CN105659678A - Uplink data transmission method and related device - Google Patents

Uplink data transmission method and related device Download PDF

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Publication number
CN105659678A
CN105659678A CN201480034561.1A CN201480034561A CN105659678A CN 105659678 A CN105659678 A CN 105659678A CN 201480034561 A CN201480034561 A CN 201480034561A CN 105659678 A CN105659678 A CN 105659678A
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China
Prior art keywords
user equipment
frequency band
access network
uplink data
data
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CN201480034561.1A
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Chinese (zh)
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CN105659678B (en
Inventor
李秉肇
苗金华
权威
张戬
杨晓东
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Zhuji Tuan Knitting Co.,Ltd.
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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

Abstract

Disclosed are an uplink data transmission method and a related device. The method comprises: a user equipment using an unauthorized frequency band to send uplink data to a radio access network device; the user equipment acquiring backoff information, wherein the backoff information is used for instructing the user equipment to stop sending data on the unauthorized frequency band within a backoff duration; and the user equipment stopping sending the data on the unauthorized frequency band within the backoff duration according to the backoff information. By means of the present invention, an unauthorized frequency band can be effectively used to transmit uplink data.

Description

Uplink data transmission method and related equipment Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a related device for transmitting uplink data.
Background
The unlicensed spectrum includes frequency bands for Industrial, scientific and medical (ISM) devices, such as three bands 902-. According to the statistics of the newly released FCC international spectrum white paper, the resources of the unauthorized spectrum are far greater than those of the authorized spectrum. However, with the rapid development of packet services and wireless functions on intelligent terminals, the demand of high-speed and large-data-volume services for spectrum is increasing, and the transmission of data only through authorized spectrum resources may cause limitations on the transmission of high-speed and large-data-volume services.
Disclosure of Invention
The embodiment of the invention provides an uplink data transmission method and related equipment, which can effectively utilize an unauthorized frequency band to transmit uplink data.
In a first aspect, an embodiment of the present invention provides a method for transmitting uplink data, including:
the user equipment sends uplink data to the wireless access network equipment by using the unlicensed frequency band;
the user equipment acquires backoff information, wherein the backoff information is used for indicating the user equipment to stop sending data on the unauthorized frequency band within backoff duration;
and the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
With reference to the first aspect, in a first possible implementation manner, the obtaining, by the user equipment, backoff information includes:
the user equipment receives backoff information sent by the wireless access network equipment, wherein the backoff information is sent after the wireless access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
With reference to the first aspect, in a second possible implementation manner, the obtaining, by the user equipment, backoff information includes:
the user equipment determines the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner, before the user equipment sends uplink data to the radio access network device by using an unlicensed frequency band, the method further includes:
and if the user equipment does not reach uplink synchronization, the user equipment sends a preamble sequence to the wireless access network equipment by using an unauthorized frequency band.
With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, in a fourth possible implementation manner, before the user equipment sends uplink data to the radio access network device by using an unlicensed frequency band, the method further includes:
if the user equipment determines that the unauthorized frequency band is in an idle state in the subframe n-1, the user equipment occupies the unauthorized frequency band by sending occupied information until the ending time of the subframe n-1, wherein the occupied information at least comprises preset occupied symbols.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the occupancy information further includes a data scheduling request, and the method further includes:
the user equipment receives data scheduling information issued by the wireless access network equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and redundancy versions used for data transmission;
the method for the user equipment to send uplink data to the radio access network equipment by using the unlicensed frequency band comprises the following steps:
and the user equipment uses an unauthorized frequency band to send uplink data to the wireless access network equipment based on the data scheduling information.
With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the unlicensed frequency band is divided into a preset number of frequency band intervals; the method further comprises the following steps:
the user equipment seizes the non-authorized frequency band resource on a target frequency band interval of the non-authorized frequency band, the user equipment is configured with a preset network identification, and the network identification is associated with the target frequency band interval;
the method for the user equipment to send uplink data to the radio access network equipment by using the unlicensed frequency band comprises the following steps:
and the user equipment transmits uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, after the user equipment uses an unlicensed frequency band to send uplink data to a radio access network device, the method further includes:
and the user equipment receives feedback information issued by the wireless access network equipment in response to the uplink data, and detects whether the uplink data needs to be retransmitted according to the feedback information, wherein the feedback information comprises acknowledgement feedback information ACK for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK for indicating that the wireless access network equipment does not receive the uplink data.
With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, the receiving, by the user equipment, feedback information sent by the radio access network equipment in response to the uplink data includes:
the user equipment detects whether feedback information sent by the radio access network equipment in response to the uplink data is received in an unauthorized frequency band within a set time window after the user equipment sends the uplink data, wherein the time window is notified by the radio access network equipment through a broadcast message or a radio resource control protocol (RRC) signaling or is a preset fixed value;
if the user equipment does not receive the feedback information on the unauthorized frequency band, the user equipment directly determines the feedback information as Acknowledgement (ACK) feedback information; or, if the user equipment does not receive the feedback information on the unauthorized frequency band, the user equipment receives the feedback information on the authorized frequency band according to the preset feedback position offset.
With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, or the seventh possible implementation manner of the first aspect, or the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, before the user equipment sends uplink data to a radio access network device by using the unlicensed frequency band, the method further includes:
the user equipment configures a serial number for uplink data to be sent, so that the radio access network equipment obtains sending state information corresponding to the uplink data according to the serial number when receiving the uplink data, wherein the sending state information comprises the sending time and/or the data size of the uplink data.
In a second aspect, an embodiment of the present invention further provides another uplink data transmission method, including:
the method comprises the steps that the wireless access network equipment receives uplink data sent by user equipment by using an unauthorized frequency band;
the wireless access network equipment detects whether the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value; or, the radio access network device detects whether the time length of the uplink data sent by the user equipment exceeds a preset time threshold;
and if so, the wireless access network equipment generates backoff information and informs the user equipment of backoff duration corresponding to the backoff information through a broadcast message or a unicast message, so that the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
With reference to the second aspect, in a first possible implementation manner, before the radio access network device receives uplink data sent by a user equipment using an unlicensed frequency band, the method further includes:
the wireless access network equipment receives a preamble sequence sent by user equipment by using an unauthorized frequency band;
and the wireless access network equipment calculates the time lead according to the preamble sequence and sends the time lead to the user equipment, so that the user equipment adjusts the sending time of the user equipment according to the time lead to achieve uplink synchronization.
With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, before the radio access network device receives uplink data that is sent by a user equipment using an unlicensed frequency band, the method further includes:
if a data scheduling request sent by the user equipment is received, the wireless access network equipment configures data scheduling information for the user equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and a redundancy version used for data transmission;
and the wireless access network equipment sends the data scheduling information to the user equipment so that the user equipment uses an unlicensed frequency band to send uplink data to the wireless access network equipment based on the data scheduling information.
With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner, before the radio access network device receives uplink data that is sent by a user equipment using an unlicensed frequency band, the method further includes:
the wireless access network equipment divides an unauthorized frequency band into a preset number of frequency band intervals, and configures a network identifier for user equipment so that the user equipment occupies unauthorized frequency band resources on a target frequency band interval of the unauthorized frequency band, wherein the network identifier is associated with the target frequency band interval;
the method for receiving the uplink data sent by the user equipment by using the unlicensed frequency band by the radio access network equipment comprises the following steps:
and the wireless access network equipment receives the uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, in a fourth possible implementation manner, after the radio access network device receives uplink data sent by a user equipment using an unlicensed frequency band, the method further includes:
the wireless access network equipment decodes the uplink data and generates feedback information according to a decoding result, wherein the feedback information comprises acknowledgement feedback information ACK which is used for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK which indicates that the wireless access network equipment does not receive the uplink data;
and the wireless access network equipment sends the feedback information to the user equipment.
With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the sending, by the radio access network device, the feedback information to the user equipment includes:
the wireless access network equipment detects whether an idle unauthorized frequency band exists in a preset time window;
if an idle unauthorized frequency band exists, the wireless access network equipment uses the idle unauthorized frequency band to send the feedback information to the user equipment;
and if the idle unauthorized frequency band does not exist, the wireless access network equipment uses the authorized frequency band to send the feedback information to the user equipment, or does not send the feedback information to the user equipment.
In a third aspect, an embodiment of the present invention further provides a user equipment, including:
a sending module, configured to send uplink data to the radio access network device using an unlicensed frequency band;
an obtaining module, configured to obtain backoff information, where the backoff information is used to instruct a user equipment to stop sending data in the unlicensed frequency band within a backoff duration;
and the backoff module is used for stopping sending data on the unauthorized frequency band within the backoff duration according to the backoff information acquired by the acquisition module.
With reference to the third aspect, in a first possible implementation manner, the obtaining module is specifically configured to:
receiving backoff information sent by the radio access network equipment, wherein the backoff information is sent after the radio access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value, or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
With reference to the third aspect, in a second possible implementation manner, the obtaining module is specifically configured to:
determining the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner, the user equipment further includes:
and the synchronization module is used for sending a preamble sequence to the wireless access network equipment by using the unauthorized frequency band when uplink synchronization is not achieved.
With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the user equipment further includes:
and the occupation module is used for occupying the unauthorized frequency band by sending occupation information until the ending time of the subframe n-1 when the unauthorized frequency band is determined to be in an idle state in the subframe n-1, wherein the occupation information at least comprises preset occupation symbols.
With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the occupancy information further includes a data scheduling request, and the user equipment further includes:
a first receiving module, configured to receive data scheduling information issued by the radio access network device according to the data scheduling request, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
the sending module is specifically configured to:
and sending uplink data to the wireless access network equipment by using an unlicensed frequency band based on the data scheduling information.
With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the unlicensed frequency band is divided into a preset number of frequency band intervals; the user equipment further comprises:
a preemption module, configured to preempt an unlicensed frequency band resource in a target frequency band interval of the unlicensed frequency band, where the user equipment is a user equipment configured with a preset network identifier, and the network identifier is associated with the target frequency band interval;
the sending module is specifically configured to:
and sending uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, the user equipment further includes:
a second receiving module, configured to receive feedback information sent by the radio access network device in response to the uplink data, and detect whether the uplink data needs to be resent according to the feedback information, where the feedback information includes acknowledgement feedback information ACK used to indicate that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK used to indicate that the radio access network device does not receive the uplink data.
With reference to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner, the second receiving module includes:
a detecting unit, configured to detect whether feedback information sent by the radio access network device in response to the uplink data is received in an unlicensed frequency band within a set time window after the uplink data is sent, where the time window is notified by the radio access network device through a broadcast message or radio resource control protocol RRC signaling or is a preset fixed value;
a confirming unit, configured to directly determine the feedback information as an acknowledgement feedback information ACK when the feedback information is not received in the unlicensed frequency band; or the like, or, alternatively,
and the information receiving unit is used for receiving the feedback information on the authorized frequency band according to the preset feedback position offset when the feedback information is not received on the unauthorized frequency band.
With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, or the seventh possible implementation manner of the third aspect, or the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner, the user equipment further includes:
a configuration module, configured to configure a sequence number for uplink data to be sent, so that the radio access network device obtains sending status information corresponding to the uplink data according to the sequence number when receiving the uplink data, where the sending status information includes a sending time and/or a data size of the uplink data.
In a fourth aspect, an embodiment of the present invention further provides a radio access network device, including:
the data receiving module is used for receiving uplink data sent by user equipment by using an unauthorized frequency band;
a detection module, configured to detect whether a data amount of uplink data sent by the user equipment exceeds a preset data amount threshold, or detect whether a time length of the uplink data sent by the user equipment exceeds a preset time threshold;
and the first generation module is used for generating backoff information when the detection result of the detection module is over, and notifying the backoff duration corresponding to the backoff information to the user equipment through a broadcast message or a unicast message, so that the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
With reference to the fourth aspect, in a first possible implementation manner, the radio access network device further includes:
a sequence receiving module, configured to receive a preamble sequence sent by a user equipment using an unlicensed frequency band;
and the calculating module is used for calculating the time lead according to the preamble sequence and sending the time lead to the user equipment so that the user equipment adjusts the sending time of the user equipment according to the time lead to achieve uplink synchronization.
With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the radio access network device further includes:
an information configuration module, configured to configure data scheduling information for the user equipment according to a data scheduling request sent by the user equipment when the data scheduling request is received, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
a first sending module, configured to send the data scheduling information to the user equipment, so that the user equipment sends uplink data to the radio access network device using an unlicensed frequency band based on the data scheduling information.
With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the radio access network device further includes:
the device comprises a dividing module, a judging module and a judging module, wherein the dividing module is used for dividing an unauthorized frequency band into a preset number of frequency band intervals and configuring a network identifier for user equipment so that the user equipment can seize resources of the unauthorized frequency band on a target frequency band interval of the unauthorized frequency band, and the network identifier is associated with the target frequency band interval;
the data receiving module is specifically configured to:
and receiving uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, or the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the radio access network device further includes:
a second generating module, configured to decode the uplink data, and generate feedback information according to a decoding result, where the feedback information includes acknowledgement feedback information ACK indicating that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK indicating that the radio access network device does not receive the uplink data;
and the second sending module is used for sending the feedback information to the user equipment.
With reference to the fourth aspect, in a fourth possible implementation manner, in a fifth possible implementation manner, the second sending module includes:
the frequency band detection unit is used for detecting whether an idle unauthorized frequency band exists in a preset time window;
a first information sending unit, configured to send the feedback information to the user equipment by using an idle unlicensed frequency band when the idle unlicensed frequency band exists;
a second information sending unit, configured to send the feedback information to the user equipment using an authorized frequency band or not sending the feedback information to the user equipment when there is no idle unlicensed frequency band.
The implementation of the invention has the following beneficial effects:
the embodiment of the invention can send the uplink data to the wireless access network equipment through the unauthorized frequency band, and when the backoff information is obtained, the user equipment stops sending the data on the unauthorized frequency band within the backoff duration corresponding to the backoff information, thereby realizing the effective use of the unauthorized frequency band for transmitting the uplink data.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for transmitting uplink data according to an embodiment of the present invention;
fig. 2 is a timing diagram of a method for transmitting uplink data according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating another uplink data transmission method according to an embodiment of the present invention;
fig. 4 is an interaction diagram of a method for transmitting uplink data according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another user equipment provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a radio access network device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another radio access network device provided in the embodiment of the present invention;
fig. 9 is a schematic structural diagram of another user equipment provided in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another radio access network device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
Moreover, various aspects or features of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard Disk, floppy Disk, magnetic strips, etc.), optical disks (e.g., CD (Compact Disk), DVD (Digital Versatile Disk), etc.), smart cards, and flash Memory devices (e.g., EPROM (Erasable Programmable Read-Only Memory), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
Fig. 1 is a schematic flow chart of a method for transmitting uplink data according to an embodiment of the present invention, where the method according to the embodiment of the present invention is applicable to a User Equipment (UE) such as a mobile phone and a tablet computer, and specifically, the method according to the embodiment of the present invention includes:
s101: and the user equipment sends uplink data to the wireless access network equipment by using the unlicensed frequency band.
It should be noted that the unlicensed frequency band is a frequency band that can be used without being approved and approved by a country or a local party, and a device using the unlicensed frequency band needs to acquire the right of use of the unlicensed frequency band through competition.
In a specific embodiment, when a User Equipment (UE) needs to send uplink data, it may listen to whether a free unlicensed spectrum channel exists currently. Specifically, the ue may listen according to a preset listening rule when listening to the channel. The listening rule may include a listening time, a back-off (backoff) time, a power threshold or an energy threshold, etc., and may be notified by a radio access network device, such as an evolved base station eNB in an LTE communication system.
Optionally, before listening whether there is a free unlicensed spectrum resource, the user equipment may receive, through an unlicensed frequency band or an licensed frequency band, unlicensed spectrum information sent by the radio access network equipment, and listen whether there is a free unlicensed frequency band on the unlicensed frequency band indicated by the unlicensed frequency band information. The unlicensed spectrum information may include information such as a frequency domain width and a center frequency point of the unlicensed spectrum resource. Further, if the user equipment receives the unlicensed spectrum information on the licensed frequency band, the unlicensed spectrum carrier may be activated according to the unlicensed spectrum information.
In a specific embodiment, after the user equipment monitors an idle unlicensed frequency band and preempts the unlicensed frequency band, the user equipment may directly send uplink data carrying a preamble sequence to the radio access network equipment, so that the radio access network equipment can distinguish different users through the preamble sequence.
Further, if the user equipment does not reach uplink synchronization, the user equipment may send a preamble sequence to the radio access network equipment, so that the radio access network equipment controls the user equipment to implement uplink synchronization according to the preamble sequence.
Specifically, if the user equipment determines that the unlicensed frequency band is in an idle state in the subframe n-1, in order to align frames, the user equipment may occupy the unlicensed frequency band by sending occupied information until the end time of the subframe n-1, where the occupied information at least includes a preset occupied symbol, and the unlicensed frequency band may be occupied by the preset occupied symbol, such as a padding symbol or a sounding symbol. And when detecting that the frame alignment reaches the starting moment of the subframe n, the user equipment can use the unlicensed frequency band to send uplink data to the radio access network equipment. Wherein n is an integer and n is more than or equal to 1.
Further, please refer to fig. 2, which is a timing diagram of a method for transmitting uplink data according to an embodiment of the present invention, as shown in fig. 2, a ue senses that an unlicensed frequency band is idle at a certain time of a subframe 1, and the ue does not reach uplink synchronization. The user equipment may send a preamble sequence to the radio access network equipment, and the radio access network equipment calculates a Time Advance (TA) according to the preamble sequence and sends the Time Advance to the user equipment, so as to instruct the user equipment to adjust the sending Time of uplink data according to the Time Advance, thereby achieving uplink synchronization. When synchronization is achieved, the user equipment can occupy the unauthorized frequency band by filling occupied symbols such as padding or sounding in the unaligned subframe 1, so as to prevent other equipment from occupying resources; when the subframe is aligned, that is, when the subframe reaches subframe 2, the user equipment may send the corresponding uplink data to the radio access network equipment through the unlicensed frequency band.
Further, the occupancy information may further include a data scheduling Request, for example, when the radio access network device receives a Scheduling Request (SR), a bsr (buffer status report) or a sounding reference signal (SRs detection signal) sent by the user equipment, so as to assist the base station in performing MCS (MCS) and resource allocation, the data scheduling Request may be received, where the SR is used to notify the radio access network device that the user equipment needs to send uplink data, so as to Request the radio access network device for uplink physical resources; the BSR is configured to notify the radio access network device of how much data the user equipment has to send; the SRS may be used to assist the radio access network device in resource allocation. Before the user equipment sends uplink data to the radio access network equipment, the user equipment may further receive data scheduling information issued by the radio access network equipment according to the data scheduling request, where the data scheduling information may include configuration parameters such as a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission, and when the user equipment sends the uplink data to the radio access network equipment, the user equipment may perform data transmission based on the data scheduling information. Specifically, the data scheduling information may be issued by the radio access network device before the uplink data is sent each time, that is, the user equipment corresponds to different data scheduling information each time the uplink data is sent; or fixed data scheduling information is used when the user equipment sends uplink data each time, for example, the fixed data scheduling information may be carried when the radio access network equipment sends an uplink grant UL grant to the user equipment, and the user equipment sends all uplink data based on the fixed data scheduling information in the whole data transmission process.
Alternatively, a Network Identity such as an unlicensed Radio Network Temporary Identity (U-RNTI) may be defined. Specifically, the unlicensed frequency band may be divided into a preset number of frequency band intervals, and when a user equipment occupies the unlicensed frequency band, the user equipment may specifically occupy unlicensed spectrum resources in a specified frequency band interval, that is, a target frequency band interval, where the user equipment is a user equipment configured with a preset network identifier such as U-RNTI, and the U-RNTI is associated with the target frequency band interval. Specifically, the radio access network device may divide the user equipment into different groups by the U-RNTI of the user equipment, and the user equipment having the same U-RNTI may be divided into the same group. The U-RNTI of the user equipment can be obtained by the radio access network equipment through pre-configuration. Meanwhile, the radio access network equipment can divide the unauthorized frequency band into different frequency band intervals, so that the user equipment using the same U-RNTI is divided into the user equipment in the same group, and resources can be preempted in the unauthorized frequency band interval, namely the target frequency band interval of a certain smaller unit, thereby reducing the waste of resources. Specifically, the user equipment in each group may use the same resource location, modulation and coding scheme, etc. so that the user equipment may access the unlicensed frequency band in the uplink. The Radio access network device may notify the U-RNTI and the target frequency band interval to be preempted to the user equipment in a broadcast, Radio Resource Control (RRC) signaling, or the like manner.
S102: and the user equipment acquires back-off information, wherein the back-off information is used for indicating the user equipment to stop sending data on the unauthorized frequency band within the back-off duration.
Optionally, the backoff (backoff) information obtained by the user equipment may be backoff information sent by the received radio access network equipment, where the backoff information is sent after the radio access network equipment detects that the data amount of the uplink data sent by the user equipment exceeds a preset data amount threshold, or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold.
In particular, the data volume threshold or the time threshold may be set by the radio access network device based on the load condition. The backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment, which is not limited in the embodiment of the present invention.
Optionally, the backoff information acquired by the ue may also be backoff information determined by the ue after detecting that the data amount for sending the uplink data exceeds a data amount threshold, or that the time length for sending the uplink data exceeds a time threshold;
specifically, at least one of the data amount threshold, the time threshold, and the backoff duration may be notified to the user equipment by the radio access network device through a broadcast message or a unicast message, for example, through a dedicated signaling, such as an RRC message, a MAC CE indication, or a physical layer control signaling, or the data amount threshold, the time threshold, and the backoff duration may be preset by the user equipment.
S103: and the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
Further, the user equipment backs off the unauthorized frequency band within the back-off duration, that is, after the data transmission on the unauthorized frequency band is stopped within the back-off duration, if the unauthorized frequency band is still available, the data is transmitted through the unauthorized frequency band; if the unauthorized frequency band is not available, the user equipment can listen to whether an idle unauthorized frequency band exists again, and preempt the unauthorized frequency band when the idle unauthorized frequency band exists, and the user equipment sends data to the wireless access network equipment through the preempted unauthorized frequency band. Specifically, the transmitted data includes the remaining uplink data and/or other newly-added data that needs to be transmitted.
Further, after the user equipment sends the uplink data to the radio access network equipment through the unlicensed frequency band, the user equipment may further receive feedback information issued by the radio access network equipment in response to the uplink data, and determine whether the uplink data needs to be resent according to the feedback information, where the feedback information includes Acknowledgement (ACK) information indicating that the radio access network equipment receives the uplink data sent by the user equipment or Negative Acknowledgement (NACK) information indicating that the radio access network equipment does not receive the uplink data. Specifically, the ue may detect whether feedback information sent by the radio access network device in response to the uplink data is received in an unlicensed frequency band within a set time window after the uplink data is sent, where the time window is notified by the radio access network device through a broadcast message or radio resource control protocol RRC signaling or other notification manner. Further, if the user equipment does not receive the feedback information in the unlicensed frequency band, the user equipment may directly determine the feedback information as an acknowledgement feedback information ACK; or the user equipment receives the feedback information on the authorized spectrum channel according to the preset feedback position offset, so as to avoid the conflict between the user equipment and the feedback resource of the authorized spectrum channel on the LTE system, namely the scheduling user equipment.
It should be noted that the unauthorized frequency band for the user equipment to send the uplink data may be the whole frequency band indicated by the unauthorized spectrum information issued by the radio access network equipment, or a partial frequency band in the frequency band indicated by the unauthorized spectrum information, that is, the user equipment may send UL data through the whole frequency band indicated by the unauthorized spectrum information issued by the radio access network equipment, or send UL data through the partial frequency band in the frequency band indicated by the unauthorized spectrum information, which is not limited in the embodiment of the present invention.
Optionally, if the user equipment sends UL data through a partial frequency band in a frequency band indicated by the unlicensed spectrum information sent by the radio access network equipment, when the radio access network equipment sends the feedback information through a DL feedback Channel, resource position mapping of a Physical HARQ Indication Channel (PHICH) in a Physical layer HARQ Indication Channel may be identified by a pair of sequences, that is (), where a group number of the PHICH is an orthogonal sequence code in the group, and may be specifically determined by the following formula:
wherein n isDMRSIndicating a cyclic shift of a DM-RS (demodulation reference signal), which is a DL demodulation signal pre-configured by the radio access network device for each user equipment, so that the user equipment realizes DL demodulation when receiving the feedback information; the method comprises the steps of representing expansion factors in a physical layer channel, and specifically setting the expansion factors according to different PHICH formats; i isPRB_RAIndicating a frequency domain position corresponding to a first time slot of user equipment in the UL data transmission process; indicating the number of PHICH groups; i isPHICHThe channel coefficient related to the TDD configuration is set according to the TDD configuration condition, and is used for distinguishing the feedback information of the UL subframes when the same DL subframe contains the feedback information of a plurality of UL subframes.
Optionally, if the user equipment sends UL data through the entire frequency band indicated by the unlicensed spectrum information sent by the radio access network equipment, when the radio access network equipment sends the feedback information through the DL feedback channel, the PHICH feedback position () corresponding to the feedback information sent by the radio access network equipment may be determined by the following formula:
wherein a relationship in which a location mapping with respect to a UL frequency domain resource is defaulted in determining the PHICH feedback location.
In a specific embodiment, if the feedback information received by the user equipment is NACK, indicating that the user equipment needs to perform data retransmission, the user equipment may resend the uplink data to the radio access network equipment through an unlicensed frequency band, or the user equipment may retransmit the uplink data through an licensed frequency band, which is not limited in the embodiment of the present invention. Specifically, the user equipment may preempt the unlicensed frequency band according to a time window notified to the user equipment by the radio access network equipment, and if the user equipment preempts the unlicensed frequency spectrum resources within the time window, the user equipment may retransmit the uplink data on a channel corresponding to the unlicensed frequency spectrum resources. Further, if the unauthorized spectrum resources cannot be preempted and the current maximum retransmission times is not reached, the radio access network equipment sends a NACK message to the user equipment, and the user equipment repeatedly executes the preemption operation; and if the maximum retransmission times are reached, the wireless access network equipment does not perform any operation. For example, the user equipment sends uplink data to the radio access network equipment in the subframe n, and receives feedback information sent by the radio access network equipment in response to the uplink data when the subframe n +4 is performed, and the feedback information is NACK, the user equipment may listen to whether the unlicensed frequency band is idle in a set time window after the subframe n +4, and seize the unlicensed frequency band when the feedback information is idle, and if the unlicensed frequency band is seized, the user equipment may resend the uplink data to the radio access network equipment in the time window.
Optionally, when data transmission is performed, DL may be transmitted according to a frame structure of LTE, and UL may be transmitted according to a Wi-Fi frame structure. When the amount of UL data is small, if the UL data is still transmitted according to the full bandwidth, a great waste is caused. Therefore, a data size threshold may also be preset, and if the size of the UL data that needs to be transmitted is smaller than the threshold, the ue may control to reduce the transmission time unit of the UL data when transmitting the UL data, for example, reduce the transmission time unit to a shorter granularity (e.g., reduce 1 ms/subframe to 1 us/subframe) in a symbol-level manner.
However, if the transmission Time unit of the UL data is reduced, the Time units of the downlink DL and the uplink UL are not consistent, which may cause a timing feedback problem, that is, after the UL transmits a plurality of data packets, the DL has not reached the feedback Time yet, thereby causing an increase of Round-Trip Time (RTT). In order to solve the above timing feedback problem, any one of the following solutions may be adopted:
1) the radio access network device forms a feedback Information group from the feedback Information of the UL data for a plurality of user equipments, and feeds the feedback Information group back to the user equipment, and specifically, the radio access network device may issue the feedback Information group to the user equipment through an MAC CE (MAC CE) or through Downlink Control Information (DCI);
2) the user equipment repeatedly sends a plurality of subframes on the UL resources, and the MAC layer or the physical layer (PHY) of the wireless access network equipment does not perform feedback at the moment;
3) the feedback is not performed through the MAC layer or the PHY layer of the radio access network device, but is performed through an rlc (radio Link control) layer to the user equipment.
Further, before the user equipment sends uplink data to the radio access network equipment through the unlicensed frequency band, the user equipment may further receive an uplink grant UL grant carrying a preconfigured sequence number and sent by the radio access network equipment, and associate the sequence number with uplink data to be sent, so that the radio access network equipment obtains sending status information corresponding to the uplink data according to the sequence number when receiving the uplink data, where the sending status information includes a sending time and/or a data size of the uplink data.
The user equipment can perform channel interception based on the unlicensed spectrum resource information issued by the wireless access network equipment, seize the unlicensed frequency band when intercepting the idle unlicensed frequency band, and send uplink data to the wireless access network equipment through the unlicensed frequency band after the user equipment achieves uplink synchronization.
Please refer to fig. 3, which is a flowchart illustrating another uplink data transmission method according to an embodiment of the present invention, where the method according to the embodiment of the present invention is applicable to a radio access network device, such as an enodeb radio access network device, and specifically, the method according to the embodiment of the present invention includes:
s201: and the wireless access network equipment receives uplink data sent by the user equipment by using the unlicensed frequency band.
Optionally, before the radio access network device receives uplink data sent by the user equipment using the unlicensed frequency band, if the radio access network device receives a preamble sequence sent by the user equipment using the unlicensed frequency band, the radio access network device may calculate a time advance TA according to the preamble sequence and send the time advance to the user equipment, so that the user equipment adjusts its sending time according to the time advance to achieve uplink synchronization.
Further, if receiving a data scheduling request sent by the user equipment, the radio access network equipment may configure data scheduling information for the user equipment according to the data scheduling request, and send the data scheduling information to the user equipment, so that the user equipment uses an unlicensed frequency band to send uplink data to the radio access network equipment based on the data scheduling information. Specifically, when receiving an SR, BSR, or SRs signal transmitted by the user equipment, the signal may be used as a data scheduling request. The data scheduling information may include a modulation and coding scheme, a physical resource, a redundancy version, and the like used for data transmission.
Optionally, the radio access network device may further divide an unlicensed frequency band into a preset number of frequency band intervals, and configure a network identifier for the user equipment, so that the user equipment occupies an unlicensed frequency band resource in a target frequency band interval of the unlicensed frequency band, where the network identifier is associated with the target frequency band interval; when receiving uplink data sent by the user equipment using the unlicensed frequency band, the radio access network device may use the target frequency band interval of the unlicensed frequency band to receive the uplink data sent by the user equipment. Specifically, the radio access network device may configure a U-RNTI for each user equipment, divide the user equipment into different groups by the U-RNTI of the user equipment, and divide the user equipment having the same U-RNTI into the same group. Furthermore, the radio access network equipment can divide the unauthorized frequency band into different frequency band intervals, so that the user equipment using the same U-RNTI is divided into the user equipment in the same group, and resources can be preempted in the unauthorized frequency band of a certain smaller unit, namely the target frequency band interval, thereby reducing the waste of resources. The user equipment in each group may use the same resource location, modulation and coding scheme, etc. so that the user equipment may access the unlicensed frequency band in an uplink. The radio access network equipment can inform the user equipment of the U-RNTI and the target frequency band interval needing to be preempted in the modes of broadcasting, RRC signaling and the like.
S202: the radio access network equipment detects whether the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value or whether the time length of the uplink data sent by the user equipment exceeds a preset time threshold value.
S203: and if so, the wireless access network equipment generates backoff information and informs the user equipment of backoff duration corresponding to the backoff information through a broadcast message or a unicast message.
In a specific embodiment, in a process of receiving uplink data sent by a user equipment, a radio access network device, such as a radio access network device, may detect whether a data amount of the uplink data sent by the user equipment exceeds a preset data amount threshold, or detect whether a time length of the uplink data sent by the user equipment exceeds a preset time threshold, and when the data amount exceeds the preset time threshold, send back-off information to the user equipment, and notify the user equipment of a back-off duration corresponding to the back-off information, so that the user equipment stops sending data on the unlicensed frequency band within the back-off duration according to the back-off information.
Further, after receiving uplink data sent by user equipment using an unlicensed frequency band, the radio access network equipment may decode the uplink data and generate feedback information according to a decoding result, where the feedback information includes acknowledgement feedback information ACK indicating that the radio access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK indicating that the radio access network equipment does not receive the uplink data; and the wireless access network equipment sends the feedback information to the user equipment. Specifically, the sending, by the radio access network device, the feedback information to the user equipment may specifically be: the wireless access network equipment detects whether an idle unauthorized frequency band exists in a preset time window; if an idle unauthorized frequency band exists, the wireless access network equipment uses the idle unauthorized frequency band to send the feedback information to the user equipment; and if the idle unauthorized frequency band does not exist, the wireless access network equipment uses the authorized frequency band to send the feedback information to the user equipment, or does not send the feedback information to the user equipment.
By implementing the embodiment of the invention, the wireless access network equipment can receive the uplink data sent by the user equipment through the unauthorized frequency band, and when the back-off information is generated when the data volume of the uplink data sent by the user equipment is detected to exceed the preset data volume threshold value or the time length of the uplink data sent by the user equipment is detected to exceed the preset time threshold value, the user equipment stops sending the data on the unauthorized frequency band within the back-off duration corresponding to the back-off information, so that the purpose of effectively using the unauthorized frequency band to transmit the uplink data is realized.
Please refer to fig. 4, which is an interaction diagram of a method for transmitting uplink data according to an embodiment of the present invention, where the method includes:
s301: the first base station transmits data scheduling information to the user equipment.
In a specific embodiment, the scheduling information sent by the first base station to the UE is used to instruct the UE to perform uplink data transmission, where the scheduling information may include configuration parameters such as a modulation and coding scheme used for transmitting data, a physical resource, a redundancy version, a size of a transmitted data block, an effective transmission time of data transmission, and an interception rule before transmitting data, where the effective transmission time includes an available time or an available subframe of an unlicensed frequency band, and the interception rule may be an interception time, a backoff time, a power threshold, an energy threshold, or the like. Specifically, the data scheduling information may be sent to the UE by the first base station through a broadcast message, a dedicated RRC message, a MAC CE message, or a PHY control signaling, which is not limited in the embodiment of the present invention.
In a specific embodiment, the scheduling information may be that the first base station sends to the UE through a licensed spectrum cell, specifically, the first base station may send to the UE through a primary cell or send to the UE through a secondary cell, where the primary cell or the secondary cell may be configured in a protocol in advance or configured through other messages; or the first base station may also send to the UE through the unlicensed spectrum cell.
S301 a: and the first base station sends at least one item of data scheduling information to a second base station in which the unlicensed spectrum cell is located.
In a specific embodiment, if the base station where the unlicensed spectrum cell is located is different from the first base station, the base station where the unlicensed spectrum cell is located is used as a second base station, and the first base station sends at least one item of the scheduling information to the second base station where the unlicensed spectrum cell is located.
Specifically, when the first base station sends at least one item of the scheduling information to the second base station where the unlicensed spectrum cell is located, the data scheduling information may be transmitted through an X2 interface or an Xn interface between the base stations, or the first base station accesses the core network node through an S1 interface message, and the core network node transmits the data scheduling information to the second base station.
S302: and after receiving the data scheduling information, the user equipment seizes an unauthorized frequency band based on the data scheduling information.
S303: and the user equipment transmits uplink data to the second base station by using the unauthorized frequency band based on the scheduling information.
In a specific embodiment, after receiving the data scheduling information, the UE uses the configuration parameters carried in the scheduling information to preempt the unlicensed frequency band, and sends uplink data to the second base station through the unlicensed frequency band.
Specifically, when the UE occupies the unlicensed spectrum resource, the UE may apply a configured interception rule, and before sending the uplink data, first intercept whether the unlicensed frequency band is idle, send the uplink data when intercepting that the unlicensed frequency band is idle, or send the uplink data after randomly withdrawing for a period of time according to a preset withdrawal parameter when intercepting that the unlicensed frequency band is busy. And the UE performs uplink data transmission in the configured effective transmission time period. The listening rule may include a listening time, a back-off time, a power threshold or an energy threshold, etc.
Further optionally, the UE may listen to whether the entire unlicensed spectrum is idle or not, or only listen to a partial frequency band of the entire unlicensed spectrum, for example, the UE may determine, as the listening frequency band, the unlicensed frequency band indicated by the unlicensed spectrum information by receiving the unlicensed spectrum information sent by the eNB, which is not limited in the embodiment of the present invention.
Further, after the UE occupies the unlicensed frequency band, if the UE detects that UL synchronization is not achieved, the UE may send a preamble to the second base station, and the second base station calculates a TA amount according to the preamble information of the UE and feeds the TA amount back to the UE, so as to instruct the UE to adjust a sending time of uplink data according to the TA amount, thereby achieving UL synchronization.
Further, if the UE finds that the UL frame alignment is not reached, the UE may fill an occupation symbol, such as a padding symbol or a sounding symbol, in the unaligned partial subframe to occupy the unlicensed frequency band, so as to avoid other devices from seizing resources. After frame alignment is achieved, the UE may send uplink data to the second base station.
Optionally, if the UE receives the data scheduling information on an LTE carrier, that is, an authorized frequency band, the UE may activate an unlicensed spectrum carrier according to the scheduling information, and deactivate the unlicensed spectrum carrier after the effective transmission time of data transmission included in the data scheduling information is over. When transmitting uplink data, the UE may send the uplink data of the configured size to the second base station based on the configuration parameters in the data scheduling information, such as physical resources, modulation and coding scheme, redundancy version, size of data block to be transmitted, and the like.
Further, the UE may also pre-configure a serial number SN before sending the uplink data, so that the base station where the UE is located may obtain, according to the SN, sending status information of the uplink data sent through the unlicensed frequency band, such as information of sending time and data size of the uplink data. Specifically, the SN may be initialized to 0, and is incremented by one when the eNB sends one uplink grant at a time, and is zeroed when the SN reaches the maximum value. When the UE sends a data packet carrying uplink data, the SN may be carried in each data packet header.
S304: and the second base station sends feedback information to the user equipment.
Further, after the UE sends the uplink data to the second base station through the unlicensed frequency band, the second base station may issue feedback information to the corresponding UE according to the reception condition of the uplink data.
In a specific embodiment, before the second base station successfully decodes the uplink data, it cannot determine whether the UE has sent the uplink data or the uplink data sent from what time, and assuming that each uplink subframe has the uplink data sent by the UE, the second base station can decode and feed back each uplink data, and after the second base station successfully decodes one uplink data, it can know the time when the UE sends the uplink data according to information such as a sequence number carried by a data packet carrying the uplink data.
Optionally, the second base station may also decode all the received uplink data and then feed back the decoded uplink data to the UE, where the feedback message carries ACK or NACK of the decoding condition of the uplink data, where the ACK indicates that the base station receives the uplink data sent by the UE, and the NACK indicates that the base station does not receive the uplink data, and the UE may determine whether to retransmit the uplink data according to feedback information returned by the second base station. Specifically, the feedback message may be transmitted through an unlicensed spectrum cell or through a licensed spectrum cell (e.g., a primary cell or a secondary cell). The feedback message may be a PHY message, a MAC message, or an RLC message, which is not limited in the embodiment of the present invention.
Optionally, the second base station may further carry the SN corresponding to the uplink data in the feedback message, so that the UE knows to which UL data packet the feedback information belongs.
Further, the UE may perform uplink retransmission according to the feedback message sent by the second base station. Specifically, the UE may receive downlink data sent by the base station within the effective transmission time indicated by the second base station, and if each downlink subframe has data sent by the second base station, the UE may perform feedback according to a decoding condition of the downlink data. It can be understood that the UE cannot determine whether the base station transmits data or from what time before successfully solving a downlink data. Assuming that each downlink subframe has data transmitted by the UE, the UE may perform decoding and feedback for each data. After the UE successfully decodes an uplink data, the time when the UE starts to transmit data can be known according to information such as a sequence number in the uplink data packet. Optionally, the UE may also decode all received data and then feed back the decoded data to the second base station, where the feedback message carries a decoding condition of the downlink data.
Specifically, when the UE receives the feedback information sent by the second base station within the effective transmission time corresponding to the unlicensed frequency band, the UE may further perform downlink measurement, where the downlink measurement includes measurement of crs (cell Reference signal), channel estimation, csi (channel State information) reporting, rrm (radio Resource management) measurement, and the like. In addition, since the second base station flexibly notifies the subframe type of the UE, in order for the UE to accurately know the position of the downlink subframe, in addition to notifying the position of the downlink subframe of the UE through the group scheduling method, the position of the downlink subframe may also be known in the following manner:
1) the UE monitors authorization information of other UEs to acquire whether the other UEs are in downlink subframes or not;
2) the UE monitors the UL transmission condition of other UEs;
3) the UE performs multicast notification in a D2D (device to device) manner.
Further, the second base station may perform downlink retransmission according to the UE feedback condition until a preset maximum retransmission number is reached.
By implementing the embodiment of the invention, the UE can use the unauthorized frequency band to send the uplink data based on the data scheduling information issued by the eNB, and the eNB can feed back the uplink data after receiving the uplink data sent by the UE according to the decoding condition of the uplink data, so that the UE can judge whether the uplink retransmission is needed according to the feedback information, and the purpose of effectively using the unauthorized frequency band to transmit the uplink data is realized.
Fig. 5 is a schematic structural diagram of a ue according to an embodiment of the present invention, and specifically, the ue according to the embodiment of the present invention includes: a sending module 11, an obtaining module 12 and a back-off module 13. Wherein the content of the first and second substances,
the sending module 11 is configured to send uplink data to the radio access network device by using an unlicensed frequency band;
the obtaining module 12 is configured to obtain backoff information, where the backoff information is used to instruct a user equipment to stop sending data in the unlicensed frequency band within a backoff duration.
Optionally, the backoff (backoff) information obtained by the obtaining module 12 may be backoff information issued by the received radio access network device in real time, or backoff information preconfigured for the user equipment, which is not limited in the embodiment of the present invention.
The back-off module 13 is configured to stop sending data on the unauthorized frequency band within the back-off duration according to the back-off information acquired by the acquisition module 12.
By implementing the embodiment of the invention, the uplink data can be sent to the wireless access network equipment through the unauthorized frequency band, and the user equipment stops sending the data on the unauthorized frequency band within the backoff duration corresponding to the backoff information when the backoff information is obtained, so that the purpose of effectively using the unauthorized frequency band to transmit the uplink data is realized.
Further, please refer to fig. 6, which is a schematic structural diagram of another ue according to an embodiment of the present invention, where the ue according to the embodiment of the present invention includes the sending module 11, the obtaining module 12, and the backoff module 13 in the ue, and optionally, in some embodiments of the present invention, the obtaining module 12 may be specifically configured to:
receiving backoff information sent by the radio access network equipment, wherein the backoff information is sent after the radio access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value, or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
Optionally, in some embodiments of the present invention, the obtaining module 12 may further specifically be configured to:
determining the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
Optionally, in some embodiments of the present invention, the user equipment may further include:
and the synchronization module 14 is configured to send a preamble sequence to the radio access network device using the unlicensed frequency band when uplink synchronization is not achieved.
Optionally, in some embodiments of the present invention, the user equipment may further include:
an occupation module 15, configured to, when it is determined that the unlicensed frequency band is in an idle state in the subframe n-1, occupy the unlicensed frequency band by sending occupation information until an end time of the subframe n-1, where the occupation information at least includes a preset occupation symbol.
Further, the occupancy information further includes a data scheduling request, and the user equipment further includes:
a first receiving module 16, configured to receive data scheduling information issued by the radio access network device according to the data scheduling request, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
the sending module 11 is specifically configured to:
and sending uplink data to the wireless access network equipment by using an unlicensed frequency band based on the data scheduling information.
Optionally, in some embodiments of the present invention, the unlicensed frequency band is divided into a preset number of frequency band intervals; the user equipment may further include:
a preemption module 17, configured to preempt an unlicensed frequency band resource in a target frequency band interval of the unlicensed frequency band, where the user equipment is a user equipment configured with a preset network identifier, and the network identifier is associated with the target frequency band interval;
the sending module 11 may specifically be configured to:
and sending uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
Optionally, in some embodiments of the present invention, the user equipment may further include:
a second receiving module 18, configured to receive feedback information sent by the radio access network device in response to the uplink data, and detect whether the uplink data needs to be sent again according to the feedback information, where the feedback information includes acknowledgement feedback information ACK used to indicate that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK used to indicate that the radio access network device does not receive the uplink data.
Specifically, the second receiving module 18 may further include:
a detecting unit 181, configured to detect, within a set time window after the uplink data is sent, whether feedback information sent by the radio access network device in response to the uplink data is received in an unlicensed frequency band, where the time window is notified by the radio access network device through a broadcast message or a radio resource control protocol RRC signaling or is a preset fixed value;
a confirming unit 182, configured to directly determine the feedback information as an acknowledgement feedback information ACK when the feedback information is not received in the unlicensed frequency band; or the like, or, alternatively,
an information receiving unit 183, configured to receive the feedback information on the authorized frequency band according to a preconfigured feedback position offset when the feedback information is not received on the unauthorized frequency band.
Optionally, in some embodiments of the present invention, the user equipment further includes:
a configuration module 19, configured to configure a sequence number for uplink data that needs to be sent, so that the radio access network device obtains sending status information corresponding to the uplink data according to the sequence number when receiving the uplink data, where the sending status information includes a sending time and/or a data size of the uplink data.
The embodiments of the present invention and the first method embodiment belong to the same concept, and the technical effects thereof are also the same, and specific reference is made to the description of the first method embodiment, which is not repeated herein.
By implementing the embodiment of the invention, the UE can perform channel interception based on the unlicensed spectrum resource information issued by the eNB, seize the unlicensed frequency band when intercepting the idle unlicensed frequency band, and send uplink data to the eNB through the unlicensed frequency band after the UE achieves uplink synchronization.
Referring to fig. 7, a schematic structural diagram of a radio access network device according to an embodiment of the present invention is shown, and specifically, the radio access network device according to the embodiment of the present invention includes: a data receiving module 21, a detecting module 22 and a first generating module 23. Wherein the content of the first and second substances,
the data receiving module 21 is configured to receive uplink data sent by a user equipment using an unlicensed frequency band;
the detecting module 22 is configured to detect whether a data amount of uplink data sent by the user equipment exceeds a preset data amount threshold, or detect whether a time length of the uplink data sent by the user equipment exceeds a preset time threshold;
the first generating module 23 is configured to generate backoff information when the detection result of the detecting module 22 is that the backoff time exceeds a threshold, and notify the user equipment of a backoff duration corresponding to the backoff information through a broadcast message or a unicast message, so that the user equipment stops sending data on the unlicensed frequency band within the backoff duration according to the backoff information.
The wireless access network equipment can receive the uplink data sent by the user equipment through the unauthorized frequency band, and when detecting that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value or the time length of the sent uplink data exceeds a preset time threshold value, generates the backoff information, and sends the backoff information to the user equipment, so that the user equipment stops sending data on the unauthorized frequency band within a certain backoff duration.
Further, please refer to fig. 8, which is a schematic structural diagram of another radio access network device according to an embodiment of the present invention, where the user equipment according to the embodiment of the present invention includes the data receiving module 21, the detecting module 22, and the first generating module 23 in the radio access network device, and optionally, in the embodiment of the present invention, the radio access network device may further include:
a sequence receiving module 24, configured to receive a preamble sequence sent by the user equipment using the unlicensed frequency band;
a calculating module 25, configured to calculate a time advance according to the preamble sequence, and send the time advance to the user equipment, so that the user equipment adjusts its sending time according to the time advance to achieve uplink synchronization.
Optionally, in some embodiments of the present invention, the radio access network device may further include:
an information configuration module 26, configured to configure, when receiving a data scheduling request sent by the user equipment, data scheduling information for the user equipment according to the data scheduling request, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
a first sending module 27, configured to send the data scheduling information to the user equipment, so that the user equipment sends uplink data to the radio access network device by using an unlicensed frequency band based on the data scheduling information.
Optionally, in some embodiments of the present invention, the radio access network device further includes:
a dividing module 28, configured to divide an unlicensed frequency band into a preset number of frequency band intervals, and configure a network identifier for a user equipment, so that the user equipment occupies an unlicensed frequency band resource in a target frequency band interval of the unlicensed frequency band, where the network identifier is associated with the target frequency band interval;
the data receiving module 21 may specifically be configured to:
and receiving uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
Optionally, in some embodiments of the present invention, the radio access network device further includes:
a second generating module 29, configured to decode the uplink data, and generate feedback information according to a decoding result, where the feedback information includes acknowledgement feedback information ACK that indicates that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK that indicates that the radio access network device does not receive the uplink data;
a second sending module 30, configured to send the feedback information to the user equipment.
Specifically, the second sending module 30 may further include:
a frequency band detection unit 301, configured to detect whether there is an idle unlicensed frequency band within a preset time window;
a first information sending unit 302, configured to send the feedback information to the user equipment by using an idle unlicensed frequency band when the idle unlicensed frequency band exists;
a second information sending unit 303, configured to send the feedback information to the user equipment using an authorized frequency band or not sending the feedback information to the user equipment when there is no idle unlicensed frequency band.
By implementing the embodiment of the invention, the wireless access network equipment can receive the uplink data sent by the user equipment through the unauthorized frequency band, and when the back-off information is generated when the data volume of the uplink data sent by the user equipment is detected to exceed the preset data volume threshold value or the time length of the uplink data sent by the user equipment is detected to exceed the preset time threshold value, the user equipment stops sending the data on the unauthorized frequency band within the back-off duration corresponding to the back-off information, so that the purpose of effectively using the unauthorized frequency band to transmit the uplink data is realized.
Further, please refer to fig. 9, which is a schematic structural diagram of another ue according to an embodiment of the present invention, where the ue according to the embodiment of the present invention includes: a receiver 300, a transmitter 400, a memory 200 and a processor 100, wherein the memory 200 may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 200, which is a kind of computer storage medium, stores therein a corresponding application program and the like. The receiver 300, the transmitter 400, the memory 200 and the processor 100 may be connected by a bus, or may be connected by other methods. In this embodiment, a bus connection is described. Specifically, the ue according to the embodiment of the present invention may further refer to the related descriptions of the ue in the corresponding embodiments of fig. 5 to 6.
Wherein the processor 100 performs the following steps:
transmitting uplink data to the radio access network device by using the unlicensed frequency band through the receiver 300;
obtaining backoff information, wherein the backoff information is used for indicating the user equipment to stop sending data on the unauthorized frequency band within a backoff duration;
and stopping sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
Optionally, when executing the obtaining of the backoff information, the processor 100 specifically executes the following steps:
receiving backoff information sent by the radio access network equipment, wherein the backoff information is sent after the radio access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value, or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
Optionally, when executing the obtaining of the backoff information, the processor 100 specifically executes the following steps:
determining the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
Optionally, before executing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, the processor 100 further executes the following steps:
and if the uplink synchronization is not achieved, sending a preamble sequence to the wireless access network equipment by using the unauthorized frequency band.
Optionally, before executing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, the processor 100 further executes the following steps:
and if the unauthorized frequency band is determined to be in an idle state in the subframe n-1, occupying the unauthorized frequency band by sending occupied information until the ending time of the subframe n-1, wherein the occupied information at least comprises preset occupied symbols.
Optionally, the occupancy information further includes a data scheduling request, and the processor 100 further performs the following steps:
receiving data scheduling information issued by the wireless access network equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and redundancy version used for data transmission;
the processor 100, when executing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, specifically executes the following steps:
and sending uplink data to the wireless access network equipment by using an unlicensed frequency band based on the data scheduling information.
Optionally, the unlicensed frequency band is divided into a preset number of frequency band intervals; the processor 100 further performs the steps of:
seizing an unauthorized frequency band resource on a target frequency band interval of the unauthorized frequency band, wherein the user equipment is configured with a preset network identifier, and the network identifier is associated with the target frequency band interval;
the processor 100, when executing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, specifically executes the following steps:
and sending uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
Optionally, after executing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, the processor 100 further executes the following steps:
and receiving feedback information issued by the wireless access network equipment in response to the uplink data, and detecting whether the uplink data needs to be retransmitted according to the feedback information, wherein the feedback information comprises acknowledgement feedback information ACK for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK for indicating that the wireless access network equipment does not receive the uplink data.
Optionally, the processor 100, when executing the receiving of the feedback information sent by the radio access network device in response to the uplink data, specifically executes the following steps:
detecting whether feedback information sent by the radio access network equipment in response to the uplink data is received in an unauthorized frequency band within a set time window after the uplink data is sent, wherein the time window is notified by the radio access network equipment through a broadcast message or a radio resource control protocol (RRC) signaling or is a preset fixed value;
if the feedback information is not received on the unauthorized frequency band, directly determining the feedback information as Acknowledgement (ACK) feedback information; or, if the feedback information is not received in the unlicensed frequency band, receiving the feedback information in the licensed frequency band according to a preset feedback position offset.
Optionally, before performing the sending of the uplink data to the radio access network device by using the unlicensed frequency band, the processor 100 further performs the following steps:
configuring a sequence number for uplink data to be transmitted, so that the wireless access network device obtains transmission state information corresponding to the uplink data according to the sequence number when receiving the uplink data, wherein the transmission state information includes transmission time and/or data size of the uplink data.
By implementing the embodiment of the invention, the uplink data can be sent to the wireless access network equipment through the unauthorized frequency band, and the data is stopped to be sent on the unauthorized frequency band within the backoff duration corresponding to the backoff information when the backoff information is obtained, so that the uplink data can be effectively transmitted by using the unauthorized frequency band.
Further, please refer to fig. 10, which is a schematic structural diagram of another radio access network device according to an embodiment of the present invention, where the radio access network device according to the embodiment of the present invention includes: a receiver 700, a transmitter 800, a memory 600 and a processor 500, wherein the memory 600 may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 600, which is a kind of computer storage medium, stores therein a corresponding application program and the like. The receiver 700, the transmitter 800, the memory 600 and the processor 500 may be connected by a bus, or may be connected by other methods. In this embodiment, a bus connection is described. Specifically, the radio access network device according to the embodiment of the present invention may further refer to the related descriptions of the radio access network device in the corresponding embodiments of fig. 7 to fig. 8.
Wherein the processor 500 performs the following steps:
receiving, by a receiver 700, uplink data transmitted by a user equipment using an unlicensed frequency band;
detecting whether the data volume of uplink data sent by the user equipment exceeds a preset data volume threshold value or not; or, detecting whether the time length of uplink data sent by the user equipment exceeds a preset time threshold;
and if so, the wireless access network equipment generates backoff information and informs the user equipment of backoff duration corresponding to the backoff information through a broadcast message or a unicast message, so that the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
Optionally, before executing the receiving of the uplink data sent by the user equipment using the unlicensed frequency band, the processor 500 further executes the following steps:
receiving a preamble sequence transmitted by a user equipment using an unlicensed frequency band through a receiver 700;
and calculating a time lead according to the preamble sequence, and transmitting the time lead to the user equipment through a transmitter 800, so that the user equipment adjusts the transmission time thereof according to the time lead to achieve uplink synchronization.
Optionally, before executing the receiving of the uplink data sent by the user equipment using the unlicensed frequency band, the processor 500 further executes the following steps:
if a data scheduling request sent by the user equipment is received, configuring data scheduling information for the user equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and redundancy versions used for data transmission;
transmitting the data scheduling information to the user equipment through a transmitter 800, so that the user equipment uses an unlicensed frequency band to transmit uplink data to the radio access network device based on the data scheduling information.
Optionally, before executing the receiving of the uplink data sent by the user equipment using the unlicensed frequency band, the processor 500 further executes the following steps:
dividing an unauthorized frequency band into a preset number of frequency band intervals, and configuring a network identifier for user equipment to enable the user equipment to seize unauthorized frequency band resources on a target frequency band interval of the unauthorized frequency band, wherein the network identifier is associated with the target frequency band interval;
the processor 500 specifically performs the following steps when executing the receiving of the uplink data sent by the user equipment using the unlicensed frequency band:
and receiving uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
Optionally, after the processor 500 executes the uplink data sent by the user equipment using the unlicensed frequency band, the following further steps are executed:
decoding the uplink data, and generating feedback information according to a decoding result, wherein the feedback information includes acknowledgement feedback information ACK for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK for indicating that the wireless access network equipment does not receive the uplink data;
the feedback information is sent to the user equipment by the transmitter 800.
Optionally, the processor 500 specifically performs the following steps when executing the sending of the feedback information to the user equipment:
detecting whether an idle unauthorized frequency band exists in a preset time window;
if an idle unauthorized frequency band exists, the idle unauthorized frequency band is used for sending the feedback information to the user equipment;
and if the idle unauthorized frequency band does not exist, transmitting the feedback information to the user equipment by using the authorized frequency band, or not transmitting the feedback information to the user equipment.
By implementing the embodiment of the invention, the wireless access network equipment can receive the uplink data sent by the user equipment through the unauthorized frequency band, and when the back-off information is generated when the data volume of the uplink data sent by the user equipment is detected to exceed the preset data volume threshold value or the time length of the uplink data sent by the user equipment is detected to exceed the preset time threshold value, the user equipment stops sending the data on the unauthorized frequency band within the back-off duration corresponding to the back-off information, so that the purpose of effectively using the unauthorized frequency band to transmit the uplink data is realized. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (32)

  1. A method for transmitting uplink data, comprising:
    the user equipment sends uplink data to the wireless access network equipment by using the unlicensed frequency band;
    the user equipment acquires backoff information, wherein the backoff information is used for indicating the user equipment to stop sending data on the unauthorized frequency band within backoff duration;
    and the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
  2. The method of claim 1, wherein the user equipment obtaining backoff information comprises:
    the user equipment receives backoff information sent by the wireless access network equipment, wherein the backoff information is sent after the wireless access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
    the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
  3. The method of claim 1, wherein the user equipment obtaining backoff information comprises:
    the user equipment determines the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
    wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
  4. The method according to any one of claims 1 to 3, wherein before the user equipment transmits uplink data to the radio access network device using the unlicensed frequency band, the method further comprises:
    and if the user equipment does not reach uplink synchronization, the user equipment sends a preamble sequence to the wireless access network equipment by using an unauthorized frequency band.
  5. The method according to any one of claims 1 to 4, wherein before the user equipment transmits uplink data to the radio access network device using the unlicensed frequency band, the method further comprises:
    if the user equipment determines that the unauthorized frequency band is in an idle state in the subframe n-1, the user equipment occupies the unauthorized frequency band by sending occupied information until the ending time of the subframe n-1, wherein the occupied information at least comprises preset occupied symbols.
  6. The method of claim 5, wherein the occupancy information further comprises a data scheduling request, the method further comprising:
    the user equipment receives data scheduling information issued by the wireless access network equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and redundancy versions used for data transmission;
    the method for the user equipment to send uplink data to the radio access network equipment by using the unlicensed frequency band comprises the following steps:
    and the user equipment uses an unauthorized frequency band to send uplink data to the wireless access network equipment based on the data scheduling information.
  7. The method according to any one of claims 1 to 6, wherein the unlicensed frequency band is divided into a preset number of frequency band intervals; the method further comprises the following steps:
    the user equipment seizes the non-authorized frequency band resource on a target frequency band interval of the non-authorized frequency band, the user equipment is configured with a preset network identification, and the network identification is associated with the target frequency band interval;
    the method for the user equipment to send uplink data to the radio access network equipment by using the unlicensed frequency band comprises the following steps:
    and the user equipment transmits uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
  8. The method according to any one of claims 1 to 7, wherein after the user equipment transmits uplink data to a radio access network device using an unlicensed frequency band, the method further comprises:
    and the user equipment receives feedback information issued by the wireless access network equipment in response to the uplink data, and detects whether the uplink data needs to be retransmitted according to the feedback information, wherein the feedback information comprises acknowledgement feedback information ACK for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK for indicating that the wireless access network equipment does not receive the uplink data.
  9. The method of claim 8, wherein the step of the user equipment receiving the feedback information issued by the radio access network equipment in response to the uplink data comprises:
    the user equipment detects whether feedback information sent by the radio access network equipment in response to the uplink data is received in an unauthorized frequency band within a set time window after the user equipment sends the uplink data, wherein the time window is notified by the radio access network equipment through a broadcast message or a radio resource control protocol (RRC) signaling or is a preset fixed value;
    if the user equipment does not receive the feedback information on the unauthorized frequency band, the user equipment directly determines the feedback information as Acknowledgement (ACK) feedback information; or, if the user equipment does not receive the feedback information on the unauthorized frequency band, the user equipment receives the feedback information on the authorized frequency band according to the preset feedback position offset.
  10. The method according to any one of claims 1 to 9, wherein before the user equipment transmits uplink data to a radio access network device using the unlicensed frequency band, the method further comprises:
    the user equipment configures a serial number for uplink data to be sent, so that the radio access network equipment obtains sending state information corresponding to the uplink data according to the serial number when receiving the uplink data, wherein the sending state information comprises the sending time and/or the data size of the uplink data.
  11. A method for transmitting uplink data, comprising:
    the method comprises the steps that the wireless access network equipment receives uplink data sent by user equipment by using an unauthorized frequency band;
    the wireless access network equipment detects whether the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value; or, the radio access network device detects whether the time length of the uplink data sent by the user equipment exceeds a preset time threshold;
    and if so, the wireless access network equipment generates backoff information and informs the user equipment of backoff duration corresponding to the backoff information through a broadcast message or a unicast message, so that the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
  12. The method of claim 11, wherein before the radio access network device receives uplink data transmitted by a user equipment using an unlicensed frequency band, the method further comprises:
    the wireless access network equipment receives a preamble sequence sent by user equipment by using an unauthorized frequency band;
    and the wireless access network equipment calculates the time lead according to the preamble sequence and sends the time lead to the user equipment, so that the user equipment adjusts the sending time of the user equipment according to the time lead to achieve uplink synchronization.
  13. The method according to claim 11 or 12, wherein before the radio access network device receives uplink data transmitted by the user equipment using the unlicensed frequency band, the method further comprises:
    if a data scheduling request sent by the user equipment is received, the wireless access network equipment configures data scheduling information for the user equipment according to the data scheduling request, wherein the data scheduling information comprises any one or more of a modulation coding mode, physical resources and a redundancy version used for data transmission;
    and the wireless access network equipment sends the data scheduling information to the user equipment so that the user equipment uses an unlicensed frequency band to send uplink data to the wireless access network equipment based on the data scheduling information.
  14. The method according to any one of claims 11 to 13, wherein before the radio access network device receives uplink data transmitted by a user equipment using an unlicensed frequency band, the method further comprises:
    the wireless access network equipment divides an unauthorized frequency band into a preset number of frequency band intervals, and configures a network identifier for user equipment so that the user equipment occupies unauthorized frequency band resources on a target frequency band interval of the unauthorized frequency band, wherein the network identifier is associated with the target frequency band interval;
    the method for receiving the uplink data sent by the user equipment by using the unlicensed frequency band by the radio access network equipment comprises the following steps:
    and the wireless access network equipment receives the uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
  15. The method according to any one of claims 11 to 14, wherein after the radio access network device receives uplink data transmitted by a user equipment using an unlicensed frequency band, the method further comprises:
    the wireless access network equipment decodes the uplink data and generates feedback information according to a decoding result, wherein the feedback information comprises acknowledgement feedback information ACK which is used for indicating that the wireless access network equipment receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK which indicates that the wireless access network equipment does not receive the uplink data;
    and the wireless access network equipment sends the feedback information to the user equipment.
  16. The method of claim 15, wherein the radio access network device sends the feedback information to the user equipment, and wherein the sending comprises:
    the wireless access network equipment detects whether an idle unauthorized frequency band exists in a preset time window;
    if an idle unauthorized frequency band exists, the wireless access network equipment uses the idle unauthorized frequency band to send the feedback information to the user equipment;
    and if the idle unauthorized frequency band does not exist, the wireless access network equipment uses the authorized frequency band to send the feedback information to the user equipment, or does not send the feedback information to the user equipment.
  17. A user device, comprising:
    a sending module, configured to send uplink data to the radio access network device using an unlicensed frequency band;
    an obtaining module, configured to obtain backoff information, where the backoff information is used to instruct a user equipment to stop sending data in the unlicensed frequency band within a backoff duration;
    and the backoff module is used for stopping sending data on the unauthorized frequency band within the backoff duration according to the backoff information acquired by the acquisition module.
  18. The device of claim 17, wherein the obtaining module is specifically configured to:
    receiving backoff information sent by the radio access network equipment, wherein the backoff information is sent after the radio access network equipment detects that the data volume of the uplink data sent by the user equipment exceeds a preset data volume threshold value, or detects that the time length of the uplink data sent by the user equipment exceeds a preset time threshold value;
    the backoff duration is notified to the user equipment by the radio access network equipment through a broadcast message or a unicast message, or is preset by the user equipment.
  19. The device of claim 17, wherein the obtaining module is specifically configured to:
    determining the backoff information after detecting that the data volume for sending the uplink data exceeds a data volume threshold or detecting that the time length for sending the uplink data exceeds a time threshold;
    wherein at least one of the data volume threshold, the time threshold, and the backoff duration is notified to the user equipment by the radio access network device through a broadcast message or a unicast message, or is preset by the user equipment.
  20. The apparatus according to any one of claims 17 to 19, wherein the user equipment further comprises:
    and the synchronization module is used for sending a preamble sequence to the wireless access network equipment by using the unauthorized frequency band when uplink synchronization is not achieved.
  21. The apparatus according to any one of claims 17 to 20, wherein the user equipment further comprises:
    and the occupation module is used for occupying the unauthorized frequency band by sending occupation information until the ending time of the subframe n-1 when the unauthorized frequency band is determined to be in an idle state in the subframe n-1, wherein the occupation information at least comprises preset occupation symbols.
  22. The apparatus of claim 21, wherein the occupancy information further comprises a data scheduling request, and wherein the user equipment further comprises:
    a first receiving module, configured to receive data scheduling information issued by the radio access network device according to the data scheduling request, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
    the sending module is specifically configured to:
    and sending uplink data to the wireless access network equipment by using an unlicensed frequency band based on the data scheduling information.
  23. The device according to any one of claims 17 to 22, wherein the unlicensed frequency band is divided into a preset number of frequency band intervals; the user equipment further comprises:
    a preemption module, configured to preempt an unlicensed frequency band resource in a target frequency band interval of the unlicensed frequency band, where the user equipment is a user equipment configured with a preset network identifier, and the network identifier is associated with the target frequency band interval;
    the sending module is specifically configured to:
    and sending uplink data to the wireless access network equipment by using the target frequency band interval of the unlicensed frequency band.
  24. The apparatus according to any one of claims 17 to 23, wherein the user equipment further comprises:
    a second receiving module, configured to receive feedback information sent by the radio access network device in response to the uplink data, and detect whether the uplink data needs to be resent according to the feedback information, where the feedback information includes acknowledgement feedback information ACK used to indicate that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK used to indicate that the radio access network device does not receive the uplink data.
  25. The apparatus of claim 24, wherein the second receiving module comprises:
    a detecting unit, configured to detect whether feedback information sent by the radio access network device in response to the uplink data is received in an unlicensed frequency band within a set time window after the uplink data is sent, where the time window is notified by the radio access network device through a broadcast message or radio resource control protocol RRC signaling or is a preset fixed value;
    a confirming unit, configured to directly determine the feedback information as an acknowledgement feedback information ACK when the feedback information is not received in the unlicensed frequency band; or the like, or, alternatively,
    and the information receiving unit is used for receiving the feedback information on the authorized frequency band according to the preset feedback position offset when the feedback information is not received on the unauthorized frequency band.
  26. The apparatus according to any one of claims 17 to 25, wherein the user equipment further comprises:
    a configuration module, configured to configure a sequence number for uplink data to be sent, so that the radio access network device obtains sending status information corresponding to the uplink data according to the sequence number when receiving the uplink data, where the sending status information includes a sending time and/or a data size of the uplink data.
  27. A radio access network device, comprising:
    the data receiving module is used for receiving uplink data sent by user equipment by using an unauthorized frequency band;
    a detection module, configured to detect whether a data amount of uplink data sent by the user equipment exceeds a preset data amount threshold, or detect whether a time length of the uplink data sent by the user equipment exceeds a preset time threshold;
    and the first generation module is used for generating backoff information when the detection result of the detection module is over, and notifying the backoff duration corresponding to the backoff information to the user equipment through a broadcast message or a unicast message, so that the user equipment stops sending data on the unauthorized frequency band within the backoff duration according to the backoff information.
  28. The apparatus of claim 27, wherein the radio access network device further comprises:
    a sequence receiving module, configured to receive a preamble sequence sent by a user equipment using an unlicensed frequency band;
    and the calculating module is used for calculating the time lead according to the preamble sequence and sending the time lead to the user equipment so that the user equipment adjusts the sending time of the user equipment according to the time lead to achieve uplink synchronization.
  29. The apparatus according to claim 27 or 28, wherein the radio access network apparatus further comprises:
    an information configuration module, configured to configure data scheduling information for the user equipment according to a data scheduling request sent by the user equipment when the data scheduling request is received, where the data scheduling information includes any one or more of a modulation and coding scheme, a physical resource, and a redundancy version used for data transmission;
    a first sending module, configured to send the data scheduling information to the user equipment, so that the user equipment sends uplink data to the radio access network device using an unlicensed frequency band based on the data scheduling information.
  30. The apparatus according to any of claims 27 to 29, wherein the radio access network apparatus further comprises:
    the device comprises a dividing module, a judging module and a judging module, wherein the dividing module is used for dividing an unauthorized frequency band into a preset number of frequency band intervals and configuring a network identifier for user equipment so that the user equipment can seize resources of the unauthorized frequency band on a target frequency band interval of the unauthorized frequency band, and the network identifier is associated with the target frequency band interval;
    the data receiving module is specifically configured to:
    and receiving uplink data sent by the user equipment by using the target frequency band interval of the unlicensed frequency band.
  31. The apparatus according to any of claims 27 to 30, wherein the radio access network apparatus further comprises:
    a second generating module, configured to decode the uplink data, and generate feedback information according to a decoding result, where the feedback information includes acknowledgement feedback information ACK indicating that the radio access network device receives the uplink data sent by the user equipment or non-acknowledgement feedback information NACK indicating that the radio access network device does not receive the uplink data;
    and the second sending module is used for sending the feedback information to the user equipment.
  32. The apparatus of claim 31, wherein the second sending module comprises:
    the frequency band detection unit is used for detecting whether an idle unauthorized frequency band exists in a preset time window;
    a first information sending unit, configured to send the feedback information to the user equipment by using an idle unlicensed frequency band when the idle unlicensed frequency band exists;
    a second information sending unit, configured to send the feedback information to the user equipment using an authorized frequency band or not sending the feedback information to the user equipment when there is no idle unlicensed frequency band.
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