WO2019185010A1 - Procédé de communication et dispositif de communication - Google Patents

Procédé de communication et dispositif de communication Download PDF

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Publication number
WO2019185010A1
WO2019185010A1 PCT/CN2019/080376 CN2019080376W WO2019185010A1 WO 2019185010 A1 WO2019185010 A1 WO 2019185010A1 CN 2019080376 W CN2019080376 W CN 2019080376W WO 2019185010 A1 WO2019185010 A1 WO 2019185010A1
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Prior art keywords
period
channel
reservation
lbt
time period
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English (en)
Chinese (zh)
Inventor
尹久
蒋成钢
张兴新
王学寰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications and, more particularly, to a communication method and communication device.
  • LTE-U An unlicensed system based on long term evolution (LTE), such as: licensed assisted access (LAA), enhanced licensed spectrum assisted access (enhanced licensed) Assisted access (eLAA), MulteFire system, its channel access mechanism uses Listening Before Talk (LBT) to coordinate multiple systems to access unlicensed spectrum, avoiding interference between multiple nodes and simultaneously Ensure the fairness of access.
  • LAA licensed assisted access
  • eLAA enhanced licensed spectrum assisted access
  • MulteFire system its channel access mechanism uses Listening Before Talk (LBT) to coordinate multiple systems to access unlicensed spectrum, avoiding interference between multiple nodes and simultaneously Ensure the fairness of access.
  • LBT Listening Before Talk
  • 5G new radio
  • NR-U new radio
  • LTE-U can work on larger bandwidths by carrier aggregation (CA).
  • CA carrier aggregation
  • the maximum bandwidth of each carrier of LTE is 20MHz.
  • the CA feature can aggregate multiple 20MHz carriers that are continuous or non-contiguous to provide users with more bandwidth wireless access services.
  • the 5th generation (5G) new radio (NR) system increases the maximum bandwidth of the carrier to 400MHz, and also supports the transmission of larger bandwidth through the CA feature.
  • the LTE-U/NR-U system using carrier aggregation can compete for accessing the unlicensed spectrum by using the LBT method described above.
  • the method is called a Type A with defer mechanism access channel.
  • the network device In the Type A with defer channel access mode, the network device independently starts the LBT on all 20 MHz channels, and if it hears that the channel is idle, it waits (defer). No data is transmitted during the waiting period, waiting for multiple channels to be intercepted, short-listening the channel in the waiting state before transmission, and then performing LTE-U
  • the target node In the channel access mode of the current type A with defer, after the target node is backed off, it is necessary to wait until the slot boundary or multiple channels are backed off before sending data. During this period, the channel may be preempted by other unauthorized nodes. This causes the target node to lose the opportunity to send data.
  • the present application provides a communication method and communication device capable of improving system capacity.
  • a communication method comprising:
  • Channel detection is performed for each transmission resource of the plurality of transmission resources that is not currently performing LBT interception;
  • the first time period is adjacent to the second time period and does not overlap,
  • the transmission resource may be a channel, a radio frequency (RF) channel, a beam, or a carrier. If the transmission resource is a channel or a carrier, the multiple channels or carriers may be used for carrier aggregation.
  • RF radio frequency
  • the target node In the channel access mode of the current type A with defer, after the target node is backed off, it is necessary to wait until the slot boundary or multiple channels are backed off before sending data. During this period, the channel may be preempted by other unauthorized nodes. The target node loses the opportunity to send data.
  • the communication method provided by the present application can prevent the transmission resource that completes the LBT interception from being preempted by other nodes by periodically transmitting the reserved signal on the transmission resource that completes the LBT interception, thereby improving the channel competition capability. problem.
  • the reserved signal is periodically transmitted on the transmission resource that completes the LBT interception, instead of transmitting the reserved signal (ie, the start time slot for transmitting data), the reserved signal is always sent, so that The transmission resource that completes the LBT interception may have the opportunity to perform the rollback, so that the transmission resource of the currently uncompleted LBT interception may complete the LBT interception before the transmission slot arrives, thereby increasing the transmission resource of the uncompleted LBT interception. The opportunity to send data after the start of the start time slot, thereby increasing system capacity.
  • the determining, according to the channel status of the first time period in the jth reservation period, of each of the plurality of transmission resources that are not currently being processed by the LBT includes:
  • the channel detection result in the second time period of the j-1th reservation period is busy, the first transmission resource in each of the plurality of transmission resources that is not currently in the LBT listening is busy.
  • the channel status of the first transmission resource in the first time period in the jth reservation period is busy;
  • the channel detection result in the second time period of the j-1th reservation period is idle, the first transmission resource in each of the plurality of transmission resources that is not currently in the LBT listening is idle.
  • the channel status of the first transmission resource in the first time period in the jth reservation period is idle;
  • the first transmission resource is any one of the transmission resources of the plurality of transmission resources that are not currently LBT-detected.
  • the first transmission resource is considered to be the first time in the next reservation period.
  • the channel status within the segment is busy. If the first transmission resource that has not completed the rollback is in the second time period of the current reservation period, the detection result is idle. Then, it is considered that the channel state of the first transmission resource in the first time period in the next reservation period is idle. If the channel state is idle, the transmitting end may perform initial CCA detection and/or perform extended CCA detection according to the duration of the first time period and the duration of the second time period in the previous reservation period.
  • the determining, according to the channel status of the first time period in the jth reservation period, of each of the plurality of transmission resources that are not currently being processed by the LBT includes:
  • the channel detection result in the second period of the 1 reservation period is idle, and the back-end random number P corresponding to the j-th reservation period end time is set to S1 is the duration of the first time period, S2 is the duration of the first time period, T1 is the detection period of the initial CCA, and T2 is the extended CCA detection period. Indicates rounding down;
  • the first transmission resource is any one of the transmission resources of the plurality of transmission resources that are not currently being processed by the LBT.
  • the method further includes:
  • the data to be transmitted is sent on the ith transmission resource.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • a communication method including:
  • the short-listening in the time period sends a reserved signal on each subchannel that is idle, and in the first time period in the jth in the reserved period, the channel state in the plurality of channels is not Channel listening for each channel that is busy;
  • the short listening is performed on each of the plurality of channels whose channel state is busy.
  • the primary channel and the short channel that is short-interviewed are idle.
  • the reserved signal is periodically transmitted until the time between the transmission time of the current reserved signal and the start time slot is less than the preset duration.
  • the period before the reserved signal is sent and the period after the reserved signal is sent are used for the uplink and downlink switching.
  • the two periods can be said to be the switching time.
  • the total duration of the switching time and the time at which the reserved signal is transmitted is the first time period.
  • channel listening is not performed on the subchannel that is currently short listening, or channel sensing is not performed on the multiple channels.
  • short listening is performed on the subchannel that is currently short listening. If the short listening result of a certain subchannel is idle, the reserved signal is transmitted on the subchannel in the first time period in each subsequent reservation period.
  • the communication method provided by the present application can avoid the primary channel and the short channel that is short to be idle as possible by periodically transmitting the reserved signal on the primary channel that completes the LBT listening and the short channel that is short-listening idle. It is preempted by other nodes, which can improve the problem of reduced channel competitiveness. Moreover, since the reserved signal is periodically transmitted on the primary channel and the short channel that is short to listen to idle, instead of transmitting the time slot (ie, the starting time slot for transmitting data), the reservation is always sent before the arrival. The signal makes it possible to access the short channel that is short-listened as busy, which can increase the chance that the short-listening busy sub-channel transmits data after the start time slot arrives, thereby increasing the system capacity.
  • the method further includes:
  • the channel listening result of the primary channel in the at least one second channel is idle when the starting time slot arrives, if the channel is in the at least one second channel
  • the channel listening result of any channel other than the primary channel is idle, and the data to be transmitted is transmitted on the primary channel and the any channel from the initial time slot.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • a communication method including:
  • the first communication device performs the following operations from the first reservation period to the Nth reservation period after the completion of the LBT interception, where the start time of the (N+1)th reservation period is The duration between the starting time slots is less than the preset duration:
  • the first communications device periodically sends the reserved signal until the current The duration between the sending time of the reserved signal and the starting time slot is less than the preset duration.
  • the period before the reserved signal is sent and the period after the reserved signal is sent are used for the uplink and downlink switching.
  • the two periods can be said to be the switching time.
  • the total duration of the switching time and the time at which the reserved signal is transmitted is the first time period.
  • the second communication device When performing the channel detection, the second communication device considers that the channel state is idle if the detected signal is a known reserved signal, and considers that the channel state is busy if the detected signal is an unknown signal.
  • the transmitting end continues the initial CCA detection or the extended CCA detection according to the channel status.
  • the first communication device can prevent the channel resources from being preempted by other nodes by periodically transmitting the reserved signal, thereby improving the problem of reduced channel competitiveness. Moreover, since the channel state when the known reserved signal is detected is regarded as idle when the second communication device performs channel detection, it is possible to increase the second communication device to transmit data after the start time slot arrives. Opportunity to increase system capacity.
  • the method may further include:
  • the first communication device performs channel detection from the end time of the Nth reservation period to the start time slot;
  • the first communications device sends data to be transmitted starting from the starting time slot.
  • the first communication starts from the (N+1)th reservation period to the start time slot.
  • the device performs channel sounding. If the channel listening result is idle, the first communication device can transmit the data to be transmitted from the start time slot.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • a communication method including:
  • the second communication device performs channel detection
  • the signal detected by the second communications device is a reserved signal, determining that the channel state of the reserved signal transmission duration is idle;
  • the second communication device performs listening and then speaking LBT according to the channel state.
  • the second communication device since the channel state when the second communication device performs channel detection, the channel state when the known reserved signal is detected is regarded as idle, the second communication device can be increased in the start time slot. The opportunity to send data after arrival, thereby increasing system capacity.
  • the methods provided by the above aspects also include various implementations described below.
  • the preset duration is twice the duration of the reserved period.
  • the first time period duration and the second time period duration are determined according to priorities of data to be sent.
  • the first time period includes transmitting the reserved signal duration and the switching duration.
  • the length of the reserved signal is the length of time during which the reserved signal is transmitted.
  • the transmitting end does not perform any operation, that is, does not transmit data and does not receive data. It should be understood that, when the sending end of the present application sends the reserved signal in the first time period, the transmitting end transmits the reserved signal only for the time for transmitting the reserved signal in the first time period, and does not send the reserved signal during the switching time. .
  • the reserved signal duration may be 12 us, the duration of the first time period is 27 us, and the duration of the second time period is 18 us. In other words, the reservation period is 45us.
  • the reserved signal may be a short training filed (STF) signal, so that the WIFI node detects the signal.
  • STF short training filed
  • the duration of the reserved signal can be the duration of the 15 STF signals. Among them, the length of each STF signal is 0.8us.
  • a communication device for performing the method of any of the first to fourth aspects or any of the first to fourth aspects of the above.
  • the present application provides a communication device including: a memory, a processor, and a transceiver, the memory storing a computer program executable on the processor, the processor executing when executing the computer program The method of any of the first to fourth aspects or any of the first to fourth aspects of the above.
  • the present application provides a communication device including: a memory, a processor, and a transceiver, the memory storing a computer program executable on the processor, the processor executing when executing the computer program The method of any of the first aspect to the fourth aspect or any of the first aspect to the fourth aspect.
  • the present application provides a computer readable medium for storing a computer program comprising instructions for performing the methods of the above aspects or any of the possible implementations of the above aspects.
  • the present application provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform the methods of the above aspects or any of the possible implementations of the above aspects.
  • the present application provides a chip, including: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path.
  • the processor is operative to execute code in the memory, and when the code is executed, the processor is operative to perform the methods of the above aspects or any of the possible implementations of the various aspects described above.
  • Figure 1 is a schematic diagram of an LBT process.
  • FIG. 2 is a schematic diagram of a Type A with defer channel access mode.
  • FIG. 3 is a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • Figure 7 is a schematic diagram of a reservation period.
  • FIG. 8 is a schematic diagram of a communication method for implementing an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a communication method implementing one embodiment of the present application.
  • FIG. 10 is a schematic diagram of a communication method for implementing an embodiment of the present application.
  • FIG. 11 is a schematic flow chart of another communication method provided in accordance with the present application.
  • FIG. 12 is a schematic diagram of a communication method for implementing an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of a communication method according to another embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a communication device in accordance with an embodiment of the present application.
  • 15 is a schematic block diagram of a communication device in accordance with an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • LBT is a channel access mechanism that enables LTE networks to coexist with other networks and compete for unlicensed spectrum resources. Because the availability of channels on unlicensed bands is not always guaranteed, LBT requires listening to the channel before transmitting data, performing clear channel assessment (CCA), and then performing data transmission while ensuring that the channel is idle.
  • CCA clear channel assessment
  • 3GPP adopts a load-based adaptive fallback window LBT mechanism (ie, category 4) as the basis of the LAA downlink channel access mechanism.
  • LBT mechanism ie, category 4
  • the flow chart of the LBT mechanism based on the load-based adaptive fallback window is shown in Figure 1.
  • the LBT process is described as follows:
  • the LAA base station performs initial CCA detection, and the detection period is T1. For example, it can take 34us (same as the DIFS of WIFI). If the channel is detected to be idle within T1, skip to the next step; otherwise, continue the initial CCA detection.
  • the detection period is T2, for example, 9us (same as the WIFI slot). If the channel is detected to be idle within T2, skip to the next step, otherwise, return to step (2).
  • ECCA extended channel assessment
  • channel detection needs to be performed at the next T1 time. If it is detected that the channel is still busy at time T1 after T2, channel detection is performed again at the next T1 time, and the ECCA process is continued after the T1 time detects that the channel is idle.
  • slot boundary in the embodiment of the present application refers to a slot boundary for transmitting data, and may be a field boundary, which is not limited in this embodiment of the present application.
  • the LTE-U/NR-U system using carrier aggregation can access the unlicensed spectrum through the mechanism of Type A with defer.
  • the LBT is independently activated on each 20 MHz channel of carrier aggregation. If the time at which the channel completes the backoff is not the slot boundary, then a defer is performed, and no data is transmitted during the waiting period. Waiting for multiple channels to complete the rollback, the short-listening of the channel in the waiting state before the arrival of the slot boundary, and the short-listening idle channel can be used for LTE-U/NR-U transmission.
  • channel sensing must be performed on channel A and channel B.
  • the backoff random number of channel A is 8, and the target node detects that channel A is idle at time T1, and detects that channel A is idle for the next eight T2 times.
  • the backoff random number of channel B is 3.
  • Channel B waits after completing the channel fallback, does not perform any operation during the waiting period, and performs short listening before the time slot t 0 time comes. Since channel A has completed LBT interception or completed rollback before the arrival of time t 0 , if channel B short listening result is idle, the target node can transmit data on channel A and channel B from time t 0 . .
  • the target node In the channel access mode of the current type A with defer, after the target node is backed off, it is necessary to wait until the slot boundary or multiple channels are backed off before sending data. During this period, the channel may be preempted by other unauthorized nodes. The target node loses the opportunity to send data. For example, as shown in FIG. 2, if the result of short listening by channel B before the arrival of the slot boundary t 0 is busy, the target node will lose the opportunity to transmit data on channel B.
  • the present application provides a communication method, which can prevent the transmission resource of the LBT interception from being preempted by other nodes by periodically transmitting the reserved signal on the transmission resource that completes the LBT interception. Improve the problem of reduced channel competitiveness.
  • the reserved signal is periodically transmitted on the transmission resource that completes the LBT interception, instead of transmitting the reserved signal (ie, the start time slot for transmitting data), the reserved signal is always sent, so that The transmission resource that completes the LBT interception may have the opportunity to perform the rollback, so that the transmission resource of the currently uncompleted LBT interception may complete the LBT interception before the transmission slot arrives, thereby increasing the transmission resource of the uncompleted LBT interception.
  • the opportunity to send data after the start of the start time slot thereby increasing system capacity.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G future fifth generation
  • 5G fifth generation
  • NR new radio
  • the terminal device in the embodiment of the present application may refer to a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless device.
  • Communication device user agent or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a global system of mobile communication (GSM) system or code division multiple access (CDMA).
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • a base transceiver station (BTS) may also be a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolutional) in an LTE system.
  • the node B, eNB or eNodeB) may also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a future.
  • the network device in the 5G network or the network device in the PLMN network in the future is not limited in this embodiment.
  • FIG. 3 to FIG. 5 To facilitate understanding of the embodiments of the present application, a communication system suitable for the embodiment of the present application will be briefly described with reference to FIG. 3 to FIG. It should be understood that the network devices or terminal devices in FIGS. 3 to 5 all operate in an unlicensed frequency band.
  • FIG. 3 is a schematic diagram of a communication system 100 suitable for use in the communication method of the embodiment of the present application.
  • the communication system 100 includes at least two communication devices, such as a network device 110 and a terminal device 120, wherein data communication can be performed between the network device 110 and the terminal device 120 through a wireless connection.
  • the network device 110 needs to send data to the terminal device 120, the network device 110 can perform channel access by using the communication method of the embodiment of the present application.
  • the communication system 200 includes at least two communication devices, for example, a terminal device 130 and a terminal device 140, wherein the terminal device 130 and the terminal device 140 can communicate through a device to device (D2D). The way to communicate data.
  • D2D device to device
  • FIG. 5 is a schematic diagram of a communication system 300 suitable for use in the communication method of the embodiment of the present application.
  • the communication system 300 includes at least two communication devices, such as a network device 150 and a network device 160, wherein the network device 150 and the network device 160 perform data communication through a backhaul link.
  • each of the communication systems shown in FIG. 3 to FIG. 5 may further include more network nodes, such as a terminal device or a network device, and the embodiments of the present application are not shown in the figure.
  • Channel listening can also be referred to as channel detection.
  • the CCA detection time can be 4us. If the 4us channel detection result is idle, then the channel state is also idle for the next 5 us. It should be understood that the embodiment of the present application does not limit the duration of CCA detection.
  • the method of CCA detection weights the power value of all received interference nodes to obtain an interference value for the target node, and compares the interference value with a preset interference threshold, if the value is greater than the threshold value. If the status of the channel is busy at this time, the status of the channel is idle at this time.
  • the method of the present application does not limit the method for detecting the CCA.
  • the method for detecting the CCA can refer to the prior art, and details are not described herein again.
  • Short listening is relative to full listening.
  • the short snooping can be, for example, two 9us listeners, or three 9us listeners, which is not limited by the embodiment of the present application.
  • the full snooping can be, for example, five 9 us listens or 10 9 us listens, which is not limited by the embodiment of the present application.
  • Short-term listening of X duration refers to channel interception for the duration of X.
  • Short listening of Y duration It means that channel interception is always performed within the Y duration. Generally, Y>X.
  • FIG. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the transmission resources are channel-accessed according to the LBT mechanism shown in FIG. 1.
  • the transmitting end in the method shown in FIG. 6 may be the network device 110 in the system 100 shown in FIG. 3, or may be any terminal device in the system 200 shown in FIG. 4, and may also be FIG. 5. Any of the network devices in system 300 shown.
  • S610 Determine a starting time slot in which a transmission resource that first completes LBT listening is used to send data among multiple transmission resources.
  • the transmission resource After the transmission resource completes LBT snooping, it needs to wait until the slot boundary to send data. In this application, it is required to determine a slot boundary of a transmission resource in which the LBT is first intercepted among the plurality of transmission resources, that is, the start slot. It should be understood that, when the start time slot arrives, if the resource state of the transmission resource that first completes the LBT interception is idle, the data may be transmitted on the transmission resource that first completes the LBT interception. If any one of the plurality of transmission resources except the transmission resource that first completes the LBT interception is completed before the arrival of the start time slot, and any transmission is completed when the start time slot arrives, The resource's resource status is also idle, so data can also be sent on any of the transport resources.
  • the transmission resource may be a channel, a radio frequency (RF) channel, a beam, or a carrier. If the transmission resource is a channel or a carrier, the multiple channels or carriers may be used for carrier aggregation.
  • RF radio frequency
  • S620 Perform the following first period from the first reservation period to the Nth reservation period after the LBT interception of the ith transmission resource in the transmission resource that is currently completed by the LBT. Reserve operation.
  • the duration between the start time and the start time slot of the (N+1)th reservation period is less than the preset duration.
  • i 1, 2, ..., M, M is the total number of transmission resources currently completing LBT listening.
  • the first reservation operation is performed from the moment when the transmission resource completes the LBT interception, until the current pre-operation
  • the duration between the start time of the retention period and the start time slot is less than a preset duration.
  • the first reservation operation is specifically: sending a reserved signal on the i th transmission resource in the first time period of the jth reservation period, and being the first one in the jth reservation period During the time period, channel detection is not performed on each transmission resource of the plurality of transmission resources that is currently not completed for LBT interception. Determining that the channel state of each transmission resource of the current incomplete LBT interception is busy during the first time period in the first reservation period. In the case of j>1, the channel state of the first time period in the jth reservation period of each transmission resource of the LBT interception is not determined to perform initial CCA detection and/or extended CCA detection.
  • channel detection is performed on each transmission resource of the plurality of transmission resources that is currently not completed for LBT to perform initial CCA detection and/or extended CCA detection.
  • M is the total number of transmission resources that are currently completed by the LBT
  • the first time period is adjacent to the second time period and does not overlap
  • the sum of the first time period and the second time period is greater than Or equal to the sum of the initial CCA detection period T1 duration and the extended CCA detection period T2 duration
  • the first time period duration is greater than the second time period duration
  • j 1, 2, . . . , N.
  • transmission resource #R For each transmission resource that completes the LBT interception, if the transmission resource (reported as: transmission resource #R) completes the LBT listening time and the time length before the start time slot is greater than the preset duration, the transmission is performed.
  • the resource #R periodically transmits the reservation signal from the time when the LBT is detected, until the time between the transmission time of the current reserved signal and the start time slot is less than the preset duration.
  • the period before the reserved signal is sent.
  • a period of time after the reserved signal is sent for uplink and downlink handover, where the two periods of time can be said to be the switching time.
  • the total duration of the switching time and the time for transmitting the reserved signal is the first time period.
  • the transmission resource #R When the reserved signal is sent, channel detection is not performed on each transmission resource that is currently not completed for LBT interception, and each transmission resource that is not currently performing LBT interception is considered to be transmitting the reserved signal for the first time in the transmission resource #R.
  • the channel state in a period of time ie, within the first period of the first reservation period
  • the second pre-transmission from the resource #R Start cycle Performing initial CCA detection and/or extended CCA detection according to the determined channel state in the first time period in each reserved period, until the LBT listening transmission resource is not completed, or until the current pre-up
  • the duration between the start time of the retention period and the start time slot is less than a preset duration.
  • the resource Starting from the first reservation period of the transmission resource #R, in the second time period of each reservation period , transmitting no signal on the transmission resource #R, and performing initial CCA detection and/or extended CCA detection on each transmission resource of the plurality of transmission resources that are not currently completed by the LBT, until the transmission of the LBT interception is not currently completed.
  • the resource completes LBT snooping or until the duration between the start time of the reservation period and the start time slot is less than the preset duration.
  • initial CCA detection and/or extended CCA detection is performed according to the determined channel state in the first time period in each reserved period, and in a second time period in each reserved period , transmitting no signal on the transmission resource #R, and performing initial CCA detection and/or extended CCA detection on each transmission resource of the plurality of transmission resources that are not currently performing LBT interception means that the transmitting end is not actually in the first Channel detection is performed on a transmission resource that is not completed LBT listening for a period of time, but a transmission resource that does not complete LBT interception is set according to the channel state of the transmission resource in which the LBT is not detected in the first time period. The state at the end of the first time period.
  • the first time period is idle on the transmission resource that the sender considers to have not completed the LBT interception, and the duration of the first time period is 27 us, the first time is not completed on the transmission resource of the LBT interception.
  • the state of the end time of the segment is: the first 27us channel is idle.
  • the extended CCA detection period T2 is 9 us, and if the channel detection result of the first 7 us subsequent to the second time period adjacent to the first time period is idle.n, starting from the 8th state of the second time period, the transmission resource of the uncompleted LBT interception enters the extended CCA detection phase, and if it is within the transmission resource of the uncompleted LBT interception within 11us of the second time period If the channel detection result is idle, then the backoff random number of the transmission resource that is not completed by the LBT is decremented by one.
  • the sending end of the present application sends a reserved signal in the first time period, which means that the transmitting end sends a reserved signal for transmitting the reserved signal in the first time period, and does not send the reserved signal at the switching time.
  • the communication method provided by the present application can prevent the transmission resource that completes the LBT interception from being preempted by other nodes by periodically transmitting the reserved signal on the transmission resource that completes the LBT interception, thereby improving the channel competition capability. problem.
  • the reserved signal is periodically transmitted on the transmission resource that completes the LBT interception, instead of transmitting the reserved signal (ie, the start time slot for transmitting data), the reserved signal is always sent, so that The transmission resource that completes the LBT interception may have the opportunity to perform the rollback, so that the transmission resource of the currently uncompleted LBT interception may complete the LBT interception before the transmission slot arrives, thereby increasing the transmission resource of the uncompleted LBT interception.
  • the opportunity to send data after the start of the start time slot thereby increasing system capacity.
  • the first time period duration and the second time period duration are determined according to priorities of data to be sent.
  • the transmission time of the reserved signal is 12 us
  • the duration of the first time period is 27 us
  • the duration of the second time period is 18 us.
  • the reservation period is 45us.
  • the reserved signal in the present application may be a short training filed (STF) signal, so that the WIFI node detects the signal.
  • the duration of the reserved signal can be the duration of the 15 STF signals. Among them, the length of each STF signal is 0.8us.
  • some of the first reservation operations in S620 in the case of j>1, determining that each transmission resource of the plurality of transmission resources that is currently not completing LBT interception is in the jth reservation
  • the channel state of the first time period in the cycle is used to perform the initial idle channel estimation CCA detection and/or the extended CCA detection, which may be specifically the following manner 1 or 2.
  • the channel detection is performed. The result is busy, determining that the channel state of the first transmission resource in the first time period in the jth reservation period is busy. Determining a channel state of the first transmission resource in a first time period of the jth reservation period if the channel detection result of the first transmission resource in the second time period of the j-1th reservation period is idle Is free.
  • the first transmission resource is any one of the transmission resources of the plurality of transmission resources that are not currently completed by the LBT.
  • the first transmission resource is considered to be the first time in the next reservation period.
  • the channel status within the segment is busy. If the first transmission resource that has not completed the rollback is in the second time period of the current reservation period, the detection result is idle. Then, it is considered that the channel state of the first transmission resource in the first time period in the next reservation period is idle. If the channel state is idle, the transmitting end may perform initial CCA detection and/or perform extended CCA detection according to the duration of the first time period and the duration of the second time period in the previous reservation period.
  • the transmitting end sends a signal in a first time period in each reservation period on the transmission resource that completes the LBT interception, in each reservation period on the transmission resource of the LBT that has not completed.
  • Channel detection is performed during the second time period.
  • the transmitting end sends a reserved signal on the LBT transmission resource.
  • the transmission end considers that the LBT transmission resource is not completed in the first time period due to the transmission resource leakage.
  • the channel status within is busy.
  • the transmitting end performs channel detection on the transmission resource that does not complete the LBT interception.
  • the channel state that the transmitting end considers that the transmission resource of the LBT interception is not completed in the first period of the second reservation period is also busy. If the channel detection result of the transmission resource of the uncompleted LBT interception is idle in the second time period of the second reservation period, the transmitting end considers that the transmission resource of the LBT interception is not completed in the third reserved period. The channel state of the first time period is also idle. If the channel detection result of the transmission resource of the uncompleted LBT interception is idle in the second time period of the third reservation period, the transmitting end considers that the transmission resource of the LBT interception is not completed in the fourth reserved period. The channel state of the first time period is also idle.
  • the transmission resource of the LBT interception is not completed in the second reservation period.
  • a total of 45 us of channel idle is detected in the first time period of the second time period and the third reserved period, so that the extended CCA detection can be entered, and the LBT is not completed after the end of the first time period in the third reserved period
  • the backoff random number of the intercepted transmission resource is decremented by 1. Since the channel state of the second time period is also idle, the transmission resource that has not completed the LBT interception can continue to roll back.
  • the reservation rule described in the first method can be referred to. If the length of the current reservation period and the start time slot is greater than the preset duration, if the LBT listening transmission resource can complete the LBT interception, the transmission resource of the LBT interception is not completed. The transmission signal that completes the LBT interception is completed to periodically transmit the reserved signal.
  • determining that the channel state of the first transmission resource in each of the plurality of transmission resources that is currently not completed for LBT interception is busy in the first time period in the jth reservation period . If the channel detection result of the first transmission resource in the second time period of the jth reservation period is idle, and the channel detection result in the second time period of the j-1th reservation period is idle, Setting the end of the jth reservation period corresponding to the backoff random number P to S1 is the duration of the first time period, S2 is the duration of the first time period, T1 is the detection period of the initial CCA, and T2 is the extended CCA detection period. Indicates rounding down.
  • the first transmission resource is any one of the transmission resources of the plurality of transmission resources that are not currently completed by the LBT.
  • the transmitting end sends a signal in a first time period in each reservation period on the transmission resource that completes the LBT interception, in each reservation period on the transmission resource of the LBT that has not completed.
  • Channel detection is performed during the second time period.
  • the transmitting end sends a reservation signal on the transmission resource of the completed LBT, and considers that the transmission resource of the LBT is not completed within the first time period in each reservation period.
  • the channel status is busy.
  • the transmitting end performs channel detection on the transmission resource that does not complete the LBT interception, and the channel detection result is busy, and the transmission resource that has not completed the LBT interception cannot be rolled back or Cannot continue to roll back.
  • the channel detection result of the transmission resource of the uncompleted LBT interception is idle in the second time period of the second reservation period and the second time period of the third reservation period, and the third end is in the third Set the backoff time to the end of the second time period in the reservation period
  • the initial CCA detection period T1 is 34 us and the extended CCA detection period T2 is 9 us, in FIG. 9, it is assumed that the transmission resource of the LBT interception is not completed in the first reservation period.
  • the backoff random number at the beginning of a time period is P. Since the channel detection result of the transmission resource that has not completed the LBT interception is busy in the first reservation period, the initial CCA detection is continued from the second reservation period.
  • the channel detection result of the second time period in the second reservation period is idle, since the duration of the second time period is 18 us, and the channel state of the first time period in the third reservation period is busy, Therefore, the backoff random number of the transmission resource that has not completed the LBT interception at the time when the first time period of the third reservation period ends is still P.
  • the channel detection result of the transmission resource that does not complete the LBT interception in the second time period in the second reservation period and the second time period in the third reservation period is idle, so the first time period may be added.
  • the channel idle state of the duration, so that the backoff P is the end of the second period of the third reservation period That is P-1.
  • the method may further include:
  • the data to be transmitted is transmitted on the i th transmission resource from the start time slot.
  • the duration between the end time of the second time period and the start time slot in the illustration is equal to the preset time length, and the transmission resource of the LBT interception is completed from the end time of the second time period.
  • Channel detection is performed on A and the transmission resource B on which the LBT is intercepted until the start time slot arrives. If the channel detection result of the transmission resource A that completes the LBT interception and the transmission resource B that completes the LBT interception is idle during the time period from the end time of the second time period to the start time slot, the start from the start At the beginning of the time slot, the transmitting end may transmit the data to be transmitted on the transmission resource A that completes the LBT interception and the transmission resource B that completes the LBT interception. If the channel detection result of the transmission resource A that completes the LBT interception is busy before the arrival of the start time slot, the sender needs to perform LBT interception again to compete for the transmission resource A.
  • the preset duration is equal to twice the duration of the reserved period. For example, when the reservation period is 45us, the preset duration can be 90us.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • the transmitting end uses the LAA Type B LBT mechanism for channel access.
  • the transmitting end in the method shown in FIG. 11 may be the network device 110 in the system 100 shown in FIG. 3, or may be any terminal device in the system 200 shown in FIG. 4, or may be the one shown in FIG. Any of the network devices in system 300.
  • S1110 Determine a start time slot of the primary channel in which the LBT listening is completed in multiple channels for transmitting data.
  • S1120 Performing the following second reservation operation from the first reservation period to the Nth reservation period after the primary channel completes the LBT interception.
  • the duration between the start time and the start time slot of the (N+1)th reservation period is less than the preset duration.
  • the second reservation operation is specifically: sending a reserved signal on the primary channel and on at least one of the plurality of channels in the first time period in the first reservation period, and in the first During the first time period in a reservation period, channel interception is not performed on each of the plurality of channels, and the first subchannel is in a second time period before the first time period and adjacent to the first time period The short listening time of the time is idle.
  • the primary channel and the short channel that is short-interviewed are idle.
  • the reserved signal is periodically transmitted until the time between the transmission time of the current reserved signal and the start time slot is less than the preset duration.
  • the period before the reserved signal is sent and the period after the reserved signal is sent are used for the uplink and downlink switching.
  • the two periods can be said to be the switching time.
  • the total duration of the switching time and the time at which the reserved signal is transmitted is the first time period.
  • channel listening is not performed on the subchannel that is currently short listening, or channel sensing is not performed on the multiple channels.
  • short listening is performed on the subchannel that is currently short listening. If the short listening result of a certain subchannel is idle, the reserved signal is transmitted on the subchannel in the first time period in each subsequent reservation period.
  • the transmitting end is in each reserved period.
  • the short listening result for the subchannel B is idle before the completion of the LBT listening before the primary channel A, it is possible to start from the time when the primary channel A completes the LBT listening, and when the reserved signal is transmitted on the primary channel A, A reserved signal is transmitted on subchannel B. Since the short listening results for the subchannels C and D are busy before the completion of the LBT listening before the primary channel A, the channels are not performed on the subchannels C and D during the first time period in each reserved period. Listening. In addition, channel sensing may not be performed on the primary channel A and the subchannel B during the first time period in each reservation period.
  • the second time period in the second reservation period continues in the child Short listening on channels C and D.
  • the short listening result on the subchannel C is idle, so in the first time period in the third reservation period, the transmitting end is on the primary channel A.
  • the reserved signal is transmitted on the subchannel B, the reserved signal is also transmitted on the subchannel C.
  • the short listening result on the subchannel C is busy, and in the second time period of the third reserved period, continuing on the subchannel D Perform short listening. If the time at which the third reservation period ends and the duration before the start time slot are greater than the preset duration greater than the preset duration, subsequent operations on each channel may refer to the above rules.
  • the communication method provided by the present application can avoid the primary channel and the short channel that is short to be idle as possible by periodically transmitting the reserved signal on the primary channel that completes the LBT listening and the short channel that is short-listening idle. It is preempted by other nodes, which can improve the problem of reduced channel competitiveness. Moreover, since the reserved signal is periodically transmitted on the primary channel and the short channel that is short to listen to idle, instead of transmitting the time slot (ie, the starting time slot for transmitting data), the reservation is always sent before the arrival. The signal makes it possible to access the short channel that is short-listened as busy, which can increase the chance that the short-listening busy sub-channel transmits data after the start time slot arrives, thereby increasing the system capacity.
  • the transmitting end transmits the reserved signal only for the time for transmitting the reserved signal in the first time period, and does not send the reserved signal during the switching time.
  • the first time period duration and the second time period duration are determined according to priorities of data to be sent.
  • the form of the reservation period may be as shown in FIG. 7 .
  • FIG. 7 For details, refer to the description of FIG. 7 above, and details are not described herein again.
  • the method may further include:
  • Channel interception is performed on at least one second channel from the end of the N+1th reservation period to the start time slot.
  • the at least one second channel includes the primary channel, the at least one first subchannel, and the short listening in the second time period in any of the N reservation periods and the Nth reservation period is idle.
  • the channel sounding result of the primary channel in the at least one second channel is idle when the initial time slot arrives, if the channel detection of any channel other than the primary channel in the at least one second channel The result of the listening is idle, starting from the starting time slot, transmitting data to be transmitted on the primary channel and any of the channels.
  • the sending end is Channel sensing is performed on each subchannel subchannel of the primary channel and the previous short listening idle. If the channel listening result of the primary channel is idle and the channel listening result of the subchannel is busy, the transmitting end may transmit the data to be transmitted on the primary channel from the starting time slot. If the channel listening result of the primary channel is idle, and the channel listening result of a certain subchannel is also idle, the transmitting end may transmit the to-be-sent together with the subchannel on the primary channel from the starting time slot. data.
  • the preset duration is equal to twice the duration of the reserved period. For example, when the reservation period is 45us, the preset duration can be 90us.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • FIG. 13 is a schematic flowchart of a communication method according to another embodiment of the present application.
  • the first communication device and the second communication device in the method shown in FIG. 13 may be network devices 150 and 160 in the system 300 shown in FIG. 5, respectively.
  • the second communication device performs channel access using the LBT mechanism shown in FIG. 1.
  • the first communications device After completing the LBT interception, the first communications device determines a starting time slot for transmitting data.
  • the first communications device performs the following third reservation operation from the first reservation period after completing the LBT interception to the Nth reservation period.
  • the duration between the start time and the start time slot of the (N+1)th reservation period is less than the preset duration.
  • the second communication device performs channel detection.
  • the second communications device performs LBT snooping according to the channel state.
  • the first communications device periodically sends the reserved signal until the current The duration between the sending time of the reserved signal and the starting time slot is less than the preset duration.
  • the period before the reserved signal is sent and the period after the reserved signal is sent are used for the uplink and downlink switching.
  • the two periods can be said to be the switching time.
  • the total duration of the switching time and the time at which the reserved signal is transmitted is the first time period.
  • the second communication device When performing the channel detection, the second communication device considers that the channel state is idle if the detected signal is a known reserved signal, and considers that the channel state is busy if the detected signal is an unknown signal.
  • the transmitting end continues the initial CCA detection or the extended CCA detection according to the channel status.
  • the first communication device can prevent the channel resources from being preempted by other nodes by periodically transmitting the reserved signal, thereby improving the problem of reduced channel competitiveness. Moreover, since the channel state when the known reserved signal is detected is regarded as idle when the second communication device performs channel detection, it is possible to increase the second communication device to transmit data after the start time slot arrives. Opportunity to increase system capacity.
  • the transmitting end transmits the reserved signal only for the time for transmitting the reserved signal in the first time period, and does not send the reserved signal during the switching time.
  • the first time period duration and the second time period duration are determined according to priorities of data to be sent.
  • the form of the reservation period may be as shown in FIG. 7 .
  • FIG. 7 For details, refer to the description of FIG. 7 above, and details are not described herein again.
  • the method may further include:
  • the first communication device performs channel detection from the end time of the Nth reservation period to the start time slot;
  • the first communications device sends data to be transmitted starting from the starting time slot.
  • the first communication starts from the (N+1)th reservation period to the start time slot.
  • the device performs channel sounding. If the channel listening result is idle, the first communication device can transmit the data to be transmitted from the start time slot.
  • channel detection is performed before the start time slot arrives. If the channel detection result is idle and then the data is transmitted, collision with other nodes can be avoided, and system performance can be improved.
  • FIG. 14 is a schematic block diagram of a communication device 1400 provided by an embodiment of the present application. As shown in FIG. 14, the communication device 1400 can include a processing unit 1410.
  • the processing unit 1410 is configured to: determine, in a plurality of transmission resources, a start time slot in which a transmission resource that first listens to the LBT and listens to the LBT is used to send data;
  • Channel detection is performed for each transmission resource of the plurality of transmission resources that is not currently performing LBT interception;
  • the first time period is adjacent to the second time period and does not overlap,
  • the processing unit 1410 is configured to: determine, in a plurality of channels, a start time slot for transmitting a data by using a primary channel that is said to be followed by an LBT to listen to;
  • the short-listening in the time period sends a reserved signal on each subchannel that is idle, and in the first time period in the jth in the reserved period, the channel state in the plurality of channels is not Channel listening for each channel that is busy;
  • the short listening is performed on each of the plurality of channels whose channel state is busy.
  • processing unit 1410 is configured to:
  • the starting time slot for transmitting data is determined
  • processing unit 1410 is configured to:
  • the signal detected by the second communications device is a reserved signal, determining that the channel state of the reserved signal transmission duration is idle;
  • the LBT is listened to after listening first.
  • the communication device 1400 may correspond to the transmitting end, the first communication device or the second communication device in the communication method of the foregoing embodiment of the present application, and the communication device 1400 may include a corresponding one in the foregoing embodiment of the present application.
  • the unit of the method performed by the main body is executed, and each unit in the communication device 1400 and the other operations and/or functions described above are respectively implemented in order to implement the corresponding flow of the communication method of the above-described embodiment of the present application.
  • the communication method in the foregoing embodiment has been described in detail, and is not described herein for brevity.
  • FIG. 15 shows a communication device 1500 provided by an embodiment of the present application.
  • the communication device can include a processor 1510, a transceiver 1520, and a memory 1530 that communicate with one another via internal connection paths.
  • the related functions implemented by the processing unit above may be implemented by the processor 1510, and the transmitting or receiving operations performed by the processing unit may be implemented by the processor 1510 controlling the transceiver 1520.
  • the processor 1510 may include one or more processors, for example, including one or more CPUs.
  • the processor may be a single core CPU or a multi-core CPU.
  • the transceiver 1520 is configured to transmit and receive data and/or signals, as well as to receive data and/or signals.
  • the transceiver can include a transmitter and a receiver for transmitting data and/or signals, and a receiver for receiving data and/or signals.
  • the memory 1530 includes, but is not limited to, a RAM, a ROM, an EPROM, a CD-ROM, and the memory 1530 is for storing related instructions and data.
  • the memory 1530 is used to store program code and data of the network device, and may be a separate device or integrated in the processor 1510.
  • the processor 1510 is configured to control a transceiver to perform information transmission with another communication device.
  • the processor 1510 is configured to control a transceiver to perform information transmission with another communication device.
  • Figure 15 only shows a simplified design of the communication device.
  • the communication device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all communication devices that can implement the present application are protected by the present application. Within the scope.
  • the communication device 1500 can be replaced with a chip device, such as a communication chip, for implementing the relevant functions of the processor 1510 in the communication device.
  • the chip device can be a field programmable gate array for implementing related functions, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, or a programmable controller or other integrated chip.
  • the chip may include one or more memories for storing program code that, when executed, causes the processor to perform the corresponding functions.
  • FIG. 16 is a schematic structural diagram of a terminal device 1600 according to an embodiment of the present application.
  • the terminal device 1600 can be adapted to perform the functions of the transmitting end in the above method embodiment in the system shown in FIG. 3 and FIG.
  • the terminal device 1600 can be a specific implementation of the communication device 1400 shown in FIG.
  • FIG. 16 shows only the main components of the terminal device.
  • the terminal device 1600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used for processing the communication protocol and the communication data, and controlling the entire terminal device, executing the software program, and processing the data of the software program, for example, for supporting the terminal device to perform the actions described in the foregoing method embodiments, such as Determine the random access preamble, the frequency position of the random access preamble, and the like.
  • the memory is mainly used to store software programs and data, such as storing preset rules and the like described in the above embodiments.
  • the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the control circuit together with the antenna can also be called a transceiver, and is mainly used for transmitting and receiving RF signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data 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.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • 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, which converts the baseband signal into data and processes the data.
  • FIG. 16 shows only one memory and one processor for ease of illustration. 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, and the like.
  • the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control and execute the entire terminal device.
  • the processor in FIG. 16 can integrate the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be 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 transceiving function can be regarded as the transceiving unit 1601 of the terminal device 1600, for example, for supporting the terminal device to perform the receiving function and the transmitting function as described in part in FIG. 6 or FIG. .
  • the processor having the processing function is regarded as the processing unit 1602 of the terminal device 1600.
  • the terminal device 1600 includes a transceiving unit 1601 and a processing unit 1602.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like.
  • the device for implementing the receiving function in the transceiver unit 1601 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 1601 is regarded as a sending unit, that is, the transceiver unit 1601 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.
  • the processor 1602 can be configured to execute instructions stored in the memory to control the transceiver unit 1601 to receive signals and/or transmit signals to perform the functions of the transmitting end in the foregoing method embodiments.
  • the function of the transceiver unit 1601 can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present disclosure, which may be a schematic structural diagram of a base station.
  • the base station is applicable to the system shown in FIG. 3 or FIG. 5, and performs the functions of the transmitting end, the first communications device, or the second communications device in the foregoing method embodiment.
  • the base station 1700 can include one or more radio frequency units, such as a remote radio unit (RRU) 1710 and one or more baseband units (BBUs) (also referred to as digital units, DUs). 1720.
  • RRU remote radio unit
  • BBUs baseband units
  • DUs digital units
  • the RRU 1710 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1711 and a radio frequency unit 1712.
  • the RRU 1710 portion is mainly used for transceiving radio frequency signals and converting radio frequency signals with baseband signals.
  • the BBU1720 part is mainly used for performing baseband processing, controlling a base station, and the like.
  • the RRU 1710 and the BBU 1720 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 1720 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, and the like.
  • the BBU (processing unit) 1720 can be used to control the base station to perform an operation procedure about the network device in the foregoing method embodiment.
  • the BBU 1720 may be composed of one or more boards, and multiple boards may jointly support a single access indication radio access network (such as an LTE network), or may support different access systems respectively. Radio access network (such as LTE network, 5G network or other network).
  • the BBU 1720 also includes a memory 1721 and a processor 1722 for storing the necessary instructions and data.
  • the memory 1721 stores the preset rule in the above embodiment.
  • the processor 1722 is configured to control the base station to perform necessary actions, for example, to control the base station to perform an operation procedure about the network device in the foregoing method embodiment.
  • the memory 1721 and the processor 1722 can serve one or more boards. That is, the memory and processor can be individually set 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.
  • the application also provides a communication system comprising one or more of the aforementioned network devices, and one or more terminal devices.
  • processors in the embodiment of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory in the embodiments of the present 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 a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory can be a random access memory (RAM) that acts as an external cache.
  • RAM random access memory
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic randomness synchronous dynamic randomness.
  • Synchronous DRAM SDRAM
  • DDR SDRAM double data rate synchronous DRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory Take memory
  • DR RAM direct memory bus random access memory
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-described embodiments may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer instructions or computer programs.
  • the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media.
  • the usable medium can be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium.
  • the semiconductor medium can be a solid state hard drive.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de communication et un dispositif de communication qui peuvent augmenter la capacité de système. Le procédé de communication consiste à : déterminer un intervalle de temps de départ, qui est utilisé pour envoyer des données, d'une ressource de transmission qui achève une interception LBT d'abord parmi une pluralité de ressources de transmission ; exécuter les opérations suivantes à partir d'une première période de réservation jusqu'à une nième période de réservation après qu'une ième ressource de transmission achève une interception LBT parmi des ressources de transmission achevant actuellement une interception LBT parmi la pluralité de ressources de transmission : envoyer un signal de réservation sur l'ième ressource de transmission dans une première période de temps dans une jème période de réservation ; déterminer l'état de canal d'une ressource de transmission qui n'a pas achevé actuellement une interception LBT dans une première période de temps dans la première période de réservation devant être occupée ; lorsque j = 1, déterminer l'état de canal de la ressource de transmission qui n'achève pas actuellement l'interception LBT dans la première période de temps dans la jème période de réservation ; et effectuer une détection de canal pour chaque ressource de transmission qui n'effectue pas actuellement une interception LBT pendant une seconde période de temps dans la jème période de réservation.
PCT/CN2019/080376 2018-03-30 2019-03-29 Procédé de communication et dispositif de communication Ceased WO2019185010A1 (fr)

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