WO2016187954A1 - 一种非授权频段信道占用时间的配置方法及装置 - Google Patents
一种非授权频段信道占用时间的配置方法及装置 Download PDFInfo
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- 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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- uplink
- channel occupation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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
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- 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
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- 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
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- 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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Abstract
本发明实施例公开了一种非授权频段信道占用时间的配置方法,包括:获取TDDLTE系统中的子帧配置;接收非授权频段的空闲信道检测CCA时间的指示消息,CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息;根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。本发明实施例的技术方案使UE根据CCA时间的指示消息和上下行子帧配置,确定上行信道占用时间和下行信道占用时间,从而在上行信道占用时间内进行数据发送,或在非下行信道占用时间内关闭接收机达到终端节省电能消耗的目的。
Description
本申请要求于2015年05月28日提交中国专利局,申请号为201510282606.3、发明名称为“一种非授权频段信道占用时间的配置方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本发明涉及通信技术领域,尤其涉及一种非授权频段信道占用时间的配置方法及装置。
随着移动通信业务量的急剧增加,3GPP网络中的授权频段越来越不满足日益增加的业务量,为了在有限的频率资源上进一步提高频率资源利于效率,3GPP组织转向非授权频段的接入技术研究,引入了LTE辅助接入(LTE Assisted Access,LAA)技术,以期借助授权频段上的长期演进(Long Term Evolution,LTE)接入技术辅助使用非授权频段。相比工作在非授权频段的WiFi,LTE接入技术能够提供更高的频率效率和更全面的位置覆盖,更好的服务质量和移动性支持。
在非授权频段上的WiFi技术是通过载波监听多址接入/冲突检测(Carrier Sense Multiple Access/Collision Detection,CSMA/CA)消除不同WiFi设备之间的干扰,在发送数据之前,WiFi设备先监听信道是否空闲,如果信道空闲则进行退避,当退避时间结束时用户开始发送信令或数据。为了在非授权频段上让LTE设备和WiFi设备更公平的享有资源,3GPP在LAA中引入了先听后说(Listen Before Talk,LBT)机制,用于LTE设备在非授权频段上的监听和检测空闲信道。LBT机制在空闲信道检测(Clear Channel Assessment,CAA)时间监听和检测非授权频段的信道,当检测到非授权频段空闲时,开始占用非授权频段进行数据发送。TDD系统中,终端获知上行、下行信道占用时间以便于终端发送数据或者节省电能消耗。但是,TDD制式LTE系统中的上行、下行子帧配置情况复杂,上行和下行无法使用固定的信道占用时间,目前还没
有针对TDD系统的非授权频段信道占用时间的配置方法。
发明内容
本发明实施例公开了一种非授权频段信道占用时间的配置方法,使用本发明实施例提供的技术方案,可以使终端设备(User Equipment,UE)根据CCA时间的指示消息和上下行子帧配置,确定上行信道占用时间和下行信道占用时间,从而在上行信道占用时间内进行数据发送,在在下行信道占用时间内接收数据,在非下行信道占用时间内关闭接收机达到终端节省电能消耗的目的。
本发明实施例第一方面提供了一种非授权频段信道占用时间的配置方法,包括:
获取时分双工TDD长期演进LTE系统中的子帧配置;
接收非授权频段的空闲信道检测CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息;
根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
结合第一方面,在第一种可能的实施方式中,所述接收非授权频段上的CCA时间的指示消息之后,所述方法还包括:
接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间;所述信令消息包括无线资源控制RRC消息、物理层下行控制信道PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间;
根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
结合第一方面,在第二种可能的实施方式中,所述根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:
根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧;
根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;
将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。
结合第一方面的第一种可能的实现方式,在第三种可能的实施方式中,所述根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:
根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括UpPTS和所述UpPTS之后的连续上行子帧;
根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;
根据所述上行信道占用时间的起始时刻和所述最大上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
结合第一方面的第二种或第三种可能的实现方式,在第四种可能的实施方式中,所述上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可;
所述根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻,包括:
当接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则启动上行CCA,并将所述CCA时间的结束时刻设定为上行信道占用时间的起始时刻。
结合第一方面的第四种可能的实现方式,在第五种可能的实施方式中,所述将所述CCA时间的结束时刻设定为上行信道占用时间的起始时刻之后,所述方法还包括:
通过接收的上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧;
将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
结合第一方面,在第六种可能的实施方式中,所述根据所述子帧配置和所
述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:
根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行导频时隙DwPTS;
根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;
将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。
结合第一方面的第一种可能的实现方式,在第七种可能的实施方式中,所述根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:
根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS;
根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;
根据所述下行信道占用时间的起始时刻和所述最大下行信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
结合第一方面的第六种或第七种可能的实现方式,在第八种可能的实施方式中,若在非授权频段上的LBT机制为基于负载的LBT机制,所述下行CCA时间的指示消息为所述信道预留信号;
所述根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻,包括:
当接收到所述信道预留信号时,将接收到所述信道预留信号的时刻设定为所述下行信道占用时间的起始时刻。
结合第一方面,在第九种可能的实施方式中,所述子帧配置包括:
预设子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
本发明实施例第二方面提供了一种终端设备,包括:
接收单元,用于获取TDD LTE系统中的子帧配置;
所述接收单元,还用于接收非授权频段的CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息;
处理单元,用于根据所述接收单元获取的所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
结合第二方面,在第一种可能的实现方式中,所述接收单元还用于:
接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间;所述信令消息包括RRC消息、PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间;
所述处理单元还用于,根据所述接收单元获取的所述子帧配置、所述最大信道占用时间和所述接收单元接收的所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
结合第二方面,在第二种可能的实现方式中,所述处理单元具体用于:
根据所述接收单元获得的所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧;
根据所述接收单元接收的所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;
将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。
结合第二方面的第一种可能的实现方式,在第三种可能的实现方式中,所述处理单元具体用于:
根据所述接收单元获取的所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括UpPTS和所述UpPTS之后的连续上行子帧;
根据所述接收单元接收的所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;
根据所述上行信道占用时间的起始时刻和所述接收单元获得的所述最大
上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
结合第二方面的第二种或第三种可能的实现方式,在第四种可能的实现方式中,所述接收单元接收的所述上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可;所述处理单元具体用于:
当接收单元接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则启动上行CCA,并将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻。
结合第二方面的第四种可能的实现方式,在第五种可能的实现方式中,所述处理单元还用于:
通过接收单元接收的所述上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧;
将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
结合第二方面,在第六种可能的实现方式中,所述处理单元具体用于:
根据所述接收单元获取的所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行导频时隙DwPTS;
根据所述接收单元接收的下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;
将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。
结合第二方面的第一种可能的实现方式,在第七种可能的实现方式中,所述处理单元具体用于:
根据所述所述接收单元获取的子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS;
根据所述接收单元接收的所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;
根据所述下行信道占用时间的起始时刻和所述接收单元获得的所述最大下行信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
结合第二方面的第六种或第七种可能的实现方式,在第八种可能的实现方式中,其特征在于,若在非授权频段上的LBT机制为基于负载的LBT机制,所述接收单元接收的下行CCA时间的指示消息为所述信道预留信号;所述处理单元用于:
当所述接收单元接收到所述信道预留信号时,将接收到所述信道预留信号的时刻设定为所述下行信道占用时间的起始时刻。
结合第二方面,在第九种可能的实现方式中,所述接收单元获取的所述子帧配置包括:
预设子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
可以看出,使用本发明实施例的技术方案,可以使UE通过获取TDD LTE系统中的子帧配置方式和接收非授权频段的CCA时间的指示消息,确定在非授权频段上的信道占用时间。即通过上行CCA时间的指示消息和子帧配置方式确定在上行信道占用时间起始时刻后的最大连续上行子帧,将其设定为上行信道占用时间;通过下行CCA时间的指示消息和子帧配置方式确定在下行信道占用时间的起始时刻之后的最大连续上行子帧,将其设定为下行信道占用时间,从而根据所述上行、下行信道占用时间进行数据发送和数据接收。优选地,还可以通过接收最大信道占用时间的信令消息,获得基站设定的最大信道占用时间,结合该最大信道占用时间、子帧配置方式以及上述CCA时间的指示消息,确定在非授权频段上的信道占用时间。通过上述方法,UE可以确定上行信道占用时间,从而顺利进行上行数据发送,以及可以确定下行信道占用时间,从而在非下行信道占用时间内关闭接收机,实现节省电量消耗。
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的基于帧结构的LBT机制的示意图;
图2是本发明实施例提供的基于负载的LBT机制的示意图;
图3是本发明实施例一提供的一种非授权频段信道占用时间的配置方法的流程示意图;
图4是TDD LTE系统的帧结构示意图;
图5是TDD LTE系统子帧配置示意图;
图6是本发明实施例二提供的又一种非授权频段信道占用时间的配置方法的流程示意图;
图7是本发明实施例三提供的又一种非授权频段信道占用时间的配置方法的流程示意图;
图8-a是子帧配置0下的连续上行传输时间示意图;
图8-b是在基于帧结构的LBT机制下确定的上行信道占用时间示意图;
图8-c是在基于负载的LBT机制下确定的上行信道占用时间示意图;
图9是实施例四提供的又一种非授权频段信道占用时间的配置方法示意图;
图10是实施例五提供的又一种非授权频段信道占用时间的配置方法示意图;
图11是在基于帧结构的LBT机制下确定的下行信道占用时间的示意图;
图12是实施例六提供的又一种非授权频段信道占用时间的配置方法的示意图;
图13-a是子帧配置3下的连续下行传输时间的示意图;
图13-b是在基于负载的LBT机制下确定的下行信道占用时间的示意图;
图13-c是另一种在基于负载的LBT机制下确定的下行信道占用时间的示意图;
图14是实施例七提供的又一种非授权频段信道占用时间的配置方法的示意图;
图15是实施例八提供的一种终端设备的示意图;
图16是实施例九提供的另一种终端设备的示意图。
3GPP在LAA中引入了先听后说(Listen Before Talk,LBT)机制,用于LTE设备在非授权频段上的监听和检测空闲信道。LBT机制主要分为基于帧结构的LBT机制和基于负载的LBT机制。
基于帧结构的LBT机制的原理参见图1,如图1所示,一个空闲信道检测周期包含CCA时间、信道占用时间和空闲时间,CCA时间位于每个空闲信道检测周期的最开始。LTE设备在发送数据之前,在CCA时间内监听信道是否空闲,如果信道空闲在随后的信道占用时间内发送数据,在该检测周期的空闲时间内释放信道;如果在CCA时间内检测到信道繁忙则不能在随后的信道占用时间内发送数据。CCA时间占用子帧的一个或多个符号,如图1所示,CCA开始于子帧0的第一个符号。基于帧结构的LBT机制的优点是实现方式简单,缺点是数据传输时延较大。
基于负载的LBT机制的原理参见图2,在基于负载的LBT机制中,LTE设备的空闲信道检测无固定周期,只有在有数据发送的情况下才进行空闲信道检测。在发送数据之前,LTE设备立即在下一个可用的初始CCA时间上监听信道是否空闲,如果信道空闲,则在随后的信道占用时间内发送数据,否则不发送数据;如果在初始CCA时间上监听信道为繁忙或者在信道占用时间内数据未发送完,则开始扩展CCA时间,在每个扩展CCA时间间隔内检测信道是否空闲,扩展CCA时间间隔与初始CCA时间长度相同,若检测到信道空闲,记一次信道空闲,当记到N次信道空闲时在随后的信道占用时间内发送数据,
否则不发送数据。其中N取值为1至q的整数,其中q为扩展CCA时间的竞争窗口长度,大于等于4并且小于等于32。基于负载的LBT基站的优点是在负载较重时性能较好,数据传输时延较小。
本发明实施例公开了一种非授权频段信道占用时间的配置方法,使用本发明实施例提供的技术方案可以使UE根据上行信道占用时间的起始时刻和TDD系统的上下行子帧配置,确定上行信道占用时间,从而进行数据发送;或者UE可以根据基站将要向该UE发送数据的下行信道占用时间的起始时刻和TDD系统的上下行子帧配置,确定基站将要向该UE发送数据的下行信道占用时间,在非下行信道占用时间内关闭接收机,从而实现终端节省电能消耗。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
为了更好的理解本发明实施例,以下分别对每个实施例进行说明。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元,而是可选地还包括没有列出的步骤或单元,或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
参见图3,图3为本发明实施例一提供一种非授权频段信道占用时间的配置方法的流程示意图,其中,如图3所示,本发明实施例一提供的方法可以包括步骤:
S101、获取TDD LTE系统中的子帧配置。
在TDD LTE系统中基站和终端根据子帧配置方式确定上下行子帧的位置。TDD LTE系统的帧结构如图4所示,10ms的无线帧包含两个半帧,半帧长度为5ms,每个半帧包含5个子帧,子帧长度为1ms,每个子帧可用于上行或下行传输。TDD LTE系统存在多种上下行子帧配置比例,即多种子帧配置方式,可分为5ms为周期的子帧配置方式和10ms的子帧配置方式。在5ms
周期的子帧配置中,子帧1和子帧6为特殊子帧,在10ms周期的子帧配置中,子帧1为特殊子帧。每个特殊子帧由DwPTS、UpPTS和上下行传输的保护间隔(Guard Period,GP)组成,DwPTS用于下行传输,UpPTS用于上行传输。4种以5ms为周期的子帧配置和3种以10ms为周期的子帧配置,一共6种子帧配置方式如图5所示,其中“D”表示下行子帧,“U”表示上行子帧,“S”表示特殊子帧。
基站通过发送系统广播将TDD系统子帧配置方式通知给小区中的UE,UE接收系统广播后获知基站所使用的子帧配置方式,从而获得每个无线帧中上下行子帧的位置。
在TDD制式的LTE系统中,还可根据业务到达的状态进行灵活的TDD配置,根据业务到达状态设定后续一个或多个无线帧中每个子帧是上行子帧或下行子帧,这样无线帧中的上行、下行子帧不一定按照上述6种LTE系统预设的子帧配置方式出现。例如,当下行业务较多时,基站可以将下一个无线帧中的子帧全部配置成下行子帧,基站可将该配置通过系统广播发送给小区中的UE。UE接收系统广播后即可获得基站所设定的上行、下行子帧位置。
S102、接收非授权频段的CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。
UE通过接收基站发送的非授权频段CCA时间的指示消息,可以得到检测非授权信道的CCA时间。所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。UE通过上行CCA时间的指示消息获得UE检测非授权频段的CCA时间,通过下行CCA时间的指示消息可获得基站检测非授权频段的CCA时间。
TDD LTE系统在非授权频段上可采用基于帧结构的LBT机制和基于负载的LBT机制。
在基于帧结构的LBT机制下,CCA时间有固定的周期,可以通过CCA时间长度、CCA时间偏移、CCA时间周期来确定CCA时间。CCA时间所在的子帧可通过以下公式确定,当帧号和子帧号满足该公式时出现CCA时间:
[(FrameNum×10)+SFN]%NCCA_Cycle=NCCA_Offset
其中,NCCA_Cycle为CCA时间周期,NCCA_Offset为CCA时间的子帧偏移。
基于帧结构的LBT机制下,CCA时间的配置信息由基站确定,包括:CCA时间长度、CCA时间子帧偏移、CCA时间周期。可将UE的CCA时间配置在特殊子帧的GP上、特殊子帧的UpPTS或上行子帧上,可将基站的CCA时间配置在特殊子帧的DwPTS、下行子帧或紧挨下行子帧的上行子帧上。基站将上述CCA时间的配置信息通过CCA时间的指示消息发送给UE。UE从该CCA时间的指示消息中获得CCA时间的配置信息,通过以上公式可确定每个周期CCA时间的起始时刻。基站可以将上行CCA时间的指示消息和下行CCA时间的指示消息放在同一条无线资源控制(Radio Resource Control,RRC)重配置消息中发送给UE;基站也可以将上行CCA时间的指示消息放在RRC重配置消息中发送给UE,将下行CCA时间的指示消息放在系统广播中发送给UE。由此,UE可以获得UE检测非授权频段的CCA时间,以及基站检测非授权频段的CCA时间。在上行方向,基站通过发送上行授权许可(Uplink Grant)信令告知UE发送上行数据的资源位置以及触发UE启动空闲信道检测。
在基于负载的LBT机制下,可通过初始CCA时间长度、初始CCA时间起始时刻、信道占用时间长度和扩展CCA时间竞争窗口长度q,其中q为大于等于4小于等于32的整数,来确定非授权频段的CCA时间,CCA时间包括初始CCA时间和扩展CCA时间。UE在1至q之间随机选取一个整数N,在扩展CCA时间内,若检测到信道空闲,使N减去1,否则N不变,当N减为0时,扩展CCA时间结束,进入信道占用时间,开始发送数据。基于负载的LBT机制下,UE的CCA时间的配置信息由基站确定,包括:初始CCA时间长度、扩展CCA时间的竞争窗口长度q。基站通过RRC重配置消息将上述CCA时间的配置信息发送给UE,让UE获得上述CCA时间的配置信息。在上行方向,基站通过发送Uplink Grant信令告知UE发送上行数据的资源位置以及触发UE开始检测空闲信道,即启动初始CCA时间,初始CCA时间和扩展CCA时间可以位于特殊子帧的GP、特殊子帧的UpPTS或上行子帧。上行CCA时间的指示消息包括携带CCA时间配置信息的RRC重配置消息和该Uplink Grant信令。在下行方向,基站的CCA时间可以位于特殊子帧的DwPTS、下行子帧或紧挨下行子帧的上行子帧上,当检测到信道空闲后,可以通过发送信道预留信令(Reservation Signal)指示UE基站将使用后续的下行子帧向UE发
送下行数据,Reservation Signal占用一个下行子帧的一个或几个符号,UE接收到该Reservation Signal后即可知道在接收到该Reservation Signal的当前下行子帧的某个符号或下一个最近的下行子帧基站开始占用信道发送下行数据,因此在基于负载的LBT机制下,下行CCA时间的指示信息指该Reservation Signal。
S103、根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,从而根据所述信道占用时间进行数据发送和数据接收。
上行信道占用时间的确定方法具体包括:
根据步骤S101获取的子帧配置方式,UE可以确定在每个无线帧中可进行上行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续上行传输时间,连续上行传输时间包括特殊子帧中的UpPTS和该UpPTS之后的连续上行子帧。
根据步骤S102中接收的上行CCA时间的指示消息,可确定上行信道占用时间的起始时刻。在基于帧结构的LBT机制下,UE通过上行CCA时间的配置信息可知每个周期出现的CCA时间的具体位置。当UE接收到Uplink Grant时,若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧,则在Uplink Grant指示的上行子帧所在的连续上行子帧之前的最近CCA时间启动空闲信道检测,将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻;若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧属于子帧配置中的连续上行子帧,说明接收上一次Uplink Grant指示时已触发空闲信道检测,并且本次Uplink Grant指示的上行子帧属于该空闲信道检测之后的信道占用时间,因此本次Uplink Grant不用再触发空闲信道检测。在基于负载的LBT机制下,当UE接收到UpLink Grant信令时,若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧,则在Uplink Grant指示的上行子帧所在的连续上行子帧之前的最近保护间隔GP、UpPTS或上行子帧启动空闲信道检测,开始初始CCA,则将该CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻;若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧属于子帧配置中的连续上行
子帧,说明接收上一次Uplink Grant指示时已触发空闲信道检测,并且本次Uplink Grant指示的上行子帧属于该空闲信道检测之后的信道占用时间,因此本次Uplink Grant不再触发空闲信道检测。当初始CCA时间内检测到信道不空闲或者当初始CCA时间之后的信道占用时间内UE未完成数据发送,则启动扩展CCA,当扩展CCA时间结束时为下一次上行信道占用时间的起始时刻。
将上述上行信道占用时间的起始时刻之后的连续上行传输时间设定为上行信道占用时间。例如,当CCA时间位于特殊时隙的GP中时,将该GP之后的UpPTS及其之后的若干上行子帧设定为上行信道占用时间;当CCA时间位于UpPTS时隙中,将CCA时间之后剩余的UpPTS和该UpPTS之后的上行子帧设定为上行信道占用时间。
下行信道占用时间的确定方法具体包括:
根据步骤S101获取的子帧配置方式,UE确定在每个无线帧中可以进行下行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS。
根据步骤S102中接收的下行CCA时间的指示消息,可确定下行信道占用时间的起始时刻。在基于帧结构的LBT机制下,UE通过下行CCA时间的配置信息可知基站的CCA时间的具体位置,每个CCA时间结束时为基站的下行信道占用时间的起始时刻。在基于负载的LBT机制下,当UE接收到Reservation Signal时,可知基站将使用后续的下行子帧向该UE发送下行数据,接收到Reservation Signal的时刻即为下行信道占用时间的起始时刻。
将上述获得的下行信道占用时间的起始时刻之后的连续下行传输时间设定为下行信道占用时间。例如,当UE在DwPTS收到Reservation Signal时,将从接收到Reservation Signal的时刻到其后的DwPTS设定为下行信道占用时间;当UE在一个下行子帧收到Reservation Signal时,将从接收到Reservation Signal时的当前下行子帧到其后的DwPTS设定为下行信道占用时间。
当UE获得上行信道占用时间后,可在所述上行信道占用时间内发送数据,当获得了下行信道占用时间后,可开启接收机准备接收下行数据。
可以看出,使用本发明实施例提供的技术方案可以使UE根据上行信道
占用时间的起始时刻和TDD系统的上下行子帧配置,确定上行信道占用时间,从而进行数据发送;或者UE可以根据基站将要向该UE发送数据的下行信道占用时间的起始时刻和TDD系统的上下行子帧配置,确定基站将要向该UE发送数据的下行信道占用时间,在非下行信道占用时间内关闭接收机,从而实现终端节省电能消耗。
本发明的又一实施例,实施例二提供了一种非授权频段信道占用时间的配置方法,参见图6,图6为本发明实施例二的流程示意图,本发明实施例二提供的方法包括步骤:
S201、获取TDD LTE系统中的子帧配置。
基站通过发送系统广播将TDD系统子帧配置方式通知给小区中的UE,UE接收系统广播后获知基站所使用的子帧配置方式,从而获得每个无线帧中上下行子帧的位置。例如,若系统使用子帧配置0,UE可知从子帧0到子帧9的上下行属性为DSUUUDSUUU,其中D代表下行子帧,U代表上行子帧,S代表特殊子帧。
在TDD制式的LTE系统中,还可根据业务到达的状态进行灵活的TDD配置,根据业务到达状态设定后续一个或多个无线帧中每个子帧是上行子帧或下行子帧,这样无线帧中的上行、下行子帧不一定按照6种LTE系统预设的子帧配置方式出现。例如,当下行业务较多时,基站可以将下一个无线帧中的子帧全部配置成下行子帧,基站可将该配置通过系统广播发送给小区中的UE。UE接收系统广播后即可知基站所设定子帧0到子帧9的上下行属性为DDDDDDDDDD,其中D代表下行子帧。
S202、接收非授权频段的CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。
UE通过接收基站发送的非授权频段CCA时间的指示消息,可以得到检测非授权信道的CCA时间。所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。UE通过上行CCA时间的指示消息获得UE检测非授权频段的CCA时间,通过下行CCA时间的指示消息可获得基站检测非授权频段的CCA时间。
基于帧结构的LBT机制下,CCA时间的配置信息包括:CCA时间长度、
CCA时间子帧偏移、CCA时间周期。可将UE的CCA时间配置在特殊子帧的GP上、特殊子帧的UpPTS或上行子帧上,可将基站的CCA时间配置在特殊子帧的DwPTS、下行子帧或紧挨下行子帧的上行子帧上。基站将上述CCA时间的配置信息通过CCA时间的指示消息发送给UE。UE可确定每个周期CCA时间的位置。基站将上行CCA时间的指示消息和下行CCA时间的指示消息放在同一条RRC重配置消息中发送给UE;基站也可以将上行CCA时间的指示消息放在RRC重配置消息中发送给UE,将下行CCA时间的指示消息放在系统广播中发送给UE。由此,UE可以获得UE检测非授权频段的CCA时间,也可获得基站检测非授权频段的CCA时间。在上行方向,基站通过发送Uplink Grant信令告知UE发送上行数据的资源位置以及触发UE启动空闲信道检测。
基于负载的LBT机制下,UE的CCA时间的配置信息包括:初始CCA时间长度、扩展CCA时间的竞争窗口长度q。基站通过RRC重配置消息将UE的CCA时间的配置信息发送给UE,让UE获得上述CCA时间的配置信息。在上行方向,基站通过发送Uplink Grant信令告知UE发送上行数据的资源位置以及触发UE开始检测空闲信道,即启动初始CCA。初始CCA时间和扩展CCA时间可以位于特殊子帧的GP、特殊子帧的UpPTS或上行子帧。上行CCA时间的指示消息包括携带CCA时间配置信息的RRC重配置消息和该Uplink Grant信令。在下行方向,基站的CCA时间可以位于特殊子帧的DwPTS、下行子帧或紧挨下行子帧的上行子帧上,当检测到信道空闲后,可以通过发送Reservation Signal指示UE基站将使用后续的下行子帧向UE发送下行数据,Reservation Signal占用一个下行子帧的一个或几个符号,UE接收到该Reservation Signal后即可知道在接收到该Reservation Signal的当前下行子帧的某个符号或下一个最近的下行子帧基站开始占用信道发送下行数据,在基于负载的LBT机制下,下行CCA时间的指示信息指该Reservation Signal。
S203、接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间。
基站可以通过系统广播、RRC消息或PDCCH信令向UE发送最大上行信道占用时间和最大下行信道占用时间,还可以通过Reservation Signal向UE指示最大下行信道占用时间,即通过不同的Reservation Signal的扰码和不同的
Reservation Signal占用的符号个数指示不同的最大下行信道占用时间。UE检测到非授权频段为空闲后,占用信道发送上行数据的时间不超过最大上行信道占用时间;同时,UE获知基站占用信道发送下行数据的时间不会超过最大下行信道占用时间。
S204、根据上述子帧配置、最大信道占用时间和CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
上行信道占用时间的确定方法具体包括:
根据步骤S201获取的子帧配置方式,UE可以确定在每个无线帧中可进行上行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续上行传输时间,连续上行传输时间包括特殊子帧中的UpPTS和该UpPTS之后的连续上行子帧。
根据步骤S202中接收的上行CCA时间的指示消息,可确定上行信道占用时间的起始时刻。在基于帧结构的LBT机制下,UE通过上行CCA时间的配置信息可知每个周期出现的CCA时间的具体位置。当UE接收到Uplink Grant时,若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧,则在Uplink Grant指示的上行子帧所在的连续上行子帧之前的最近CCA时间启动空闲信道检测,将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻;若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧属于子帧配置中的连续上行子帧,说明接收上一次Uplink Grant指示时已触发空闲信道检测,并且本次Uplink Grant指示的上行子帧属于该空闲信道检测之后的信道占用时间,因此本次Uplink Grant不用再触发空闲信道检测。在基于负载的LBT机制下,当UE接收到UpLink Grant信令时,若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧,则在Uplink Grant指示的上行子帧所在的连续上行子帧之前的最近保护间隔GP、UpPTS或上行子帧启动空闲信道检测,开始初始CCA,则将该CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻;若由该Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧属于子帧配置中的连续上行
子帧,说明接收上一次Uplink Grant指示时已触发空闲信道检测,并且本次Uplink Grant指示的上行子帧属于该空闲信道检测之后的信道占用时间,因此本次Uplink Grant不再触发空闲信道检测。当初始CCA时间内检测到信道不空闲或者当初始CCA时间之后的信道占用时间内UE未完成数据发送,则开始扩展CCA,当扩展CCA时间结束时为下一次上行信道占用时间的起始时刻。
根据上述确定的上行信道占用时间的起始时刻和步骤203中获取的最大上行信道占用时间确定最大上行信道占用时间终止时刻,将上行信道占用时间的起始时刻和最大上行信道占用时间终止时刻之间的连续上行传输时间设定为上行信道占用时间。例如,如果CCA时间位于特殊时隙的GP中时,最大上行信道占用时间为2ms,将GP之后的2ms时刻设为最大上行信道占用时间终止时刻,将该2ms之内的连续上行传输时间设定为上行信道占用时间。
下行信道占用时间的确定方法具体包括:
根据步骤S201获取的子帧配置方式,UE确定在每个无线帧中可以进行下行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS。
根据步骤S202中接收的下行CCA时间的指示消息,可确定下行信道占用时间的起始时刻。在基于帧结构的LBT机制下,UE通过下行CCA时间的配置信息可知基站的CCA时间的具体位置,每个CCA时间结束时为基站的下行信道占用时间的起始时刻。在基于负载的LBT机制下,当UE接收到Reservation Signal时,可知基站将使用后续的下行子帧向该UE发送下行数据,接收到Reservation Signal的时刻即为下行信道占用时间的起始时刻。
根据上述确定的下行信道占用时间的起始时刻和步骤203中获取的最大下行信道占用时间确定最大下行信道占用时间终止时刻,将下行信道占用时间的起始时刻和最大下行信道占用时间终止时刻之间的连续下行传输时间设定为下行信道占用时间。例如,在基于帧结构的LBT机制下,若UE通过下行CCA时间的配置信息获知下行CCA时间位于下行子帧之前的上行子帧中,该下行子帧开始时刻为下行信道占用时间起始时刻,最大下行信道占用时间如果为2ms,将该下行信道占用时间起始时刻之后2ms时刻设为最大下行信道占用
时间终止时刻,将该2ms之内的连续下行传输时间设为下行信道占用时间;又如,在基于负载的机制下,当UE在一个下行子帧收到Reservation Signal时,接收到Reservation Signal的时刻为下行信道占用时间起始时刻,Reservation Signal指示的最大信道占用时间如果为2ms,将该下行信道占用时间起始时刻之后2ms时刻设为最大下行信道占用时间终止时刻,则将该2ms之内的连续下行传输时间设为下行信道占用时间。
当UE获得上行信道占用时间后,可在所述上行信道占用时间内发送数据,当获得了下行信道占用时间后,可开启接收机准备接收下行数据。
本发明实施例二与实施例一相比,使用最大信道占用时间对信道占用时间进行了限制,使UE根据上行信道占用时间的起始时刻、最大上行信道占用时间和TDD系统的上下行子帧配置,确定上行信道占用时间,从而进行数据发送;或者UE可以根据基站将要向该UE发送数据的下行信道占用时间的起始时刻、最大上行信道占用时间和TDD系统的上下行子帧配置,确定基站将要向该UE发送数据的下行信道占用时间,在非下行信道占用时间内关闭接收机,从而实现终端节省电能消耗。
本发明的又一实施例,实施例三提供了一种非授权频段信道占用时间的配置方法,用于UE确定上行信道占用时间,参考图7,该方法可包括步骤:
S301、获取TDD LTE系统中的子帧配置。
基站通过发送系统广播将TDD系统子帧配置方式通知给小区中的UE,UE接收系统广播后获知基站所使用的子帧配置方式,从而获得每个无线帧中上下行子帧的位置。在实施例三中设定系统使用的子帧配置为子帧配置0,UE读取系统广播后可知从子帧0到子帧9的上下行属性为DSUUUDSUUU。
S302、接收非授权频段的上行CCA时间的配置信息和Uplink Grant信令。
基于帧结构的LBT机制下,上行CCA时间的配置信息包括:CCA时间长度、CCA时间子帧偏移、CCA时间周期。基站可将UE的CCA时间配置在特殊子帧的GP上、特殊子帧的UpPTS或上行子帧上,然后将上述CCA时间的配置信息通过下行信令消息发送给UE。UE可根据该上行CCA时间的配置信息确定每个周期CCA时间的起始时刻。举例来说,将CCA时间配置在特殊子帧中的GP,CCA时间长度为20us,CCA时间周期配置为5ms,收到上行
CCA配置信息后UE可知每个可能的CCA时间位于每个半帧的UpPTS开始之前在GP中的20us。UE接收到Uplink Grant后启动空闲信道检测,假如UE在子帧6收到对子帧2的Uplink Grant信令,应该在子帧2之前的最近CCA时间启动空闲信道检测,即在子帧1的GP中进行空闲信道检测。
基于负载的LBT机制下,上行CCA时间的配置信息包括:初始CCA时间长度、扩展CCA时间的竞争窗口长度q。基站通过RRC重配置消息将上行CCA时间的配置信息发送给UE,让UE获得上述CCA时间的配置信息。基站通过发送Uplink Grant信令告知UE发送上行数据的资源位置以及触发UE开始检测空闲信道,即启动初始CCA。初始CCA时间和扩展CCA时间可以位于特殊子帧的GP、特殊子帧的UpPTS或上行子帧。举例来说,将初始CCA时间配置为20us,扩展CCA时间的竞争窗口长度为4。UE接收到Uplink Grant后启动初始CCA,假如UE在子帧6收到对子帧2的Uplink Grant信令,应该在子帧2之前最近的GP、UpPTS或上行子帧进行空闲信道检测,即在子帧1的GP开始时进行空闲信道检测。
S303、根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间。
根据在步骤S301中获取的子帧配置,UE可确定上行子帧的位置,从而获得在该子帧配置下的连续上行传输时间,连续上行传输时间包括特殊子帧中的UpPTS和该UpPTS之后的连续上行子帧。如图8-a所示,根据子帧配置0,连续上行传输时间包括每个特殊子帧中的UpPTS和之后的连续3个上行子帧。
S304、根据上行CCA时间的配置信息和Uplink Grant信令确定上行信道占用时间的起始时刻。
当UE收到Uplink Grant信令时,在该Uplink Grant信令指示的上行子帧所在的子帧配置中的连续上行子帧之前的最近的CCA时间中启动空闲信道检测,将该CCA时间的结束时刻设定为上行信道占用时间的起始时刻。
如图8-b所示,以上基于帧结构的LBT机制的例子中,CCA时间配置在特殊子帧中的GP,CCA时间长度为20us,CCA时间周期配置为5ms,可知UE每个可能的CCA时间位于每个特殊子帧的UpPTS开始之前在GP中的20us。UE在子帧6收到对子帧2的Uplink Grant信令,因此在子帧1的GP
中进行空闲信道检测,将空闲信道检测结束时刻,即子帧1的UpPTS的起始时刻设定为上行信道占用时间的起始时刻。
如图8-c所示,以上基于负载的LBT机制的例子中,初始CCA时间配置为20us,当UE收到Uplink Grant之后启动初始CCA,假如UE在子帧6收到对子帧2的Uplink Grant信令,应该在下一个可能的CCA时间启动初始CCA,即在子帧1的GP开始时进行初始CCA,将GP开始后20us设定为上行信道占用时间的起始时刻。
S305、将上行信道占用时间的起始时刻之后的连续上行传输时间设定为上行信道占用时间。
如图8-b所示,以上基于帧结构的LBT机制的例子中,上行信道占用时间的起始时刻为子帧1的UpPTS的起始时刻,将从子帧1的UpPTS开始到后续的3个连续上行子帧设定为上行信道占用时间。
如图8-c所示,以上基于负载的LBT机制的例子中,上行信道占用时间的起始时刻为GP开始后的20us时刻,将从该时刻到后续连续的3个连续的上行子帧设定为上行信道占用时间。
可以看出,使用本发明实施例提供的技术方案,在基于帧结构的LBT机制或是在基于负载的LBT机制下,都可以使UE根据上行CCA时间的指示消息和TDD系统的上下行子帧配置,确定上行信道占用时间,从而进行数据发送。
本发明的又一实施例,实施例四提供了一种非授权频段信道占用时间的配置方法,用于UE确定上行信道占用时间,参见图9,图9为本发明实施例四的流程示意图,本发明实施例四提供的方法包括步骤:
S401、获取TDD LTE系统中的子帧配置。
采用实施例三的例子,设定系统使用的子帧配置为子帧配置0,UE读取系统广播后可知从子帧0到子帧9的上下行属性为DSUUUDSUUU。
S402、接收非授权频段的上行CCA时间的配置信息和Uplink Grant信令。
采用实施例三的例子,在基于帧结构的LBT机制下,CCA时间配置在特殊子帧中的GP,CCA时间长度为20us,CCA时间周期配置为5ms,收到上行CCA配置信息后UE可知每个可能的CCA时间位于每个半帧的UpPTS开
始之前在GP中的20us。UE接收到Uplink Grant后可触发空闲信道检测。
S403、根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间。
根据在步骤S401中获取的子帧配置,UE可确定上行子帧的位置,从而获得在该子帧配置下的连续上行传输时间,连续上行传输时间包括特殊子帧中的UpPTS和该UpPTS之后的连续上行子帧。如图8-a所示,根据子帧配置0,连续上行传输时间包括每个特殊子帧中的UpPTS和之后的连续3个上行子帧。
S404、判断本次Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧是否属于子帧配置中的连续上行子帧。
例如,UE本次收到对子帧2的Uplink Grant信令,上一次接收到对子帧9的Uplink Grant信令,则UE判断本次授权信令指示的子帧2与上一次授权信令指示的子帧9是否属于子帧配置中的连续上行子帧。
S405、若本次Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧,根据CCA时间的配置信息和Uplink Grant信令确定上行信道占用时间的起始时刻。
因为子帧2和子帧9不属于连续的上行子帧,即本次Uplink Grant指示的上行子帧与上一次Uplink Grant指示的上行子帧不属于子帧配置中的连续上行子帧。因此,本次Uplink Grant需要触发空闲信道检测,在子帧2所在的连续子帧之前的最近的CCA时间中启动空闲信道检测,即在子帧1的GP中进行空闲信道检测,将空闲信道检测结束时刻,即子帧1的UpPTS的起始时刻设定为信道占用时间的起始时刻。
若UE又收到对子帧3的Uplink Grant信令,由于子帧3和子帧2属于子帧配置中的连续上行子帧,UE在接收到对子帧2的Uplink Grant时已启动了空闲信道检测,并且子帧3和子帧2属于同一个信道占用时间中,因此接收到对子帧3的Uplink Grant时不用触发空闲信道检测。
S406、将上行信道占用时间的起始时刻之后的连续上行传输时间设定为上行信道占用时间。
将上述上行信道占用时间的起始时刻之后的连续上行传输时间设定为上行信道占用时间。如图8-b所示,上行信道占用时间的起始时刻为子帧1的
UpPTS的起始时刻,将从子帧1的UpPTS开始到后续的3个连续上行子帧设定为上行信道占用时间。
本发明的又一实施例,实施例五提供了一种非授权频段信道占用时间的配置方法,用于UE在基于帧结构的LBT机制下确定下行信道占用时间,参见图10,图10为本发明实施例五的流程示意图,本发明实施例五提供的方法包括步骤:
S501、获取TDD LTE系统中的子帧配置。
基站通过发送系统广播将TDD系统子帧配置方式通知给小区中的UE,UE接收系统广播后获知基站所使用的子帧配置方式,从而获得每个无线帧中上下行子帧的位置。例如,若系统使用子帧配置3,UE可知从子帧0到子帧9的上下行属性为DSUUUDDDDD,其中D代表下行子帧,U代表上行子帧,S代表特殊子帧。
在TDD制式的LTE系统中,还可根据业务到达的状态进行灵活的TDD配置,根据业务到达状态设定后续一个或多个无线帧中每个子帧是上行子帧或下行子帧,这样无线帧中的上行、下行子帧不一定按照子帧配置3那样出现。
S502、接收非授权频段的下行CCA时间的配置信息。
在基于帧结构的LBT机制下,下行CCA时间的配置信息包括:CCA时间长度、CCA时间子帧偏移、CCA时间周期。下行CCA时间可配置在特殊子帧的DwPTS、下行子帧或紧挨下行子帧的上行子帧上。基站将上述CCA时间的配置信息通过CCA时间的指示消息发送给UE。UE可确定每个周期CCA时间的起始时刻。举例来说,将CCA时间配置在上行子帧4,CCA时间长度20us,CCA时间周期为10ms。下行CCA时间的指示消息可以为RRC重配置消息或系统广播消息。UE收到下行CCA配置信息后UE可知每个可能的CCA时间位于每个无线帧的子帧4中。
S503、根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间。
根据步骤S501获取的子帧配置,UE确定在每个无线帧中可以进行下行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的
DwPTS。如图11所示,根据子帧配置3,连续下行传输时间包括子帧5至子帧9、下一个无线帧的子帧0以及其后的DwPTS。
S504、根据CCA时间的配置信息确定下行信道占用时间的起始时刻。
根据步骤S502中接收的下行CCA时间的配置消息,可确定下行信道占用时间的起始时刻。将每个下行CCA时间的结束时刻设定为下行信道占用时间的起始时刻,如图11所示,CCA时间配置在每个无线帧的子帧4中,CCA时间长度20us,将空闲信道检测结束时刻,即子帧5的开始时刻设定为下行信道占用时间的起始时刻。
S505、将下行信道占用时间的起始时刻之后的连续下行传输时间设定为上行信道占用时间。
将上述下行占用时间的起始时刻之后的连续下行传输时间设定为上行信道占用时间。如图11所示,下行占用时间的起始时刻为子帧5的起始时刻,将子帧5至子帧9、下一个无线帧的子帧0以及其后的DwPTS设定为下行信道占用时间。
可以看出,使用本发明实施例提供的技术方案,在基于帧结构的LBT机制下,可以使UE根据下行CCA时间的配置信息和TDD系统的上下行子帧配置,确定下行信道占用时间,从而使UE在非下行信道占用时间关闭接收机以达到省电的目的。
本发明的再一个实施例,实施例六提供了一种非授权频段信道占用时间的配置方法,用于在基于负载的LBT机制下UE确定下行信道占用时间,参见图12,图12为本发明实施例六的流程示意图,本发明实施例六提供的方法包括步骤:
S601、获取TDD LTE系统中的子帧配置。
基站通过发送系统广播将TDD系统子帧配置方式通知给小区中的UE,UE接收系统广播后获知基站所使用的子帧配置方式,从而获得每个无线帧中上下行子帧的位置。例如,若系统使用子帧配置3,UE可知从子帧0到子帧9的上下行属性为DSUUUDDDDD,其中D代表下行子帧,U代表上行子帧,S代表特殊子帧。基站还可根据业务到达的状态进行灵活的TDD配置,根据业
务到达状态设定后续一个或多个无线帧中每个子帧是上行子帧或下行子帧,这样无线帧中的上行、下行子帧不一定按照子帧配置3那样出现。
S602、接收Reservation Signal信号。
当基站检测到信道空闲后,可以通过发送Reservation Signal指示UE基站将使用后续的下行子帧向UE发送下行数据,Reservation Signal占用一个下行子帧的一个或几个符号,UE接收到该Reservation Signal后即可知道在接收到该Reservation Signal的当前下行子帧的某个符号或下一个最近的下行子帧基站开始占用信道发送下行数据。
S603、根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间。
根据步骤S501获取的子帧配置,UE确定在每个无线帧中可以进行下行传输的位置,从而获得在所述子帧配置方式下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS。如图13-a所示,根据子帧配置3,连续下行传输时间包括子帧5至子帧9、下一个无线帧的子帧0以及其后的DwPTS。
S604、根据接收的Reservation Signal信号确定下行信道占用时间的起始时刻。
在基于负载的LBT机制下,当UE接收到Reservation Signal时,可知基站将使用后续的下行子帧向该UE发送下行数据,接收到Reservation Signal的时刻即为下行信道占用时间的起始时刻。例如,若UE在子帧6收到Reservation Signal,则接收到Reservation Signal的时刻为下行信道占用时间的起始时刻。
S605、判断Reservation Signal是否指示最大下行信道占用时间。
S606、若Reservation Signal不指示最大下行信道占用时间,将下行信道占用时间的起始时刻之后的连续下行传输时间设定为下行信道占用时间。
将收到上述Reservation Signal之后的连续下行传输时间设定为下行信道占用时间。
如图13-b所示,UE在子帧6收到Reservation Signal,将收到Reservation Signal之后的子帧6至子帧9、下个无线帧的子帧0以及其后的DwPTS设定
为下行信道占用时间。
S607、若Reservation Signal指示最大下行信道占用时间,确定最大下行信道占用时间终止时刻,将下行信道占用时间的起始时刻和最大下行信道占用时间终止时刻之间的连续上行传输时间设定为上行信道占用时间。
举例来说,Reservation Signal通过占用2个符号指示最大下行信道占用时间为子帧6及其后2个子帧,如图13-c所示,则将子帧6之后2个子帧即子帧8的结束时刻设为最大下行信道占用时间终止时刻,将接收到Reservation Signal的时刻至子帧8的终止时刻之间的连续下行传输时间设定为下行信道占用时间。
可以看出,使用本发明实施例提供的技术方案,在基于负载的LBT机制下,可以使UE根据基站发送的Reservation Signal和TDD系统的上下行子帧配置,确定下行信道占用时间,从而使UE在非下行信道占用时间关闭接收机以达到省电的目的。
本发明的再一个实施例,实施例七提供了一种非授权频段信道占用时间的配置方法,用于UE确定上行信道占用时间,参见图14,图14为本发明实施例七的流程示意图,本发明实施例七提供的方法包括步骤:
S701、获取TDD LTE系统中的子帧配置。
采用实施例三的例子,设定系统使用的子帧配置为子帧配置0,UE读取系统广播后可知从子帧0到子帧9的上下行属性为DSUUUDSUUU。
S702、接收非授权频段的上行CCA时间的配置信息和Uplink Grant信令。
采用实施例三的例子,在基于帧结构的LBT机制下,CCA时间配置在特殊子帧中的GP,CCA时间长度为20us,CCA时间周期配置为5ms,收到上行CCA配置信息后UE可知每个可能的CCA时间位于每个特殊子帧的UpPTS开始之前在GP中的20us。UE接收到Uplink Grant后可触发空闲信道检测。
S703、根据CCA时间的配置信息和Uplink Grant信令确定上行信道占用时间的起始时刻。
例如,若UE接收到对子帧2和子帧3的Uplink Grant信令,即该Uplink Grant信令同时调度子帧2和子帧3。接收到Uplink Grant后触发空闲信道检测,
在子帧2所在的连续子帧之前的最近的CCA时间中启动空闲信道检测,即在子帧1的GP中进行空闲信道检测。在子帧1的GP结束时UpPTS开始时刻设定为上行信道占用时间的起始时刻。
S704、根据上行信道占用时间的起始时刻和Uplink Grant信令确定上行信道占用时间。
将所述上行信道占用时间的起始时刻之后的Uplink Grant允许连续发送的上行传输子帧设定为上行信道占用时间。本次接收的Uplink Grant信令允许连续发送的上行传输子帧是子帧2和子帧3,因此将子帧2和子帧3设定为上行信道占用时间。
可以看出,使用本发明实施例提供的技术方案,可以使UE根据上行CCA时间的指示消息和Uplink Grant信令允许连续发送的上行传输子帧,确定上行信道占用时间,从而进行数据发送。
本发明实施例八提供了一种终端设备,该终端设备可采用本发明提出的一种非授权频段信道占用时间的配置方法,即可以执行由上述实施例一至实施例七中提供的非授权频段信道占用时间的配置方法中的各个步骤。参见图15,所述终端设备a00可包括:
接收单元a10,用于获取TDD LTE系统中的子帧配置;还用于接收非授权频段的CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。
处理单元a20,用于根据所述接收单元获取的所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
在一些可行的实施方式中,接收单元a10还用于,接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间;所述信令消息包括RRC消息、PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间。
在一些可行的实施方式中,所述处理单元a20还用于,根据所述接收单元获取的所述子帧配置、所述最大信道占用时间和所述接收单元接收的所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信
道占用时间进行数据发送和数据接收。
所述接收单元a10接收的子帧配置包括TDD系统预设的子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
在一些可行的实施方式中,处理单元a20根据所述接收单元获取的所述子帧配置和所述CCA时间的指示消息确定上行信道占用时间:根据所述接收单元a10获得的所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间,所述连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧,再根据所述接收单元a10接收的所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。若接收单元a10接收到用于指示最大信道占用时间的信令消息,处理单元a20根据所述上行信道占用时间的起始时刻和所述接收单元a10获取的所述最大上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
其中,接收单元a10接收的上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可。
在一些可行的实施方式中,当接收单元a10接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则处理单元a20启动上行CCA,并将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻。
在一些可行的实施方式中,处理单元a20通过接收的上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧,将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
在一些可行的实施方式中,处理单元a20根据所述接收单元获取的所述子帧配置和所述CCA时间的指示消息确定下行信道占用时间:根据所述接收单元获取的所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行
导频时隙DwPTS;根据所述所述接收单元接收的下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。若接收单元a10接收到用于指示最大信道占用时间的信令消息,处理单元a20根据所述下行信道占用时间的起始时刻和所述接收单元a10获得的最大信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
在一些可行的实施方式中,若在非授权频段上的LBT机制为基于负载的LBT机制,接收单元a10接收的下行CCA时间的指示消息为Reservation Signal信号。当接收单元a10接收到Reservation Signal信号时,处理单元a20将接收到所述Reservation Signal信号的时刻设定为所述下行信道占用时间的起始时刻。
本发明实施例九又提供了一种终端设备,参见图16,本发明实施例八提供的基站设备b00可包括:至少一个处理器b10、总线b20、与总线相连的至少一个与存储器b30和通信接口b40。
其中,所述存储器b30用于存储计算机执行指令,处理器b10通过总线b20,调用存储器b30中存储的计算机执行指令并执行该指令。接收外部设备发送的数据时,由所述通信接口b40用于从外部设备接收数据,通过总线b20写入存储器b30,然后由处理器b10对写入存储器b30的数据进行处理;向外部设备发送数据时,处理器b10把处理完成的数据通过总线写入存储器b30,然后通过总线b20把处理完成的数据发送给通信接口b40,最后通信接口b40把所述数据发送给外部设备。以使终端设备执行如实施例一至六中的方法。
通信接口b40接收TDD LTE系统中的子帧配置,并接收非授权频段的CCA时间的指示消息,将接收到的子帧配置和CCA时间的指示消息保存在存储器b30中供处理器b10处理。所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息。
处理器b10根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
在一些可行的实施方式中,通信接口b40还可接收用于指示最大信道占用时间的信令消息,以在存储器b30中存储最大信道占用时间;所述信令消息包括RRC消息、PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间。
在一些可行的实施方式中,处理器b10还可以根据获取的所述子帧配置、最大信道占用时间和接收的所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
通过通信接口b40接收的子帧配置包括TDD系统预设的子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
在一些可行的实施方式中,处理器b10根据获取的子帧配置和CCA时间的指示消息确定上行信道占用时间:根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间,连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧,再根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。若通信接口b40接收到用于指示最大信道占用时间的信令消息,处理器b10根据所述上行信道占用时间的起始时刻和所述最大上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
其中,通过通信接口b40接收的上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可。
在一些可行的实施方式中,当通信接口b40接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则处理器b10启动上行CCA,并将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻。
在一些可行的实施方式中,处理器b10通过接收的上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧,将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
在一些可行的实施方式中,处理器b10根据所述接收单元获取的子帧配置和所述CCA时间的指示消息确定下行信道占用时间:根据所述通过通信接口b40接收的所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行导频时隙DwPTS;根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。若通信接口b40接收到用于指示最大信道占用时间的信令消息,处理器b10根据所述下行信道占用时间的起始时刻和从所述用于指示最大信道占用时间的信令消息中获得的最大信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
在一些可行的实施方式中,若在非授权频段上的LBT机制为基于负载的LBT机制,通过通信接口b40接收的下行CCA时间的指示消息为Reservation Signal信号。当通信接口b40接收到Reservation Signal信号后,处理器b10将接收到所述Reservation Signal信号的时刻设定为所述下行信道占用时间的起始时刻。
综上所述,本发明实施例九提供的终端设备可用于实现本发明实施例一至七提供的非授权频段的信道占用时间的配置方法所述的各个步骤,不再赘述。
本领域普通技术人员将会理解,本发明的各个方面、或各个方面的可能实现方式可以被具体实施为系统、方法或者计算机程序产品。此外,本发明的各方面、或各个方面的可能实现方式可以采用计算机程序产品的形式,计算机程序产品是指存储在计算机可读介质中的计算机可读程序代码。
计算机可读介质可以是计算机可读数据介质或者计算机可读存储介质。计算机可读存储介质包含但不限于电子、磁性、光学、电磁、红外或半导体系统、设备或者装置,或者前述的任意适当组合,如随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM或者快闪存储器)、光纤、便携式只读存储器(CD-ROM)。
计算机中的处理器读取存储在计算机可读介质中的计算机可读程序代码,
使得处理器能够执行在流程图中每个步骤、或各步骤的组合中规定的功能动作;生成实施在框图的每一块、或各块的组合中规定的功能动作的装置。
计算机可读程序代码可以完全在用户的计算机上执行、部分在用户的计算机上执行、作为单独的软件包、部分在用户的本的计算机上并且部分在远程计算机上,或者完全在远程计算机或者服务器上执行。也应该注意,在某些替代实施方案中,在流程图中各步骤、或框图中各块所注明的功能可能不按图中注明的顺序发生。例如,依赖于所涉及的功能,接连示出的两个步骤、或两个块实际上可能被大致同时执行,或者这些块有时候可能被以相反顺序执行。
以上对本发明实施例公开的一种非授权频段的数据传输的方法及装置进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。
Claims (20)
- 一种非授权频段信道占用时间的配置方法,其特征在于,包括:获取时分双工TDD长期演进LTE系统中的子帧配置;接收非授权频段的空闲信道检测CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息;根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
- 根据权利要求1所述的方法,其特征在于,所述接收非授权频段上的CCA时间的指示消息之后,所述方法还包括:接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间;所述信令消息包括无线资源控制RRC消息、物理层下行控制信道PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间;根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
- 根据权利要求1所述的方法,其特征在于,所述根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧;根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。
- 根据权利要求2所述的方法,其特征在于,所述根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:根据所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时 间;所述连续上行传输时间包括UpPTS和所述UpPTS之后的连续上行子帧;根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;根据所述上行信道占用时间的起始时刻和所述最大上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
- 根据权利要求3或4所述的方法,其特征在于,所述上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可;所述根据所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻,包括:当接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则启动上行CCA,并将所述CCA时间的结束时刻设定为上行信道占用时间的起始时刻。
- 根据权利要求5所述的方法,其特征在于,所述将所述CCA时间的结束时刻设定为上行信道占用时间的起始时刻之后,所述方法还包括:通过接收的上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧;将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
- 根据权利要求1所述的方法,其特征在于,所述根据所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,包括:根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行导频时隙DwPTS;根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。
- 根据权利要求2所述的方法,其特征在于,所述根据所述子帧配置、所述最大信道占用时间和所述CCA时间的指示消息,确定在非授权频段上的 信道占用时间,包括:根据所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS;根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;根据所述下行信道占用时间的起始时刻和所述最大下行信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
- 根据权利要求7或8所述的方法,其特征在于,若在非授权频段上的LBT机制为基于负载的LBT机制,所述下行CCA时间的指示消息为所述信道预留信号;所述根据所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻,包括:当接收到所述信道预留信号时,将接收到所述信道预留信号的时刻设定为所述下行信道占用时间的起始时刻。
- 根据权利要求1所述的方法,其特征在于,所述子帧配置包括:预设子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
- 一种终端设备,其特征在于,包括:接收单元,用于获取TDDLTE系统中的子帧配置;所述接收单元,还用于接收非授权频段的CCA时间的指示消息,所述CCA时间的指示消息包括上行CCA时间的指示消息和下行CCA时间的指示消息;处理单元,用于根据所述接收单元获取的所述子帧配置和所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
- 根据权利要求11所述的设备,其特征在于,所述接收单元还用于:接收用于指示最大信道占用时间的信令消息,以获得最大信道占用时间;所述信令消息包括RRC消息、PDCCH信令或信道预留信号,所述最大信道占用时间包括最大上行信道占用时间和最大下行信道占用时间;所述处理单元还用于,根据所述接收单元获取的所述子帧配置、所述最大信道占用时间和所述接收单元接收的所述CCA时间的指示消息,确定在非授权频段上的信道占用时间,并根据所述信道占用时间进行数据发送和数据接收。
- 根据权利要求11所述的设备,其特征在于,所述处理单元具体用于:根据所述接收单元获得的所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括上行导频时隙UpPTS和所述UpPTS之后的连续上行子帧;根据所述接收单元接收的所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;将所述上行信道占用时间的起始时刻之后的所述连续上行传输时间设定为上行信道占用时间。
- 根据权利要求12所述的设备,其特征在于,所述处理单元具体用于:根据所述接收单元获取的所述子帧配置,获得在所述子帧配置下无线帧中的连续上行传输时间;所述连续上行传输时间包括UpPTS和所述UpPTS之后的连续上行子帧;根据所述接收单元接收的所述上行CCA时间的指示消息,确定上行信道占用时间的起始时刻;根据所述上行信道占用时间的起始时刻和所述接收单元获得的所述最大上行信道占用时间确定最大上行信道占用时间终止时刻,将所述上行信道占用时间的起始时刻和所述最大上行信道占用时间终止时刻之间的所述连续上行传输时间设定为上行信道占用时间。
- 根据权利要求13或14所述的设备,其特征在于,所述接收单元接收的所述上行CCA时间的指示消息包括上行CCA时间的配置信息和上行授权许可;所述处理单元具体用于:当接收单元接收到上行授权许可时,若由该上行授权许可指示的上行子帧与上一次上行授权许可指示的上行子帧不属于子帧配置下的连续上行子帧,则启动上行CCA,并将所述CCA时间的结束时刻设定为下一个上行信道占用时间的起始时刻。
- 根据权利要求15所述的设备,其特征在于,所述处理单元还用于:通过接收单元接收的所述上行授权许可,获得所述上行授权许可允许连续发送的上行传输子帧;将所述上行信道占用时间的起始时刻之后的所述上行授权许可允许连续发送的上行传输子帧设定为上行信道占用时间。
- 根据权利要求11所述的设备,其特征在于,所述处理单元具体用于:根据所述接收单元获取的所述子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的下行导频时隙DwPTS;根据所述接收单元接收的下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;将所述下行信道占用时间的起始时刻之后的所述连续下行传输时间设定为下行信道占用时间。
- 根据权利要求12所述的设备,其特征在于,所述处理单元具体用于:根据所述接收单元获取的子帧配置,获得在所述子帧配置下无线帧中的连续下行传输时间,所述连续下行传输时间包括连续下行子帧和所述连续下行子帧之后的DwPTS;根据所述接收单元接收的所述下行CCA时间的指示消息,确定下行信道占用时间的起始时刻;根据所述下行信道占用时间的起始时刻和所述接收单元获得的所述最大下行信道占用时间确定最大下行信道占用时间终止时刻,将所述下行信道占用时间的起始时刻和所述最大下行信道占用时间终止时刻之间的所述连续下行传输时间设定为下行信道占用时间。
- 根据权利要求17或18所述的设备,其特征在于,若在非授权频段上的LBT机制为基于负载的LBT机制,所述接收单元接收的下行CCA时间的指示消息为所述信道预留信号;所述处理单元用于:当所述接收单元接收到所述信道预留信号时,将接收到所述信道预留信号的时刻设定为所述下行信道占用时间的起始时刻。
- 根据权利要求11所述的设备,其特征在于,所述接收单元获取的所 述子帧配置包括:预设子帧配置,或基站根据业务特性或信道状况临时设置的子帧配置。
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Also Published As
| Publication number | Publication date |
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| CN105578573A (zh) | 2016-05-11 |
| CN105578573B (zh) | 2019-02-01 |
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