WO2018045846A1 - 一种上行lbt信道检测和上行数据发送方法、设备 - Google Patents

一种上行lbt信道检测和上行数据发送方法、设备 Download PDF

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Publication number
WO2018045846A1
WO2018045846A1 PCT/CN2017/095293 CN2017095293W WO2018045846A1 WO 2018045846 A1 WO2018045846 A1 WO 2018045846A1 CN 2017095293 W CN2017095293 W CN 2017095293W WO 2018045846 A1 WO2018045846 A1 WO 2018045846A1
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Prior art keywords
user equipment
lbt
channel
contention window
uplink scheduling
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PCT/CN2017/095293
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English (en)
French (fr)
Inventor
贾琼
向铮铮
罗俊
范巍巍
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17848019.0A priority Critical patent/EP3503653B1/en
Priority to KR1020197009711A priority patent/KR102196080B1/ko
Publication of WO2018045846A1 publication Critical patent/WO2018045846A1/zh
Priority to US16/294,895 priority patent/US11252757B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present invention relates to communication technologies, and in particular, to a method and device for transmitting and detecting uplink (Listing Before Talk, LBT) channel detection and uplink data based on a self-contained frame structure.
  • uplink Listing Before Talk, LBT
  • the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) access technology is adopted.
  • the node needs to send data before sending data.
  • a Clear Channel Assessment (CCA) is performed to determine whether the channel is occupied.
  • CCA Clear Channel Assessment
  • a random backoff mechanism is also introduced. Each node selects a random backoff number according to its corresponding contention window (CW), and detects the channel idle time in the time slot. When the corresponding backoff number is decremented, the channel can be accessed only after the random backoff is completed, as shown in FIG.
  • CW contention window
  • LAA License Assisted Access
  • LAA technology supports parallel transmission and reception on multiple carriers, in which the licensed frequency band is used as the primary carrier and the unlicensed frequency band is used as the auxiliary subcarrier.
  • 3GPP deploys the unlicensed frequency band in the LAA at 5 GHz (only supports downlink transmission), and ensures that Long Term Evolution (LTE) can be compared with existing access technologies on a fair and friendly basis (such as WiFi) Coexistence, devices operating in unlicensed bands need to follow LBT principles to avoid collisions.
  • LTE Long Term Evolution
  • Type 1 (Cat 1): CCA detection is not performed before data is sent;
  • Cat 2 LBT mechanism that does not do random backoff
  • Cat 3 a random back-off LBT mechanism with a fixed window of competition
  • Release 13 adopts a Cat 4 type LBT mechanism for downlink channel access, that is, the eNB first needs to ensure that the channel is idle within a delay time Td, and then starts random backoff, and when the backoff is over, Enter the channel and obtain the corresponding Maximum Channel Occupy Time (MCOT).
  • Td delay time
  • MCOT Maximum Channel Occupy Time
  • the LTE system supports two frame structures, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the uplink and downlink transmissions have independent subframes.
  • the next-generation access technology requires high rate and low latency.
  • a TDD frame structure based on self-contained self-contained is proposed to support data.
  • ACK/NACK or Uplink Control Information (UCI)/Downlink Control Information (Downlink Control) Control information, such as DCI, is transmitted in the same sub-frame, and includes: a self-contained frame structure based on the following line (Down Link, DL for short), as shown in FIG. 2A; and an upper line (Up Link, UL for short)
  • the main self-contained frame structure is shown in Figure 2B.
  • the embodiments of the present invention provide an uplink LBT channel detection and uplink data transmission method and device, which solves the problem that the existing LBT mechanism is for the frame structure of the uplink and downlink independent transmission, and the LBT based on the self-contained frame structure.
  • Channel detection there is currently no feasible implementation.
  • an uplink LBT channel detection method includes:
  • the base station Before transmitting the uplink scheduling, the base station determines, according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe, a contention window required to execute the LBT;
  • the base station performs the LBT according to the contention window, and after detecting that the channel is idle, transmitting, by using the channel, the uplink scheduling corresponding to the user equipment in the self-contained subframe; or the base station detects the channel by using the LBT. After being idle, the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe by using the channel, where the uplink scheduling carries information of the contention window, so that the user equipment is according to the contention window. The information is executed by LBT.
  • the base station determines the contention window of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe, and includes the following three possible implementation manners:
  • the base station Determining, by the base station, the contention window according to a value of a highest service priority in a BSR of the user equipment, so that the channel can be quickly accessed;
  • the base station determines the competition of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe.
  • Window including:
  • the base station after the LBT detects that the channel is idle, sends the uplink scheduling corresponding to the user equipment in the self-contained subframe by using the channel, including:
  • the base station uses a type 2 LBT for channel detection
  • the base station After detecting that the channel is idle, the base station sends an uplink scheduling corresponding to the user equipment in the self-contained subframe by using the channel.
  • the method further includes:
  • the base station determines the MCOT; if the next self-contained subframe for uplink scheduling is located in the MCOT, the base station uses the type 2 LBT for channel detection before the next uplink scheduling; if the next uplink scheduling is performed.
  • the self-contained subframe is located outside the MCOT, and the base station performs channel detection by using the Type 4 LBT before the next uplink scheduling.
  • the uplink scheduling further includes indication information indicating a type of the LBT that the user equipment needs to perform.
  • the method further includes:
  • the base station transmits data or signals for occupying the channel in a guard interval GP of the self-contained subframe.
  • an uplink data sending method including:
  • the user equipment receives the uplink scheduling in the self-contained subframe.
  • the user equipment sends uplink data in the self-contained subframe according to the uplink scheduling.
  • the uplink scheduling carries the information of the contention window
  • the user equipment determines, according to the uplink scheduling, the LBT that is performed by the user equipment, including:
  • the user equipment performs channel detection by using the type 4 LBT according to the information of the contention window.
  • the uplink scheduling carries the indication information for indicating the type of the LBT that the user equipment needs to perform, and the user equipment determines, according to the uplink scheduling, the LBT that is executed by the user equipment, including:
  • the user equipment determines, according to the indication information, an LBT type that is executed by itself, and executes a corresponding type of LBT.
  • the uplink scheduling does not carry any parameters required by the LBT, and the user equipment determines, according to the uplink scheduling, the LBT that is performed by the user equipment, including:
  • the user equipment determines not to perform LBT; or
  • the user equipment determines, according to the service priority in the BSR, the contention window required to execute the LBT, and executes the LBT according to the contention window.
  • the user equipment determines, according to the service priority in the BSR, the contention window required to execute the LBT, including:
  • the user equipment determines the contention window according to the value of the service priority in the intermediate position according to the service priority in the BSR.
  • a computer readable storage medium having stored therein executable program code for implementing the method of the first aspect.
  • a computer readable storage medium wherein executable program code is stored, the program code for implementing the method of the second aspect.
  • a base station comprising means for performing the method of the first aspect.
  • a user equipment comprising means for performing the method of the second aspect.
  • a base station comprising: a processor, a transceiver, and a memory, wherein: the processor reads a program in the memory, and performs the method of the first aspect.
  • a user equipment comprising: a processor, a transceiver, and a memory, wherein: the processor reads a program in the memory, and performs the method of the second aspect.
  • the base station determines the contention window of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe before sending the uplink scheduling; after that, the base station may The competition window performs LBT for channel detection, thereby ensuring fairness between different access technologies and different user equipments, improving the probability of channel access, and avoiding frequent CCA detection by user equipment, and the base station can also After detecting that the channel is idle, the information of the contention window is sent to the scheduled user equipment by using the uplink scheduling, so that the user equipment performs LBT for channel detection according to the information of the contention window, thereby ensuring different access technologies and different access technologies. Fairness between user devices.
  • Figure 1 is a schematic diagram of a random backoff mechanism
  • 2A is a schematic diagram of a self-contained frame structure of the following behavior master
  • 2B is a schematic diagram of a self-contained frame structure of the above behavior master
  • FIG. 3 is a schematic diagram of a method for detecting an LBT channel according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an uplink data sending method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of executing LBT in Embodiment 1 of the present invention.
  • FIG. 6 is a schematic flowchart of Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of executing LBT in Embodiment 2 of the present invention.
  • FIG. 9A is a schematic diagram of performing LBT according to Embodiment 3 of the present invention.
  • FIG. 9B is a schematic diagram of another implementation of an LBT according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic diagram of another user equipment according to an embodiment of the present invention.
  • an LBT channel detection method is provided, and the detection method includes:
  • the base station Before transmitting the uplink scheduling, the base station determines, according to the service priority in the Buffer Status Report (BSR) of the user equipment scheduled in the self-contained subframe, the contention window of the LBT;
  • BSR Buffer Status Report
  • the base station performs an LBT according to the contention window, and after detecting that the channel is idle, transmitting, by using the channel, an uplink scheduling corresponding to the user equipment in the self-contained subframe; or the base station adopts an LBT detection.
  • the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe by using the channel, where the uplink scheduling carries the information of the contention window, so that the user equipment is configured according to the The information of the competition window performs LBT.
  • the information of the contention window may be the contention window (CW), even if it is a specific value of the contention window, or may be an initial value of the backoff number determined based on the contention window, that is, the base station is from 0. ⁇ CW randomly selects an initial value of the number of backoffs of the LBT determined to be type 4.
  • the user equipment determines an initial value of the backoff number determined by the contention window, that is, the user equipment randomly selects a number from 0 to CW. For the initial value of the backoff number of the LBT of type 4, random backoff is started; in this mode, the initial values of the number of backoffs selected by different user equipments may be different;
  • the user equipment directly starts the random backoff by using the initial value of the backoff number; in this manner, the initial values of the backoff numbers selected by different user equipments are the same.
  • the base station before transmitting the uplink scheduling, determines the contention window of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe; after that, the base station may perform the LBT according to the contention window.
  • Channel detection ensures the fairness between different access technologies and different user equipments, improves the probability of channel access, and avoids frequent CCA detection by user equipment.
  • the base station can also detect the channel idle.
  • the information of the contention window is sent to the scheduled user equipment by using an uplink scheduling, so that the user equipment performs LBT for channel detection according to the information of the contention window, thereby ensuring between different access technologies and between different user equipments. Fairness.
  • the base station performs an LBT according to the contention window, that is, the base station randomly selects a number from 0 to CW to determine an initial value of the backoff number, and according to the The initial value of the backoff number is performed by the LBT of type 4, and channel detection is performed.
  • the method further includes:
  • the base station determines a Maximum Channel Occupy Time (MCOT); if the next self-contained subframe for uplink scheduling is located in the MCOT, the base station adopts Type 2 LBT before the next uplink scheduling. And performing channel detection; if the next self-contained subframe for performing uplink scheduling is located outside the MCOT, the base station performs channel detection by using the type 4 LBT before the next uplink scheduling.
  • MCOT Maximum Channel Occupy Time
  • the base station uses the type 2 LBT to perform channel detection, and after detecting that the channel is idle, passes the channel in the self-contained subframe. Sending an uplink scheduling corresponding to the user equipment, and carrying the information of the contention window in the uplink scheduling, so that the user equipment can perform LBT according to the information of the contention window to perform channel detection.
  • the uplink scheduling sent by the base station in S32 further carries indication information indicating a type of the LBT that the user equipment needs to perform, so that the user equipment can know which one needs to be executed. Types of LBT.
  • the types of LBT include:
  • Cat 1LBT that is, the user equipment does not need to perform CCA detection before transmitting uplink data
  • Cat 2LBT that is, the user equipment needs to perform CCA detection of a set duration before transmitting uplink data, for example, performing CCA detection of 25 ⁇ s;
  • Cat 3LBT that is, the user equipment needs to perform a random back-off LBT with a competitive window fixed before transmitting uplink data
  • the Cat 4LBT that is, the user equipment needs to perform a random backoff type LBT with a variable contention window before transmitting uplink data.
  • the base station in S32 performs an LBT according to the contention window, and the indication information indicates that the user equipment performs an LBT of type 1, the base station passes the channel in the self- After the uplink scheduling corresponding to the user equipment is sent in the subframe, the method further includes:
  • the base station sends data or signals for occupying the channel to occupy the channel in a guard interval (GP) of the self-contained subframe.
  • GP guard interval
  • the base station in S31 determines the contention window of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe, and includes the following three possible implementation manners:
  • the base station determines the contention window according to a value of a lowest service priority in a BSR of the user equipment.
  • the base station determines the contention window according to the value of the lowest service priority in the BSR of the user equipment, thereby being able to maximize The degree of guaranteeing the fairness between different access technologies and different user equipments; if the number of user equipments scheduled in the self-contained subframe is at least two, the base station first determines the lowest BSR of each user equipment.
  • the value of the service priority is determined according to the minimum value of the determined service priority values, so that the fairness between different access technologies and different user equipments can be ensured to the greatest extent.
  • the contention window may also be determined in other manners.
  • the base station first determines the lowest BSR of each user equipment.
  • the value of the service priority is determined according to the maximum value of the determined service priority values, thereby improving the connection between different access technologies and different user equipments.
  • the speed of the incoming channel for example, the base station first determines the value of the lowest service priority in the BSR of each user equipment, and then determines the contention window according to the intermediate value in the determined service priority value, thereby ensuring In the case of fairness between different access technologies and different user equipments, the speed of the access channel is taken into consideration; for example, the base station first determines the value of the lowest service priority in the BSR of each user equipment, and then according to The average value of the determined service priority values determines the contention window, thereby taking into account access while ensuring fairness between different access technologies and different user equipments Speed channel.
  • Manner 2 The base station determines the contention window according to a value of a highest service priority in a BSR of the user equipment.
  • the base station determines the contention window according to the value of the highest service priority in the BSR of the user equipment, thereby being able to quickly An access channel; if the number of user equipments scheduled in the self-contained subframe is at least two, the base station first determines a value of a highest service priority in a BSR of each user equipment, and then determines the service according to the determined service. The minimum value of the priority values determines the contention window, so that the fair access between different access technologies and different user equipments is taken into consideration while ensuring fast access channels.
  • the base station first determines a value of a highest service priority in a BSR of each user equipment, and then determines the contention window according to the maximum value of the determined service priority values. Therefore, the speed of the access channel is maximized. For example, the base station first determines the value of the highest service priority in the BSR of each user equipment, and then determines the value according to the intermediate value in the determined service priority value.
  • a competition window which ensures the fair access between different access technologies and different user equipments while ensuring a fast access channel; for example, the base station first determines the highest service priority in the BSR of each user equipment. The value is determined according to the average value of the determined service priority values, so that the fast access channel is ensured, and the fairness between different access technologies and different user equipments is taken into consideration.
  • Manner 3 The base station determines the contention window according to the value of the service priority in the intermediate position according to the service priority in the BSR of the user equipment.
  • the base station sorts the value of the service priority in the intermediate position according to the service priority in the BSR of the user equipment, and determines The contention window can be used to balance the fairness between different access technologies and different user equipments and the speed of accessing the channel; if the number of user equipments scheduled in the self-contained subframe is at least two, Determining, by the base station, a value of a service priority of the service priority ranking of each user equipment in the intermediate position, determining the contention window according to the minimum value of the determined service priority values, thereby taking into account different access technologies and In the case of fairness between different user equipments and the speed of the access channel, the speed of the access channel is increased.
  • the contention window may also be determined in other manners.
  • the base station first determines the service in the BSR of each user equipment. Prioritizing the value of the service priority in the middle position, determining the contention window according to the maximum value of the determined service priority values, thereby balancing fairness and connection between different access technologies and different user equipments In the case of the speed of the incoming channel, the fairness between different user equipments is ensured to a greater extent; for example, the base station first determines the value of the service priority of the service priority ranking of each user equipment in the BSR.
  • the determining, by the base station, the contention priority of the LBT according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe may be based on a preset service priority of the user equipment and the competition
  • the mapping relationship between the windows (CW) determines the contention window corresponding to the service priority in the BSR of the scheduled user equipment.
  • an uplink data sending method is provided.
  • the sending method includes:
  • the user equipment receives an uplink scheduling in a self-contained subframe.
  • the user equipment determines, according to the uplink scheduling, an LBT that is executed by itself.
  • the user equipment sends uplink data in the self-contained subframe according to the uplink scheduling.
  • the user equipment determines, according to the uplink scheduling, that a possible implementation manner of the LBT performed by the user equipment is:
  • the user equipment performs channel detection by using the LBT of type 4 according to the information of the contention window.
  • the user equipment needs to randomly select a number of LBTs that are determined to be type 4 from 0 to CW.
  • An initial value of the backoff number performing channel detection according to the determined initial value of the backoff number; if the uplink scheduling carries, determining based on the contention window
  • the initial value of the backoff number that is, the base station randomly selects a number from 0 to CW to determine the initial value of the backoff number of the type 4 LBT
  • the user equipment performs channel detection according to the initial value of the backoff number. .
  • the user equipment determines the LBT type that is executed by itself according to the indication information, and executes the LBT of the corresponding type.
  • the user equipment determines that the CCA detection does not need to be performed before sending the uplink data; if the indication information indicates that the user equipment performs type 2 LBT, the user equipment determines that CCA detection of a set duration is performed before transmitting uplink data, for example, performing CCA detection of 25 ⁇ s; if the indication information indicates that the user equipment performs LBT of type 3, the user equipment Determining that a contention window fixed random backoff type LBT needs to be performed before transmitting the uplink data; if the indication information indicates that the user equipment performs type 4 LBT, the user equipment determines that a contention window variable needs to be performed before transmitting uplink data. Random back-off LBT.
  • the user equipment adopts the type 4 LBT according to the information of the contention window. , performing channel detection;
  • the user equipment determines the contention window by itself, and adopts the type according to the determined contention window. 4 LBT for channel detection. Specifically, the user equipment randomly selects an initial value that is determined as the backoff number from 0 to CW, and performs type 4 LBT according to the initial value of the backoff number to perform channel detection.
  • the user equipment determines a contention window, and includes the following three possible implementation manners:
  • the user equipment determines a contention window according to the value of the lowest service priority in the BSR;
  • the user equipment determines a contention window according to the value of the highest service priority in the BSR;
  • the user equipment sorts the value of the service priority in the middle position according to the service priority in the BSR, and determines the contention window.
  • the embodiment of the present invention does not limit the foregoing three manners to determine a contention window, and may also adopt other manners.
  • the user equipment determines a contention window according to an average value of values of service priorities in its own BSR, and the like.
  • the embodiments of the present invention are not limited.
  • Another possible implementation manner of determining, by the user equipment in S42, the LBT performed by the user equipment according to the uplink scheduling is:
  • the user equipment determines that the LBT is not performed; or the user equipment determines that the type 2 LBT is used for channel detection; or the user equipment according to the BSR in the BSR
  • the service priority determines the competition window required to execute the LBT and executes the LBT according to the contention window.
  • the preferred manner is that the user equipment determines, according to the service priority in the BSR, the contention window required to execute the LBT, and according to the contention window. Execute LBT.
  • Embodiment 1 A single self-contained subframe scheduling scenario is described in this embodiment.
  • the base station uses the Cat 4LBT contention channel before transmitting the UL grant, that is, the base station first needs to detect that the channel is idle within one delay time Td, and then starts random backoff.
  • the backoff process is as follows:
  • the base station selects the corresponding contention window CW, and randomly selects a value between 0 and CW as the initial value of the random backoff. N0;
  • the base station determines whether Ni is greater than 0;
  • the base station performs CCA detection in the time slot Ts;
  • the base station performs CCA detection within an additional delay time Td;
  • the access channel sends a UL grant and obtains a corresponding Maximum Channel Occupy Time (MCOT).
  • MCOT Maximum Channel Occupy Time
  • the base station performs the Cat 2LBT before transmitting the UL grant; if it is outside the MCOT, the base station needs to re-competition the channel through the Cat 4LBT.
  • the scheduled user equipment after receiving the UL grant, the scheduled user equipment performs Cat 2LBT or directly sends data according to the indication of the UL grant, as shown in FIG. 5 .
  • the uplink scheduling carries indication information that indicates that the user equipment does not need to perform LBT before sending uplink data.
  • the scheduled user equipment after receiving the uplink scheduling, the scheduled user equipment does not perform LBT and directly sends uplink data.
  • the base station after the base station sends the uplink scheduling corresponding to the user equipment in the self-contained subframe by using the channel, the base station further includes:
  • the base station transmits data or signals for occupying the channel in the guard interval GP of the self-contained subframe to prevent the channel from being occupied.
  • the uplink scheduling includes indication information for indicating that the user equipment performs Type 2 LBT before transmitting uplink data, or the uplink scheduling does not include any used for Instructing the user equipment to perform the LBT indication information before transmitting the uplink data
  • the type 2 LBT is used for channel detection, and after determining that the channel is idle, The channel transmits uplink data in the self-contained subframe.
  • the scheduled user equipment after receiving the uplink scheduling, the scheduled user equipment performs CSI detection of 25 ⁇ s, and when the detection channel is idle, transmits uplink data in the self-contained subframe through the channel.
  • the specific process of this embodiment, as shown in FIG. 6, includes:
  • the eNB competes for the channel through the Cat 4LBT, and obtains the MCOT after successfully competing for the channel.
  • the eNB selects the contention window CW according to the service priority in the BSR of the UE scheduled in the subframe k, and randomly selects a number between 0 and CW as the initial value of the backoff number.
  • the eNB sends an uplink grant (UL grant) in the subframe k.
  • the base station sends a UL grant scheduling UE, and needs to perform Cat 2 before instructing the UE to send data in the UL grant.
  • LBT or LBT is not required.
  • the eNB needs to fill data in the guard interval GP or send a reserved signal to avoid the channel being occupied.
  • the eNB transmits uplink data (UL transmission) in the subframe k.
  • the eNB scheduled by the eNB after receiving the UL grant, the eNB scheduled by the eNB performs the Cat 2LBT according to the indication of the UL grant, and sends the uplink data after successfully competing for the channel; or directly sends the uplink data.
  • the eNB determines whether the transmission is completed.
  • the eNB performs S606;
  • the eNB determines whether the subframe k is located in the MCOT.
  • the eNB performs a Cat 2LBT before transmitting the UL grant, and continues to execute S610;
  • the eNB determines that the transmission in the subframe k fails, and proceeds to S605;
  • the eNB reselects the LBT parameter according to the BSR of the UE scheduled in the subframe k.
  • Embodiment 2 A scenario of another single self-contained subframe scheduling is described in this embodiment.
  • the base station uses the Cat 2LBT contention channel before transmitting the UL grant, and determines the parameters required for the user equipment to perform the Cat 4LBT according to the service priority in the BSR of the scheduled user equipment, such as the LBT competition window CW. .
  • the LBT parameters required by the user equipment are carried in the UL grant.
  • the scheduled user equipment uses the corresponding parameters according to the indication to perform the Cat 4LBT, and successfully competes to the channel.
  • the uplink data is sent, if the LBT fails, the uplink data cannot be sent, as shown in FIG. 7.
  • the specific process of this embodiment includes:
  • the eNB determines an LBT parameter.
  • the eNB selects the contention window CW according to the service priority in the BSR of the user equipment scheduled in the subframe, and randomly selects a number between 0 and CW as the initial value of the backoff number.
  • the eNB performs a Cat 2LBT, and after successfully competing for the channel, sends a UL grant, where the UL grant carries the LBT parameter.
  • the scheduled UE after receiving the UL grant, the scheduled UE performs the Cat 4LBT according to the LBT parameter, and determines whether the LBT is completed in the uplink transmission time indicated in the UL grant;
  • the scheduled UE performs uplink transmission at an uplink transmission time indicated by the UL grant. Among them, they are simultaneously adjusted Aligned transmissions between multiple user devices.
  • the scheduled UE determines that the LBT fails, and does not perform uplink transmission.
  • Embodiment 3 A scenario of multi-subframe scheduling is described in this embodiment.
  • the UL grant of the base station may schedule multiple subframes, and the base station uses the Cat 4LBT contention channel before transmitting the UL grant, and accesses the channel after the backoff, to obtain the maximum channel occupation time MCOT.
  • the base station sends a UL grant and carries indication information indicating the type of LBT that the scheduled user equipment needs to perform in each self-contained subframe in the UL grant.
  • the scheduled user equipment performs the Cat 2LBT or directly transmits the data according to the indication after receiving the UL grant.
  • the scheduled user equipment For the subsequent uplink subframes that are continuously scheduled, if the uplink subframe is located in the MCOT, the scheduled user equipment does not need to perform LBT before sending the uplink data; otherwise, the scheduled user equipment needs to perform Cat 4LBT.
  • the base station performs the Cat 2LBT before transmitting the UL grant; otherwise, the base station performs the Cat 4LBT before transmitting the UL grant.
  • the specific process of this embodiment includes:
  • the eNB selects the contention window CW according to the service priority in the BSR of the user equipment scheduled in the subframe k, and randomly selects a number between 0 and CW as the initial value of the backoff number.
  • the eNB competes for the channel through the Cat 4LBT, and obtains the MCOT after successfully competing for the channel.
  • the eNB sends a UL grant in the subframe k.
  • the eNB sends a UL grant, and indicates in the UL grant the LBT type that the scheduled UE needs to adopt before sending data in each subframe, such as Cat 2 or no LBT or Cat 4.
  • the eNB needs to fill the data in the guard interval GP or send a reserved signal to avoid the channel being occupied.
  • the UE performs the Cat 4LBT according to the LBT parameter, where the LBT parameter can be obtained from the UL grant.
  • the UE performs uplink transmission in the subframe k.
  • the scheduled UE after receiving the UL grant, the scheduled UE performs Cat 2LBT or Cat 4LBT according to the indication of the UL grant, and performs uplink transmission after successfully competing for the channel; or directly performs uplink transmission.
  • the eNB determines whether the transmission is completed.
  • the eNB determines whether the subframe k is located in the MCOT.
  • the eNB determines whether the subframe k is a self-contained subframe.
  • the eNB determines whether the subframe k is a self-contained subframe.
  • the eNB performs the Cat 2LBT before transmitting the UL grant, and after successfully competing for the channel, the process proceeds to S103;
  • the eNB updates the LBT parameters, and proceeds to S102;
  • the eNB reselects the LBT parameter according to the BSR of the user equipment scheduled in the subframe k.
  • the UE performs Cat 4LBT, and after successfully competing for the channel, proceeds to S104.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
  • a base station is further provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the method in the embodiment shown in FIG. 3, and therefore, the implementation of the base station can refer to the implementation of the method, and the repetition is performed. No longer.
  • a base station is provided, where the base station includes:
  • the determining module 111 is configured to determine, according to the service priority in the BSR of the user equipment scheduled in the self-contained subframe, a contention window required to execute the LBT, before sending the uplink scheduling;
  • the channel detection module 112 is configured to perform the LBT according to the contention window, and after the channel is idle, send the uplink scheduling corresponding to the user equipment in the self-contained subframe by using the channel; or use the LBT to detect After the channel is idle, the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe by using the channel, where the uplink scheduling carries the information of the contention window, so that the user equipment according to the competition The information of the window performs LBT.
  • the determining module 111 is specifically configured to:
  • the value of the service priority in the BSR in which the service priority is ranked determines the contention window.
  • the determining module 111 is specifically configured to:
  • Determining a value of a lowest service priority in a BSR of each user equipment determining the contention window according to the minimum value of the determined service priority values, or determining a value of a highest service priority in a BSR of each user equipment, Determining, according to the minimum value of the determined service priority values, the contention window; or determining a value of a service priority of the service priority ordering of each user equipment in the intermediate position, according to the determined service priority value The minimum value in the determination of the contention window.
  • the channel detecting module 112 is specifically configured to:
  • Channel detection is performed by using the type 2 LBT. After the channel is idle, the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe through the channel.
  • the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe through the channel.
  • the channel detecting module 112 is further configured to:
  • the uplink scheduling further includes indication information indicating a type of the LBT that the user equipment needs to perform.
  • indication information indicating a type of the LBT that the user equipment needs to perform.
  • the channel detection module passes After the uplink scheduling corresponding to the user equipment is sent in the self-contained subframe, the channel is further configured to: send data used to occupy the channel in a guard interval GP of the self-contained subframe Or signal.
  • another base station including: a transceiver 121, a processor 122, and a memory 123, wherein:
  • the processor 122 reads the program in the memory 123 and performs the following process:
  • Executing the LBT according to the contention window after detecting that the channel is idle, controlling the transceiver 121 to send the uplink scheduling corresponding to the user equipment in the self-contained subframe by using the channel; or detecting the channel by using the LBT After being idle, the transceiver 121 is configured to send, by using the channel, an uplink scheduling corresponding to the user equipment in the self-contained subframe, where the uplink scheduling carries information of the contention window, so that the user The device performs LBT according to the information of the contention window;
  • the transceiver 121 is configured to receive and transmit data under the control of the processor 122.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor 122 and various circuits of the memory represented by the memory 133.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 121 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the processor 122 is responsible for managing the bus architecture and general processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 123 can store data used by the processor 122 when performing operations.
  • the processor 122 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable Complex Programmable Logic Device (CPLD).
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • FPGA field-programmable gate array
  • CPLD complex programmable Complex Programmable Logic Device
  • the processor 122 For the processing performed by the processor 122, refer to the related descriptions of the determining module 111 and the channel detecting module 112 in the embodiment shown in FIG. 11 , and details are not described herein again.
  • the user equipment is also provided in the embodiment of the present invention.
  • the principle of the user equipment is similar to the method in the embodiment shown in FIG. 4, and the implementation of the user equipment may refer to the implementation of the method. The repetitions are not repeated here.
  • a user equipment including:
  • the receiving module 131 is configured to receive an uplink scheduling in the self-contained subframe.
  • the determining module 132 is configured to determine, according to the uplink scheduling, an LBT that is executed by itself;
  • the sending module 133 is configured to send uplink data in the self-contained subframe according to the uplink scheduling.
  • the uplink scheduling carries information of a contention window
  • the determining module 132 is specifically configured to: perform channel detection by using an LBT of type 4 according to the information of the contention window.
  • the uplink scheduling carries the indication information for indicating the type of the LBT that the user equipment needs to perform
  • the determining module 132 is specifically configured to: determine, according to the indication information, perform its own execution. The LBT type and execute the corresponding type of LBT.
  • the uplink scheduling does not carry any parameters required by the LBT, and the determining module 132 is specifically configured to:
  • the determining module 132 is specifically configured to:
  • Determining the contention window according to the value of the lowest service priority in the BSR; or determining the contention window according to the value of the highest service priority in the BSR; or ranking the intermediate position according to the service priority in the BSR The value of the business priority determines the contention window.
  • another user equipment including: a transceiver 141, a processor 142, and a memory 143, wherein:
  • the processor 142 reads the program in the memory 143 and performs the following process:
  • the transceiver 141 Receiving, by the transceiver 141, an uplink scheduling in a self-contained subframe; determining, according to the uplink scheduling, an LBT performed by itself; and controlling, according to the uplink scheduling, the transceiver 141 in the self-contained sub-
  • the uplink data is sent in the frame.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor 142 and various circuits of the memory represented by the memory 143.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 141 may be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the processor 142 is responsible for managing the bus architecture and general processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 143 can store data used by the processor 142 when performing operations.
  • the processor 142 may be a CPU, an ASIC, an FPGA, or a CPLD.
  • the processor 142 For the processing performed by the processor 142, refer to the descriptions of the receiving module 131, the determining module 132, and the sending module 133 in the embodiment shown in FIG. 13 , and details are not described herein again.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that the computer Or performing a series of operational steps on other programmable devices to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing a block in a flow or a flow and/or block diagram of the flowchart Or the steps of the function specified in multiple boxes.

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Abstract

本发明公开了一种上行LBT信道检测和上行数据发送方法、设备。方法包括：基站在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定执行LBT所需的竞争窗；所述基站根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者所述基站采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。

Description

一种上行LBT信道检测和上行数据发送方法、设备
本申请要求在2016年09月08日提交中国专利局、申请号为201610811901.8、申请名称为“一种上行LBT信道检测和上行数据发送方法、设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术，特别涉及一种基于自包含(self-contained)帧结构的上行先监听后发送(Listen Before Talk，简称LBT)信道检测和上行数据发送方法、设备。
背景技术
在无线局域网络(Wireless Local Area Networks，简称WLAN)中，采用基于带冲突避免的载波监听多址(Carrier Sense Multiple Access with Collision Avoidance，简称CSMA/CA)接入技术，节点在发送数据前需要先进行空闲信道评估(Clear Channel Assessment，简称CCA)，从而确定信道是否被占用。此外，为了保证多个节点同时竞争信道的公平性，还引入了随机退避的机制，各节点根据各自对应的竞争窗(Contention Window，简称CW)选择一个随机退避数，当检测时隙内信道空闲时，对应的退避数递减，只有当随机退避结束后，才可以接入信道，如图1所示。
为了提高传输带宽，进而提高数据传输率，3GPP在版本13(Release 13)中引入授权辅助接入(License Assisted Access，简称LAA)技术，充分利用未授权频段。在载波聚合的基础上，LAA技术支持在多个载波上并行收发，其中授权频段作为主载波，而未授权频段作为辅助子载波。现阶段，3GPP将LAA中的未授权频段部署在5GHz(仅支持下行传输)，而为了确保长期演进(Long Term Evolution，简称LTE)能够在公平友好的基础上与现有的接入技术(如WiFi)共存，工作在未授权频段的设备需要遵循LBT的原则以避免碰撞。
3GPP对于LAA的研究中，讨论了四种类型的LBT机制：
类型1(Cat 1)：数据发送前不执行CCA检测；
Cat 2：不做随机退避的LBT机制；
Cat 3：竞争窗固定的随机退避型LBT机制；
Cat 4：竞争窗可变的随机退避型LBT机制。
为了保证与WiFi的公平共存，Release 13中对于下行信道接入采用Cat 4类型的LBT机制，即eNB首先需要保证在一个延迟时间Td内检测信道为空闲，然后开始随机退避，当退避结束后接入信道，并获得相应的最大信道占用时间(Maximum Channel Occupy Time，简称MCOT)。
LTE系统中支持频分双工(Frequency Division Duplex，简称FDD)和时分双工(Time Division Duplex，简称TDD)两种帧结构，上下行传输具有独立的子帧。而下一代接入技术需要高速率、低时延等要求，对于TDD方式的帧结构，为了避免对子帧之间时序的严格要求，提出了基于自包含self-contained的TDD帧结构，支持数据和ACK/NACK或上行控制信息(Uplink Control Information，简称UCI)/下行控制信息(Downlink Control  Information，简称DCI)等控制信息位于同一个子帧传输，具体包括：以下行(Down Link，简称DL)为主的self-contained帧结构，如图2A所示；以及以上行(Up Link，简称UL)为主的self-contained帧结构，如图2B所示。
现有的LBT机制均是针对上下行独立传输的帧结构进行研究的，对基于self-contained帧结构的LBT信道检测，目前还没有可行的实现方案。
发明内容
本发明实施例提供了一种上行LBT信道检测和上行数据发送方法、设备，解决了现有的LBT机制均是针对上下行独立传输的帧结构进行研究的，对基于self-contained帧结构的LBT信道检测，目前还没有可行的实现方案。
第一方面，提供了一种上行LBT信道检测方法，所述方法包括：
基站在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定执行LBT所需的竞争窗；
所述基站根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者所述基站采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。
在实施中，所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗，包括以下三种可能的实现方式：
所述基站根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗，从而能够最大程度保证不同接入技术和不同用户设备之间的公平性；
或者
所述基站根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗，从而能够快速接入信道；或者
所述基站根据所述用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗，从而能够兼顾不同接入技术和不同用户设备之间的公平性和接入信道的速度。
进一步，若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗，包括：
所述基站确定每个用户设备的BSR中最低业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而能够最大程度保证不同接入技术和不同用户设备之间的公平性；或者
所述基站确定每个用户设备的BSR中最高业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而在保证了快速接入信道的同时，兼顾了不同接入技术和不同用户设备之间的公平性；或者
所述基站确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而在兼顾不同接入技术和不同用户设备之间的公平性和接入信道的速度的情况下，提高了接入信道的速度。
基于上述任一实施例，一种可能的实施方式中，所述基站采用LBT检测到信道空闲后通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，包括：
所述基站采用类型2的LBT，进行信道检测；
所述基站检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度。
一种可能的实施方式中，所述基站根据所述竞争窗执行LBT之后，所述方法还包括：
所述基站确定MCOT；若下一个进行上行调度的self-contained子帧位于所述MCOT内，所述基站在下一次上行调度之前，采用类型2的LBT，进行信道检测；若下一个进行上行调度的self-contained子帧位于所述MCOT外，所述基站在下一次上行调度之前，采用类型4的LBT，进行信道检测。
基于上述任一实施例，一种可能的实施方式中，所述上行调度中还携带用于指示所述用户设备需执行的LBT的类型的指示信息。
进一步，若所述指示信息指示所述用户设备执行类型1的LBT；所述基站通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还包括：
所述基站在所述self-contained子帧的保护间隔GP中，发送用于占用所述信道的数据或信号。
第二方面，提供了一种上行数据发送方法，包括：
用户设备在self-contained子帧中，接收到上行调度；
所述用户设备根据所述上行调度，确定自身执行的LBT；
所述用户设备根据所述上行调度，在所述self-contained子帧中发送上行数据。
一种可能的实施方式中，所述上行调度中携带竞争窗的信息，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
所述用户设备根据所述竞争窗的信息，采用类型4的LBT，进行信道检测。
一种可能的实施方式中，所述上行调度中携带用于指示所述用户设备需执行的LBT的类型的指示信息，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
所述用户设备根据所述指示信息，确定自身执行的LBT类型，并执行相应类型的LBT。
一种可能的实施方式中，所述上行调度中未携带任何LBT所需的参数，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
所述用户设备确定不执行LBT；或者
所述用户设备确定采用类型2的LBT，进行信道检测；或者
所述用户设备根据自身BSR中的业务优先级，确定执行LBT所需的竞争窗，并根据所述竞争窗执行LBT。
进一步，所述用户设备根据自身BSR中的业务优先级，确定执行LBT所需的竞争窗，包括：
所述用户设备根据所述BSR中最低业务优先级的值，确定所述竞争窗；或者
所述用户设备根据所述BSR中最高业务优先级的值，确定所述竞争窗；或者
所述用户设备根据所述BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
第三方面，提供了一种计算机可读存储介质，其中存储有可执行的程序代码，该程序代码用以实现第一方面所述的方法。
第四方面，提供了一种计算机可读存储介质，其中存储有可执行的程序代码，该程序代码用以实现第二方面所述的方法。
第五方面，提供了一种基站，所述基站包括用于执行第一方面中的方法的模块。
第六方面，提供了一种用户设备，所述用户设备包括用于执行第二方面中的方法的模块。
第七方面，提供了一种基站，所述基站包括：处理器、收发机、以及存储器，其中：所述处理器读取所述存储器中的程序，执行第一方面所述的方法。
第八方面，提供了一种用户设备，所述用户设备包括：处理器、收发机、以及存储器，其中：所述处理器读取所述存储器中的程序，执行第二方面所述的方法。
本发明实施例提供的方法和装置中，基站在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗；之后，基站可以根据该竞争窗执行LBT进行信道检测，从而保证了不同接入技术之间、不同用户设备之间的公平性，提高了信道接入的概率，还避免了用户设备进行频繁的CCA检测，基站也可以在检测到信道空闲后，将该竞争窗的信息通过上行调度发送给所调度的用户设备，以使用户设备根据该竞争窗的信息执行LBT进行信道检测，从而保证了不同接入技术之间、不同用户设备之间的公平性。
附图说明
图1为随机退避机制的示意图；
图2A为以下行为主的self-contained帧结构的示意图；
图2B为以上行为主的self-contained帧结构的示意图；
图3为本发明实施例提供的一种LBT信道检测方法的示意图；
图4为本发明实施例提供的一种上行数据发送方法的示意图；
图5为本发明实施例1中执行LBT的示意图；
图6为本发明实施例1的流程示意图；
图7为本发明实施例2中执行LBT的示意图；
图8为本发明实施例2的流程示意图；
图9A为本发明实施例3中一种执行LBT的示意图；
图9B为本发明实施例3中另一种执行LBT的示意图；
图10为本发明实施例3的流程示意图；
图11为本发明实施例提供的一种基站的示意图；
图12为本发明实施例提供的另一种基站的示意图；
图13为本发明实施例提供的一种用户设备的示意图；
图14为本发明实施例提供的另一种用户设备的示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
下面结合说明书附图对本发明实施例作进一步详细描述。应当理解，此处所描述的实施例仅用于说明和解释本发明，并不用于限定本发明。
图3所示的实施例中，提供了一种LBT信道检测方法，该检测方法包括：
S31、基站在发送上行调度前，根据self-contained子帧中所调度的用户设备的缓冲区状态报告(Buffer Status Report，简称BSR)中的业务优先级，确定LBT的竞争窗；
S32、所述基站根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者所述基站采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。
可选的，所述竞争窗的信息可以是所述竞争窗(CW)，即使是竞争窗的具体值；也可以是基于所述竞争窗确定的退避数的初始值，即所述基站从0～CW中随机选择一个数确定为类型4的LBT的退避数的初始值。
相应的，若所述竞争窗的信息为所述述竞争窗，则所述用户设备基于所述竞争窗确定的退避数的初始值，即所述用户设备从0～CW中随机选择一个数确定为类型4的LBT的退避数的初始值，开始随机退避；该方式下，不同用户设备所选择的退避数的初始值有可能不同；
若所述竞争窗的信息为退避数的初始值，所述用户设备直接采用退避数的初始值开始随机退避；该方式下，不同用户设备所选择的退避数的初始值相同。
本发明实施例中，基站在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗；之后，基站可以根据该竞争窗执行LBT进行信道检测，从而保证了不同接入技术之间、不同用户设备之间的公平性，提高了信道接入的概率，还避免了用户设备进行频繁的CCA检测，基站也可以在检测到信道空闲后，将该竞争窗的信息通过上行调度发送给所调度的用户设备，以使用户设备根据该竞争窗的信息执行LBT进行信道检测，从而保证了不同接入技术之间、不同用户设备之间的公平性。
本发明实施例中，S32的一种可能的实现方式中所述基站根据所述竞争窗执行LBT，即所述基站从0～CW之间随机选择一个数确定为退避数的初始值，并根据所述退避数的初始值，执行类型4的LBT，进行信道检测。
该方式中，若所述基站进行多子帧调度，所述基站根据所述竞争窗执行LBT之后，所述方法还包括：
所述基站确定最大信道占用时间(Maximum Channel Occupy Time，简称MCOT)；若下一个进行上行调度的self-contained子帧位于所述MCOT内，所述基站在下一次上行调度之前，采用类型2的LBT，进行信道检测；若下一个进行上行调度的self-contained子帧位于所述MCOT外，所述基站在下一次上行调度之前，采用类型4的LBT，进行信道检测。
本发明实施例中，S32的另一种可能的实现方式中所述基站采用类型2的LBT，进行信道检测，并在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，并在所述上行调度中携带所述竞争窗的信息，以使所述用户设备能够根据所述竞争窗的信息执行LBT，以进行信道检测。
一种可能的实现方式中，S32中所述基站发送的上行调度中还携带用于指示所述用户设备需执行的LBT的类型的指示信息，以使所述用户设备能够知道自身需要执行哪种类型 的LBT。
其中，LBT的类型包括：
Cat 1LBT，即所述用户设备在发送上行数据前不需要执行CCA检测；
Cat 2LBT，即所述用户设备在发送上行数据前需要执行设定时长的CCA检测，例如进行25μs的CCA检测；
Cat 3LBT，即所述用户设备在发送上行数据前需要执行竞争窗固定的随机退避型LBT；
Cat 4LBT，即所述用户设备在发送上行数据前需要执行竞争窗可变的随机退避型LBT。
基于上述任一实施例，若S32中所述基站根据所述竞争窗执行LBT，且所述指示信息指示所述用户设备执行类型1的LBT，则所述基站通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还包括：
所述基站在所述self-contained子帧的保护间隔(Guard Period，简称GP)中，发送用于占用所述信道的数据或信号，以占用所述信道。
基于上述任一实施例，S31中所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗，包括以下三种可能的实现方式：
方式1、所述基站根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗。
该方式中，若所述self-contained子帧中所调度的用户设备的数量为一个，所述基站根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗，从而能够最大程度保证不同接入技术和不同用户设备之间的公平性；若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述基站先确定每个用户设备的BSR中最低业务优先级的值，再根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而能够最大程度保证不同接入技术和不同用户设备之间的公平性。
当然，当所述self-contained子帧中所调度的用户设备的数量为至少两个时，也可以采用其他方式确定所述竞争窗，例如，所述基站先确定每个用户设备的BSR中最低业务优先级的值，再根据所确定的业务优先级值中的最大值，确定所述竞争窗，从而在保证了不同接入技术和不同用户设备之间的公平性的情况下，提高了接入信道的速度；又如，所述基站先确定每个用户设备的BSR中最低业务优先级的值，再根据所确定的业务优先级值中的中间值，确定所述竞争窗，从而在保证了不同接入技术和不同用户设备之间的公平性的情况下，兼顾了接入信道的速度；再如，所述基站先确定每个用户设备的BSR中最低业务优先级的值，再根据所确定的业务优先级值的平均值，确定所述竞争窗，从而在保证了不同接入技术和不同用户设备之间的公平性的情况下，兼顾了接入信道的速度。
方式2、所述基站根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗。
该方式中，若所述self-contained子帧中所调度的用户设备的数量为一个，所述基站根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗，从而能够快速接入信道；若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述基站先确定每个用户设备的BSR中最高业务优先级的值，再根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而在保证了快速接入信道的同时，兼顾了不同接入技术和不同用户设备之间的公平性。
当然，当所述self-contained子帧中所调度的用户设备的数量为至少两个时，也可以采 用其他方式确定所述竞争窗，例如，所述基站先确定每个用户设备的BSR中最高业务优先级的值，再根据所确定的业务优先级值中的最大值，确定所述竞争窗，从而最大程度上提高接入信道的速度；又如，所述基站先确定每个用户设备的BSR中最高业务优先级的值，再根据所确定的业务优先级值中的中间值，确定所述竞争窗，从而在保证了快速接入信道的同时，兼顾了不同接入技术和不同用户设备之间的公平性；再如，所述基站先确定每个用户设备的BSR中最高业务优先级的值，再根据所确定的业务优先级值的平均值，确定所述竞争窗，从而在保证了快速接入信道的同时，兼顾了不同接入技术和不同用户设备之间的公平性。
方式3、所述基站根据所述用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
该方式中，若所述self-contained子帧中所调度的用户设备的数量为一个，所述基站根据所述用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗，从而能够兼顾不同接入技术和不同用户设备之间的公平性和接入信道的速度；若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述基站确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗，从而在兼顾不同接入技术和不同用户设备之间的公平性和接入信道的速度的情况下，提高了接入信道的速度。
当然，当所述self-contained子帧中所调度的用户设备的数量为至少两个时，也可以采用其他方式确定所述竞争窗，例如，所述基站先确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最大值，确定所述竞争窗，从而在兼顾不同接入技术和不同用户设备之间的公平性和接入信道的速度的情况下，更大程度保证不同用户设备之间的公平性；又如，所述基站先确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的中间值，确定所述竞争窗；再如，所述基站先确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的平均值，确定所述竞争窗。
基于上述任一方式，所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗时，可以根据预先设定的用户设备的业务优先级与竞争窗(CW)之间的映射关系，确定所调度的用户设备的BSR中的业务优先级对应的竞争窗。
图4所示实施例中，提供了一种上行数据发送方法，与基站侧相同的部分请参见图3所示实施例中的相关描述，此处不再赘述，该发送方法包括：
S41、用户设备在self-contained子帧中，接收到上行调度；
S42、所述用户设备根据所述上行调度，确定自身执行的LBT；
S43、所述用户设备根据所述上行调度，在所述self-contained子帧中发送上行数据。
本发明实施例中，S42中所述用户设备根据所述上行调度，确定自身执行的LBT的一种可能的实现方式为：
若所述上行调度中携带竞争窗的信息，所述用户设备根据所述竞争窗的信息，采用类型4的LBT，进行信道检测。
具体的，若所述上行调度中携带的是所述竞争窗(CW)，即是竞争窗的具体值，则所述用户设备需要从0～CW中随机选择一个数确定为类型4的LBT的退避数的初始值，根据所确定的退避数的初始值进行信道检测；若所述上行调度中携带的是基于所述竞争窗确定 的退避数的初始值(即所述基站从0～CW中随机选择一个数确定为类型4的LBT的退避数的初始值)，则所述用户设备根据所述退避数的初始值进行信道检测。
本发明实施例中，S42中所述用户设备根据所述上行调度，确定自身执行的LBT的另一种可能的实现方式为：
若所述上行调度中携带用于指示所述用户设备需执行的LBT的类型的指示信息，所述用户设备根据所述指示信息，确定自身执行的LBT类型，并执行相应类型的LBT。
具体的，若所述指示信息指示所述用户设备执行类型1的LBT，则所述用户设备确定在发送上行数据前不需要执行CCA检测；若所述指示信息指示所述用户设备执行类型2的LBT，则所述用户设备确定在发送上行数据前需要执行设定时长的CCA检测，例如进行25μs的CCA检测；若所述指示信息指示所述用户设备执行类型3的LBT，则所述用户设备确定在发送上行数据前需要执行竞争窗固定的随机退避型LBT；若所述指示信息指示所述用户设备执行类型4的LBT，则所述用户设备确定在发送上行数据前需要执行竞争窗可变的随机退避型LBT。
进一步，若所述指示信息指示所述用户设备执行类型4的LBT，且所述上行调度中携带所述竞争窗的信息，则所述用户设备根据所述竞争窗的信息，采用类型4的LBT，进行信道检测；
若所述指示信息指示所述用户设备执行类型4的LBT，且所述上行调度中未携带所述竞争窗的信息，则所述用户设备自行确定竞争窗，并根据所确定的竞争窗采用类型4的LBT，进行信道检测。具体的，所述用户设备从0～CW之间随机选择一个数确定为退避数的初始值，并根据所述退避数的初始值，执行类型4的LBT，进行信道检测。
可选的，所述用户设备确定竞争窗，包括以下三种可能的实现方式：
一、所述用户设备根据自身BSR中最低业务优先级的值，确定竞争窗；
二、所述用户设备根据自身BSR中最高业务优先级的值，确定竞争窗；
三、所述用户设备根据自身BSR中业务优先级排序处于中间位置的业务优先级的值，确定竞争窗。
当然，本发明实施例不限定上述三种方式确定竞争窗，还可以采用其他方式，例如，所述用户设备根据自身BSR中业务优先级的值的平均值，确定竞争窗，等等。本发明实施例不进行限定。
本发明实施例中，S42中所述用户设备根据所述上行调度，确定自身执行的LBT的再一种可能的实现方式为：
若所述上行调度中未携带任何LBT所需的参数，所述用户设备确定不执行LBT；或者所述用户设备确定采用类型2的LBT，进行信道检测；或者所述用户设备根据自身BSR中的业务优先级，确定执行LBT所需的竞争窗，并根据所述竞争窗执行LBT。
具体的，若所述上行调度中未携带任何LBT所需的参数，优选的方式是所述用户设备根据自身BSR中的业务优先级，确定执行LBT所需的竞争窗，并根据所述竞争窗执行LBT。
下面通过三个具体实施例，对本发明实施例提供的方法进行详细描述。
实施例1：本实施例中描述了一种单个self-contained子帧调度的场景。本实施例中，基站在发送UL grant之前采用Cat 4LBT竞争信道，即基站首先需要在一个延迟时间Td内检测信道为空闲，然后开始随机退避。其中，退避过程具体如下：
1)基站选择相应的竞争窗CW，在0～CW之间随机选择一个值作为随机退避的初始值 N0；
2)基站判断Ni是否大于0；
若是，则退避结束；
若否，即Ni>0，则令Ni+1＝Ni-1，i＝0,1,…；
3)基站在时隙Ts内进行CCA检测；
若信道空闲，转入2)；
若信道忙，转入4)；
4)基站在一个额外的延迟时间Td内进行CCA检测；
若信道空闲，转入2)；
若信道忙，转入4)。
基站在退避结束后，接入信道发送UL grant，并获得相应的最大信道占用时间(Maximum Channel Occupy Time，简称MCOT)。对于后续的子帧，如果位于MCOT内，基站发送UL grant前进行Cat 2LBT；如果位于MCOT外，基站需要通过Cat 4LBT重新竞争信道。
相应的，被调度的用户设备在收到UL grant之后，根据UL grant的指示进行Cat 2LBT或者直接发送数据，具体过程如图5所示。
本实施例中，基站确定LBT的竞争窗CW时采用的方案具体参见图3所示实施例中的相关描述，此处不再赘述。
本实施例中，一种可能的实现方式，所述上行调度中携带指示所述用户设备在发送上行数据前不需要进行LBT的指示信息。
相应的，被调度的用户设备在接收到所述上行调度后，不进行LBT，直接发送上行数据。
该方式下，所述基站通过所述信道，在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还包括：
所述基站在所述self-contained子帧的保护间隔GP中，发送用于占用所述信道的数据或信号，以避免所述信道被占用。
本实施例中，另一种可能的实现方式，若所述上行调度包括用于指示所述用户设备在发送上行数据前进行类型2的LBT的指示信息，或者所述上行调度未包括任何用于指示所述用户设备在发送上行数据前进行LBT的指示信息，则被调度的用户设备在接收到所述上行调度后，采用类型2的LBT，进行信道检测，并在确定信道空闲后，通过所述信道，在所述self-contained子帧中发送上行数据。
具体的，被调度的用户设备在接收到所述上行调度后，进行25μs的CCA检测，当检测信道为空闲后，通过所述信道，在所述self-contained子帧中发送上行数据。
本实施例的具体流程，如图6所示，包括：
S601、配置子帧k的初始值，即k＝0，初始化LBT参数。
S602、eNB通过Cat 4LBT竞争信道，并在成功竞争到信道后获得MCOT。
具体的，eNB根据子帧k中所调度的UE的BSR中的业务优先级，选择竞争窗CW，并在0～CW之间随机选择一个数作为退避数的初始值。
S603、eNB在子帧k中发送上行调度(UL grant)。
具体的，基站发送UL grant调度UE，并在UL grant中指示UE发送数据前需要进行Cat 2 LBT或者无需进行LBT。
进一步，若eNB在UL grant中指示eNB发送数据前不进行LBT，则eNB需要在保护间隔GP内填充数据或者发送保留信号以避免信道被占用。
S604、eNB在子帧k中，发送上行数据(UL transmission)。
具体的，eNB所调度的eNB在收到UL grant之后，根据UL grant的指示，进行Cat 2LBT，并在成功竞争到信道后，发送上行数据；或者直接发送上行数据。
S605、eNB判断传输是否完成；
若是，结束流程；
若否，eNB执行S606；
S606、eNB令k＝k+1；
S607、eNB判断子帧k是否位于MCOT内；
若是，执行S608；
若否，执行S609；
S608、eNB在发送UL grant之前，进行Cat 2LBT，继续执行S610；
S610、判断是否成功竞争到信道；
若成功竞争到信道，转入S603；
若未成功竞争到信道，执行S611；
S611、eNB确定子帧k中的传输失败，并转入S605；
S609、eNB更新LBT参数，并转入S602；
具体的，eNB根据子帧k中调度的UE的BSR重新选择LBT参数。
实施例2：本实施例中描述了另一种单个self-contained子帧调度的场景。本实施例中，基站在发送UL grant之前采用Cat 2LBT竞争信道，同时根据所调度的用户设备的BSR中的业务优先级，确定用户设备进行Cat 4LBT时所需的参数，如LBT的竞争窗CW。基站成功竞争到信道后，将用户设备需要的LBT参数携带在UL grant中发送，被调度的用户设备在收到UL grant之后，根据指示利用对应的参数，进行Cat 4LBT，并在成功竞争到信道后发送上行数据，若LBT失败，则不能发送上行数据，如图7所示。
本实施例中，根据所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗CW的方法请参见实施例二中的相关描述，此处不再赘述。
本实施例的具体流程，如图8所示，包括：
S81、eNB确定LBT参数。
具体的，eNB根据子帧中所调度用户设备的BSR中的业务优先级，选择竞争窗CW，并在0～CW之间随机选择一个数作为退避数的初始值。
S82、eNB进行Cat 2LBT，并在成功竞争到信道后，发送UL grant，其中，UL grant中携带LBT参数。
S83、被调度的UE是否在上行传输时刻之前完成LBT；
具体的，被调度的UE在收到UL grant后，根据LBT参数，进行Cat 4LBT，并判断是否在UL grant中指示的上行传输时刻完成LBT；
若是，执行S84；
若否，执行S85；
S84、被调度的UE在UL grant中指示的上行传输时刻进行上行传输。其中，被同时调 度的多个用户设备之间保持对齐传输。
S85、被调度的UE确定LBT失败，不进行上行传输。
实施例3：本实施例中描述了一种多子帧调度的场景。本实施例中，基站的UL grant可调度多个子帧，基站发送UL grant之前采用Cat 4LBT竞争信道，退避结束后接入信道，获得最大信道占用时间MCOT。基站发送UL grant，并在UL grant中携带用于指示所调度的用户设备在每个self-contained子帧中需执行的LBT的类型的指示信息。
如图9A和图9B所示，对于当前子帧内的上行传输，被调度的用户设备在收到UL grant之后根据指示进行Cat 2LBT或者直接发送数据。而对于后续被连续调度的上行子帧，如果该上行子帧位于MCOT内，被调度的用户设备发送上行数据之前无需再进行LBT；否则，被调度的用户设备需要进行Cat 4LBT。同样对于下一次UL grant的发送，如果下一次UL grant所在子帧位于MCOT之内，基站发送UL grant之前进行Cat 2LBT；否则，基站发送UL grant之前进行Cat 4LBT。
本实施例的具体流程，如图10所示，包括：
S101、配置子帧k的初始值，即k＝0，初始化LBT参数。
具体的，eNB根据子帧k中所调度用户设备的BSR中的业务优先级，选择竞争窗口CW，并在0～CW之间随机选择一个数作为退避数的初始值。
S102、eNB通过Cat 4LBT竞争信道，并在成功竞争到信道后获得MCOT。
S103、eNB在子帧k中发送UL grant。
具体的，eNB发送UL grant，并在UL grant中指示被调度的UE每个子帧发送数据前需要采用的LBT类型，如Cat 2或者无需LBT或者Cat 4。对于当前子帧，若指示UE发送数据前不进行LBT，则eNB需要在保护间隔GP内填充数据或者发送保留信号以避免信道被占用。对于后续被调度的上行子帧，如果位于MCOT内，UE发送上行数据前不进行LBT；否则，UE发送上行数据前，根据LBT参数进行Cat 4LBT，其中，LBT参数可以从UL grant中获取。
S104、UE在子帧k中，进行上行传输。
具体的，被调度的UE在收到UL grant之后，根据UL grant的指示，进行Cat 2LBT或者Cat 4LBT，并在成功竞争到信道后，进行上行传输；或者直接进行上行传输。
S105、eNB判断是否完成传输；
若是，结束流程；
若否，执行S106；
S106、eNB令k＝k+1；
S107、eNB判断子帧k是否位于MCOT内；
若是，执行S108；
若否，执行S109；
S108、eNB判断子帧k是否为self-contained子帧；
若是，执行S110；
若否，执行S104；
S109、eNB判断子帧k是否为self-contained子帧；
若是，执行S111；
若否，执行S112；
S110、eNB在发送UL grant之前，进行Cat 2LBT，并在成功竞争到信道后，转入S103；
S111、eNB更新LBT参数，并转入S102；
具体的，eNB根据子帧k中调度的用户设备的BSR重新选择LBT参数；
S112、UE进行Cat 4LBT，并在成功竞争到信道后，转入S104。
上述方法处理流程可以用软件程序实现，该软件程序可以存储在存储介质中，当存储的软件程序被调用时，执行上述方法步骤。
基于同一发明构思，本发明实施例中还提供了一种基站，由于该基站解决问题的原理与上述图3所示实施例的方法相似，因此该基站的实施可以参见方法的实施，重复之处不再赘述。
图11所示实施例中，提供了一种基站，所述基站包括：
确定模块111，用于在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定执行LBT所需的竞争窗；
信道检测模块112，用于根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。
可选的，所述确定模块111具体用于：
根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗；或者根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗；或者根据所述用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。具体参见图3所示实施例中的相关描述，此处不再赘述。
可选的，若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述确定模块111具体用于：
确定每个用户设备的BSR中最低业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者确定每个用户设备的BSR中最高业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗。具体参见图3所示实施例中的相关描述，此处不再赘述。
基于上述任一实施例，可选的，所述信道检测模块112具体用于：
采用类型2的LBT，进行信道检测；检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度。具体参见图3所示实施例中的相关描述，此处不再赘述。
可选的，所述信道检测模块112根据所述竞争窗执行LBT之后，还用于：
确定最大信道占用时间MCOT；若下一个进行上行调度的self-contained子帧位于所述MCOT内，在下一次上行调度之前，采用类型2的LBT，进行信道检测；若下一个进行上行调度的self-contained子帧位于所述MCOT外，在下一次上行调度之前，采用类型4的LBT，进行信道检测。具体参见图3所示实施例中的相关描述，此处不再赘述。
基于上述任一实施例，可选的，所述上行调度中还携带用于指示所述用户设备需执行的LBT的类型的指示信息。具体参见图3所示实施例中的相关描述，此处不再赘述。
可选的，若所述指示信息指示所述用户设备执行类型1的LBT；所述信道检测模块通过 所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还用于：在所述self-contained子帧的保护间隔GP中，发送用于占用所述信道的数据或信号。
图12所示实施例中，提供了另一种基站，包括：收发机121、处理器122、以及存储器123，其中：
所述处理器122读取所述存储器123中的程序，执行如下过程：
在发送上行调度前，根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定执行LBT所需的竞争窗；
根据所述竞争窗执行LBT，在检测到信道空闲后，控制所述收发机121通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者采用LBT检测到信道空闲后，控制所述收发机121通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT；
所述收发机121，用于在所述处理器122的控制下接收和发送数据。
在图12中，总线架构可以包括任意数量的互联的总线和桥，具体由所述处理器122代表的一个或多个处理器和所述存储器133代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机121可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。所述处理器122负责管理总线架构和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。所述存储器123可以存储所述处理器122在执行操作时所使用的数据。
可选的，所述处理器122可以是中央处理器(CPU)、专用集成电路(Application Specific Integrated Circuit，简称ASIC)、现场可编程门阵列(Field－Programmable Gate Array，简称FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，简称CPLD)。
本发明实施例中，所述处理器122所执行的处理具体参见图11所示实施例中确定模块111和信道检测模块112的相关描述，此处不再赘述。
基于同一发明构思，本发明实施例中还提供了一种用户设备，由于该用户设备解决问题的原理与上述图4所示实施例的方法相似，因此该用户设备的实施可以参见方法的实施，重复之处不再赘述。
图13所示实施例中，提供了一种用户设备，包括：
接收模块131，用于在self-contained子帧中，接收到上行调度；
确定模块132，用于根据所述上行调度，确定自身执行的LBT；
发送模块133，用于根据所述上行调度，在所述self-contained子帧中发送上行数据。
一种可能的实施方式中，所述上行调度中携带竞争窗的信息，所述确定模块132具体用于：根据所述竞争窗的信息，采用类型4的LBT，进行信道检测。
另一种可能的实施方式中，所述上行调度中携带用于指示所述用户设备需执行的LBT的类型的指示信息，所述确定模块132具体用于：根据所述指示信息，确定自身执行的LBT类型，并执行相应类型的LBT。
另一种可能的实施方式中，所述上行调度中未携带任何LBT所需的参数，所述确定模块132具体用于：
确定不执行LBT；或者确定采用类型2的LBT，进行信道检测；或者根据所述用户设备的BSR中的业务优先级，确定执行LBT所需的竞争窗，并根据所述竞争窗执行LBT。
可选的，所述确定模块132具体用于：
根据所述BSR中最低业务优先级的值，确定所述竞争窗；或者根据所述BSR中最高业务优先级的值，确定所述竞争窗；或者根据所述BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
图14所示实施例中，提供了另一种用户设备，包括：收发机141、处理器142、以及存储器143，其中：
所述处理器142读取所述存储器143中的程序，执行如下过程：
通过所述收发机141在self-contained子帧中，接收到上行调度；根据所述上行调度，确定自身执行的LBT；根据所述上行调度，控制所述收发机141在所述self-contained子帧中发送上行数据。
在图14中，总线架构可以包括任意数量的互联的总线和桥，具体由所述处理器142代表的一个或多个处理器和所述存储器143代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机141可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。所述处理器142负责管理总线架构和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。所述存储器143可以存储所述处理器142在执行操作时所使用的数据。
可选的，所述处理器142可以是CPU、ASIC、FPGA或CPLD。
本发明实施例中，所述处理器142所执行的处理具体参见图13所示实施例中接收模块131、确定模块132和发送模块133的相关描述，此处不再赘述。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (24)

  1. 一种上行先监听后发送LBT信道检测方法，其特征在于，所述方法包括：
    基站在发送上行调度前，根据自包含self-contained子帧中所调度的用户设备的缓冲区状态报告BSR中的业务优先级，确定执行LBT所需的竞争窗；
    所述基站根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者所述基站采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。
  2. 如权利要求1所述的方法，其特征在于，所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗，包括：
    所述基站根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗；或者
    所述基站根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗；或者
    所述基站根据所述用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
  3. 如权利要求2所述的方法，其特征在于，若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述基站根据self-contained子帧中所调度的用户设备的BSR中的业务优先级，确定LBT的竞争窗，包括：
    所述基站确定每个用户设备的BSR中最低业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者
    所述基站确定每个用户设备的BSR中最高业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者
    所述基站确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗。
  4. 如权利要求1～3任一项所述的方法，其特征在于，所述基站采用LBT检测到信道空闲后通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，包括：
    所述基站采用类型2的LBT，进行信道检测；
    所述基站检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度。
  5. 如权利要求1所述的方法，其特征在于，所述基站根据所述竞争窗执行LBT之后，所述方法还包括：
    所述基站确定最大信道占用时间MCOT；
    若下一个进行上行调度的self-contained子帧位于所述MCOT内，所述基站在下一次上行调度之前，采用类型2的LBT，进行信道检测；
    若下一个进行上行调度的self-contained子帧位于所述MCOT外，所述基站在下一次上行调度之前，采用类型4的LBT，进行信道检测。
  6. 如权利要求1～3任一项所述的方法，其特征在于，所述上行调度中还携带用于指示所述用户设备需执行的LBT的类型的指示信息。
  7. 如权利要求6所述的方法，其特征在于，若所述指示信息指示所述用户设备执行类型1的LBT；所述基站通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还包括：
    所述基站在所述self-contained子帧的保护间隔GP中，发送用于占用所述信道的数据或信号。
  8. 一种上行数据发送方法，其特征在于，所述方法包括：
    用户设备在自包含self-contained子帧中，接收到上行调度；
    所述用户设备根据所述上行调度，确定自身执行的先监听后发送LBT；
    所述用户设备根据所述上行调度，在所述self-contained子帧中发送上行数据。
  9. 如权利要求8所述的方法，其特征在于，若所述上行调度中携带竞争窗的信息，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
    所述用户设备根据所述竞争窗的信息，采用类型4的LBT，进行信道检测。
  10. 如权利要求8所述的方法，其特征在于，所述上行调度中携带用于指示所述用户设备需执行的LBT的类型的指示信息，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
    所述用户设备根据所述指示信息，确定自身执行的LBT类型，并执行相应类型的LBT。
  11. 如权利要求8所述的方法，其特征在于，若所述上行调度中未携带任何LBT所需的参数，所述用户设备根据所述上行调度，确定自身执行的LBT，包括：
    所述用户设备确定不执行LBT；或者
    所述用户设备确定采用类型2的LBT，进行信道检测；或者
    所述用户设备根据自身缓冲区状态报告BSR中的业务优先级，确定执行LBT所需的竞争窗，并根据所述竞争窗执行LBT。
  12. 如权利要求11所述的方法，其特征在于，所述用户设备根据自身缓冲区状态报告BSR中的业务优先级，确定执行LBT所需的竞争窗，包括：
    所述用户设备根据所述BSR中最低业务优先级的值，确定所述竞争窗；或者
    所述用户设备根据所述BSR中最高业务优先级的值，确定所述竞争窗；或者
    所述用户设备根据所述BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
  13. 一种基站，其特征在于，所述基站包括：
    确定模块，用于在发送上行调度前，根据自包含self-contained子帧中所调度的用户设备的缓冲区状态报告BSR中的业务优先级，确定执行LBT所需的竞争窗；
    信道检测模块，用于根据所述竞争窗执行LBT，在检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度；或者采用LBT检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度，所述上行调度中携带所述竞争窗的信息，以使所述用户设备根据所述竞争窗的信息执行LBT。
  14. 如权利要求13所述的基站，其特征在于，所述确定模块具体用于：
    根据所述用户设备的BSR中最低业务优先级的值，确定所述竞争窗；或者根据所述用户设备的BSR中最高业务优先级的值，确定所述竞争窗；或者根据所述用户设备的 BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
  15. 如权利要求14所述的基站，其特征在于，若所述self-contained子帧中所调度的用户设备的数量为至少两个，所述确定模块具体用于：
    确定每个用户设备的BSR中最低业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者
    确定每个用户设备的BSR中最高业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗；或者
    确定每个用户设备的BSR中业务优先级排序处于中间位置的业务优先级的值，根据所确定的业务优先级值中的最小值，确定所述竞争窗。
  16. 如权利要求14～15任一项所述的基站，其特征在于，所述信道检测模块具体用于：
    采用类型2的LBT，进行信道检测；检测到信道空闲后，通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度。
  17. 如权利要求13所述的基站，其特征在于，所述信道检测模块根据所述竞争窗执行LBT之后，还用于：
    确定最大信道占用时间MCOT；若下一个进行上行调度的self-contained子帧位于所述MCOT内，在下一次上行调度之前，采用类型2的LBT，进行信道检测；若下一个进行上行调度的self-contained子帧位于所述MCOT外，在下一次上行调度之前，采用类型4的LBT，进行信道检测。
  18. 如权利要求13～15任一项所述的基站，其特征在于，所述上行调度中还携带用于指示所述用户设备需执行的LBT的类型的指示信息。
  19. 如权利要求18所述的基站，其特征在于，若所述指示信息指示所述用户设备执行类型1的LBT；所述信道检测模块通过所述信道在所述self-contained子帧中发送所述用户设备对应的上行调度之后，还用于：
    在所述self-contained子帧的保护间隔GP中，发送用于占用所述信道的数据或信号。
  20. 一种用户设备，其特征在于，所述用户设备包括：
    接收模块，用于在自包含self-contained子帧中，接收到上行调度；
    确定模块，用于根据所述上行调度，确定自身执行的先监听后发送LBT；
    发送模块，用于根据所述上行调度，在所述self-contained子帧中发送上行数据。
  21. 如权利要求20所述的用户设备，其特征在于，若所述上行调度中携带竞争窗的信息，所述确定模块具体用于：根据所述竞争窗的信息，采用类型4的LBT，进行信道检测。
  22. 如权利要求20所述的用户设备，其特征在于，所述上行调度中携带用于指示所述用户设备需执行的LBT的类型的指示信息，所述确定模块具体用于：根据所述指示信息，确定自身执行的LBT类型，并执行相应类型的LBT。
  23. 如权利要求20所述的用户设备，其特征在于，若所述上行调度中未携带任何LBT所需的参数，所述确定模块具体用于：
    确定不执行LBT；或者
    确定采用类型2的LBT，进行信道检测；或者
    根据所述用户设备的缓冲区状态报告BSR中的业务优先级，确定执行LBT所需的竞 争窗，并根据所述竞争窗执行LBT。
  24. 如权利要求23所述的用户设备，其特征在于，所述确定模块具体用于：
    根据所述BSR中最低业务优先级的值，确定所述竞争窗；或者
    根据所述BSR中最高业务优先级的值，确定所述竞争窗；或者
    根据所述BSR中业务优先级排序处于中间位置的业务优先级的值，确定所述竞争窗。
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