WO2021160017A1 - Determination method and sending method for occupancy of unlicensed band channel, and communication device - Google Patents

Abstract

Provided are a determination method and sending method for the occupancy of an unlicensed band channel, and a communication device. The determination method for the occupancy of an unlicensed band channel comprises: where a first signal sent by a second communication device is detected, determining that the second communication device occupies a channel, wherein the first signal is a signal supporting independent detection.

Description

Method for determining unlicensed frequency band channel occupation, sending method and communication equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010087273.X filed in China on February 11, 2020, the entire content of which is incorporated herein by reference.

Technical field

The embodiments of the present invention relate to the field of communication technologies, and in particular, to a method for determining channel occupancy of an unlicensed frequency band, a sending method, and a communication device.

Background technique

In the future communication system, the unlicensed band (Unlicensed Band) can be used as a supplement to the licensed band (Licensed Band) to help operators expand their services. When the initiating node needs to use an unlicensed frequency band to send information, it needs to do Listen Before Talk (LBT), and perform Energy Detection (ED) on the surrounding nodes. When the detected power is lower than a threshold For a limited time, the channel is considered to be empty (Idle) and the initiating node can send; otherwise, the channel is considered to be busy and the initiating node cannot send. After the initiating node starts sending, it can authorize the use of the designated channel in certain periods of the channel occupation time (Channel Occupancy Time, COT) to one or more associated responding nodes for transmission, and the responding node can only transmit when the initiating node detects Only the COT of the initiating node can be shared for transmission.

At present, when the initiating node has no data transmission, the initiating device will send some signals so that the responding device can share the COT. According to the existing signal or channel, the responding node is detecting the signal or channel location. It takes a long time, which results in the unavailability of resources within the detection time of the signal, resulting in low resource utilization.

Summary of the invention

The embodiment of the present invention provides a method for determining channel occupancy of an unlicensed frequency band, a transmission method, and a communication device to solve the existing problem of low resource utilization due to long signal or channel detection time.

In order to solve the above problems, the present invention is implemented as follows:

In the first aspect, an embodiment of the present invention provides a method for determining channel occupancy of an unlicensed frequency band, which is applied to a first communication device, and the method includes:

In the case of detecting the first signal sent by the second communication device, determining that the second communication device occupies a channel;

Wherein, the first signal is a signal that supports independent detection.

In the second aspect, an embodiment of the present invention provides a method for transmitting an unlicensed frequency band, which is applied to a second communication device, and the method includes:

When the second communication device detects that the channel is idle, sending the first signal to N first communication devices;

Wherein, the first signal is a signal that supports independent detection.

In a third aspect, an embodiment of the present invention also provides a communication device, the communication device is a first communication device, and the communication device includes:

A determining module, configured to determine that the second communication device occupies a channel when the first signal sent by the second communication device is detected;

Wherein, the first signal is a signal that supports independent detection.

In a fourth aspect, an embodiment of the present invention also provides a communication device, the communication device is a second communication device, and the second communication device includes:

A second sending module, configured to send a first signal to N first communication devices when the second communication device detects that the channel is idle;

Wherein, the first signal is a signal that supports independent detection.

In a fifth aspect, an embodiment of the present invention also provides a communication device. The communication device includes a processor, a memory, and a computer program that is stored on the memory and can run on the processor. The computer program is The processor implements the steps of the method for determining channel occupancy of the unlicensed frequency band as described above, or the steps of the method for sending the unlicensed frequency band as described above when executed.

In a sixth aspect, an embodiment of the present invention also provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium. When the computer program is executed by a processor, the above-mentioned unlicensed frequency band channel occupation is realized The steps of the determining method, or the steps of the transmission method of the unlicensed frequency band as described above.

In the embodiment of the present invention, the first signal is a signal that supports independent detection, that is, when detecting the first signal, other information may not be detected, so that the detection time of the first signal can be shortened, and the detection of the first communication device can be improved. The rate of the first signal. In addition, in the embodiment of the present invention, for an unlicensed frequency band, when the first communication device detects the first signal sent by the second communication device, it can determine that the second communication device occupies the channel, so that the channel can be increased. Utilization rate.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is one of the schematic diagrams of network operation provided by an embodiment of the present invention;

2 is a flowchart of a method for determining channel occupation of an unlicensed frequency band according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for sending an unlicensed frequency band according to an embodiment of the present invention;

Figure 4 is a second schematic diagram of network operation provided by an embodiment of the present invention;

Figure 5 is one of the structural diagrams of a communication device provided by an embodiment of the present invention;

Fig. 6 is a second structural diagram of a communication device provided by an embodiment of the present invention;

Fig. 7 is the third structural diagram of a communication device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment. In addition, the use of "and/or" in this application means at least one of the connected objects, such as A and/or B and/or C, which means that it includes A alone, B alone, C alone, and both A and B exist, Both B and C exist, A and C exist, and A, B, and C all exist in 7 cases.

To facilitate understanding, some content involved in the embodiments of the present invention will be described below:

1. Unlicensed frequency band.

In the future communication system, the unlicensed band (Unlicensed Band) can be used as a supplement to the licensed band (Licensed Band) to help operators expand their services.

In order to be consistent with the deployment of New Radio (NR) and maximize unlicensed access based on New Radio (NR), unlicensed frequency bands can work in 5 GHz, 37 GHz and 60 GHz Frequency band. The large bandwidth (80 or 100MHz) of the unlicensed frequency band can reduce the implementation complexity of the base station and UE. Since the unlicensed frequency band is shared by a variety of radio access technologies (Radio Access Technology, RAT), such as wireless fidelity (Wireless-Fidelity, WiFi), radar, and long-term evolution (Long Term Evolution, LTE) authorized auxiliary access (Licensed- Assisted Access, LAA), etc. Therefore, the unlicensed frequency band must comply with the regulations (Regulation) to ensure that all devices can use the resource fairly, such as Listen Before Talk (LBT), and the maximum channel occupation time ( Maximum Channel Occupancy Time, MCOT) and other rules. When a transmission node needs to send information, it needs to do LBT first, and perform Energy Detection (ED) on the surrounding nodes. When the detected power is lower than a threshold, the channel is considered to be empty (Idle), and the transmission node can perform Send; otherwise, the channel is considered to be busy and the transmission node cannot send. The transmission node can be a base station, a user equipment (User Equipment, UE), a WiFi access point (Access Point, AP), and so on. After the transmission node starts transmission, the channel occupation time COT cannot exceed MCOT.

2. Network operation of frame-based equipment (FBE).

For FBE, the transmission/reception adopts a periodic structure, and the period is a fixed frame period (Fixed Frame Period, FFP).

The FBE node uses the LBT-based channel access mechanism to occupy the channel. Among them, a node that initiates a transmission sequence that includes one or more consecutive transmissions is called an initiating node (Initiating Device), and other nodes are called a responding device (Responding Device). The FBE node can be an initiating node, a responding node, or supporting two node functions at the same time.

An example of the operation of the initiating node can be seen in Figure 1, and its operation requirements can include at least one of the following:

The value set of FFP supported by the node is declared by the device manufacturer, and each value requirement is within the range of 1-10 milliseconds (ms). The transmission can only be started at the beginning of a certain FFP. The node can change the FFP currently applied, but its frequency cannot be higher than 200ms once.

Before starting transmission at the start of a certain FFP, the initiating node will perform channel idle estimation (Clear Channel Assess, CCA). If it is judged to be idle, it can be sent immediately; otherwise, it is not allowed to be sent within the following FFP duration (except for the short control signaling transmissions (Short Control Signaling Transmissions) specified by regulatory requirements). In other words, the initiating node needs to do one-shot LBT before transmission, that is, Cat. 2 LBT.

Within a certain FFP that has started to be sent, it is possible to define the total length COT during which the initiating node can transmit without re-evaluating the availability of the channel. The initiating node can transmit multiple times on the designated channel within the COT without performing additional CCA, as long as the time interval between adjacent transmissions of these transmissions does not exceed 16 μs. If the time interval between adjacent transmissions in the COT exceeds 16 μs, the initiating node needs to perform additional CCA before continuing to transmit, and continue to transmit only when the CCA determines that the channel is idle. All time intervals between adjacent transmissions are included in the COT duration.

The initiating node can authorize the use of the designated channel in certain periods of time in the COT to one or more associated responding nodes for transmission.

COT cannot be longer than 95% of FFP, and there is an idle period (Idle Period, IP) immediately after COT, and the idle period lasts until the beginning of the next Fixed Frame Period, so that the length of the idle period is at least 5% of FFP , And the minimum value is 100 microseconds (μs).

After a certain responding node correctly receives the data packet for it, it can immediately transmit the management and control frame corresponding to the data packet on the designated channel without CCA, such as: Acknowledgement (ACK) frame.

This node needs to ensure that these continuously transmitted frames cannot exceed the maximum COT duration mentioned above.

The responding node can perform the following operations after receiving an initiating node's authorization to use the specified channel for a certain period of time:

If the responding node initiates transmission after the end of the last authorized transmission indicated by the initiating node (at an interval of 16μs at most), it does not need to perform CCA before transmission; otherwise, it performs CCA before the authorized transmission period starts. If the channel is judged to be busy, then Give up this authorization, otherwise you can start transmission on the designated channel, up to the remaining part of the COT in the current FFP, and can start multiple transmissions within the remaining part of the time, as long as the time interval between adjacent transmissions does not exceed 16μs. Give up this authorization after the transfer is complete.

The method of the embodiment of the present invention may be applicable to unlicensed frequency bands.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for determining channel occupancy of an unlicensed frequency band according to an embodiment of the present invention. The method for determining the unlicensed frequency band channel occupancy shown in FIG. 2 can be applied to the first communication terminal.

As shown in Figure 2, the method for determining the occupancy of an unlicensed frequency band channel may include the following steps:

Step 201: When the first signal sent by the second communication device is detected, determine that the second communication device occupies a channel; wherein, the first signal is a signal that supports independent detection.

In this embodiment, when the communication device occupies an unlicensed frequency band channel, it can send the first signal to other communication devices; otherwise, it will not send the first signal to other communication devices. In other words, the communication device will only send the first signal to other devices when it occupies the channel.

Therefore, when the first communication device detects the first signal sent by the second communication device, it is explained that the second communication device occupies the channel, so that the first communication device can determine that the second communication device occupies the channel.

In practical applications, the first communication device may detect the first signal on the time domain resources and frequency domain resources configured by the second communication device.

In this embodiment, the first signal is a signal that supports independent detection. In other words, the detection of the first signal may not be dependent on the detection of other information, and other information may not be detected when the first signal is detected. In this way, even if the first signal received by the first communication device is jointly sent with other information, the first communication device can directly detect the first signal after detecting the joint information, and does not detect the joint information except for the first signal. Information other than the signal, thereby improving the detection efficiency of the first signal.

In this embodiment, the second communication device is a communication device that occupies a channel, and the first communication device is a communication device that can establish a communication connection with the second communication device.

Optionally, the first communication device is a terminal. In this optional implementation manner, the second communication device may be a network side device or a terminal.

Optionally, the second communication device is a network side device. In this optional implementation manner, the first communication device may be a terminal or a network side device.

In the embodiment where the first communication device is a terminal and the second communication device is a network-side device, the first signal is a DownLink (DL) signal; the first communication device is a network-side device, and the second communication device is a In the implementation of the terminal, the first signal is an (UpLink, UL) signal.

In practical applications, the terminal can be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer), a personal digital assistant (PDA), a mobile Internet device (Mobile Internet Device, MID), Wearable device (Wearable Device) or vehicle-mounted device, etc. The network side device can be a base station, a relay, or an access point.

In the method for determining the occupancy of an unlicensed frequency band channel in this embodiment, the first signal is a signal that supports independent detection, that is, other information may not be detected when the first signal is detected, thereby improving the detection of the first communication device by the first communication device. The rate of the signal. In addition, in this embodiment, for an unlicensed frequency band, when the first communication device detects the first signal sent by the second communication device, it can determine that the second communication device occupies a channel, so that the channel can be increased. Utilization rate.

In this embodiment, the first signal detected by the first communication device may satisfy any of the following conditions:

Condition 1: The first signal is not sent with the first object;

Condition 2: The first signal is sent with the first object;

Wherein, the first object includes any one of the following: data, control channel.

In scenario 1 where the first signal detected by the first communication device satisfies the above condition 1, the second communication device may only send the first signal and not send other information. That is, the first signal can be sent independently. In this way, on the one hand, signaling overhead can be reduced; on the other hand, even if there is no transmission of the first object, the second device can also send the first signal, thereby increasing the frequency of sending the first signal and increasing The probability of detecting the first signal by the first communication device can further increase the utilization rate of the channel.

Since the first signal is a signal that supports independent detection, and the first signal is sent independently, the first communication device can directly detect the first signal, which can improve the detection of the first signal by the first communication device. The rate of the signal, in turn, can improve the utilization of the channel.

In the second scenario where the first signal detected by the first communication device satisfies the second condition, the second communication device jointly sends the first signal and the first object.

Since the first signal is a signal that supports independent detection, even if the first signal and the first object are jointly sent, the first communication device can only detect the first signal and not the first object Therefore, the rate at which the first communication device detects the first signal can be increased, thereby increasing the utilization rate of the channel.

In practical applications, after the second communication device occupies the channel, if the first object sends it, the first object and the first signal can be integrated and sent. At this time, the first object A signal satisfies the foregoing condition two; in the case where the first object is not sent, the first signal may be independently sent, and at this time, the first signal satisfies the foregoing condition 1. It can be seen that after the second communication device occupies the channel, it can send the first signal regardless of whether there is transmission by the first object, so that the frequency of sending the first signal can be increased, and the detection by the first communication device can be increased. The probability of the first signal can further improve the utilization rate of the channel.

In this embodiment, optionally, the first signal is a wideband reference signal (Reference Signal, RS). Further, the broadband RS may be any one of the following: a broadband demodulation reference signal (Demodulation Reference Signal, DMRS), and a broadband tracking reference signal (Tracing Reference Signal, TRS).

In this embodiment, optionally, the first signal is periodically transmitted by the second communication device, and the transmission period of the first signal is less than or equal to the fixed frame period FFP of the second communication device. In this way, the first communication device has multiple opportunities to detect the first signal, and there is at least one opportunity to detect the first signal within one FFP of the second communication device, thereby improving the successful detection of the first signal. In turn, the channel utilization rate can be improved.

In this optional implementation manner, the first communication device and the second communication device may be the aforementioned FBE. Specifically, the first communication device may be the aforementioned initiating node, and the second communication device may be the aforementioned responding node.

Optionally, the time domain position of the periodic transmission of the first signal may include at least a starting position of an FFP of the second communication device. That is, the second communication device may send the first signal at least once at the start position of an FFP.

However, it should be understood that this embodiment does not therefore limit the time domain position of the first signal period transmission. In some implementations, the time domain position of the first signal period transmission may not include the second communication. The starting position of the FFP of the device.

In this embodiment, optionally, after the determining that the second communication device occupies a channel, the method further includes at least one of the following:

Sending the first information to the second communication device within the channel occupation time COT;

In the COT, receiving the second information sent by the second communication device.

It can be seen that after determining that the second communication device occupies a channel, the first communication device can share the channel occupancy time (COT) and transmit information on the channel, thereby improving the utilization rate of the channel.

After determining that the second communication device occupies a channel, the first communication device can receive the information sent by the second communication device on the channel, so that the success rate of receiving the information sent by the second communication device can be improved.

In this embodiment, optionally, the method further includes:

If the first signal sent by the second communication device is not detected, sending the first information to the second communication device is prohibited in the COT.

In the case that the first signal sent by the second communication device is not detected, it indicates that the second communication device does not currently occupy a channel. Therefore, the sending of information to the second communication device can be prohibited in the COT. In addition, optionally, the first communication device may continue to detect the first signal or other information.

In this embodiment, optionally, the method further includes:

In the case that the first signal is sent at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, then the FFP of the second communication device Do not receive information within.

It can be seen from the foregoing that the second communication device will perform CCA before starting transmission at the starting position of a certain FFP, and if it is determined to be idle, it can send in this FFP; otherwise, sending is not allowed in this FFP.

In this optional implementation manner, the second communication device is configured to send the first signal at the start position of the FFP. In this way, if the result of the CCA performed by the second communication device before the FFP is idle, the first signal will be sent at the start position of the FFP; otherwise, the first signal will not be sent at the start position of the FFP.

It can be seen that in this optional implementation manner, if the first communication device does not detect the first signal, it means that the result of the CCA performed by the second communication device before FFP is not idle, and the second communication device will not Send information in FFP. Therefore, the first communication device can give up receiving the information sent by the second communication device at the FFP of the second communication device, so as to reduce the operational burden of the first communication device.

Referring to FIG. 3, FIG. 3 is a flowchart of a method for determining channel occupancy of an unlicensed frequency band according to an embodiment of the present invention. The sending method of the unlicensed frequency band in the embodiment of the present invention may be applied to the second communication device.

As shown in Figure 3, the sending method of the unlicensed frequency band may include the following steps:

Step 301: When the second communication device detects that the channel is idle, send a first signal to N first communication devices, where the first signal is a signal that supports independent detection.

In the transmission method of the unlicensed frequency band of this embodiment, the first signal is a signal that supports independent detection, that is, other information may not be detected when the first signal is detected, so that the detection of the first signal by the first communication device can be improved. rate. In addition, in this embodiment, for the unlicensed frequency band, when the second communication device detects that the channel is idle, the second communication device sends the first signal to the N first communication devices, so that the first communication device can detect In the case of the first signal sent by the second communication device, it is determined that the second communication device occupies a channel, so that the utilization rate of the channel can be improved.

Optionally, the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.

Optionally, the sending a first signal to N first communication devices includes:

Periodically sending the first signal to the N first communication devices;

Wherein, the sending period of the first signal is less than or equal to the FFP of the second communication device.

Optionally, the time domain position periodically sent by the first signal includes at least a start position of an FFP of the second communication device.

Optionally, when N is greater than 1, the sending a first signal to N first communication devices includes:

The first signal is sent to the first part of the N first communication devices through the first frequency domain resource, and the second part of the N first communication devices is sent through the second frequency domain resource.述第一信号。 Said the first signal.

In this optional implementation manner, the second communication device may shift (Shift) the frequency domain transmission resource of the first signal, and transmit to the N first communication devices through at least two frequency domain resources that do not completely overlap. The first signal, in this way, the N first communication devices can receive the first signal through at least two incompletely overlapping frequency domain resources, so that the reception interference of the N first communication devices can be reduced , Thereby increasing the success rate of the N first communication devices receiving the first signal.

Optionally, the first signal is a broadband RS.

Optionally, the broadband RS is any one of the following: broadband DMRS and broadband TRS.

Optionally, after the first signal is sent to the N first communication devices, the method further includes at least one of the following:

In the COT, receiving first information, the first information being sent by a first communication device among the N first communication devices;

In the COT, the second information is sent to the N first communication devices.

Optionally, the first communication device is a terminal and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a terminal.

It should be noted that this embodiment is an embodiment of a second communication device corresponding to the above method embodiment. In this embodiment, only the parts that are different from the method embodiment in FIG. 2 are described. For descriptions of the same parts, please refer to The description of the method embodiment in FIG. 2 will not be repeated here.

The various optional implementation manners introduced in the embodiment of the present invention can be implemented in combination with each other or can be implemented separately, and the embodiment of the present invention does not limit this.

To facilitate understanding, take the first communication device as a UE, the second communication device as a base station, and the first signal as a DL signal (DL Signal) as an example for illustration.

The base station can send a DL signal when the channel is occupied.

The DL signal can satisfy at least one of the following:

The DL signal can be Wideband RS;

The DL signal may not be sent along with the data or control channel;

The DL signal can be sent at the beginning of each FFP;

The DL signal can be sent periodically, and the period can be less than or equal to FFP;

If the DL signal is Wideband DMRS, subsequent DCI detection can be performed after the signal is detected.

Example one

The base station sends a Wideband RS, which can be Wideband DMRS, TRS, etc. FBE UE performs corresponding signal detection at the configured position. If the UE detects the corresponding signal, it indicates that the base station occupies the channel, and the UE can perform uplink transmission on the channel. If the UE does not detect the corresponding signal, it indicates that the base station fails to occupy the channel, and the UE can stop other information detection. For example, the RS is a Wideband DMRS of the Physical Downlink Control Channel (PDCCH). If the UE does not detect the DMRS, it does not need to monitor the Control Resource Set (CORESET). Wideband DMRS can be sent separately.

Example two

DL Signal can be sent periodically, and the period can be less than or equal to FFP. The DL Signal can be sent at the start position of each FFP, such as the start positions of FFP1 and FFP2 in FIG. 4.

When the period of DL Signal is less than FFP, DL Signal can also be sent in FFP, as shown in Figure 4, the second DL Signal in FFP2. The advantage of the DL Signal period being shorter than FFP is that for a Discontinuous Reception (DRX) UE, when the UE enters DRX ON after sending the DL Signal at the start position of the FFP, it may have other opportunities to detect the DL Signal. For example, UE2 in FIG. 4 missed the DL Signal at the start position of FFP2, and can detect DL Signal at other positions in FFP2, and then perform uplink transmission.

Example three

The position of the DL Signal in the frequency domain can be shifted by the base station. When the DL Signal is the Wideband DMRS of the PDCCH, the position of the Shift CORESET in the frequency domain is used to make the Wideband DMRS shift in the frequency domain, thereby reducing the reception interference of the UE.

In the above embodiment, the base station sends DL Signal in FFP, and the sending position includes at least the start position of FFP; DL Signal can be Wideband RS, and the sending period can be less than or equal to FFP; if Wideband RS is Wideband DMRS of PDCCH, FBE UE Wideband DMRS must be detected, but CORESET may not be detected; the position of DL Signal in the frequency domain can be shifted.

Through the above-mentioned embodiments, the FBE UE can quickly detect whether the base station occupies a channel, thereby determining whether to share the COT of the base station.

Referring to FIG. 5, FIG. 5 is one of the structural diagrams of a communication device provided by an embodiment of the present invention. The communication device 500 shown in FIG. 5 is the first communication device in the embodiment of the present invention. As shown in FIG. 5, the communication device 500 includes:

The determining module 500 is configured to determine that the second communication device occupies a channel when the first signal sent by the second communication device is detected;

Wherein, the first signal is a signal that supports independent detection.

Optionally, the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.

Optionally, the first signal is periodically sent by the second communication device, and the sending period of the first signal is less than or equal to the fixed frame period FFP of the second communication device.

Optionally, the time domain position periodically sent by the first signal includes at least a start position of an FFP of the second communication device.

Optionally, the first signal is a broadband reference signal RS.

Optionally, the broadband RS is any one of the following: a broadband demodulation reference signal DMRS, and a broadband tracking reference signal TRS.

Optionally, the communication device 500 further includes at least one of the following:

The first sending module is configured to send first information to the second communication device within the channel occupation time COT;

The first receiving module is configured to receive the second information sent by the second communication device in the COT.

Optionally, the communication device 500 further includes:

The prohibition module is configured to prohibit sending the first information to the second communication device in the COT when the first signal sent by the second communication device is not detected.

Optionally, the communication device 500 further includes:

The abandonment module is used to send the first signal at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, then perform the 2. No information is received in the FFP of the communication device.

Optionally, the first communication device is a terminal and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a terminal.

The communication device 500 can implement each process that can be implemented by the first communication device in the method embodiment of the present invention and achieve the same beneficial effects. To avoid repetition, details are not described herein again.

Refer to FIG. 6, which is the second structural diagram of the communication device provided by the embodiment of the present invention. The communication device 600 shown in FIG. 6 is the second communication device according to the embodiment of the present invention. As shown in FIG. 6, the communication device 600 includes:

The second sending module 601 is configured to send a first signal to N first communication devices when the second communication device detects that the channel is idle;

Wherein, the first signal is a signal that supports independent detection.

Optionally, the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.

Optionally, the second sending module 601 is specifically configured to:

Periodically sending the first signal to the N first communication devices;

Wherein, the sending period of the first signal is less than or equal to the FFP of the second communication device.

Optionally, the time domain position periodically sent by the first signal includes at least a start position of an FFP of the second communication device.

Optionally, when N is greater than 1, the second sending module 601 is specifically configured to:

The first signal is sent to the first part of the N first communication devices through the first frequency domain resource, and the second part of the N first communication devices is sent through the second frequency domain resource.述第一信号。 Said the first signal.

Optionally, the first signal is a broadband RS.

Optionally, the broadband RS is any one of the following: broadband DMRS and broadband TRS.

Optionally, the communication device 600 further includes at least one of the following:

The second receiving module is configured to receive first information in the COT, the first information being sent by a first communication device among the N first communication devices;

The third sending module is configured to send second information to the N first communication devices in the COT.

Optionally, the first communication device is a terminal and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a terminal.

The communication device 600 can implement various processes that can be implemented by the second communication device in the method embodiment of the present invention and achieve the same beneficial effects. To avoid repetition, details are not described herein again.

Refer to FIG. 7, which is the third structural diagram of the communication device provided by the embodiment of the present invention. As shown in FIG. 7, the communication device 700 includes: a processor 701, a memory 702, a user interface 703, a transceiver 704, and a bus interface.

Wherein, in the embodiment of the present invention, the communication device 700 further includes: a computer program stored on the memory 702 and running on the processor 701.

The communication device 700 may be the first communication device or the second communication device in the embodiment of the present invention.

The communication device 700 is scenario 1 of the first communication device in the embodiment of the present invention.

When the computer program is executed by the processor 701, the following steps are implemented:

In the case of detecting the first signal sent by the second communication device, determining that the second communication device occupies a channel;

Wherein, the first signal is a signal that supports independent detection.

Optionally, the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.

Optionally, the first signal is periodically sent by the second communication device, and the sending period of the first signal is less than or equal to the fixed frame period FFP of the second communication device.

Optionally, the time domain position periodically sent by the first signal includes at least a start position of an FFP of the second communication device.

Optionally, the first signal is a broadband reference signal RS.

Optionally, the broadband RS is any one of the following: a broadband demodulation reference signal DMRS, and a broadband tracking reference signal TRS.

Optionally, when the computer program is executed by the processor 701, at least one of the following steps is implemented:

Within the channel occupation time COT, send the first information to the second communication device through the transceiver 704;

In the COT, the second information sent by the second communication device is received through the transceiver 704.

Optionally, when the computer program is executed by the processor 701, at least one of the following steps is implemented:

If the first signal sent by the second communication device is not detected, sending the first information to the second communication device is prohibited in the COT.

Optionally, when the computer program is executed by the processor 701, the following steps may be specifically implemented:

In the case that the first signal is sent at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, then the FFP of the second communication device Do not receive information within.

Optionally, the first communication device is a terminal and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a terminal.

For scenario 1, the communication device 700 can implement each process implemented by the first communication device in the foregoing method embodiment. To avoid repetition, details are not described herein again.

The communication device 700 is scenario 2 of the second communication device in the embodiment of the present invention.

When the second communication device detects that the channel is idle, sending the first signal to N first communication devices;

Wherein, the first signal is a signal that supports independent detection.

Optionally, the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.

Optionally, when the computer program is executed by the processor 701, the following steps may be specifically implemented:

Periodically sending the first signal to the N first communication devices;

Wherein, the sending period of the first signal is less than or equal to the FFP of the second communication device.

Optionally, the time domain position periodically sent by the first signal includes at least a start position of an FFP of the second communication device.

Optionally, when N is greater than 1, the computer program may specifically implement the following steps when being executed by the processor 701:

The first signal is sent to the first part of the N first communication devices through the first frequency domain resource, and the second part of the N first communication devices is sent through the second frequency domain resource.述第一信号。 Said the first signal.

Optionally, the first signal is a broadband RS.

Optionally, the broadband RS is any one of the following: broadband DMRS and broadband TRS.

Optionally, when the computer program is executed by the processor 701, at least one of the following steps may be specifically implemented:

In the COT, receiving first information through the transceiver 704, the first information being sent by the first communication device among the N first communication devices;

In the COT, the second information is sent to the N first communication devices through the transceiver 704.

Optionally, the first communication device is a terminal and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a terminal.

For the second scenario, the communication device 700 can implement each process implemented by the second communication device in the foregoing method embodiment. To avoid repetition, details are not described herein again.

In FIG. 7, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 701 and various circuits of the memory represented by the memory 702 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits. These are all known in the art, and therefore, no further descriptions are given here. The bus interface provides the interface. The transceiver 704 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 703 may also be an interface that can externally and internally connect the required equipment, and the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 can store data used by the processor 2601 when performing operations.

The embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, an embodiment of the method for determining the above-mentioned unlicensed frequency band channel occupation or the above-mentioned unlicensed frequency band is realized Each process of the embodiment of the sending method can achieve the same technical effect. In order to avoid repetition, it will not be repeated here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements that are not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present disclosure.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.

A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be realized by controlling the relevant hardware through a computer program. The program can be stored in a computer readable storage medium. When executed, it may include the procedures of the above-mentioned method embodiments. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM), etc.

It can be understood that the embodiments described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, modules, units, and sub-units can be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (Digital Signal Processor, DSP), and digital signal processing equipment (DSP Device, DSPD). ), programmable logic devices (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, used to execute the present disclosure Other electronic units or a combination of the functions described above.

For software implementation, the technology described in the embodiments of the present disclosure can be implemented by modules (for example, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure. The software codes can be stored in the memory and executed by the processor. The memory can be implemented in the processor or external to the processor.

The embodiments of the present invention are described above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present invention, many forms can be made without departing from the purpose of the present invention and the scope of protection of the claims, and they all fall within the protection of the present invention.

Claims (40)

1. A method for determining channel occupancy of an unlicensed frequency band, applied to a first communication device, includes:

   In the case of detecting the first signal sent by the second communication device, determining that the second communication device occupies a channel;

   Wherein, the first signal is a signal that supports independent detection.
2. The method according to claim 1, wherein the first signal is not sent with a first object, and the first object includes any one of the following: data, control channel.
3. The method according to claim 1, wherein the first signal is periodically transmitted by the second communication device, and the transmission period of the first signal is less than or equal to the fixed frame period FFP of the second communication device.
4. 3. The method according to claim 3, wherein the time domain position of the first signal period transmission includes at least a starting position of an FFP of the second communication device.
5. The method according to any one of claims 1 to 4, wherein the first signal is a broadband reference signal RS.
6. The method according to claim 5, wherein the wideband RS is any one of the following: a wideband demodulation reference signal DMRS, and a wideband tracking reference signal TRS.
7. The method according to claim 1, wherein after the determining that the second communication device occupies a channel, the method further comprises at least one of the following:

   Sending the first information to the second communication device within the channel occupation time COT;

   In the COT, receiving the second information sent by the second communication device.
8. The method according to claim 1, further comprising:

   If the first signal sent by the second communication device is not detected, sending the first information to the second communication device is prohibited in the COT.
9. The method according to claim 1, further comprising:

   In the case that the first signal is sent at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, then the FFP of the second communication device Do not receive information within.
10. The method according to claim 1, wherein the first communication device is a terminal, and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device For the terminal.
11. An unlicensed frequency band transmission method, applied to a second communication device, includes:

    When the second communication device detects that the channel is idle, sending the first signal to N first communication devices;

    Wherein, the first signal is a signal that supports independent detection.
12. The method according to claim 11, wherein the first signal is not sent with the first object, and the first object includes any one of the following: data, control channel.
13. The method according to claim 11, wherein the sending the first signal to the N first communication devices comprises:

    Periodically sending the first signal to the N first communication devices;

    Wherein, the sending period of the first signal is less than or equal to the FFP of the second communication device.
14. The method according to claim 13, wherein the time domain position of the first signal period transmission includes at least a starting position of an FFP of the second communication device.
15. The method according to claim 11, wherein, when N is greater than 1, the sending the first signal to N first communication devices comprises:

    The first signal is sent to the first part of the N first communication devices through the first frequency domain resource, and the second part of the N first communication devices is sent through the second frequency domain resource.述第一信号。 Said the first signal.
16. The method according to any one of claims 11 to 15, wherein the first signal is a wideband RS.
17. The method according to claim 16, wherein the broadband RS is any one of the following: broadband DMRS, broadband TRS.
18. The method according to claim 11, wherein after the sending the first signal to the N first communication devices, the method further comprises at least one of the following:

    In the COT, receiving first information, the first information being sent by a first communication device among the N first communication devices;

    In the COT, the second information is sent to the N first communication devices.
19. The method according to claim 11, wherein the first communication device is a terminal, and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device For the terminal.
20. A communication device, which is a first communication device, includes:

    A determining module, configured to determine that the second communication device occupies a channel when the first signal sent by the second communication device is detected;

    Wherein, the first signal is a signal that supports independent detection.
21. The communication device according to claim 20, wherein the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.
22. The communication device according to claim 20, wherein the first signal is periodically transmitted by the second communication device, and the transmission period of the first signal is less than or equal to the fixed frame period FFP of the second communication device.
23. The communication device according to claim 22, wherein the time domain position of the first signal period transmission includes at least a starting position of an FFP of the second communication device.
24. The communication device according to any one of claims 20 to 23, wherein the first signal is a broadband reference signal RS.
25. The communication device according to claim 24, wherein the wideband RS is any one of the following: a wideband demodulation reference signal DMRS, and a wideband tracking reference signal TRS.
26. The communication device according to claim 20, further comprising at least one of the following:

    The first sending module is configured to send first information to the second communication device within the channel occupation time COT;

    The first receiving module is configured to receive the second information sent by the second communication device in the COT.
27. The communication device according to claim 20, further comprising:

    The prohibition module is configured to prohibit sending the first information to the second communication device in the COT when the first signal sent by the second communication device is not detected.
28. The communication device according to claim 20, further comprising:

    The abandonment module is used to send the first signal at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, then perform the 2. No information is received in the FFP of the communication device.
29. The communication device according to claim 20, wherein the first communication device is a terminal, and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a network-side device. The equipment is a terminal.
30. A communication device, which is a second communication device, includes:

    A second sending module, configured to send a first signal to N first communication devices when the second communication device detects that the channel is idle;

    Wherein, the first signal is a signal that supports independent detection.
31. The communication device according to claim 30, wherein the first signal is not sent with the first object, and the first object includes any one of the following: data and control channel.
32. The communication device according to claim 30, wherein the second sending module is specifically configured to:

    Periodically sending the first signal to the N first communication devices;

    Wherein, the sending period of the first signal is less than or equal to the FFP of the second communication device.
33. The communication device according to claim 32, wherein the time domain position of the first signal period transmission includes at least a start position of an FFP of the second communication device.
34. The communication device according to claim 30, wherein, when N is greater than 1, the second sending module is specifically configured to:

    The first signal is sent to the first part of the N first communication devices through the first frequency domain resource, and the second part of the N first communication devices is sent through the second frequency domain resource.述第一信号。 Said the first signal.
35. The communication device according to any one of claims 30 to 34, wherein the first signal is a broadband RS.
36. The communication device according to claim 35, wherein the broadband RS is any one of the following: broadband DMRS and broadband TRS.
37. The communication device according to claim 30, further comprising at least one of the following:

    The second receiving module is configured to receive first information in the COT, the first information being sent by a first communication device among the N first communication devices;

    The third sending module is configured to send second information to the N first communication devices in the COT.
38. The communication device according to claim 30, wherein the first communication device is a terminal, and the second communication device is a network-side device; or, the first communication device is a network-side device, and the second communication device is a network-side device. The equipment is a terminal.
39. A communication device comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor. The computer program is executed by the processor to implement any of claims 1 to 10 One of the steps of the method for determining the occupancy of the unlicensed frequency band channel, or the steps of the method for transmitting the unlicensed frequency band according to any one of claims 11 to 19.
40. A computer-readable storage medium having a computer program stored on the computer-readable storage medium, when the computer program is executed by a processor, the unlicensed frequency band channel occupied The step of determining the method, or the step of the sending method of the unlicensed frequency band according to any one of claims 11 to 19.

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