WO2017020695A1 - 一种数据传输方法和装置 - Google Patents
一种数据传输方法和装置 Download PDFInfo
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- WO2017020695A1 WO2017020695A1 PCT/CN2016/090306 CN2016090306W WO2017020695A1 WO 2017020695 A1 WO2017020695 A1 WO 2017020695A1 CN 2016090306 W CN2016090306 W CN 2016090306W WO 2017020695 A1 WO2017020695 A1 WO 2017020695A1
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- 238000004891 communication Methods 0.000 claims abstract description 107
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0825—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
- LTE Long Term Evolution
- U-LTE or LTE-U The unlicensed LTE (Unlicensed LTE, U-LTE or LTE-U) is deployed to enhance the user experience and extended coverage.
- the unlicensed spectrum is not planned for a specific application system, and can be shared by various wireless communication systems such as Bluetooth, WIFI, etc., and the shared unlicensed spectrum resources are used by multiple systems by preempting resources.
- LBT Listening Before Talk
- CSMA/CA Clear Channel Assessment
- ETSI European Telecommunications Standards Institute
- FBE Frame Based Equipment
- LBE Load Based Equipment
- LTE-U Since the LTE-U is a network system controlled by the central node, the user equipment (User Equipment, UE) can only contend with the eNB and can successfully receive the uplink grant (Up Link grant, UL-grant) before contending for the channel. Therefore, LTE -U uplink access opportunity is not equal to WIFI. If LTE-U adopts the existing channel access mechanism, LTE-U requires support for uplink multi-user frequency division multiplexing (UL MU-FDM; Multiple User Frequency Division Multiplexing (MU-FDM)) and uplink multi-user space division multiplexing. (UL MU-SDM; Multiple User Space Division Multiplexing, MU-SDM).
- UL MU-FDM Multiple User Frequency Division Multiplexing
- MU-SDM Multiple User Space Division Multiplexing
- LAA Licensed Assisted Access
- the LTE-U adopts the existing channel access mechanism, and the channel access capability is poor. If multiple user equipments cannot access at the same time, congestion between user equipments in the same cell is also likely to occur.
- the embodiment of the present invention provides a data transmission method and device, which are used to solve the problem that the LTE-U adopts the existing channel access mechanism, and the channel access capability is poor. If multiple user equipments cannot access at the same time, it is easy to occur. The problem of blocking between user equipments in the same cell.
- the communication device sends a signal within a conversion duration between the downlink subframe and the uplink subframe to occupy the current channel;
- the communication device performs data transmission through the current channel.
- the signal includes a placeholder signal for indicating that the current channel is occupied.
- the signal further includes: a downlink signal sent by the network device to the user equipment;
- the signal further includes: an uplink signal sent by the user equipment to the network device.
- the communication device is a network device, and a start time of the signal is a start time of the conversion time, and a first interval time between an end time of the signal and an end time of the conversion time is less than Or equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration.
- the communication device is a network device
- the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration
- the communication is The device is a user equipment, and the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the second interval duration is greater than or equal to the minimum guard duration
- the first interval duration is an interval duration between an end time of the signal and an end time of the conversion duration
- the second interval duration is a start time of the signal and the conversion duration The interval between the start times.
- the communication device is a user equipment, and a second interval duration between a start time of the signal and a start time of the conversion duration is less than or equal to a set time interval, and the second interval duration is Greater than or equal to the minimum protection duration.
- the communication device is a user equipment
- the method further includes: the communication device performing clean channel assessment CCA detection on the current channel on a time slot used for channel detection in the conversion duration ;
- Transmitting, by the communications device, the signal within the transition time period includes: if the current channel is detected to be in an idle state, the communications device transmits the signal within the transition time period.
- the communication device is a user equipment
- the signal is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the end of the conversion duration, where the signal is The second interval duration between the start time and the start time of the conversion duration is less than or equal to the set time interval.
- the user equipment determines an uplink signal that needs to be sent to the network device
- the user equipment sends the uplink signal after the conversion duration between the downlink subframe and the uplink subframe or after the conversion duration ends.
- the interval between the start time of the uplink signal and the end time of the signal sent by the network device during the conversion duration is greater than or equal to the set guard time.
- the method further includes: the user equipment performing CCA detection on a time slot for channel detection in the conversion duration;
- the user equipment sends the uplink signal by using a current channel.
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied;
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- a signal sending module configured to send a signal within a guard interval conversion time period between the downlink subframe and the uplink subframe to occupy the current channel
- a data transmission module configured to perform data transmission by using the current channel.
- the signal includes a placeholder signal for indicating that the current channel is occupied.
- the signal further includes: a downlink signal sent by the network device to the user equipment;
- the signal further includes: an uplink signal sent by the user equipment to the network device.
- the communication device is a network device, and a start time of the signal is a start time of the conversion time, and a first interval time between an end time of the signal and an end time of the conversion time is less than Or equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration.
- the communication device is a network device
- the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration
- the communication is The device is a user equipment, and the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the second interval duration is greater than or equal to the minimum guard duration
- the first interval duration is an interval duration between an end time of the signal and an end time of the conversion duration
- the second interval duration is a start time of the signal and the conversion duration Interval between the beginnings duration
- the communication device is a user equipment, and a second interval duration between a start time of the signal and a start time of the conversion duration is less than or equal to a set time interval, and the second interval duration is Greater than or equal to the minimum protection duration.
- the communication device is a user equipment, and the communication device further includes:
- a CCA detecting module configured to perform CCA detection on the current channel on a time slot used for channel detection in the conversion duration
- the signal sending module is specifically configured to: if the CCA detecting module detects that the current channel is in an idle state, send the signal within the conversion duration.
- the communication device is a user equipment
- the signal is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the end of the conversion duration, where the signal is The second interval duration between the start time and the start time of the conversion duration is less than or equal to the set time interval.
- a user equipment where the user equipment includes:
- An uplink signal determining module configured to determine an uplink signal that needs to be sent to the network device
- the uplink signal sending module is configured to send the uplink signal after the conversion duration between the downlink subframe and the uplink subframe or after the conversion duration ends.
- the interval between the start time of the uplink signal and the end time of the signal sent by the network device during the conversion duration is greater than or equal to the set guard time.
- the user equipment further includes:
- a CCA detection module configured to perform CCA detection on a time slot for channel detection within the conversion duration
- the uplink signal sending module is specifically configured to: if the CCA detecting module detects that the current channel is in an idle state, use the current channel to send the uplink signal.
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied;
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- Another communication device includes a transceiver and at least one processor connected to the transceiver, wherein:
- a processor for reading a program in the memory performing the following process:
- the triggering transceiver transmits a signal within a conversion duration between the downlink subframe and the uplink subframe to occupy the current channel; and performs data transmission through the current channel.
- the signal includes a placeholder signal for indicating that the current channel is occupied.
- the signal further includes: a downlink signal sent by the network device to the user equipment;
- the signal further includes: an uplink signal sent by the user equipment to the network device.
- the communication device is a network device
- a start time of the signal is a start time of the conversion time
- a sum of a second interval duration and a first interval duration is less than or equal to a set time interval, and the first interval duration is greater than or equal to a minimum guard duration;
- the communication device is a user equipment, and the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the second interval duration is greater than or equal to the minimum guard duration;
- the first interval duration is an interval duration between an end time of the signal and an end time of the conversion duration
- the second interval duration is a start time of the signal and the conversion duration The interval between the start times.
- the communication device is a user equipment, and a second interval duration between a start time of the signal and a start time of the conversion duration is less than or equal to a set time interval, and the second interval The duration is greater than or equal to the minimum protection duration.
- the communication device is a user equipment
- the processor further performs: performing CCA detection on the current channel on a time slot for channel detection in the conversion duration; and detecting that the current channel is in an idle state,
- the trigger transceiver transmits the signal for the duration of the transition.
- the communication device is a user equipment
- the signal is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the end of the conversion duration, where the signal is The second interval duration between the start time and the start time of the conversion duration is less than or equal to the set time interval.
- Another user equipment includes a transceiver, and at least one processor connected to the transceiver, where:
- a processor for reading a program in the memory performing the following process:
- Determining an uplink signal that needs to be sent to the network device triggering, by the transceiver, the uplink signal after the conversion duration between the downlink subframe and the uplink subframe or after the conversion duration ends.
- the interval between the start time of the uplink signal and the end time of the signal sent by the network device during the conversion duration is greater than or equal to the set guard time.
- the processor further executes:
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- the communication device sends a signal within a conversion duration between the downlink subframe and the uplink subframe to occupy the current channel; the communication device performs data transmission through the current channel.
- FIG. 1 is a schematic flowchart of a first data transmission method according to an embodiment of the present invention
- 2A is a schematic diagram of a manner of sending a signal sent by a first network device in a GP according to an embodiment of the present invention
- 2B is a schematic diagram of a manner of sending a signal sent by a second network device in a GP according to an embodiment of the present disclosure
- 2C is a schematic diagram of a manner of sending a signal sent by a first user equipment in a GP according to an embodiment of the present invention
- 2D is a schematic diagram of a manner of sending a signal sent by a second user equipment in a GP according to an embodiment of the present invention
- 2E is a schematic diagram of a manner of sending a signal sent by a third user equipment in a GP according to an embodiment of the present invention
- 2F is a schematic diagram of a manner of sending a signal sent by a user equipment in a GP according to an embodiment of the present invention
- 2G is a schematic diagram of a manner of sending a signal sent by a user equipment in a GP according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a second data transmission method according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of a first communication device according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a first user equipment according to an embodiment of the present disclosure.
- FIG. 6 is a schematic diagram of a second communication device according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of a second user equipment according to an embodiment of the present invention.
- the base station and/or the user equipment sends a signal in a conversion duration between the downlink subframe and the uplink subframe of the unlicensed frequency band to occupy the current channel, so that the current channel can be accessed for data transmission, and the complexity is realized.
- Low and can solve the problem that the uplink (Up Link, UL) access opportunity is not as good as WIFI, which is beneficial to realize MU-FDM and MU-SDM, avoiding the loss of LAA performance and the waste of radio resources.
- the conversion duration such as the Guard Period (GP), may also be referred to as a transition interval between a downlink subframe and an uplink subframe.
- FIG. 1 A data transmission method provided by an embodiment of the present invention is shown in FIG. 1 , and the method includes:
- the communication device sends a signal in a GP between the downlink subframe and the uplink subframe to occupy the current channel.
- the communication device performs data transmission through the current channel.
- the communication device sends a signal in the GP between the downlink subframe and the uplink subframe to occupy the current channel; the communication device performs data transmission through the current channel.
- the GP is located in a special subframe, and its size is determined by the coverage of the base station. According to the current LTE protocol, the GP is at least one Orthogonal Frequency Division Multiplex (OFDM) symbol.
- OFDM Orthogonal Frequency Division Multiplex
- the LTE protocol stipulates that the GP is an idle period, and no signal is sent in the GP of the licensed frequency band; however, in the unlicensed frequency band, this period of time may cause the WIFI device to access the current channel, and if the UL transmission is not required for LBT operation, DL and UL
- the allowable time interval may be only about 20 ⁇ s. Therefore, in order to prevent the WIFI device from accessing the current channel, a signal may be transmitted in the GP to occupy the current channel, so that the WIFI device detects the signal when performing channel detection. The WIFI device will not occupy the channel.
- the embodiment of the present invention is applicable to other transmission modes except for the LTE TDD transmission mode applicable to the unlicensed frequency band, as long as the transmission mode of the guard interval GP is configured between the downlink subframe and the uplink subframe in the uplink and downlink subframe configuration.
- the technical solution provided by the embodiment of the present invention is used.
- the communication device may be a network device such as a base station or the like; the communication device may also be a user device.
- the communication device is a network device and the communication device is a user device.
- the communication device is a network device.
- the signal transmitted by the network device in the GP includes a reservation signal for indicating that the current channel is occupied.
- the placeholder signal occupies at least one fractional OFDM symbol, that is, the placeholder signal occupies at least OFDM Part of the symbol.
- the signal sent by the network device in the GP further includes: a downlink signal sent by the network device to the user equipment.
- the network device also sends a preamble signal in the GP for assisting user equipment synchronization and the like.
- the transmission of signals transmitted by the network device within the GP includes the following two preferred implementations:
- the start time of the signal sent by the network device in the GP is the start time of the GP
- the first interval time between the end time of the signal sent by the network device in the GP and the end time of the GP is less than Or equal to the set time interval
- the first interval duration is greater than or equal to the minimum guard duration
- the set time interval is the longest time interval in which CCA detection is not performed before the channel is occupied.
- the minimum protection duration is related to the system coverage distance, and the larger the coverage distance, the larger the minimum protection duration.
- the length of the GP is greater than or equal to the minimum guard duration, and the GP includes at least one OFDM symbol.
- the user equipment may directly perform uplink transmission without performing CCA detection within a set time interval after the DL signal transmitted by the network device ends.
- the starting time of the UL signal sent by the user equipment is the starting time of the uplink subframe after the GP ends, or the starting time of the UL signal sent by the user equipment is in the GP. If the user equipment sends a UL signal, the starting time is within the GP.
- the GP sends a reservation signal at the start time of the GP until the end time of the GP is X ⁇ s (ie, the first interval duration), and X is less than or equal to The time interval.
- the successfully scheduled UE may perform uplink transmission without performing CCA detection.
- the frame structure in the figure is merely illustrative and not limiting, and the embodiment of the present invention can also be applied to frame configurations of other configurations.
- the method further includes:
- the user equipment performs CCA detection on a time slot for channel detection, where the time slot for channel detection is located in the GP or in a subframe after the GP ends;
- the signal is sent using the current channel
- the current channel is discarded.
- the base station first sends a placeholder signal in the GP.
- the successfully scheduled UE listens to the current channel in the CCA slot in the GP. If the current channel is idle, the channel is accessed. If the current channel is If you are busy, you will give up this access.
- the UE immediately transmits a signal after accessing the channel in the GP, and the signal may be one of a place signal, an uplink data, or a pilot signal.
- the base station sends a placeholder signal in the GP, which can shorten the idle time in the GP, and is beneficial to the LTE-U access channel.
- the second time between the start time of the signal sent by the network device in the GP and the start time of the GP are less than or equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration.
- the user equipment may directly perform uplink transmission without performing CCA detection within a set time interval after the DL signal transmitted by the network device ends.
- the GP is in a special subframe
- the base station sends a reservation signal at X1 ⁇ s at the start time of the GP until the end time of the GP is X2 ⁇ s, and the sum of X1 and X2 is less than or equal to The time interval.
- the successfully scheduled UE may perform uplink transmission without performing CCA detection.
- the method further includes:
- the user equipment performs clean channel estimation CCA detection on the time slot for channel detection, where the time slot for channel detection is located in the GP or in the subframe after the GP ends;
- the signal is sent using the current channel
- the current channel is discarded.
- the GP is in a special subframe, and the base station transmits a reservation signal at X1 ⁇ s at the start time of the GP until the end time of the GP is X2 ⁇ s, and the sum of X1 and X2 is less than or equal to The time interval.
- the UE that is successfully scheduled monitors the current channel in the CCA slot in the GP. If the current channel is idle, the channel is accessed. If the current channel is busy, the access is abandoned; the UE accesses the channel in the GP.
- the signal is transmitted immediately after, and the signal may be one of a place signal, an uplink data, or a pilot signal.
- the base station sends a placeholder signal in the GP, which can shorten the idle time in the GP, and is beneficial to the LTE-U access channel.
- the GP in the embodiment of the present invention may be configured in other locations except that it may be in a special subframe.
- the CCA detection uses energy detection to determine whether the current channel has signal transmission, thereby determining whether the channel is occupied.
- the communication device is a user equipment.
- the signals transmitted by the user equipment in the GP include the following three preferred implementations:
- Manner 1 The signal sent by the user equipment in the GP includes a occupancy signal for indicating that the current channel is occupied.
- the placeholder signal occupies at least one fractional OFDM symbol, ie the placeholder signal occupies at least a part of the OFDM symbol.
- the signal sent by the user equipment in the GP further includes: an uplink signal sent by the user equipment to the network device.
- an uplink signal sent by the user equipment to the network device For example, uplink data, pilot signals, and the like.
- the sending of the signal sent by the user equipment in the GP includes the following two preferred implementation manners:
- the end time of the signal sent by the user equipment in the GP is the end time of the GP
- the second interval between the start time of the signal sent by the user equipment in the GP and the start time of the GP is less than or It is equal to the set time interval, and the second interval duration is greater than or equal to the minimum guard duration.
- the GP does not transmit any signal (ie, the second interval duration) within the first X ⁇ s in the GP, and the successfully scheduled UE sends a reservation at the start time of the GP through X ⁇ s.
- Signal, X is less than or equal to the set time interval. In this way, the UE may not need to perform CCA detection, and directly perform uplink transmission after the GP ends.
- the second interval duration between the start time of the signal transmitted by the user equipment in the GP and the start time of the GP, and the first interval time between the end time of the transmitted signal and the end time of the GP is less than or equal to the set time interval and greater than or equal to the minimum guard duration.
- the signal sent by the user equipment in the GP is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the GP ends.
- the user equipment needs to send the uplink signal sent to the network device in the uplink subframe after the GP ends to the GP to advance to occupy the current channel. In this manner, the network device and the user equipment do not need to send a placeholder signal in the GP.
- the second interval duration between the start time of the signal sent by the user equipment in the GP and the start time of the GP is less than or equal to the set time interval, and the second interval duration is greater than or equal to the minimum protection. duration.
- the starting point of the uplink transmission of the user equipment is transmitted from the uplink subframe after the GP end to the start time X ⁇ s of the GP, and X is less than or equal to the set time interval. And greater than or equal to the minimum protection duration. Since the start time of the UL transmission is advanced, the end time of the corresponding UL transmission is also advanced. The advancement of the UL transmission start time does not affect the alignment relationship between the authorized primary carrier and the LAA carrier.
- the user equipment sends a signal in the GP to occupy the current channel, so that after the user equipment sends the signal, the user equipment may directly perform uplink transmission without performing CCA detection.
- the third mode the communication device is a user equipment, and before the communication device sends the signal in the GP, the communication device further includes: performing, by the communication device, CCA detection on the current channel in a time slot used for channel detection in the GP;
- the current channel is discarded.
- the signal transmitted by the user equipment includes a occupancy signal for indicating that the current channel is occupied.
- the signal sent by the user equipment in the GP further includes: an uplink signal sent by the user equipment to the network device.
- the manner in which the downlink transmission of the network device has reached the specified maximum channel occupation time, or the minimum protection duration is greater than the set time interval.
- the successfully scheduled UE performs CCA detection in the GP to monitor whether the channel is idle. If the channel is idle, the channel is accessed. If the channel is busy, the access is abandoned.
- the starting position of the CCA detection is generally located at the start time of the GP over a set time interval. The UE immediately transmits a signal after accessing the channel in the GP to occupy the channel.
- the embodiment of the present invention provides another data transmission method, and the execution entity in the data transmission method shown in FIG. 1 corresponds to a network device. As shown in FIG. 3, the method includes:
- the user equipment determines an uplink signal that needs to be sent to the network device.
- the user equipment sends an uplink signal in the GP between the downlink subframe and the uplink subframe or after the GP ends.
- the interval between the start time of the uplink signal sent by the user equipment and the end time of the signal sent by the network device in the GP is greater than or equal to the set guard time duration.
- the method further includes: performing, by the user equipment, CCA detection on a time slot for channel detection in the GP;
- S32 specifically uses the current channel by the user equipment to send an uplink signal.
- the user equipment abandons access to the current channel.
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the uplink signal sent by the user equipment to the network device may be uplink data or a pilot signal.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- the downlink signal sent by the network device to the user equipment may be downlink data or a pilot signal.
- the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
- the embodiment of the present invention further provides a communication device corresponding to the data transmission method shown in FIG. 1.
- the communication device includes:
- the signal sending module 41 is configured to send a signal in a guard interval GP between the downlink subframe and the uplink subframe to occupy the current channel;
- the data transmission module 42 is configured to perform data transmission by using the current channel.
- the signal includes a placeholder signal for indicating that the current channel is occupied.
- the signal further includes: a downlink signal sent by the network device to the user equipment;
- the signal further includes: an uplink signal sent by the user equipment to the network device.
- the communication device is a network device
- a start time of the signal is a start time of the GP
- a first interval duration between an end time of the signal and an end time of the GP is less than or It is equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration.
- the communication device is a network device
- the sum of the second interval duration and the first interval duration is less than or equal to The set interval is greater than or equal to the minimum guard duration
- the communication device is the user equipment
- the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, And the second interval duration is greater than or equal to the minimum guard duration
- the first interval duration is an interval duration between an end time of the signal and an end time of the GP
- the second interval duration is a start time of the signal and a start time of the GP. The interval between the lengths.
- the communication device is a user equipment, and a second interval duration between a start time of the signal and a start time of the GP is less than or equal to a set time interval, and the second interval duration is Greater than or equal to the minimum protection duration.
- the communication device is a user equipment, and the communication device further includes:
- a CCA detection module configured to perform CCA detection on the current channel on a time slot used for channel detection in the GP
- the signal sending module is specifically configured to: if the CCA detecting module detects that the current channel is in an idle state, send the signal in the GP.
- the communication device is a user equipment
- the signal is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the GP ends, and the signal is The second interval duration between the start time and the start time of the GP is less than or equal to the set time interval.
- the embodiment of the present invention further provides a user equipment, which corresponds to the data transmission method shown in FIG. 3.
- the user equipment includes:
- the uplink signal determining module 51 is configured to determine an uplink signal that needs to be sent to the network device;
- the uplink signal sending module 52 is configured to send the uplink signal in the GP between the downlink subframe and the uplink subframe or after the GP ends.
- an interval between a start time of the uplink signal and an end time of the signal sent by the network device in the GP is greater than or equal to a set guard time duration.
- the user equipment further includes:
- a CCA detection module configured to perform CCA detection on a time slot for channel detection in the GP
- the uplink signal sending module is specifically configured to: if the CCA detecting module detects that the current channel is in an idle state, use the current channel to send the uplink signal.
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- the following corresponds to the preferred hardware structure, and corresponds to the data transmission method shown in FIG. 1 provided by the embodiment of the present invention.
- the structure and processing method of the communication device will be described.
- the communication device includes a transceiver 61, and at least one processor 62 coupled to the transceiver 61, wherein:
- the processor 62 is configured to read the program in the memory 63 and perform the following process:
- the trigger transceiver 61 transmits a signal in the GP between the downlink subframe and the uplink subframe to occupy the current channel; and performs data transmission through the current channel.
- the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 62 and various circuits of memory represented by memory 63.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
- the bus interface provides an interface.
- Transceiver 61 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
- the processor 62 is responsible for managing the bus architecture and general processing, and the memory 63 can store data used by the processor 62 when performing operations.
- the signal includes a placeholder signal for indicating that the current channel is occupied.
- the signal further includes: a downlink signal sent by the network device to the user equipment;
- the signal further includes: an uplink signal sent by the user equipment to the network device.
- the communication device is a network device
- a start time of the signal is a start time of the GP
- a first interval duration between an end time of the signal and an end time of the GP is less than or It is equal to the set time interval, and the first interval duration is greater than or equal to the minimum guard duration.
- a sum of a second interval duration and a first interval duration is less than or equal to a set time interval, and the first interval duration is greater than or equal to a minimum guard duration;
- the communication device is a user equipment, and the sum of the second interval duration and the first interval duration is less than or equal to the set time interval, and the second interval duration is greater than or equal to the minimum guard duration;
- the first interval duration is an interval duration between an end time of the signal and an end time of the GP
- the second interval duration is a start time of the signal and a start time of the GP. The interval between the lengths.
- the communication device is a user equipment, and a second interval duration between a start time of the signal and a start time of the GP is less than or equal to a set time interval, and the second interval duration is Greater than or equal to the minimum protection duration.
- the communication device is a user equipment
- the processor 62 further performs: for channel detection in the GP.
- the current channel is subjected to CCA detection on the time slot; if it is detected that the current channel is in an idle state, the trigger transceiver 61 transmits the signal in the GP.
- the communication device is a user equipment
- the signal is an uplink signal that the user equipment needs to send to the network device in an uplink subframe after the GP ends, and the signal is The second interval duration between the start time and the start time of the GP is less than or equal to the set time interval.
- the user equipment includes a transceiver 71, and at least one processor 72 coupled to the transceiver 71, wherein:
- the processor 72 is configured to read a program in the memory 73 and perform the following process:
- the triggering transceiver 71 Determining an uplink signal that needs to be sent to the network device; the triggering transceiver 71 transmits the uplink signal in the GP between the downlink subframe and the uplink subframe or after the GP ends.
- the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 72 and various circuits of memory represented by memory 73.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
- the bus interface provides an interface.
- Transceiver 71 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
- Processor 72 is responsible for managing the bus architecture and general processing, and memory 73 can store data used by processor 72 in performing the operations.
- an interval between a start time of the uplink signal and an end time of the signal sent by the network device in the GP is greater than or equal to a set guard time duration.
- the processor 72 also performs:
- CCA detection is performed on a time slot for channel detection in the GP; if it is detected that the current channel is in an idle state, the trigger transceiver 71 transmits the uplink signal using the current channel.
- the signal sent by the network device includes a placeholder signal for indicating that the current channel is occupied
- the signal sent by the user equipment is used to indicate a occupancy signal occupying the current channel or an uplink signal sent by the user equipment to the network device.
- the signal sent by the network device further includes: a downlink signal sent by the network device to the user equipment.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ one or more computers having computer usable program code embodied therein. The form of a computer program product embodied on a storage medium, including but not limited to disk storage, CD-ROM, optical storage, and the like.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
Description
Claims (26)
- 一种数据传输方法,其特征在于,该方法包括:通信设备在下行子帧与上行子帧之间的转换时长内发送信号,以占用当前信道;所述通信设备通过所述当前信道,进行数据传输。
- 如权利要求1所述的方法,其特征在于,所述信号包括用于表示占用当前信道的占位信号。
- 如权利要求2所述的方法,其特征在于,若所述通信设备为网络设备,所述信号还包括:所述网络设备向用户设备发送的下行信号;若所述通信设备为用户设备,所述信号还包括:所述用户设备向网络设备发送的上行信号。
- 如权利要求1所述的方法,其特征在于,所述通信设备为网络设备,所述信号的起始时刻为所述转换时长的起始时刻,所述信号的结束时刻与所述转换时长的结束时刻之间的第一间隔时长小于或等于设定的时间间隔,且所述第一间隔时长大于或等于最小保护时长。
- 如权利要求1所述的方法,其特征在于,若所述通信设备为网络设备,第二间隔时长与第一间隔时长之和小于或等于设定的时间间隔,且所述第一间隔时长大于或等于最小保护时长;若所述通信设备为用户设备,第二间隔时长与第一间隔时长之和小于或等于设定的时间间隔,且所述第二间隔时长大于或等于最小保护时长;其中,所述第一间隔时长为所述信号的结束时刻与所述转换时长的结束时刻之间的间隔时长,所述第二间隔时长为所述信号的起始时刻与所述转换时长的起始时刻之间的间隔时长。
- 如权利要求1所述的方法,其特征在于,所述通信设备为用户设备,所述信号的起始时刻与所述转换时长的起始时刻之间的第二间隔时长小于或等于设定的时间间隔,且所述第二间隔时长大于或等于最小保护时长。
- 如权利要求1~3、5~6任一项所述的方法,其特征在于,所述通信设备为用户设备,所述通信设备在所述转换时长内发送所述信号之前,该方法还包括:所述通信设备在所述GP内用于信道检测的时隙上对所述当前信道进行干净信道评估CCA检测;所述通信设备在所述转换时长内发送所述信号,包括:若检测到所述当前信道为空闲态,所述通信设备在所述转换时长内发送所述信号。
- 如权利要求1所述的方法,其特征在于,所述通信设备为用户设备,所述信号为所述用户设备需要在所述转换时长结束后的上行子帧上发送给网络设备的上行信号,所述信号的起始时刻与所述转换时长的起始时刻之间的第二间隔时长小于或等于设定的时间 间隔。
- 一种数据传输方法,其特征在于,该方法包括:用户设备确定需要向网络设备发送的上行信号;所述用户设备在下行子帧与上行子帧之间的转换时长内或所述转换时长结束后,发送所述上行信号。
- 如权利要求9所述的方法,其特征在于,所述上行信号的起始时刻与所述网络设备在所述转换时长内发送的信号的结束时刻的间隔时长大于或等于设定的保护时长。
- 如权利要求9或10所述的方法,其特征在于,所述用户设备发送所述上行信号之前,还包括:所述用户设备在所述转换时长内的用于信道检测的时隙上进行CCA检测;所述用户设备发送所述上行信号,包括:若检测到所述当前信道为空闲态,所述用户设备使用当前信道,发送所述上行信号。
- 如权利要求11所述的方法,其特征在于,所述网络设备发送的信号包括用于表示占用当前信道的占位信号;所述用户设备发送的信号为:用于表示占用当前信道的占位信号、或者所述用户设备向所述网络设备发送的上行信号。
- 如权利要求12所述的方法,其特征在于,所述网络设备发送的信号还包括:所述网络设备向用户设备发送的下行信号。
- 一种通信设备,其特征在于,该通信设备包括:信号发送模块,用于在下行子帧与上行子帧之间的保护间隔转换时长内发送信号,以占用当前信道;数据传输模块,用于通过所述当前信道,进行数据传输。
- 如权利要求14所述的通信设备,其特征在于,所述信号包括用于表示占用当前信道的占位信号。
- 如权利要求15所述的通信设备,其特征在于,若所述通信设备为网络设备,所述信号还包括:所述网络设备向用户设备发送的下行信号;若所述通信设备为用户设备,所述信号还包括:所述用户设备向网络设备发送的上行信号。
- 如权利要求14所述的通信设备,其特征在于,所述通信设备为网络设备,所述信号的起始时刻为所述转换时长的起始时刻,所述信号的结束时刻与所述转换时长的结束时刻之间的第一间隔时长小于或等于设定的时间间隔,且所述第一间隔时长大于或等于最小保护时长。
- 如权利要求14所述的通信设备,其特征在于,若所述通信设备为网络设备,第二间隔时长与第一间隔时长之和小于或等于设定的时间间隔,且所述第一间隔时长大于或 等于最小保护时长;若所述通信设备为用户设备,第二间隔时长与第一间隔时长之和小于或等于设定的时间间隔,且所述第二间隔时长大于或等于最小保护时长;其中,所述第一间隔时长为所述信号的结束时刻与所述转换时长的结束时刻之间的间隔时长,所述第二间隔时长为所述信号的起始时刻与所述转换时长的起始时刻之间的间隔时长。
- 如权利要求14所述的通信设备,其特征在于,所述通信设备为用户设备,所述信号的起始时刻与所述转换时长的起始时刻之间的第二间隔时长小于或等于设定的时间间隔,且所述第二间隔时长大于或等于最小保护时长。
- 如权利要求14~16、18~19任一项所述的通信设备,其特征在于,所述通信设备为用户设备,所述通信设备还包括:CCA检测模块,用于在所述转换时长内用于信道检测的时隙上对所述当前信道进行CCA检测;所述信号发送模块具体用于:若所述CCA检测模块检测到所述当前信道为空闲态,在所述转换时长内发送所述信号。
- 如权利要求14所述的通信设备,其特征在于,所述通信设备为用户设备,所述信号为所述用户设备需要在所述转换时长结束后的上行子帧上发送给网络设备的上行信号,所述信号的起始时刻与所述转换时长的起始时刻之间的第二间隔时长小于或等于设定的时间间隔。
- 一种用户设备,其特征在于,该用户设备包括:上行信号确定模块,用于确定需要向网络设备发送的上行信号;上行信号发送模块,用于在下行子帧与上行子帧之间的转换时长内或所述转换时长结束后,发送所述上行信号。
- 如权利要求22所述的用户设备,其特征在于,所述上行信号的起始时刻与所述网络设备在所述转换时长内发送的信号的结束时刻的间隔时长大于或等于设定的保护时长。
- 如权利要求22或23所述的用户设备,其特征在于,所述用户设备还包括:CCA检测模块,用于在所述转换时长内的用于信道检测的时隙上进行CCA检测;所述上行信号发送模块具体用于:若所述CCA检测模块检测到所述当前信道为空闲态,使用当前信道,发送所述上行信号。
- 如权利要求24所述的用户设备,其特征在于,所述网络设备发送的信号包括用于表示占用当前信道的占位信号;所述用户设备发送的信号为:用于表示占用当前信道的占位信号、或者所述用户设备向所述网络设备发送的上行信号。
- 如权利要求25所述的用户设备,其特征在于,所述网络设备发送的信号还包括:所述网络设备向用户设备发送的下行信号。
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JP6854287B2 (ja) | 2021-04-07 |
KR102104283B1 (ko) | 2020-04-24 |
CN106413118B (zh) | 2020-01-17 |
JP2018525953A (ja) | 2018-09-06 |
KR20180034639A (ko) | 2018-04-04 |
US20180220464A1 (en) | 2018-08-02 |
EP3331309B1 (en) | 2020-06-17 |
CN106413118A (zh) | 2017-02-15 |
EP3331309A4 (en) | 2018-07-11 |
US10820350B2 (en) | 2020-10-27 |
EP3331309A1 (en) | 2018-06-06 |
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