WO2016101284A1

WO2016101284A1 - Method and device for using unlicensed frequency spectrum

Info

Publication number: WO2016101284A1
Application number: PCT/CN2014/095224
Authority: WO
Inventors: 严平; 宁洪; 康宏昊
Original assignee: 华为技术有限公司
Priority date: 2014-12-27
Filing date: 2014-12-27
Publication date: 2016-06-30
Also published as: CN106063347A; CN106063347B

Abstract

A method and device for using an unlicensed frequency spectrum are provided in the present invention. An access network device receives scheduling request information transmitted by User Equipment (UE); the access network device detects whether the unlicensed frequency spectrum is idle; the access network device begins to occupy the unlicensed frequency spectrum when detecting that the unlicensed frequency spectrum is idle; the access network device transmits an uplink scheduling signaling to the UE; the access network device stops occupying the unlicensed frequency spectrum after a preset period of time from the beginning of the uplink scheduling signaling transmission; and the access network device receives data packages transmitted by the UE in the unlicensed frequency spectrum. With an embodiment of the present invention, by the occupation of the unlicensed frequency spectrum in advance, a probability of the UE getting disturbed during an uplink transmission is effectively reduced, and the problems of errors, interruptions or delays and so forth of UE data transmission are solved.

Description

Method and apparatus for using unlicensed spectrum

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for using an unlicensed spectrum.

Background technique

The wireless spectrum can be divided into licensed spectrum and unlicensed spectrum. The frequency band corresponding to the licensed spectrum is the frequency band used by the regulatory agency to be awarded to a specific wireless carrier through auction; the frequency band corresponding to the unlicensed spectrum is a frequency band that can be used freely by any wireless carrier. In recent years, due to the surge in data traffic of wireless services and the limited resources of licensed spectrum, more and more wireless operators are turning their attention to resource-rich unlicensed spectrum, hoping to offload wireless service data traffic by using unlicensed spectrum. .

User equipment (UE, user equipment) is susceptible to interference from other wireless devices during the uplink transmission using unlicensed spectrum, resulting in data transmission errors, interruptions, or delays.

Summary of the invention

In view of this, the embodiments of the present invention provide a method and device for using an unlicensed spectrum to improve the success rate of transmitting uplink data by the UE on an unlicensed spectrum.

A first aspect provides a method for using an unlicensed spectrum, where: an access network device receives scheduling request information sent by a user equipment UE, where the scheduling request information is used to request channel resources for uplink transmission; The device detects whether the unlicensed spectrum is idle; the access network device starts to occupy the unlicensed spectrum when detecting that the unlicensed spectrum is idle; and the access network device sends uplink scheduling signaling to the UE, where The uplink scheduling signaling is used to indicate the channel resource of the uplink transmission, where the channel resource of the uplink transmission is located on the unlicensed spectrum; and the access network device passes a predetermined time after starting to send the uplink scheduling signaling. Stopping the unlicensed spectrum; the access network device receives a data packet sent by the UE on the unlicensed spectrum, and the data packet is after the UE starts receiving the uplink scheduling signaling. Sent when the predetermined time elapses.

According to the technical solution provided by the embodiment of the present invention, the access network device receives the scheduling request message sent by the UE. After the uplink scheduling signaling is sent to the UE, when the UE has not performed uplink transmission, the unlicensed spectrum is occupied, and other access network devices or other types are avoided. The wireless device uses the unlicensed spectrum to transmit data before the uplink transmission of the UE, thereby effectively reducing the probability that the UE is interfered in the uplink transmission, and solving the problem of the UE data transmission error, interruption or delay.

In conjunction with the first aspect, in a first implementation manner of the first aspect, the occupying the unlicensed spectrum includes: the access network device transmitting data on the unlicensed spectrum.

With reference to the first aspect and the foregoing implementation manner, in the second implementation manner of the first aspect, the data is any one of a padding sequence and a pseudo-random sequence.

The pseudo-random sequence can reduce the peak-to-average power ratio of the signal, that is, improve the power amplifier efficiency of the transmitter of the access network device.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the that the access network device sends uplink scheduling signaling to the UE includes: the access network device starts to occupy the The uplink scheduling signaling is sent to the UE while the spectrum is unlicensed.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the access network device sends the uplink scheduling signaling to the UE, where the access network device is occupying the non- When the licensed spectrum passes the time interval, the uplink scheduling signaling is sent to the UE.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, in the frequency division duplex long term evolution system, the predetermined time is 4 transmission time intervals TTI.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, the scheduling request information and the uplink scheduling signaling are transmitted on a licensed spectrum.

The scheduling request information and the uplink scheduling signaling are transmitted on the licensed spectrum to ensure the reliability of the control signaling transmission.

With reference to the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, the uplink scheduling signaling is a first uplink scheduling signaling, where the data packet is a first data packet, the predetermined time a first predetermined time, the first data packet includes an amount of data to be transmitted in the uplink transmission buffer area of the UE, the method further includes: when the access network device finishes receiving the first data packet , The access network device starts to occupy the unlicensed spectrum; the access network device sends second uplink scheduling signaling to the UE according to the amount of data to be transmitted, and the second uplink scheduling signaling a channel resource for transmitting data to be transmitted in the uplink transmission buffer area of the UE, where the channel resource for transmitting data to be transmitted in the uplink transmission buffer area of the UE is located on the unlicensed spectrum; The network device stops occupying the unlicensed spectrum when a second predetermined time elapses after the sending of the second uplink scheduling signaling, and the access network device receives the second that is sent by the UE on the unlicensed spectrum. a data packet, where the second data packet is sent by the UE after the second predetermined time elapses after starting to receive the second uplink scheduling signaling.

The technical solution provided by the embodiment of the present invention shows an uplink transmission scheduling algorithm. When the access network device receives the uplink scheduling signaling, and the UE does not transmit uplink information on the unlicensed spectrum, the access network device takes the initiative. Preempting the unlicensed spectrum, preventing other access network devices or other types of wireless devices from using the unlicensed spectrum to transmit data because the unlicensed spectrum is not detected, thereby effectively reducing the UE during the execution of the algorithm. The probability of interference during uplink transmission avoids problems such as UE data transmission errors, interruptions or delays, and increases the accuracy and efficiency of data transmission on unlicensed spectrum.

With reference to the first aspect and the foregoing implementation manner, in the eighth implementation manner of the first aspect, the second uplink scheduling signaling is transmitted on the licensed spectrum.

In conjunction with the first aspect and the foregoing implementation manner, in the ninth implementation manner of the first aspect, the pseudo random sequence is an M sequence or a Golden sequence.

With reference to the first aspect and the foregoing implementation manner, in the tenth implementation manner of the first aspect, in the long-term evolution system using frequency division duplex, the second predetermined time is 4 transmission time intervals 4TTI, After the access network device finishes receiving the first data packet, the time for starting to occupy the unlicensed spectrum to the stop occupying the unlicensed spectrum is that the access network device finish receiving the first data. The time t2 elapsed from the time of the packet to the transmission of the second uplink scheduling signaling is added to the second predetermined time 4TTI, that is, 4TTI+t2.

A second aspect provides an access network device, including: a receiving unit, configured to receive scheduling request information sent by a user equipment UE, where the scheduling request information is used to request channel resources for uplink transmission; a processing unit, configured to detect whether the unlicensed spectrum is idle; the processing unit is further configured to start occupying the unlicensed spectrum when detecting that the unlicensed spectrum is idle; and sending, for detecting the non- When the licensed spectrum is idle, the uplink scheduling signaling is sent to the UE, and the uplink scheduling signaling is used to indicate the channel resource of the uplink transmission, where the channel resource of the uplink transmission is located on the unlicensed spectrum; The processing unit is further configured to stop occupying the unlicensed spectrum when the signaling unit starts transmitting the uplink scheduling, and the receiving unit is further configured to receive the UE in the unlicensed spectrum. And a data packet sent on, where the data packet is sent when the UE passes the predetermined time after starting to receive the uplink scheduling signaling.

The access network device provided by the embodiment of the present invention actively preempts the unlicensed spectrum when the UE receives the uplink scheduling signaling, and the UE does not send the uplink service data in the unlicensed spectrum, thereby avoiding other access network devices. Or other types of wireless devices use the unlicensed spectrum to transmit data because the unlicensed spectrum is not occupied, thereby effectively reducing the probability of the UE being interfered in uplink transmission, and avoiding UE data transmission errors, interruptions, delays, and the like. The problem is increased accuracy and efficiency in transmitting data over unlicensed spectrum.

With reference to the second aspect, in a first implementation manner of the second aspect, the processing unit occupies the unlicensed spectrum includes: the processing unit triggers the sending unit to send data on the unlicensed spectrum.

With reference to the second aspect and the foregoing implementation manner, in the second implementation manner of the second aspect, the data is any one of a padding sequence and a pseudo-random sequence.

With reference to the second aspect and the foregoing implementation manner, in a third implementation manner of the second aspect, the sending, by the sending unit, the uplink scheduling signaling to the UE includes: the processing unit occupies the unlicensed spectrum The sending unit sends the uplink scheduling signaling to the UE.

With reference to the second aspect and the foregoing implementation manner, in a fourth implementation manner of the second aspect, the sending, by the sending unit, the uplink scheduling signaling to the UE includes: the processing unit occupies the unlicensed spectrum elapsed time During the interval, the sending unit sends the uplink scheduling signaling to the UE.

With reference to the second aspect and the foregoing implementation manner, in a fifth implementation manner of the second aspect, in the long term evolution system using frequency division duplexing, the predetermined time is 4 transmission time intervals TTI.

With reference to the second aspect and the foregoing implementation manner, in a sixth implementation manner of the second aspect, the scheduling request information received by the receiving unit and the uplink scheduling signaling sent by the sending unit are on an authorized spectrum. transmission.

With reference to the second aspect and the foregoing implementation manner, in a seventh implementation manner of the second aspect, the uplink scheduling signaling is a first uplink scheduling signaling, where the data packet is a first data packet, the predetermined time Is the first predetermined time, the first data packet received by the receiving unit includes an amount of data that needs to be transmitted in the uplink transmission buffer area of the UE; and the processing unit is further configured to: when the receiving unit finish receiving the The first data packet begins to occupy the unlicensed spectrum; the sending unit is further configured to send the second uplink scheduling signaling to the UE according to the quantity of the data to be transmitted, where the second uplink scheduling signal is And a channel resource for indicating data to be transmitted in the uplink transmission buffer, where the channel resource for transmitting data to be transmitted in the uplink transmission buffer of the UE is located on the unlicensed spectrum;

The processing unit is further configured to stop occupying the unlicensed spectrum when a second predetermined time elapses after the start sending unit sends the second uplink scheduling signaling; the receiving unit is further configured to receive the UE a second data packet sent on the unlicensed spectrum, where the second data packet is sent by the UE when the second uplink scheduling signaling is started to receive the second predetermined time.

The foregoing technical solution provided by the embodiment of the present invention provides an uplink transmission scheduling algorithm, where the access network device receives uplink scheduling signaling when the UE does not uplink transmission on the unlicensed spectrum, and the access network device Actively preempting the unlicensed spectrum, preventing other access network devices or other types of wireless devices from using the unlicensed spectrum to transmit data because the unlicensed spectrum is not detected, thereby effectively reducing the UE during the execution of the algorithm. The probability of being interfered in the uplink transmission avoids problems such as UE data transmission errors, interruptions or delays, and increases the accuracy and efficiency of data transmission on the unlicensed spectrum.

With reference to the second aspect and the foregoing implementation manner, in the eighth implementation manner of the second aspect, the second uplink scheduling signaling sent by the sending unit is transmitted on the licensed spectrum.

With reference to the second aspect and the foregoing implementation manner, in a ninth implementation manner of the second aspect, The pseudo-random sequence is an M sequence or a Golden sequence.

With reference to the second aspect and the foregoing implementation manner, in the tenth implementation manner of the second aspect, in the long-term evolution system using the frequency division duplex, the second predetermined time is 4 transmission time intervals 4TTI, After the receiving unit finishes receiving the first data packet, the processing unit starts to occupy the unlicensed spectrum to stop occupying the unlicensed spectrum, when the access network device finishes receiving the first data packet. The time t2 elapsed when the second uplink scheduling signaling is sent is added to the second predetermined time 4TTI, that is, 4TTI+t2.

According to the technical solution provided by the embodiment of the present invention, the access network device receives the scheduling request information sent by the UE, and after detecting that the unlicensed spectrum is available, after the uplink scheduling signaling is sent to the UE, the UE has not performed uplink. During transmission, the unlicensed spectrum is occupied, and other access network devices or other types of wireless devices are prevented from using the unlicensed spectrum to transmit data before the uplink transmission of the UE, thereby effectively reducing the probability of the UE being interfered in uplink transmission. Solved the problem of UE data transmission error, interruption or delay.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings can also be obtained from those skilled in the art based on these drawings without paying any creative effort.

1 is a flowchart of a method for using an unlicensed spectrum according to an embodiment of the present invention;

2 is a flowchart of another method for using an unlicensed spectrum according to an embodiment of the present invention;

3a is an interaction flowchart of a method for using an unlicensed spectrum in an FDD-LTE system according to an embodiment of the present invention;

FIG. 3b is a time domain flowchart of a method for using an unlicensed spectrum in an FDD-LTE system according to an embodiment of the present invention; FIG.

4 is a schematic structural diagram of an apparatus for using an unlicensed spectrum according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another device using an unlicensed spectrum according to an embodiment of the present invention.

detailed description

In order to make the technical solutions of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the following embodiments are part of the present invention and not all of them. example.

The technical solution provided by the embodiment of the present invention can be applied to various wireless communication networks, such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), and orthogonal frequency division multiple access. (Orthogonal frequency-division multiple access, OFDMA), single carrier frequency division multiple access (SC-FDMA) and other networks. The terms "network" and "system" can be replaced with each other. A CDMA network may implement wireless technologies such as universal terrestrial radio access (UTRA), CDMA2000, and the like. UTRA can include variants of CDMA (WCDMA) and other CDMA. CDMA2000 can cover the Interim Standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. An OFDMA network may implement wireless technologies such as evolved universal radio access (E-UTRA), ultra mobile broadband (UMB), and Flash OFDMA. UTRA and E-UTRA are UMTS and UMTS evolved versions. 3GPP is a new version of UMTS that uses E-UTRA in long term evolution (LTE) and LTE Advanced (LTE-A). UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in the documentation of the 3GPP standards organization. CDMA2000 and UMB are described in the documentation of the 3GPP2 standards organization. The technology described in the embodiments of the present invention can also be applied to the wireless network and the wireless technology described above.

In the existing uplink data scheduling scheme, there is a certain transmission interval between the UE receiving the uplink scheduling signaling and actually starting the uplink transmission data. If the access network device or other type of wireless device in other communication systems, If the wireless access point (AP) in the walkie-talkie and wireless-fidelity (Wi-Fi) technology detects the unlicensed spectrum idle during this transmission interval, the unlicensed spectrum is used. When the data is transmitted, the UE may be seriously interfered with the uplink transmission of the unlicensed spectrum, causing problems such as uplink data transmission errors, interruptions, or delays.

The communication system provided by the embodiment of the present invention includes an access network device and a user equipment UE, and the access network device and the UE may be used to implement the method provided by the embodiment of the present invention. The access network device may provide communication coverage of a specific physical area, and is used to connect the UE to the network and perform communication. The access network device may be a base station or the like, and may be a macro base station or a small base station. For example, in an LTE system, the access network device may be an eNodeB, or may be a small base station such as a home eNodeB (HeNB, home eNodeB), an AP, a micro base station, or a pico base station. . In the UMTS system, the access network device may include a Node B and a Radio Network Controller (RNC). In the GSM system, the access network device may include a base station controller (BSC), a base transceiver station (BTS), and the like. The UEs may be distributed throughout the wireless network, and each UE may be static or mobile. A UE may be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like. The UE can be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld, a laptop computer, a cordless phone (cordless) Phone), wireless local loop (WLL) station, etc.

The access network device may use the licensed spectrum to establish a synchronization relationship with the UE before the transmission, or may use the authorized spectrum to send or receive control signaling, for example, by using a physical uplink control channel (PUCCH). The spectrum receives the scheduling request indication (SRI) sent by the UE, and sends downlink control information (DCI, downlink control information) to the UE through the physical downlink control channel (PDCCH). . The access network device may schedule the UE to transmit data on the licensed spectrum. When the licensed spectrum resource is insufficient, the UE may also be scheduled to transmit data on the unlicensed spectrum. The embodiment of the present invention is a case where an access network device schedules a UE to transmit data on an unlicensed spectrum.

FIG. 1 is a schematic flowchart of a method for using an unlicensed spectrum according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:

S101. The access network device receives scheduling request information sent by the UE, where the scheduling request information is used to request channel resources for uplink transmission.

If the UE has new data to transmit, the UE may send scheduling request information to the access network device. Optionally, the UE may send scheduling request information to the access network device by using a PUCCH. The scheduling request information may be an SRI, and the access network device is notified that the UE has data to be transmitted, and allocates channel resources for the uplink transmission request.

S102. The access network device detects whether an unlicensed spectrum is idle.

When the access network device receives the scheduling request information sent by the UE, it detects whether the unlicensed spectrum is idle. For example, the access network device may perform carrier sensing (CS) on the unlicensed spectrum to detect whether the unlicensed spectrum is idle.

S103. The access network device starts to occupy the unlicensed spectrum when detecting that the unlicensed spectrum is idle.

The access network device occupies the idle unlicensed spectrum, so that other access network devices cannot use the unlicensed spectrum, including other radio access technology (RAT) systems or other carrier systems. The unlicensed spectrum cannot be used by the access network devices in the medium.

The access network device may send data on the unlicensed spectrum to implement occupation of the unlicensed spectrum, that is, when the access network device detects that the unlicensed spectrum is idle, the access network device starts. Transmitting data on the unlicensed spectrum.

Alternatively, the data can be a padding sequence. The padding sequence may be all 0s or all 1 sequences, and does not represent any meaning but enables other access network devices or other types of wireless communication devices to consider the segment of the unlicensed spectrum to be non-idle. Alternatively, the data may also be a pseudo-random sequence, and the pseudo-random sequence may be used to reduce the peak-to-average power ratio (PAPR) of the signal, that is, the power amplifier efficiency of the transmitter of the access network device is improved. For example, the pseudo-random sequence can be an M sequence or a Golden sequence.

In the embodiment of the present invention, when the access network device detects that the unlicensed spectrum is idle, the access network device starts to occupy the unlicensed spectrum, and the access network device may detect the location. Description When the unlicensed spectrum is idle, the access network device starts to occupy the unlicensed spectrum at the same time. In actual situations, there may also be a time interval between detecting idleness and starting occupancy, such as time for the access network device to perform calculations, transmission instructions, etc., but the interval is very short, such as 10 μs, 20 μs, etc. due to the time interval. Very short-lived, so that other wireless access devices can't take up the unlicensed spectrum, so the time interval of existence can be negligible. That is, in the embodiment of the present invention, when the access network device detects that the unlicensed spectrum is idle, the access network device starts to occupy the unlicensed spectrum, and the access network device is also included. When it is detected that the unlicensed spectrum is idle, the situation of occupying the unlicensed spectrum begins to be started in a very short time and close to the same time. The embodiments of the present invention are further described as a supplement and not a limitation.

S104. The access network device sends uplink scheduling signaling to the UE, where the uplink scheduling signaling is used to indicate a channel resource of the uplink transmission, where the channel resource of the uplink transmission is located on the unlicensed spectrum.

The uplink scheduling signaling may include specific frequency point information, a modulation and coding manner, and the like of the uplink transmission of the UE. The content of the uplink scheduling signaling may be an uplink grant (UL grant), and the format of the uplink scheduling signaling is DCI format 0 (DCI format 0).

The uplink scheduling signaling may be sent on the licensed spectrum, and when sent on the licensed spectrum, the reliability of the uplink scheduling signaling transmission may be increased. Alternatively, the uplink scheduling signaling may also be sent on an unlicensed spectrum.

The access network device may send the uplink scheduling signaling when the unlicensed spectrum starts to be occupied, that is, the access network device sends the uplink scheduling signal while starting to occupy the unlicensed spectrum. Let the UE.

The access network device may also send the uplink scheduling signaling to the UE after a period of time after occupying the unlicensed spectrum. For example, when there are a large number of UEs in the access network device that need to be scheduled, the UE may not be scheduled to transmit data when the spectrum is occupied, but the other UEs are first scheduled to transmit data, and the scheduling device is dispatched after the time period elapses. If the UE transmits data, or the priority of the UE requesting scheduling is lower than that of other UEs, the other UEs may be preferentially scheduled, and then, after the time period is elapsed, the UE is scheduled again, and the normal guarantee office may be used. The situation of the UE's business Under the overall improvement of the efficiency of the system. When the time period is very short, that is, in the case of being close to 0, it is equivalent to the access network device transmitting the uplink scheduling signaling to the UE while starting to occupy the unlicensed spectrum.

S105. The access network device stops occupying the unlicensed spectrum when a predetermined time elapses after starting to send the uplink scheduling signaling.

The predetermined time may be a time elapsed after the UE starts to receive the uplink scheduling signaling to the actual transmission, and may have different specifications in different communication protocols, or may be between the access network device and the UE. Negotiate and determine. For example, in an LTE system using frequency division duplexing (FDD), there may be four transmission time intervals (TTIs), where 1 TTI may be 1 ms. Based on this, in the scenario that the access network device starts to occupy the unlicensed spectrum, the first uplink scheduling signaling is sent to the UE, and the access network device starts to occupy the unlicensed spectrum to stop occupying the unlicensed spectrum. The time is 4TTI; or, in the scenario that the access network device starts to occupy the unlicensed spectrum and sends the uplink scheduling signaling after a period of time, if the time period is t1, the access network device starts to occupy The elapsed time from the unlicensed spectrum to the stop of occupying the unlicensed spectrum is 4TTI+t1. It should be noted that there should be no delay or delay in the transmission and reception of the uplink scheduling signaling, so that the access network device can start transmitting the uplink scheduling signaling at a predetermined time and the UE. The time point at which the reception of the uplink scheduling signaling starts to pass the predetermined time is consistent.

S106. The access network device receives a data packet sent by the UE on the unlicensed spectrum, where the data packet is sent when the UE passes the predetermined time after starting to receive the uplink scheduling signaling.

When the access network device stops occupying the unlicensed spectrum, it starts to receive the data packet sent by the UE. It should be noted that, in actual situations, the conversion of the RF channel from the uplink transmission state to the uplink reception state in the access network device requires a certain transmission and reception state transition time. Therefore, in actual operation, the time for occupying the unlicensed spectrum may be slightly shorter. The foregoing time, for example, the time when the occupation is stopped, is preset in advance, and the preset time may be determined according to the performance of the radio frequency device of the access network device, for example, 10 μs, 20 μs, or 30 μs. Since the transceiving state transition time is very short, it can be ignored. meter. Therefore, in the description of the embodiment of the present invention, the transceiver status transition time may not be counted in the time when the access network device occupies the unlicensed spectrum, or if the transceiver status transition time is separately counted And the sum of the transmission and reception switching time and the occupied time of the unlicensed spectrum is equal to the length of time between the UE starting to receive the uplink scheduling signaling and sending the data packet.

According to the technical solution provided by the embodiment of the present invention, the access network device receives the scheduling request information sent by the UE, and after detecting that the unlicensed spectrum is available, after the uplink scheduling signaling is sent to the UE, the UE has not performed uplink. During transmission, the unlicensed spectrum is occupied, and other access network devices or other types of wireless devices are prevented from using the unlicensed spectrum to transmit data before the uplink transmission of the UE, thereby effectively reducing the probability of the UE being interfered in uplink transmission. The problem of UE data transmission error, interruption or delay is avoided, and the accuracy and efficiency of transmitting data on the unlicensed spectrum are increased.

FIG. 2 is a schematic flowchart diagram of another method for using an unlicensed spectrum according to an embodiment of the present invention. As shown in FIG. 2, the method includes the steps in FIG. 1, and S101-S106 may refer to the description of steps S101-S106 in the method embodiment shown in FIG. 1.

In this embodiment, the uplink scheduling signaling in S104-S106 is first uplink scheduling signaling, the data packet is a first data packet, the predetermined time is a first predetermined time, and the S106 is The data packet includes the amount of data to be transmitted in the uplink transmission buffer area of the UE. For example, in an LTE system, the amount of data can be carried in a buffer status report (BSR). The method also includes:

S207. When the access network device finishes receiving the first data packet, the access network device starts to occupy the unlicensed spectrum.

The access network device can transmit data on the unlicensed spectrum to achieve reoccupation of the unlicensed spectrum. Alternatively, the data can be a padding sequence. The padding sequence may be all 0s or all 1 sequences, and does not represent any meaning but enables other access network devices or other types of wireless communication devices to consider the segment of the unlicensed spectrum to be non-idle. Alternatively, the data may also be a pseudo-random sequence, and the pseudo-random sequence may be used to reduce the PAPR of the signal, that is, to improve the power amplifier efficiency of the transmitter of the access network device. For example, the pseudo-random sequence can be an M sequence or a Golden sequence.

In the embodiment of the present invention, when the access network device finishes receiving the first data packet, the connection The network access device starts to occupy the unlicensed spectrum, and the access network device starts to receive the first data packet and starts to occupy the unlicensed spectrum again. In the actual case, there may also be a time interval between receiving the first data packet and starting to occupy the unlicensed spectrum again, but the time interval is very short, such as 10 μs, 20 μs, etc., because the time interval is very short, so that the other The wireless access device does not have time to occupy the unlicensed spectrum, so the time interval of existence can be negligible.

S208. The access network device sends, according to the quantity of the data to be transmitted, the second uplink scheduling signaling to the UE, where the second uplink scheduling signaling is used to indicate that the uplink transmission buffer area of the UE is transmitted. A channel resource of data to be transmitted, where the channel resource for transmitting data to be transmitted in the uplink transmission buffer area of the UE is located on the unlicensed spectrum.

After receiving the first data packet, the access network device parses the first data packet to obtain the amount of data to be transmitted in the uplink transmission buffer area of the UE. The access network device may determine a channel resource size allocated to the UE for uplink transmission according to the amount of data to be transmitted in the uplink transmission buffer area of the UE.

The second uplink scheduling signaling may include specific frequency point information, a modulation and coding manner, and the like of the uplink transmission of the UE. The format of the second uplink scheduling signaling may be DCI format 0.

The time point at which the access network device starts to send the second uplink scheduling signaling may be after the time t3 after the start of occupying the unlicensed spectrum to determine the channel resource allocated to the uplink transmission of the UE, or may begin to occupy the unlicensed spectrum. T3, after a waiting time t4, where t4 ≥ 0. That is, the time t2=t3+t4 elapsed when the access network device completes receiving the first data packet and starts transmitting the second uplink scheduling signaling.

S209. The access network device stops occupying the unlicensed spectrum when a second predetermined time passes after starting to send the second uplink scheduling signaling.

The second predetermined time may be a time elapsed when the UE starts to receive the second uplink scheduling signaling to the actual line transmission, may have different specifications in different communication protocols, or may be used by the access network device and the The UE determines the negotiation between the UEs. For example, there may be 4 TTIs in the FDD-LTE system. In combination with the above steps, the access network device starts to occupy the unlicensed spectrum again and stops occupying again. The elapsed time of the unlicensed spectrum may be t2+4TTI.

S210. The access network device receives a second data packet that is sent by the UE on the unlicensed spectrum, where the second data packet is that the UE passes after receiving the second uplink scheduling signaling. Sent when the second predetermined time is stated.

In this embodiment, the access network device may start receiving the second data packet sent by the UE when the occupation of the unlicensed spectrum is stopped. It should be noted that, in actual situations, the conversion of the RF channel from the uplink transmission state to the uplink reception state in the access network device requires a certain transmission and reception state transition time. Therefore, in actual operation, the time for occupying the unlicensed spectrum may be slightly shorter. The foregoing time, such as the time point of stopping the occupation, is preset in advance, and the preset time may be determined according to the performance of the radio frequency device of the access network device, for example, 10 μs, 20 μs, or 30 μs. Since the transceiving state transition time is very short, it can be ignored. Therefore, in the description of the embodiment of the present invention, the transceiver status transition time may not be counted in the time when the access network device occupies the unlicensed spectrum, or if the transceiver status transition time is separately counted The sum of the transmission and reception switching time and the occupied time of the unlicensed spectrum is equal to the length of time between the start of receiving the second uplink scheduling signaling by the UE and sending the second data packet.

FIG. 3a is a schematic flowchart of a method for using an unlicensed spectrum in an LTE system using frequency division duplexing according to an embodiment of the present invention. As shown in Figure 3a, the method includes:

S301. The UE sends an SRI to the eNodeB on the uplink authorized spectrum.

After establishing synchronization with the eNodeB, the UE maintains an uplink synchronization state, and obtains an SRI subframe position and a transmission period configured by the eNodeB. If new data needs to be transmitted, the UE may perform the PUCCH. The SRI is transmitted on the right spectrum, and the eNodeB can obtain the SRI sent by the UE on the uplink licensed spectrum through the PUCCH.

S302. The eNodeB detects whether the uplink unlicensed spectrum is idle.

Optionally, the detecting method may be performing carrier sensing on the unlicensed spectrum.

If it is detected that the licensed spectrum is occupied, S303 is performed; if the unlicensed spectrum is detected to be idle, S305 is performed.

S303. The eNodeB determines whether the waiting time accumulated from the reception of the SRI transmitted by the UE exceeds the time T'.

If the accumulated waiting time exceeds the time T', then S304 is executed; if the accumulated waiting time does not exceed the time T', then S302 is executed after the waiting time T.

Wherein times T' and T can be preset and T' is greater than T.

S304. The eNodeB schedules the UE to perform uplink transmission on the licensed spectrum.

Since T' may be a relatively long time, according to the optimized scheduling algorithm, if the UE waits for too long, the eNodeB may preferentially schedule the UE to transmit data on the licensed spectrum.

After the transfer is completed, the execution of this process is stopped.

S305: The eNodeB immediately starts to occupy the unlicensed spectrum, and simultaneously sends the DCI to the UE on the downlink authorized spectrum, and the occupied time is 4TTI.

The eNodeB occupies the unlicensed spectrum after 4TTI, and performs step S306;

S306, the UE sends the first data packet to the unlicensed spectrum, and the eNodeB receives the first data packet sent by the UE on the unlicensed spectrum, where the first data packet includes a BSR;

S307. When the eNodeB finishes receiving the first data packet, the eNodeB starts to occupy the unlicensed spectrum again.

S308. The eNodeB parses the first data packet to obtain a data quantity of data to be transmitted in the uplink transmission buffer area of the UE included in the BSR.

S309. The eNodeB determines whether the data volume of the data to be transmitted in the uplink transmission buffer area of the UE indicated by the BSR is greater than 0.

If the amount of data to be transmitted in the uplink transmission buffer of the UE indicated by the BSR is greater than 0, perform S310; if the amount of data to be transmitted in the uplink transmission buffer of the UE indicated by the BSR is equal to 0, execute S313;

S310. The eNodeB determines, according to information about the amount of data to be transmitted in the uplink transmission buffer area of the UE, the number N of data packets that the UE needs to transmit.

S311. The eNodeB sequentially sends N DCIs to the UE sequentially on the downlink authorized spectrum according to the number N of data packets determined by S310.

The manner in which the eNodeB sends N DCIs to the UE can be seen in Figure 3b.

S312 is sent from S311 after the first DCI is sent, and S312 is performed;

S312: The eNodeB stops occupying the unlicensed spectrum, and receives the second data packet to the N+1th data packet that the UE sequentially sends on the unlicensed spectrum.

For the manner in which the UE sequentially transmits the second data packet to the N+1th data packet sequentially on the unlicensed spectrum, refer to FIG. 3b.

S313. The eNodeB immediately stops the occupation of the unlicensed spectrum, and ends the process.

In order to make the method of FIG. 3a clearer, FIG. 3b is a time domain flowchart of a method for using an unlicensed spectrum in an FDD-LTE system according to an embodiment of the present invention, which is an operation branch of the eNodeB in FIG. 3a detecting an unlicensed spectrum idle. Corresponding time domain flow chart. Figure 3b shows the behavior of the eNodeB and the UE in the time dimension using the method of unlicensed spectrum, the time period indicating the eNodeB occupies the unlicensed spectrum, and the transmission mode of the eNodeB and UE in S311 and S312 in Figure 3a. Figure 3a can be better understood with reference to Figure 3b, but Figure 3b cannot be considered a limitation to Figure 3a.

The content of FIG. 3b will be briefly described. Referring specifically to FIG. 3a, the eNodeB detects the execution method of the eNodeB and the UE in the branch where the unlicensed spectrum is available. As shown in FIG. 3b, the UE transmits the channel resource of the uplink transmission on the uplink licensed spectrum, and the eNodeB detects that the unlicensed spectrum is idle. The eNodeB occupies the unlicensed spectrum while transmitting the DCI on the downlink licensed spectrum, and the occupied time is 4TTI. The UE sends the first data packet on the unlicensed spectrum, where the BSR is included; the eNodeB receives the first data packet, and starts to occupy the unlicensed spectrum again when the first data packet is received, and the occupation time is 4TTI+ For the definition of t2, t2, refer to the related expression in S207 in Fig. 2. The eNodeB parses the first data packet to obtain the amount of data that the BSR indicates the uplink transmission of the UE, and determines the number of data packets that the UE needs to uplink again according to the amount of data that needs to be uplinked in the uplink transmission buffer area of the BSR. And sequentially transmitting N DCIs to the UE on the downlink authorized spectrum frequency point; the eNodeB receives the second data packet to the N+1th data packet sent by the UE on the unlicensed spectrum.

The embodiment of the present invention further provides an access network device, as shown in FIG. 4, which is an access method according to an embodiment of the present invention. Schematic diagram of the structure of the network device. As shown in FIG. 4, the access network device 400 includes a receiving unit 410, a processing unit 420, and a transmitting unit 430.

The receiving unit 410 is configured to receive scheduling request information sent by the user equipment UE, where the scheduling request information is used to request channel resources for uplink transmission.

After the UE maintains the uplink synchronization state and obtains the SRI subframe position and the transmission period configured by the eNodeB, if the new data needs uplink transmission, the scheduling request information is sent. Optionally, the UE may send scheduling request information to the access network device in the PUCCH. The scheduling request information may be an SRI, and the access network device 400 is notified that the data needs to be transmitted, and the channel resource is allocated for the uplink transmission request.

The processing unit 420 is configured to detect whether the unlicensed spectrum is idle.

For example, processing unit 420 can perform carrier sensing on the unlicensed spectrum to detect if the unlicensed spectrum is idle.

The processing unit 420 is further configured to start occupying the unlicensed spectrum when detecting that the unlicensed spectrum is idle.

The processing unit 420 occupies the idle unlicensed spectrum, so that other access network devices cannot use the unlicensed spectrum, including other RAT systems, or the access network devices in other carrier systems cannot use the unauthorized Spectrum.

The processing unit 420 may be configured to send data on the unlicensed spectrum by using the trigger sending unit 430 to implement occupation of the unlicensed spectrum, that is, when the access network device detects that the unlicensed spectrum is idle, the sending unit 430 begins transmitting data on the unlicensed spectrum.

Alternatively, the data can be a padding sequence. The padding sequence may be all 0s or all 1 sequences, and does not represent any meaning but enables other access network devices or other types of wireless communication devices to consider the segment of the unlicensed spectrum to be non-idle. Alternatively, the data can also be a pseudo-random sequence. The use of a pseudo-random sequence can reduce the PAPR of the signal, that is, improve the power amplifier efficiency of the transmitter of the access network device. For example, the pseudo-random sequence can be an M sequence or a Golden sequence.

In the embodiment of the present invention, the processing unit 420 starts to occupy the unlicensed spectrum when detecting that the unlicensed spectrum is idle, and the processing unit 420 may start to detect that the unlicensed spectrum is idle. Occupy the unlicensed spectrum. In actual situations, there may be a time interval between detecting idle and starting occupancy, but this time interval is very short, such as 10μs, 20μs, etc., because the time interval is very short, so that other wireless access devices can not take up the non- The spectrum is licensed, so this interval can be negligible. In the embodiment of the present invention, when the processing unit 420 detects that the unlicensed spectrum is idle, the situation of starting to occupy the unlicensed spectrum also includes the processing unit 420 detecting that the unlicensed spectrum is idle. A situation in which the unlicensed spectrum is occupied after a very short time and approaching. The embodiments of the present invention are further described as a supplement and not a limitation.

The sending unit 430 is configured to send the uplink scheduling signaling to the UE when the unlicensed spectrum is idle, and the uplink scheduling signaling is used to indicate the channel resource of the uplink transmission, where the uplink transmission is Channel resources are located on the unlicensed spectrum.

The uplink scheduling signaling may include specific frequency point information, a modulation and coding manner, and the like of the uplink transmission of the UE. The content of the uplink scheduling signaling may be a UL Grant, and the format of the uplink scheduling signaling is DCI format 0.

Optionally, when the processing unit 420 starts to occupy the unlicensed spectrum, the sending unit 430 sends the first uplink scheduling signaling, that is, the time point that the processing unit 420 starts to occupy the unlicensed spectrum and the sending unit 430. The time point at which the first scheduling signaling is sent is the same.

Alternatively, the sending unit 430 may also send the first scheduling signaling after waiting for the time interval after the processing unit 420 starts to occupy the unlicensed spectrum. When the time interval is very short, that is, in the case of close to 0, the transmitting unit 430 transmits the uplink scheduling signaling when the processing unit 420 starts to occupy the unlicensed spectrum.

The processing unit 420 is further configured to stop occupying the unlicensed spectrum when the sending unit starts sending the uplink scheduling signaling for a predetermined time.

The predetermined time may be a time elapsed after the UE starts to receive the uplink scheduling signaling to the actual transmission, and may have different specifications in different communication protocols, or may be between the access network device and the UE. Negotiate and determine. For example, there may be 4 TTIs in the FDD-LTE system. Based on this, in the case that the processing unit 420 starts to occupy the unlicensed spectrum, and the sending unit 430 sends the first uplink scheduling signaling to the UE, the processing unit 420 starts to occupy the unlicensed spectrum to stop occupying the non- The elapsed time of the licensed spectrum is 4TTI; in the case that the sending unit 430 sends the uplink scheduling signaling to the UE after the processing unit 430 starts to occupy the unlicensed spectrum and waits for the time interval t1, it is 4TTI+t1. It should be noted that the delay and the delay of the transmission and reception of the uplink scheduling signaling should be negligible, so as to ensure that the access network device sends the uplink scheduling signaling at a predetermined time and receives the UE. The uplink scheduling signaling is consistent at the time point of the predetermined time.

The receiving unit 410 is further configured to receive a data packet sent by the UE on the unlicensed spectrum, where the data packet is sent when the UE passes the predetermined time after starting to receive the uplink scheduling signaling.

It can be considered that when the processing unit 420 stops occupying the unlicensed spectrum, the sending unit 430 starts to receive the data packet sent by the UE. It should be noted that, in actual situations, the transition of the radio frequency channel from the uplink transmission state to the uplink reception state in the access network device 400 requires a certain transceiving state transition time. Therefore, in actual operation, the time for occupying the unlicensed spectrum may be slightly shorter. During the above time, for example, the preset time is determined according to the radio frequency device of the access network device, for example, 10 μs, 20 μs or 30 μs. Since the transceiving state transition time is very short, it can be ignored. Therefore, in the description of the embodiment of the present invention, the transceiving state transition time may not be included in the time when the unlicensed spectrum is occupied, or the transceiver transceiving is performed if the transceiving state transition time is separately counted. The sum of the time and the occupied time of the unlicensed spectrum is equal to the length of time between the start of receiving the uplink scheduling signaling by the UE and transmitting the data packet.

Optionally, in the embodiment of the present invention, the foregoing uplink scheduling signaling is a first uplink scheduling signaling, where the data packet is a first data packet, the predetermined time is a first predetermined time, and the first data packet may include The amount of data that needs to be transmitted in the uplink transmission buffer of the UE. For example, in an LTE system, the amount of the data may be carried in the BSR. At this time, the processing unit 420 is further configured to start occupying the unlicensed spectrum when the receiving unit finishes receiving the first data packet.

The processing unit 420 may be configured to trigger the transmission unit 430 to resend data on the unlicensed spectrum to implement occupation of the unlicensed spectrum.

In the embodiment of the present invention, when the receiving unit 410 completes receiving the first data packet, the processing unit 420 starts to occupy the unlicensed spectrum, and the receiving unit 410 may complete receiving the first data packet. At the same time, the processing unit 420 begins to occupy the unlicensed spectrum. In the actual situation, there may also be a time interval between receiving the first data packet and starting to occupy the unlicensed spectrum, but the time interval is very short, such as 10 μs, 20 μs, etc., because the time interval is very short, so that other wireless The access device does not have time to occupy the unlicensed spectrum, so the time interval of existence can be negligible.

After receiving the first data packet, the processing unit 420 parses the first data packet to obtain an amount of data that needs to be transmitted in the uplink transmission buffer area of the UE. The access network device may determine a channel resource size allocated to the UE for uplink transmission according to an amount of data that needs to be uplinked in the uplink transmission buffer area of the UE.

The sending unit 430 is further configured to send the second uplink scheduling signaling to the UE, where the uplink scheduling signaling is used to indicate the channel resource of the uplink transmission, where the channel resource of the uplink transmission is located on the unlicensed spectrum.

The time point at which the sending unit 430 starts to send the second uplink scheduling signaling may be after the processing unit 420 starts to occupy the time t3 that is determined to be allocated to the channel resource allocated by the UE for uplink transmission; or the processing unit 420 may start. After occupying the unlicensed spectrum again, it passes t3 and then waits for a waiting time t4, where t4≥0. That is, the time elapsed when the receiving unit 410 completes receiving the first data packet and when the sending unit 430 starts transmitting the second uplink scheduling signaling is t2=t3+t4.

The processing unit 420 is further configured to stop occupying the unlicensed spectrum when the second predetermined time elapses after the sending unit 430 sends the second uplink scheduling signaling.

The second predetermined time may be after the UE starts to receive the uplink scheduling signaling and then transmits the data to the actual line. The elapsed time may have different specifications in different communication protocols, or may be determined by negotiation between the access network device and the UE. For example, there may be 4 TTIs in the FDD-LTE system. In combination with the above steps, the time elapsed by the processing unit 420 to start occupying the unlicensed spectrum again to stop occupying the unlicensed spectrum may be t2+4TTI.

The receiving unit 410 is further configured to receive a second data packet sent on the unlicensed spectrum, where the second data packet is sent when the UE passes the second predetermined time after starting to receive the second uplink scheduling signaling. .

In this embodiment, when the processing unit 420 stops occupying the unlicensed spectrum, the receiving unit 410 may start to receive the second data packet sent by the UE. It should be noted that, in actual situations, the conversion of the radio frequency channel from the uplink transmission state to the uplink reception state in the device 400 requires a certain transceiving state transition time. Therefore, in actual operation, the time for occupying the unlicensed spectrum may be slightly shorter than the above time. For example, the preset time can be determined according to the performance of the radio device of the real access network device, for example, 10 μs, 20 μs or 30 μs. Since the transceiving state transition time is very short, it can be ignored. Therefore, in the description of the embodiment of the present invention, the transceiver status transition time may not be counted in the time when the processing unit 420 occupies the unlicensed spectrum, or if the transceiver status transition time is separately counted, The sum of the transceiving transition time and the occupied time is equal to the length of time between the UE starting to receive the second uplink scheduling signaling and sending the second data packet.

FIG. 5 is a schematic structural diagram of another device using an unlicensed spectrum according to an embodiment of the present invention. As shown in FIG. 5, device 500 includes a processor 510, a memory 520, a communication interface 530, and a bus 540 that stores execution instructions that, when the device is running, the processor 510 and the storage The devices 520 are in communication via a bus 530, which receives information via the communication interface 530 and performs the steps of all disclosed methods of the embodiments of the present invention in accordance with computer instructions stored in the memory 520.

Optionally, the processing unit 420 in the embodiment of the present invention provided in FIG. 4 may correspond to the processor 510 herein, that is, the processor 510 can implement all functions that the processing unit 420 can implement. The receiving unit 410 and the sending unit 430 in the embodiment of the present invention provided in FIG. 4 can correspond to the communication interface 530 herein, that is, the communication interface 530 can implement all the functions that the receiving unit 410 and the sending unit 430 can implement.

The processor 510 can be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, and discrete hardware. Component. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The access network device 500 can also implement or perform the various methods, steps, and logic blocks disclosed in the various embodiments of the present invention. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The computer instructions can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory 520, and processor 510 reads the information in memory 520 and, in conjunction with its hardware, performs the steps of the methods of the various embodiments.

Those skilled in the art can understand and implement all the processes in the above embodiments. They can all be implemented by computer program instructions in conjunction with related hardware.

The definitions of the application scenarios and the like in the above embodiments are only for explaining the specific technical solutions of the present invention, and are not limited thereto. That is, it is possible to modify the technical solutions described in the foregoing embodiments, or to replace the technical features therein, and the modifications and substitutions do not affect the scope of protection of the present invention.

Claims

A method of using an unlicensed spectrum, the method comprising:

The access network device receives scheduling request information sent by the user equipment UE, where the scheduling request information is used to request channel resources for uplink transmission;

The access network device detects whether the unlicensed spectrum is idle;

The access network device starts to occupy the unlicensed spectrum when detecting that the unlicensed spectrum is idle;

The access network device sends uplink scheduling signaling to the UE, where the uplink scheduling signaling is used to indicate the channel resource of the uplink transmission, and the channel resource of the uplink transmission is located on the unlicensed spectrum;

The access network device stops occupying the unlicensed spectrum when a predetermined time elapses after starting to send the uplink scheduling signaling;

The access network device receives a data packet sent by the UE on the unlicensed spectrum, and the data packet is sent when the UE passes the predetermined time after starting to receive the uplink scheduling signaling.
The method of claim 1 wherein said occupying said unlicensed spectrum comprises:

The access network device transmits data on the unlicensed spectrum.
The method of claim 2 wherein said data is any one of a padding sequence and a pseudo-random sequence.
The method according to any one of claims 1 to 3, wherein the sending, by the access network device, the uplink scheduling signaling to the UE comprises:

The access network device sends the uplink scheduling signaling to the UE while starting to occupy the unlicensed spectrum.
The method according to any one of claims 1 to 3, wherein the sending, by the access network device, the uplink scheduling signaling to the UE comprises:

The access network device sends the uplink scheduling signaling to the UE when the unlicensed spectrum elapsed time interval is occupied.
The method according to any one of claims 1 to 5, characterized in that in the frequency division duplex long term evolution system, the predetermined time is 4 transmission time intervals TTI.
The method according to any one of claims 1 to 6, wherein the scheduling request information and the uplink scheduling signaling are transmitted on a licensed spectrum.
The method according to any one of claims 1 to 7, wherein the uplink scheduling signaling is first uplink scheduling signaling, the data packet is a first data packet, and the predetermined time is a first predetermined time. The first data packet includes the amount of data that needs to be transmitted in the uplink transmission buffer of the UE, and the method further includes:

When the access network device finishes receiving the first data packet, the access network device starts to occupy the unlicensed spectrum;

The access network device sends a second uplink scheduling signaling to the UE according to the quantity of the data to be transmitted, where the second uplink scheduling signaling is used to indicate that the UE needs to transmit in the uplink transmission buffer area. Channel resources of the data, the channel resources for transmitting data to be transmitted in the uplink transmission buffer area of the UE are located on the unlicensed spectrum;

The access network device stops occupying the unlicensed spectrum when a second predetermined time elapses after starting to send the second uplink scheduling signaling;

Receiving, by the access network device, a second data packet sent by the UE on the unlicensed spectrum, where the second data packet is after the UE starts to receive the second uplink scheduling signaling Send at the time of the second scheduled time.
The method of claim 8 wherein said second uplink scheduling signaling is transmitted on an authorized spectrum.
An access network device, the device comprising:

a receiving unit, configured to receive scheduling request information sent by the user equipment UE, where the scheduling request information is used to request channel resources for uplink transmission;

The processing unit is configured to detect whether an unlicensed spectrum is idle;

The processing unit is further configured to start occupying the unlicensed spectrum when detecting that the unlicensed spectrum is idle;

a sending unit, configured to send uplink scheduling signaling to the UE when the unlicensed spectrum is idle, where the uplink scheduling signaling is used to indicate channel resources of the uplink transmission, and the uplink The transmitted channel resource is located on the unlicensed spectrum;

The processing unit is further configured to stop occupying the unlicensed spectrum when the signaling unit starts transmitting the uplink scheduling and the signaling passes a predetermined time;

The receiving unit is further configured to receive a data packet sent by the UE on the unlicensed spectrum, where the data packet is sent when the UE passes the predetermined time after starting to receive the uplink scheduling signaling.
The access network device according to claim 10, wherein the processing unit occupies the unlicensed spectrum comprises:

The processing unit triggers the transmitting unit to transmit data on the unlicensed spectrum.
The access network device of claim 11, wherein the data is any one of a padding sequence and a pseudo-random sequence.
The access network device according to any one of claims 10 to 12, wherein the sending, by the sending unit, uplink scheduling signaling to the UE includes:

While the processing unit occupies the unlicensed spectrum, the sending unit sends the uplink scheduling signaling to the UE.
The access network device according to any one of claims 10 to 12, wherein the sending, by the sending unit, uplink scheduling signaling to the UE includes:

When the processing unit occupies the unlicensed spectrum elapsed time interval, the sending unit sends the uplink scheduling signaling to the UE.
The access network device according to any one of claims 10 to 14, wherein in the long term evolution system using frequency division duplexing, the predetermined time is 4 transmission time intervals TTI.
The access network device according to any one of claims 10 to 15, wherein the scheduling request information received by the receiving unit and the uplink scheduling signaling sent by the sending unit are transmitted on a licensed spectrum.
The access network device according to any one of claims 10 to 16, wherein the uplink scheduling signaling is first uplink scheduling signaling, the data packet is a first data packet, and the predetermined time is The first data packet received by the receiving unit includes an amount of data to be transmitted in the uplink transmission buffer area of the UE, in a predetermined time;

The processing unit is further configured to start occupying the unlicensed spectrum when the receiving unit finishes receiving the first data packet;

The sending unit is further configured to send the second uplink scheduling signaling to the UE according to the quantity of the data to be transmitted, where the second uplink scheduling signaling is used to indicate that the data to be transmitted in the uplink transmission buffer is transmitted. a channel resource, where the channel resource for transmitting data to be transmitted in the uplink transmission buffer area of the UE is located on the unlicensed spectrum;

The processing unit is further configured to stop occupying the unlicensed spectrum when a second predetermined time elapses after the sending unit sends the second uplink scheduling signaling;

The receiving unit is further configured to receive a second data packet sent by the UE on the unlicensed spectrum, where the second data packet is that the UE starts to receive the second uplink scheduling signaling Send at the time of the second scheduled time.
The access network device according to claim 17, wherein the second uplink scheduling signaling sent by the sending unit is transmitted on an authorized spectrum.