with the symbol starting point being 1. The communication system schedules up to three mini-slots of different lengths for transmission in the non-complete slot:

The UE sends a 2 symbol, a 4 symbol and a 7 symbol mini-slot, and the gNB should perform DMRS detection on the symbol {1, 3, 7} (option 1 in Figure 8a).

2. The communication system supports scheduling one mini-slot for transmission in a non-complete slot:

The UE sends a 7-symbol mini-slot, and the gNB should perform DMRS detection on symbol {7} (option 4 in Figure 8a).

3. The communication system supports scheduling up to 2 mini-slots of different lengths for transmission in non-complete slots.

The UE sends a 4-symbol and 7-symbol mini-slot, and the gNB should perform DMRS detection on the symbol {3, 7} (option 2 in Figure 2).

The number of mini-slots selected by the UE and the length of the mini-slot may be specified by the standard or configured by the gNB. When the 2, 4, 7 symbol mini-slot preset transmission positions prepared by the UE are different, for example, when the UE first transmits a 4-symbol mini-slot and then transmits a 2-symbol and a 7-symbol mini-slot, the above DMRS symbol detection position Corresponding changes will occur, so I won't go into details here.

The third type of mini-slot combination and the symbol position that should be detected at least on the receiving side:

When the sequence of the DMRS is not related to the location of the symbol, or the DMRS sequence is related to the location of the symbol and the UE is strong, the UE can update the DMRS carried in the mini-slot according to the state of the LBT in real time.

When the gNB configures the uplink transmission time slot of the UE to be larger than one 14-symbol slot, and after the last complete time slot, there is also a non-complete slot resource whose length is L and L is less than 14 symbols; or, the gNB configures the UE The uplink transmission time slot only contains a non-complete slot resource of length L and L less than 14 symbols (and the resource time domain start position is the symbol position 0 of the complete slot resource). After the LBT succeeds, the UE transmits the minislot combination in the scheduled L slot, which is called the third type mini-slot combination.

It is assumed that the UE transmits up to one mini-slot of

length

2, 4, and 7 symbols in the slot, and the communication system can support a total of seven non-slot based schedulings for different durations. The communication system uses the following method for non-complete slot scheduling.

The gNB needs to detect the symbol location set of the DMRS. All possibilities are listed below:

When the last non-complete slot schedule lasts 13 symbols:

When the UE passes the LBT before the symbol 0, the UE may directly send a non-complete slot with a duration of 13 symbols, and its DMRS is located at symbol 0. When the gNB detects the DMRS on symbol 0, it can know that the UE sends a non-complete slot with a duration of 13 symbols. At this time, the UE can also send a combination of 2+4+7 symbol mini-slot, and the gNB can pass the

detection symbol

2,6. Whether there are additional DMRSs to distinguish between the above two cases;

If the LBT fails when the UE is at symbol 0, the UE will continue to perform LBT interception. If the LBT passes before symbol 2, the UE may start sending a 4-symbol and a 7-symbol mini-slot starting from symbol 1 or symbol 2. The gNB will perform DMRS detection on each symbol starting from the symbol 0, possibly detecting the DMRS on the symbol {K, K+4} or {K, K+7}, and K is the starting symbol for the mini-slot transmission of the UE. position;

If the UE fails to pass the symbol 2LBT, the UE will continue to perform LBT listening. If the LBT passes before the symbol 4, the UE may start sending a 2 symbol and a 7 symbol mini-slot starting from symbol 3 or symbol 4. The gNB will perform DMRS detection on each symbol starting from symbol 3, possibly detecting DMRS on the symbol {K, K+2} or {K, K+7}, and K is the starting symbol for mini-slot transmission of the UE. position;

If the UE fails the symbol 4LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 6, the UE may send a 7-symbol mini-slot from symbol 5 or symbol 6. gNB will perform DMRS detection on each symbol starting from symbol 5, possibly detecting DMRS on symbol {5} or {6};

If the UE fails to pass the symbol 6LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 7, the UE may send a 2 symbol and a 4 symbol mini-slot starting from the symbol 7. gNB will perform DMRS detection on each symbol starting from symbol 7, and gNB can detect DMRS on symbol {7, 9} or {7, 11};

If the UE fails the symbol 7LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 9, the UE may start sending a 4-symbol mini-slot from the symbol 8 or the symbol 9. gNB will perform DMRS detection on each symbol starting from symbol 8, possibly detecting DMRS on symbol {8} or {9};

If the UE fails to pass the symbol 9LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 11, the UE may send a 2-symbol mini-slot starting from the symbol 10 or the symbol 11, and the gNB will start from the symbol 10. DMRS detection is performed on each symbol, and DMRS may be detected on the symbol {10} or {11}.

In summary, the gNB will first detect the DMRS at symbol 0. If the detection is successful, the UE sends a non-complete slot with a length of 13 symbols. If DMRS is detected in symbol 1 or symbol 2, it can be determined according to the symbol position of the subsequent DMRS whether the UE sends a 4-symbol mini-slot+7 symbol mini-slot or a 7-symbol mini-slot+4 symbol mini-slot. Of course, in another example, the order of sending different mini-slots may also be fixed by the standard, for example, according to the order of sending mini-slots, such as a large mini-slot first, a small mini-slot, or Small mini-slots are issued first, and large mini-slots are issued. Among them, the mini-slot with small initial length can further utilize time-frequency resources and improve the utilization of time-frequency resources. In the foregoing example, as long as the transmission order of the mini-slot is fixed, no additional DMRS detection is required on the receiving side. If DMRS is detected at symbol 3 or symbol 4, the UE transmits a 2-symbol mini-slot+7 symbol mini-slot. If DMRS is detected at symbol 5 or symbol 6, the UE sends a 7-symbol mini-slot. If DMRS is detected at symbol 7, the UE transmits a 2-symbol mini-slot+4 symbol mini-slot. If DMRS is detected at symbol 8 or symbol 9, the UE sends a 4-symbol mini-slot. If DMRS is detected at symbol 10 or symbol 11, the UE transmits a 2-symbol mini-slot.

When the last non-complete slot schedule lasts for L (L < 13) symbols:

When the UE passes the LBT before the symbol 0, the UE may directly send a non-complete slot with a duration of L symbol, and its DMRS is located at symbol 0. The gNB detects the DMRS on symbol 0, and knows that the UE sends a non-complete slot with a duration of L symbol;

If the LBT fails when the UE is at symbol 0, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M=L-11, M>0), the UE will send a 4-symbol and a 7-symbol mini- Slot, gNB can perform DMRS detection on the symbol {M, M+4} or {M, M+7}, or on the union of the above symbols, ie, the symbols {M, M+4, M+7};

If the LBT fails when the UE is at symbol 0, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M=L-9, M>0), the UE will send a 2 symbol and a 7-symbol mini- Slot, gNB can perform DMRS detection on the symbol {M, M+2} or {M, M+7}, or on the union of the above symbols, ie, the symbols {M, M+2, M+7};

If the LBT fails when the UE is at symbol 0, the UE continues to perform LBT interception. If the LBT passes before the symbol (M=L-7, M>0), the UE sends a 7-symbol mini-slot, and the gNB can DMRS detection is performed on the symbol {M}; if the LBT fails when the UE is at symbol 0, the UE continues to perform LBT interception, and if the LBT passes before the symbol (M=L-6, M>0), the UE sends A 2 symbol and a 4 symbol mini-slot, gNB can be in the symbol {M, M+2} or {M, M+4}, or in the union of the above symbols, ie the symbol {M, M+2, M+ 4} perform DMRS detection;

If the LBT fails when the UE is at symbol 0, the UE continues to perform LBT interception. If the LBT passes before the symbol (M=L-4, M>0), the UE sends a 4-symbol mini-slot, and the gNB can DMRS detection is performed on the symbol {M}; if the LBT fails when the UE is at symbol 0, the UE continues to perform LBT interception, and if the LBT passes before the symbol (M=L-2, M>0), the UE transmits A 2-symbol mini-slot, gNB can perform DMRS detection on the symbol {M};

In summary, the gNB detects the DMRS in the above symbol set of the third time domain resource to determine the mini-slot or mini-slot combination actually sent by the UE.

The fourth type of mini-slot combination and the symbol position that should be detected at least:

When the sequence generation of the DMRS is related to the location of the symbol and the UE capability is weak, the UE cannot update the DMRS carried in the mini-slot according to the state of the LBT in real time.

When the gNB configures the uplink transmission time slot of the UE to be larger than one 14-symbol slot, and after the last complete time slot, there is also a non-complete slot resource whose length is L and L is less than 14 symbols; or, the gNB configures the UE The uplink transmission time slot only contains a non-complete slot resource of length L and L less than 14 symbols (and the resource time domain start position is the symbol position 0 of the complete slot resource). After the LBT succeeds, the UE transmits the minislot combination in the scheduled L slot, which is called the fourth type mini-slot combination.

Optionally, the UE may be configured to transmit a maximum of one, two, four, and seven symbols of the mini-slot in the slot, and the UE first sends the mini-slot with the length of 2, 4, and 7 symbols in a certain order. And generate DMRS according to the symbol position where each mini-slot is located. The UE uses the above method to perform non-complete slot scheduling.

When the last non-complete slot schedule lasts 13 symbols:

In one example, the UE configures to send the mini-slot in the form of a 2-symbol mini-slot, a 4-symbol mini-slot, and a 7-symbol mini-slot.

When the UE passes the LBT before the symbol 0, the UE may directly send a non-complete slot with a duration of 13 symbols, and its DMRS is located at symbol 0. The gNB detects the DMRS on symbol 0 to know that the UE sends a non-complete slot with a duration of 13 symbols or a mini-slot combination of 2+4+7 symbols. gNB can distinguish between the two by DMRS detection at symbol 2, symbol 6 position;

If the LBT fails when the UE is at symbol 0, the UE will continue to perform LBT interception. If the LBT passes before the symbol 2, the UE will send a 4-symbol and a 7-symbol mini-slot starting from the symbol 2. gNB will perform DMRS detection on each symbol starting from symbol 0, possibly detecting DMRS on symbol {2, 6};

If the UE fails to pass the symbol 2LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 6, the UE will send a 7-symbol mini-slot from the symbol 6. The gNB will perform DMRS detection on each symbol starting from symbol 2, possibly detecting DMRS on symbol {6};

In summary, the gNB will first detect the DMRS at symbol 0. If the detection is successful, the UE sends a combination of a non-complete slot or a 2+4+7 symbol mini-slot of length 13; if detected at symbol 2 To the DMRS, the UE sends a 4-symbol mini-slot+7 symbol mini-slot; if the DMRS is detected at symbol 6, the UE sends a 7-symbol mini-slot. The above is the transmission mechanism and gNB detection method when the mini-slot configured by the UE is 2+4+7. The UE may also use other mini-slot transmission configurations, which may be given by the standard or configured by the gNB to the UE.

When the last non-complete slot schedule lasts for L (L < 13) symbols:

It is assumed that the UE transmits up to one mini-slot of

length

2, 4, and 7 symbols in the slot, and the UE first transmits the mini-slots of

length

2, 4, and 7 symbols in a certain order, and according to each mini. The symbol position where -slot is located generates DMRS.

For example, when L is =12, the UE can configure a 4-symbol mini-slot and a 7-symbol mini-slot in the non-complete slot. At this time, all possible mini-slot transmission methods of the UE are as follows:

When the UE passes the LBT before the symbol 0, the UE may directly send a non-complete slot with a duration of L symbol, and its DMRS is located at symbol 0. The gNB detects the DMRS on symbol 0 to know that the UE sends a non-complete slot with a duration of L symbol;

If the LBT fails when the UE is at symbol 0, the UE continues to perform LBT interception. If the LBT passes before the symbol (M=L-11, M>0), the UE is configured in advance and sends a 4 symbol and a 7-symbol mini-slot, gNB can perform DMRS detection on the symbol {M, M+4} or {M, M+7} or on the union {M, M+4, M+7} of the above symbols;

If the LBT fails to pass the UE at symbol 0, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M=L-7, M>0), the UE will send a 7-symbol mini-slot, and the gNB will From the symbol {L-10}, DMRS detection can be performed on the symbol {M};

In summary, the gNB determines the symbol location set detection for DMRS detection according to the third time domain resource persistent symbol number, thereby determining the mini-slot or mini-slot combination actually sent by the UE. It should be noted that the gNB will determine the possible mini-slot configurations (such as the number of mini-slots and their durations) and the corresponding DMRS detection symbol location set according to the value of the previous configuration L, in the same manner as described above. , will not repeat them here. In addition, the mini-slot combination configured by the UE may be specifically configured by the gNB or may be given by a standard. If the UE is configured with a 4-symbol mini-slot and a 7-symbol mini-slot, the gNB can be configured with a 4-signal and a 7-symbol mini-slot, or it can be given by the standard. The UE will only send the 4-symbol mini first. -slot, then send 7-symbol mini-slot.

The fifth type of mini-slot combination and the symbol position that should be detected at least on the receiving side:

When the gNB configures the uplink transmission time slot of the UE to be larger than one 14-symbol slot, and before the first complete time slot, there is also a non-complete slot resource whose length is L and L is less than 14 symbols; or, gNB is given to the UE. The configured uplink transmission time slot only includes one non-complete slot resource whose length is L and L is less than 14 symbols (and the resource time domain end position is the symbol position 13 of the complete slot resource). After the LBT succeeds, the UE transmits the minislot combination in the scheduled L slot, which is called the fifth type mini-slot combination.

It is assumed that the UE transmits up to one mini-slot of

length

When the first non-complete slot schedule lasts 13 symbols:

When the UE passes the LBT before the symbol 1, the UE can directly transmit a non-complete slot with a duration of 13 symbols, and its DMRS is located at symbol 1. When the gNB detects the DMRS on symbol 0, it can know that the UE sends a non-complete slot with a duration of 13 symbols. At this time, the UE can also send a combination of 2+4+7 symbol mini-slot, and the gNB can pass the

detection symbol

3, 7. Whether there are additional DMRSs to distinguish between the above two cases;

If the LBT fails when the UE is at symbol 1, the UE will continue to perform LBT interception. If the LBT passes before symbol 3, the UE may send a 4-symbol and a 7-symbol mini-slot starting from symbol 2 or symbol 3. gNB will perform DMRS detection on each symbol starting from symbol 1, possibly DMRS on symbol {K, K+4} or {K, K+7}, K is the starting symbol for mini-slot transmission of UE position;

If the UE fails to pass the symbol 3LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 5, the UE may start sending a 2 symbol and a 7-symbol mini-slot from the symbol 4 or the symbol 5. The gNB will perform DMRS detection on each symbol starting from symbol 4, possibly detecting DMRS on the symbol {K, K+2} or {K, K+7}, and K is the starting symbol for mini-slot transmission of the UE. position;

If the UE fails to pass the symbol 5LBT, the UE will continue to perform LBT listening. If the LBT passes before the symbol 7, the UE may send a 7-symbol mini-slot from symbol 6 or symbol 7. gNB will perform DMRS detection on each symbol starting from symbol 5, possibly detecting DMRS on symbol {6} or {7};

If the UE fails to pass the symbol 7LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 8, the UE may send a 2 symbol and a 4 symbol mini-slot starting from the symbol 8. The gNB will perform DMRS detection on each symbol starting from the symbol 8, and the gNB can detect the DMRS on the symbol {8, 10} or {8, 12};

If the UE fails to pass the symbol 8LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 10, the UE may start sending a 4-symbol mini-slot from the symbol 9 or the symbol 10. The gNB will perform DMRS detection on each symbol starting from symbol 9, and may detect DMRS on symbol {9} or {10};

If the UE fails to pass the symbol 10LBT, the UE will continue to perform LBT listening. If the LBT passes before the symbol 12, the UE may start sending a 2-symbol mini-slot from the symbol 11 or the symbol 12, and the gNB will start from the symbol 11 DMRS detection is performed on each symbol, and DMRS may be detected on the symbol {11} or {12}.

In summary, the gNB will first detect the DMRS at symbol 1, and if the detection is successful, the UE sends a non-complete slot with a length of 13 symbols. If the DMRS is detected in the symbol 2 or the symbol 3, it can be determined according to the symbol position of the subsequent DMRS whether the UE transmits the 4-symbol mini-slot+7 symbol mini-slot or the 7-symbol mini-slot+4 symbol mini-slot. Of course, in another example, the order of sending different mini-slots may also be fixed by the standard, for example, according to the order of sending mini-slots, such as a large mini-slot first, a small mini-slot, or Small mini-slots are issued first, and large mini-slots are issued. Among them, the mini-slot with small initial length can further utilize time-frequency resources and improve the utilization of time-frequency resources. In the foregoing example, as long as the transmission order of the mini-slot is fixed, no additional DMRS detection is required on the receiving side. If DMRS is detected at symbol 4 or symbol 5, the UE transmits a 2-symbol mini-slot+7 symbol mini-slot. If DMRS is detected at symbol 6 or symbol 7, the UE sends a 7-symbol mini-slot. If DMRS is detected at symbol 8, the UE transmits a 2-symbol mini-slot+4 symbol mini-slot. If DMRS is detected at symbol 9 or symbol 10, the UE transmits a 4-symbol mini-slot. If DMRS is detected at symbol 11 or symbol 12, the UE transmits a 2-symbol mini-slot.

When the first non-complete slot schedule lasts for L (L < 13) symbols:

When the UE passes the LBT before the symbol (14-L), the UE can directly transmit a non-complete slot with a duration of L symbol, and its DMRS is located at the symbol (14-L). The gNB detects the DMRS on the symbol (14-L), and knows that the UE sends a non-complete slot with a duration of L symbol;

If the LBT fails during the symbol (14-L), the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 11 ≤ L < 13), the UE will send a 4 Symbol and a 7-symbol mini-slot, gNB can be in the symbol {M,M+4} or {M,M+7}, or in the union of the above symbols, ie the symbol {M,M+4,M+7} Perform DMRS detection on;

If the LBT fails when the UE is at symbol 3, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 9 ≤ L < 13), the UE will send a 2 symbol and a 7 The symbol's mini-slot, gNB can be DMRS detected on the symbol {M, M+2} or {M, M+7}, or on the union of the above symbols, ie the symbol {M, M+2, M+7} ;

If the LBT fails when the UE is at symbol 5, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 7≤L<13), the UE will send a 7-symbol mini-slot, and the gNB can be in the symbol. DMRS detection on {M};

If the LBT fails during the symbol (14-L), the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 6 ≤ L < 13), the UE will send a 2 Symbol and a 4-symbol mini-slot, gNB can be in the symbol {M,M+2} or {M,M+4}, or in the union of the above symbols, ie the symbol {M,M+2,M+4} Perform DMRS detection on;

If the LBT fails during the symbol (14-L), the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 4 ≤ L < 13), the UE will send a 4 The symbol's mini-slot, gNB can perform DMRS detection on the symbol {M};

If the LBT fails during the symbol (14-L), the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 2 ≤ L < 13), the UE will send a 2 The symbol's mini-slot, gNB can perform DMRS detection on the symbol {M};

In summary, the gNB detects the DMRS in the above symbol set of the third time domain resource to determine the mini-slot or mini-slot combination actually sent by the UE. It should be noted that the gNB will determine which step of the above step to start the DMRS detection according to the value of the previous configuration L. If L=8, the gNB starts to detect the DMRS from step b; if L=4, the gNB only performs the step e. DMRS detection.

The sixth type of mini-slot combination and the symbol position that should be detected at least:

When the sequence generation of the DMRS is related to the location of the symbol and the UE capability is weak, the UE cannot update the DMRS carried in the mini-slot according to the state of the LBT in real time. When the gNB configures the uplink transmission time slot of the UE to be larger than one 14-symbol slot, and before the first complete time slot, there is also a non-complete slot resource whose length is L and L is less than 14 symbols; or, gNB is given to the UE. The configured uplink transmission time slot only includes one non-complete slot resource whose length is L and L is less than 14 symbols (and the resource time domain end position is the symbol position 13 of the complete slot resource). After the LBT succeeds, the UE transmits the minislot combination in the scheduled L slot, which is called the sixth type mini-slot combination.

When the first non-complete slot schedule lasts 13 symbols:

When the UE passes the LBT before the symbol 1, the UE can directly transmit a non-complete slot with a duration of 13 symbols, and its DMRS is located at symbol 1. The gNB detects the DMRS on symbol 1 to know that the UE sends a non-complete slot with a duration of 13 symbols or a mini-slot combination of 2+4+7 symbols. gNB can distinguish between the two by DMRS detection at symbol 3, symbol 7 position;

If the LBT fails when the UE is at symbol 1, the UE will continue to perform LBT interception. If the LBT passes before the symbol 3, the UE will send a 4-symbol and a 7-symbol mini-slot starting from the symbol 3. The gNB will perform DMRS detection on each symbol starting from symbol 1, and may detect DMRS on symbol {3, 7};

If the UE fails to pass the symbol 3LBT, the UE will continue to perform LBT interception. If the LBT passes before the symbol 7, the UE will send a 7-symbol mini-slot from the symbol 7. The gNB will perform DMRS detection on each symbol starting from symbol 3, possibly detecting DMRS on symbol {7};

In summary, the gNB will first detect the DMRS at symbol 1, and if the detection is successful, the UE sends a combination of a non-complete slot or a 2+4+7 symbol mini-slot of length 13; if detected at symbol 3 To the DMRS, the UE sends a 4-symbol mini-slot+7 symbol mini-slot; if the DMRS is detected at symbol 7, the UE sends a 7-symbol mini-slot. The above is the transmission mechanism and gNB detection method when the mini-slot configured by the UE is 2+4+7. The UE may also use other mini-slot transmission configurations, which may be given by the standard or configured by the gNB to the UE.

When the first non-complete slot schedule lasts for L (L < 13) symbols:

It is assumed that the UE transmits up to one mini-slot of

length

2, 4, and 7 symbols in the slot, and the UE first transmits the mini-slots of

length

When the UE passes the LBT before the symbol 2, the UE may directly send a non-complete slot with a duration of L symbol, and its DMRS is located at symbol 2. The gNB detects the DMRS on symbol 2 to know that the UE sends a non-complete slot with a duration of L symbol;

If the LBT fails when the UE is at symbol 2, the UE continues to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 11 ≤ L < 13), the UE is configured in advance and sends a 4 symbols and a 7-symbol mini-slot, gNB can be performed on the symbol {M, M+4} or {M, M+7} or on the union of the above symbols {M, M+4, M+7} DMRS detection;

If the LBT fails to pass the UE at symbol 2, the UE will continue to perform LBT interception. If the LBT passes before the symbol (M, 14-L ≤ M, 9 ≤ L < 13), the UE will send a 7-symbol mini- Slot, gNB will perform DMRS detection on the symbol {M};

In summary, the gNB determines the symbol location set detection for DMRS detection according to the third time domain resource persistent symbol number, thereby determining the mini-slot or mini-slot combination actually sent by the UE. It should be noted that the gNB will determine the possible mini-slot configurations (such as the number of mini-slots and their durations) and the corresponding DMRS detection symbol location set according to the value of the previous configuration L, in the same manner as described above. , will not repeat them here. In addition, the mini-slot combination configured by the UE may be specifically configured by the gNB or may be given by a standard. If the UE is configured with a 4-symbol mini-slot and a 7-symbol mini-slot, the gNB can be configured with a 4-signal and a 7-symbol mini-slot. It can also be given by the standard. The UE will only send the 4-symbol mini first. -slot, then send 7-symbol mini-slot.

Further, the first one or more (x) symbols in the complete/non-complete slot of the uplink transmission configured by the gNB to the UE may be used to perform the LBT, and the first/second/third/fourth/fifth/first The DMRS detection symbol positions in the six types of minislot combinations are shifted backward by x symbols, and will not be described herein.

In summary, the UE determines the mini-slot to be sent according to the result of the LBT and the uplink time slot information configured by the gNB for the UE and the allowed mini-slot combination specified by the standard (for example, specifying the first set of symbol positions). Slot combination.

Preferably, in another embodiment, when the capability of the UE is strong, the DMRS carried by the minislot/slot may be updated in real time according to the LBT result, and the UE may transmit more than one mini-slot/slot PUSCH, optionally, the UE may The DMRS is sent only on the first mini-slot/slot of one or more mini-slots/slots that are allowed to be sent. This can further save system overhead. At this time, the gNB may not be able to judge the mini-slot/slot order sent by the UE according to the DMRS, but the order of transmission of the mini-slot/slot may be configured by the gNB (as indicated in the RMSI/OSI) or by the standard.

When the uplink resource configured by the gNB to the UE includes only one initial non-complete slot, the gNB shall perform DMRS detection according to the UE capability according to the fifth/sixth type minislot combination (ie, the foregoing first symbol position set or a subset thereof). To determine the mini-slot/slot combination that the UE actually sends;

When the uplink resource configured by the gNB for the UE includes only one end non-complete slot, the gNB shall be combined according to the UE capability according to the third/fourth type minislot (ie, the foregoing second symbol position set and/or the third symbol position set). Perform DMRS detection to determine the mini-slot/slot combination actually sent by the UE;

When the uplink resource configured by the gNB for the UE includes one initial non-complete slot plus a number of complete slots, the gNB shall be combined according to the UE capability according to the fifth/sixth type minislot (ie, the foregoing first symbol position set or a subset thereof). In the initial non-complete slot, the DMRS detection is performed on the complete slot according to the first/second type minislot combination (the aforementioned first symbol position set and/or the second symbol position set) to determine the mini-slot actually sent by the UE. /slot combination;

When the gNB configures the uplink resource of the UE to include one initial non-complete slot plus a number of complete slots plus one non-complete slot at the end, the gNB shall be in accordance with the UE capability according to the fifth/sixth type minislot combination (ie, the foregoing a set of symbol positions or a subset thereof) in the initial non-complete slot, according to the first/second type minislot combination (the aforementioned first symbol position set and / or the second symbol position set) on the complete slot, according to the above The third/fourth type minislot combination (ie, the foregoing second symbol position set and/or the third symbol position set) performs DMRS detection on the last non-complete slot to determine the mini-slot/slot combination actually sent by the UE;

When the uplink resource configured by the gNB for the UE includes several complete slots plus one non-complete slot at the end, the gNB shall combine the first/second type minislot according to the UE capability (the aforementioned first symbol position set and/or the second symbol) Position set) on the complete slot, according to the third/fourth type minislot combination (ie, the foregoing second symbol position set and/or the third symbol position set), perform DMRS detection on the last non-complete slot to determine the actual transmission of the UE. Mini-slot/slot combination;

When the uplink resource configured by the gNB to the UE includes several complete slots, the gNB shall perform the complete slot on the complete slot according to the UE capability according to the first/second type minislot combination (the foregoing first symbol position set and/or the second symbol position set). DMRS detection to determine the mini-slot/slot combination actually sent by the UE;

When the uplink resource configured by the gNB for the UE includes one initial non-complete slot plus one last non-complete slot, the gNB shall be according to the UE capability according to the fifth/sixth type minislot combination (ie, the foregoing first symbol position set or a subset thereof) in the initial non-complete slot, performing DMRS detection on the last non-complete slot according to the third/fourth type minislot combination (ie, the foregoing second symbol position set and/or the third symbol position set) to determine the UE The actual mini-slot/slot combination sent.

(2) About the first symbol position set

Preferably, the first set of symbol locations includes but is not limited to:

Example 1, {1, 3, 7}:

It is only possible to carry the DMRS on the symbol {1, 3, 7}. That is, the receiving side can detect whether there is a DMRS on only 3 symbols, and these 3 symbols are 1, 3, and 7.

Example 2, {3, 7}:

The PUSCH may only carry the DMRS on the symbol {3, 7}.

Example 3, {5, 7}:

The PUSCH may only carry DMRS on the symbol {5, 7}.

Example 4, {8, 10}:

The PUSCH may only carry the DMRS on the symbol {8, 10}.

In the above embodiment, the information to be transmitted is also carried on the non-complete slot after the successful LBT, and the resource can be utilized efficiently. On the other hand, with respect to the scheme that the DMRS may be carried on each symbol in the non-complete slot, the transmission process can be simplified by specifying the symbol position that may carry the DMRS, and accordingly, the blind detection PUSCH of the receiving side can be simplified. the complexity.

(3) Frame structure on the complete slot

As mentioned in the schemes of the foregoing 101c-102c, 101d-102d, the uplink transmission time slot after the successful LBT may include one or more time domain resources (14 symbols) of the full slot length. The complete 14 symbols can be either an existing slot frame structure or a combination of multiple mini-slots.

Preferably, after the LBT succeeds, the other DMRS and the scheduled PUSCH are also sent on the time domain resources of the one or more complete slots, and the symbol position where the DMRS is located is recorded as the second symbol position set. The second set of symbol locations is different from the first set of symbol locations.

For a complete slot PUSCH scheduling UE may send DMRS at symbol 0, whether DMRS is sent at other locations, and the number of DMRSs is uncertain. On the gNB side, the detection of the DMRS should be performed at least at symbol 2. When the above scheme is adopted, the second symbol position set has only {0}.

For example, the UE side can use two 7-symbol mini-slots in the complete slot, ie it is only possible to carry the DMRS on the symbol {0, 7}. Alternatively, three 4 symbols and a 2 symbol mini-slot can be used in the complete slot, ie it is only possible to carry the DMRS on the symbol {0, 7} or the symbol {0, 2, 6, 10}. Correspondingly, on the gNB side, DMRS detection should be performed on at least the symbol {0, 7} or the symbol {0, 2, 6, 10}. The above set of symbols is the aforementioned second set of symbol positions for the complete slot.

Preferably, one of the above second symbol position sets or two or more types may be defined. In a plurality of cases, the network device side may also send an indication of the current second set of symbol positions, so that the UE adopts the indicated second set of symbol positions for the complete slot.

It should be noted that, in order to make the scheme clear, whether it is an uplink transmission or a downlink transmission, for the foregoing first symbol position set, the second symbol position set (if any) or the third symbol position set (if any), One or more of the set of locations described above are defined in the standard. If it is one, no additional instructions are required; if it is multiple, it may be necessary to indicate the set of locations to use. This article does not limit its specific instructions.

Preferably, the standard may define an allowable mini-slot combination (which may be one or more), and the standard may further define the order in which the respective mini-slots are allowed to be transmitted, which may be one or more. Preferably, a sequence of sending mini-slots is agreed. For example, according to the order of sending mini-slots, for example, a mini-slot with a large length is sent first, a mini-slot with a small length is issued, or a mini-slot with a small length is issued first, and a mini-slot with a large length is issued. . Among them, the mini-slot with small initial length can further utilize time-frequency resources and improve the utilization of time-frequency resources. The fixed mini-slot sequence further simplifies the detection process on the receiving side. In various embodiments, by defining a first set of symbol locations (if any), a second set of symbol locations (if any) or a set of third symbol locations (if any), with reference to Figures 8 and 8a, on the one hand, the permissible The mini-slot combination, on the other hand, defines the order of allowed mini-slots, thereby improving communication efficiency and simplifying reception-side processing.

Specifically, it includes the following different ways:

101-1. The standard defines only a first set of symbol locations (if any), a second set of symbol locations (if any), or a set of third symbol locations (if any). In other words, there is only one set of possible (allowed) combinations of mini-slots. Or, the standard directly defines the type, number, and location of allowed mini-slots in the first time domain resource. It can also be understood that, for the uplink, it is defined at which symbol position in the slot in which the first time domain resource is located in the DMRS of each mini-slot. For the downlink, it is defined at which symbol position in the slot in which the control signalling may be located in the slot in which the first time domain resource is located.

101-2. The standard defines a plurality of first symbol position sets. That is to say, there are multiple sets of possible (allowed) combinations of mini-slots. In each first set of symbol positions, the possible symbol positions of the respective DMRSs are not identical. For example, a set of any two or more symbol positions in Examples 1 to 7 described later.

Specifically, in the solution of 101-2, the gNB may send RRC or other signaling, for explicitly or implicitly indicating to the UE, a first set of symbol locations used by the current network; so that the UE is used in the current network (configured ) Uplink transmission at the symbol position. Each first set of symbol positions may have its own index index, or may be indicated by means of a bitmap, or may be multiplexed with other information in other manners.

For example, a 14-bit bitmap is used to indicate that each bit corresponds to an OFDM symbol in the slot, and the value of the bit is "1", indicating that the UE needs to perform DMRS blind detection at the symbol position. "0" indicates that the UE does not need to perform DMRS blind detection at the symbol position, and may also indicate that the "0" is required to perform DMRS blind detection at the symbol position, and "1" indicates that the UE is at the symbol position. No DMRS blind inspection is required.

For another example, when the first symbol position set is limited, if the communication system only supports detection at position 0, when {3, 7} or {3, 7, 10} two symbol position sets, only 1 bit is needed. The DMRS blind check configuration that the UE should use can be indicated.

Optionally, in another implementation manner different from the foregoing various implementation manners, only LBT (transfer communication is not allowed) is allowed on the first OFDM symbol on each of the foregoing possible mini slots or slots. In this case, the standard The allowed location that can carry DMRS (uplink) or control signaling (downlink) can be the second OFDM symbol on each mini slot or slot (or possibly the 2-3th or 2-4th OFDM symbol) . At this time, the foregoing first symbol position set, the second symbol position set or the third symbol position set will correspondingly remove the OFDM symbol position that does not allow communication, and adjust the OFDM symbol position carrying DMRS (uplink) or control signaling (downlink). .

For example, the foregoing first symbol position set {1, 3, 7} and the two symbol position set {0} are taken as an example. If the LBT scheme can only be performed by using the first OFDM symbol, the first symbol position set is {3, 7}, the second symbol position set is {1}. Other examples are not described here.

In addition, the embodiment of the present invention further provides a wireless communication system, which may be the wireless communication system 100 shown in FIG. 1 or the wireless communication system 10 shown in FIG. 10, which may include: a network device. And terminal. The terminal may be the terminal in the foregoing embodiment, and the network device may be the network device in the foregoing embodiment. Specifically, the terminal may be the terminal 300 shown in FIG. 2, and the network device may be the network device 400 shown in FIG. The terminal may also be the terminal 400 shown in FIG. 10, and the network device shown may also be the network device 500 shown in FIG. For specific implementations of the network and the terminal, reference may be made to the foregoing embodiments, and details are not described herein again.

Taking the network device shown in FIG. 2 as an example, the network device processor 405 is configured to control the transmitter 407 to transmit in an unlicensed band and/or a licensed band and control the receiver 409 to receive in an unlicensed band and/or a licensed band. Transmitter 407 is used to support the network device to perform the process of transmitting data and/or signaling. Receiver 409 is for supporting a network device to perform a process of receiving data and/or signaling. The memory 405 is used to store program codes and data of the network device.

Specifically, the transmitter 407 can be used to perform the above methods 101a-102a, 101b-102b, 100, 103; 101c-102c, 101d-102d, and the like. For other functions and workflows, refer to the foregoing embodiments, and details are not described herein again. .

For the specific implementation of the components in the network device, reference may be made to the foregoing method embodiments, and details are not described herein again.

Taking the terminal shown in FIG. 2 as an example, the terminal processor 304 is configured to invoke an instruction stored in the memory 312 to control the transmitter 306 to transmit in an unlicensed band and/or a licensed band and control the receiver 308 in an unlicensed band. And/or licensed bands for reception. Transmitter 306 is used to support the terminal in performing the process of transmitting data and/or signaling. Receiver 308 is used to support the process by which the terminal performs reception of data and/or signaling. The memory 312 is used to store program codes and data of the terminal.

Specifically, the receiver 308 can be used in the methods 201a-202a, 201b-202b, 200; 201c-202c, 201d-202d, and the like. For other functions and workflows, refer to the foregoing embodiments, and details are not described herein again.

Specifically, the transmitter 306 can be configured to send uplink data on the monitored idle frequency domain resources.

For the specific implementation of the components in the terminal, reference may be made to the foregoing method embodiments, and details are not described herein again.

Those skilled in the art can understand that each functional module in the embodiment can be divided differently without affecting the implementation of the product. For example, the LBT module can be divided to implement the LBT function of FIG. 4A and/or 4B, and the data preparation module can be divided to generate a cache mini-slot; different transmission modules can be divided for CORESET and data transmission respectively. Receive module for CORESET and data reception. In the product, the above modules are likely to be integrated in hardware and software, such as processors or integrated circuits.

The steps of the method or algorithm described in connection with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in RAM, flash memory, ROM, Erasable Programmable ROM (EPROM), and electrically erasable programmable read only memory (Electrically EPROM). EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transceiver or relay device. Of course, the processor and the storage medium may also exist as discrete components in the radio access network device or the terminal device.

Those skilled in the art should appreciate that in one or more of the above examples, the functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

The specific embodiments of the present invention have been described in detail with reference to the embodiments of the present invention. The scope of the present invention is to be construed as being limited to the scope of the embodiments of the present invention.

Claims

A signal transmission method, comprising:

Conduct LBT;

After the LBT succeeds, transmitting a combination of allowed minislot mini-slots on one or more time domain resources of less than 1 slot slot; starting from each mini-slot in the allowed mini-slot combination The initial symbol position is recorded as a first symbol position set; the mini-slot combination includes one or more mini-slots.
The method according to claim 1, wherein each of the mini-slots includes a control resource set CORESET carrying control signaling, the control signaling comprising: first common control signaling, the first common control signaling The configuration information indicating the maximum channel occupation time MCOT or the channel occupation time COT;

Alternatively, the demodulation reference signal DMRS is carried on one or more symbol positions in the respective mini-slots.
The method according to claim 1 or 2,

The first set of symbol locations is one or more of the following set of symbol locations:

{1,3,7},{3,7,10},{3,7},{7,10},{5,7,12},{5,7},{7,12}.
The method according to claim 1 or 2,

The first set of symbol positions is a plurality of;

The method also includes transmitting an indication of the first set of first set of symbol locations currently in use.
The method of claim 1 further comprising

After the LBT is successful, it is also sent on one or more 14-symbol time domain resources: a complete slot or a combination of other mini-slots, the other mini-slot combinations of the respective mini-slots The starting symbol position is recorded as a second set of symbol positions; the second set of symbol positions is different from the first set of symbol positions.
The method according to claim 1 or 2, further comprising: transmitting an indication of a starting position of the maximum channel occupation time MCOT.
A signal receiving method, characterized in that it comprises

Receiving a signal; processing the received signal according to a combination of allowed mini-slots on at least one or more time domain resources of less than 1 slot slot; the allowed combination of mini-slots includes one or more mini- Slot; the initial symbol position of each mini-slot in the allowed mini-slot combination, denoted as the first set of symbol positions.
The method of claim 7

The first set of symbol locations is one or more of the following set of symbol locations:

{1,3,7},{3,7,10},{3,7},{7,10},{5,7,12},{5,7},{7,12}.
A method according to claim 7 or 8,

The first set of symbol positions is a plurality of;

The method also includes receiving an indication of the currently used first set of symbol locations.
The method of claim 7 or 8, the method further comprising:

Receiving a complete slot or other combination of mini-slots on one or more 14-symbol time domain resources, the starting symbol positions of the respective mini-slots of the other mini-slot combinations are recorded as the second a set of symbol locations; the second set of symbol locations being different from the first set of symbol locations.
The method according to claim 7 or 8, further comprising receiving an indication of a maximum channel occupancy time MCOT or a start position of a channel occupation time COT.
The method according to claim 7 or 8, wherein the signal is a downlink signal, and the processing the received signal comprises:

Detecting whether there is control signaling on symbol 0 or 0, 1 or 0, 1 and 2 in the slot; (201b)

When the control signaling is not retrieved on symbol 0 or symbol 0, 1 or symbols 0, 1 and 2, in at least one time slot resource, at least in the first symbol position set Whether there is control signaling (202) on consecutive n symbols from the symbol, n is 1 or 2 or 3 (202b) to determine the combination of the received mini-slots.
The method according to claim 7 or 8, wherein the signal is an uplink signal, and the signal received by the processing comprises:

The demodulation reference signal DMRS is sequentially detected on each symbol of the first symbol position set.
The method according to claim 10, wherein the signal is an uplink signal, and the signal received by the processing comprises:

On each of the symbols of the first set of symbol positions and the second set of symbol positions, the demodulation reference signal DMRS is sequentially detected to determine a combination of the received mini-slots.
A signal transmission device, comprising:

a first module for performing LBT;

a second module, configured to send a combination of allowed mini-slots on one or more time domain resources of less than one slot slot after the LBT succeeds; the allowed mini-slot combination includes one or more Mini-slot; the starting symbol position of each mini-slot in the allowed mini-slot combination, recorded as the first set of symbol positions.
The apparatus according to claim 13, wherein each of the mini-slots includes a control resource set CORESET carrying control signaling, the control signaling comprising: first common control signaling, the first common control signaling Instructing the configuration information of the MCOT;

Alternatively, the demodulation reference signal DMRS is carried on one or more symbol positions in the respective mini-slots.
A device according to claim 15 or 16,

The first set of symbol locations is one or more of the following set of symbol locations:

{1,3,7},{3,7,10},{3,7},{7,10},{5,7,12},{5,7},{7,12}.
A device according to claim 15 or 16,

The first set of symbol positions is a plurality of;

The apparatus also includes transmitting an indication of the first set of symbol locations currently in use.
The device of claim 14 further comprising

a third module, configured to send, on the time domain resource of one or more 14 symbols, after the success of the LBT: a complete slot or a combination of other mini-slots, the combination of the other mini-slots The starting symbol position of each mini-slot is recorded as a second set of symbol positions; the second set of symbol positions is different from the first set of symbol positions.
The apparatus according to claim 15 or 16, further comprising: a fourth module for transmitting an indication of a maximum channel occupation time MCOT or a start position of the channel occupation time COT.
A signal receiving device, characterized by comprising

a first module for receiving a signal;

a second module, configured to process a received signal according to a combination of allowed mini-slots on at least one or more time domain resources of less than one slot slot; the allowed mini-slot combination includes one or more Mini-slot; the starting symbol position of each mini-slot in the allowed mini-slot combination, recorded as the first set of symbol positions.
The device according to claim 21,

The first set of symbol locations is one or more of the following set of symbol locations:

{1,3,7},{3,7,10},{3,7},{7,10},{5,7,12},{5,7},{7,12}.
A device according to claim 21 or 22,

The first set of symbol positions is a plurality of;

The apparatus also includes receiving an indication of the first set of symbol locations currently in use.
The device according to claim 21 or 22, further comprising:

a third module for receiving a complete slot or other combination of mini-slots on one or more 14-symbol time domain resources, the start of each mini-slot of the combination of the other mini-slots The symbol position is recorded as a second set of symbol positions; the second set of symbol positions is different from the first set of symbol positions.
The apparatus according to claim 21 or 22, further comprising: a fourth module, configured to receive an indication of a maximum channel occupation time MCOT or a start position of a channel occupation time COT.
The device according to claim 21 or 22, wherein the signal is a downlink signal, and the second module is specifically configured to:

Detecting whether there is control signaling on symbol 0 or 0, 1 or 0, 1 and 2 in the slot; (201)

When the control signaling is not retrieved on symbol 0 or symbol 0, 1 or symbols 0, 1 and 2, in at least one time slot resource, at least in the first symbol position set Whether there is control signaling (202) on consecutive n symbols from the symbol, n is 1 or 2 or 3 to determine the combination of the received mini-slots.
The apparatus according to claim 21 or 22, wherein said signal is an uplink signal, said apparatus comprising a fifth module, for:

The demodulation reference signal DMRS is sequentially detected on each symbol of the first symbol position set.
The apparatus of claim 24, wherein said signal is an uplink signal, said apparatus comprising a sixth module for:

On each of the symbols of the first set of symbol positions and the second set of symbol positions, the demodulation reference signal DMRS is sequentially detected to determine a combination of the received mini-slots.