WO2020052533A1 - 使用免授权频段的通信方法和通信装置 - Google Patents

使用免授权频段的通信方法和通信装置 Download PDF

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Publication number
WO2020052533A1
WO2020052533A1 PCT/CN2019/105022 CN2019105022W WO2020052533A1 WO 2020052533 A1 WO2020052533 A1 WO 2020052533A1 CN 2019105022 W CN2019105022 W CN 2019105022W WO 2020052533 A1 WO2020052533 A1 WO 2020052533A1
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Prior art keywords
time unit
wireless device
time
unit
instruction information
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PCT/CN2019/105022
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English (en)
French (fr)
Inventor
张旭
薛丽霞
周永行
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华为技术有限公司
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Priority to BR112021004455A priority Critical patent/BR112021004455A8/pt
Priority to EP19860516.4A priority patent/EP3836591A4/en
Publication of WO2020052533A1 publication Critical patent/WO2020052533A1/zh
Priority to US17/197,191 priority patent/US11963221B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers

Definitions

  • the present application relates to the field of communications, and in particular, to a communication method and a communication device using an unlicensed frequency band.
  • a fifth-generation (the 5 th generation, 5G) mobile communication system wireless communication devices in unlicensed bands (unlicensed band) inside. In this manner, multiple different wireless devices need to share and use the same frequency domain resources.
  • 5G fifth-generation
  • wireless device A needs to detect the channel occupancy before the access cycle, that is, Perform clear channel assessment (CCA). If wireless device A detects a wireless signal or detects a strong wireless signal energy on the channel during CCA, wireless device A confirms the The channel is unavailable, or the detected channel is occupied by another wireless device. Wireless device A no longer sends information during the access cycle, or does not send information as the initial device during the access cycle, so as not to affect other channels.
  • CCA clear channel assessment
  • the information sent by the wireless device during the access period causes interference; if wireless device A does not detect a wireless signal on the channel or detects a strong wireless signal energy during CCA, wireless device A can send a signal to avoid Other wireless devices use the access period as the access period of their initial device, and start the bit in the time domain of the access period. Send the information.
  • the time domain location of CCA for different wireless devices is determined independently by each wireless device. Therefore, different wireless devices may perform CCA at the same time unit. For example, wireless device A and wireless device B are in the same time domain symbol. If CCA is not performed within the channel and no wireless signal or strong wireless signal energy is detected on the channel, then both wireless devices consider themselves to be the initial devices of the next access cycle and the same in the next access cycle. Data information is sent at the same time in the starting position of the time domain. As a result, the information sent by wireless device A and wireless device B interfere with each other, which reduces the overall transmission performance of the network.
  • the present application provides a communication method and a communication device using an unlicensed frequency band, which can enhance the reliability of wireless devices using the unlicensed frequency band for communication.
  • a communication method using an unlicensed frequency band including: a first wireless device receives first instruction information in a first time unit, and the first instruction information is used to instruct a second wireless device in a second time unit Or the first indication information is used to instruct the second wireless device not to transmit data in the second time unit, and the second time unit is a preset time unit for the second wireless device to transmit data.
  • some wireless devices are allocated a dedicated time unit, which ensures transmission reliability of the wireless device and avoids the problems described in the background art.
  • the dedicated time units of different wireless devices do not overlap in the time domain, or partially overlap, or completely overlap.
  • the relationship between the time domain resources of the dedicated time units of different wireless devices is related to the interference between different wireless devices. If the interference of channels or signals between different wireless devices is small, the dedicated time units of different wireless devices may partially or completely overlap in the time domain. If the channel or signal interference between different wireless devices is large, the dedicated time units of different wireless devices do not overlap in the time domain.
  • the method further includes: the first wireless device performs channel detection and / or CCA in a third time unit, wherein the first indication information indicates that the second wireless device does not transmit data in the second time unit, and the third The time domain position of the time unit is after the time domain position of the first time unit, and the time domain position of the third time unit is before the time domain position of the second time unit.
  • the first wireless device may choose to perform channel detection and / or CCA before the second time unit to compete for the right to use the second time unit, thereby improving the license-free Resource utilization of the frequency band.
  • the first indication information indicates that the second wireless device does not transmit data in the second time unit
  • the method further includes: the first wireless device receives or detects the second indication information in the fourth time unit, and the second The indication information is used to indicate whether the first wireless device can transmit data in the second time unit, the time domain position of the fourth time unit is before the time domain position of the second time unit, and the time domain position of the fourth time unit is After the time domain position of the first time unit.
  • the first wireless device may also detect the second indication information after determining that the second wireless device does not use the second time unit to determine whether it can use the second time unit.
  • the method further includes: the first wireless device performs channel detection and / or CCA in a fifth time unit, wherein the time domain position of the fifth time unit precedes the time domain position of the second time unit, and The time domain position of the fifth time unit is after the time domain position of the fourth time unit.
  • the first wireless device may perform channel detection and / or CCA in the fifth time unit to determine the channel usage of the second time unit.
  • the second indication information includes an identifier of the first wireless device, and / or, the second indication information includes a group identifier of a wireless device group to which the first wireless device belongs, or
  • the second indication information does not include an identifier of the first wireless device, and / or, the second indication information does not include a group identifier of a wireless device group to which the first wireless device belongs.
  • the first wireless device may determine whether the first wireless device can use the second time unit according to whether the identifier of the first wireless device is carried in the second instruction information, and / or, the first wireless device may carry the first time unit according to the second instruction information.
  • a group identifier of a wireless device group to which a wireless device belongs determines whether the first wireless device can use the second time unit. Therefore, multiple wireless devices that interfere with each other can be prevented from competing for the second time unit at the same time.
  • the present application also provides a communication method using an unlicensed frequency band, including: the second wireless device obtains first instruction information, and the first instruction information is used to instruct the second wireless device to transmit data in a second time unit Or, the first instruction information is used to instruct the second wireless device not to transmit data in the second time unit, and the second time unit is a preset time unit for the second wireless device to transmit data; the second wireless device is in the first Sending the first indication information in a time unit.
  • some wireless devices are allocated a dedicated time unit, which ensures the transmission reliability of the wireless device and avoids the problems described in the background art.
  • the dedicated time units of different wireless devices do not overlap in the time domain, or partially overlap, or completely overlap.
  • the relationship between the time domain resources of the dedicated time units of different wireless devices is related to the interference between different wireless devices. If the interference of channels or signals between different wireless devices is small, the dedicated time units of different wireless devices may partially or completely overlap in the time domain. If the channel or signal interference between different wireless devices is large, the dedicated time units of different wireless devices do not overlap in the time domain.
  • the first indication information indicates that the second wireless device does not transmit data in the second time unit
  • the method further includes: the second wireless device sends the second indication information in the fourth time unit, and the second indication information A wireless device for instructing to transmit data in the second time unit, the time domain location of the fourth time unit precedes the time domain location of the second time unit, and the time domain location of the fourth time unit is in the first time unit After the time domain location.
  • the second wireless device may send second instruction information indicating that the wireless device in the second time unit may be used to prevent multiple wireless devices that interfere with each other from competing successfully at the same time. This can improve the resource utilization of the unlicensed band.
  • the wireless device indicated by the second instruction information may also be a wireless device that has emergency data to be transmitted.
  • the second indication information includes an identifier of the wireless device, and / or the second indication information includes a group identifier of a wireless device group to which the wireless device belongs.
  • the first indication information instructs the second wireless device to transmit data in a second time unit
  • the method further includes: the second wireless device performs channel detection and / or CCA in a sixth time unit, wherein the sixth The time domain position of the time unit is before the time domain position of the second time unit, and the time domain position of the sixth time unit is after the time domain position of the fourth time unit.
  • the second wireless device may perform channel detection and / or CCA before the second time unit to determine the channel usage of the second time unit.
  • the method further includes: the second wireless device determines a second time unit.
  • the determining, by the second wireless device, the second time unit includes: the second wireless device determines the second time unit according to a preset rule; or the second wireless device obtains high-level signaling, and the high-level signaling is used to indicate the second time Unit; the second wireless device determines a second time unit according to higher layer signaling.
  • the present application also provides a communication method using an unlicensed frequency band, including: the first wireless device detects first indication information within a first time unit, and the first indication information is used to instruct the second wireless device Data is transmitted in two time units, or the first indication information is used to instruct the second wireless device not to transmit data in the second time unit, where the second time unit is a preset time unit for the second wireless device to transmit data , The time domain position of the first time unit is before the time domain position of the second time unit.
  • some wireless devices are allocated a dedicated time unit, which ensures transmission reliability of the wireless device and avoids the problems described in the background art.
  • the dedicated time units of different wireless devices do not overlap in the time domain, or partially overlap, or completely overlap.
  • the relationship between the time domain resources of the dedicated time units of different wireless devices is related to the interference between different wireless devices. If the interference of channels or signals between different wireless devices is small, the dedicated time units of different wireless devices may partially or completely overlap in the time domain. If the channel or signal interference between different wireless devices is large, the dedicated time units of different wireless devices do not overlap in the time domain.
  • the method further includes: the first wireless device performs channel detection and / or CCA in a third time unit, wherein the first wireless device detects the first indication information in the first time unit; or,
  • the first wireless device does not perform channel detection and / or CCA in the third time unit, wherein the first wireless device does not detect the first indication information in the first time unit;
  • the first indication information is used to indicate that the second wireless device does not transmit data in the second time unit, the time domain position of the third time unit is after the time domain position of the first time unit, and the time domain of the third time unit The position precedes the time domain position of the second time unit.
  • the first wireless device may choose to perform channel detection and / or CCA before the second time unit to compete for the right to use the second time unit, thereby improving the license-free Resource utilization of the frequency band.
  • the method further includes: the first wireless device performs channel detection and / or CCA in a third time unit, wherein the first wireless device does not detect the first indication information in the first time unit; or,
  • the first wireless device does not perform channel detection and / or CCA in the third time unit, wherein the first wireless device detects the first indication information in the first time unit;
  • the first indication information is used to instruct the second wireless device to transmit data in the second time unit, and the time domain position of the third time unit is after the time domain position of the first time unit, and the time domain of the third time unit The position precedes the time domain position of the second time unit.
  • the first wireless device may choose to perform channel detection and / or CCA before the second time unit to compete for the right to use the second time unit, thereby improving the license-free Resource utilization of the frequency band.
  • the first wireless device determines that the second wireless device does not transmit data in the second time unit, and the method further includes: the first wireless device receives or detects the second instruction information in the fourth time unit, and the second instruction information Used to indicate whether the first wireless device can transmit data in the second time unit, the time domain position of the fourth time unit is before the time domain position of the second time unit, and the time domain position of the fourth time unit is first After the time domain position of the time unit.
  • the first wireless device may also detect the second indication information after determining that the second wireless device does not use the second time unit to determine whether it can use the second time unit.
  • the method further includes: the first wireless device performs channel detection and / or CCA in a fifth time unit, wherein the time domain position of the fifth time unit precedes the time domain position of the second time unit, and The time domain position of the fifth time unit is after the time domain position of the fourth time unit.
  • the first wireless device may perform channel detection and / or CCA in the fifth time unit to determine the channel usage of the second time unit.
  • the second indication information includes an identifier of the first wireless device, and / or, the second indication information includes a group identifier of a wireless device group to which the first wireless device belongs, or
  • the second indication information does not include an identifier of the first wireless device, and / or, the second indication information does not include a group identifier of a wireless device group to which the first wireless device belongs.
  • the first wireless device may determine whether the first wireless device can use the second time unit according to whether the identifier of the first wireless device is carried in the second instruction information, and / or, the first wireless device may carry the first time unit according to the second instruction information.
  • a group identifier of a wireless device group to which a wireless device belongs determines whether the first wireless device can use the second time unit. Therefore, it is possible to avoid simultaneous competition between multiple wireless devices that interfere with each other to obtain the second time unit.
  • the present application provides a device using an unlicensed frequency band.
  • the device may implement functions corresponding to the steps in the method according to the first aspect, and the functions may be implemented by hardware or executed by hardware.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • the apparatus includes a processor configured to support the apparatus to perform a corresponding function in the method according to the first aspect.
  • the device may also include a memory for coupling to the processor, which stores program instructions and data necessary for the device.
  • the device further includes a transceiver, and the transceiver is configured to support communication between the device and other network elements.
  • the present application provides a device using an unlicensed frequency band.
  • the device may implement functions corresponding to each step in the method according to the second aspect, and the functions may be implemented by hardware or executed by hardware.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • the device includes a processor configured to support the device to perform a corresponding function in the method according to the second aspect.
  • the device may also include a memory for coupling to the processor, which stores program instructions and data necessary for the device.
  • the device further includes a transceiver, and the transceiver is configured to support communication between the device and other network elements.
  • the present application provides a device using an unlicensed frequency band.
  • the device may implement functions corresponding to each step in the method according to the third aspect, and the functions may be implemented by hardware or executed by hardware.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • the device includes a processor configured to support the device to perform a corresponding function in the method according to the third aspect.
  • the device may also include a memory for coupling to the processor, which stores program instructions and data necessary for the device.
  • the device further includes a transceiver, and the transceiver is configured to support communication between the device and other network elements.
  • the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code is run by a communication unit, a processing unit or a transceiver, a processor of a wireless device, so that The wireless device performs the method described in the first aspect.
  • the present application provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code is executed by a communication unit, a processing unit, a transceiver, or a processor of a wireless device, The wireless device performs the method described in the second aspect.
  • the present application provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code is executed by a communication unit, a processing unit, a transceiver, or a processor of a wireless device, The wireless device performs the method described in the third aspect.
  • the present application provides a computer storage medium for storing computer software instructions for the wireless device, which includes a program designed to execute the method of the first aspect.
  • the present application provides a computer storage medium for storing computer software instructions used by the wireless device, which includes a program designed to execute the method of the second aspect.
  • the present application provides a computer storage medium for storing computer software instructions for the wireless device, which includes a program designed to execute the method of the third aspect.
  • FIG. 1 is a communication system applicable to the present application
  • FIG. 2 is a schematic diagram of time domain resource division in an FBE access mode provided by the present application.
  • FIG. 3 is a schematic diagram of time domain resource division in another FBE access mode provided by the present application.
  • FIG. 4 is a schematic diagram of a communication method using an unlicensed frequency band provided by the present application.
  • FIG. 5 is a schematic diagram of time domain positions of a first time unit and a second time unit provided in the present application;
  • FIG. 6 is a schematic diagram of a time domain location of a third time unit provided by the present application.
  • FIG. 7 is a schematic diagram of another communication method using an unlicensed frequency band provided by the present application.
  • FIG. 8 is a schematic diagram of another communication method using an unlicensed frequency band provided by the present application.
  • FIG. 9 is a schematic diagram of a second wireless device competing for a right to use a second time unit provided by the present application.
  • FIG. 10 is a schematic diagram of a method for determining a candidate exclusive time unit provided by the present application.
  • FIG. 11 is a schematic diagram of another method for determining a candidate exclusive time unit provided by the present application.
  • FIG. 12 is a schematic diagram of another communication method using an unlicensed frequency band provided by the present application.
  • FIG. 13 is a schematic structural diagram of a first wireless device or a second wireless device provided in this application.
  • FIG. 14 is a schematic structural diagram of another first wireless device or a second wireless device provided in this application.
  • FIG. 15 is a schematic structural diagram of a communication device provided by the present application.
  • FIG. 1 shows a communication system applicable to the present application.
  • the communication system includes a wireless device A and a wireless device B.
  • the wireless device A and the wireless device B communicate through a wireless network (for example, a 5G network).
  • a wireless network for example, a 5G network.
  • the wireless communication module can obtain information bits to be transmitted to the network device through a channel. These information bits are, for example, information bits generated by the processing module of the wireless device A, received from other devices, or stored in the storage module of the terminal device.
  • the wireless device A and the wireless device B may be terminal devices or network devices.
  • a terminal device may be referred to as an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user device.
  • the access terminal may be a cellular phone, a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G communication system.
  • the network device can be a base station (BTS) in a code division multiple access (CDMA) system, or a base station (WCDMA) system in a wideband code division multiple access (WCDMA) system.
  • node (B, NB) or an evolutionary base station (eNB) in a long term evolution (LTE) system, or a base station (gNB) in a 5G communication system.
  • eNB evolutionary base station
  • LTE long term evolution
  • gNB base station
  • the network device may also be a relay station, an access point, an in-vehicle device, a wearable device, and other types of devices.
  • the above communication system applicable to the present application is merely an example, and the communication system applicable to the present application is not limited thereto.
  • the number of network devices and terminal devices included in the communication system may be other numbers.
  • Wireless devices need to meet certain conditions when using an unlicensed band (also known as a "unlicensed band").
  • an unlicensed band also known as a "unlicensed band”
  • FBE frame-based equipment
  • the wireless device starts to send data information at the start position of the frame in the time domain.
  • each frame has a given duration, and the given duration is called a fixed frame period.
  • the idle period In each frame, the part that contains no data transmission is called the idle period.
  • the time other than the idle period is called channel occupation time (COT), and the wireless device sends and / or receives data information only in the COT part of each frame.
  • COT channel occupation time
  • a division of the time domain resources in the FBE access mode is shown in Figure 2. In FIG. 2, the time domain structure of the frame is repeated in the time domain.
  • Each frame length includes a time domain continuous (or time domain discontinuous) COT and a time domain continuous (or time domain discontinuous) idle period.
  • This application uses an example in which one frame includes a time-domain continuous COT and one or more time-domain continuous idle periods.
  • the COT may be earlier than the idle period in the time domain, or the COT may be later than the idle period in the time domain.
  • the order of the COT and the idle period in one frame is not limited.
  • the frame length is variable.
  • the frame length can be changed semi-statically.
  • the frame length can be changed from 10ms to 20ms, and can be changed every 200ms.
  • the COT duration and / or idle period duration in the frame may also be changed.
  • the intra-frame COT duration and / or idle period duration are determined according to the value of the frame length.
  • the frame length is changed from 10ms to 20ms
  • the idle period may be changed from 0.5ms to 1ms
  • the COT may be changed from 9.5ms to 19ms.
  • the wireless device starts sending data information at a start time domain position (also referred to as a "start position") of the frame.
  • start position also referred to as a "start position”
  • the earliest time domain position of the data service that can be transmitted in the time domain is the starting time domain position of the COT, and the starting time domain position of the COT can be related to
  • the idle periods are adjacent in the time domain.
  • One definition of the adjacent time domains is that the ending time domain position of the idle period (also referred to as "end position” or "end position”) is the starting time domain position of the COT.
  • the wireless device detects or senses the occupancy of the channel before the COT start time domain position.
  • the detection of channels by wireless devices and the perception of channels by wireless devices are used interchangeably.
  • the ending time domain position of the time unit used for the channel detection or sensing is the starting time domain position of the COT. If the channel is not detected to be occupied, the wireless device sends data information at the start time of the COT, otherwise the wireless device does not send data information at the start time of the COT.
  • each wireless device in the multiple wireless devices cannot effectively detect To the presence of other wireless devices. Or, when the time domain positions of the detection channels of the multiple wireless devices are different, some wireless devices of the multiple wireless devices may also be unable to perform wireless access.
  • the frame structures of two wireless devices are exactly the same and are completely synchronized in the time domain.
  • the channel detection time units of the two wireless devices are located at the ending time domain position of the idle period in frame 1. Then, any one of the two wireless devices cannot detect the presence of the other wireless device, which causes the two wireless devices to interfere with each other when sending information.
  • the frame structures of two wireless devices are the same, as shown in FIG. 3, but the frame structures of the two wireless devices are offset in the time domain. That is, the channel detection time unit of the wireless device A is located at the end time domain position of the idle period of frame 1, and the channel detection time unit of the wireless device B is also located at the end time domain position of the idle period of frame 1. However, because the frame boundaries of wireless device A and wireless device B are offset in the time domain, wireless device A detects that no other device currently occupies the COT of frame 2, and wireless device A sends a signal that occupies frame 2. The time domain location of the channel detection time unit of the wireless device B is later than the time domain location of the channel detection time unit of the wireless device A.
  • the wireless device B can detect the signal sent by the wireless device A within the channel detection time unit, and thus the wireless device B does not send or receive data in the COT of the frame 2.
  • wireless device A has a large amount of data to transmit, or wireless device A needs to transmit data for a long time
  • wireless device B since the channel detection time unit of wireless device A is always earlier than the time unit of channel detection of wireless device B, wireless device B
  • the signal sent by the wireless device A can always be detected, so that the data transmission of the wireless device A blocks the channel access of the wireless device B, and the wireless device B cannot send data.
  • This application provides a communication method using an unlicensed frequency band, so that a wireless device can determine available COTs through one or more of the following signaling (and / or signals): physical layer signaling, physical layer reference signals, and higher layers Signaling.
  • the physical layer signaling includes one or more of the following signaling: physical control channel signaling, physical broadcast channel signaling.
  • the physical layer reference signal may be one or more of the following reference signals: synchronization reference signal, demodulation reference signal (DMRS), and phase-tracking reference signal (PT-RS) ), Time-frequency tracking reference signal (T-RS) and channel measurement reference signal (Channel-information-reference signal (CSI-RS).
  • DMRS demodulation reference signal
  • PT-RS phase-tracking reference signal
  • T-RS Time-frequency tracking reference signal
  • CSI-RS Channel measurement reference signal
  • the demodulation reference signal may be one or more of the following demodulation reference signals: the physical control channel demodulation reference signal, the broadcast channel demodulation reference signal, and the physical shared channel demodulation reference signal.
  • the synchronization signal includes a primary synchronization signal and / or a secondary synchronization signal.
  • the high-level signaling includes one or more of the following signaling: system broadcast information, UE-specific RRC signaling.
  • a wireless device is configured (or pre-assigned or pre-set) with a dedicated COT, or a dedicated frame.
  • the COT in the exclusive frame is an exclusive COT of the wireless device.
  • the exclusive frame and the exclusive COT represent the same concept, and can be used interchangeably in the following.
  • the wireless device does not need to detect or sense the channel occupancy condition before the start time domain position of its exclusive COT. In this way, a situation in which the wireless device cannot perform data transmission in its exclusive COT due to detection or perception of signals sent by other wireless devices can be avoided, thereby ensuring the reliability of data transmission.
  • the wireless device needs to detect or sense the channel occupancy condition before the starting time domain position of the wireless device.
  • the wireless device determines to use its exclusive COT, it sends indication information before the COT indicating whether the COT is occupied (or, whether it will be occupied. Or, whether it is exclusive. Or, whether it can be shared).
  • the wireless device determines to use its exclusive COT, it does not send the instruction information before the COT.
  • the instruction information is used to indicate that the exclusive COT is not occupied by the wireless device.
  • the wireless device determines not to use its exclusive COT, it sends instruction information before the COT indicating that the COT can be used by other wireless devices.
  • the wireless device determines not to use its exclusive COT, it does not send the instruction information before the COT.
  • the instruction information is used to indicate that the exclusive COT is occupied by the wireless device.
  • CCA or channel detection is performed. If other wireless devices determine that the above-mentioned COT is occupied, CCA and channel detection are no longer performed. Furthermore, waste of spectrum resources caused by detecting the same position in the time domain is avoided, and reliability of data transmission of wireless devices is guaranteed during spectrum sharing. That is, there is no situation that other wireless devices cannot use spectrum resources due to excessive use of spectrum resources by one wireless device. In addition, since wireless devices that interfere with each other will not compete successfully at the same time, the above scheme can also improve resource utilization, ensure the reliability of data transmission, and improve the efficiency of frequency-domain resource sharing.
  • the method 400 includes:
  • the first wireless device receives the first indication information within a first time unit.
  • the first indication information is used to indicate that the second time unit is used for the second wireless device to transmit data in the second time unit, or the first indication information is used to indicate that the second time unit is not used for the second wireless device in the second time unit
  • the data is transmitted internally, or the first indication information is used to indicate whether the second time unit is used for the second wireless device to transmit data in the second time unit, where the second time unit is a preset exclusive time of the second wireless device Unit, the time domain position of the first time unit is before the time domain position of the second time unit.
  • transmitting data refers to sending data and / or receiving data.
  • the first indication information may also be understood as the meaning shown below: the first indication information is used to indicate that the second time unit is available for the first wireless device to transmit data in the second time unit. Alternatively, the first indication information is used to indicate that the second time unit is unavailable for the first wireless device to transmit data in the second time unit. Alternatively, the first indication information is used to indicate whether the second time unit is available for the first wireless device to transmit data in the second time unit. Alternatively, the first indication information is used to indicate that the second time unit is a shareable time unit. Alternatively, the first indication information is used to indicate that the second time unit is a time unit that cannot be shared. Alternatively, the first indication information is used to determine whether the second time unit is a shareable time unit.
  • a time unit is referred to as a time unit that can be shared, which means that multiple wireless devices may occupy time domain and / or frequency domain resources within the time unit according to a rule (for example, a contention access mechanism). For example, the wireless device determines whether the channel status is idle through CCA. If the wireless device considers that the channel is free, the wireless device sends a signal (for example, one or more of physical layer signaling, physical layer reference signal, and higher layer signaling), which indicates that the above-mentioned time unit that can be shared is occupied. If the wireless device determines that the channel is occupied or the channel is busy, it gives up occupying the shareable time unit.
  • a signal for example, one or more of physical layer signaling, physical layer reference signal, and higher layer signaling
  • the first time unit may be one or more time slots, time domain symbols, or subframes before the second time unit.
  • the second time unit may be a COT, and may also be a time domain symbol, a time slot, a subframe, and the like.
  • the above definitions of the first time unit and the second time unit are merely examples, and the specific forms of the first time unit and the second time unit are not limited in this application.
  • the second time unit may be one or more time slots or a radio frame.
  • a time slot is a unit of time and contains 14 or 12 consecutive orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Under different subcarrier widths, the time length of a time slot decreases as the subcarrier width increases.
  • a radio frame is a unit of time with a length of 20 milliseconds in the time domain.
  • a radio frame includes multiple time slots, and the number of time slots included in different subcarrier widths is different. For example, with a 15kHz subcarrier width, a radio frame includes 10 time slots. With a 30kHz subcarrier width, a radio frame includes 20 time slots. With a 60kHz subcarrier width, a radio frame includes 40 time slots. With a 120kHz subcarrier width, a radio frame includes 80 time slots. With a 240kHz subcarrier width, a radio frame includes 160 time slots.
  • OFDM orthogonal frequency division multiplexing
  • the starting time domain position of the first time unit may be located at the starting time domain position of the idle period.
  • FIG. 5 illustrates a time-domain location diagram of a first time unit and a second time unit provided in the present application.
  • the time domain resources shown in FIG. 5 are divided into two time slots. That is, the first time slot and the second time slot. Each time slot is divided into 14 OFDM symbols.
  • the first time unit is an OFDM symbol with OFDM numbers 0 and 1 in the first time slot
  • the start time slot of the second time unit is a second time slot, where the time slot number of the first time slot is n and the second The slot number of the slot is n + 1.
  • the second time unit is a radio frame
  • the second time unit may include 10, 20, 40, 80, or 160 time slots, or the second time unit may include 9, 19, 39, 79 or 159 time slots.
  • the ending time domain position of the first time unit is located at the starting time domain position of the idle period.
  • the first time unit is the OFDM symbols with OFDM numbers 12 and 13 in the first time slot
  • the start time slot of the second time unit is the second time slot, where the time slot number of the first time slot is n
  • the slot number of the second slot is n + 2.
  • the second time unit is a radio frame
  • the second time unit may include 10, 20, 40, 80, or 160 time slots, or the second time unit may include 9, 19, 39, 79 or 159 time slots.
  • the first indication information may have different expressions.
  • the first indication information may be carried in downlink control information (DCI), and the downlink control information is in a common search space.
  • the first indication information may be carried in a field of the DCI.
  • the content indicated by the first indication information may be represented by taking different values in the fields in the DCI. For example, if the value of the field in the DCI is the first value (such as 1), the first indication information indicates that the second time unit is not used for data transmission by the second wireless device, or the second time unit can be used for the first wireless The device transmits data, or the second time unit is a shareable time unit.
  • the first indication information in the DCI is a second value (such as 0)
  • the first indication information indicates that the second time unit is used for the second wireless device to transmit data, or the second time unit is not available for the first wireless device
  • the device transmits data, or the second time unit is a non-shareable time unit.
  • the first indication information is carried in a reference signal sequence.
  • the first indication information carried by the first reference signal indicates that the second time unit is a time unit that cannot be shared.
  • the first indication information carried in the second reference signal indicates that the second time unit is a shareable time unit.
  • the first wireless device has different processing methods according to the content indicated by the first instruction information. That is, the first wireless device may perform step 420 or step 430 described below. Steps 420 and 430 are optional steps.
  • Step 420 The first wireless device performs channel detection and / or CCA in a third time unit.
  • the first indication information indicates that the second time unit is not used for data transmission by the second wireless device, or that the second time unit can be used for data transmission by the first wireless device, or that the second time unit is a shareable time unit.
  • the start time domain position of the third time unit is after the time domain position of the first time unit, and the start time domain position of the third time unit is before the time domain position of the second time unit.
  • the third time unit may be a time slot, an OFDM symbol or a subframe, and may also be another time unit.
  • the specific form of the third time unit is not limited in this application.
  • the first wireless device may determine the third time unit in the following two ways.
  • the first wireless device may randomly determine the third time unit among the plurality of time units.
  • one time slot includes multiple time units available for channel detection and / or CCA, and the multiple time units do not overlap in the time domain, or the OFDM symbol numbers of the multiple time units are different.
  • FIG. 6 illustrates a time-domain location diagram of a third time unit provided by the present application.
  • the time domain resources shown in FIG. 6 are divided into two time slots. That is, the first time slot and the second time slot.
  • Each time slot is divided into 14 OFDM symbols.
  • the time domain length of the time unit that can be used for channel detection and / or CCA is 1 OFDM symbol.
  • the OFDM symbol number is any of the time units of 7, 8, 9, 10, 11, 12, and 13.
  • Different wireless devices determine different time units for channel detection and / or CCA.
  • the third time unit determined by the first wireless device may be a time unit whose OFDM symbol number is 9 in the first time slot.
  • Multiple time units for channel detection and / or CCA can be configured by high-level signaling, or are predefined, or there is a corresponding relationship with the frame length. That is, the first wireless device may determine multiple time units for channel detection and / or CCA according to the frame length.
  • the high-level signaling includes configuration information of the frame length
  • the first wireless device obtains the configuration information of the frame length in the high-level signaling.
  • the frame length is 10 milliseconds
  • the time domain length of the multiple time units for channel detection and / or CCA may be 0.5 milliseconds.
  • the frame length is 5 milliseconds
  • the time domain length of multiple time units used for channel detection and / or CCA may be 0.25 milliseconds.
  • the plurality of time units for channel detection and / or CCA may be one or more time units.
  • the time granularity of the multiple time units may be a preset time granularity, and the size of the time granularity is not limited in this application.
  • the multiple time units may be multiple OFDM symbols in one frame, or multiple time slots.
  • the third time unit and the first time unit may be located in the same time slot or in different time slots.
  • a third wireless device further exists in a communication system where the first wireless device and the second wireless device are located.
  • the third wireless device acquires the first instruction information, and according to the first instruction information, it is determined that the second time unit is not used for the second wireless device to transmit data, or the second time unit can be used for the third wireless device to transmit data.
  • the first indication information is used when the second time unit is a shareable time unit.
  • the third wireless device determines a seventh time unit among a plurality of time units available for channel detection and / or CCA. For example, as shown in FIG.
  • the third wireless device obtains the first indication information in the first time unit and determines that the second time unit can be shared, and then the third wireless device may determine that the OFDM symbol number in the first time slot is 11
  • the OFDM symbol is the seventh time unit.
  • the seventh time unit is used for channel detection and / or CCA by the third wireless device.
  • the wireless device may determine the time domain position of the time unit used for channel detection and / or CCA according to the size of the data transmission priority. If the data transmission priority of the first wireless device is higher than the data transmission priority of the third wireless device, the time unit (ie, the third time unit) for performing channel detection and / or CCA by the first wireless device is in a time domain position A time unit earlier than the third wireless device for channel detection and / or CCA (ie, the seventh time unit). As shown in FIG. 5, if the data transmission priority of the first wireless device is higher than the data transmission priority of the second wireless device, the time unit for performing channel detection and / or CCA by the first wireless device is the OFDM symbol in the first time slot. The number of OFDM symbols is 9.
  • the time unit for the third wireless device to perform channel detection and / or CCA is the OFDM symbol with the OFDM symbol number 11 in the first slot, and the OFDM symbol with the OFDM symbol number 9 is earlier in the time domain.
  • the OFDM symbol number is 11 for the OFDM symbol.
  • the priority of the data transmission may be determined according to data transmission parameters, wherein the data transmission parameters include one or more of the following parameters: the number of time domain symbols occupied by the data transmission, and the downlink response to the uplink response information (E.g., positive acknowledgement (ACK) or negative acknowledgement information (NACK)), the time domain interval of the transmission, or the delay of the service.
  • the data transmission parameters include one or more of the following parameters: the number of time domain symbols occupied by the data transmission, and the downlink response to the uplink response information (E.g., positive acknowledgement (ACK) or negative acknowledgement information (NACK)), the time domain interval of the transmission, or the delay of the service.
  • ACK positive acknowledgement
  • NACK negative acknowledgement information
  • the wireless device is assigned a dedicated time unit to ensure reliable transmission of the wireless device. It avoids the problems described in the background art.
  • the dedicated time units of different wireless devices do not overlap in the time domain, or partially overlap, or completely overlap.
  • the relationship between the time domain resources of the dedicated time units of different wireless devices is related to the interference between the wireless devices. If the channel or signal interference between different wireless devices is small, the dedicated time units of the different wireless devices may partially or completely overlap in the time domain. If the channel or signal interference between different wireless devices is large, the dedicated time units of the different wireless devices do not overlap in the time domain.
  • the current wireless communication environment of the second wireless device is better.
  • the priority of the data currently to be transmitted by the second wireless device is lower.
  • the first wireless device has urgent data to be transmitted.
  • the second wireless device may indicate that the second time unit is available for use by other wireless devices (eg, the first wireless device).
  • the second wireless device indicates that a second time unit is available for sharing. This improves the utilization of the license-free frequency domain resources.
  • the second wireless device may send indication information carrying a wireless device identifier or a wireless device group identifier.
  • the first wireless device receives the foregoing indication information including the identifier of the first wireless device, it is determined that the first wireless device can use the second time unit.
  • the first wireless device receives the foregoing indication information that does not include the identifier of the first wireless device, it is determined that the first wireless device cannot use the second time unit.
  • the first wireless device needs to perform step 430.
  • Step 430 The first wireless device does not perform channel detection and / or CCA before the second time unit, wherein the first indication information is used to indicate that the second time unit is used for the second wireless device to transmit data, or the second time The unit cannot be used for the first wireless device to transmit data, or the second time unit is a non-shareable time unit.
  • the first wireless device does not need to perform channel detection and / or CCA before the start time domain position of the second time unit.
  • the first wireless device can reduce the frequency of channel detection and / or CCA, and save energy consumption of the first wireless device.
  • the second wireless device it indicates that the second time unit is unavailable for sharing, so that the second time unit is a time unit exclusive to the second wireless device. Since there is no other wireless device in the second time unit, the magnitude of the interference experienced by the second wireless device is further reduced, which improves the spectral efficiency of data transmission by the second wireless device.
  • the data transmission reliability of the second wireless device can also be further improved, because there are multiple predefined resources in the system that can be used as the time unit dedicated to the second wireless device.
  • the second wireless device may send the second indication information.
  • the second indication information is used to indicate that the second time unit cannot be shared. For example, if the terminal device associated with the second wireless device has urgent data to transmit, and the second wireless device has sent the first instruction information indicating that the second time unit can be shared, the second wireless device may send the second instruction information. .
  • the first wireless device may determine, according to the first instruction information, that the second time unit is not used for data transmission by the second wireless device, or that the second time unit is a shareable time unit. Subsequently, the first wireless device receives or detects the second indication information in a fourth time unit.
  • the second indication information is used to indicate that the second time unit is used for data transmission by the second wireless device, or that the second time unit is a time unit that cannot be shared.
  • the ending time domain position of the fourth time unit is before the ending time domain position of the second time unit.
  • the ending time domain position of the fourth time unit is a starting time domain position at the second time unit.
  • the second wireless device may send the second indication information.
  • the second indication information is used to indicate that the second time unit can be shared. For example, if the second wireless device has sent the first instruction information indicating that the second time unit cannot be shared, but the second wireless device determines that data transmission is no longer being performed, the second wireless device may send the second instruction information.
  • the first wireless device after the first wireless device receives the first instruction information, it may be determined according to the first instruction information: the second time unit is used for the second wireless device to transmit data, or the second time unit is a time that may not be shared unit. Subsequently, the first wireless device receives or detects the second indication information in a fourth time unit.
  • the second indication information is used to indicate that the second time unit is not used for the second wireless device to transmit data, or that the second time unit is a shareable time unit.
  • the ending time domain position of the fourth time unit is before the ending time domain position of the second time unit.
  • the ending time domain position of the fourth time unit is a starting time domain position at the second time unit.
  • the second instruction information may indicate that all wireless devices except the second wireless device may use the second time unit.
  • the second instruction information indicates that a specific wireless device can use a second time unit, including the second wireless device.
  • the second instruction information includes an identifier of a wireless device capable of using the second time unit, or the second instruction information includes a group identifier of the wireless device capable of using the second time unit.
  • the second indication information is carried in downlink control information.
  • the downlink control information may include an identifier of a wireless device capable of using the second time unit.
  • the first wireless device obtains the identifier of the first wireless device from the downlink control information, the first wireless device determines that the second time unit can be used. Otherwise, the first wireless device determines that the second time unit cannot be used.
  • the second indication information may be a scrambling code on a cyclic redundancy check (cyclic redundancy check) (CRC) of the downlink control information.
  • CRC cyclic redundancy check
  • the first wireless device blindly detects the DCI at the fourth time unit.
  • the CRC of the DCI is scrambled by the unique identifier of the first wireless device.
  • the first wireless device determines that the first wireless device can use the second time unit.
  • the first wireless device determines that the first wireless device cannot use the second time unit.
  • the second indication information is carried by a scrambling code sequence of the downlink control information.
  • the bit sequence after performing channel coding and rate matching on the downlink control information can be recorded as b (0), b (1), ..., b (N-1).
  • the generated scrambling code sequence can be written as c (0), c (1), ...
  • the initial value of the generated scrambling code sequence is c init .
  • the scrambled bit sequence is denoted as b '(0), b' (1), ..., b '(N-1).
  • N is the length of the bit sequence after rate matching
  • is a real number related to the identity of the wireless device
  • mod is a remainder function
  • i is a serial number
  • the value is one of 0 to N-1.
  • the initialization value for generating the scrambling code sequence is determined by the identity of the wireless device.
  • the initial value c init for generating the scrambling code sequence is a function related to the identification of the wireless device.
  • the device identifies the real number, and the first wireless device determines that the second time unit is available. If the first wireless device detects that the initialization value of the scrambling sequence of the downlink control information is generated according to the identifier of the first wireless device, the first wireless device determines that the second time unit is available.
  • the device identifier is an unrelated real number, and the first wireless device determines that the second time unit is unavailable. If the first wireless device detects that the initialization value of the scrambling code sequence of the downlink control information is not generated based on the identifier of the first wireless device, the first wireless device determines that the second time unit is unavailable.
  • the second indication information is carried by a reference signal sequence.
  • An initial value of the reference signal sequence is a function related to the wireless device ID, and a reference signal sequence is generated according to the initial value.
  • the first wireless device detects the received reference signal sequence according to the reference signal sequence generated by the identifier of the first wireless device.
  • the first wireless device detects a reference signal sequence generated according to the identifier of the first wireless device, and determines that the first wireless device can use the second time unit.
  • the first wireless device does not detect the reference signal sequence generated according to the identifier of the first wireless device, it is determined that the first wireless device cannot use the second time unit.
  • the above reference signal sequence may be at least one of the following reference signal sequences: a downlink control channel reference signal sequence, a broadcast channel reference signal sequence, an uplink or downlink shared channel reference signal sequence, a channel measurement reference signal sequence, or a time-frequency synchronization reference Signal sequence, synchronization signal reference signal sequence.
  • the identifier of the wireless device carried in the second instruction information may be an identifier of a wireless device or an identifier of a group of wireless devices, which is not limited in this application.
  • the indication method of the second indication information is also applicable to the first indication information.
  • the first wireless device may also determine whether it can use the second time unit by detecting whether the second instruction information is detected, or the first wireless device may also Whether the second indication information is detected determines whether it performs channel detection and / or CCA.
  • the first wireless device determines to perform channel detection and / or CCA next.
  • the first wireless device determines that channel detection and / or CCA are no longer performed.
  • the first wireless device After the first wireless device acquires the second indication information in the fourth time unit, it may perform channel detection and / or CCA in the fifth time to determine whether the channel busy condition of the second time unit meets the transmission requirements of the first wireless device. .
  • the fifth time unit is located after the fourth time unit, and the fifth time unit is located before the termination time domain position of the second time unit.
  • FIG. 7 is another example of a communication method using an unlicensed band provided by the present application.
  • the application is further described by taking the first wireless device as the first base station and the second wireless device as the second base station as an example.
  • the time domain resource shown in FIG. 7 is divided into multiple time units.
  • the second time unit includes a part for uplink transmission and a part for downlink transmission.
  • the second time unit is a time unit for transmitting data by the second base station.
  • the second time unit includes multiple OFDM symbols. Some OFDM symbols are used for downlink transmission, some OFDM symbols are used for uplink transmission, and two OFDM symbols between the OFDM symbol used for downlink transmission and the OFDM symbol used for uplink transmission are used for Uplink and downlink switching.
  • the above-mentioned structure of the second time unit is merely an example, and the second time unit may also be used only for uplink transmission or only for downlink transmission.
  • the second base station sends the first indication information in the first time unit to indicate that the second time unit is occupied.
  • the third time unit is, for example, a preset time unit for the first base station to perform CCA, and the first base station obtains the first indication information. After that, CCA is no longer performed in the third time unit, and waits for the arrival of the time unit belonging to the first base station.
  • the second base station determines that the second time unit is no longer shared exclusively, the second base station sends second instruction information at the fourth time unit, the second instruction information indicates that the second time unit can be used, and the first base station obtains the second instruction After the information, if the first base station decides to use the second time unit, the first base station may perform CCA within the fifth time unit to determine that the second time unit is not used by other wireless devices.
  • the third time unit and the fifth time unit may be the same time unit or different time units.
  • the first wireless device may perform CCA directly in the third time unit, that is, the third time unit coincides with the fifth time unit; for example, if the time domain position of the fourth time unit is in the time domain of the third time unit After the location, the first wireless device cannot use the third time unit for CCA.
  • the first wireless device can perform CCA in the fifth time unit.
  • the fifth time unit can be a preset time unit or the first wireless device. A time unit determined by a rule.
  • the above describes the method for the first wireless device to communicate using the unlicensed frequency band as the device receiving the first indication information. It can be understood that the first wireless device does not always use the unlicensed frequency band as the device receiving the first indication information.
  • the first wireless device may send instruction information indicating that the dedicated time unit is occupied and other wireless devices may not use it, and the second wireless device receives the instruction information Then no longer compete for this exclusive time unit.
  • the method for sending the instruction information by the first wireless device reference may be made to the following example of sending the first instruction information by the second wireless device.
  • the method 800 includes:
  • the second wireless device obtains the first instruction information, where the first instruction information is used to instruct the second wireless device to transmit data in the second time unit, or the first instruction information is used to indicate that the second wireless device is not in the second time unit. To transmit data internally, or the first indication information is used to indicate whether the second wireless device transmits data in a second time unit, and the second time unit is a preset time unit exclusive to the second wireless device.
  • the second wireless device sends the first indication information within the first time unit, and the time domain position of the first time unit is before the time domain position of the second time unit.
  • second wireless device first indication information
  • first time unit first time unit
  • second time unit second time unit
  • the first indication information may be information generated by the second wireless device, information received by the second wireless device from other devices, or information read by the second wireless device from a storage medium.
  • the second time unit is a dedicated time unit of the second wireless device, and the second wireless device may adopt a different processing mode according to whether it uses the second time unit to transmit data.
  • the second wireless device may adopt the following processing manner.
  • the second wireless device acquires and sends the first instruction information, and the first instruction information is used to instruct the second wireless device to transmit data using the second time unit.
  • the first instruction information may instruct the second wireless device to transmit data by using the second time unit in multiple ways.
  • the first instruction information indicates that the second time unit is a non-shared time unit, or the first instruction information indicates that wireless devices other than the second wireless device are prohibited from using the second time unit. This application does not limit the specific form of the first instruction information.
  • the second wireless device After the second wireless device sends the first instruction information, data can be sent and received in a dedicated time unit (ie, a second time unit) of the second wireless device. In this way, the second wireless device can send and receive data in a time unit in which transmission reliability is guaranteed, thereby improving the reliability of the wireless device using the unlicensed frequency band for communication.
  • a dedicated time unit ie, a second time unit
  • the second wireless device does not send the first instruction information, and the first instruction information is used to instruct the second wireless device not to use the second time unit to transmit data.
  • the first indication information may instruct the second wireless device not to use the second time unit to transmit data in multiple ways.
  • the first instruction information indicates that the second time unit is a shared time unit, or the first instruction information indicates that wireless devices other than the second wireless device are allowed to use the second time unit. This application does not limit the specific form of the first instruction information.
  • a wireless device (for example, the first wireless device) other than the second wireless device may detect the first instruction information within a preset time unit (for example, the first time unit). If the first wireless device does not detect the first instruction information , The first wireless device determines that the first wireless device cannot use the second time unit.
  • a preset time unit for example, the first time unit
  • the second wireless device After the second wireless device determines not to send the first instruction information, it can send and receive data in a dedicated time unit (ie, a second time unit) of the second wireless device. In this way, the second wireless device can send and receive data in a time unit in which transmission reliability is guaranteed, thereby improving the reliability of the wireless device using the unlicensed frequency band for communication.
  • a dedicated time unit ie, a second time unit
  • the second wireless device determines not to use the second time unit to transmit data. For example, if the current wireless communication environment of the second wireless device is good, or the priority of the data currently to be transmitted by the second wireless device is low, or the first wireless device has urgent data to transmit, the second wireless device may instruct the first wireless device.
  • the two time units can be used by other wireless devices (for example, the first wireless device), thereby improving the utilization rate of the unlicensed transmission resource and the flexibility of using the unlicensed frequency band for transmission.
  • the second wireless device may take the following processing methods to instruct other wireless devices to use the second time unit.
  • the second wireless device acquires and sends the first instruction information, and the first instruction information is used to instruct the second wireless device not to use the second time unit to transmit data.
  • the first indication information may instruct the second wireless device not to use the second time unit to transmit data in multiple ways.
  • the first instruction information indicates that the second time unit is a shared time unit, or the first instruction information indicates that wireless devices other than the second wireless device are allowed to use the second time unit. This application does not limit the specific form of the first instruction information.
  • a wireless device (for example, the first wireless device) other than the second wireless device may detect the first instruction information within a preset time unit (for example, the first time unit). If the first wireless device detects the first instruction information, Then, the first wireless device determines that the first wireless device can use the second time unit, and the first wireless device can choose to perform channel detection and / or CCA in the third time unit.
  • a preset time unit for example, the first time unit.
  • the second wireless device does not send the first instruction information, and the first instruction information is used to instruct the second wireless device to transmit data using the second time unit.
  • the first instruction information may instruct the second wireless device to transmit data by using the second time unit in multiple ways.
  • the first instruction information indicates that the second time unit is a non-shared time unit, or the first instruction information indicates that wireless devices other than the second wireless device are prohibited from using the second time unit. This application does not limit the specific form of the first instruction information.
  • a wireless device (for example, the first wireless device) other than the second wireless device may detect the first instruction information within a preset time unit (for example, the first time unit). If the first wireless device does not detect the first instruction information , The first wireless device determines that the first wireless device can use the second time unit, and the first wireless device can choose to perform channel detection and / or CCA in the third time unit.
  • a preset time unit for example, the first time unit.
  • the method 800 further includes :
  • the second wireless device sends second instruction information in the fourth time unit, the second instruction information is used to indicate that the first wireless device cannot transmit data in the second time unit, or the second instruction information is used to indicate the second time unit It cannot be shared, and the ending time domain position of the fourth time unit is before the ending time domain position of the second time unit.
  • the second wireless device may send the second indication information ,
  • the second indication information indicates that the second time unit cannot be shared.
  • the second wireless device may send The second indication information is used to indicate that the second time unit can be shared.
  • the method 800 when the first indication information instructs the second wireless device to transmit data using the second time unit, or when the first indication information indicates that the second time unit cannot be shared, the method 800 further includes :
  • the second wireless device sends second instruction information in a fourth time unit, the second instruction information is used to indicate that the first wireless device can transmit data in the second time unit, or the second instruction information is used to indicate the second time unit It can be shared that the ending time domain position of the fourth time unit precedes the ending time domain position of the second time unit.
  • the “second instruction information” in the method 800 may be equivalent to or refer to the “second instruction information” in the method 400, and for the sake of brevity, the details are not described herein again.
  • the second wireless device sends the second instruction information, indicating that the second wireless device shares the second time unit with other wireless devices. If the second wireless device also wants to transmit data on the second time unit, the second wireless device needs to communicate with other The wireless devices (including the first wireless device) compete for the right to use the second time unit.
  • FIG. 9 shows a schematic diagram of a second wireless device competing for a right to use a second time unit.
  • the time domain resource shown in FIG. 9 is divided into multiple time units.
  • the second time unit includes a part for uplink transmission and a part for downlink transmission.
  • the second time unit is used for transmitting data by the second base station (that is, the second wireless device).
  • the second time unit includes multiple OFDM symbols. Some OFDM symbols are used for downlink transmission, some OFDM symbols are used for uplink transmission, and two OFDM symbols between the OFDM symbol used for downlink transmission and the OFDM symbol used for uplink transmission are used Uplink and downlink switching.
  • the above-mentioned structure of the second time unit is merely an example, and the second time unit may also be used only for uplink transmission or only for downlink transmission.
  • the second base station sends the first indication information in the first time unit to indicate that the second time unit is occupied.
  • the second base station determines that the second time unit is no longer shared exclusively, the second base station sends second instruction information at the fourth time unit, which indicates that the second time unit can be used by other base stations except the second base station .
  • the sixth time unit may be a preset time unit or a time unit determined by the second wireless device according to a rule.
  • the sixth time unit may be one or more time slots, and may also be one or more OFDM symbols. The specific form of the sixth time unit is not limited in this application.
  • the method 800 further includes:
  • the second wireless device determines a second time unit.
  • the second wireless device may determine the second time unit according to a preset rule, or may obtain high-level signaling, and determine the second time unit according to the high-level signaling.
  • the second wireless device may determine the second time unit before acquiring the first indication information, or may determine the second time unit after acquiring the first indication information.
  • the following uses the second wireless device as a second base station as an example, and provides an example in which the second wireless device determines a second time unit after acquiring the first instruction information.
  • the terminal equipment associated with the second base station After the second base station sends the first indication information indicating that the second base station does not transmit data in the second time unit, the terminal equipment associated with the second base station has urgent data to transmit. Then, the second base station may send second indication information indicating that the foregoing second time unit cannot be shared. That is, the second base station determines the second time unit after transmitting the first instruction information.
  • the second wireless device may determine the second time unit from a plurality of candidate dedicated time units.
  • the second wireless device may obtain the configuration information of the candidate dedicated time unit or the configuration information of the dedicated time unit through the high-level parameters.
  • the configuration information of the candidate exclusive time unit or the configuration information of the exclusive time unit includes one or more of the following information: the period of the candidate exclusive time unit, the time domain length of the candidate exclusive time unit, and the time of the candidate exclusive time unit.
  • the following configuration methods are also applicable to obtaining the configuration information of the dedicated time unit.
  • the time slots in a radio frame are numbered from 0 to 9. If m is equal to 5, since 0mod5 is equal to 0 and 5mod5 is equal to 0, the candidate exclusive time unit The starting time-domain positions are time slot 0 and time slot 5.
  • the time slots in a radio frame are numbered from 0 to 9. If m is equal to 10, since 0 mod is equal to 0, the starting time domain position of the candidate exclusive time unit Is time slot 0.
  • the timeslots in a radio frame are numbered from 0 to 19, if m is 5, because 0mod5 is 0, 5mod5 is 0, 10mod5 is 0, and 15mod5 It is equal to 0. Therefore, the starting time domain positions of the candidate exclusive time unit are time slot 0, time slot 5, time slot 10, and time slot 15.
  • the second wireless device determines the starting time domain position of the candidate exclusive time unit, it may be based on the time domain length of the candidate exclusive time unit, the offset of the candidate exclusive time unit in the time domain, or consecutive candidate exclusive time units within a period The number determines the ending time-domain position of the candidate-specific time unit.
  • FIG. 10 is a schematic diagram of a method for determining a candidate exclusive time unit provided by the present application.
  • a radio frame includes 10 time slots, and the numbers are 0 to 9 respectively.
  • the second wireless device determines that the starting time domain position of the candidate exclusive time unit is slot 0, and the second wireless device determines that the time length of the candidate exclusive time unit is 3 slots, then the second wireless device determines the candidate exclusive time
  • the units are time slot 0, time slot 1 and time slot 2 in the radio frame.
  • the second wireless device determines that the starting time domain position of the candidate exclusive time unit is time slot 0, and the second wireless device determines that the offset of the candidate exclusive time unit in the time domain is 3 time slots.
  • the two wireless devices determine that the candidate exclusive time unit is time slot 0, time slot 1 and time slot 2 in the wireless frame.
  • the second wireless device determines that the starting time domain position of the candidate exclusive time unit is time slot 0, and the second wireless device determines that the number of consecutive candidate exclusive time units in a period is 3 time slots, then, the second wireless device The device determines that the candidate exclusive time unit is time slot 0, time slot 1 and time slot 2 in the radio frame.
  • time slot 0, time slot 1 and time slot 2 are, for example, the second time unit described in the method 400 and the method 800.
  • the period of the candidate exclusive time unit (also referred to as an “access cycle”) is used to indicate the frequency with which the candidate exclusive time unit appears. For example, if the time domain length of the candidate exclusive time unit is 1 radio frame and the period of the candidate exclusive time unit is 2 radio frames, two adjacent candidate exclusive time units are separated by one radio frame. For another example, if the time domain length of the candidate exclusive time unit is 1 radio frame, and the period of the candidate exclusive time unit is 1 radio frame, there is no interval in the time domain between every two adjacent candidate exclusive time units.
  • the granularity of the frequency domain resources corresponding to the candidate exclusive time unit may be a physical resource block, where one physical resource block includes 12 subcarriers in the frequency domain that are consecutive in the frequency domain.
  • the granularity of the frequency domain resources corresponding to the candidate exclusive time unit may be a bandwidth region, that is, a bandwidth (part bandwidth) (BWP). For example, if the configuration information in the high-level parameters includes BWP index 0 and BWP index 2, the frequency domain resources in the candidate exclusive time unit are the frequency domain resources corresponding to BWP index 0 and BWP index 2.
  • the communication system can configure 4 BWPs for each wireless device.
  • Each BWP includes continuous physical resource blocks in the frequency domain, and the maximum number of physical resource blocks included in a BWP is 275.
  • Each BWP corresponds to a BWP index, that is, BWP index 0, BWP index 1, BWP index 2, and BWP index 3.
  • the resources in the frequency domain of different BWP indexes may overlap or partially overlap, or they may not overlap at all.
  • the frequency domain resources included in each BWP have a frequency domain granularity of 20 MHz, that is, the physical resource blocks included in each BWP satisfy an integer multiple of 20 MHz in the frequency domain.
  • the number of RBs included in the BWP is 100, or 200, or 300, or 400.
  • the number of RBs included in the BWP is 50, or 100, or 150, or 200.
  • the number of RBs included in the BWP is 25, or 50, or 75, or 100.
  • the number of RBs included in the BWP is 12, or 25, or 37, or 50.
  • the number of RBs included in the BWP is 7, or 12, or 25.
  • the second wireless device may determine a time unit dedicated to the second wireless device candidate or a dedicated time unit, that is, the second time unit according to the priority of the wireless device.
  • the second wireless device determines the candidate dedicated time unit of the second wireless device according to the service priority of the second wireless device, where the service priority is related to the number of time units dedicated to other wireless devices experienced by the second wireless device. If the initial priority of the second wireless device is 0, after an access period ends, the number of time units dedicated to other wireless devices experienced by the second wireless device is 1, then the priority is 1. If the initial priority of the second wireless device is 0, after an access period ends, the number of time units dedicated to other wireless devices experienced by the second wireless device is 2, the priority is 2, and so on. The more the number of time units dedicated to other wireless devices experienced by the second wireless device, the higher the service priority of the second wireless device. In addition, if the second wireless device transmits data in its dedicated time unit, the service priority of the second wireless device is reduced to the lowest priority.
  • FIG. 11 is a schematic diagram of another method for determining a candidate exclusive time unit provided by the present application.
  • each access cycle is a radio frame.
  • a radio frame contains 10 time slots, and the numbers are 0 to 9 respectively.
  • the priority of the service carried by the second wireless device is the lowest priority 0, the priority of the service carried by the second wireless device is priority 1, and the third wireless device The priority of the carried service is priority 2, where priority 2 is the highest priority; after the first access cycle ends, the third wireless device is a dedicated wireless device for the subsequent second access cycle, where the wireless device Whether the next time unit is a dedicated time unit of the wireless device is determined according to whether the priority of the carried service is the highest priority.
  • the services carried by the third wireless device are reduced to the lowest priority, while the services carried by the second wireless device and the second wireless device will increase in priority. Among them, the services carried by the second wireless device have priority.
  • the priority is priority 1 and the priority of the service carried by the second wireless device is priority 2. Furthermore, the second wireless device occupies a subsequent third access cycle; after the third receiving cycle ends, the service of the second wireless device has priority The level is 2, and the service priority of the second wireless device rises to the highest priority. Then, the second wireless device determines that the next access period adjacent to the third access period is the exclusive access period of the second wireless device.
  • the initial value and the maximum value of the priority can be configured by a high-level parameter or predefined.
  • This application also provides a method 1200 for communicating using an unlicensed frequency band.
  • the first indication information indicates only one kind of content.
  • the first wireless device determines whether the first wireless device can use the dedicated time unit (ie, the second time unit) of the second wireless device by detecting whether the first indication information is used. As shown in FIG. 12, the method 1200 includes the following steps.
  • the first wireless device detects the first instruction information in the first time unit, the first instruction information is used to instruct the second wireless device to transmit data in the second time unit, or the first instruction information is used to instruct the second wireless device.
  • the device transmits data in a second time unit, or the first indication information is used to indicate whether the second wireless device transmits data in a second time unit, where the second time unit is preset for transmission by the second wireless device.
  • the time unit of the data, the time domain position of the first time unit is before the time domain position of the second time unit.
  • the subsequent steps performed by the first wireless device are different according to the content indicated by the first instruction information.
  • the first wireless device executes step 1220 or step 1230.
  • Step 1220 The first wireless device performs channel detection and / or CCA in the third time unit according to the detected first instruction information.
  • Step 1230 The first wireless device determines not to perform channel detection and / or CCA according to the first indication information that is not detected.
  • the first wireless device executes step 1240 or step 1250.
  • Step 1240 The first wireless device performs channel detection and / or CCA in the third time unit according to the first indication information that is not detected.
  • Step 1250 The first wireless device determines not to perform channel detection and / or CCA according to detecting the first indication information.
  • the first instruction information in the method 1200 is the same as the first instruction information in the method 400. For brevity, only one example is given here.
  • the first wireless device determines that the first indication information is detected. If the first wireless device does not detect the reference signal sequence X within the first time unit, the first wireless device determines that the first indication information is not detected.
  • the first wireless device may perform a corresponding step according to the content indicated by the first instruction information.
  • the content indicated by the first instruction information is preset, that is, the first wireless device already knows the content indicated by the first instruction information before detecting the first instruction information.
  • a wireless device is assigned a dedicated time unit (the dedicated time units of multiple wireless devices may partially or completely overlap in the time domain), which ensures the transmission reliability of the wireless device and avoids The problems described in the background are addressed.
  • the current wireless communication environment of the second wireless device is good, or the priority of data to be transmitted by the second wireless device is low, or the first wireless device has urgent data to be transmitted, and the second The wireless device can indicate that the second time unit can be used by other wireless devices (for example, the first wireless device), thereby improving the utilization rate of the unlicensed transmission resource and the flexibility of the unlicensed transmission.
  • the first wireless device since the first wireless device determines whether to perform channel detection and / or CCA according to whether the first indication information is detected, the first wireless device can reduce the frequency of channel detection and / or CCA, and save energy consumption of the first wireless device. .
  • the second wireless device it indicates that the second time unit is unavailable for sharing, so that the second time unit is a time unit exclusive to the second wireless device. Since there is no other wireless device in the second time unit, the magnitude of the interference experienced by the second wireless device is further reduced, which improves the spectral efficiency of data transmission by the second wireless device.
  • the data transmission reliability of the second wireless device can also be further improved, because there are multiple predefined resources in the system that can be used as the time unit dedicated to the second wireless device.
  • method 1200 after the first wireless device determines whether the second time unit can be shared (or after the first wireless device determines whether the second wireless device transmits data in the second time unit), subsequent processing
  • the method may be the same as the processing method in method 400. For brevity, details are not described herein again.
  • a communication device using an unlicensed frequency band includes a hardware structure and / or a software module corresponding to each function.
  • this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • This application can divide the functional units of a communication device using an unlicensed frequency band according to the above method example.
  • each function can be divided into various functional units, or two or more functions can be integrated into one processing unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit. It should be noted that the division of the units in this application is schematic, and it is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device may be applicable to the system shown in FIG. 1 to implement the functions of the first network device or the second network device in the foregoing method embodiment.
  • FIG. 13 shows only the main components of the terminal device.
  • the terminal device 1300 includes a processor, a memory, a control circuit, an antenna, and an input / output device.
  • the processor is mainly used to process the communication protocol and communication data, and control the entire terminal device, execute a software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the foregoing method embodiments, such as Send uplink data according to the reference signal indication information.
  • the memory is mainly used for storing software programs and data, for example, storing various instruction information described in the foregoing embodiments.
  • the control circuit is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input / output devices such as a touch screen, a display screen, and a keyboard, are mainly used to receive data input by the user and output data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. After the radio frequency circuit processes the baseband signal, the radio frequency signal is sent out in the form of electromagnetic waves through the antenna.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG. 13 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or a storage device, which is not limited in this application.
  • the processor may include a baseband processor and / or a central processor.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processor is mainly used to control the entire terminal device.
  • Execute the software program process the data of the software program.
  • the processor in FIG. 13 may integrate the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, which are interconnected through technologies such as a bus.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing communication protocols and communication data may be built in the processor or stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and the control circuit having the transmitting and receiving function may be regarded as the transmitting and receiving unit 1301 of the terminal device 1300, for example, for supporting the terminal device to perform the receiving function as shown in FIG. 4, or for supporting the terminal
  • the device performs the sending function shown in FIG. 8, or supports the terminal device to perform the detection function shown in FIG.
  • a processor having a processing function is regarded as a processing unit 1302 of the terminal device 1300.
  • the terminal device 1300 includes a transceiver unit 1301 and a processing unit 1302.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • the device used to implement the receiving function in the transceiver unit 1301 can be regarded as a receiving unit, and the device used to implement the transmitting function in the transceiver unit 1301 can be regarded as a transmitting unit, that is, the transceiver unit 1301 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be called a receiver, an input port, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit.
  • the processor 1302 may be configured to execute instructions stored in the memory to control the transceiver unit 1301 to receive signals and / or send signals to complete functions of the terminal device in the foregoing method embodiments.
  • the function of the transceiver unit 1301 may be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • FIG. 14 is a schematic structural diagram of a network device provided in this application.
  • the network device may be, for example, a base station. As shown in FIG. 14, the base station can be applied to the system shown in FIG. 1 to implement the functions of the first wireless device or the second wireless device in the foregoing method embodiment.
  • the base station 1400 may include one or more radio frequency units, such as a remote radio unit (RRU) 1401 and one or more baseband units (BBU) (also referred to as a digital unit (DU) ) 1402.
  • RRU 1401 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 14011 and a radio frequency unit 14012.
  • the RRU 1401 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for supporting a base station to perform a sending function as shown in FIG. 8.
  • BBU 1402 is mainly used for baseband processing and base station control. RRU 1401 and BBU 1402 can be physically located together, or they can be physically separated, that is, distributed base stations.
  • BBU 1402 is the control center of the base station, which can also be called the processing unit. It is mainly used to complete the baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on.
  • a BBU (Processing Unit) 1402 may be used to control a base station to perform the operation procedure on a network device in the foregoing method embodiment.
  • the BBU 1402 may be composed of one or more boards, and multiple boards may jointly support a single access indication wireless access network (such as an LTE network), or may separately support wireless access of different access systems. Access network (such as LTE network, 5G network or other networks).
  • the BBU 1402 further includes a memory 14021 and a processor 14022.
  • the memory 14021 is configured to store necessary instructions and data.
  • the memory 14021 stores various indication information in the foregoing method embodiments.
  • the processor 145022 is configured to control the base station to perform necessary actions, for example, used to control the base station to execute the operation procedure in the foregoing method embodiment.
  • the memory 14021 and the processor 14022 may serve one or more single boards. That is, the memory and processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board
  • FIG. 15 is a schematic structural diagram of a communication device 1500.
  • the device 1500 may be configured to implement the method described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment.
  • the communication device 1500 may be a chip, a network device (such as a base station), a terminal device, or other wireless communication devices.
  • the communication device 1500 includes one or more processors 1501.
  • the processor 1501 may be a general-purpose processor or a special-purpose processor. For example, it may be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processing unit can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process software program data.
  • the communication device may include a transceiving unit for implementing input (reception) and output (transmission) of signals.
  • the communication device may be a chip, and the transceiver unit may be an input and / or output circuit of the chip, or a communication interface.
  • the chip may be used in a terminal or a base station or other network equipment.
  • the communication device may be a terminal or a base station or other network equipment
  • the transceiver unit may be a transceiver, a radio frequency chip, or the like.
  • the communication device 1500 includes one or more of the processors 1501.
  • the one or more processors 1501 may support the communication device 1500 to implement the method shown in FIG. 4 or FIG. 8 or FIG.
  • the communication device 1500 includes means for generating instruction information, and means for sending instruction information.
  • the functions of the component that generates the instruction information and the component that sends the instruction information may be implemented by one or more processors.
  • the instruction information (for example, the first instruction information and / or the second instruction information) may be generated by one or more processors, and the instruction information may be transmitted through an interface of a transceiver, or an input / output circuit, or a chip.
  • the indication information refer to related descriptions in the foregoing method embodiments.
  • the communication device 1500 includes means for receiving instruction information (for example, the first instruction information and / or the second instruction information).
  • instruction information for example, the first instruction information and / or the second instruction information.
  • the instruction information may be received through a transceiver, or an input / output circuit, or an interface of a chip, and the instruction information is parsed by one or more processors.
  • the processor 1501 may execute instructions, so that the communication device 1500 executes the method described in the foregoing method embodiment.
  • the instructions may be stored in whole or in part in the processor, such as instruction 1503, or may be stored in whole or in part in a memory 1502 coupled to the processor, such as instruction 1504, or may be jointly made by instructions 1503 and 1504
  • the communication device 1500 executes the method described in the above method embodiment.
  • the communication device 1500 may also include a circuit that can implement the functions of the first wireless device or the second wireless device in the foregoing method embodiment.
  • the communication device 1500 may include one or more memories 1502 on which instructions 1504 are stored, and the instructions may be executed on a processor, so that the communication device 1500 executes the foregoing.
  • the memory may further store data.
  • instructions and / or data may also be stored in the processor.
  • the one or more memories 1502 may store the indication information described in the above embodiments.
  • the processor and the memory may be set separately or integrated together.
  • the communication device 1500 may further include a transceiver unit 1505 and an antenna 1506.
  • the processor 1501 may be referred to as a processing unit and controls a communication device (a terminal or a base station).
  • the transceiver unit 1505 may be referred to as a transceiver, a transceiver circuit, or a transceiver, and is used to implement a transceiver function of the communication device through the antenna 1506.
  • the present application also provides a communication system including one or more network devices described above, and one or more terminal devices.
  • the processor in the embodiment of the present application may be an integrated circuit chip and has a signal processing capability.
  • each step of the foregoing method embodiment may be completed by using an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable processors. Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Programming logic devices, discrete gate or transistor logic devices, discrete hardware components Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps combined with the method disclosed in this application can be directly embodied as being executed by a hardware decoding processor, or executed and completed by using a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the foregoing method in combination with its hardware.
  • the memory in this application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrical memory Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double SDRAM double SDRAM
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • enhanced SDRAM enhanced SDRAM
  • SLDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM
  • the present application also provides a computer-readable medium on which a computer program is stored.
  • the computer program is executed by a computer, the communication method according to any one of the foregoing method embodiments is implemented.
  • the present application also provides a computer program product that implements the communication method described in any one of the above method embodiments when the computer program product is executed by a computer.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) and so on.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (DVD)
  • DVD high-density digital video disc
  • semiconductor medium for example, a solid state disk (solid state disk, SSD)
  • An embodiment of the present application further provides a processing apparatus including a processor and an interface; the processor is configured to execute the communication method according to any one of the foregoing method embodiments.
  • the processing device may be a chip, and the processor may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, etc .; when implemented by software
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory, and the memory may be integrated in the processor, may be located outside the processor, and exist independently.
  • the size of the sequence number of each step does not mean the order of execution, and should not be understood as constituting any limitation on the implementation process of the embodiment of the present application.
  • the execution order of each step should be based on Its function and internal logic are determined.
  • system and “network” are often used interchangeably herein.
  • the term “and / or” in this article is only an association relationship describing the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, can mean: A exists alone, A and B exist simultaneously, alone There are three cases of B.
  • the character "/" in this article generally indicates that the related objects are an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of units is only a logical function division.
  • multiple units or components may be combined or integrated.
  • 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 also be electrical, mechanical or other forms of connection.
  • 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, which may be located in one place, or 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 in the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • Computer-readable media includes computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a computer.
  • computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures Expected program code and any other medium that can be accessed by a computer. Also. Any connection is properly a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, radio, and microwave, then coaxial cable , Fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the media.
  • coaxial cable fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the media.
  • disks and discs include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), floppy discs and Blu-ray discs, where discs are usually magnetically copied data, and Lasers are used to duplicate the data optically.
  • CDs compact discs
  • laser discs optical discs
  • DVDs digital versatile discs
  • floppy discs floppy discs
  • Blu-ray discs where discs are usually magnetically copied data
  • Lasers are used to duplicate the data optically.
  • the above combination should also be included in the protection scope of the computer-readable medium.

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Abstract

本申请提供了一种使用免授权频段的通信方法,包括:第一无线设备在第一时间单元内接收第一指示信息,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,第二时间单元为预设的用于第二无线设备传输数据的时间单元。在上述方案中,一些无线设备被分配专属时间单元,能够增强无线设备使用免授权频段进行通信的可靠性。

Description

使用免授权频段的通信方法和通信装置
本申请要求于2018年09月11日提交中国专利局、申请号为201811057717.4、申请名称为“使用免授权频段的通信方法和通信装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,尤其涉及一种使用免授权频段的通信方法和通信装置。
背景技术
在第五代(the 5 th generation,5G)移动通信系统中,支持无线设备在免授权频段(unlicensed band)内进行通信。在此方式下,需要多个不同无线设备下共享使用相同的频域资源。
在此系统中,不同的无线设备需要按照规则占用共享的频域资源,例如,以10毫秒(ms)为一个接入周期,无线设备A需要在该接入周期前检测信道占用情况,即,进行空闲信道评估(clear channel assessment,CCA),如果无线设备A在进行CCA时,在信道上检测到无线信号或者检测到较强的无线信号能量,则无线设备A确认当前接入周期内检测的信道无法使用,或者,检测的信道被其它无线设备占用,无线设备A不再在该接入周期内发送信息,或者不作为初始设备(initiating device)在该接入周期内发送信息,以免对其它无线设备在接入周期内发送的信息造成干扰;若无线设备A在进行CCA时,未在信道上检测到无线信号或者检测到较强的无线信号能量,则无线设备A可以发送信号,以避免其它无线设备将该接入周期作为其初始设备的接入周期,并在所述接入周期时域起始位置上发送信息。
然而,不同无线设备进行CCA的时域位置是各自无线设备独立确定的,因此,不同无线设备可能在同一个时间单元内同时进行CCA,例如,无线设备A和无线设备B在同一个时域符号内进行CCA,均未在信道上检测到无线信号或者检测到较强的无线信号能量,则该两个无线设备均认为自己为下个接入周期的初始设备,并在下个接入周期相同的时域起始位置上同时发送数据信息,从而导致无线设备A和无线设备B发送的信息互相干扰,导致网络整体的传输性能下降。
发明内容
本申请提供了一种使用免授权频段的通信方法和通信装置,能够增强无线设备使用免授权频段进行通信的可靠性。
第一方面,提供了一种使用免授权频段的通信方法,包括:第一无线设备在第一时间单元内接收第一指示信息,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,第二时间 单元为预设的用于第二无线设备传输数据的时间单元。
在上述方案中,一些无线设备(例如,第二无线设备)被分配专属时间单元,保证了所述无线设备的传输可靠性,避免了背景技术中所述的问题。不同无线设备的专属时间单元在时域上不重叠,或者,部分重叠,或者,完全重叠。不同无线设备专属时间单元在时域资源的关系与不同无线设备间的干扰有关。若不同无线设备间信道或信号的干扰小,则不同无线设备的专属时间单元在时域上可以部分重叠或完全重叠。若不同无线设备间信道或信号的干扰大,则不同无线设备的专属时间单元在时域上不重叠。
可选地,所述方法还包括:第一无线设备在第三时间单元内进行信道检测和/或CCA,其中,第一指示信息指示第二无线设备不在第二时间单元内传输数据,第三时间单元的时域位置在第一时间单元的时域位置之后,且,第三时间单元的时域位置在第二时间单元的时域位置之前。
当第二无线设备不在第二时间单元内传输数据时,第一无线设备可以选择在第二时间单元之前进行信道检测和/或CCA,以竞争第二时间单元的使用权,从而可以提高免授权频段的资源利用率。
可选地,第一指示信息指示所述第二无线设备不在第二时间单元内传输数据,所述方法还包括:第一无线设备在第四时间单元内接收或检测第二指示信息,第二指示信息用于指示第一无线设备是否可在第二时间单元内传输数据,第四时间单元的时域位置在第二时间单元的时域位置之前,且,第四时间单元的时域位置在第一时间单元的时域位置之后。
第一无线设备还可以在确定第二无线设备不使用第二时间单元后检测第二指示信息,以确定自己是否可使用第二时间单元。
可选地,所述方法还包括:第一无线设备在第五时间单元内进行信道检测和/或CCA,其中,第五时间单元的时域位置在第二时间单元的时域位置之前,且,第五时间单元的时域位置在第四时间单元的时域位置之后。
第一无线设备在确定自己可以使用第二时间单元后,可以在第五时间单元内进行信道检测和/或CCA,以确定第二时间单元的信道使用情况。
可选地,第二指示信息包括第一无线设备的标识,和/或,第二指示信息包括第一无线设备所属无线设备组的组标识,或者,
第二指示信息不包括第一无线设备的标识,和/或,第二指示信息不包括第一无线设备所属无线设备组的组标识。
第一无线设备可以根据第二指示信息中是否携带第一无线设备的标识确定第一无线设备能否使用第二时间单元,和/或,第一无线设备可以根据第二指示信息中是否携带第一无线设备所属无线设备组的组标识确定第一无线设备能否使用第二时间单元。从而可以避免多个互相干扰的无线设备同时竞争获得第二时间单元。
第二方面,本申请还提供了一种使用免授权频段的通信方法,包括:第二无线设备获取第一指示信息,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,第二时间单元为预设的用于第二无线设备传输数据的时间单元;第二无线设备在第一时间单元内发送第一指示信息。
在上述方案中,一些无线设备(例如,第二无线设备)被分配专属时间单元,保证了 所述无线设备的传输可靠性,避免了背景技术中所述的问题。不同无线设备的专属时间单元在时域上不重叠,或者,部分重叠,或者,完全重叠。不同无线设备专属时间单元在时域资源的关系与不同无线设备间的干扰有关。若不同无线设备间信道或信号的干扰小,则不同无线设备的专属时间单元在时域上可以部分重叠或完全重叠。若不同无线设备间信道或信号的干扰大,则不同无线设备的专属时间单元在时域上不重叠。
可选地,第一指示信息指示所述第二无线设备不在第二时间单元内传输数据,所述方法还包括:第二无线设备在第四时间单元内发送第二指示信息,第二指示信息用于指示在第二时间单元内传输数据的无线设备,第四时间单元的时域位置在第二时间单元的时域位置之前,且,第四时间单元的时域位置在第一时间单元的时域位置之后。
当第二无线设备不在第二时间单元内传输数据时,第二无线设备可以发送第二指示信息,指示可以使用第二时间单元的无线设备,以避免多个相互干扰的无线设备同时竞争成功,从而可以提高免授权频段的资源利用率。上述第二指示信息所指示的无线设备也可以是有紧急数据待传输的无线设备。
可选地,第二指示信息包括所述无线设备的标识,和/或,第二指示信息包括所述无线设备所属无线设备组的组标识。
可选地,第一指示信息指示第二无线设备在第二时间单元内传输数据,所述方法还包括:第二无线设备在第六时间单元内进行信道检测和/或CCA,其中,第六时间单元的时域位置在第二时间单元的时域位置之前,且,第六时间单元的时域位置在第四时间单元的时域位置之后。
第二无线设备确定在第二时间单元内传输数据后,可以在第二时间单元之前进行信道检测和/或CCA,以确定第二时间单元的信道使用情况。
可选地,所述方法还包括:第二无线设备确定第二时间单元。
可选地,第二无线设备确定第二时间单元,包括:第二无线设备根据预设规则确定第二时间单元;或者,第二无线设备获取高层信令,高层信令用于指示第二时间单元;第二无线设备根据高层信令确定第二时间单元。
第三方面,本申请还提供了一种使用免授权频段的通信方法,包括:第一无线设备在第一时间单元内检测第一指示信息,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,其中,第二时间单元为预设的用于第二无线设备传输数据的时间单元,第一时间单元的时域位置在第二时间单元的时域位置之前。
在上述方案中,一些无线设备(例如,第二无线设备)被分配了专属时间单元,保证了所述无线设备的传输可靠性,避免了背景技术中所述的问题。不同无线设备的专属时间单元在时域上不重叠,或者,部分重叠,或者,完全重叠。不同无线设备专属时间单元在时域资源的关系与不同无线设备间的干扰有关。若不同无线设备间信道或信号的干扰小,则不同无线设备的专属时间单元在时域上可以部分重叠或完全重叠。若不同无线设备间信道或信号的干扰大,则不同无线设备的专属时间单元在时域上不重叠。
可选地,所述方法还包括:第一无线设备在第三时间单元内进行信道检测和/或CCA,其中,第一无线设备在第一时间单元内检测到第一指示信息;或者,
第一无线设备不在第三时间单元内进行信道检测和/或CCA,其中,第一无线设备在 第一时间单元内未检测到第一指示信息;
其中,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,第三时间单元的时域位置在第一时间单元的时域位置之后,且,第三时间单元的时域位置在第二时间单元的时域位置之前。
当第二无线设备不在第二时间单元内传输数据时,第一无线设备可以选择在第二时间单元之前进行信道检测和/或CCA,以竞争第二时间单元的使用权,从而可以提高免授权频段的资源利用率。
可选地,所述方法还包括:第一无线设备在第三时间单元内进行信道检测和/或CCA,其中,第一无线设备在第一时间单元内未检测到所述第一指示信息;或者,
第一无线设备不在第三时间单元内进行信道检测和/或CCA,其中,第一无线设备在第一时间单元内检测到第一指示信息;
其中,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,第三时间单元的时域位置在第一时间单元的时域位置之后,且,第三时间单元的时域位置在第二时间单元的时域位置之前。
当第二无线设备不在第二时间单元内传输数据时,第一无线设备可以选择在第二时间单元之前进行信道检测和/或CCA,以竞争第二时间单元的使用权,从而可以提高免授权频段的资源利用率。
可选地,第一无线设备确定第二无线设备不在第二时间单元内传输数据,所述方法还包括:第一无线设备在第四时间单元内接收或检测第二指示信息,第二指示信息用于指示第一无线设备是否可在第二时间单元内传输数据,第四时间单元的时域位置在第二时间单元的时域位置之前,且,第四时间单元的时域位置在第一时间单元的时域位置之后。
第一无线设备还可以在确定第二无线设备不使用第二时间单元后检测第二指示信息,以确定自己是否可使用第二时间单元。
可选地,所述方法还包括:第一无线设备在第五时间单元内进行信道检测和/或CCA,其中,第五时间单元的时域位置在第二时间单元的时域位置之前,且,第五时间单元的时域位置在第四时间单元的时域位置之后。
第一无线设备在确定自己可以使用第二时间单元后,可以在第五时间单元内进行信道检测和/或CCA,以确定第二时间单元的信道使用情况。
可选地,第二指示信息包括第一无线设备的标识,和/或,第二指示信息包括第一无线设备所属无线设备组的组标识,或者,
第二指示信息不包括第一无线设备的标识,和/或,第二指示信息不包括第一无线设备所属无线设备组的组标识。
第一无线设备可以根据第二指示信息中是否携带第一无线设备的标识确定第一无线设备能否使用第二时间单元,和/或,第一无线设备可以根据第二指示信息中是否携带第一无线设备所属无线设备组的组标识确定第一无线设备能否使用第二时间单元。从而可以避免多个相互干扰的无线设备间同时竞争获得第二时间单元。
第四方面,本申请提供了一种使用免授权频段的装置,该装置可以实现上述第一方面所涉及的方法中各个步骤所对应的功能,所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中,该装置包括处理器,该处理器被配置为支持该装置执行上述第一方面所涉及的方法中相应的功能。该装置还可以包括存储器,该存储器用于与处理器耦合,其保存该装置必要的程序指令和数据。可选地,该装置还包括收发器,该收发器用于支持该装置与其它网元之间的通信。
第五方面,本申请提供了一种使用免授权频段的装置,该装置可以实现上述第二方面所涉及的方法中各个步骤所对应的功能,所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中,该装置包括处理器,该处理器被配置为支持该装置执行上述第二方面所涉及的方法中相应的功能。该装置还可以包括存储器,该存储器用于与处理器耦合,其保存该装置必要的程序指令和数据。可选地,该装置还包括收发器,该收发器用于支持该装置与其它网元之间的通信。
第六方面,本申请提供了一种使用免授权频段的装置,该装置可以实现上述第三方面所涉及的方法中各个步骤所对应的功能,所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中,该装置包括处理器,该处理器被配置为支持该装置执行上述第三方面所涉及的方法中相应的功能。该装置还可以包括存储器,该存储器用于与处理器耦合,其保存该装置必要的程序指令和数据。可选地,该装置还包括收发器,该收发器用于支持该装置与其它网元之间的通信。
第七方面,本申请提供了一种计算机程序产品,所述计算机程序产品包括:计算机程序代码,当所述计算机程序代码被无线设备的通信单元、处理单元或收发器、处理器运行时,使得无线设备执行第一方面所述的方法。
第八方面,本申请提供了一种计算机程序产品,所述计算机程序产品包括:计算机程序代码,当所述计算机程序代码被无线设备的通信单元、处理单元或收发器、处理器运行时,使得无线设备执行第二方面所述的方法。
第九方面,本申请提供了一种计算机程序产品,所述计算机程序产品包括:计算机程序代码,当所述计算机程序代码被无线设备的通信单元、处理单元或收发器、处理器运行时,使得无线设备执行第三方面所述的方法。
第十方面,本申请提供了一种计算机存储介质,用于储存为上述无线设备所用的计算机软件指令,其包含用于执行第一方面的方法所设计的程序。
第十一方面,本申请提供了一种计算机存储介质,用于储存为上述无线设备所用的计算机软件指令,其包含用于执行第二方面的方法所设计的程序。
第十二方面,本申请提供了一种计算机存储介质,用于储存为上述无线设备所用的计算机软件指令,其包含用于执行第三方面的方法所设计的程序。
附图说明
图1是一种适用本申请的通信系统;
图2是本申请提供的一种FBE接入方式下的时域资源划分示意图;
图3是本申请提供的另一种FBE接入方式下的时域资源划分示意图;
图4是本申请提供的一种使用免授权频段的通信方法的示意图;
图5是本申请提供的一种第一时间单元和第二时间单元的时域位置示意图;
图6是本申请提供的一种第三时间单元的时域位置示意图;
图7是本申请提供的另一种使用免授权频段的通信方法的示意图;
图8是本申请提供的再一种使用免授权频段的通信方法的示意图;
图9是本申请提供的一种第二无线设备竞争第二时间单元的使用权的示意图;
图10是本申请提供的一种确定候选专属时间单元的方法的示意图;
图11是本申请提供的另一种确定候选专属时间单元的方法的示意图;
图12是本申请提供的再一种使用免授权频段的通信方法的示意图;
图13是本申请提供的一种第一无线设备或第二无线设备的结构示意图;
图14是本申请提供的另一种第一无线设备或第二无线设备的结构示意图;
图15是本申请提供的一种通信装置的结构示意图。
具体实施方式
下面将结合附图,对本申请中的技术方案进行描述。
图1示出了一种适用本申请的通信系统。该通信系统包括无线设备A和无线设备B,无线设备A与无线设备B通过无线网络(例如,5G网络)进行通信,以无线设备A为例,当无线设备A发送信息时,无线设备A的无线通信模块可获取要通过信道发送至网络设备的信息比特,这些信息比特例如是无线设备A的处理模块生成的、从其它设备接收的或者在终端设备的存储模块中保存的信息比特。
上述无线设备A和无线设备B可以是终端设备,也可以是网络设备。
在本申请中,终端设备可称为接入终端、用户设备(user equipment,UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及5G通信系统中的用户设备。
网络设备可以是码分多址(code division multiple access,CDMA)系统中的基站(base transceiver station,BTS),也可以是宽带码分多址(wideband code division multiple access,WCDMA)系统中的基站(node B,NB),还可以是长期演进(long term evolution,LTE)系统中的演进型基站(evolutional node B,eNB),还可以是5G通信系统中的基站(gNB),上述基站仅是举例说明,网络设备还可以为中继站、接入点、车载设备、可穿戴设备以及其它类型的设备。
上述适用本申请的通信系统仅是举例说明,适用本申请的通信系统不限于此,例如,通信系统中包括的网络设备和终端设备的数量还可以是其它的数量。
为了便于理解本申请的技术方案,首先对本申请涉及的概念做简要介绍,以5G系统为例说明如下。
无线设备在使用免授权频段(也可称为“免许可频段”)时需要满足一定条件。例如,对于基于帧的设备(frame based equipment,FBE)的接入方式,无线设备在帧的时域起始位置上开始发送数据信息。其中,每个帧具有给定的时长,所述给定的时长称为帧长(fixed frame period)。在每个帧内,包含无数据传输的部分,称为空闲期(idle period)。在每 个帧内,除空闲期外的时间称为信道占用时间(channel occupancy time,COT),无线设备仅在每个帧内的COT部分进行数据信息的发送和/或接收。一种对FBE接入方式下的时域资源的划分如图2所示。在图2中,帧的时域结构在时域上不断重复。每一个帧长内包括时域连续的(或,时域不连续的)COT和时域连续的(或,时域不连续的)空闲期。本申请以一个帧包括一个时域连续的COT以及一个或多个时域连续的空闲期为例进行说明。一个帧内,COT在时域上可早于空闲期,或者,COT在时域上可晚于空闲期。在本申请中,若未做特殊说明,一个帧内COT与空闲期的先后顺序不做限定。可选地,所述帧长可变。例如,帧长可半静态改变,作为一个示例,帧长可以从10ms变为20ms,且每200ms内可变化一次。可选地,所述帧内的COT时长和/或空闲期时长也可变化。例如,帧内COT时长和/或空闲期时长,根据帧长的取值确定。作为一个示例,帧长从10ms变为20ms,空闲期可从0.5ms变为1ms,或者COT可从9.5ms变为19ms。
可选地,无线设备在帧的起始时域位置(也可简称为“起始位置”)上开始发送数据信息。例如,若在空闲期内存在待传输的数据,则所述数据业务在时域上最早可传输的时域位置为COT的起始时域位置,所述COT的起始时域位置可以与所述空闲期在时域上相邻。所述时域相邻的一种定义为:所述空闲期的终止时域位置(也可简称为“终止位置”或“结束位置”)为所述COT的起始时域位置。
一般情况下,无线设备在一个帧长内的COT内发送数据信息前,在所述COT起始时域位置前对信道的占用情况进行检测或感知(sensing)。在本文中,无线设备对信道的检测和无线设备对信道的感知可替换使用。可选地,用于所述信道检测或感知的时间单元的终止时域位置为所述COT的起始时域位置。若未检测到信道被占用,则无线设备在COT的起始时刻发送数据信息,否则无线设备不在该COT起始时刻发送数据信息。由于系统中存在多个无线设备,且接入系统所采用的机制相对独立,因此,当多个无线设备检测信道的时域位置相同时,导致该多个无线设备中每一个无线设备无法有效检测到其他无线设备的存在。或者,当多个无线设备检测信道的时域位置不同时,也可能导致该多个无线设备中的部分无线设备无法进行无线接入。
例如,两个无线设备的帧结构完全相同,且在时域上完全同步,如图2所示,所述两个无线设备的信道检测时间单元均位于帧1内空闲期的终止时域位置,则所述两个无线设备中的任意一个无线设备均无法检测到另外一个无线设备的存在,从而导致该两个无线设备发送信息时相互干扰。
再例如,两个无线设备(无线设备A和无线设备B)的帧结构相同,如图3所示,但该两个无线设备的帧结构在时域上存在偏移。即,无线设备A的信道检测时间单元位于帧1的空闲期的终止时域位置,无线设备B的信道检测时间单元也位于帧1的空闲期的终止时域位置。但由于无线设备A和无线设备B的帧边界在时域上存偏移,因此,无线设备A检测到当前没有其它设备占用帧2的COT,无线设备A发送占用帧2的信号。无线设备B的信道检测时间单元的时域位置晚于无线设备A的信道检测时间单元的时域位置。因此,无线设备B在信道检测时间单元内能够检测到无线设备A发送的信号,进而无线设备B不在帧2的COT内收发数据。在无线设备A有大量数据需要传输,或者无线设备A需要长时间传输数据的场景下,由于无线设备A的信道检测时间单元总早于无线设备B的信道检测的时间单元,因此,无线设备B总能检测到无线设备A发送的信号,从而使 得无线设备A的数据发送阻塞无线设备B的信道接入,无线设备B无法发送数据。
本申请提供了一种使用免授权频段的通信方法,使得无线设备能够通过如下信令(和/或信号)的一种或多种确定可用的COT:物理层信令、物理层参考信号和高层信令。
所述物理层信令包括如下信令的一种或多种:物理控制信道信令、物理广播信道信令。
物理层参考信号可以为如下参考信号的一种或多种:同步信号(synchronization reference signal)、解调参考信号(demodulation reference signal,DMRS)、相位跟踪参考信号(phase-tracking reference signal,PT-RS)、时频跟踪参考信号(tracking reference signal,T-RS)和信道测量参考信号(channel state information-reference signal,CSI-RS)。
其中,所述解调参考信号可以是如下解调参考信号中的一种或多种:所述物理控制信道解调参考信号、广播信道解调参考信号以及物理共享信道解调参考信号。
其中,所述同步信号包括主同步信号和/或辅同步信号。
其中,所述高层信令包括如下信令的一种或多种:系统广播信息,UE专属RRC信令。
另一方面,一个无线设备配置有(或预分配或预设置)专属COT,或专属帧。其中,所述专属帧内的COT为所述无线设备的专属COT。专属帧与专属COT表示相同概念,在下文中,可替换使用。
这样,可以保证通信网络中的一个或多个无线设备在无法占用检测到空闲的COT时,至少可在各自专属COT内传输数据,保证了数据传输的可靠性。例如,针对上文中一个无线设备被另一个无线设备一直阻塞的情况,配置专属COT可以避免或减少某个无线设备被长时间阻塞时,该无线设备的数据业务无法传输的问题。可选地,所述无线设备在其专属COT的起始时域位置前无需对信道占用情况进行检测或感知。这样可避免由于检测或感知到其它无线设备发送的信号导致所述无线设备无法在其专属COT内进行数据传输的情况,确保数据传输的可靠性。可选地,所述无线设备在非其专属COT的起始时域位置前需对信道占用情况进行检测或感知。
若无线设备确定使用其专属COT,则在该COT之前发送指示信息,指示所述COT是否被占用(或,是否将被占用。或,是否是专属的。或,是否可共享)。
或者,若无线设备确定使用其专属COT,则在该COT之前不发送指示信息。其中,所述指示信息用于指示所述专属COT不被所述无线设备占用。
或者,若无线设备确定不使用其专属COT,则在该COT之前发送指示信息,指示该COT可以被其它无线设备使用。
或者,若无线设备确定不使用其专属COT,则在该COT之前不发送指示信息。其中,所述指示信息用于指示所述专属的COT被所述无线设备占用。
当其它无线设备确定上述COT能够使用,则进行CCA或者信道检测。若其它无线设备确定上述COT被占用,则不再进行CCA以及信道检测。进而避免了由于检测时域位置相同导致的频谱资源浪费,并且保证了在频谱共享时无线设备数据传输的可靠性。即,不会由于一个无线设备过度使用频谱资源导致其它无线设备无法使用频谱资源的情况。此外,由于相互干扰的无线设备不会同时竞争成功,上述方案还能够提高资源利用率,保证数据传输的可靠性,改善频域资源共享的效率。
如图4所示,方法400包括:
S410,第一无线设备在第一时间单元内接收第一指示信息。第一指示信息用于指示第 二时间单元用于第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二时间单元不用于第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二时间单元是否用于第二无线设备在第二时间单元内传输数据,其中,第二时间单元为预设的第二无线设备的专属时间单元,第一时间单元的时域位置在所述第二时间单元的时域位置之前。在本申请中,传输数据指的是发送数据和/或接收数据。
第一指示信息还可以被理解为如下所示的含义:第一指示信息用于指示第二时间单元可用于第一无线设备在第二时间单元内传输数据。或者,第一指示信息用于指示第二时间单元不可用于第一无线设备在第二时间单元内传输数据。或者,第一指示信息用于指示第二时间单元是否可用于第一无线设备在第二时间单元内传输数据。或者,第一指示信息用于指示第二时间单元为可共享的时间单元。或者,第一指示信息用于指示第二时间单元为不可共享的时间单元。或者,第一指示信息用于第二时间单元是否为可共享的时间单元。
一个时间单元被称为可被共享的时间单元,表示多个无线设备可根据规则(例如,竞争接入机制)占用所述时间单元内的时域和/或频域资源。例如,无线设备通过CCA确定信道状态是否空闲。若无线设备认为信道空闲,则该无线设备发送信号(例如,物理层信令、物理层参考信号和高层信令中的一个或多个),该信号表示上述可被共享的时间单元被占用。若无线设备确定信道被占用或信道忙碌,则放弃占用所述可共享的时间单元。
第一时间单元可以是第二时间单元之前的一个或多个时隙、时域符号或子帧。第二时间单元可以是COT,也可以是时域符号、时隙、子帧等。上述第一时间单元和第二时间单元的定义仅是举例说明,本申请对第一时间单元和第二时间单元的具体形式不作限定。
第二时间单元可以是一个或多个时隙,或者是一个无线帧。时隙是一个时间单位,在时域上包含连续的14个或12个正交频分复用(orthogonal frequency division multiplexing,OFDM)符号。在不同子载波宽度下,一个时隙的时间长度随着子载波宽度的增大而减小。无线帧是一个时间单位,在时域上的长度为20毫秒。一个无线帧包括多个时隙,不同子载波宽度下包括的时隙数量不同。例如,15kHz子载波宽度下,一个无线帧包括10个时隙。30kHz子载波宽度下,一个无线帧包括20个时隙。60kHz子载波宽度下,一个无线帧包括40个时隙。120kHz子载波宽度下,一个无线帧包括80个时隙。240kHz子载波宽度下,一个无线帧包括160个时隙。
可选地,所述第一时间单元的起始时域位置可位于空闲期起始时域位置。图5示出了本申请提供的一种第一时间单元和第二时间单元的时域位置示意图。图5所示的时域资源被划分为两个时隙。即,第一时隙和第二时隙。每个时隙被划分为14个OFDM符号。第一时间单元为第一时隙内OFDM编号为0和1的OFDM符号,第二时间单元的起始时隙为第二时隙,其中,第一时隙的时隙编号为n,第二时隙的时隙编号为n+1。若第二时间单元为一个无线帧,则根据子载波宽度的不同,第二时间单元可以包含10、20、40、80或者160个时隙,或者第二时间单元可以包含9、19、39、79或者159个时隙。
可选地,所述第一时间单元的终止时域位置位于空闲期的起始时域位置。
例如,第一时间单元为第一时隙内OFDM编号为12和13的OFDM符号,第二时间单元的起始时隙为第二时隙,其中,第一时隙的时隙编号为n,第二时隙的时隙编号为n+2。若第二时间单元为一个无线帧,则根据子载波宽度的不同,第二时间单元可以包含10、20、40、80或者160个时隙,或者第二时间单元可以包含9、19、39、79或者159个时 隙。
方法400中,第一指示信息可以有不同的表现形式。
在一种可选的实施方案中,第一指示信息可以承载在下行控制信息(downlink control information,DCI)中,所述下行控制信息在公共搜索空间内。其中,第一指示信息可以承载于DCI的字段中。第一指示信息指示的内容可以通过DCI中的字段取不同的值来表示。例如,若DCI中字段的取值为第一值(如1),则第一指示信息指示:第二时间单元不用于第二无线设备进行传输数据,或者,第二时间单元可用于第一无线设备传输数据,或者,第二时间单元为可共享的时间单元。若DCI中第一指示信息取值为第二值(如0),则第一指示信息指示:第二时间单元用于第二无线设备传输数据,或者,第二时间单元不可用于第一无线设备传输数据,或者,第二时间单元为不可共享的时间单元。
在另一种可选的实施方案中,第一指示信息承载于参考信号序列中。例如,当第二无线设备发送第一参考信号时,该第一参考信号携带的第一指示信息指示第二时间单元为不可共享的时间单元。或者,当第二无线设备发送第二参考信号,该第二参考信号携带的第一指示信息指示第二时间单元为可共享的时间单元。
根据第一指示信息指示的内容,第一无线设备有不同的处理方式。即,第一无线设备可以执行下述步骤420或者步骤430。步骤420和步骤430均为可选的步骤。
步骤420,第一无线设备在第三时间单元内进行信道检测和/或CCA。其中,第一指示信息指示:第二时间单元不用于第二无线设备传输数据,或者,第二时间单元可用于第一无线设备传输数据,或者,第二时间单元为可共享的时间单元。第三时间单元的起始时域位置在第一时间单元的时域位置之后,且,第三时间单元的起始时域位置在第二时间单元的时域位置之前。
第三时间单元可以是时隙、OFDM符号或子帧,还可以是其它的时间单元,本申请对第三时间单元的具体形式不作限定。
第一无线设备可以通过以下两种方式确定第三时间单元。
方式一。
第一无线设备可以在多个时间单元中随机确定第三时间单元。其中,在一个时隙内包括多个可用于信道检测和/或CCA的时间单元,所述多个时间单元在时域上不重叠,或者,所述多个时间单元的OFDM符号序号不同。图6示出了本申请提供的一种第三时间单元的时域位置示意图。图6所示的时域资源被划分为两个时隙。即,第一时隙和第二时隙。每个时隙被划分为14个OFDM符号。可用于信道检测和/或CCA的时间单元的时域长度为1个OFDM符号,在一个时隙内,OFDM符号编号为7,8,9,10,11,12以及13的时间单元中的任意一个均可作为用于信道检测和/或CCA的时间单元。不同的无线设备确定的用于信道检测和/或CCA的时间单元不同。第一无线设备确定的第三时间单元可以为第一时隙内OFDM符号编号为9的时间单元。
方式二。
多个用于信道检测和/或CCA的时间单元可由高层信令配置,或者是预定义的,或者,与帧长存在对应关系。即,第一无线设备可以根据帧长确定多个用于信道检测和/或CCA的时间单元。
例如,高层信令包括帧长的配置信息,第一无线设备获取高层信令中帧长的配置信息。 若帧长为10毫秒,则所述多个用于信道检测和/或CCA的时间单元的时域长度可以为0.5毫秒。若帧长为5毫秒,则多个用于信道检测和/或CCA的时间单元的时域长度可以为0.25毫秒。所述多个用于信道检测和/或CCA的时间单元可以是一个或多个时间单元。其中,该多个时间单元的时间粒度可以是预设的时间粒度,本申请对该时间粒度的大小不进行限定。例如,上述多个时间单元可以是一个帧中的多个OFDM符号,或者,多个时隙。
可选地,第三时间单元与第一时间单元可以位于同一个时隙内或不同的时隙内。
在一种可选的实施方案中,第一无线设备与第二无线设备所在的通信系统中还存在第三无线设备。第三无线设备获取第一指示信息,根据该第一指示信息确定:第二时间单元不用于第二无线设备进行传输数据,或者,第二时间单元可用于第三无线设备进行传输数据的指示信息,或者,第一指示信息用于第二时间单元为可共享的时间单元。第三无线设备在多个可用于信道检测和/或CCA的时间单元中确定第七时间单元。例如,如图6所示,第三无线设备在第一时间单元获取第一指示信息,确定第二时间单元可被共享,则第三无线设备可以确定第一时隙内的OFDM符号编号为11的OFDM符号为第七时间单元。其中,第七时间单元用于第三无线设备进行信道检测和/或CCA。
可选地,无线设备可以根据数据传输优先级的大小确定用于信道检测和/或CCA的时间单元的时域位置。若第一无线设备的数据传输优先级高于第三无线设备的数据传输优先级,则第一无线设备进行信道检测和/或CCA的时间单元(即,第三时间单元)在时域位置上早于第三无线设备进行信道检测和/或CCA的时间单元(即,第七时间单元)。如图5所示,第一无线设备的数据传输优先级高于第二无线设备的数据传输优先级,则第一无线设备进行信道检测和/或CCA的时间单元为第一时隙内OFDM符号编号为9的OFDM符号,第三无线设备进行信道检测和/或CCA的时间单元为第一时隙内OFDM符号编号为11的OFDM符号,且OFDM符号编号为9的OFDM符号在时域上早于OFDM符号编号为11的OFDM符号。所述数据传输的优先级可以根据数据传输的参数确定,其中,数据传出的参数包括如下参数中的一种或多种:数据传输占用的时域符号数量,下行数据传输结束到上行应答信息(例如,肯定应答(ACK)或否定应答信息(NACK))传输的时域间隔,或者,业务的延时大小。
例如,数据传输占用的时域符号数量越少,优先级越高,反之优先级越小。或者,下行数据传输结束时刻到上行应答信息发送起始时刻的时域间隔越小,优先级越高,反之优先级越小。或者,业务的时延要求越小,优先级越高,反之优先级越小。
上文详细描述了第一指示信息指示第一无线设备可以在第二时间单元内传输数据的实施例,在该实施例中,无线设备被分配专属时间单元,保证了所述无线设备的传输可靠性,避免了背景技术中所述的问题。不同无线设备的专属时间单元在时域上不重叠,或者,部分重叠,或者,完全重叠。不同无线设备专属时间单元在时域资源的关系与所述无线设备间的干扰有关。若不同无线设备间信道或信号的干扰小,则所述不同无线设备的专属时间单元在时域上可以部分重叠或完全重叠。若不同无线设备间信道或信号的干扰大,则所述不同无线设备的专属时间单元在时域上不重叠。
在一些情况下,例如,第二无线设备当前的无线通信环境较好。或者,第二无线设备当前待传输的数据的优先级较低。或者,第一无线设备有紧急数据需要传输。第二无线设备可以指示第二时间单元可被其它无线设备(例如,第一无线设备)使用。或者,第二无 线设备指示第二时间单元可用于共享。从而提高了免许可频域资源的利用率。第二无线设备可以发送携带无线设备标识或者无线设备组标识的指示信息。相应地,当第一无线设备接收到包含第一无线设备的标识的上述指示信息时,确定第一无线设备可以使用第二时间单元。当第一无线设备接收到不包含第一无线设备的标识的上述指示信息时,确定第一无线设备不可以使用第二时间单元。
若第一指示信息指示第一无线设备不能使用第二时间单元传输数据,则第一无线设备需要执行步骤430。
步骤430,第一无线设备在第二时间单元前不进行信道检测和/或CCA,其中,第一指示信息用于指示:第二时间单元用于第二无线设备传输数据,或者,第二时间单元不可用于第一无线设备传输数据,或者,第二时间单元为不可共享的时间单元。
若第一指示信息指的是步骤430中所述的内容,则第一无线设备无需进在第二时间单元的起始时域位置前进行信道检测和/或CCA。在此方案中,第一无线设备可减少信道检测和/或CCA的频率,节省第一无线设备的能量消耗。此外,对于第二无线设备,其通过指示第二时间单元不可用于共享,使得第二时间单元为第二无线设备专属的时间单元。在第二时间单元上由于无其它无线设备存在,则第二无线设备受到的干扰大小进一步降低,提高了第二无线设备数据传输的频谱效率。而且,第二无线设备的数据传输可靠性也可进一步提高,因为系统中存在多个预定义的资源可作为第二无线设备专属的时间单元。
在一些情况下,第二无线设备可以发送第二指示信息。该第二指示信息用于指示第二时间单元不可以被共享。例如,第二无线设备关联的终端设备有紧急数据需要传输,并且,第二无线设备已经发送了指示第二时间单元可共享的第一指示信息,则第二无线设备可以发送上述第二指示信息。
在上述方案中,第一无线设备接收到第一指示信息后,可以根据第一指示信息确定:第二时间单元不用于第二无线设备进行传输数据,或者,第二时间单元为可共享的时间单元。随后,第一无线设备在第四时间单元接收或检测第二指示信息。第二指示信息用于指示:第二时间单元用于第二无线设备传输数据,或者,第二时间单元为不可共享的时间单元。其中,第四时间单元的终止时域位置在第二时间单元的终止时域位置之前。可选地,第四时间单元的终止时域位置为在第二时间单元起始时域位置。
在另一些情况下,第二无线设备可以发送第二指示信息。该第二指示信息用于指示第二时间单元可以被共享。例如,第二无线设备已经发送了指示第二时间单元不可被共享的第一指示信息,但第二无线设备确定不再进行数据传输,则第二无线设备可以发送上述第二指示信息。
在上述方案中,第一无线设备接收到第一指示信息后,可以根据第一指示信息确定:第二时间单元用于第二无线设备进行传输数据,或者,第二时间单元为可不共享的时间单元。随后,第一无线设备在第四时间单元接收或检测第二指示信息。第二指示信息用于指示:第二时间单元不用于第二无线设备传输数据,或者,第二时间单元为可共享的时间单元。其中,第四时间单元的终止时域位置在第二时间单元的终止时域位置之前。可选地,第四时间单元的终止时域位置为在第二时间单元起始时域位置。
作为一个可选的实施例,多个接收到第一指示信息的无线设备确定所述第二时间单元可用于共享,但所述多个无线设备仍然存在竞争冲突的可能。则第二指示信息可以指示除 第二无线设备以外所有的无线设备可以使用第二时间单元。或者,第二指示信息指示特定的无线设备可以使用第二时间单元,包括所述第二无线设备。例如,第二指示信息中包括能够使用第二时间单元的无线设备的标识,或者,第二指示信息中包括能够使用第二时间单元的无线设备的组标识。
例如,第二指示信息承载在下行控制信息中。下行控制信息中可以包括能够使用第二时间单元的无线设备的标识。第一无线设备从下行控制信息中获取到第一无线设备的标识,则第一无线设备确定可以使用第二时间单元。否则,第一无线设备确定不能使用第二时间单元。
又例如,第二指示信息可以为下行控制信息的循环冗余校验码(cyclic redundancy check,CRC)上的扰码。第一无线设备在第四时间单元盲检DCI。其中,DCI的CRC由第一无线设备的专属标识加扰。第一无线设备检测到由第一无线设备的专属标识加扰的下行控制信息,则第一无线设备确定第一无线设备可以使用第二时间单元。或者,第一无线设备未检测到由第一无线设备的专属标识加扰的下行控制信息,则第一无线设备确定第一无线设备不能使用第二时间单元。
再例如,第二指示信息由下行控制信息的扰码序列携带。例如,对下行控制信息进行信道编码和速率匹配后的比特序列可记为b(0),b(1),…,b(N-1)。生成的扰码序列可记为c(0),c(1),…。其中,生成扰码序列的初始值为c init。加扰后的比特序列记为b’(0),b’(1),…,b’(N-1)。加扰公式为b’(i)=[b(i)+c(i+γ·N)]mod 2。其中,N为速率匹配后的比特序列长度,γ为与无线设备标识有关的实数,mod表示求余数函数,i表示序号,取值为0至N-1中的一个值。再例如,生成扰码序列的初始化值由无线设备的标识确定。生成扰码序列的初始值c init为与无线设备标识相关的函数。若第一无线设备检测到下行控制信息的扰码序列的加扰公式为b’(i)=[b(i)+c(i+γ·N)]mod2,且,γ为与第一无线设备标识有关的实数,第一无线设备确定第二时间单元可以使用。若第一无线设备检测到下行控制信息的扰码序列的初始化值是根据第一无线设备的标识生成的,则第一无线设备确定第二时间单元可以使用。若第一无线设备检测到下行控制信息的扰码序列的加扰公式为b’(i)=[b(i)+c(i+γ·N)]mod2,且,γ为与第一无线设备标识无关的实数,第一无线设备确定第二时间单元不可以使用。若第一无线设备检测到下行控制信息的扰码序列的初始化值不是根据第一无线设备的标识生成的,则第一无线设备确定第二时间单元不可以使用。
再例如,第二指示信息由参考信号序列携带。参考信号序列的初始值为与无线设备ID有关的函数,根据所述初始值生成参考信号序列。例如,第一无线设备根据第一无线设备的标识生成的参考信号序列检测接收到的参考信号序列。第一无线设备检测到根据第一无线设备的标识生成的参考信号序列,则确定第一无线设备可以使用第二时间单元。或者,第一无线设备未检测到根据第一无线设备的标识生成的参考信号序列,则确定第一无线设备不可使用第二时间单元。上述参考信号序列可以是下述参考信号序列中的至少一种:下行控制信道参考信号序列,广播信道参考信号序列,上行或下行共享信道参考信号序列,信道测量参考信号序列,或时频同步参考信号序列,同步信号参考信号序列。
上述示例仅是举例说明,第二指示信息携带无线设备的标识可以为一个无线设备的标识,也可以为一组无线设备的标识,本申请对此不做限定。所述第二指示信息的指示方法同样适用于第一指示信息。
除上述第一无线设备接收第二指示信息的实施例之外,第一无线设备还可以通过是否检测到第二指示信息确定其是否能够使用第二时间单元,或者,第一无线设备还可以通过是否检测到第二指示信息确定其是否进行信道检测和/或CCA。
例如,当第一无线设备在第四时间单元内检测到第二指示信息时,第一无线设备确定接下来进行信道检测和/或CCA。当第一无线设备在第四时间单元内未检测到第二指示信息时,第一无线设备确定不再进行信道检测和/或CCA。
第一无线设备在第四时间单元内获取第二指示信息后,可以在第五时间内进行信道检测和/或CCA,以确定第二时间单元的信道忙碌情况是否满足第一无线设备的传输需求。第五时间单元位于第四时间单元之后,且,第五时间单元位于第二时间单元的终止时域位置之前。
图7是本申请提供的使用免授权频段通信方法的另一示例。其中,以第一无线设备为第一基站、第二无线设备为第二基站为例对本申请进一步进行说明。
图7所示的时域资源被划分为多个时间单元。其中,第二时间单元包括用于上行传输的部分和用于下行传输的部分。第二时间单元是用于第二基站传输数据的时间单元。第二时间单元包括多个OFDM符号,部分OFDM符号用于下行传输,部分OFDM符号用于上行传输,用于下行传输的OFDM符号与用于上行传输的OFDM符号之间的两个OFDM符号用于上下行切换。上述第二时间单元的结构仅是举例说明,第二时间单元还可以仅用于上行传输或者仅用于下行传输。
第二基站在第一时间单元内发送第一指示信息,指示第二时间单元被占用,第三时间单元例如是预设的第一基站进行CCA的时间单元,第一基站获取该第一指示信息后,不再在第三时间单元内进行CCA,等待属于第一基站的时间单元的到来。
若第二基站确定不再独享第二时间单元,则第二基站在第四时间单元发送第二指示信息,该第二指示信息指示第二时间单元可以被使用,第一基站获取第二指示信息后,若第一基站决定使用第二时间单元,则第一基站可以在第五时间单元内进行CCA,以确定第二时间单元未被其它无线设备使用。
需要说明的是,第三时间单元与第五时间单元可以是相同的时间单元,也可以是不同的时间单元,例如,若第四时间单元的时域位置在第三时间单元的时域位置之前,则第一无线设备可以直接在第三时间单元内进行CCA,即,第三时间单元与第五时间单元重合;又例如,若第四时间单元的时域位置在第三时间单元的时域位置之后,则第一无线设备无法使用第三时间单元进行CCA,第一无线设备可以在第五时间单元内进行CCA,第五时间单元可以是预设的时间单元,也可以是第一无线设备根据规则确定的时间单元。
上文描述了第一无线设备作为接收第一指示信息的设备使用免授权频段进行通信的方法,可以理解的是,第一无线设备并不总是作为接收第一指示信息的设备使用免授权频段进行通信,例如,当第一无线设备的专属时间单元来临时,第一无线设备可以发送指示信息,指示该专属时间单元被占用,其它无线设备不得使用,则第二无线设备接收到该指示信息后不再竞争该专属时间单元。第一无线设备发送指示信息的方法可以参考下述第二无线设备发送第一指示信息的示例。
如图8所示,方法800包括:
S810,第二无线设备获取第一指示信息,第一指示信息用于指示第二无线设备在第二 时间单元内传输数据,或者,第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备是否在第二时间单元内传输数据,第二时间单元为预设的所述第二无线设备专属的时间单元。
S820,第二无线设备在第一时间单元内发送第一指示信息,第一时间单元的时域位置在第二时间单元的时域位置之前。
本领域技术人员可以知晓:方法800中的“第二无线设备”、“第一指示信息”、“第一时间单元”以及“第二时间单元”可以等同于方法400中的相应的名词。此外,方法800中,第二无线设备发送第一指示信息的步骤与方法400中第一无线设备接收第一指示信息的步骤对应,为了简洁,在此不再赘述。
S810中,第一指示信息可以是第二无线设备生成的信息,也可以是第二无线设备从其它设备接收的信息,还可以是第二无线设备从存储介质中读取的信息。
第二时间单元是第二无线设备的专属时间单元,第二无线设备可以根据其是否使用第二时间单元传输数据采取不同的处理方式。
在一种可选的实施方案中,第二无线设备确定使用第二时间单元传输数据,则第二无线设备可以采取以下处理方式。
处理方式一。
第二无线设备获取并发送第一指示信息,第一指示信息用于指示第二无线设备使用第二时间单元传输数据。需要说明的是,第一指示信息可以通过多种方式指示第二无线设备使用第二时间单元传输数据。例如,第一指示信息指示第二时间单元为非共享时间单元,或者,第一指示信息指示禁止第二无线设备以外的无线设备使用第二时间单元。本申请对第一指示信息的具体形式不作限定。
第二无线设备发送了第一指示信息后即可在第二无线设备的专属时间单元(即,第二时间单元)内收发数据。这样,第二无线设备就可以在传输可靠性得到保障的时间单元内收发数据,从而提高了无线设备使用免授权频段进行通信的可靠性。
处理方式二。
第二无线设备不发送第一指示信息,第一指示信息用于指示第二无线设备不使用第二时间单元传输数据。需要说明的是,第一指示信息可以通过多种方式指示第二无线设备不使用第二时间单元传输数据。例如,第一指示信息指示第二时间单元为共享时间单元,或者,第一指示信息指示允许第二无线设备以外的无线设备使用第二时间单元。本申请对第一指示信息的具体形式不作限定。
第二无线设备以外的无线设备(例如,第一无线设备)可以在预设的时间单元(例如,第一时间单元)内检测第一指示信息,若第一无线设备未检测到第一指示信息,则第一无线设备确定第一无线设备不可使用第二时间单元。
第二无线设备确定不发送第一指示信息后即可在第二无线设备的专属时间单元(即,第二时间单元)内收发数据。这样,第二无线设备就可以在传输可靠性得到保障的时间单元内收发数据,从而提高了无线设备使用免授权频段进行通信的可靠性。
在另一种可选的实施方案中,第二无线设备确定不使用第二时间单元传输数据。例如,第二无线设备当前的无线通信环境较好,或者,第二无线设备当前待传输的数据的优先级较低,或者,第一无线设备有紧急数据需要传输,第二无线设备可以指示第二时间单元可 被其它无线设备(例如,第一无线设备)使用,从而提高了免授权传输资源的利用率以及使用免授权频段传输的灵活性。第二无线设备可以采取以下处理方式指示其它无线设备使用第二时间单元。
处理方式三。
第二无线设备获取并发送第一指示信息,第一指示信息用于指示第二无线设备不使用第二时间单元传输数据。需要说明的是,第一指示信息可以通过多种方式指示第二无线设备不使用第二时间单元传输数据。例如,第一指示信息指示第二时间单元为共享时间单元,或者,第一指示信息指示允许第二无线设备以外的无线设备使用第二时间单元。本申请对第一指示信息的具体形式不作限定。
第二无线设备以外的无线设备(例如,第一无线设备)可以在预设的时间单元(例如,第一时间单元)内检测第一指示信息,若第一无线设备检测到第一指示信息,则第一无线设备确定第一无线设备可以使用第二时间单元,第一无线设备可以选择在第三时间单元内进行信道检测和/或CCA。
处理方式四。
第二无线设备不发送第一指示信息,第一指示信息用于指示第二无线设备使用第二时间单元传输数据。需要说明的是,第一指示信息可以通过多种方式指示第二无线设备使用第二时间单元传输数据。例如,第一指示信息指示第二时间单元为非共享时间单元,或者,第一指示信息指示禁止第二无线设备以外的无线设备使用第二时间单元。本申请对第一指示信息的具体形式不作限定。
第二无线设备以外的无线设备(例如,第一无线设备)可以在预设的时间单元(例如,第一时间单元)内检测第一指示信息,若第一无线设备未检测到第一指示信息,则第一无线设备确定第一无线设备可以使用第二时间单元,第一无线设备可以选择在第三时间单元内进行信道检测和/或CCA。
在一种可选的实施方案中,当第一指示信息指示第二无线设备不使用第二时间单元传输数据时,或者,第一指示信息指示第二时间单元可被共享时,方法800还包括:
第二无线设备在第四时间单元内发送第二指示信息,第二指示信息用于指示第一无线设备不能在第二时间单元内传输数据,或者,第二指示信息用于指示第二时间单元不可被共享,第四时间单元的终止时域位置在第二时间单元的终止时域位置之前。
在一些情况下,例如,第二无线设备已经发送了指示第二时间单元可共享的第一指示信息,并且,第二无线设备有紧急数据需要传输,则第二无线设备可以发送第二指示信息,第二指示信息指示第二时间单元不可以被共享。
在另一些情况下,例如,第二无线设备已经发送了指示第二时间单元不可共享的第一指示信息,并且,第二无线设备确定不再使用第二时间单元,则第二无线设备可以发送第二指示信息,该第二指示信息用于指示第二时间单元可以被共享。
在另一种可选的实施方案中,当第一指示信息指示第二无线设备使用第二时间单元传输数据时,或者,第一指示信息指示第二时间单元不可被共享时,方法800还包括:
第二无线设备在第四时间单元内发送第二指示信息,第二指示信息用于指示第一无线设备能够在第二时间单元内传输数据,或者,第二指示信息用于指示第二时间单元可被共享,第四时间单元的终止时域位置在第二时间单元的终止时域位置之前。
方法800中的“第二指示信息”可等同于或参考方法400中的“第二指示信息”,为了简洁,在此不再赘述。
第二无线设备发送第二指示信息,说明第二无线设备将第二时间单元共享给其它无线设备,若第二无线设备还希望在第二时间单元上传输数据,则第二无线设备需要与其它无线设备(包括第一无线设备)共同竞争第二时间单元的使用权。
图9示出了第二无线设备竞争第二时间单元的使用权的示意图。
图9所示的时域资源被划分为多个时间单元。其中,第二时间单元包括用于上行传输的部分和用于下行传输的部分。其中,第二时间单元是用于第二基站(即,第二无线设备)传输数据。第二时间单元包括多个OFDM符号,部分OFDM符号用于下行传输,部分OFDM符号用于上行传输,用于下行传输的OFDM符号与用于上行传输的OFDM符号之间的两个OFDM符号用于上下行切换。上述第二时间单元的结构仅是举例说明,第二时间单元还可以仅用于上行传输或者仅用于下行传输。
第二基站在第一时间单元内发送第一指示信息,指示第二时间单元被占用。
若第二基站确定不再独享第二时间单元,则第二基站在第四时间单元发送第二指示信息,该第二指示信息指示第二时间单元可以被除第二基站以外的其它基站使用。
第二指示信息发送完成后,第二基站在第六时间单元内进行信道检测和/或CCA,第六时间单元可以是预设的时间单元,也可以是第二无线设备根据规则确定的时间单元。此外,第六时间单元可以是一个或多个时隙,也可以是一个或多个OFDM符号。本申请对第六时间单元的具体形式不作限定。
可选地,方法800还包括:
第二无线设备确定第二时间单元。
第二无线设备可以根据预设规则确定所述第二时间单元,也可以获取高层信令,并根据所述高层信令确定第二时间单元。
第二无线设备可以在获取第一指示信息之前确定第二时间单元,也可以在获取第一指示信息之后确定第二时间单元。下面以第二无线设备为第二基站为例,举出一个第二无线设备在获取第一指示信息之后确定第二时间单元的例子。
第二基站发送指示该第二基站不在第二时间单元内传输数据的第一指示信息之后,与第二基站关联的终端设备有紧急数据需要传输。则第二基站可以发送指示上述第二时间单元不可被共享的第二指示信息。即,第二基站在发送了第一指示信息之后确定第二时间单元。
在一种可选的实施方案中,第二无线设备可以从多个候选专属时间单元内确定第二时间单元。
第二无线设备可以通过高层参数获取候选专属时间单元的配置信息,或者获取专属时间单元的配置信息。所述候选专属时间单元的配置信息或专属时间单元的配置信息,包括如下信息中的一种或多种:候选专属时间单元的周期、候选专属时间单元的时域长度、候选专属时间单元在时域上的偏移量、候选专属时间单元对应的频域资源、一个周期内连续候选专属时间单元的数量。
下述配置方式同样适用于获取专属时间单元的配置信息。
第二无线设备可以根据n mod m=0确定候选专属时间单元的起始时域位置,其中,n 为一个无线帧中的时隙编号,m为预设值,mod为取模运算。
例如,在子载波间隔为15kHz的情况下,一个无线帧内的时隙从0到9进行编号,若m等于5,由于0mod 5等于0,以及,5mod 5等于0,因此,候选专属时间单元的起始时域位置为时隙0和时隙5。
又例如,在子载波间隔为15kHz的情况下,一个无线帧内的时隙从0到9进行编号,若m等于10,由于0mod 10等于0,因此,候选专属时间单元的起始时域位置为时隙0。
再例如,在子载波间隔为30kHz的情况下,一个无线帧内的时隙从0到19进行编号,若m等于5,由于0mod 5等于0,5mod 5等于0,10mod 5等于0,15mod 5等于0,因此,候选专属时间单元的起始时域位置为时隙0、时隙5、时隙10和时隙15。
第二无线设备确定了候选专属时间单元的起始时域位置之后,可以根据候选专属时间单元的时域长度、候选专属时间单元在时域上的偏移量或者一个周期内连续候选专属时间单元的数量确定候选专属时间单元的终止时域位置。
图10示出了本申请提供的一种确定候选专属时间单元的方法的示意图。图10中,一个无线帧包含10个时隙,编号分别为0至9。
第二无线设备确定候选专属时间单元的起始时域位置为时隙0,并且,第二无线设备确定候选专属时间单元的时间长度为3个时隙,则,第二无线设备确定候选专属时间单元为该无线帧中的时隙0、时隙1和时隙2。
或者,第二无线设备确定候选专属时间单元的起始时域位置为时隙0,并且,第二无线设备确定候选专属时间单元在时域上的偏移量为3个时隙,则,第二无线设备确定候选专属时间单元为该无线帧中的时隙0、时隙1和时隙2。
或者,第二无线设备确定候选专属时间单元的起始时域位置为时隙0,并且,第二无线设备确定一个周期内连续候选专属时间单元的数量为3个时隙,则,第二无线设备确定候选专属时间单元为该无线帧中的时隙0、时隙1和时隙2。
上述时隙0、时隙1和时隙2例如是方法400和方法800中所述的第二时间单元。
候选专属时间单元的周期(也可称为“接入周期”)用于指示候选专属时间单元出现的频率。例如,候选专属时间单元的时域长度为1个无线帧,候选专属时间单元的周期为2个无线帧,则两个相邻的候选专属时间单元之间间隔一个无线帧。又例如,候选专属时间单元的时域长度为1个无线帧,候选专属时间单元的周期为1个无线帧,则每两个相邻的候选专属时间单元之间在时域上没有间隔。
此外,候选专属时间单元对应的频域资源的粒度可以是物理资源块,其中,一个物理资源块在频域上包含频域连续的12个子载波。或者,候选专属时间单元对应的频域资源的粒度可以是带宽区域,即,部分带宽(bandwidth part,BWP)。例如,高层参数中的配置信息包括BWP索引0和BWP索引2,则候选专属时间单元内的频域资源为BWP索引0和BWP索引2对应的频域资源。
其中,在一个服务小区内,通信系统可以为每一个无线设备配置4个BWP。每个BWP在频域上包括连续的物理资源块,且在一个BWP内包括的物理资源块的最大值为275个。每个BWP对应一个BWP索引,即,BWP索引0,BWP索引1,BWP索引2和BWP索引3。不同的BWP索引在频域上的资源可以重叠或部分重叠,或完全不重叠。或者,每个BWP包括的频域资源以20MHz为频域粒度,即,每个BWP包括的物理资源块在频域 上满足20MHz的整数倍。例如,在15kHz下,BWP包括的RB数量为100,或者200,或者300,或者400。在30kHz下,BWP包括的RB数量为50,或者100,或者150,或者200。在60kHz下,BWP包括的RB数量为25,或者50,或者75,或者100。在120kHz下,BWP包括的RB数量为12,或者25,或者37,或者50。在240kHz下,BWP包括的RB数量为7,或者12,或者25。
可选的,第二无线设备可以根据无线设备的优先级确定第二无线设备候选专属的时间单元或专属时间单元,即,第二时间单元。
例如,第二无线设备根据第二无线设备的业务优先级确定第二无线设备的候选专属时间单元,其中,业务优先级与第二无线设备所经历的其它无线设备专属的时间单元的数量有关。若第二无线设备的初始优先级为0,在一个接入周期结束后,第二无线设备所经历的其它无线设备专属的时间单元的数量为1,则优先级为1。若第二无线设备的初始优先级为0,在一个接入周期结束后,第二无线设备所经历的其它无线设备专属的时间单元的数量为2,则优先级为2,依此类推,第二无线设备所经历的其它无线设备专属的时间单元的数量越多,第二无线设备的业务优先级越高。此外,若第二无线设备在其专属的时间单元传输数据后,则第二无线设备的业务优先级降为最低的优先级。
图11示出了本申请提供的另一种确定候选专属时间单元的方法的示意图。图11中,每个接入周期即一个无线帧,一个无线帧包含10个时隙,编号分别为0至9。
如图11所示,在第一接入周期结束后,第二无线设备所承载业务的优先级为最低优先级0,第二无线设备所承载业务的优先级为优先级1,第三无线设备所承载业务的优先级为优先级2,其中,优先级2为最高优先级;在第一接入周期结束后,第三无线设备为随后第二接入周期的专属无线设备,其中,无线设备根据所承载业务的优先级是否为最高优先级确定下一个时间单元是否为所述无线设备的专属时间单元。在第二接入周期结束后,第三无线设备承载的业务降为最低优先级,而第二无线设备和第二无线设备承载的业务优先级会增加,其中,第二无线设备承载的业务优先级为优先级1,第二无线设备承载的业务优先级为优先级2;进而,第二无线设备占用随后的第三接入周期;在第三接收周期结束后,第二无线设备的业务优先级为2,第二无线设备的业务优先级上升为最高优先级,则第二无线设备确定与第三接入周期相邻的下一个接入周期为第二无线设备的专属接入周期。其中,优先级的初始值和最大值可由高层参数配置,或预定义。
本申请还提供了一种使用免授权频段进行通信的方法1200。与方法400不同的是,在方法1200中,第一指示信息仅指示一种内容。第一无线设备通过是否检测到第一指示信息确定该第一无线设备是否可以使用第二无线设备的专属时间单元(即,第二时间单元)。如图12所示,方法1200包括以下几个步骤。
S1210,第一无线设备在第一时间单元内检测第一指示信息,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,第一指示信息用于指示第二无线设备是否在第二时间单元内传输数据,其中,第二时间单元为预设的用于第二无线设备传输数据的时间单元,第一时间单元的时域位置在所述第二时间单元的时域位置之前。
根据第一指示信息所指示的内容的不同,第一无线设备所执行的后续步骤也不同。
当第一指示信息用于指示第二无线设备不在第二时间单元内传输数据时,第一无线设 备执行步骤1220或步骤1230。
步骤1220,第一无线设备根据检测到第一指示信息在第三时间单元内进行信道检测和/或CCA。
步骤1230,第一无线设备根据未检测到第一指示信息确定不进行信道检测和/或CCA。
当第一指示信息用于指示第二无线设备在第二时间单元内传输数据时,第一无线设备执行步骤1240或步骤1250。
步骤1240,第一无线设备根据未检测到第一指示信息在第三时间单元内进行信道检测和/或CCA。
步骤1250,第一无线设备根据检测到第一指示信息确定不进行信道检测和/或CCA。
上述步骤1220至步骤1250均为可选的步骤。
方法1200中的第一指示信息与方法400中的第一指示信息相同,为了简洁,在此仅举出一个例子。
例如,第一指示信息与参考信号序列X之间存在对应关系。若第一无线设备在第一时间单元内检测到参考信号序列X,则第一无线设备确定检测到了第一指示信息。若第一无线设备在第一时间单元内未检测到参考信号序列X,则第一无线设备确定未检测到第一指示信息。
若第一无线设备未检测到第一指示信息,则第一无线设备可以根据第一指示信息所指示的内容执行相应的步骤。需要说明的是,第一指示信息所指示的内容是预设的,即,第一无线设备在检测第一指示信息之前已知晓第一指示信息所指示的内容。
综上所述,在方法1200中,无线设备被分配一个专属时间单元(多个无线设备的专属时间单元可能在时域上部分或全部重合),保证了所述无线设备的传输可靠性,避免了背景技术中所述的问题。在一些情况下,例如,第二无线设备当前的无线通信环境较好,或者,第二无线设备当前待传输的数据的优先级较低,或者,第一无线设备有紧急数据需要传输,第二无线设备可以指示第二时间单元可被其它无线设备(例如,第一无线设备)使用,从而提高了免许可传输资源的利用率以及免许可传输的灵活性。
此外,由于第一无线设备根据是否检测到第一指示信息确定是否进行信道检测和/或CCA,因此,第一无线设备可减少信道检测和/或CCA的频率,节省第一无线设备的能量消耗。对于第二无线设备,其通过指示第二时间单元不可用于共享,使得第二时间单元为第二无线设备专属的时间单元。在第二时间单元上由于无其它无线设备存在,则第二无线设备受到的干扰大小进一步降低,提高了第二无线设备数据传输的频谱效率。而且,第二无线设备的数据传输可靠性也可进一步提高,因为系统中存在多个预定义的资源可作为第二无线设备专属的时间单元。
需要说明的是,方法1200中,第一无线设备确定第二时间单元是否能够被共享之后(或者,第一无线设备确定第二无线设备是否在第二时间单元内传输数据之后),后续的处理方式可以与方法400中的处理方式相同,为了简洁,在此不再赘述。
上文详细介绍了本申请提供的使用免授权频段进行通信的方法的示例。可以理解的是,使用免授权频段的通信装置为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。 某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
本申请可以根据上述方法示例对使用免授权频段的通信装置进行功能单元的划分,例如,可以将各个功能划分为各个功能单元,也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。需要说明的是,本申请中对单元的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。
图13是本申请实施例提供的一种终端设备的结构示意图。该终端设备可适用于图1所示出的系统中,实现上述方法实施例中第一网络设备或者第二网络设备的功能。为了便于说明,图13仅示出了终端设备的主要部件。如图13所示,终端设备1300包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理,以及对整个终端设备进行控制,执行软件程序,处理软件程序的数据,例如用于支持终端设备执行上述方法实施例中所描述的动作,如,根据参考信号指示信息,发送上行数据等。存储器主要用于存储软件程序和数据,例如存储上述实施例中所描述各种指示信息。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器,主要用于收发电磁波形式的射频信号。输入输出装置,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后,处理器可以读取存储单元中的软件程序,解释并执行软件程序的指令,处理软件程序的数据。当需要通过无线发送数据时,处理器对待发送的数据进行基带处理后,输出基带信号至射频电路,射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时,射频电路通过天线接收到射频信号,将射频信号转换为基带信号,并将基带信号输出至处理器,处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解,为了便于说明,图13仅示出了一个存储器和一个处理器。在实际的终端设备中,可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等,本申请对此不做限定。
作为一种可选的实现方式,处理器可以包括基带处理器和/或中央处理器,基带处理器主要用于对通信协议以及通信数据进行处理,中央处理器主要用于对整个终端设备进行控制,执行软件程序,处理软件程序的数据。图13中的处理器可以集成基带处理器和中央处理器的功能,本领域技术人员可以理解,基带处理器和中央处理器也可以是各自独立的处理器,通过总线等技术互联。本领域技术人员可以理解,终端设备可以包括多个基带处理器以适应不同的网络制式,终端设备可以包括多个中央处理器以增强其处理能力,终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中,也可以以软件程序的形式存储在存储单元中,由处理器执行软件程序以实现基带处理功能。
在本申请实施例中,可以将具有收发功能的天线和控制电路视为终端设备1300的收发单元1301,例如,用于支持终端设备执行如图4所示的接收功能,或者,用于支持终 端设备执行如图8所示的发送功能,或者,支持终端设备执行如图12所示的检测功能。将具有处理功能的处理器视为终端设备1300的处理单元1302。如图13所示,终端设备1300包括收发单元1301和处理单元1302。收发单元也可以称为收发器、收发机、收发装置等。可选的,可以将收发单元1301中用于实现接收功能的器件视为接收单元,将收发单元1301中用于实现发送功能的器件视为发送单元,即收发单元1301包括接收单元和发送单元,接收单元也可以称为接收机、输入口、接收电路等,发送单元可以称为发射机、发射器或者发射电路等。
处理器1302可用于执行该存储器存储的指令,以控制收发单元1301接收信号和/或发送信号,完成上述方法实施例中终端设备的功能。作为一种实现方式,收发单元1301的功能可以考虑通过收发电路或者收发的专用芯片实现。
图14是本申请提供的一种网络设备的结构示意图,该网络设备例如可以为基站。如图14所示,该基站可应用于如图1所示的系统中,实现上述方法实施例中第一无线设备或第二无线设备的功能。基站1400可包括一个或多个射频单元,如远端射频单元(remote radio unit,RRU)1401和一个或多个基带单元(baseband unit,BBU)(也可称为数字单元(digital unit,DU))1402。所述RRU 1401可以称为收发单元、收发机、收发电路、或者收发器等等,其可以包括至少一个天线14011和射频单元14012。所述RRU 1401部分主要用于射频信号的收发以及射频信号与基带信号的转换,例如用于支持基站执行如图8所示的发送功能。BBU 1402主要用于进行基带处理,对基站进行控制等。RRU 1401与BBU 1402可以是物理上设置在一起的,也可以物理上分离设置的,即分布式基站。
BBU 1402为基站的控制中心,也可以称为处理单元,主要用于完成基带处理功能,如信道编码,复用,调制,扩频等等。例如BBU(处理单元)1402可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个示例中,BBU 1402可以由一个或多个单板构成,多个单板可以共同支持单一接入指示的无线接入网(如LTE网),也可以分别支持不同接入制式的无线接入网(如LTE网,5G网或其它网)。所述BBU 1402还包括存储器14021和处理器14022,所述存储器14021用于存储必要的指令和数据。例如存储器14021存储上述方法实施例中的各种指示信息。所述处理器145022用于控制基站进行必要的动作,例如用于控制基站执行上述方法实施例中的操作流程。所述存储器14021和处理器14022可以服务于一个或多个单板。也就是说,可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路
图15给出了一种通信装置1500的结构示意图。装置1500可用于实现上述方法实施例中描述的方法,可以参见上述方法实施例中的说明。所述通信装置1500可以是芯片,网络设备(如基站),终端设备或者其它无线通信设备等。
所述通信装置1500包括一个或多个处理器1501。所述处理器1501可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理,中央处理器可以用于对通信装置(如,基站、终端、或芯片等)进行控制,执行软件程序,处理软件程序的数据。所述通信装置可以包括收发单元,用以实现信号的输入(接收)和输出(发送)。例如,通信装置可以为芯片,所述收发单元可以是芯片的输入和/或输出电路,或者通信接口。所述芯片可以用于终端或基站或其 他网络设备。又如,通信装置可以为终端或基站或其他网络设备,所述收发单元可以为收发器,射频芯片等。
所述通信装置1500包括一个或多个所述处理器1501,所述一个或多个处理器1501可支持通信装置1500实现图4或图8或图12所示的方法。
在一种可能的设计中,所述通信装置1500包括用于生成指示信息的部件(means),以及用于发送指示信息的部件。可以通过一个或多个处理器来实现所述生成指示信息的部件以及发送指示信息的部件的功能。例如可以通过一个或多个处理器生成指示信息(例如,第一指示信息和/或第二指示信息),通过收发器、或输入/输出电路、或芯片的接口发送所述指示信息。所述指示信息可以参见上述方法实施例中的相关描述。
在一种可能的设计中,所述通信装置1500包括用于接收指示信息(例如,第一指示信息和/或第二指示信息)的部件(means)。所述指示信息可以参见上述方法实施例中的相关描述。例如可以通过收发器、或输入/输出电路、或芯片的接口接收所述指示信息,通过一个或多个处理器解析该指示信息。
可选的,一种设计中,处理器1501可以执行指令,使得所述通信装置1500执行上述方法实施例中描述的方法。所述指令可以全部或部分存储在所述处理器内,如指令1503,也可以全部或部分存储在与所述处理器耦合的存储器1502中,如指令1504,也可以通过指令1503和1504共同使得通信装置1500执行上述方法实施例中描述的方法。
在又一种可能的设计中,通信装置1500也可以包括电路,所述电路可以实现前述方法实施例中第一无线设备或第二无线设备的功能。
在又一种可能的设计中,所述通信装置1500中可以包括一个或多个存储器1502,其上存有指令1504,所述指令可在处理器上被运行,使得所述通信装置1500执行上述方法实施例中描述的方法。可选地,所述存储器中还可以存储有数据。可选地,处理器中也可以存储指令和/或数据。例如,所述一个或多个存储器1502可以存储上述实施例中所描述的指示信息。所述处理器和存储器可以单独设置,也可以集成在一起。
在又一种可能的设计中,所述通信装置1500还可以包括收发单元1505以及天线1506。所述处理器1501可以称为处理单元,对通信装置(终端或者基站)进行控制。所述收发单元1505可以称为收发机、收发电路、或者收发器等,用于通过天线1506实现通信装置的收发功能。
本申请还提供一种通信系统,其包括前述的一个或多个网络设备,和,一个或多个终端设备。
应注意,本申请实施例中的处理器可以是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读 存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请还提供了一种计算机可读介质,其上存储有计算机程序,该计算机程序被计算机执行时实现上述任一方法实施例所述的通信方法。
本申请还提供了一种计算机程序产品,该计算机程序产品被计算机执行时实现上述任一方法实施例所述的通信方法。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,高密度数字视频光盘(digital video disc,DVD))、或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。
本申请实施例还提供了一种处理装置,包括处理器和接口;所述处理器,用于执行上述任一方法实施例所述的通信方法。
应理解,上述处理装置可以是一个芯片,所述处理器可以通过硬件来实现也可以通过软件来实现,当通过硬件实现时,该处理器可以是逻辑电路、集成电路等;当通过软件来实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现,改存储器可以集成在处理器中,可以位于所述处理器之外,独立存在。
在本申请的各种实施例中,各步骤的序号的大小并不意味着执行顺序的先后,而不应 被理解为对本申请的实施例的实施过程构成任何限定,各步骤的执行顺序应基于其功能和内在逻辑确定。
另外,本文中术语“系统”和“网络”在本文中常被可互换使用。本文中的术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本申请所使用的,盘(disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁 性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本申请技术方案的较佳实施例而已,并非用于限定本申请的保护范围。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种通信方法,其特征在于,包括:
    第一无线设备在第一时间单元内接收第一指示信息,所述第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,所述第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,所述第二时间单元为预设的用于所述第二无线设备传输数据的时间单元。
  2. 根据权利要求1所述的方法,其特征在于,所述方法还包括:
    所述第一无线设备在第三时间单元内进行信道检测和/或空闲信道评估CCA,其中,所述第一指示信息指示所述第二无线设备不在所述第二时间单元内传输数据,所述第三时间单元的时域位置在所述第一时间单元的时域位置之后,且,所述第三时间单元的时域位置在所述第二时间单元的时域位置之前。
  3. 根据权利要求1或2所述的方法,其特征在于,所述第一指示信息指示所述第二无线设备不在第二时间单元内传输数据,所述方法还包括:
    所述第一无线设备在第四时间单元内接收或检测第二指示信息,所述第二指示信息用于指示所述第一无线设备是否可在所述第二时间单元内传输数据,所述第四时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第四时间单元的时域位置在所述第一时间单元的时域位置之后。
  4. 根据权利要求3所述的方法,其特征在于,所述方法还包括:
    所述第一无线设备在第五时间单元内进行信道检测和/或CCA,其中,所述第五时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第五时间单元的时域位置在所述第四时间单元的时域位置之后。
  5. 根据权利要求3或4所述的方法,其特征在于,
    所述第二指示信息包括所述第一无线设备的标识,和/或,所述第二指示信息包括所述第一无线设备所属无线设备组的组标识,或者,
    所述第二指示信息不包括所述第一无线设备的标识,和/或,所述第二指示信息不包括所述第一无线设备所属无线设备组的组标识。
  6. 一种通信方法,其特征在于,包括:
    第二无线设备获取第一指示信息,所述第一指示信息用于指示所述第二无线设备在第二时间单元内传输数据,或者,所述第一指示信息用于指示所述第二无线设备不在第二时间单元内传输数据,所述第二时间单元为预设的用于所述第二无线设备传输数据的时间单元;
    所述第二无线设备在第一时间单元内发送所述第一指示信息。
  7. 根据权利要求6所述的方法,其特征在于,所述第一指示信息指示所述第二无线设备不在第二时间单元内传输数据,所述方法还包括:
    所述第二无线设备在第四时间单元内发送第二指示信息,所述第二指示信息用于指示在所述第二时间单元内传输数据的无线设备,所述第四时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第四时间单元的时域位置在所述第一时间单元的时域位 置之后。
  8. 根据权利要求7所述的方法,其特征在于,所述第二指示信息包括所述无线设备的标识,和/或,所述第二指示信息包括所述无线设备所属无线设备组的组标识。
  9. 根据权利要求6所述的方法,其特征在于,所述第一指示信息指示所述第二无线设备在第二时间单元内传输数据,所述方法还包括:
    所述第二无线设备在第六时间单元内进行信道检测和/或空闲信道评估CCA,其中,所述第六时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第六时间单元的时域位置在所述第四时间单元的时域位置之后。
  10. 根据权利要求7至9中任一项所述的方法,其特征在于,所述方法还包括:
    所述第二无线设备确定所述第二时间单元。
  11. 根据权利要求10所述的方法,其特征在于,所述第二无线设备确定所述第二时间单元,包括:
    所述第二无线设备根据预设规则确定所述第二时间单元;或者,
    所述第二无线设备获取高层信令,所述高层信令用于指示所述第二时间单元;所述第二无线设备根据所述高层信令确定所述第二时间单元。
  12. 一种通信装置,其特征在于,包括接收单元,用于:
    在第一时间单元内接收第一指示信息,所述第一指示信息用于指示第二无线设备在第二时间单元内传输数据,或者,所述第一指示信息用于指示第二无线设备不在第二时间单元内传输数据,所述第二时间单元为预设的用于所述第二无线设备传输数据的时间单元。
  13. 根据权利要求12所述的通信装置,其特征在于,所述通信装置还包括处理单元,用于:
    在第三时间单元内进行信道检测和/或空闲信道评估CCA,其中,所述第一指示信息指示所述第二无线设备不在所述第二时间单元内传输数据,所述第三时间单元的时域位置在所述第一时间单元的时域位置之后,且,所述第三时间单元的时域位置在所述第二时间单元的时域位置之前。
  14. 根据权利要求12或13所述的通信装置,其特征在于,所述第一指示信息指示所述第二无线设备不在第二时间单元内传输数据,所述处理单元还用于:
    在第四时间单元内接收或检测第二指示信息,所述第二指示信息用于指示所述通信装置是否可在所述第二时间单元内传输数据,所述第四时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第四时间单元的时域位置在所述第一时间单元的时域位置之后。
  15. 根据权利要求14所述的通信装置,其特征在于,所述处理单元还用于:
    在第五时间单元内进行信道检测和/或CCA,其中,所述第五时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第五时间单元的时域位置在所述第四时间单元的时域位置之后。
  16. 根据权利要求14或15所述的通信装置,其特征在于,
    所述第二指示信息包括所述通信装置的标识,和/或,所述第二指示信息包括所述通信装置所属无线设备组的组标识,或者,
    所述第二指示信息不包括所述通信装置的标识,和/或,所述第二指示信息不包括所 述通信装置所属无线设备组的组标识。
  17. 一种通信装置,其特征在于,包括处理单元和发送单元,
    所述处理单元用于:获取第一指示信息,所述第一指示信息用于指示所述通信装置在第二时间单元内传输数据,或者,所述第一指示信息用于指示所述通信装置不在第二时间单元内传输数据,所述第二时间单元为预设的用于所述通信装置传输数据的时间单元;
    所述发送单元用于:在第一时间单元内发送所述第一指示信息。
  18. 根据权利要求17所述的通信装置,其特征在于,所述第一指示信息指示所述通信装置不在第二时间单元内传输数据,所述发送单元还用于:
    在第四时间单元内发送第二指示信息,所述第二指示信息用于指示在所述第二时间单元内传输数据的无线设备,所述第四时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第四时间单元的时域位置在所述第一时间单元的时域位置之后。
  19. 根据权利要求18所述的通信装置,其特征在于,所述第二指示信息包括所述无线设备的标识,和/或,所述第二指示信息包括所述无线设备所属无线设备组的组标识。
  20. 根据权利要求17所述的通信装置,其特征在于,所述第一指示信息指示所述通信装置在第二时间单元内传输数据,所述处理单元还用于:
    在第六时间单元内进行信道检测和/或空闲信道评估CCA,其中,所述第六时间单元的时域位置在所述第二时间单元的时域位置之前,且,所述第六时间单元的时域位置在所述第四时间单元的时域位置之后。
  21. 根据权利要求18至20中任一项所述的通信装置,其特征在于,所述处理单元还用于:
    确定所述第二时间单元。
  22. 根据权利要求21所述的通信装置,其特征在于,所述处理单元具体用于:
    根据预设规则确定所述第二时间单元;或者,
    获取高层信令,所述高层信令用于指示所述第二时间单元;所述第二无线设备根据所述高层信令确定所述第二时间单元。
  23. 一种通信装置,其特征在于,包括至少一个处理器,所述至少一个处理器用于与存储器耦合,读取并执行所述存储器中的指令,以实现如权利要求1至11中任一项所述的方法。
  24. 一种计算机程序产品,其特征在于,包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得所述计算机执行如权利要求1至11中任一项所述的方法。
  25. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质上存储有计算机程序,当所述计算机程序在计算机上运行时,使得所述计算机执行如权利要求1至11中任一项所述的方法。
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