WO2016187954A1 - Procédé et dispositif d'attribution de temps d'occupation de canal dans une bande de fréquences non autorisées - Google Patents

Procédé et dispositif d'attribution de temps d'occupation de canal dans une bande de fréquences non autorisées Download PDF

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Publication number
WO2016187954A1
WO2016187954A1 PCT/CN2015/085865 CN2015085865W WO2016187954A1 WO 2016187954 A1 WO2016187954 A1 WO 2016187954A1 CN 2015085865 W CN2015085865 W CN 2015085865W WO 2016187954 A1 WO2016187954 A1 WO 2016187954A1
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WIPO (PCT)
Prior art keywords
time
uplink
channel occupation
downlink
subframe
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PCT/CN2015/085865
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English (en)
Chinese (zh)
Inventor
李明菊
朱亚军
张云飞
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2016187954A1 publication Critical patent/WO2016187954A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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 invention relates to the field of communications technologies, and in particular, to a method and an apparatus for configuring an unlicensed frequency band channel occupation time.
  • LTE Assisted Access LTE
  • LTE Long Term Evolution
  • the WiFi technology on the unlicensed band eliminates interference between different WiFi devices through Carrier Sense Multiple Access/Collision Detection (CSMA/CA).
  • CSMA/CA Carrier Sense Multiple Access/Collision Detection
  • the WiFi device Before the data is sent, the WiFi device first listens. Whether the channel is idle, if the channel is idle, the backoff is performed, and when the backoff time ends, the user starts to send signaling or data.
  • 3GPP introduced a Listen Before Talk (LBT) mechanism in the LAA for monitoring and detecting LTE devices on unlicensed bands. Idle channel. The LBT mechanism monitors and detects the channel of the unlicensed band during the Clear Channel Assessment (CAA) time.
  • CAA Clear Channel Assessment
  • the terminal When detecting that the unlicensed band is idle, it starts to occupy the unlicensed band for data transmission.
  • the terminal learns the uplink and downlink channel occupation time to facilitate the terminal to transmit data or save power consumption.
  • the configuration of uplink and downlink subframes in the TDD system LTE system is complicated, and the uplink and downlink cannot use fixed channel occupation time.
  • the embodiment of the invention discloses a method for configuring an unlicensed band channel occupation time.
  • the user equipment UE
  • the user equipment can be configured according to the CCA time indication message and the uplink and downlink subframe configuration. Determining the uplink channel occupation time and the downlink channel occupation time, thereby performing data transmission in the uplink channel occupation time, receiving data in the downlink channel occupation time, and closing the receiver in the non-downlink channel occupation time to achieve the terminal saving power consumption. .
  • a first aspect of the embodiments of the present invention provides a method for configuring an unlicensed band channel occupation time, including:
  • the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time;
  • the method further includes:
  • the signaling message includes a radio resource control RRC message, a physical layer downlink control channel PDCCH signaling, or a channel reservation signal, the maximum channel
  • the occupied time includes the maximum uplink channel occupation time and the maximum downlink channel occupation time;
  • the determining, according to the subframe configuration and the CCA time indication message, determining a channel occupation time on an unlicensed frequency band including:
  • the continuous uplink transmission time includes an uplink pilot time slot UpPTS and a continuous uplink subframe after the UpPTS;
  • the continuous uplink transmission time after the start time of the uplink channel occupation time is set as the uplink channel occupation time.
  • the determining, according to the subframe configuration, the maximum channel occupation time, and the CCA time indication message, determining Channel occupation time on the licensed band including:
  • the continuous uplink transmission time includes an UpPTS and a continuous uplink subframe after the UpPTS;
  • the indication message of the uplink CCA time includes configuration information of an uplink CCA time and an uplink authorization permission
  • Determining, according to the indication message of the uplink CCA time, a start time of an uplink channel occupation time including:
  • the uplink CCA is started, and the uplink CCA is started.
  • the end time of the CCA time is set as the start time of the uplink channel occupation time.
  • the method further include:
  • the configuring and the The indication message of the CCA time determines the channel occupation time on the unlicensed frequency band, including:
  • the continuous downlink transmission time after the start time of the downlink channel occupation time is set as the downlink channel occupation time.
  • the determining, according to the subframe configuration, the maximum channel occupation time, and the CCA time indication message, determining Channel occupation time on the licensed band including:
  • the indication of the downlink CCA time reserves a signal for the channel;
  • Determining, according to the indication message of the downlink CCA time, a start time of a downlink channel occupation time including:
  • the time at which the channel reservation signal is received is set as the start time of the downlink channel occupation time.
  • the subframe configuration includes:
  • a second aspect of the embodiments of the present invention provides a terminal device, including:
  • a receiving unit configured to acquire a subframe configuration in a TDD LTE system
  • the receiving unit is further configured to receive an indication message of a CCA time of the unlicensed frequency band, where the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time;
  • a processing unit configured to determine, according to the subframe configuration and the CCA time indication message acquired by the receiving unit, a channel occupation time on an unlicensed frequency band, and perform data transmission and data reception according to the channel occupation time .
  • the receiving unit is further configured to:
  • the signaling message includes an RRC message, a PDCCH signaling, or a channel reservation signal, where the maximum channel occupation time includes a maximum uplink channel occupation time And the maximum downlink channel occupation time;
  • the processing unit is further configured to determine, according to the subframe configuration, the maximum channel occupation time, and the CCA time indication message received by the receiving unit, the channel on the unlicensed frequency band. The time is occupied, and data transmission and data reception are performed according to the channel occupation time.
  • the processing unit is specifically configured to:
  • the receiving unit obtaining, according to the subframe configuration obtained by the receiving unit, a continuous uplink transmission time in a radio frame in the subframe configuration;
  • the continuous uplink transmission time includes an uplink pilot time slot UpPTS and a continuous after the UpPTS Uplink subframe;
  • the continuous uplink transmission time after the start time of the uplink channel occupation time is set as the uplink channel occupation time.
  • the processing unit is specifically configured to:
  • the continuous uplink transmission time includes an UpPTS and a continuous uplink subframe after the UpPTS;
  • the uplink channel occupation time determines a maximum uplink channel occupation time termination time, and the continuous uplink transmission time between the start time of the uplink channel occupation time and the maximum uplink channel occupation time termination time is set as an uplink channel occupation time.
  • the indication message of the uplink CCA time received by the receiving unit includes configuration information of uplink CCA time and uplink Authorization permission; the processing unit is specifically used to:
  • the receiving unit When the receiving unit receives the uplink grant, if the uplink subframe indicated by the uplink grant permission and the uplink subframe indicated by the last uplink grant permission do not belong to consecutive uplink subframes in the subframe configuration, the uplink CCA is started, and The end time of the CCA time is set as the start time of the next uplink channel occupation time.
  • the processing unit is further configured to:
  • the processing unit is specifically configured to:
  • the continuous downlink transmission time after the start time of the downlink channel occupation time is set as the downlink channel occupation time.
  • the processing unit is specifically configured to:
  • the continuous downlink transmission time includes a continuous downlink subframe and the continuous downlink subframe DwPTS;
  • the continuous downlink transmission time between the channel occupation time termination times is set as the downlink channel occupation time.
  • the processing unit is configured to:
  • the time at which the channel reservation signal is received is set as the start time of the downlink channel occupation time.
  • the subframe configuration acquired by the receiving unit includes:
  • the UE can determine the channel occupation time on the unlicensed frequency band by acquiring the subframe configuration mode in the TDD LTE system and the indication message of receiving the CCA time of the unlicensed frequency band. That is, the maximum continuous uplink subframe after the start time of the uplink channel occupation time is determined by the indication message of the uplink CCA time and the subframe configuration manner, and is set as the uplink channel occupation time; the indication message and the subframe configuration manner by the downlink CCA time are adopted. The maximum consecutive uplink subframe after the start time of the downlink channel occupation time is determined, and is set as the downlink channel occupation time, so that data transmission and data reception are performed according to the uplink and downlink channel occupation time.
  • the maximum channel occupation time set by the base station is obtained by receiving the signaling message of the maximum channel occupation time, and the undefined frequency band is determined according to the maximum channel occupation time, the subframe configuration mode, and the CCA time indication message.
  • the channel on the time takes up.
  • the UE can determine the uplink channel occupation time, thereby smoothly performing uplink data transmission, and can determine the downlink channel occupation time, thereby turning off the receiver during the non-downlink channel occupation time, thereby saving power consumption.
  • FIG. 1 is a schematic diagram of a frame structure based LBT mechanism according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a load-based LBT mechanism according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for configuring an unlicensed band channel occupation time according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a frame structure of a TDD LTE system
  • FIG. 5 is a schematic diagram of a subframe configuration of a TDD LTE system
  • FIG. 6 is a schematic flowchart of another method for configuring an unlicensed band channel occupation time according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic flowchart of another method for configuring an unlicensed band channel occupation time according to Embodiment 3 of the present invention.
  • Figure 8-a is a schematic diagram of continuous uplink transmission time in subframe configuration 0;
  • FIG. 8-b is a schematic diagram of an uplink channel occupation time determined under a frame structure-based LBT mechanism
  • Figure 8-c is a schematic diagram of the uplink channel occupation time determined under the load-based LBT mechanism
  • FIG. 9 is a schematic diagram of another method for configuring an unlicensed band channel occupation time according to Embodiment 4.
  • FIG. 10 is a schematic diagram of another method for configuring an unlicensed band channel occupation time according to Embodiment 5; FIG.
  • 11 is a schematic diagram of downlink channel occupation time determined under a frame structure based LBT mechanism
  • FIG. 12 is a schematic diagram of another method for configuring an unlicensed band channel occupation time according to Embodiment 6;
  • 13-a is a schematic diagram of continuous downlink transmission time in subframe configuration 3;
  • 13-b is a schematic diagram of downlink channel occupation time determined under a load-based LBT mechanism
  • 13-c is a schematic diagram of another downlink channel occupation time determined under a load-based LBT mechanism
  • FIG. 14 is a schematic diagram of another method for configuring an unlicensed band channel occupation time according to Embodiment 7;
  • FIG. 15 is a schematic diagram of a terminal device according to Embodiment 8.
  • FIG. 16 is a schematic diagram of another terminal device provided in Embodiment 9.
  • LBT Listen Before Talk
  • a idle channel detection period includes CCA time, channel occupation time, and idle time, and the CCA time is at the beginning of each idle channel detection period.
  • the LTE device monitors whether the channel is idle during the CCA time before transmitting the data, and if the channel is idle to transmit data in the subsequent channel occupation time, releasing the channel during the idle time of the detection period; if the channel is busy during the CCA time Data cannot be sent during the subsequent channel occupation time.
  • the CCA time occupies one or more symbols of the subframe. As shown in FIG. 1, the CCA starts with the first symbol of subframe 0.
  • the idle channel detection of the LTE device has no fixed period, and the idle channel detection is performed only when there is data transmission.
  • the LTE device Before transmitting data, the LTE device immediately monitors whether the channel is idle at the next available initial CCA time. If the channel is idle, it transmits data in the subsequent channel occupation time, otherwise it does not transmit data; if the channel is monitored at the initial CCA time If the data is not busy or the data is not transmitted within the channel occupation time, the CCA time is extended, and the channel is detected to be idle during each extended CCA time interval.
  • the extended CCA time interval is the same as the initial CCA time length. If the channel is detected to be idle, record once.
  • N is an integer from 1 to q, where q is the contention window length of the extended CCA time, greater than or equal to 4 and less than or equal to 32.
  • the embodiment of the present invention discloses a method for configuring an unlicensed band channel occupation time.
  • the technical solution provided by the embodiment of the present invention can enable the UE to determine according to the start time of the uplink channel occupation time and the uplink and downlink subframe configuration of the TDD system.
  • the uplink channel occupies time, thereby performing data transmission; or the UE may determine the downlink of the base station to send data to the UE according to the start time of the downlink channel occupation time of the base station to send data to the UE and the uplink and downlink subframe configuration of the TDD system.
  • the channel takes up time, and the receiver is turned off during the non-downstream channel occupation time, thereby realizing the terminal to save power consumption.
  • FIG. 3 is a schematic flowchart of a method for configuring an unlicensed band channel occupation time according to an embodiment of the present invention. As shown in FIG. 3, the method provided in Embodiment 1 of the present invention may include the following steps:
  • the base station and the terminal determine the location of the uplink and downlink subframes according to the subframe configuration manner.
  • the frame structure of the TDD LTE system is shown in Figure 4.
  • the 10ms radio frame consists of two fields, the half frame length is 5ms, each field frame contains 5 subframes, and the subframe length is 1ms.
  • Each subframe can be used for uplink or Downlink transmission.
  • the TDD LTE system has multiple uplink and downlink subframe configuration ratios, that is, multiple subframe configuration modes, which can be divided into a subframe configuration mode of 5 ms period and a subframe configuration mode of 10 ms.
  • subframe 1 and subframe 6 are special subframes, and in a subframe configuration of a 10 ms period, subframe 1 is a special subframe.
  • Each special subframe is composed of DwPTS, UpPTS, and Guard Period (GP) for uplink and downlink transmission.
  • DwPTS is used for downlink transmission
  • UpPTS is used for uplink transmission.
  • a total of 6 seed frames are configured as shown in Figure 5, where "D" indicates a downlink subframe and "U” indicates an uplink subframe. , "S" indicates a special subframe.
  • the base station notifies the UE in the cell by the transmission system broadcast, and the UE obtains the subframe configuration mode used by the base station after receiving the system broadcast, thereby obtaining the position of the uplink and downlink subframe in each radio frame.
  • the flexible TDD configuration may be performed according to the state of the service arrival, and each subframe in the subsequent one or more radio frames is an uplink subframe or a downlink subframe according to the service arrival state, such that the radio frame
  • the uplink and downlink subframes do not necessarily appear in the subframe configuration mode preset by the above six LTE systems.
  • the base station may configure all the subframes in the next radio frame as downlink subframes, and the base station may send the configuration to the UE in the cell through system broadcast. After receiving the system broadcast, the UE can obtain the uplink and downlink subframe positions set by the base station.
  • S102 Receive an indication message of a CCA time of an unlicensed frequency band, where the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time.
  • the UE can obtain the CCA time for detecting the unlicensed channel by receiving the indication message of the unlicensed band CCA time sent by the base station.
  • the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time.
  • the UE obtains the CCA time of the unlicensed frequency band by the UE by using the indication message of the uplink CCA time, and obtains the CCA time of the unlicensed frequency band by the base station by using the indication message of the downlink CCA time.
  • the TDD LTE system can adopt a frame structure based LBT mechanism and a load based LBT mechanism on an unlicensed frequency band.
  • the CCA time has a fixed period, and the CCA time can be determined by the CCA time length, the CCA time offset, and the CCA time period.
  • the subframe in which the CCA time is located can be determined by the following formula: When the frame number and the subframe number satisfy the formula, the CCA time occurs:
  • N CCA_Cycle is the CCA time period
  • N CCA_Offset is the subframe offset of the CCA time
  • the configuration information of the CCA time is determined by the base station, and includes: a CCA time length, a CCA time subframe offset, and a CCA time period.
  • the CCA time of the UE may be configured on the GP of the special subframe, the UpPTS of the special subframe, or the uplink subframe, and the CCA time of the base station may be configured in the DwPTS, the downlink subframe, or the next downlink subframe of the special subframe.
  • the base station sends the configuration information of the CCA time to the UE by using an indication message of the CCA time.
  • the UE obtains the configuration information of the CCA time from the indication message of the CCA time, and determines the starting time of the CCA time of each period by using the above formula.
  • the base station may send the indication message of the uplink CCA time and the indication message of the downlink CCA time to the UE in the same Radio Resource Control (RRC) reconfiguration message; the base station may also place the indication message of the uplink CCA time.
  • RRC Radio Resource Control
  • the RRC reconfiguration message is sent to the UE, and the indication message of the downlink CCA time is sent to the UE in the system broadcast.
  • the UE can obtain the CCA time for the UE to detect the unlicensed band, and the CCA time for the base station to detect the unlicensed band.
  • the base station sends an uplink grant (Uplink Grant) signaling to inform the UE of the resource location of the uplink data and triggers the UE to initiate idle channel detection.
  • Uplink Grant uplink grant
  • the initial CCA time length, the initial CCA time start time, the channel occupation time length, and the extended CCA time contention window length q where q is an integer greater than or equal to 4 and less than or equal to 32
  • the CCA time of the licensed band, the CCA time includes the initial CCA time and the extended CCA time.
  • the UE randomly selects an integer N between 1 and q.
  • N is subtracted by 1, otherwise N is unchanged.
  • N is reduced to 0, the extended CCA time is over, and the channel is entered. Take up time and start sending data.
  • the configuration information of the CCA time of the UE is determined by the base station, and includes: an initial CCA time length and a contention window length q of the extended CCA time.
  • the base station sends the configuration information of the CCA time to the UE by using an RRC reconfiguration message, and the UE obtains the configuration information of the CCA time.
  • the base station sends the Uplink Grant signaling to inform the UE to send the resource location of the uplink data and trigger the UE to start detecting the idle channel, that is, start the initial CCA time, and the initial CCA time and the extended CCA time may be located in the GP and the special sub-frame of the special subframe. UpPTS or uplink subframe of the frame.
  • the indication message of the uplink CCA time includes an RRC reconfiguration message carrying CCA time configuration information and the Uplink Grant signaling.
  • the CCA time of the base station may be located in the DwPTS of the special subframe, the downlink subframe, or the uplink subframe immediately next to the downlink subframe.
  • the channel may be reserved by using a reservation signal (Reservation Signal).
  • the Reservation Signal occupies one or several symbols of a downlink subframe, and after receiving the Reservation Signal, the UE can know a certain symbol or the next nearest downlink of the current downlink subframe that receives the Reservation Signal.
  • the frame base station starts to occupy the channel to transmit downlink data. Therefore, under the load-based LBT mechanism, the indication information of the downlink CCA time refers to the Reservation Signal.
  • S103 Determine, according to the subframe configuration and the indication message of the CCA time, a channel occupation time on an unlicensed frequency band, thereby performing data transmission and data reception according to the channel occupation time.
  • the method for determining the occupation time of the uplink channel specifically includes:
  • the UE may determine a location in which uplink transmission is possible in each radio frame, thereby obtaining continuous uplink transmission time in the radio frame in the subframe configuration mode, and the continuous uplink transmission time includes UpPTS in the special subframe and consecutive uplink subframes after the UpPTS.
  • the start time of the uplink channel occupation time can be determined.
  • the UE can know the specific location of the CCA time that occurs in each cycle by using the configuration information of the uplink CCA time.
  • the UE receives the Uplink Grant, if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the last Uplink Grant do not belong to consecutive uplink subframes in the subframe configuration, the uplink subframe indicated by the Uplink Grant is located.
  • the idle channel detection is initiated by the latest CCA time before the consecutive uplink subframe, and the end time of the CCA time is set as the start time of the next uplink channel occupation time; if the uplink subframe indicated by the Uplink Grant is the last time
  • the uplink subframe indicated by the Uplink Grant belongs to the contiguous uplink subframe in the subframe configuration, and indicates that the idle channel detection is triggered when the last Uplink Grant indication is received, and the uplink subframe indicated by the current Uplink Grant belongs to the channel after the idle channel detection. Occupied time, so this Uplink Grant does not need to trigger idle channel detection.
  • the UE when the UE receives the UpLink Grant signaling, if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the previous Uplink Grant do not belong to consecutive uplink subframes in the subframe configuration, Then, the idle channel detection is started in the latest guard interval GP, UpPTS, or uplink subframe before the consecutive uplink subframe in which the uplink subframe indicated by the uplink grant is located, and the initial CCA is started, and the end time of the CCA time is set as the next uplink.
  • the start time of the channel occupation time if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the last Uplink Grant belong to the continuous uplink in the subframe configuration
  • the sub-frame indicates that the idle channel detection is triggered when the last Uplink Grant indication is received, and the uplink subframe indicated by the Uplink Grant belongs to the channel occupation time after the idle channel detection. Therefore, the Uplink Grant does not trigger the idle channel detection.
  • the extended CCA is started, and when the extended CCA time ends, it is the starting time of the next uplink channel occupation time.
  • the continuous uplink transmission time after the start time of the uplink channel occupation time is set as the uplink channel occupation time.
  • the UpPTS after the GP and the subsequent uplink subframes are set as the uplink channel occupation time; when the CCA time is in the UpPTS time slot, the CCA time is remaining.
  • the UpPTS and the uplink subframe after the UpPTS are set to the uplink channel occupation time.
  • the method for determining the downlink channel occupation time specifically includes:
  • the UE determines a location in which downlink transmission can be performed in each radio frame, thereby obtaining continuous downlink transmission time in the radio frame in the subframe configuration mode, and the continuous downlink transmission time.
  • the continuous downlink subframe and the DwPTS after the consecutive downlink subframe are included.
  • the start time of the downlink channel occupation time can be determined.
  • the UE can know the specific location of the CCA time of the base station by using the configuration information of the downlink CCA time, and the start time of the downlink channel occupation time of the base station at the end of each CCA time.
  • the UE receives the Reservation Signal it is known that the base station will use the subsequent downlink subframe to send downlink data to the UE, and the moment when the Reservation Signal is received is the start time of the downlink channel occupation time.
  • the continuous downlink transmission time after the start time of the downlink channel occupation time obtained above is set as the downlink channel occupation time.
  • the DwPTS from the time when the Reservation Signal is received to the subsequent DwPTS is set as the downlink channel occupation time; when the UE receives the Reservation Signal in a downlink subframe, it will receive from the receiver.
  • the current downlink subframe from the Reservation Signal to the subsequent DwPTS is set to the downlink channel occupation time.
  • the UE may send data during the uplink channel occupation time.
  • the receiver may be turned on to receive downlink data.
  • the UE can be configured according to the uplink channel.
  • the start time of the occupied time and the uplink and downlink subframe configuration of the TDD system determine the uplink channel occupation time to perform data transmission; or the UE may according to the start time of the downlink channel occupation time and the TDD system that the base station is to send data to the UE
  • the uplink and downlink subframe configuration determines the downlink channel occupation time that the base station is to send data to the UE, and turns off the receiver during the non-downlink channel occupation time, thereby realizing the terminal to save power consumption.
  • FIG. 6 is a schematic flowchart of Embodiment 2 of the present invention. step:
  • the base station notifies the UE in the cell by the transmission system broadcast, and the UE obtains the subframe configuration mode used by the base station after receiving the system broadcast, thereby obtaining the position of the uplink and downlink subframe in each radio frame. For example, if the system uses subframe configuration 0, the UE knows that the uplink and downlink attributes from subframe 0 to subframe 9 are DSUUUDSUUU, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.
  • the flexible TDD configuration may be performed according to the state of the service arrival, and each subframe in the subsequent one or more radio frames is an uplink subframe or a downlink subframe according to the service arrival state, such that the radio frame
  • the uplink and downlink subframes do not necessarily appear in the subframe configuration mode preset by the six LTE systems.
  • the base station may configure all the subframes in the next radio frame as downlink subframes, and the base station may send the configuration to the UE in the cell through system broadcast.
  • the UE can know that the uplink and downlink attributes of the subframe 0 to the subframe 9 set by the base station are DDDDDDDDDD, where D represents a downlink subframe.
  • S202 Receive an indication message of a CCA time of an unlicensed frequency band, where the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time.
  • the UE can obtain the CCA time for detecting the unlicensed channel by receiving the indication message of the unlicensed band CCA time sent by the base station.
  • the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time.
  • the UE obtains the CCA time of the unlicensed frequency band by the UE by using the indication message of the uplink CCA time, and obtains the CCA time of the unlicensed frequency band by the base station by using the indication message of the downlink CCA time.
  • the configuration information of the CCA time includes: the length of the CCA time, CCA time subframe offset, CCA time period.
  • the CCA time of the UE may be configured on the GP of the special subframe, the UpPTS of the special subframe, or the uplink subframe, and the CCA time of the base station may be configured in the DwPTS, the downlink subframe, or the next downlink subframe of the special subframe.
  • the base station sends the configuration information of the CCA time to the UE by using an indication message of the CCA time.
  • the UE can determine the location of the CCA time for each cycle.
  • the base station sends the indication message of the uplink CCA time and the indication message of the downlink CCA time to the UE in the same RRC reconfiguration message; the base station may also send the indication message of the uplink CCA time in the RRC reconfiguration message to the UE, and The indication message of the downlink CCA time is sent to the UE in the system broadcast.
  • the UE can obtain the CCA time for the UE to detect the unlicensed band, and can also obtain the CCA time for the base station to detect the unlicensed band.
  • the base station informs the UE to send the resource location of the uplink data by sending an Uplink Grant signaling, and triggers the UE to initiate idle channel detection.
  • the configuration information of the CCA time of the UE includes: an initial CCA time length and a contention window length q of the extended CCA time.
  • the base station sends the configuration information of the CCA time of the UE to the UE through the RRC reconfiguration message, and the UE obtains the configuration information of the CCA time.
  • the base station sends the Uplink Grant signaling to inform the UE to send the resource location of the uplink data and trigger the UE to start detecting the idle channel, that is, start the initial CCA.
  • the initial CCA time and the extended CCA time may be located in the GP of the special subframe, the UpPTS of the special subframe, or the uplink subframe.
  • the indication message of the uplink CCA time includes an RRC reconfiguration message carrying CCA time configuration information and the Uplink Grant signaling.
  • the CCA time of the base station may be located in the DwPTS of the special subframe, the downlink subframe, or the uplink subframe immediately next to the downlink subframe.
  • the reporting may be performed by sending a Reservation Signal to indicate that the UE base station will use the subsequent
  • the downlink subframe transmits downlink data to the UE, and the Reservation Signal occupies one or several symbols of a downlink subframe, and after receiving the Reservation Signal, the UE can know that a certain symbol or the current downlink subframe of the Reservation Signal is received.
  • a recent downlink subframe base station starts to occupy the channel to transmit downlink data.
  • the indication information of the downlink CCA time refers to the Reservation Signal.
  • S203 Receive a signaling message indicating a maximum channel occupation time to obtain a maximum channel occupation time.
  • the base station can send the maximum uplink channel occupation time and the maximum downlink channel occupation time to the UE through the system broadcast, the RRC message, or the PDCCH signaling, and can also indicate the maximum downlink channel occupation time to the UE through the Reservation Signal, that is, the scrambling code through different Reservation Signals. And different The number of symbols occupied by the Reservation Signal indicates different maximum downlink channel occupation time. After the UE detects that the unlicensed band is idle, the time that the occupied channel sends the uplink data does not exceed the maximum uplink channel occupation time. At the same time, the UE knows that the time when the base station occupies the channel to send the downlink data does not exceed the maximum downlink channel occupation time.
  • S204 Determine, according to the foregoing subframe configuration, the maximum channel occupation time, and the CCA time indication message, the channel occupation time on the unlicensed frequency band, and perform data transmission and data reception according to the channel occupation time.
  • the method for determining the occupation time of the uplink channel specifically includes:
  • the UE may determine a location in which uplink transmission is possible in each radio frame, thereby obtaining continuous uplink transmission time in the radio frame in the subframe configuration mode, and the continuous uplink transmission time includes UpPTS in the special subframe and consecutive uplink subframes after the UpPTS.
  • the start time of the uplink channel occupation time can be determined.
  • the UE can know the specific location of the CCA time that occurs in each cycle by using the configuration information of the uplink CCA time.
  • the UE receives the Uplink Grant, if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the last Uplink Grant do not belong to consecutive uplink subframes in the subframe configuration, the uplink subframe indicated by the Uplink Grant is located.
  • the idle channel detection is initiated by the latest CCA time before the consecutive uplink subframe, and the end time of the CCA time is set as the start time of the next uplink channel occupation time; if the uplink subframe indicated by the Uplink Grant is the last time
  • the uplink subframe indicated by the Uplink Grant belongs to the contiguous uplink subframe in the subframe configuration, and indicates that the idle channel detection is triggered when the last Uplink Grant indication is received, and the uplink subframe indicated by the current Uplink Grant belongs to the channel after the idle channel detection. Occupied time, so this Uplink Grant does not need to trigger idle channel detection.
  • the UE when the UE receives the UpLink Grant signaling, if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the previous Uplink Grant do not belong to consecutive uplink subframes in the subframe configuration, Then, the idle channel detection is started in the latest guard interval GP, UpPTS, or uplink subframe before the consecutive uplink subframe in which the uplink subframe indicated by the uplink grant is located, and the initial CCA is started, and the end time of the CCA time is set as the next uplink.
  • the start time of the channel occupation time if the uplink subframe indicated by the Uplink Grant and the uplink subframe indicated by the last Uplink Grant belong to the continuous uplink in the subframe configuration
  • the sub-frame indicates that the idle channel detection is triggered when the last Uplink Grant indication is received, and the uplink subframe indicated by the Uplink Grant belongs to the channel occupation time after the idle channel detection. Therefore, the Uplink Grant does not trigger the idle channel detection.
  • the extended CCA is started, and when the extended CCA time ends, it is the starting time of the next uplink channel occupation time.
  • the maximum uplink channel occupation time termination time is determined according to the determined start time of the uplink channel occupation time and the maximum uplink channel occupation time obtained in step 203, and starting the uplink channel occupation time and the maximum uplink channel occupation time termination time.
  • the continuous uplink transmission time between the two is set to the uplink channel occupation time. For example, if the CCA time is in the GP of the special time slot, the maximum uplink channel occupation time is 2 ms, and the 2 ms time after the GP is set as the maximum uplink channel occupation time termination time, and the continuous uplink transmission time within 2 ms is set. Takes time for the upstream channel.
  • the method for determining the downlink channel occupation time specifically includes:
  • the UE determines a location where downlink transmission can be performed in each radio frame, thereby obtaining continuous downlink transmission time in the radio frame in the subframe configuration mode, and the continuous downlink transmission time.
  • the continuous downlink subframe and the DwPTS after the consecutive downlink subframe are included.
  • the start time of the downlink channel occupation time can be determined.
  • the UE can know the specific location of the CCA time of the base station by using the configuration information of the downlink CCA time, and the start time of the downlink channel occupation time of the base station at the end of each CCA time.
  • the UE receives the Reservation Signal it is known that the base station will use the subsequent downlink subframe to send downlink data to the UE, and the moment when the Reservation Signal is received is the start time of the downlink channel occupation time.
  • Determining the maximum downlink channel occupation time termination time according to the determined start time of the downlink channel occupation time and the maximum downlink channel occupation time obtained in step 203, and starting the downlink channel occupation time and the maximum downlink channel occupation time termination time
  • the continuous downlink transmission time between the two is set as the downlink channel occupation time. For example, in the LBT mechanism based on the frame structure, if the UE learns that the downlink CCA time is in the uplink subframe before the downlink subframe, the start time of the downlink subframe is the start time of the downlink channel occupation time, If the maximum downlink channel occupation time is 2 ms, set the maximum downlink channel occupation at 2 ms after the start time of the downlink channel occupation time.
  • the continuous downlink transmission time within 2 ms is set as the downlink channel occupation time; for example, in the load-based mechanism, when the UE receives the Reservation Signal in a downlink subframe, the time when the Reservation Signal is received
  • the downlink channel occupation time start time if the maximum channel occupation time indicated by the Reservation Signal is 2 ms, and the 2 ms time after the start time of the downlink channel occupation time is set as the maximum downlink channel occupation time termination time, the 2ms within the 2ms
  • the continuous downlink transmission time is set as the downlink channel occupation time.
  • the UE may send data during the uplink channel occupation time.
  • the receiver may be turned on to receive downlink data.
  • the second embodiment of the present invention limits the channel occupation time by using the maximum channel occupation time, so that the UE according to the start time of the uplink channel occupation time, the maximum uplink channel occupation time, and the uplink and downlink subframes of the TDD system.
  • the configuration is performed to determine the uplink channel occupation time, so as to perform data transmission; or the UE may determine, according to the start time of the downlink channel occupation time, the maximum uplink channel occupation time, and the uplink and downlink subframe configuration of the TDD system, that the base station is to send data to the UE.
  • the base station will send the downlink channel occupation time of the data to the UE, and the receiver is turned off during the non-downlink channel occupation time, thereby realizing the terminal to save power consumption.
  • the third embodiment provides a method for configuring an unlicensed band channel occupation time for the UE to determine an uplink channel occupation time.
  • the method may include the following steps:
  • the base station notifies the UE in the cell by the transmission system broadcast, and the UE obtains the subframe configuration mode used by the base station after receiving the system broadcast, thereby obtaining the position of the uplink and downlink subframe in each radio frame.
  • the subframe used by the system is configured as the subframe configuration 0.
  • the uplink and downlink attributes from the subframe 0 to the subframe 9 are DSUUUDSUUU.
  • S302. Receive configuration information of an uplink CCA time of an unlicensed band and an uplink grant signaling.
  • the configuration information of the uplink CCA time includes a CCA time length, a CCA time subframe offset, and a CCA time period.
  • the base station may configure the CCA time of the UE on the GP of the special subframe, the UpPTS or the uplink subframe of the special subframe, and then send the configuration information of the CCA time to the UE by using a downlink signaling message.
  • the UE may determine the start time of the CCA time of each period according to the configuration information of the uplink CCA time. For example, the CCA time is configured in the GP of the special subframe, the CCA time length is 20 us, the CCA time period is configured to be 5 ms, and the uplink is received.
  • the UE After the CCA configuration information, the UE knows that each possible CCA time is 20us in the GP before the start of the UpPTS of each field. After receiving the Uplink Grant, the UE starts the idle channel detection. If the UE receives the Uplink Grant signaling for the subframe 2 in the subframe 6, the idle channel detection should be started at the latest CCA time before the subframe 2, that is, in the subframe 1. The idle channel detection is performed in the GP.
  • the configuration information of the uplink CCA time includes: an initial CCA time length, and a contention window length q of the extended CCA time.
  • the base station sends the configuration information of the uplink CCA time to the UE through the RRC reconfiguration message, and the UE obtains the configuration information of the CCA time.
  • the base station sends the Uplink Grant signaling to inform the UE to send the resource location of the uplink data and trigger the UE to start detecting the idle channel, that is, start the initial CCA.
  • the initial CCA time and the extended CCA time may be located in the GP of the special subframe, the UpPTS of the special subframe, or the uplink subframe.
  • the initial CCA time is configured to be 20 us, and the contention window length of the extended CCA time is 4.
  • the UE After receiving the Uplink Grant, the UE starts the initial CCA. If the UE receives the Uplink Grant signaling for the subframe 2 in the subframe 6, the idle channel detection should be performed on the nearest GP, UpPTS or uplink subframe before the subframe 2, that is, The idle channel detection is performed at the beginning of the GP of subframe 1.
  • the UE may determine the location of the uplink subframe, thereby obtaining the continuous uplink transmission time in the subframe configuration, and the continuous uplink transmission time includes the UpPTS in the special subframe and the UpPTS after the UpPTS.
  • Continuous uplink subframes As shown in FIG. 8-a, according to the subframe configuration 0, the continuous uplink transmission time includes the UpPTS in each special subframe and the subsequent consecutive 3 uplink subframes.
  • the idle channel detection is started in the latest CCA time before the consecutive uplink subframes in the subframe configuration in which the uplink subframe indicated by the Uplink Grant signaling is located, and the CCA time is ended.
  • the time is set as the starting time of the uplink channel occupation time.
  • the CCA time is configured in the GP of the special subframe, the CCA time length is 20 us, and the CCA time period is configured to be 5 ms, so that each possible CCA of the UE is known.
  • the time is 20us in the GP before the start of the UpPTS for each special subframe.
  • the UE receives the Uplink Grant signaling for the subframe 2 in the subframe 6, and therefore the GP in the subframe 1.
  • the idle channel detection is performed, and the idle channel detection end time, that is, the start time of the UpPTS of the subframe 1 is set as the start time of the uplink channel occupation time.
  • the initial CCA time is configured to be 20us, and the initial CCA is started after the UE receives the Uplink Grant, if the UE receives the Uplink to the subframe 2 in the subframe 6. Grant signaling, the initial CCA should be started at the next possible CCA time, that is, the initial CCA is started at the start of the GP of the subframe 1, and the 20us after the start of the GP is set as the start time of the uplink channel occupation time.
  • the start time of the uplink channel occupation time is the start time of the UpPTS of the subframe 1, and will start from the UpPTS of the subframe 1 to the subsequent 3
  • the consecutive uplink subframes are set to the uplink channel occupation time.
  • the start time of the uplink channel occupation time is 20us time after the start of the GP, and the three consecutive uplink subframes from the time to the subsequent consecutive times are set. It is determined as the uplink channel occupation time.
  • the UE may perform the indication message according to the uplink CCA time and the uplink and downlink subframe of the TDD system in the frame structure-based LBT mechanism or the load-based LBT mechanism. Configuration, determining the uplink channel occupation time, thereby performing data transmission.
  • a further embodiment of the present invention provides a method for configuring an unlicensed band channel occupation time for the UE to determine an uplink channel occupation time.
  • FIG. 9 is a schematic flowchart of Embodiment 4 of the present invention. The method provided in Embodiment 4 of the present invention includes the following steps:
  • the subframe used by the setting system is configured as the subframe configuration 0.
  • the uplink and downlink attributes from the subframe 0 to the subframe 9 are DSUUUDSUUU.
  • S402. Receive configuration information of an uplink CCA time of an unlicensed band and an uplink grant signaling.
  • the CCA time is configured in the GP of the special subframe, the CCA time length is 20 us, and the CCA time period is configured to be 5 ms.
  • the UE After receiving the uplink CCA configuration information, the UE knows that each Possible CCA time is located in the UpPTS of each field 20us in the GP before the start. The UE may trigger idle channel detection after receiving the Uplink Grant.
  • the UE may determine the location of the uplink subframe, thereby obtaining the continuous uplink transmission time in the subframe configuration, and the continuous uplink transmission time includes the UpPTS in the special subframe and the UpPTS after the UpPTS.
  • Continuous uplink subframes As shown in FIG. 8-a, according to the subframe configuration 0, the continuous uplink transmission time includes the UpPTS in each special subframe and the subsequent consecutive 3 uplink subframes.
  • S404 Determine whether the uplink subframe indicated by the current uplink grant and the uplink subframe indicated by the last uplink grant belong to consecutive uplink subframes in the subframe configuration.
  • the UE receives the Uplink Grant signaling for the subframe 2 and receives the Uplink Grant signaling for the subframe 9 last time.
  • the UE determines the subframe 2 and the last authorization signaling indicated by the current authorization signaling. Whether the indicated subframe 9 belongs to consecutive uplink subframes in the subframe configuration.
  • the sub-frame 2 and the sub-frame 9 do not belong to consecutive uplink sub-frames, that is, the uplink sub-frame indicated by the current Uplink Grant and the uplink sub-frame indicated by the last Uplink Grant do not belong to consecutive uplink sub-frames in the sub-frame configuration. Therefore, the Uplink Grant needs to trigger the idle channel detection, and the idle channel detection is started in the latest CCA time before the consecutive subframes where the subframe 2 is located, that is, the idle channel detection is performed in the GP of the subframe 1, and the idle channel detection is performed.
  • the end time, that is, the start time of the UpPTS of the subframe 1 is set as the start time of the channel occupation time.
  • the UE receives the Uplink Grant signaling for the subframe 3, the subframe 3 and the subframe 2 belong to consecutive uplink subframes in the subframe configuration, and the UE has started the idle channel when receiving the Uplink Grant for the subframe 2. Detection, and subframe 3 and subframe 2 belong to the same channel occupation time, so the idle channel detection is not triggered when the Uplink Grant for subframe 3 is received.
  • the continuous uplink transmission time after the start time of the uplink channel occupation time is set as the uplink channel occupation time.
  • the start time of the uplink channel occupation time is subframe 1
  • the start time of the UpPTS is set from the UpPTS of the subframe 1 to the subsequent 3 consecutive uplink subframes as the uplink channel occupation time.
  • the fifth embodiment provides a method for configuring an unlicensed band channel occupation time, which is used by the UE to determine a downlink channel occupation time under a frame structure-based LBT mechanism, as shown in FIG. 10 and FIG.
  • a schematic flowchart of Embodiment 5 of the present invention, the method provided in Embodiment 5 of the present invention includes the following steps:
  • the base station notifies the UE in the cell by the transmission system broadcast, and the UE obtains the subframe configuration mode used by the base station after receiving the system broadcast, thereby obtaining the position of the uplink and downlink subframe in each radio frame. For example, if the system uses subframe configuration 3, the UE can know that the uplink and downlink attributes from subframe 0 to subframe 9 are DSUUUDDDDD, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.
  • the flexible TDD configuration may be performed according to the state of the service arrival, and each subframe in the subsequent one or more radio frames is an uplink subframe or a downlink subframe according to the service arrival state, such that the radio frame
  • the uplink and downlink subframes in the medium do not necessarily appear in the subframe configuration 3.
  • the configuration information of the downlink CCA time includes: a CCA time length, a CCA time subframe offset, and a CCA time period.
  • the downlink CCA time may be configured in a DwPTS of a special subframe, a downlink subframe, or an uplink subframe immediately next to the downlink subframe.
  • the base station sends the configuration information of the CCA time to the UE by using an indication message of the CCA time.
  • the UE may determine the start time of the CCA time for each cycle. For example, the CCA time is configured in the uplink subframe 4, the CCA time length is 20 us, and the CCA time period is 10 ms.
  • the indication message of the downlink CCA time may be an RRC reconfiguration message or a system broadcast message. After receiving the downlink CCA configuration information, the UE knows that each possible CCA time is located in the subframe 4 of each radio frame.
  • the UE determines a location in which downlink transmission is possible in each radio frame, thereby obtaining a continuous downlink transmission time in the radio frame in the subframe configuration mode, where the continuous downlink transmission time includes Continuous downlink subframe and after the continuous downlink subframe DwPTS.
  • the continuous downlink transmission time includes subframe 5 to subframe 9, subframe 0 of the next radio frame, and subsequent DwPTS.
  • the start time of the downlink channel occupation time can be determined.
  • the end time of each downlink CCA time is set as the start time of the downlink channel occupation time.
  • the CCA time is configured in the subframe 4 of each radio frame, and the CCA time length is 20 us, and the idle channel detection is performed.
  • the end time, that is, the start time of the subframe 5 is set as the start time of the downlink channel occupation time.
  • the continuous downlink transmission time after the start time of the downlink occupation time is set as the uplink channel occupation time.
  • the start time of the downlink occupation time is the start time of the subframe 5, and the subframe 5 to the subframe 9, the subframe 0 of the next radio frame, and the subsequent DwPTS are set as the downlink channel occupation. time.
  • the UE can determine the downlink channel occupation time according to the configuration information of the downlink CCA time and the uplink and downlink subframe configuration of the TDD system.
  • the UE is enabled to turn off the receiver during the non-downstream channel occupation time to achieve power saving.
  • a further embodiment of the present invention provides a method for configuring an unlicensed band channel occupation time for determining a downlink channel occupation time by a UE under a load-based LBT mechanism.
  • FIG. 12 is a flowchart of the present invention.
  • the flowchart of the sixth embodiment of the present invention includes the following steps:
  • the base station notifies the UE in the cell by the transmission system broadcast, and the UE obtains the subframe configuration mode used by the base station after receiving the system broadcast, thereby obtaining the position of the uplink and downlink subframe in each radio frame.
  • the UE can know that the uplink and downlink attributes from subframe 0 to subframe 9 are DSUUUDDDDD, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.
  • the base station can also perform flexible TDD configuration according to the state of arrival of the service, according to the industry.
  • Each of the one or more radio frames is an uplink subframe or a downlink subframe, so that the uplink and downlink subframes in the radio frame do not necessarily appear in the subframe configuration 3.
  • the base station may send a Reservation Signal to indicate that the UE base station will use the subsequent downlink subframe to send downlink data to the UE, and the Reservation Signal occupies one or several symbols of one downlink subframe, and after receiving the Reservation Signal, the UE receives the Reservation Signal. It can be known that a certain symbol of the current downlink subframe of the Reservation Signal or the next most recent downlink subframe base station starts to occupy the channel to transmit downlink data.
  • the UE determines a location in which downlink transmission is possible in each radio frame, thereby obtaining a continuous downlink transmission time in the radio frame in the subframe configuration mode, where the continuous downlink transmission time includes Continuous downlink subframe and DwPTS after the consecutive downlink subframe.
  • the continuous downlink transmission time includes subframe 5 to subframe 9, subframe 0 of the next radio frame, and subsequent DwPTS.
  • the base station Under the load-based LBT mechanism, when the UE receives the Reservation Signal, it is known that the base station will use the subsequent downlink subframe to send downlink data to the UE, and the moment when the Reservation Signal is received is the start time of the downlink channel occupation time. For example, if the UE receives the Reservation Signal in the subframe 6, the time at which the Reservation Signal is received is the start time of the downlink channel occupation time.
  • Reservation Signal does not indicate the maximum downlink channel occupation time, set the continuous downlink transmission time after the start time of the downlink channel occupation time as the downlink channel occupation time.
  • the continuous downlink transmission time after receiving the above Reservation Signal is set as the downlink channel occupation time.
  • the UE receives the Reservation Signal in subframe 6, and receives subframe 6 to subframe 9, after the Reservation Signal, subframe 0 of the next radio frame, and subsequent DwPTS settings. It takes time for the downlink channel.
  • Reservation Signal indicates the maximum downlink channel occupation time
  • determine the maximum downlink channel occupation time termination time and set the continuous uplink transmission time between the start time of the downlink channel occupation time and the maximum downlink channel occupation time termination time as the uplink channel. Take up time.
  • the Reservation Signal indicates that the maximum downlink channel occupation time is subframe 6 and the following two subframes by occupying 2 symbols, as shown in FIG. 13-c, then 2 subframes after subframe 6 are subframe 8
  • the end time is set to the maximum downlink channel occupation time termination time, and the continuous downlink transmission time between the time when the Reservation Signal is received and the termination time of the subframe 8 is set as the downlink channel occupation time.
  • the UE can determine the downlink channel occupation time according to the Reservation Signal sent by the base station and the uplink and downlink subframe configuration of the TDD system, thereby enabling the UE to The receiver is turned off at a non-downstream channel occupation time to achieve power saving.
  • the seventh embodiment provides a method for configuring an unlicensed band channel occupation time, which is used by the UE to determine an uplink channel occupation time.
  • FIG. 14 is a schematic flowchart of Embodiment 7 of the present invention. The method provided in Embodiment 7 of the present invention includes the steps of:
  • the subframe used by the setting system is configured as the subframe configuration 0.
  • the uplink and downlink attributes from the subframe 0 to the subframe 9 are DSUUUDSUUU.
  • S702. Receive configuration information of an uplink CCA time of an unlicensed band and an uplink grant signaling.
  • the CCA time is configured in the GP of the special subframe, the CCA time length is 20 us, and the CCA time period is configured to be 5 ms.
  • the UE After receiving the uplink CCA configuration information, the UE knows that each The possible CCA time is 20us in the GP before the start of the UpPTS for each special subframe. The UE may trigger idle channel detection after receiving the Uplink Grant.
  • S703. Determine, according to the configuration information of the CCA time and the uplink grant signaling, a start time of the uplink channel occupation time.
  • the UE receives the Uplink Grant signaling for the subframe 2 and the subframe 3, the Uplink Grant signaling simultaneously schedules the subframe 2 and the subframe 3.
  • the idle channel detection is triggered.
  • the idle channel detection is initiated in the most recent CCA time before the consecutive subframe in which the subframe 2 is located, that is, the idle channel detection is performed in the GP of the subframe 1.
  • the UpPTS start time is set to the start time of the uplink channel occupation time when the GP of the subframe 1 ends.
  • the Uplink Grant after the start time of the uplink channel occupation time allows the continuously transmitted uplink transmission subframe to be set as the uplink channel occupation time.
  • the Uplink Grant signaling received this time allows the continuously transmitted uplink transmission subframes to be subframe 2 and subframe 3, so subframe 2 and subframe 3 are set as the uplink channel occupation time.
  • the UE can determine the uplink channel occupation time according to the uplink CCA time indication message and the Uplink Grant signaling, and determine the uplink channel occupation time, thereby performing data transmission.
  • the eighth embodiment of the present invention provides a terminal device, which can adopt the method for configuring the unoccupied frequency band channel occupation time proposed by the present invention, that is, the unlicensed frequency band provided by the foregoing Embodiment 1 to Embodiment 7 can be executed.
  • Each step in the method of configuring the channel occupancy time. Referring to FIG. 15, the terminal device a00 may include:
  • the receiving unit a10 is configured to acquire a subframe configuration in the TDD LTE system, and is further configured to receive an indication message of a CCA time of the unlicensed frequency band, where the indication message of the CCA time includes an indication message of an uplink CCA time and an indication of a downlink CCA time. Message.
  • the processing unit a20 is configured to determine, according to the subframe configuration and the CCA time indication message acquired by the receiving unit, a channel occupation time on an unlicensed frequency band, and perform data transmission and data according to the channel occupation time. receive.
  • the receiving unit a10 is further configured to: receive a signaling message indicating a maximum channel occupation time to obtain a maximum channel occupation time; the signaling message includes an RRC message, a PDCCH signaling, or a channel pre- A signal is reserved, and the maximum channel occupation time includes a maximum uplink channel occupation time and a maximum downlink channel occupation time.
  • the processing unit a20 is further configured to: according to the subframe configuration acquired by the receiving unit, the maximum channel occupation time, and the indication message of the CCA time received by the receiving unit. Determining the channel occupancy time on the unlicensed band and according to the letter The channel takes up time for data transmission and data reception.
  • the subframe configuration received by the receiving unit a10 includes a subframe configuration preset by the TDD system, or a subframe configuration temporarily set by the base station according to service characteristics or channel conditions.
  • the processing unit a20 determines an uplink channel occupation time according to the subframe configuration and the CCA time indication message acquired by the receiving unit: the subframe configuration obtained according to the receiving unit a10. And obtaining a continuous uplink transmission time in the radio frame in the subframe configuration, where the continuous uplink transmission time includes an uplink pilot time slot UpPTS and a continuous uplink subframe after the UpPTS, and then received according to the receiving unit a10.
  • the indication message of the uplink CCA time determines a start time of an uplink channel occupation time; and sets the continuous uplink transmission time after the start time of the uplink channel occupation time as an uplink channel occupation time.
  • the processing unit a20 determines the maximum uplink according to the start time of the uplink channel occupation time and the maximum uplink channel occupation time acquired by the receiving unit a10. At the end of the channel occupation time, the continuous uplink transmission time between the start time of the uplink channel occupation time and the maximum uplink channel occupation time termination time is set as the uplink channel occupation time.
  • the indication message of the uplink CCA time received by the receiving unit a10 includes configuration information of the uplink CCA time and an uplink authorization permission.
  • the processing unit a20 starts the uplink CCA, and sets the end time of the CCA time as the starting time of the next uplink channel occupation time.
  • the processing unit a20 obtains, by using the received uplink authorization, an uplink transmission subframe that is allowed to be continuously sent by the uplink authorization, and the uplink authorization after the start time of the uplink channel occupation time.
  • the permission allows the continuously transmitted uplink transmission subframe to be set to the uplink channel occupation time.
  • the processing unit a20 determines a downlink channel occupation time according to the subframe configuration and the CCA time indication message acquired by the receiving unit: according to the subframe configuration acquired by the receiving unit, Obtaining a continuous downlink transmission time in the radio frame in the subframe configuration, where the continuous downlink transmission time includes a downlink after the continuous downlink subframe and the continuous downlink subframe a pilot time slot DwPTS; determining, according to the indication message of the downlink CCA time received by the receiving unit, a start time of the downlink channel occupation time; and the continuous downlink transmission after the start time of the downlink channel occupation time The time is set to the downlink channel occupation time.
  • the processing unit a20 determines the maximum downlink channel occupation time according to the start time of the downlink channel occupation time and the maximum channel occupation time obtained by the receiving unit a10. At the termination time, the continuous downlink transmission time between the start time of the downlink channel occupation time and the maximum downlink channel occupation time termination time is set as the downlink channel occupation time.
  • the indication message of the downlink CCA time received by the receiving unit a10 is a Reservation Signal signal.
  • the processing unit a20 sets the time at which the Reservation Signal signal is received as the starting time of the downlink channel occupation time.
  • the ninth embodiment of the present invention further provides a terminal device.
  • the base station device b00 may include: at least one processor b10, a bus b20, and at least one connected to the bus and the memory b30. Interface b40.
  • the memory b30 is used to store a computer execution instruction, and the processor b10 calls a computer execution instruction stored in the memory b30 via the bus b20 and executes the instruction.
  • the communication interface b40 is used to receive data from the external device, write to the memory b30 via the bus b20, and then process the data written to the memory b30 by the processor b10; send data to the external device
  • the processor b10 writes the processed data to the memory b30 via the bus, and then transmits the processed data to the communication interface b40 via the bus b20, and finally the communication interface b40 transmits the data to the external device.
  • the terminal device is caused to perform the methods as in the first to sixth embodiments.
  • the communication interface b40 receives the subframe configuration in the TDD LTE system, and receives the indication message of the CCA time of the unlicensed band, and saves the received subframe configuration and the CCA time indication message in the memory b30 for processing by the processor b10.
  • the indication message of the CCA time includes an indication message of an uplink CCA time and an indication message of a downlink CCA time.
  • the processor b10 determines the channel occupation time on the unlicensed frequency band according to the subframe configuration and the indication message of the CCA time, and performs data transmission and data reception according to the channel occupation time.
  • the communication interface b40 may further receive a signaling message indicating a maximum channel occupation time to store a maximum channel occupation time in the memory b30; the signaling message includes an RRC message, PDCCH signaling, or Channel reservation signal, the maximum channel occupation time includes a maximum uplink channel occupation time and a maximum downlink channel occupation time.
  • the processor b10 may further determine, according to the obtained subframe configuration, the maximum channel occupation time, and the received indication message of the CCA time, the channel occupation time on the unlicensed frequency band, and according to The channel takes up time for data transmission and data reception.
  • the subframe configuration received through the communication interface b40 includes a subframe configuration preset by the TDD system, or a subframe configuration temporarily set by the base station according to service characteristics or channel conditions.
  • the processor b10 determines an uplink channel occupation time according to the obtained subframe configuration and the CCA time indication message: according to the subframe configuration, obtaining a continuous uplink in the radio frame in the subframe configuration.
  • the transmission time, the continuous uplink transmission time includes an uplink pilot time slot UpPTS and a continuous uplink subframe after the UpPTS, and then determines an initial time of the uplink channel occupation time according to the indication message of the uplink CCA time;
  • the continuous uplink transmission time after the start time of the channel occupation time is set as the uplink channel occupation time.
  • the processor b10 determines the maximum uplink channel occupation time termination time according to the start time of the uplink channel occupation time and the maximum uplink channel occupation time, and The continuous uplink transmission time between the start time of the uplink channel occupation time and the maximum uplink channel occupation time termination time is set as the uplink channel occupation time.
  • the indication message of the uplink CCA time received through the communication interface b40 includes configuration information of the uplink CCA time and an uplink authorization permission.
  • the communication interface b40 when the communication interface b40 receives the uplink grant, if the uplink subframe indicated by the uplink grant permission and the uplink subframe indicated by the last uplink grant permission do not belong to the continuous uplink in the subframe configuration.
  • the processor b10 starts the uplink CCA, and sets the end time of the CCA time as the starting time of the next uplink channel occupation time.
  • the processor b10 obtains, by using the received uplink authorization, an uplink transmission subframe that the uplink authorization permission allows to continuously send, and the uplink authorization after the start time of the uplink channel occupation time The permission allows the continuously transmitted uplink transmission subframe to be set to the uplink channel occupation time.
  • the processor b10 determines a downlink channel occupation time according to the subframe configuration acquired by the receiving unit and the indication message of the CCA time: according to the subframe configuration received through the communication interface b40, Obtaining a continuous downlink transmission time in the radio frame in the subframe configuration, where the continuous downlink transmission time includes a continuous downlink subframe and a downlink pilot time slot DwPTS after the continuous downlink subframe; according to the downlink CCA time
  • the indication message determines a start time of the downlink channel occupation time; and sets the continuous downlink transmission time after the start time of the downlink channel occupation time as the downlink channel occupation time.
  • the processor b10 obtains according to the start time of the downlink channel occupation time and the signaling message for indicating the maximum channel occupation time.
  • the maximum channel occupation time determines the maximum downlink channel occupation time termination time, and the continuous downlink transmission time between the start time of the downlink channel occupation time and the maximum downlink channel occupation time termination time is set as the downlink channel occupation time. .
  • the indication message of the downlink CCA time received through the communication interface b40 is a Reservation Signal signal.
  • the processor b10 sets the time at which the Reservation Signal is received to the start time of the downlink channel occupation time.
  • the terminal device provided in the ninth embodiment of the present invention can be used to implement the steps in the method for configuring the channel occupation time of the unlicensed frequency band provided in the first to seventh embodiments of the present invention, and details are not described herein.
  • aspects of the present invention, or possible implementations of various aspects may be embodied as a system, method, or computer program product.
  • aspects of the invention, or possible implementations of various aspects may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.
  • the computer readable medium can be a computer readable data medium or a computer readable storage medium.
  • the computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), Erase programmable read-only memory (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).
  • a processor in the computer reads computer readable program code stored on a computer readable medium, The processor is enabled to perform the functional actions specified in each step or combination of steps in the flowchart; the means for implementing the functional actions specified in each block of the block diagram or in the combination of the blocks.
  • the computer readable program code can execute entirely on the user's computer, partly on the user's computer, as a separate software package, partly on the user's own computer and partly on the remote computer, or entirely on the remote computer or server Execute on. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

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

Abstract

Un mode de réalisation de la présente invention concerne un procédé d'attribution d'un temps d'occupation de canal dans une bande de fréquences non autorisées. Le procédé comprend les étapes consistant à : acquérir une configuration de sous-trame dans un système TDD LTE ; recevoir un message d'indication de temps d'évaluation de canal dégagé (CAA) dans une bande de fréquences non autorisées, le message d'indication de temps CCA contenant un message d'indication de temps CCA de liaison montante et un message d'indication de temps CCA de liaison descendante ; et déterminer, selon la configuration de sous-trame et le message d'indication de temps CCA, un temps d'occupation du canal dans la bande de fréquences non autorisées, et transmettre et recevoir des données selon le temps d'occupation du canal. La solution technique du mode de réalisation de la présente invention permet à un UE de déterminer un temps d'occupation de canal de liaison montante et un temps d'occupation de canal de liaison descendante selon le message d'indication de temps CCA et les configurations de sous-trames de liaison montante et de liaison descendante. Cela permet de transmettre des données dans le temps d'occupation de canal liaison montante ou de désactiver un récepteur durant un temps d'occupation de canal non de liaison descendante afin de réduire la consommation d'énergie d'un terminal.
PCT/CN2015/085865 2015-05-28 2015-07-31 Procédé et dispositif d'attribution de temps d'occupation de canal dans une bande de fréquences non autorisées WO2016187954A1 (fr)

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