WO2018059179A1 - Unlicensed spectrum channel occupation method and device - Google Patents

Abstract

An unlicensed spectrum channel occupation method and device. The method comprises: a network side device generates first control information, the first control information being used for indicating channel occupation parameters in at least one COT; the network side device sends the first control information to at least one terminal device, so that the at least one terminal device communicates with the network side device in the at least one COT according to the first control information. By means of the present solution, the signaling overhead of dynamically notifying channel occupation parameters is reduced, and the terminal device can also know the full view of channel occupation configuration during channel occupation, and then flexibly adjusts monitoring on a downlink channel according to the channel occupation parameters of finer granularity provided by the first control information, so that the terminal device reduces the monitoring on the downlink channel, and the power consumption of the terminal device is correspondingly reduced.

Description

Method and device for occupying unlicensed spectrum channel Technical field

The present application relates to the field of wireless communication technologies, and in particular, to an unlicensed spectrum channel occupation method and device.

Background technique

In a communication system based on unlicensed spectrum deployment, each node judges its busy state through the amount of received power on the unlicensed spectrum. If the received power is less than a certain threshold, it is considered that there is no interference source on the unlicensed spectrum and is in an idle state. Then, the signal can be sent on the unlicensed spectrum. This mechanism of first listening and then sending is called Listening and Listening (English full name: Listen Before Talk, English abbreviation: LBT), which can avoid the use of non-nodes between nodes. Conflicts when licensing spectrum resources. Since each node uses/shares radio resources in a competitive manner, the transmission start time on the unlicensed spectrum is not fixed, and the frequency domain channel width occupied by each transmission also varies with the channel idle evaluation result. However, the maximum channel occupation time of one transmission at the same time is also limited, and it is impossible to dynamically indicate to each node the duration of each channel occupation.

At present, in a wireless fidelity technology (Wi-Fi) system, control information including a transmission opportunity (English full name: Transmit Opportunity, English abbreviation: TXOP) is carried in each packet header, and the TXOP is used to indicate the data packet. The bandwidth used for transmission, the length of time this packet is transmitted, and the length of the remaining TXOP after the end of this packet. Although the remaining TXOP duration can dynamically update the indication, but cannot dynamically indicate the uplink and downlink configuration of the subframe in the remaining channel occupation time, the node still needs to continuously monitor the control information and cannot enter the energy saving mode.

Since the channel occupancy parameters occupied by each channel will change, the current TXOP mechanism cannot be notified to each node dynamically and quickly, which is not conducive to communication between nodes, and can not better adapt to changing channels. /business.

Summary of the invention

The present invention provides a method and a device for occupying an unlicensed spectrum channel, which can solve the problem that the notification mechanism of the channel occupancy parameter in the prior art cannot adapt to a channel or service that changes rapidly.

In the method for the unlicensed spectrum channel occupation provided by the first aspect, the network side device acquires the control right of the channel, and then generates first control information, where the first control information is used to indicate a channel occupation parameter in the at least one COT. The channel occupancy parameter may include at least one of the following information elements:

a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information.

The information element first COT refers to any COT in at least one COT. If the first COT refers to the last COT, the indicated channel occupancy parameter in the first COT is only available in the first COT. Data transmission; if the first COT does not refer to the last COT, the indicated channel occupancy parameter in the first COT may be used only for data transmission in the first COT, and may also be used after the first COT. Data transmission in several COTs, the embodiment of the present application does not indicate channel occupancy parameters for data transmission in the first COT The number of COTs available for control is limited.

The frequency domain parameters used for transmitting signals within the first COT primarily include the maximum channel frequency domain bandwidth used for transmitting signals within the first COT and the frequency domain subband parameters used within the first COT. By indicating the frequency domain subband parameters to the terminal device, the terminal device can obtain the frequency domain parameters accurately and quickly, thereby performing uplink transmission and downlink reception, and improving uplink/downlink transmission efficiency.

The time domain unit structure within the first COT refers to: the type of the time domain unit structure within the first COT, and/or the length of the time domain unit structure within the first COT. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can be configured to listen to the downlink channel only when the downlink time domain unit is used, thereby reducing power consumption, and according to the time domain unit structure in the first COT. The uplink transmission is performed in the uplink time domain portion to achieve the purpose of optimizing the uplink transmission and downlink reception mechanisms of the terminal device.

The first transmission trigger information is used to trigger the one-time COT transmission, so that the terminal device can perform uplink transmission after receiving the first transmission trigger information, and the first transmission trigger information can be specifically used for: In the first COT triggered by the network side device, the terminal device uses an LBT contention channel whose duration is lower than a first threshold. The first transmission trigger information may be a specific random sequence, such as a synchronization sequence or a preamble sequence.

And then, the network side device sends the generated first control information to the at least one terminal device, so that the at least one terminal device can perform, in the at least one COT, with the network side device according to the first control information. Communication. Optionally, the network side device may send the first control information from a downlink transmission start time in the first COT. In addition, the foregoing first control information may also be sent by using the common control signaling or the terminal device-specific control signaling or the downlink control signaling of the authorized channel, and the purpose of reducing the terminal device blindly detecting the first control information may be achieved.

Compared with the existing mechanism, in the embodiment of the present application, the network side device sends the first control information for indicating the channel occupation parameter in the at least one COT to the at least one terminal device, and reduces the dynamic notification channel occupation parameter. The overhead is enabled to enable the terminal device to know the channel occupancy configuration during the channel occupation, and then flexibly adjust the monitoring of the downlink channel according to the finer-grained channel occupancy parameter provided by the first control information, thereby facilitating the terminal device to reduce the pair. The monitoring of the downlink channel reduces the power consumption of the terminal device accordingly.

In order to enable more terminal devices to monitor the first control information, and accurately and quickly locate the time-frequency location of the first control information, the first control information may also be agreed to be controlled by public control signaling or terminal equipment. Downlink control signaling of the signaling or the authorized channel, thereby increasing the probability that the terminal device receives the first control information, and the terminal device only needs to receive the first control information at a predefined time-frequency location, thereby reducing the terminal The device blindly detects the operation of the first control information, and accordingly reduces the power consumption of the terminal device.

In some application scenarios, the network side device obtains control of the channel mainly through the following two methods:

A. The network side device obtains the control right by itself.

Before the network side device performs downlink transmission, the network side device competes with the first channel through the LBT, and after successfully competing for the first channel, the downlink transmission may be performed through the first channel that is contending, and the first channel is also generated. Control information and deliver it to at least one terminal device.

Alternatively, when the terminal device has an uplink transmission requirement, the network side device competes with the first channel through the LBT, and after successfully competing for the first channel, the first control information may be generated, and the first control information is sent to at least one a terminal device, and separately sent to each terminal device, to indicate that the terminal device performs uplink transmission The uplink transmits the authorization information, so that each terminal device performs uplink transmission on the time-frequency resource indicated by the uplink transmission authorization information.

B. The control right transferred by the terminal device to the network side device

After the terminal device obtains the control right of the first channel by using the LBT, the first channel is used for uplink transmission, and the uplink transmission of the terminal device may carry the second transmission trigger information, and the terminal may also carry the second transmission trigger information. The uplink transmission of the device acts as an operation to trigger a COT transmission.

In the method for unlicensed spectrum occupation provided by the second aspect, the terminal device receives the first control information sent by the network side device, where the first control information is used to indicate a channel occupation parameter in the at least one COT. The first control information may include at least one of the following information elements:

a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information.

The information element first COT refers to any COT in at least one COT. If the first COT refers to the last COT, the indicated channel occupancy parameter in the first COT is only available in the first COT. Data transmission; if the first COT does not refer to the last COT, the indicated channel occupancy parameter in the first COT may be used only for data transmission in the first COT, and may also be used after the first COT. For the data transmission in several COTs, the embodiment of the present application does not limit the number of COTs that can be used for control to indicate that the channel occupancy parameter of the data transmission in the first COT is used.

The frequency domain parameters used for transmitting signals within the first COT primarily include the maximum channel frequency domain bandwidth used for transmitting signals within the first COT and the frequency domain subband parameters used within the first COT. By indicating the frequency domain subband parameters to the terminal device, the terminal device can obtain the frequency domain parameters accurately and quickly, thereby performing uplink transmission and downlink reception, and improving uplink/downlink transmission efficiency.

The time domain unit structure within the first COT refers to: the type of the time domain unit structure within the first COT, and/or the length of the time domain unit structure within the first COT. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can be configured to listen to the downlink channel only when the downlink time domain unit is used, thereby reducing power consumption, and according to the time domain unit structure in the first COT. The uplink transmission is performed in the uplink time domain portion to achieve the purpose of optimizing the uplink transmission and downlink reception mechanisms of the terminal device.

The first transmission trigger information is used to trigger the one-time COT transmission, so that the terminal device can perform uplink transmission after receiving the first transmission trigger information, and the first transmission trigger information can be specifically used for: In the first COT triggered by the network side device, the terminal device uses an LBT contention channel whose duration is lower than a first threshold. The first transmission trigger information may be a specific random sequence, such as a synchronization sequence or a preamble sequence.

The terminal device communicates with the network side device in the at least one COT according to the first control information.

In the following cases, the terminal device may actively contend for the channel:

1. Passing the LBT competition channel by itself, after the channel is contending to the channel, the control right of the channel can be transferred to the network side device, and then the first control information is configured by the network side device.

2. When the following situations occur, the terminal device actively competes for the first channel to obtain control of the first channel, for example, a time domain unit for transmitting signals in the second COT in the at least one COT. Structure When there is no downlink time domain part, or when the downlink time domain part in the time domain unit structure for transmitting signals in the COT (for example, the first COT) triggered by the network side device cannot be used for the second transmission trigger information, the terminal device If the terminal device fails to complete the uplink transmission in the COT triggered by the network side device, the terminal device may contend for the channel through the LBT after the COT triggered by the current network side device ends, and after the contention channel succeeds. Perform an upstream transmission to trigger a new COT transmission.

3. The network side device informs in advance the certain channel occupation parameters required for the subsequent transmission of the terminal device. Then, the terminal device can compete for the channel through the LBT, and carry the second transmission trigger information in the uplink transmission after the channel competition succeeds.

In the above three cases, after the terminal device obtains the control right of the channel, the terminal device may transfer the control right of the channel to the network side device, for example, the manner in which the terminal device transmits the uplink, and carries the first in the uplink transmission. Two transmission trigger information, the second transmission trigger information is used to notify the network side device and/or the another terminal device: the uplink transmission of the first one of each of the at least one third COT The initial transmission time of the terminal device is used as the uplink trigger time. Therefore, after obtaining the control right of the channel, the network side device generates corresponding control information and sends the corresponding control information to each terminal device. Certainly, the terminal device may send the second transmission trigger information to the terminal device adjacent to its physical location by means of a similar discovery signal, triggering the terminal device to use the LBT contention channel whose duration is lower than the first threshold, and at the terminal The uplink transmission is performed in at least one third COT triggered by the device. Of course, the second transmission trigger information may not be sent, and the purpose of triggering the uplink transmission of the terminal devices may also be achieved.

It should be noted that, the control right of the terminal device to actively contend for the channel needs to use the LBT contention channel whose duration is higher than the second threshold, wherein the length of the LBT whose duration is higher than the second threshold and the random backoff when the terminal device monitors the channel The duration is related. It can be seen that by specifying the random backoff duration of each terminal device to monitor the channel, it is possible to ensure that the multi-user simultaneous transmission is performed in an orderly manner, thereby improving the transmission efficiency of simultaneous transmission by multiple users.

In other application scenarios, the terminal device may perform uplink transmission in the at least one fourth COT after the other terminal device actively contends for the channel, in addition to the foregoing active contention channel for uplink transmission, as follows:

Receiving, by the terminal device, second control information sent by the network side device, where the second control information indicates a channel occupation parameter in the at least one fourth COT triggered by the another terminal device, and another terminal device triggers at least one fourth COT transmission The flow of the process and the terminal device actively contending for channel control rights is not described here.

Then, the terminal device may, according to the channel occupancy parameter in the at least one fourth COT indicated by the second control information, in the at least one fourth COT indicated by the second control information, and the network side The device communicates.

In addition, the foregoing first control information and the second control information are sent by using common control signaling or terminal device-specific control signaling or downlink control signaling of an authorized channel, which can reduce the purpose of blindly detecting the first control information by the terminal device.

The third aspect of the present application provides a network side device having a function of implementing a method corresponding to the unlicensed spectrum channel occupation provided by the above first aspect. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above, which may be software and/or hardware.

In a possible design, the network side device includes:

a processing module, configured to generate first control information, where the first control information is used to indicate a channel occupation parameter in the at least one COT;

a transceiver module, configured to send the first control information generated by the processing module to the at least one terminal device, so that the at least one terminal device is in the at least one with the network side device according to the first control information Communication within the COT.

In a possible design, the network side device includes:

Interconnected processors, transceivers, and memories;

The memory is used to store program code, and the processor is configured to invoke program code in the memory to execute the technical solution described in the first aspect.

A fourth aspect of the present application provides a terminal device having a function of implementing a method corresponding to the unlicensed spectrum channel occupation provided by the second aspect. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above, which may be software and/or hardware.

In a possible design, the terminal device includes:

a transceiver module, configured to receive first control information sent by the network side device, where the first control information is used to indicate a channel occupation parameter in the at least one COT;

And a processing module, configured to use the transceiver module to communicate with the network side device in the at least one COT according to the first control information received by the transceiver module.

In a possible design, the terminal device includes:

Interconnected processors, transceivers, and memories;

The memory is used to store program code, and the processor is configured to invoke program code in the memory to perform the technical solution described in the second aspect.

Compared with the prior art, in the solution provided by the present application, the network side device sends the first control information for indicating the channel occupation parameter in the at least one COT to the at least one terminal device, which reduces the dynamic notification channel occupation parameter. The signaling overhead further enables the terminal device to know the full view of the channel occupancy configuration during the channel occupation, and then flexibly adjust the monitoring of the lower channel according to the finer-grained channel occupancy parameter provided by the first control information, thereby facilitating the reduction of the terminal device. For the monitoring of the downlink channel, the power consumption of the terminal device is correspondingly reduced.

DRAWINGS

FIG. 1 is a schematic flowchart of a method for occupying an unlicensed spectrum channel in the embodiment;

2 is a schematic diagram of a structure of a time domain unit in the embodiment;

FIG. 3 is another schematic diagram of a time domain unit structure in the embodiment; FIG.

4 is another schematic diagram of a time domain unit structure in the embodiment;

FIG. 5 is another schematic diagram of a time domain unit structure in the embodiment; FIG.

FIG. 6 is a schematic structural diagram of a network side device in this embodiment;

FIG. 7 is a schematic structural diagram of a terminal device in the embodiment;

FIG. 8 is a schematic structural diagram of a physical device for implementing a method for occupying an unlicensed spectrum channel in this embodiment. Figure.

detailed description

The present application provides a method and a device for occupying an unlicensed spectrum channel, which are mainly used for an unlicensed spectrum, and can provide a finer-grained channel occupancy parameter for a terminal device, so that the terminal device can know the full view of the channel occupation configuration during the channel occupation period. Therefore, the terminal device is reduced in listening to the downlink channel, and the power consumption of the terminal device is correspondingly reduced.

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments, based on All other embodiments obtained by those skilled in the art without departing from the inventive scope are the scope of the present application.

The terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or modules is not necessarily limited to Those steps or modules, but may include other steps or modules not explicitly listed or inherent to such processes, methods, products or devices, the division of the modules presented herein is merely a logical division. There may be additional divisions in the implementation of the actual application, for example, multiple modules may be combined or integrated into another system, or some features may be ignored, or not executed, and the displayed or discussed mutual coupling. The direct coupling or the communication connection may be through some interfaces, and the indirect coupling or communication connection between the modules may be electrical or the like, which is not limited herein. Moreover, the modules or sub-modules described as separate components may or may not be physically separated, may not be physical modules, or may be distributed to multiple circuit modules, and some or all of them may be selected according to actual needs. The module implements the purpose of the solution of the embodiments of the present application.

In the following, some concepts that may be involved in the embodiments of the present application are briefly introduced.

LBT: is a mechanism to avoid collisions between nodes when using unlicensed spectrum resources. Specifically, because communication systems deployed on unlicensed spectrum usually use/share radio resources based on contention, Before sending a signal, each node of the jurisdiction first listens to whether the unlicensed spectrum is idle. For example, the busy power state is determined by the size of the received power on the unlicensed spectrum. If the received power is less than a certain threshold, it is considered that there is no unlicensed spectrum. If the interference source is in an idle state, the signal can be sent on the unlicensed spectrum, otherwise the signal is not sent.

The maximum channel occupation time (English name: Maximum Channel Occupancy Time, English abbreviation: MCOT): indicates the maximum value of the channel occupation time (English full name: Channel Occupancy Time, English abbreviation: COT). The size of the MCOT is limited by the type of traffic of the data being transmitted and the usage regulations of the unlicensed spectrum occupied.

Time domain unit: refers to a predefined time domain structure. The time domain structure divided in the time domain is not limited in this application. The structure of the time domain unit mainly includes: full downlink time domain structure, full uplink time domain structure, and start The downlink self-contained time domain structure and the initial uplink self-contained time domain structure. The time domain unit can be called a subframe, a slot, a minislot. (mini-slot) or other similar name that can be used to represent a time domain resource. Taking a subframe as an example, the length of one subframe can be 1 ms. Taking a time slot as an example, a OFDM (Orthogonal Frequency-Division Multiplexing) symbol may be included in one slot, or 14 OFDM symbols may be included in one slot; The number of OFDM symbols included in one minislot is smaller than the OFDM symbols included in one slot.

The network side device in the present application is a device for accessing a terminal device to a wireless network, and may be referred to as a base station, including but not limited to: an evolved Node B (English name: evolved Node Base, English abbreviation: eNB), Radio network controller (English name: Radio Network Controller, English abbreviation: RNC), node B (English name: Node B, English abbreviation: NB), base station controller (English full name: Base Station Controller, English abbreviation: BSC), Base transceiver station (English name: Base Transceiver Station, English abbreviation: BTS), home base station (for example, Home evolved NodeB, or Home Node B, English abbreviation: HNB), baseband unit (English full name: BaseBand Unit, English abbreviation: BBU ).

The terminal device (Terminal Device) referred to in the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. The terminal device can communicate with one or more core networks via a radio access network (English name: Radio Access Network, English abbreviation: RAN), and the terminal device can be a mobile terminal, such as a mobile phone (or "cellular" phone). And a computer having a mobile terminal, for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network. For example, personal communication service (English name: Personal Communication Service, English abbreviation: PCS) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, personal digital assistant (English full name: Personal Digital Assistant, English abbreviation: PDA) and other equipment. A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point. Remote Terminal, Access Terminal, User Terminal, Terminal Device, User Agent, User Device, or User Equipment.

Since the network side device or the terminal device obtains the unlicensed spectrum based on the competition, the channel occupancy parameters such as the channel occupation duration and the channel occupied bandwidth of the unlicensed spectrum are not static, so that the terminal device knows the current channel occupancy parameter in time, and The communication between the terminal device and the network side device is more advantageous. The following technical solutions provide the following channel solutions:

The network side device acquires control of the channel, and then determines a COT that occupies the channel, and generates control information for indicating a channel occupancy parameter in the at least one COT, and sends the generated control information to the at least one terminal device. The terminal device indicates the fine-grained channel occupation parameters, so that the terminal devices can perform uplink transmission and downlink reception according to the fine-grained channel occupancy parameters, and one of the benefits is that the terminal device only needs to monitor the channel. When the channel is monitored, the power consumption of the terminal device is reduced.

Referring to FIG. 1 , the following provides a method for the unlicensed spectrum channel occupation in the present application. In an unlicensed spectrum scenario, the network side device needs to schedule the spectrum resources therein, and the network side device obtains the first channel. After the control, the control information of the first channel is sent to each terminal device, so that each terminal device can determine the time-frequency location of receiving the downlink scheduling information, thereby performing downlink receiving according to the downlink scheduling information. The right to receive data, and to send data according to the uplink sending authorization in the downlink scheduling information. The embodiments of the present application specifically include:

101. The network side device generates first control information.

The first control information is used to indicate a channel occupancy parameter in at least one COT. Considering that the channel occupancy parameters in each COT of the unlicensed spectrum based on the contention acquisition are different, the first control information may include only common control information for describing the common channel occupancy parameter in the current COT, and/or Or, the common control information including the common channel occupation parameter used in the one or more consecutive COTs may be included, or may include only the private control information used to describe the channel occupancy parameter in the current COT, or may be included only for The private control information describing the channel occupancy parameters in a subsequent COT may also include the common control information and the private control information.

Specifically, the first control information may indicate that the terminal device occupies the first channel in one COT, and may also instruct the terminal device to occupy the first channel in the subsequent COT. The first control information may be used only for controlling the terminal device to occupy the first channel in the current COT; and may also be used to control the terminal device to occupy the first channel in consecutive multiple COTs; or only when the terminal device is first notified The terminal device is notified of how to occupy the first channel in the first COT, and the subsequent COT does not separately notify the terminal device, but the control information in the first COT is used to occupy the first channel by default. The control information in this application is for each channel occupation, and the control information of the channel occupied by the terminal device after each LBT changes correspondingly according to the change of the service type and the like. Therefore, the network side device needs to be changed according to The change of the service type dynamically generates a control information, and each time the control right of the channel is obtained, the generated control information can be generated to the terminal device.

The following describes the channel occupancy parameters indicated by the first control information:

The channel occupancy parameter may include at least one of the following information elements:

a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information.

The information element first COT refers to any COT in at least one COT. If the first COT refers to the last COT, the indicated channel occupancy parameter in the first COT is only available in the first COT. Data transmission; if the first COT does not refer to the last COT, the indicated channel occupancy parameter in the first COT may be used only for data transmission in the first COT, and may also be used after the first COT. For the data transmission in several COTs, the embodiment of the present application does not limit the number of COTs that can be used for control to indicate that the channel occupancy parameter of the data transmission in the first COT is used. The information element first COT may be expressed in units of time such as us or ms, or may also be represented by the number of OFDM symbols included in the first COT. Exemplarily, if 10 bits are used to indicate the first COT of the information element, if the value unit is us, the first COT of the information element ranges from [0 to 1023] us; if the value unit is a symbol, the information element The first COT has a value range of [0 to 1023] symbols. In the case where the number of bits for indicating the first COT of the information element is not increased, the value range of the information element can be extended by indicating the granularity (or referred to as quantization precision). For example, when the indication granularity is 1 OFDM symbol, 2 bits (four cases [00, 01, 10, 11] in total) can represent [0, 1, 2, 3] symbols; when the indication granularity is 2 OFDM symbols 2 bits can represent [0, 2, 4, 6] symbols; when the indication granularity is 3 OFDM symbols, 2 bits can represent [0, 3, 6, 9] symbols.

Taking the information element first COT as an example of the number of OFDM symbols it contains, when the Cyclic Prefix (CP) type or length is known (for example, the default is a normal CP), the channel occupancy parameter can be Displaying or implicitly notifying the subcarrier spacing of the OFDM symbol of the terminal device, since the length of the OFDM symbol is mainly determined by the size of the frequency domain subcarrier spacing; otherwise, the channel occupancy parameter or other means needs to be notified Terminal device CP type or length. Illustratively, a manner of displaying may be that the first control information includes configuration parameters for indicating an OFDM symbol of the first COT, which may include, but is not limited to, a length, a subcarrier spacing, a CP type, or a length. At least one. An implicit manner may be that the parameter of the OFDM symbol used to represent the first COT is the same as the parameter configuration used to send the first control information, or the sub-operation corresponding to the OFDM symbol of the first COT. The carrier spacing is the same as the maximum subcarrier spacing used for the downlink transmission, or the subcarrier spacing corresponding to the OFDM symbol indicating the first COT is indicated in the frequency domain parameter used for transmitting the signal in the first COT. The maximum subcarrier spacing on each subband is the same.

The frequency domain parameters used for transmitting signals in the first COT mainly include a maximum channel frequency domain bandwidth used for transmitting signals in the first COT and frequency domain subband parameters used in the first COT, and are transmitted in the first COT. The maximum channel frequency domain bandwidth used by the signal refers to the maximum channel frequency domain bandwidth that can be used by the terminal device to transmit signals (including receiving signals from the network side device and transmitting signals to the network side device) in the first COT, and then the terminal device is in the The bandwidth that the transmission signal in the first COT can occupy can only be less than or equal to the maximum channel bandwidth indicated by the first control information.

The frequency domain subband parameter used in the first COT refers to: indication information indicating frequency band division, subcarrier spacing and cyclic prefix length on each subband, and the indication information includes the following a, b, and c. Any of the following:

a, at least one of a value of a frequency band division, a value of a subcarrier spacing on each subband, or a value of a cyclic prefix length.

b. indicating a sequence number of the frequency band division, a sequence number indicating a subcarrier spacing on each subband, or a sequence number indicating a cyclic prefix length.

c. indicating a sequence number of the preset combination, where the preset combination includes at least one of a frequency band division, a subcarrier spacing on each subband, and a cyclic prefix length.

When the terminal device performs uplink transmission and downlink reception, the network side device configures multiple frequency domain parameters for the terminal device, and then the terminal device can be indicated by a, b, or c, so that the terminal device can accurately and quickly acquire the frequency. Domain parameters, and can save signaling overhead when indicating c.

The time domain unit structure in the first COT refers to: the type of the time domain unit structure in the first COT, and/or the length of the time domain unit structure in the first COT. The time domain unit type refers to a time domain unit being a downlink time domain unit, an uplink time domain unit, a partial time domain unit, a special time domain unit (starting downlink self-contained time domain unit, or starting uplink self-contained time domain unit) Still a blank time domain unit. The time domain unit length is the duration of the time domain unit, and the length division of the time domain unit is not limited herein. If the time domain unit structure in the first COT contains the length of each time domain unit, then it is not necessary to carry the information element of the first COT. By notifying the terminal device of the time domain unit structure in the first COT, the terminal device can be configured to listen to the downlink channel only when the downlink time domain unit is used, thereby reducing power consumption, and according to the time domain unit structure in the first COT. The uplink transmission is performed in the uplink time domain part to achieve the purpose of optimizing the uplink transmission and the downlink reception mechanism of the terminal device.

The length of the time domain unit may be represented by a time unit such as us or ms, or may also be represented by an OFDM symbol included in the time domain unit, or may also be a subframe, a time slot or a micro time according to the time domain unit. The gap is expressed.

Illustratively, a manner of indicating a time domain unit structure within the first COT is to indicate at least the length of the first time domain unit within the first COT, or the length of the last time domain unit, or The length of one time domain unit and the last time domain unit may be implemented by indicating the number of OFDM symbols included in the time domain unit or other manners. In other embodiments, the network side device may also indicate other time domain units between the first time domain unit and the last time domain unit (eg, in a subframe, a time slot, or a minislot). The number of units).

In some embodiments, there are one or more guard intervals for downlink-uplink conversion (including the required transceiving conversion time between downlink transmission and uplink transmission, and time for LBT) in the first COT ( The method may be zero)), that is, when the downlink transmission and the uplink transmission are required in the first COT, a method for indicating the structure of the time domain unit in the first COT is to indicate at least the time domain of the guard interval including the downlink-uplink transition. The structure of the unit takes the time domain unit as a time slot as an example, and includes a downlink transmission part and an uplink transmission part in one time slot, and the downlink transmission part and the uplink transmission part may be a mini time slot, and the time domain unit is a time slot. And a structure comprising two minislots and one guard interval between the two minislots. In other embodiments, the network side device may further indicate a guard interval of the downlink-uplink transition or a start time of the time domain unit (such as a time slot) where the guard interval is located in the first COT, for example, relative to The time offset of the first COT start time.

The benefit of the network side device indicating to the terminal device the time domain unit structure in the first COT further includes: if the first control information indicates that one COT includes 8 subframes, except the first subframe is a downlink subframe, The rest are all uplink subframes. Then, if the terminal device does not receive the uplink transmission grant information about itself in the downlink control signaling of the first subframe, the terminal device may stop listening to the downlink from the second subframe. The channel enters the power saving or sleep mode, thereby reducing the power consumption of the terminal device.

The first transmission triggering information refers to a triggering information that can trigger a COT transmission, so that the terminal device can perform uplink transmission after receiving the first transmission triggering information, specifically, the first The transmission trigger information may be used to indicate the terminal device: in the first COT triggered by the network side device, the terminal device uses an LBT (for example, a second type LBT) that is longer than the first threshold to contend for the channel, and then performs uplink transmission. The first transmission triggering information may be a specific random sequence, such as a synchronization sequence or a preamble sequence, and may function to trigger a COT transmission, so that the terminal device can perform uplink transmission in the first COT.

The validity period of each channel occupying parameter is calculated from the sending time or ending time of the first control information carrying the channel occupying parameter.

In addition, before the network side device generates the first control information, the network side device also needs to obtain the control right of the first channel, and the manner of obtaining the control right mainly includes the following two types:

A. The network side device obtains the control right by itself.

1. Before the network side device performs downlink transmission, the network side device competes with the first channel through the LBT, and after successfully competing for the first channel, the downlink transmission may be performed through the first channel that is contending, and the foregoing manner is also generated. The first control information is sent to at least one terminal device.

2. After knowing that the terminal device has an uplink transmission requirement, the network side device competes with the first channel through the LBT, and after successfully competing for the first channel, the first control information may be generated, and the first control information is sent to at least one The terminal device, and the uplink transmission authorization information for instructing the terminal device to perform uplink transmission to each terminal device, so that each terminal device performs the time-frequency resource indicated by the uplink transmission authorization information. Send upstream.

After the network side device sends the first control information to each terminal device, each terminal device may use the LBT whose duration is lower than the first threshold in the COT triggered by the network side device according to the indication content of the first control information. Competing for the first channel, and then performing uplink transmission, the time domain unit structure diagram in a COT transmission triggered by the network side device may refer to FIG. 2, i is a positive integer, and data (Data) transmitted in each COT may include uplink data. And/or downstream data.

B. The control is obtained by the terminal device

The terminal device can occupy the first channel through the LBT, obtain the control right of the first channel, and then use the first channel for uplink transmission, and correspondingly triggers the primary channel occupation for the first channel.

After obtaining the control right of the first channel, the terminal device triggers the terminal device adjacent to the physical location of the terminal device to perform uplink transmission, and mainly includes the following three (1), (2), and (3):

(1) The terminal device may transfer the right of resource allocation of the first channel to the network side device, so that the network side device can control the first channel. After obtaining the control right, the network side device first generates the foregoing first control information, and then sends the first control information to each terminal device in a time domain unit that can perform downlink transmission after the terminal device performs uplink transmission. In the above case (1), since the network side device has obtained the control right, the terminal device that receives the first control information can use the LBT whose duration is lower than the first threshold to compete for the first channel, for each The physical location between the terminal devices is not required, and may or may not be adjacent to each other.

As shown in FIG. 3, in the scenario in which the terminal device triggers the COT transmission, after the network side device obtains the control right of the channel, the time for issuing the control information may be as shown in FIG. 3, and FIG. 3 is the COTi triggered by the terminal device. The time domain unit structure, the DL Trigger of FIG. 3 represents the first control information sent by the network side device in the first downlink time domain part of the terminal device after the initial uplink transmission, and the DL Trigger may include the current COTi. For the remaining time indication information, the data (Data) transmitted in the COTi may include uplink data and/or downlink data.

(2) The terminal device sends the second transmission trigger information, so that the terminal device adjacent to the physical location of the terminal device is triggered to perform uplink transmission, and may be sent to other terminals adjacent to the physical location of the terminal device by means of a similar discovery signal. The second transmission trigger information of the device may be carried in an uplink signal sent by the terminal device.

(3) The terminal device does not send the second transmission triggering information, but the terminal device adjacent to the physical location of the terminal device regards the uplink transmission of the terminal device as a trigger for the primary channel occupation, so that the uplink transmission of the terminal device can The terminal device adjacent to the physical location of the terminal device is triggered to perform uplink transmission.

In the case of (3), as shown in FIG. 4, the time domain unit structure in at least one COT occupied by the channel triggered by the terminal device is arranged in the time domain ascending order from left to right, and FIG. 4 is the time domain unit structure in the first COT1. , indicating the initial uplink transmission of the terminal device, and another terminal device may use the uplink transmission of the terminal device in FIG. 4 as the DL Trigger, and contend for the channel through the LBT in the COT1, and the subsequent terminal device triggers the COT transmission to be the same, Let me repeat. The other terminal device may be a plurality of terminal devices, and each of the plurality of terminal devices may use a shorter LBT to compete for the channel, and the channel may be contending through the LBT, and then the uplink transmission may be performed.

In the above two cases (2) and (3), the terminal device adjacent to the physical location of the terminal device only needs to use the LBT whose duration is lower than the first threshold to compete for the first channel.

For the scenario of the COT triggered by the terminal device, the terminal device uses the first channel in the at least one third COT, and sends the uplink signal to the network side device, and after the network side device obtains the control right, the other terminal sets The first control information sent by the network side device is also received, and then the other terminal device competes with the first channel through the LBT whose duration is lower than the first threshold in the corresponding at least one third COT, and is in the terminal. Uplink transmission and/or downlink reception are performed in at least one third COT triggered by the device, and the physical location of the other terminal device is in the vicinity of the foregoing terminal device.

It can be seen from the action of the first control information that the network side device can inform the terminal device of the channel occupancy parameter required for each subsequent transmission, and the terminal device can also carry the second transmission in the transmitted uplink signal when performing uplink transmission. The triggering information, the second transmission triggering information refers to a certain channel occupying parameter that the network side device previously informs the terminal device to transmit in advance. In the COT transmission scenario triggered by the terminal device, the terminal device may forward the second transmission triggering information to other terminals. device. The second transmission trigger information may be used to notify the network side device and/or other terminal device: the initial transmission of the terminal device that performs uplink transmission in the first one of each of the at least one third COT that is triggered this time. Time is used as the uplink trigger time. Alternatively, the second transmission trigger information may not be carried, and the uplink transmission initiated by the terminal device may also function as the second transmission trigger information. Optionally, if the channel occupied by the terminal device is the same as the previously occupied channel, some common channel occupancy parameters in the second transmission trigger information are still changed because each channel occupies a channel to change certain channel occupancy parameters. The first control information that is sent before the network side device can be sent.

It should be noted that the situation in which the terminal device competes with the first channel mainly depends on the following categories:

1. The terminal device can directly compete for the first channel.

2. When the following situations occur, the terminal device actively competes for the first channel to obtain control of the first channel, for example, a time domain unit for transmitting signals in the second COT in the at least one COT. When the downlink time domain part does not exist in the structure, or when the downlink time domain part in the time domain unit structure for transmitting signals in the COT (for example, the first COT) triggered by the network side device cannot be used for the second transmission trigger information, the terminal The device can go to the contending channel, or when the terminal device cannot complete the uplink transmission in the COT triggered by the network side device, the terminal device can contend for the channel through the LBT after the CNT triggered by the current network side device ends, and succeed in the contention channel. After the uplink transmission, a new COT transmission is triggered.

3. The network side device informs in advance the certain channel occupation parameters required for the subsequent transmission of the terminal device. Then, the terminal device can compete for the channel through the LBT, and carry the second transmission trigger information in the uplink transmission after the channel competition succeeds.

In addition, for the COT transmission triggered by the terminal device, the terminal device needs to compete for the channel through the LBT (for example, the fourth type LBT) whose duration is higher than the second threshold, so that a new COT transmission can be triggered. In the scenario where there are many uplink services, if the terminal devices spontaneously pass the LBT to contend for the channel, this will affect the transmission efficiency. Therefore, in order to ensure simultaneous transmission by multiple users, the terminal device can be restricted by the LBT to contend for the channel. For example, the random backoff duration of each terminal device listening channel may be specified. Correspondingly, the length of the LBT whose duration is higher than the second threshold is related to the random backoff duration when the terminal device monitors the channel, and each terminal is specified. The random backoff duration of the device listening channel can ensure that multiple users transmit in an orderly manner at the same time, thereby improving the transmission efficiency of simultaneous transmission by multiple users.

After the network side device obtains the control right of the first channel, the COT of the first channel may be determined, and then the control information is generated and sent to the terminal device, where the COT indicated in the control information sent for the first time in the current COT is occupied by the entire channel. The duration of the channel indicated in the control information sent in the subsequent data transmission refers to the remaining duration of the current COT. In addition, within the control information sent by each data transmission within a COT The contents can be the same or different.

102. The network side device sends the first control information to the at least one terminal device.

The first control information may be sent by using common control signaling or terminal device-specific control signaling or downlink control signaling of an authorized channel, where the common control signaling or terminal device dedicated control signaling or downlink control of an authorized channel The signaling includes a control field, where the control field is used to carry the first control information, and the first control information carried by the control field may be marked as DL Trigger.

The first control information may be sent from a downlink transmission start time of the first COT, for example, a downlink time domain partial transmission in a time domain unit for transmitting a signal in the first COT, or in the first COT The start time, or the initial downlink transmission time after the initial uplink transmission in the first COT, or the initial downlink time domain after the initial uplink transmission in the first COT.

For example, a network-side device triggers a COT transmission scenario. The network-side device can use the initial uplink self-contained time domain unit structure, the downlink time domain unit structure, or the downlink self-contained time domain unit structure. For details, refer to FIG. 5. 5 is a time domain unit structure in at least one COT, arranged from left to right in time domain increasing order, i is a positive integer in the figure, and data (Data) transmitted in each COT may include uplink data and/or downlink. data. (a) in FIG. 5 is a time domain unit structure (ie, a downlink time domain unit structure) in the i-th COT, and the DL Trigger in the i-th COT is after the LBT, and before the downlink data transmission, and DL Trigger Indicates the full length of the COT.

(b) in FIG. 5 is a time domain unit structure in the (i+1)th COT (ie, a start uplink self-contained time domain unit structure), and DL Trigger in (b) in FIG. 5 indicates that the network side device is in the The control information delivered by the terminal device in the first downlink time domain part after the initial uplink transmission, and the DL Trigger indicates the remaining duration of the COT. Of course, the time domain location in which control information is transmitted within each COT may vary depending on the structure of the time domain unit.

In addition, since the information transmitted in the DL trigger includes the most basic channel occupancy parameter in the COT, a default time-frequency structure can be used to transmit the DL trigger, so that more terminal devices can understand the DL trigger. For example, the frequency domain location and the subcarrier spacing of the channel used for transmitting the DL trigger are pre-configured to a fixed value, and the DL trigger may also be carried in a periodic discovery signal (English name: Discovery Signal, English abbreviation: DRS). The domain unit is either carried in the system broadcast message or may be indicated by downlink control signaling of the grant channel.

The at least one terminal device may include at least one terminal device that uses the same time domain resource and different frequency domain resources, may include at least one terminal device that uses different time domain resources and the same frequency domain resource, and may further include using different time domain resources and At least one terminal device of different frequency domain resources. The terminal equipment using the same time domain resource performs uplink transmission in the same uplink time domain part in the same at least one COT.

It should be noted that, in this application, the network side device may continue to send the first control information in one COT, so as to prevent some terminal devices from not listening to the first control information when initializing the channel.

103. The at least one terminal device and the network side device communicate in the at least one COT according to the first control information.

Each of the at least one terminal device may receive the first control information, where the control information may be simultaneously sent to the at least one terminal device when the initial delivery is performed, and may also be a broadcast message in the subsequent communication interaction. Or a periodic signal or the like is sent to at least one terminal device.

If the terminal device does not complete the uplink transmission in the first COT, the network side device may further Determining to use at least one COT of the first channel, and then transmitting corresponding control information to the at least one terminal device, where the control information is a channel occupancy parameter in the determined at least one COT, such that the at least one terminal device is configured according to The control information communicates with the network side device in at least one of the currently determined COTs. The control information may be the same as or different from the previous first control information, and may be a channel occupation parameter for the same channel (the first channel) or a different channel (the other channel), and the specific channel occupancy parameters are not limited. .

In addition, in the above-mentioned terminal device performing uplink transmission in the COT triggered by itself, the uplink transmission may also be performed in the COT triggered by another terminal device, and the flow of the specific another terminal device triggering the COT transmission is described in the foregoing part. The control of the first channel is obtained by the terminal device to trigger a new COT transmission process, which is not described in detail. Correspondingly, after another terminal device triggers one COT transmission for the second channel, the other terminal device also transfers control of the second channel to the network side device, and the network side device generates a corresponding second control. The information is then sent to the terminal device (including the terminal device and the other terminal device). The channel occupancy parameter carried in the second control information may be referred to the description of the first control information, and details are not described herein. . Then, after receiving the second control information, the terminal device may, according to the channel occupancy parameter in the at least one fourth COT indicated by the second control information, in the at least one fourth COT indicated by the second control information, The network side device communicates.

Compared with the existing mechanism, in the embodiment of the present application, the network side device sends the first control information for indicating the channel occupation parameter in the at least one COT to the at least one terminal device, and reduces the dynamic notification channel occupation parameter. The overhead is enabled to enable the terminal device to know the channel occupancy configuration during the channel occupation, and then flexibly adjust the monitoring of the downlink channel according to the finer-grained channel occupancy parameter provided by the first control information, thereby facilitating the terminal device to reduce the pair. The monitoring of the downlink channel reduces the power consumption of the terminal device accordingly.

When there are multiple cells, if the terminal device receives channel occupancy parameters in other cells' COTs, then in order to reduce transmission interference or channel resource occupation conflict, the terminal device may determine that it is within a COT according to the channel occupancy parameters. Which time domain units can not perform uplink transmission, wait for the COT to end, and then perform LBT to trigger a new COT.

Correspondingly, when there are multiple cells, if the network side device receives the channel occupancy parameter in the other cell's COT, the network side device can determine that it is in accordance with the channel occupancy parameters to reduce the transmission interference or the channel resource occupation conflict. Which time domain units in a COT can occupy the channel resources, and can wait for the end of the COT before performing the LBT occupation channel.

The method for occupying an unlicensed spectrum in the present application is described above. The network side device and the terminal device that perform the foregoing method are respectively described below. In any of the foregoing scenarios shown in FIG. 1 to FIG. 5, the channel occupation parameter, the transmission time, the transmission mode, and the control function of the first control information and the second control information, the first transmission trigger information, the second transmission trigger information, and the like may be used. Applicable to the network side device 60 and the terminal device 70 described below, and details are not described herein again.

The network side device 60 is described with reference to FIG. 6. The network side device 60 includes:

The processing module 601 is configured to generate first control information, where the first control information is used to indicate a channel occupation parameter in the at least one COT;

The transceiver module 602 is configured to send the first control information to the at least one terminal device, so that the at least one The terminal devices communicate with the network side device in the at least one COT according to the first control information.

2. Referring to FIG. 7, the terminal device 70 is described. The terminal device 70 includes:

The transceiver module 701 is configured to receive first control information that is sent by the network side device, where the first control information is used to indicate a channel occupation parameter in the at least one COT.

The processing module 702 is configured to use the transceiver module to communicate with the network side device in the at least one COT according to the first control information received by the transceiver module 701.

The processing module 702 is further configured to use an LBT contention channel whose duration is higher than a second threshold;

The length of the LBT whose duration is higher than the second threshold is related to the random backoff duration when the terminal device listens to the channel.

In some embodiments of the invention, the processing module 702 is further configured to:

When a time domain unit structure for transmitting a signal in the second COT in the at least one COT does not have a downlink time domain portion, or a downlink time in a time domain unit structure for transmitting a signal in the first COT When the domain part cannot be used for the second transmission trigger information, the channel or another channel is used in the at least one third COT, and the uplink signal is sent to the network side device by the transceiver module 701 to make another terminal The device uses the LBT whose duration is lower than the first threshold to compete for the channel or the another channel, and performs uplink transmission within the at least one third COT.

The uplink signal carries the second transmission trigger information, where the second transmission trigger information is used to notify the network side device and/or the another terminal device: in the at least one third COT The initial transmission time of the first terminal device that performs uplink transmission in each COT is used as an uplink triggering time.

In some embodiments of the invention, the processing module 702 is further configured to:

Receiving, by the transceiver module, the second control information sent by the network side device, where the second control information indicates a channel occupation parameter in the at least one fourth COT triggered by the another terminal device;

Determining at least one of the channel indication parameters in the at least one fourth COT indicated by the second control information received by the transceiver module 701 by using the transceiver module 701 in the second control information Communicate with the network side device within the four COTs.

It should be noted that, in the embodiments of the present application (including the embodiments shown in FIG. 6 and FIG. 7 ), the physical devices corresponding to all the transceiver modules may be transceivers, and the physical devices corresponding to all the processing modules may be processed. Device. Each of the devices shown in FIG. 6 and FIG. 7 may have a structure as shown in FIG. 8. When one of the devices has the structure shown in FIG. 8, the processor and the transceiver in FIG. 8 can achieve the aforementioned correspondence. The device module of the device provides the same or similar functions as the processing module and the transceiver module, and the memory code processor of FIG. 8 needs to call the program code when executing the above method of unlicensed spectrum occupation.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the module described above can refer to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and the actual implementation may have another division manner, for example, Multiple modules or components may be combined or integrated into another system, or some features may be omitted or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or otherwise.

The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English full name: Read-Only Memory, English abbreviation: ROM), a random access memory (English full name: Random Access Memory, English abbreviation: RAM), magnetic A variety of media that can store program code, such as a disc or a disc.

The technical solutions provided by the present application are described in detail above. The principles and implementation manners of the present application are described in the specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present application; In the meantime, the present invention is not limited to the scope of the present application.

Claims (32)

A method for occupying an unlicensed spectrum channel, the method comprising: The network side device generates first control information, where the first control information is used to indicate a channel occupation parameter in the at least one COT; The network side device sends the first control information to the at least one terminal device, so that the at least one terminal device communicates with the network side device in the at least one COT according to the first control information. The method according to claim 1, wherein the channel occupancy parameter comprises at least one of the following: a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information. The method according to claim 2, wherein the first control information is transmitted from a downlink transmission start time in the first COT. The method according to claim 2 or 3, wherein the first transmission triggering information is configured to: in the first COT triggered by the network side device, the terminal device uses a lower duration than the first The threshold LBT contends for the channel. The method according to any one of claims 1-4, wherein the first control information is sent by common control signaling or terminal device specific control signaling or downlink control signaling of an authorized channel. A method for occupying an unlicensed spectrum channel, the method comprising: Receiving, by the terminal device, first control information sent by the network side device, where the first control information is used to indicate a channel occupation parameter in the at least one COT; The terminal device communicates with the network side device in the at least one COT according to the first control information. The method according to claim 6, wherein the first control information comprises at least one of the following: a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information. The method according to claim 7, wherein the first control information is sent from a downlink transmission start time in the first COT. The method according to claim 7 or 8, wherein the first transmission trigger information is used to: trigger the use of the terminal device to be lower than the first time in the first COT triggered by the network side device A threshold LBT competition channel. The method of claim 9 wherein the method further comprises: The terminal device uses an LBT contention channel whose duration is higher than a second threshold; The length of the LBT whose duration is higher than the second threshold is related to the random backoff duration when the terminal device listens to the channel. The method according to any one of claims 7 to 10, wherein the method further comprises: When a time domain unit structure for transmitting a signal in the second COT in the at least one COT does not have a downlink time domain portion, or a downlink time in a time domain unit structure for transmitting a signal in the first COT When the domain part cannot be used for the second transmission triggering information, the terminal device uses the channel or another channel in the at least one third COT, and sends an uplink signal to the network side device to enable another terminal device to use. The LBT whose duration is lower than the first threshold contends for the channel or the another channel, and performs uplink transmission within the at least one third COT. The method according to claim 11, wherein said uplink signal carries said second transmission Triggering information, the second transmission triggering information is used to notify the network side device and/or the another terminal device to: perform uplink transmission on a first one of each of the at least one third COT The initial transmission time of the terminal device is used as an uplink triggering time. The method according to claim 11 or 12, wherein the method further comprises: the terminal device receiving second control information sent by the network side device, where the second control information indicates that the another terminal device triggers Channel occupancy parameters in at least one fourth COT; The terminal device performs, according to the channel occupancy parameter in the at least one fourth COT indicated by the second control information, with the network side device in the at least one fourth COT indicated by the second control information. Communication. The method according to claims 7 and 13, wherein the first control information and the second control information are sent by common control signaling or terminal device specific control signaling or downlink control signaling of an authorized channel. A network side device, where the network side device includes: a processor, configured to generate first control information, where the first control information is used to indicate a channel occupation parameter in the at least one COT; And a transceiver, configured to send the first control information to the at least one terminal device, so that the at least one terminal device communicates with the network side device in the at least one COT according to the first control information. The network side device according to claim 15, wherein the channel occupancy parameter comprises at least one of the following items: a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information. The network side device according to claim 16, wherein the first control information is sent from a downlink transmission start time in the first COT. The network side device according to claim 16 or 17, wherein the first transmission triggering information is used to: in the first COT triggered by the network side device, the terminal device usage time is lower than The LBT of the first threshold competes for the channel. The network side device according to any one of claims 15-18, wherein the first control information is sent by common control signaling or terminal device dedicated control signaling or downlink control signaling of an authorized channel. A terminal device, the terminal device includes: a transceiver, configured to receive first control information sent by the network side device, where the first control information is used to indicate a channel occupation parameter in the at least one COT; And a processor, configured to communicate with the network side device in the at least one COT by using the transceiver module according to the first control information received by the transceiver module. The terminal device according to claim 20, wherein the first control information comprises at least one of the following items: a first COT of the at least one COT, a frequency domain parameter used for transmitting a signal within the first COT, a time domain unit structure within the first COT, or first transmission trigger information. The terminal device according to claim 21, wherein the first control information is transmitted from a downlink transmission start time in the first COT. The terminal device according to claim 21 or 22, wherein the first transmission triggering information is used to trigger the terminal device to use a duration shorter than the first COT triggered by the network side device The LBT of the first threshold competes for the channel. The terminal device according to claim 23, wherein the processor is further configured to: Using an LBT contention channel whose duration is higher than a second threshold; The length of the LBT whose duration is higher than the second threshold is related to the random backoff duration when the terminal device listens to the channel. The terminal device according to any one of claims 21-24, wherein the processor is further configured to: When a time domain unit structure for transmitting a signal in the second COT in the at least one COT does not have a downlink time domain portion, or a downlink time in a time domain unit structure for transmitting a signal in the first COT When the domain part cannot be used for the second transmission trigger information, the channel or another channel is used in the at least one third COT, and the uplink signal is sent to the network side device by using the transceiver module, so that another terminal device The LBT that is longer than the first threshold is used to compete for the channel or the other channel, and uplink transmission is performed within the at least one third COT. The terminal device according to claim 25, wherein the uplink signal carries the second transmission trigger information, and the second transmission trigger information is used to notify the network side device and/or the other terminal The device: the initial transmission time of the terminal device that performs uplink transmission in the first one of each of the at least one third COT is used as an uplink triggering time. The terminal device according to claim 25 or 26, wherein the processor is further configured to: Receiving, by the transceiver module, the second control information sent by the network side device, where the second control information indicates a channel occupation parameter in the at least one fourth COT triggered by the another terminal device; Determining, by the transceiver module, the at least one fourth COT indicated by the second control information according to the channel occupancy parameter in the at least one fourth COT indicated by the second control information received by the transceiver module Communicating with the network side device. The terminal device according to claim 21 and 27, wherein the first control information and the second control information are sent by common control signaling or terminal device dedicated control signaling or downlink control signaling of an authorized channel . A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-5. A computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 6-14. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-5. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 6-14.

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