Channel occupancy time sharing method, device, system and storage medium

Abstract

The embodiment of the present application provides a channel occupation time sharing method, device, system and storage medium, the method comprising obtaining the channel occupation time COT of a first channel on an unlicensed frequency band; sending the COT information to a network device, the COT information is used to characterize the time during which the network device is allowed to share the first channel. In the embodiment of the present application, by sharing the channel occupation time of a terminal device with a network device, the channel occupancy rate is increased and the system performance is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a channel occupancy time sharing method, device, system and storage medium. Background Art

[0002] With the development of communication technology, the authorized frequency band can no longer meet the communication needs of terminals and base stations. For example, in the 5G communication system, it is necessary to expand the communication between base stations and terminals to unlicensed frequency bands. However, before using the unlicensed frequency band, it is necessary to detect the unlicensed frequency band to determine the status of the unlicensed frequency band. Only when the unlicensed frequency band is idle can the unlicensed frequency band be occupied for communication.

[0003] Communication systems deployed on unlicensed frequency bands usually use or share wireless resources in a competitive manner. In order to ensure fairness, devices transmitting on unlicensed frequency bands usually need to comply with the listen before talk (LBT) rule, that is, they need to listen to the channel before sending a signal and start transmitting when the channel is idle. Among them, the device does not occupy the channel permanently, but determines an occupation time, which can be called the channel occupancy time (COT). The device occupies the idle unlicensed frequency band during the occupation time.

[0004] However, the terminal and the base station apply for channels for uplink transmission or downlink transmission based on the LBT mechanism, which will lead to waste of channel resources applied by the terminal or the base station. For example, after the terminal obtains the COT of a channel, the terminal's uplink transmission may not use up the COT of the channel, resulting in waste of channel resources. Summary of the invention

[0005] In view of this, the present application provides a channel occupancy time sharing method, device, system and storage medium, so as to solve the problem in the prior art that the terminal and the base station apply for channels for uplink transmission or downlink transmission based on the LBT mechanism respectively, resulting in waste of channel resources applied by the terminal.

[0006] In a first aspect, an embodiment of the present application provides a channel occupancy time sharing method, which is applied to a terminal device, and the method includes: obtaining the channel occupancy time COT of a first channel in an unlicensed frequency band; sending the COT information to a network device, and the COT information is used to characterize the time that the network device is allowed to share the first channel.

[0007] In an optional embodiment, the COT information includes a channel occupation time starting point and a channel occupation time length.

[0008] In an optional embodiment, sending the COT information to the network device includes: carrying the COT information in an overhead symbol of the terminal device, and sending the COT information to the network device.

[0009] In an optional embodiment, the COT information is carried in the overhead symbol of the terminal device, including: carrying the COT information in K / T+1 overhead symbols of the terminal device except for the confirmation character ACK feedback information, wherein K is the number of bits of the COT information, each bit is transmitted based on the 1 / T comb carrier group of the system overhead symbol, 1 overhead symbol among the K / T+1 overhead symbols is used to carry the demodulation reference signal DMRS of the COT information, and K / T overhead symbols among the K / T+1 overhead symbols are used to carry K bits of the COT information.

[0010] In an optional embodiment, carrying the COT information in an overhead symbol of the terminal device includes: carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device.

[0011] In an optional embodiment, carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device includes: carrying the COT information in a DMRS symbol within the semi-persistently scheduled data information transmission resource.

[0012] In an optional embodiment, carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device includes: carrying the COT information in an overhead symbol after a DMRS symbol in the semi-persistently scheduled data information transmission resource.

[0013] In the second aspect, an embodiment of the present application provides a channel occupancy time sharing method, which is applied to a network device, and the method includes: receiving COT information sent by a terminal device, and the COT information is used to characterize the time when the network device is allowed to share the first channel; within the COT corresponding to the COT information, performing downlink transmission to the terminal device through the first channel.

[0014] In an optional embodiment, the COT information includes a channel occupation time starting point and a channel occupation time length.

[0015] In an optional embodiment, in the COT corresponding to the COT information, downlink transmission is performed to the terminal device via the first channel, including: in the COT corresponding to the COT information, if the first channel is monitored to be in an idle state, downlink transmission is performed to the terminal device via the first channel; or, in the COT corresponding to the COT information, downlink transmission is directly performed to the terminal device via the first channel.

[0016] In a third aspect, an embodiment of the present application provides a terminal device, comprising: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the terminal device, enable the terminal device to execute any one of the methods described in the first aspect above.

[0017] In a fourth aspect, an embodiment of the present application provides a network device, comprising: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the network device, enable the network device to execute any one of the methods described by the second party above.

[0018] In a fifth aspect, an embodiment of the present application provides a communication system, comprising the terminal device described in the third aspect and the network device described in the fourth aspect, wherein the terminal device and the network device are communicatively connected.

[0019] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the methods described in the first aspect above.

[0020] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any method described in the second aspect above.

[0021] In an embodiment of the present application, the channel occupancy time of the terminal device is shared with the network device to increase the channel occupancy rate and improve the system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a channel occupancy time sharing method provided in an embodiment of the present application;

[0025] Figure 3 A schematic flow chart of another channel occupancy time sharing method provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0031] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] Before specifically introducing the embodiments of the present application, a brief introduction to the scenarios involved in the present application is first given.

[0033] See also Figure 1 , is a schematic diagram of a scenario of a communication system provided in an embodiment of the present application. The communication system 100 may be a wireless communication system, and the wireless communication system may operate in a licensed frequency band or an unlicensed frequency band. It is understandable that the use of unlicensed frequency bands may increase the system capacity of the wireless communication system, improve channel access efficiency, improve spectrum resource utilization, and ultimately improve system performance.

[0034] like Figure 1 As shown, the communication system 100 may include at least one network device 101 and at least one terminal device 102, and the network device 101 and the terminal device 102, the terminal device 102 and the terminal device 102, and the network device 101 and the network device 101 are connected through wired or wireless communication technology. It should be noted that Figure 1 The number and form of the terminal devices 102 and network devices 101 shown do not constitute a limitation on the embodiments of the present application. In different embodiments, the network device 101 may also be connected to a core network device. Figure 1 Shown in.

[0035] It should be noted that the wireless communication systems mentioned in the embodiments of the present application include but are not limited to: Narrow Band-internet of Things (NB-IoT), Global System for Mobile Communications (GSM), Enhanced Data Rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access 2000 (CDMA2000), Time Division-Synchronization Code Division Multiple Access (TDSCDMA), Long Term Evolution (LTE), fifth-generation mobile communication systems, vehicle-mounted wireless short-range communication systems, and future mobile communication systems.

[0036] In the embodiment of the present application, the above-mentioned network device 101 is a device deployed in a wireless access network to provide wireless communication functions for the terminal device 102. The network device 101 may include but is not limited to a base station (Base Station, BS), a station (Station, STA, including an access point (Access Point, AP) and a non-AP station STA), a network controller, a transmission and reception point (Transmission and Reception Point, TRP), a mobile switching center or a wireless access point in wifi, etc. Exemplarily, the device that directly communicates with the terminal device 102 through a wireless channel is usually a base station. The base station may include various forms of macro base stations, micro base stations, relay stations, access points or remote radio units (Remote Radio Unit, RRU), etc. Of course, other network devices 101 with wireless communication functions may also be used to communicate wirelessly with the terminal device 102, and this application does not make a sole limitation on this.

[0037] The terminal device 102 may include, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., which is a device that provides voice and / or data communication to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, a wearable device, a computing device, or other processing devices linked to a wireless modem. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control (Industrial Control), wireless terminals in self-driving (Self Driving), wireless terminals in remote medical surgery (Remote Medical Surgery), wireless terminals in smart grids (Smart Grid), wireless terminals in transportation safety (Transportation Safety), wireless terminals in smart cities (Smart City), wireless terminals in smart homes (Smart Home), etc.

[0038] It should be noted that the name of the device may be different in different systems. For example, in the LTE network, the base station is called the evolved Node B (eNB or eNodeB), in the 3rd Generation (3G) network, it is called Node B, etc. In the 5G network, it is called a 5G base station (NR Node B, gNB).

[0039] In the vehicle-mounted wireless short-range communication system, the network device 101 is called a grant node (GNode), which can also be called a G node. The G node is a node for sending data scheduling information in the vehicle-mounted wireless short-range communication system; the terminal device 102 is called a terminal node (T Node), which can also be called a T node. The T node is a node for receiving data scheduling information in the vehicle-mounted wireless short-range communication system and sending data according to the data scheduling information. In addition, the communication link from the management node to the terminal node (Communication link for transmission from Grant Node to Terminal Node) is called a G link. The G link can carry data channels, control channels, broadcast channels, synchronization signals, etc. from the management node to the terminal node; the communication link from the terminal node to the management node (Communication link for transmission from Terminal Node to Grant Node) is called a T link. The T link can carry data channels, access channels, etc. from the terminal node to the management node.

[0040] In the embodiments of the present application, the term "sender" refers to the party that initiates transmission, or the party that sends a signal. In different embodiments, the sender may be a network device or a terminal device. That is, the above signal may be a downlink signal or an uplink signal. The signal includes data and / or signaling.

[0041] In an unlicensed frequency band, a sender that needs to send data or signaling usually needs to use or share wireless resources in a competitive manner, and this process can be called a channel access procedure. In some embodiments, the competitive method can adopt an LBT mechanism. Specifically, a network device or a terminal device listens to or senses a channel in an unlicensed frequency band before sending a signal or data to determine whether the channel is idle or busy. If the channel is idle, the network device or the terminal device transmits; if the channel is busy, the network device or the terminal device does not transmit. In some examples, the sender can determine whether the corresponding channel is idle or busy based on the size of the received power of a channel in an unlicensed frequency band. This mechanism can be called a clear channel assessment (CCA). If the received power is less than a predetermined threshold value, the channel is in an idle state, otherwise the channel is in a busy state.

[0042] In different embodiments, the above LBT mechanism may include at least two types, the first type is an LBT mechanism based on random backoff, and the second type is an LBT mechanism without random backoff. The following describes the two types of LBT mechanisms in more detail.

[0043] The first type of LBT (Type 1 LBT) is explained first. The sender listens to the state of a channel within a time period. When it is detected that the channel is idle within a time period, a random backoff number is selected before access to start backoff. Exemplarily, the backoff process uses the backoff slot T_sl as the granularity (for example, T_sl=9us, and the size of the backoff slot is not limited in this application). After the sender selects a random backoff number N, if N=0, the random backoff process is terminated to access the channel. If N>0, let N=N-1, and listen to the channel within a backoff slot T_sl. If the channel is idle, repeat the process until N=0. Otherwise, if the channel is occupied, the sender needs to listen to the channel as idle in an additional time period, continue the backoff process until N=0, and then access the channel. After the backoff is over, the channel is accessed again and the channel occupancy time is obtained. The occupancy time may also be referred to as the maximum channel occupancy time (MCOT). The sender allows continuous transmission during the channel occupancy time. In different embodiments, the duration of the MCOT may be 2ms, 4ms, 6ms or 10ms, or other time units. It should be noted that in the WIFI system, the sender obtains a transmission opportunity (TXOP), which may include a certain occupancy time. In some embodiments, after the sender successfully obtains the corresponding channel occupancy time, the channel may be authorized to other devices communicating with it, that is, after the sender obtains the MCOT through LBT, the MCOT may be shared with other devices communicating with it.

[0044] Next, the second type of LBT (Type 2LBT) is described. The sender listens to the status of a channel within a fixed time period (for example, 25 microseconds (us)). When the channel is detected to be idle within the fixed time period, the sender can access the channel for transmission; when the channel is detected to be busy within the fixed time period, the sender waits for the next listening opportunity or gives up listening. Since there is no need to back off, Type 2LBT can access the channel more quickly than Type 1LBT.

[0045] It is understandable that before the terminal device performs uplink transmission through the unlicensed frequency band, it needs to obtain the COT of a certain channel based on LBT; before the network device performs downlink transmission through the unlicensed frequency band, it also needs to obtain the COT of a certain channel based on LBT. However, the process of applying for a channel based on LBT is time-consuming, especially when Type 1 LBT is used. In an embodiment of the present application, after the terminal device obtains the COT of a certain channel, the COT of the channel is shared with the network device to increase the channel occupancy rate and improve the system performance. The following is a detailed description with reference to the accompanying drawings.

[0046] See also Figure 2 , is a flow chart of a channel occupancy time sharing method provided in an embodiment of the present application. The method can be applied to Figure 1 The communication system shown in Figure 2 As shown, it mainly includes the following steps.

[0047] Step S201: The terminal device obtains the channel occupancy time COT of the first channel in the unlicensed frequency band.

[0048] It is understandable that before performing uplink transmission, the terminal device can apply for a channel in an unlicensed frequency band based on the LBT mechanism. The terminal device can apply for a channel based on the LBT mechanism with random backoff or the LBT mechanism without random backoff. The embodiments of the present application do not impose any restrictions on this.

[0049] It should be pointed out that the terminal device obtains different maximum channel occupancy times (MCOT) based on different service priorities. For example, MCOT can be 2ms, 3ms, 8ms or 10ms, etc. MCOT represents the maximum occupiable channel time.

[0050] Step S202: The terminal device sends COT information to the network device.

[0051] After the terminal device obtains the COT of the first channel through LBT (the COT can also be understood as MCOT), it shares the COT of the channel with the network device and sends the COT information of the channel to the network device. The COT information is used to characterize the time during which the network device is allowed to share the first channel. It can be understood that the terminal device may not use up the COT for uplink transmission within the COT of the first channel. For example, the MCOT of the first channel obtained by the terminal device through LBT is 3ms, and the uplink transmission of the terminal device uses 2ms, then there is 1ms left in the MCOT that can be used for the downlink transmission of the network device. Therefore, sharing channels between terminal devices and network devices can increase channel occupancy and improve system performance.

[0052] In an optional embodiment, the COT information includes a channel occupation time starting point and a channel occupation time length, and based on the channel occupation time starting point and the channel occupation time length, the network device can determine the time it can occupy the first channel. Specifically, the channel occupation time starting point can be a radio frame starting point, and the channel occupation time length can be a radio frame length.

[0053] In order to send COT information, COT information can be encoded. The number of bits N occupied by COT information depends on the number M of COT information that needs to be configured, where N=ceil(log2(M)), and ceil means rounding up. For example, if 4 COT information need to be configured, the number of bits N occupied by COT information is 2, which can be "00", "01", "10", and "11" respectively. For example, when the COT information is "00", it means that the channel occupied time shared with the network device is L1; when the COT information is "01", it means that the channel occupied time shared with the network device is L2; ​​when the COT information is "10", it means that the channel occupied time shared with the network device is L3; when the COT information is "11", it means that the channel occupied time shared with the network device is L1.

[0054] In an optional embodiment, the COT information can be carried in the overhead symbol of the terminal device, and the COT information is sent to the network device. Specifically, the COT information is carried in K / T+1 overhead symbols of the terminal device except for the confirmation character ACK feedback information, where K is the number of bits of the COT information, each bit is transmitted based on the 1 / T comb carrier group of the system overhead symbol, and 1 overhead symbol in the K / T+1 overhead symbols is used to carry the demodulation reference signal DMRS of the COT information, and K / T overhead symbols in the K / T+1 overhead symbols are used to carry K bits of the COT information. For example, K=4, that is, one COT information occupies 4 bits (bit), expressed as abcd; T=2, that is, each bit is transmitted based on the 1 / 2 comb carrier group of the system overhead symbol. First, based on the DMRS that transmits the COT information in the first overhead symbol except for the ACK feedback information, in the second overhead symbol, the first comb carrier group is used to map information a, and then the second comb carrier group is used to map information b; in the third overhead symbol, the first comb carrier group is used to map information c, and then the second comb carrier group is used to map information d. In other words, the K bits of COT information are transmitted in sequence using consecutive comb carrier groups on consecutive overhead symbols.

[0055] In another possible implementation, carrying the COT information in an overhead symbol of the terminal device includes: carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device. Specifically, the COT information may be carried in a DMRS symbol in the semi-persistently scheduled data information transmission resource; or the COT information may be carried in an overhead symbol after the DMRS symbol and immediately adjacent to the DMRS symbol in the semi-persistently scheduled data information transmission resource. This embodiment of the present application does not specifically limit this.

[0056] Step S203: The network device performs downlink transmission to the terminal device through the first channel within the COT corresponding to the COT information.

[0057] After the uplink transmission of the terminal device is completed, the network device performs downlink transmission to the terminal device through the first channel if there is still some occupancy time of the first channel, thereby avoiding the network device from reapplying for the channel based on the LBT mechanism, saving time, and increasing the channel occupancy rate, thereby improving system performance.

[0058] See also Figure 3 , is a flow chart of another channel occupancy time sharing method provided in an embodiment of the present application. Figure 2 Based on the illustrated embodiment, step S203 specifically includes the following steps.

[0059] Step S301: monitoring the working status of the first channel in the COT corresponding to the COT information.

[0060] In an embodiment of the present application, before performing downlink transmission, the network device can listen to the status of the first channel within a fixed time period (for example, 25 microseconds (us)) within the COT based on the LBT mechanism without random backoff.

[0061] Step S302: If the first channel is monitored to be in an idle state, downlink transmission is performed to the terminal device via the first channel.

[0062] If the first channel is monitored to be in an idle state, it means that the first channel can be occupied, and then downlink transmission is performed to the terminal device through the first channel.

[0063] In an embodiment of the present application, the network device directly performs channel access based on the LBT mechanism without random backoff, thereby saving channel access time and improving channel occupancy.

[0064] Of course, the network device may not monitor the state of the first channel, and directly access the first channel for downlink transmission within the COT.

[0065] Corresponding to the above method embodiments, the present application also provides a terminal device and a network device.

[0066] See also Figure 4 , is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Figure 4 A simplified schematic diagram of a possible design structure of a terminal device involved in the above method embodiment is shown in FIG. The terminal device includes a transceiver 401, a processor 402, a memory 403 and a modem 404, and the transceiver 401, the processor 402, the memory 403 and the modem 404 are connected via a bus.

[0067] The transceiver 401 adjusts (e.g., analog conversion, filtering, amplification, up-conversion, etc.) the output sample and generates an uplink signal, which is transmitted to the network device in the above embodiment via the antenna. In the downlink, the antenna receives the downlink signal from the network device in the above embodiment. The transceiver 401 adjusts (e.g., filters, amplifies, down-converts, and digitizes, etc.) the signal received from the antenna and provides input samples. Exemplarily, in the modem 404, the encoder 4041 receives the service data and signaling message to be sent on the uplink, and processes the service data and signaling message (e.g., formatting, encoding, and interleaving). The modulator 4042 further processes (e.g., symbol mapping and modulation) the encoded service data and signaling message and provides the above output samples. The demodulator 4043 processes (e.g., demodulates) the above input samples and provides symbol estimates. The decoder 4044 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages sent to the terminal device. The encoder 4041, modulator 4042, demodulator 4043, and decoder 4044 may be implemented by the synthesized modem 404. These units perform processing according to the wireless access technology (e.g., access technology of LTE, 5G, and other evolved systems) adopted by the wireless access network. Figure 4 In the illustrated embodiment, the transceiver 401 is integrated with a transmitter and a receiver. In other embodiments, the transmitter and the receiver may also be independent of each other.

[0068] The processor 402 controls and manages the terminal device, and is used to execute the steps of the processing performed by the terminal device in the above method embodiment. For example, it is used to control the terminal device to perform uplink transmission and / or other processes of the technology described in this application. As an example, the processor 402 is used to support the terminal device to perform Figure 2 and Figure 3The processing process of the terminal device is involved. For example, the transceiver 401 is used to control / receive downlink transmission signals through the antenna. In different embodiments, the processor 402 may include one or more processors, such as one or more CPUs, and the processor 402 may be integrated into a chip, or may be the chip itself.

[0069] The memory 403 is used to store relevant instructions and data, as well as the program code and data of the terminal. In different embodiments, the memory 403 includes but is not limited to a random access memory (Random Access Memory, RAM), a read-only memory (Read-Only Memory, ROM), an erasable programmable read-only memory (Erasable Programmable ReadOnly Memory, EPROM), a non-transitory computer readable storage medium (non-transitory computerreadable storage medium) or a portable read-only memory (Compact Disc Read-Only Memory, CDROM). In this embodiment, the memory 403 is independent of the processor 402. In other embodiments, the memory 403 can also be integrated in the processor 402.

[0070] Understandably, Figure 4 Only a simplified design of the terminal device is shown. In different embodiments, the terminal device may include any number of transmitters, receivers, processors, memories, etc., and all terminal devices that can implement the present application are within the protection scope of the present application.

[0071] See also Figure 5 , is a schematic diagram of the structure of a network device provided in an embodiment of the present application. Figure 5 A simplified schematic diagram of a possible design structure of the network device involved in the above method embodiment is shown in FIG. The network device includes a transceiver 501, a processor 502, a memory 503 and a modem 504, and the transceiver 501, the processor 502, the memory 503 and the modem 504 are connected via a bus.

[0072] The transceiver 501 adjusts (e.g., analog conversion, filtering, amplification, up-conversion, etc.) the output sampling and generates a downlink signal, which is transmitted to the terminal device in the above embodiment via an antenna. In the uplink, the antenna receives the uplink signal from the terminal device in the above embodiment. The transceiver 501 adjusts (e.g., filters, amplifies, down-converts, and digitizes, etc.) the signal received from the antenna and provides input sampling. Exemplarily, in the modem 504, the encoder 5041 receives the service data and signaling message to be sent on the downlink, and processes the service data and signaling message (e.g., formatting, encoding, and interleaving). The modulator 5042 further processes (e.g., symbol mapping and modulation) the encoded service data and signaling message and provides the above output sampling. The demodulator 5043 processes (e.g., demodulates) the above input sampling and provides symbol estimation. The decoder 5044 processes (e.g., deinterleaves and decodes) the symbol estimation and provides decoded data and signaling messages sent to the network device. The encoder 5041, modulator 5042, demodulator 5043, and decoder 5044 may be implemented by the synthesized modem 504. These units perform processing according to the radio access technology (e.g., access technology of LTE, 5G, and other evolved systems) adopted by the radio access network. Figure 5 In the illustrated embodiment, the transceiver 501 is integrated with a transmitter and a receiver. In other embodiments, the transmitter and the receiver may be independent of each other.

[0073] The processor 502 controls and manages the network device, and is used to execute the steps of the processing performed by the network device in the above method embodiment. For example, it is used to control the network device to perform uplink transmission and / or other processes of the technology described in this application. As an example, the processor 502 is used to support the network device to perform Figure 2 and Figure 3 The processing process of the network device is involved. For example, the transceiver 501 is used to control / receive uplink transmission signals through the antenna. In different embodiments, the processor 502 may include one or more processors, such as one or more CPUs, and the processor 502 may be integrated into a chip, or may be the chip itself.

[0074] The memory 503 is used to store relevant instructions and data, as well as the program code and data of the terminal. In different embodiments, the memory 503 includes but is not limited to a random access memory (Random Access Memory, RAM), a read-only memory (Read-Only Memory, ROM), an erasable programmable read-only memory (Erasable Programmable ReadOnly Memory, EPROM), a non-transitory computer readable storage medium (non-transitory computerreadable storage medium) or a portable read-only memory (Compact Disc Read-Only Memory, CDROM). In this embodiment, the memory 503 is independent of the processor 502. In other embodiments, the memory 503 can also be integrated in the processor 502.

[0075] Understandably, Figure 5 Only a simplified design of the network device is shown. In different embodiments, the network device may include any number of transmitters, receivers, processors, memories, etc., and all network devices that can implement the present application are within the protection scope of the present application.

[0076] Corresponding to the above-mentioned device embodiment, the embodiment of the present application also provides a communication system, which includes Figure 4 The terminal equipment and Figure 5 The network devices shown.

[0077] In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and when the program is executed, the program may include some or all of the steps in each embodiment provided in the present application. The storage medium may be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0078] In a specific implementation, an embodiment of the present application further provides a computer program product, which includes executable instructions. When the executable instructions are executed on a computer, the computer executes some or all of the steps in the above method embodiment.

[0079] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0080] Those skilled in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0081] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0082] In several embodiments provided by the present invention, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0083] The above is only a specific embodiment of the present invention. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A channel occupancy time sharing method, characterized in that: Applied to a terminal device, the method comprises: Obtaining a channel occupation time COT of a first channel in an unlicensed frequency band; Sending COT information to the network device, where the COT information is used to indicate a time during which the network device is allowed to share the first channel; The sending of COT information to the network device includes: Carrying the COT information in an overhead symbol of the terminal device, and sending the COT information to the network device; The step of carrying the COT information in an overhead symbol of the terminal device includes: The COT information is carried in K / T+1 overhead symbols of the terminal device except for the confirmation character ACK feedback information, where K is the number of bits of the COT information, each bit is transmitted based on the 1 / T comb carrier group of the system overhead symbol, and one overhead symbol among the K / T+1 overhead symbols is used to carry the demodulation reference signal DMRS of the COT information, and K / T overhead symbols among the K / T+1 overhead symbols are used to carry K bits of the COT information.

2. The method according to claim 1, characterized in that: The COT information includes the channel occupation time starting point and the channel occupation time length.

3. The method according to claim 1, characterized in that Carrying the COT information in an overhead symbol of the terminal device includes: The COT information is carried in an overhead symbol of the semi-persistently scheduled data information transmission resource of the terminal device.

4. The method according to claim 3, characterized in that Carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device includes: The COT information is carried in a DMRS symbol in the semi-persistently scheduled data information transmission resource.

5. The method according to claim 3, characterized in that: Carrying the COT information in an overhead symbol of a semi-persistently scheduled data information transmission resource of the terminal device includes: The COT information is carried in an overhead symbol following the DMRS symbol in the semi-persistent scheduling data information transmission resource.

6. A channel occupation time sharing method, characterized in that: Applied to a network device, the method comprises: Receiving COT information sent by a terminal device, where the COT information is carried in an overhead symbol of the terminal device and is used to indicate a time when the network device is allowed to share a first channel; Performing downlink transmission to the terminal device via the first channel within the COT corresponding to the COT information; The COT information is carried in the overhead symbol of the terminal device, including: The COT information is carried in K / T+1 overhead symbols of the terminal device except for the confirmation character ACK feedback information, where K is the number of bits of the COT information, each bit is transmitted based on the 1 / T comb carrier group of the system overhead symbol, and one overhead symbol among the K / T+1 overhead symbols is used to carry the demodulation reference signal DMRS of the COT information, and K / T overhead symbols among the K / T+1 overhead symbols are used to carry K bits of the COT information.

7. The method according to claim 6, characterized in that The COT information includes the channel occupation time starting point and the channel occupation time length.

8. The method according to claim 6, characterized in that In the COT corresponding to the COT information, downlink transmission is performed to the terminal device through the first channel, including: In the COT corresponding to the COT information, if the first channel is detected to be in an idle state, downlink transmission is performed to the terminal device through the first channel; or, In the COT corresponding to the COT information, downlink transmission is directly performed to the terminal device through the first channel.

9. A terminal device, characterized in that: include: one or more processors; Memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the terminal device, enable the terminal device to execute the method described in any one of claims 1 to 5.

10. A network device, characterized in that: include: one or more processors; Memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the network device, enable the network device to perform the method described in any one of claims 6 to 8.

11. A communication system, characterized in that: It comprises the terminal device according to claim 9 and the network device according to claim 10, wherein the terminal device and the network device are communicatively connected.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 5.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 6 to 8.

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