CN105991272A

CN105991272A - Data transmission method and apparatus

Info

Publication number: CN105991272A
Application number: CN201510081611.8A
Authority: CN
Inventors: 施小娟; 赵亚军; 韩立锋
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2016-10-05
Also published as: WO2016127648A1

Abstract

The invention provides a data transmission method and apparatus. The method comprises: a semi-static scheduling opportunity that is configured by a first base station and is used for indicating user equipment (UE) to carry out data transmission with a second base station within predetermined time, wherein the second base station and the UE carry out data transmission by an unauthorized carrier; an activation notification that is sent by the first base station and is used for activating the semi-static scheduling opportunity is received, wherein the activation notification is sent by the first base station after interaction of the first base station and the second base station when the first base station and the second base station are different base stations; and according to the activation notification, data transmission with the second base station is carried out. According to the invention, a problem of interference existence caused by data transmission on an unauthorized carrier in the prior art can be solved; and thus an effect of interference reduction during data transmission on an unauthorized carrier can be realized.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method and apparatus.

Background

According to the prediction of the International Telecommunications Union (ITU for short), with the continuous increase of the mobile communication demand of users, in 2020, the mobile communication service may increase by more than 500 times or even 1000 times, so that various possible technologies are being discussed in the wireless communication industry to expand the network capability and enhance the network coverage, thereby satisfying the explosive growth situation of the mobile service. One of the directions is to exploit and utilize as many frequency resources as possible, taking Universal Mobile Telecommunications System (UMTS) for short, Long Term Evolution System (LTE for short) as an example, the frequencies currently used by these conventional cellular communication systems are all frequencies that are exclusively used by operators through bidding, that is, authorized frequencies (licensed/licensed bands) (also may be referred to as authorized carriers), and the operators exclusively and exclusively use the authorized frequencies in a certain time and a certain area to deploy the conventional cellular communication systems according to the authorization condition of the authorized frequencies purchased through bidding. With the rapid development of mobile communication, licensed frequency resources are becoming scarce, and operators are becoming expensive to auction for licensed frequencies, so that in the process of exploring the use of new frequency resources, the wireless communication industry aims at abundant unlicensed frequency (unlicensed/unlicensed band/license-empty band) (also referred to as unlicensed carrier) resources, such as 2.4GHz, 5GHz, 60GHz and other frequency spectrums, which can be used for free without authorization.

Unlicensed frequencies are abundant in frequency resources and free to use, and are currently used by some Wireless communication networks, for example, a large number of Wireless Local Area Networks (WLANs) and Wireless Personal Area Networks (WPANs) are deployed on a 2.4GHz band, and similarly, WLANs and WPANs gradually start to use a large number of bands such as 5GHz and 60 GHz. Therefore, when the conventional cellular mobile communication systems such as LTE, UMTS and the like deployed by each operator wish to use unlicensed frequencies, careful consideration must be given to the usage method of unlicensed frequencies so as to avoid mutual interference between the conventional cellular mobile communication systems deployed by different operators and interference between the conventional cellular mobile communication systems and the active wireless communication networks in unlicensed frequency bands, and to ensure efficient and fair use of unlicensed frequencies between different systems and different networks.

In order to solve the problem of interference generated during data transmission on an unlicensed carrier in the related art, no effective solution has been proposed at present.

Disclosure of Invention

The invention provides a data transmission method and a data transmission device, which at least solve the problem that interference is generated when data transmission is carried out on an unauthorized carrier wave in the related technology.

According to an aspect of the present invention, there is provided a data transmission method, which is applied to a multi-carrier scenario, where a user equipment UE has multi-carrier capability, the UE has a capability of communicating with a first cell controlled by a first base station, and the UE also has a capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps: receiving a semi-persistent scheduling opportunity configured by a first base station and used for indicating the UE to perform data transmission with a second base station at a preset time, wherein the second base station and the UE perform data transmission through the unlicensed carrier; receiving an activation notification sent by the first base station for activating the semi-persistent scheduling opportunity, wherein when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after interaction between the first base station and the second base station; and carrying out data transmission with the second base station according to the activation notification.

Further, receiving the semi-persistent scheduling opportunity configured by the first base station for instructing the UE to perform data transmission with the second base station at a predetermined time comprises: receiving a specific semi-static scheduling opportunity of the UE configured for the UE by the first base station; and receiving a semi-static scheduling opportunity which is configured by the first base station for all the UE in the first cell where the UE is located and is common to the cells.

Further, the specific semi-persistent scheduling opportunity of the UE and the semi-persistent scheduling opportunity common to the cells both include a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter.

Further, the UE specific semi-persistent scheduling opportunity further includes at least one of the following information: a semi-static scheduling identifier, a hybrid automatic repeat request HARQ process which can be used by semi-static scheduling, an automatic deactivation semi-static scheduling opportunity timer, an automatic deactivation semi-static scheduling opportunity counter and a semi-static scheduling opportunity period starting point offset; the semi-persistent scheduling opportunity common to the cells further comprises at least one of the following information: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

Further, the semi-persistent scheduling opportunity period is less than or equal to a small data traffic burst statistical period transmitted by the UE; and/or the semi-static scheduling opportunity period is less than or equal to a fixed frame period of performing listen before use of the device FBE based on a frame structure.

Further, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where when the UE receives the activation notification sent by the first base station to each UE respectively, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station; when the UE receives a common activation notification sent by the first base station to one or more UEs, the common activation notification includes semi-static scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink authorization information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station; after receiving the common activation notification, the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity; when the UE receives a common activation notification sent by the first base station to one or more UEs, the common activation notification comprises: a semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, wherein the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification; wherein, the downlink assignment information includes at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process allocated by the first base station for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation and coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting the uplink data; and when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the UE monitors and receives the activation notification in a common search space of a Physical Downlink Control Channel (PDCCH) of the first base station by using an activation scheduling identifier, wherein the activation scheduling identifier is obtained from the received semi-persistent scheduling opportunity or is obtained according to protocol standard regulation.

Further, after the UE receives the activation notification respectively sent by the first base station to each UE, the data transmission with the second base station according to the activation notification includes at least one of the following: detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing the resources indicated by the uplink authorization information to send data to the second base station in each semi-static scheduling opportunity within channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; when the detection result shows that the channel state is busy, transmitting data to the second base station by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time; within the activation time of the semi-persistent scheduling opportunities, receiving data sent by the second base station on the resources indicated by the downlink assignment information directly at each semi-persistent scheduling opportunity; detecting the channel state of the unlicensed carrier in idle channel detection time within semi-persistent scheduling opportunity activation time, and when the detection result shows that the channel state is idle, directly receiving data sent by the second base station on resources indicated by the downlink assignment information in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station; wherein the semi-persistent scheduling opportunity activation time is a time from when the UE receives the activation notification to activate the semi-persistent scheduling opportunity until the semi-persistent scheduling opportunity is deactivated.

Further, before the UE receives the activation notification respectively sent by the first base station to each UE, the method further includes: detecting the channel state of the unauthorized carrier at the idle channel detection time; and when the detection result shows that the channel state is idle, sending request information for requesting activation of the semi-static scheduling opportunity to the first base station, wherein when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

Further, when the UE receives a common activation notification sent by the first base station to one or more UEs, and the common activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, performing data transmission with the second base station according to the activation notification includes at least one of: detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing resources, which are correspondingly allocated to the uplink authorization information of the UE in the common activation notification, to send data to the second base station in each semi-static scheduling opportunity within channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; when the detection result shows that the channel state is busy, transmitting data to the second base station by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time; within the activation time of the semi-persistent scheduling opportunities, directly receiving data sent by the second base station on resources corresponding to the downlink assignment information indication allocated to the UE at each semi-persistent scheduling opportunity; detecting the channel state of the unlicensed carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result indicates that the channel state is idle, receiving data sent by the second base station in each semi-persistent scheduling opportunity directly on a resource indicated by downlink assignment information which is correspondingly allocated to the UE in an activation notification within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station; wherein the semi-persistent scheduling opportunity activation time is a time from when the UE receives the activation notification to activate the semi-persistent scheduling opportunity until the semi-persistent scheduling opportunity is deactivated.

Further, before the UE receives a common activation notification sent by the first base station to one or more UEs, where the common activation notification includes a semi-static scheduling identifier of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, the method further includes: detecting a channel state of the unlicensed carrier; and when the detection result shows that the channel state is idle, sending request information for requesting activation of the semi-static scheduling opportunity to the first base station, wherein when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

Further, after the UE receives a common activation notification allocated by the first base station for one or more UEs, the common activation notification includes: the semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, where when the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification, performing data transmission with the second base station according to the activation notification includes at least one of: within the activation time of the semi-persistent scheduling opportunities, receiving data sent by the second base station on resources indicated by the one or more downlink assignment information included in the activation notification at each semi-persistent scheduling opportunity directly; detecting the channel state of the unlicensed carrier in idle channel detection time within semi-persistent scheduling opportunity activation time, and when the detection result indicates that the channel state is idle, receiving data sent by the second base station in each semi-persistent scheduling opportunity directly on resources indicated by the one or more downlink assignment information included in the common activation notification within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station; receiving scheduling control information which is sent by the first base station and used for indicating the corresponding use relation of the one or more downlink assignment information and the one or more UE after the second base station determines that the channel state of the unlicensed carrier is idle; receiving data sent by the second base station directly on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information; detecting the channel state of the unlicensed carrier within semi-persistent scheduling opportunity activation time, and when the detection result indicates that the channel state is idle, directly receiving data sent by a second base station on a resource indicated by downlink assignment information corresponding to the UE, which is indicated by scheduling control information sent by a first base station after the first base station determines that the channel state of the unlicensed carrier is idle, wherein the scheduling control information is used for indicating corresponding usage relations between the one or more downlink assignment information and the one or more UEs; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station; wherein the semi-persistent scheduling opportunity activation time is a time from when the UE receives the activation notification to activate the semi-persistent scheduling opportunity until the semi-persistent scheduling opportunity is deactivated.

Further, when receiving scheduling control information, which is sent by the first base station and used for indicating the one or more downlink assignment information and the corresponding usage relationship of the one or more UEs, after the second base station determines that the channel state of the unlicensed carrier is idle, the first base station indicates, in one scheduling opportunity, that the multiple UEs use different downlink assignment information, respectively; in different scheduling opportunities, the scheduling control information indicates that the same UE uses the same downlink assignment information; in different scheduling opportunities, the scheduling control information indicates that the same UE uses different downlink assignment information; wherein the UE and the downlink assignment information are the UE and the downlink assignment information included in the activation notification.

According to another aspect of the present invention, a data transmission method is provided, which is applied to a multi-carrier scenario, where a first base station controls a first cell, the first base station configures, for a user equipment UE with multi-carrier capability, a second cell controlled by a second base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps: configuring a semi-persistent scheduling opportunity for User Equipment (UE) to indicate the UE to perform data transmission with the second base station at a preset time, wherein the second base station and the UE perform data transmission through an unlicensed carrier; transmitting an activation notification to the UE for activating the semi-persistent scheduling opportunity; wherein, when the first base station and the second base station are different base stations, the first base station sends the activation notification after interacting with the second base station.

Further, configuring the UE with the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time comprises one of: configuring a specific semi-persistent scheduling opportunity of the UE for the UE; configuring a semi-static scheduling opportunity common to cells for all the UEs in the first cell where the UE is located.

Further, the UE specific semi-persistent scheduling opportunity further comprises at least one of the following information: the method comprises the steps of monitoring a semi-static scheduling identifier of a semi-static scheduling notification, a hybrid automatic repeat request (HARQ) process which can be used for semi-static scheduling, automatically deactivating a semi-static scheduling opportunity timer, automatically deactivating a semi-static scheduling opportunity counter and offsetting a semi-static scheduling opportunity period starting point; the semi-persistent scheduling opportunity common to the cells further comprises at least one of the following information: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

Further, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where when the first base station sends the activation notification to each UE respectively, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station; when the first base station sends a common activation notification for activating one or more UEs at one time, the activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, where the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification; when the first base station sends a common activation notification for activating one or more UEs at once, the activation notification includes: the semi-static scheduling identifier of the one or more UE and one or more downlink assignment information used for downlink data transmission between the one or more UE and the second base station, wherein the downlink assignment information includes at least one of a physical resource block, a modulation and coding level and a hybrid automatic repeat request (HARQ) process used for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process for transmitting the uplink data; when the first base station sends a common activation notice for activating one or more UEs at one time, the first base station scrambles the activation notice by using an activation scheduling identifier, wherein the activation scheduling identifier is configured by the first base station when configuring a semi-static scheduling opportunity for the UE or is obtained according to protocol standard specification.

Further, when the first base station sends an activation notification to each UE, the first base station sends the activation notification to each UE by at least one of: scrambling the activation notification by using the cell radio network temporary identifier of each UE, and sending the scrambled activation notification on a Physical Downlink Control Channel (PDCCH); scrambling the activation notification by using the semi-static scheduling identifier of each UE, and sending the scrambled activation notification on a Physical Downlink Control Channel (PDCCH); when the first base station sends a common activation notice for activating one or more UEs at once, the first base station scrambles the activation notice by an activation scheduling identification, wherein the activation scheduling identification is configured by the first base station when configuring a semi-static scheduling opportunity or obtained according to protocol standard regulation.

Further, after sending the activation notification to the UE, the method further includes: receiving a message which is sent by the UE and used for indicating that the channel state of the unauthorized carrier is busy; notifying the second base station of the message.

Further, after configuring a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with the second base station at a preset time for a User Equipment (UE), before sending the activation notification for activating the semi-persistent scheduling opportunity to the UE, the method further comprises receiving request information sent by the UE for requesting activation of the semi-persistent scheduling opportunity; and notifying the request information to the second base station.

According to another aspect of the present invention, a data transmission method is provided, which is applied to a multi-carrier scenario, where a second base station controls a second cell, the second cell is configured to a user equipment UE with multi-carrier capability by a first base station through a first cell controlled by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps: receiving uplink data sent by User Equipment (UE) after a semi-static scheduling opportunity for indicating the UE to perform data transmission with a second base station in preset time is activated; and/or sending downlink data to the UE after a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with a second base station at a preset time is activated; wherein the semi-static scheduling opportunity is configured by the first base station; sending, by the first base station, the activation notification to the UE to activate the semi-persistent scheduling opportunity, the activation notification being sent by the first base station after interacting with the second base station when the first base station and the second base station are different base stations; and carrying out data transmission between the second base station and the UE through an unauthorized carrier, wherein the number of the UE is one or more.

Further, the semi-static scheduling opportunity comprises one of: the first base station configures a specific semi-static scheduling opportunity of the UE for the UE; the first base station is a semi-static scheduling opportunity which is configured by all the UE in the first cell where the UE is located and is common to the cells.

Further, the UE specific semi-persistent scheduling opportunity further comprises at least one of the following information: a semi-static scheduling identifier, a hybrid automatic repeat request HARQ process which can be used by semi-static scheduling, an automatic deactivation semi-static scheduling opportunity timer, an automatic deactivation semi-static scheduling opportunity counter and a semi-static scheduling opportunity period starting point offset; the semi-persistent scheduling opportunity common to the cells further comprises at least one of the following information: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

Further, the semi-persistent scheduling opportunity period is less than or equal to a small data traffic burst statistical period transmitted by the UE; and/or the semi-static scheduling opportunity period is less than or equal to a fixed frame period of the device FBE after the monitoring is performed based on the frame structure.

Further, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where when the activation notification is the activation notification sent by the first base station to each UE respectively, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station; when the activation notification is a common activation notification sent by the first base station and used for activating one or more UEs at one time, the common activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs and used for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs and used for transmitting uplink data with the second base station, where the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification; when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the common activation notification comprises: a semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, wherein the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification; wherein, the downlink assignment information includes at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process allocated by the first base station for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation and coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting the uplink data.

Further, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, the receiving the uplink data that is sent by the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes: within the activation time of the semi-persistent scheduling opportunities, directly receiving data sent by the UE on the resources indicated by the uplink authorization information at each semi-persistent scheduling opportunity; detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-static scheduling opportunities, and when the detection result shows that the channel state is idle, directly receiving data sent by the UE on resources indicated by the uplink authorization information at each semi-static scheduling opportunity within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, sending a message of channel busy to the UE.

Further, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, sending downlink data to the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of: detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing the resource indicated by the downlink assignment information to send data to the UE in channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; and when the detection result shows that the channel state is busy, not sending data to the UE at each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time.

Further, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, before receiving uplink data sent by a user equipment UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated and/or sending downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated, the method further includes: receiving, by the first base station, request information for requesting activation of the semi-persistent scheduling opportunity, which is sent by the UE after determining that a channel state of the unlicensed carrier is in an idle state; transmitting, by a first base station, an activation notification for activating the semi-persistent scheduling opportunity to the UE; and/or detecting a channel status of the unlicensed carrier before or after receiving, by the first base station, request information for requesting activation of the semi-persistent scheduling opportunity, which is transmitted by the UE; and when the detection result is that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

Further, when the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, receiving the uplink data sent by the UE after the semi-persistent scheduling opportunity for indicating the UE to perform data transmission with the second base station at a predetermined time is activated includes: within the activation time of the semi-persistent scheduling opportunities, each semi-persistent scheduling opportunity directly receives data sent by the UE on a resource indicated by uplink authorization information correspondingly allocated to the UE in the activation notification; detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result is that the channel state is idle, receiving data sent by the UE on resources indicated by uplink authorization information which is correspondingly allocated to the UE in the activation notification in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, sending a message of channel busy to the UE.

Further, when the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, sending downlink data to the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of: detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result shows that the channel state is idle, transmitting data to the UE in each semi-persistent scheduling opportunity by directly using resources indicated by downlink assignment information correspondingly allocated to the UE in the activation notification within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, transmitting data to the UE by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time.

Further, when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the activation notification includes semi-persistent scheduling identifications of the one or more UEs, and the activation notification further includes downlink assignment information which is respectively allocated to each UE of the one or more UEs and is used for transmitting downlink data with the second base station or uplink authorization information which is respectively allocated to each UE of the one or more UEs and is used for transmitting uplink data with the second base station, the uplink data which is sent by a UE after a semi-persistent scheduling opportunity used for indicating that the UE can perform data transmission with the second base station at a predetermined time is activated and/or the downlink data is sent to the UE after a semi-persistent scheduling opportunity used for indicating that the UE can perform data transmission with the second base station at a predetermined time is activated, further comprising: receiving, by a first base station, request information, which is sent to the first base station by the UE after determining that a channel state of the unlicensed carrier is in an idle state, for requesting activation of the semi-persistent scheduling opportunity; transmitting, by a first base station, an activation notification for activating the semi-persistent scheduling opportunity to the UE; and/or detecting the channel state of the unlicensed carrier before or after receiving request information which is sent by the UE and used for requesting to activate the semi-persistent scheduling opportunity through a first base station; and when the detection result shows that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

Further, when the activation notification is a common activation notification that is sent by the first base station and can be used for activating one or more UEs at a time, the activation notification includes: the semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, where when the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification, sending downlink data to the UE after the semi-persistent scheduling opportunity for indicating the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of: detecting the channel state of the unlicensed carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result indicates that the channel state is idle, directly transmitting data to the UE by using a resource indicated by one of the one or more downlink assignment information included in the activation notification in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, transmitting data to the UE by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time; detecting a channel state of the unlicensed carrier at idle channel detection time within semi-persistent scheduling opportunity activation time, and when a detection result is that the channel state is idle, transmitting scheduling control information used for indicating the one or more downlink assignment information and corresponding usage relations of the one or more UEs to the UEs at each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time, wherein the scheduling control information is used for the UEs to receive data transmitted by the second base station; and sending data to the UE on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information.

Further, when each semi-persistent scheduling opportunity transmits scheduling control information indicating the one or more downlink assignment information and the corresponding usage relationship of the one or more UEs to the UE, in one scheduling opportunity, the scheduling control information indicates that the plurality of UEs use different downlink assignment information respectively; in different scheduling opportunities, the scheduling control information indicates that the same UE uses the same downlink assignment information; in different scheduling opportunities, the scheduling control information indicates that the same UE uses different downlink assignment information; wherein the UE and the downlink assignment information are the UE and the downlink assignment information included in the activation notification.

According to another aspect of the present invention, there is provided a data transmission apparatus, for use in a multi-carrier scenario, wherein a UE has multi-carrier capability, the UE has a capability of communicating with a first cell controlled by a first base station, and the UE also has a capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises: a first receiving module, configured to receive a semi-persistent scheduling opportunity configured by a first base station and used to instruct the UE to perform data transmission with a second base station at a predetermined time, where the second base station and the UE perform data transmission through an unlicensed carrier; a second receiving module, configured to receive an activation notification sent by the first base station and used for activating the semi-persistent scheduling opportunity, where, when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after interaction between the first base station and the second base station; and the transmission module is used for carrying out data transmission with the second base station according to the activation notification.

According to another aspect of the present invention, there is provided a data transmission apparatus, which is applied to a multi-carrier scenario, where a first base station controls a first cell, the first base station configures, for a user equipment UE with multi-carrier capability, a second cell controlled by a second base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises: a configuration module, configured to configure a semi-persistent scheduling opportunity for a user equipment UE, where the semi-persistent scheduling opportunity is used to instruct the UE to perform data transmission with the second base station at a predetermined time, and the second base station and the UE perform data transmission through an unlicensed carrier; a first sending module, configured to send an activation notification for activating the semi-persistent scheduling opportunity to the UE; wherein, when the first base station and the second base station are different base stations, the first base station sends the activation notification after interacting with the second base station.

According to another aspect of the present invention, a data transmission apparatus is provided, which is applied to a multi-carrier scenario, where a second base station controls a second cell, the second cell is configured to a user equipment UE with multi-carrier capability by a first cell controlled by a first base station through the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises: a third receiving module, configured to receive uplink data sent by a UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with a second base station at a predetermined time is activated; and/or a second sending module, configured to send downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with a second base station at a predetermined time is activated; wherein the semi-static scheduling opportunity is configured by the first base station; sending, by the first base station, the activation notification to the UE to activate the semi-persistent scheduling opportunity, the activation notification being sent by the first base station after interacting with the second base station when the first base station and the second base station are different base stations; and carrying out data transmission between the second base station and the UE through an unauthorized carrier, wherein the number of the UE is one or more.

According to the invention, a semi-static scheduling opportunity which is configured by a first base station and used for indicating the UE to perform data transmission with a second base station in a preset time is received, wherein the second base station and the UE perform data transmission through the unauthorized carrier; receiving an activation notification sent by the first base station for activating the semi-persistent scheduling opportunity, wherein when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after interaction between the first base station and the second base station; and performing data transmission with the second base station according to the activation notification, so that the problem of interference generated during data transmission on an unauthorized carrier in the related art is solved, and the effect of reducing the interference of data transmission on the unauthorized carrier is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a first data transmission method according to an embodiment of the present invention;

FIG. 2 is a flow chart of a second method of data transmission according to an embodiment of the present invention;

FIG. 3 is a flow chart of a third method of data transmission according to an embodiment of the present invention;

fig. 4 is a block diagram of a first data transmission apparatus according to an embodiment of the present invention;

fig. 5 is a block diagram of a second data transmission apparatus according to an embodiment of the present invention;

fig. 6 is a block diagram of a third data transmission apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a network topology according to an embodiment of the present method;

FIG. 8 is a schematic diagram of another network topology according to an embodiment of the present invention;

FIG. 9 is a timing diagram of an FBE according to an embodiment of the invention;

FIG. 10 is a timing diagram of an LBE according to an embodiment of the present invention;

fig. 11 is a flowchart of a first method implementation of a method for using unlicensed frequency scheduling according to an embodiment of the present invention;

fig. 12 is a flowchart of a second method implementation of a method for using unlicensed frequency scheduling according to an embodiment of the present invention;

fig. 13 is a flowchart of a third method implementation of a method for using unlicensed frequency scheduling according to an embodiment of the present invention;

fig. 14 is a flowchart of a method for scheduling usage of an unlicensed carrier according to a first embodiment of the present invention;

FIG. 15 is a diagram illustrating a semi-persistent scheduling opportunity configuration configured by an M-eNB for a UE1 and a UE2 according to an embodiment of the present invention;

fig. 16 is a flowchart of a method for scheduling usage of an unlicensed carrier according to a second embodiment of the present invention;

fig. 17 is a diagram of a semi-persistent scheduling opportunity configuration shared by cells configured by an L-eNB in two according to an embodiment of the present invention;

fig. 18 is a flowchart of a method for scheduling usage of an unlicensed carrier according to a third embodiment of the present invention;

fig. 19 is a flowchart of a method for scheduling usage of an unlicensed carrier according to a fourth embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In this embodiment, a data transmission method is provided, where the method is applied to a multi-carrier scenario, where a UE has multi-carrier capability, the UE has a capability of communicating with a first cell controlled by a first base station, and the UE also has a capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station may be the same or different. Fig. 1 is a flowchart of a first data transmission method according to an embodiment of the present invention, and as shown in fig. 1, the flowchart includes the following steps:

step S102, receiving a semi-persistent scheduling opportunity configured by a first base station and used for indicating the UE to perform data transmission with a second base station in a preset time, wherein the second base station and the UE perform data transmission through an unlicensed carrier;

step S104, receiving an activation notification sent by a first base station for activating a semi-persistent scheduling opportunity, wherein when the first base station and a second base station are different base stations, the activation notification is sent by the first base station after the interaction between the first base station and the second base station;

and step S106, carrying out data transmission with the second base station according to the activation notice.

Through the steps, the semi-persistent scheduling opportunity configured by the first base station and used for indicating the UE to perform data transmission with the second base station in the preset time is received, and after the semi-persistent scheduling opportunity is activated, the UE performs data transmission with the second base station, and the semi-persistent scheduling opportunity is used for identifying that the UE can perform data transmission with the second base station in the preset time, so that the interference of data transmission on the unauthorized carrier wave can be effectively reduced, the problem that the interference is generated when the data transmission is performed on the unauthorized carrier wave in the related technology is solved, and the effect of reducing the interference of the data transmission on the unauthorized carrier wave is further achieved.

In an optional embodiment, receiving a semi-persistent scheduling opportunity configured by a first base station for instructing a UE to perform data transmission with a second base station at a predetermined time comprises: receiving a specific semi-static scheduling opportunity of the UE configured for the UE by the first base station; and receiving a semi-static scheduling opportunity which is configured by the first base station for all the UE in the first cell in which the UE is positioned and is common to the cells.

The specific semi-persistent scheduling opportunity of the UE and the semi-persistent scheduling opportunity common to the cell both include a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter.

In an optional embodiment, the UE specific semi-persistent scheduling opportunity may further include, in addition to the information, at least one of the following information: the method comprises the steps of identifying semi-static scheduling, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatically deactivating a semi-static scheduling opportunity timer, automatically deactivating a semi-static scheduling opportunity counter and offsetting a semi-static scheduling opportunity period starting point. The semi-persistent scheduling opportunity common to the cells includes at least one of the following information in addition to the semi-persistent scheduling opportunity period or semi-persistent scheduling subframe bitmap parameter: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

The semi-static scheduling opportunity period is less than or equal to a small data service burst statistical period transmitted by the UE; and/or the semi-static scheduling opportunity period is less than or equal to a fixed frame period of performing the first listening and then using the device FBE based on the frame structure.

In an optional embodiment, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where when the UE receives the activation notification sent by the first base station to each UE respectively, the activation notification may include: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink authorization information for transmitting uplink data between the UE and the second base station; when the UE receives a common activation notification sent by a first base station to one or more UEs, the common activation notification includes semi-static scheduling identifiers of the one or more UEs, and the common activation notification also includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with a second base station or uplink authorization information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station; after receiving a common activation notification, the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity; when the UE receives a common activation notification sent by the first base station to one or more UEs, the common activation notification includes: the UE scheduling method comprises the steps of semi-static scheduling identifications of one or more UEs and one or more downlink assignment information used for downlink data transmission between the one or more UEs and a second base station, wherein the UE indicated by the semi-static scheduling identifications activates semi-static scheduling opportunities after receiving a common activation notification; the downlink assignment information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting uplink data; when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the UE monitors and receives the activation notification in a common search space of a Physical Downlink Control Channel (PDCCH) of the first base station by using an activation scheduling identifier, wherein the activation scheduling identifier is obtained from received semi-static scheduling opportunities or is obtained according to the specification of a protocol standard.

In an optional embodiment, after receiving the activation notification respectively sent by the first base station to each UE, the UE performs data transmission with the second base station according to the activation notification, where the data transmission includes at least one of: detecting the channel state of the unauthorized carrier at the idle channel detection time within the activation time of the semi-static scheduling opportunity, and directly utilizing the resource indicated by the uplink authorization information to send data to the second base station at each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time when the detection result is that the channel state is idle; when the detection result is that the channel state is busy, transmitting data to the second base station by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time; within the activation time of the semi-static scheduling opportunities, directly receiving data sent by the second base station on the resources indicated by the downlink assignment information at each semi-static scheduling opportunity; detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-static scheduling opportunity, and when the detection result is that the channel state is idle, directly receiving data sent by the second base station on resources indicated by the downlink assignment information at each semi-static scheduling opportunity within the occupied time of the channel after the idle channel detection time; when the detection result is that the channel state is busy, sending a message that the channel is busy to the first base station, wherein when the first base station and the second base station are different base stations, the message that the channel is busy is sent to the second base station through the first base station; the semi-persistent scheduling opportunity activation time refers to a time from the time when the UE receives the activation notification to activate the semi-persistent scheduling opportunity to the time when the semi-persistent scheduling opportunity is deactivated.

Before the UE receives the activation notification respectively sent by the first base station to each UE, the method further includes: detecting the channel state of the unauthorized carrier at the idle channel detection time; and when the detection result is that the channel state is idle, sending request information for requesting activation of the semi-static scheduling opportunity to the first base station, wherein when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

In an optional embodiment, when the UE receives a common activation notification sent by the first base station to the one or more UEs, and the common activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, the data transmission with the second base station according to the activation notification includes at least one of the following: detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-persistent scheduling opportunity, and directly transmitting data to the second base station in each semi-persistent scheduling opportunity by using resources corresponding to the uplink authorization information indication allocated to the UE in the common activation notification within the occupied time of the channel after the idle channel detection time when the detection result is that the channel state is idle; when the detection result is that the channel state is busy, each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time sends data to the second base station; within the activation time of the semi-static scheduling opportunities, directly receiving data sent by the second base station on resources corresponding to the downlink assignment information indication allocated to the UE at each semi-static scheduling opportunity; detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of the semi-static scheduling opportunity, and when the detection result is that the channel state is idle, receiving data sent by a second base station on resources indicated by downlink assignment information which is correspondingly allocated to the UE in activation notification directly by each semi-static scheduling opportunity within channel occupation time after the idle channel detection time; when the detection result is that the channel state is busy, sending a message that the channel is busy to the first base station, wherein when the first base station and the second base station are different base stations, the message that the channel is busy is sent to the second base station through the first base station; the semi-persistent scheduling opportunity activation time refers to a time from the time when the UE receives the activation notification to activate the semi-persistent scheduling opportunity to the time when the semi-persistent scheduling opportunity is deactivated.

Before the UE receives a common activation notification sent by a first base station to one or more UEs, where the common activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with a second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, the method further includes: detecting a channel state of an unlicensed carrier; and when the detection result is that the channel state is idle, sending request information for requesting activation of the semi-static scheduling opportunity to the first base station, wherein when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

In an optional embodiment, after the UE receives a common activation notification allocated by the first base station for one or more UEs, the common activation notification includes: the method comprises the following steps that semi-static scheduling identifications of one or more UE (user equipment) and one or more downlink assignment information used for downlink data transmission between the one or more UE and a second base station, wherein when the UE indicated by the semi-static scheduling identifications activates semi-static scheduling opportunities after receiving a common activation notification, the data transmission with the second base station according to the activation notification comprises at least one of the following steps: within the activation time of the semi-static scheduling opportunities, receiving data sent by the second base station on resources indicated by one or more pieces of downlink assignment information contained in the activation notification at each semi-static scheduling opportunity; detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and when the detection result is that the channel state is idle, receiving data sent by a second base station in each semi-static scheduling opportunity directly on resources indicated by one or more downlink assignment information contained in a common activation notification within channel occupation time after the idle channel detection time; when the detection result is that the channel state is busy, sending a message that the channel is busy to the first base station, wherein when the first base station and the second base station are different base stations, the message that the channel is busy is sent to the second base station through the first base station; receiving scheduling control information which is sent by a first base station and used for indicating corresponding use relations of one or more downlink assignment information and one or more UE (user equipment) after the first base station determines that the channel state of an unauthorized carrier is idle at a second base station; directly receiving data sent by the second base station on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information; detecting the channel state of an unauthorized carrier within the activation time of a semi-static scheduling opportunity, and directly receiving data sent by a second base station on a resource indicated by downlink assignment information corresponding to UE (user equipment) indicated by scheduling control information sent by a first base station after the first base station determines that the channel state of the unauthorized carrier is idle when the detection result indicates that the channel state is idle, wherein the scheduling control information is used for indicating the corresponding use relationship between one or more downlink assignment information and one or more UE; when the detection result is that the channel state is busy, sending a message that the channel is busy to the first base station, wherein when the first base station and the second base station are different base stations, the message that the channel is busy is sent to the second base station through the first base station; the semi-persistent scheduling opportunity activation time refers to a time from the time when the UE receives the activation notification to activate the semi-persistent scheduling opportunity to the time when the semi-persistent scheduling opportunity is deactivated.

When receiving scheduling control information which is sent by a first base station and used for indicating corresponding use relations of one or more pieces of downlink assignment information and one or more pieces of UE after the second base station determines that the channel state of an unlicensed carrier is idle, in one scheduling opportunity, the scheduling control information indicates the plurality of pieces of UE to respectively use different pieces of downlink assignment information; in different scheduling opportunities, the scheduling control information indicates the same UE to use the same downlink assignment information; in different scheduling opportunities, the scheduling control information indicates that the same UE uses different downlink assignment information; the UE and the downlink assignment information are UE and downlink assignment information contained in the activation notification.

Fig. 2 is a flowchart of a second method for data transmission according to an embodiment of the present invention, which is applied to a multi-carrier scenario, where a first base station controls a first cell, the first base station configures a second cell controlled by a second base station for a UE with multi-carrier capability, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station may be the same or different. As shown in fig. 2, the method comprises the steps of:

step S202, configuring a semi-persistent scheduling opportunity for indicating UE to perform data transmission with a second base station in preset time for User Equipment (UE), wherein the second base station and the UE perform data transmission through an unauthorized carrier;

step S204, sending an activation notice for activating the semi-persistent scheduling opportunity to the UE; and when the first base station and the second base station are different base stations, the first base station sends an activation notification after interacting with the second base station.

Through the steps, a semi-static scheduling opportunity used for indicating the UE to perform data transmission with the second base station at the preset time is configured for the UE, and after the semi-static scheduling opportunity is activated, the UE performs data transmission with the second base station, and the semi-static scheduling opportunity is used for identifying that the UE can perform data transmission with the second base station at the preset time, so that the interference of data transmission on the unauthorized carrier wave can be effectively reduced, the problem that the interference is generated when the data transmission is performed on the unauthorized carrier wave in the related technology is solved, and the effect of reducing the interference of the data transmission on the unauthorized carrier wave is further achieved.

In an optional embodiment, configuring a semi-persistent scheduling opportunity for the UE to instruct the UE to perform data transmission with the second base station at a predetermined time includes one of: configuring a specific semi-static scheduling opportunity of the UE for the UE; and configuring a semi-static scheduling opportunity common to the cells for all the UE in the first cell where the UE is located.

The specific semi-persistent scheduling opportunity of the UE and the semi-persistent scheduling opportunity common to the cells both comprise semi-persistent scheduling opportunity periods or semi-persistent scheduling subframe bitmap parameters.

The UE specific semi-persistent scheduling opportunity may include other information besides the above information, and in an optional embodiment, the UE specific semi-persistent scheduling opportunity may further include at least one of the following information: the method comprises the steps of monitoring a semi-static scheduling identifier of a semi-static scheduling notification, a hybrid automatic repeat request (HARQ) process which can be used for semi-static scheduling, automatically deactivating a semi-static scheduling opportunity timer, automatically deactivating a semi-static scheduling opportunity counter and offsetting a semi-static scheduling opportunity period starting point; the semi-persistent scheduling opportunity common to the cells may include at least one of the following information in addition to the semi-persistent scheduling opportunity period or the semi-persistent scheduling subframe bitmap parameter: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

The semi-static scheduling opportunity period is less than or equal to a small data service burst statistical period transmitted by the UE; and/or the semi-static scheduling opportunity period is less than or equal to a fixed frame period of performing listen before use of the device FBE based on the frame structure.

In an optional embodiment, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where when the first base station sends the activation notification to each UE respectively, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink authorization information for transmitting uplink data between the UE and the second base station; when a first base station sends a common activation notification for activating one or more UEs at one time, the activation notification includes semi-static scheduling identifiers of the one or more UEs, the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with a second base station or uplink authorization information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, wherein the UE indicated by the semi-static scheduling identifiers activates semi-static scheduling opportunities after receiving the common activation notification; when the first base station sends a common activation notification for activating one or more UEs at once, the activation notification includes: the method comprises the steps of identifying semi-static scheduling identifications of one or more UE (user equipment) and one or more downlink assignment information used for downlink data transmission between the one or more UE and a second base station, wherein the downlink assignment information comprises at least one of a physical resource block, a modulation and coding grade and a hybrid automatic repeat request (HARQ) process used for transmitting downlink data; the uplink authorization information comprises at least one of a physical resource block for transmitting uplink data, a modulation coding level and a hybrid automatic repeat request (HARQ) process; when the first base station sends a common activation notice for activating one or more UEs at one time, the first base station scrambles the activation notice by using an activation scheduling identifier, wherein the activation scheduling identifier is configured by the first base station when configuring a semi-static scheduling opportunity for the UE or is obtained according to the protocol standard specification.

In an optional embodiment, when the first base station sends the activation notification to each UE separately, the first base station sends the activation notification to each UE by at least one of the following methods: scrambling an activation notice by using a cell radio network temporary identifier of each UE, and sending the scrambled activation notice on a Physical Downlink Control Channel (PDCCH); scrambling an activation notice by using a semi-static scheduling identifier of each UE, and sending the scrambled activation notice on a Physical Downlink Control Channel (PDCCH); when the first base station sends a common activation notice for activating one or more UEs at one time, the first base station scrambles the activation notice by using an activation scheduling identifier, wherein the activation scheduling identifier is configured by the first base station when configuring the semi-static scheduling opportunity or is obtained according to the protocol standard specification.

Wherein, after sending the activation notification to the UE, the method further includes: receiving a message which is sent by UE and used for indicating that the channel state of an unauthorized carrier is busy; the second base station is notified of the message.

After configuring a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with a second base station at a preset time for the user equipment UE, before sending an activation notification for activating the semi-persistent scheduling opportunity to the UE, the method further comprises receiving request information for requesting to activate the semi-persistent scheduling opportunity, which is sent by the UE; and informing the second base station of the request information.

Fig. 3 is a flowchart of a third data transmission method according to an embodiment of the present invention, which is applied to a multi-carrier scenario, where a second base station controls a second cell, and the second cell is configured to a user equipment UE with multi-carrier capability by a first cell controlled by a first base station, where the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station may be the same or different. As shown in fig. 3, the process includes the following steps:

step S302, receiving uplink data sent by user equipment UE after a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with a second base station in a preset time is activated; and/or sending downlink data to the UE after a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with the second base station in a preset time is activated; wherein the semi-persistent scheduling opportunity is configured by the first base station; the method comprises the steps that a first base station sends an activation notification to UE to activate a semi-persistent scheduling opportunity, and when the first base station and a second base station are different base stations, the activation notification is sent by the first base station after interaction with the second base station; and data transmission is carried out between the second base station and the UE through the unlicensed carrier, and the number of the UE is one or more.

Through the steps, after the semi-static scheduling opportunity configured for the UE is activated, data transmission is carried out between the UE and the UE, and the semi-static scheduling opportunity is used for identifying that the UE can carry out data transmission with the second base station in preset time, so that the interference of data transmission on the unauthorized carrier wave can be effectively reduced, the problem that the interference is generated when data transmission is carried out on the unauthorized carrier wave in the related technology is solved, and the effect of reducing the interference of data transmission on the unauthorized carrier wave is further achieved.

The semi-persistent scheduling opportunity may include one of the following: a first base station configures a specific semi-static scheduling opportunity of the UE for the UE; the first base station is a semi-static scheduling opportunity which is configured by all UE in a first cell where the UE is located and is common to the cells.

The UE specific semi-persistent scheduling opportunity and the cell common semi-persistent scheduling opportunity may further include other information in addition to the above information, and in an optional embodiment, the UE specific semi-persistent scheduling opportunity may further include at least one of the following information: a semi-static scheduling identifier, a hybrid automatic repeat request HARQ process which can be used by semi-static scheduling, an automatic deactivation semi-static scheduling opportunity timer, an automatic deactivation semi-static scheduling opportunity counter and a semi-static scheduling opportunity period starting point offset; the semi-persistent scheduling opportunity common to the cells may further include at least one of the following information: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

The semi-static scheduling opportunity period is less than or equal to a small data service burst statistical period transmitted by the UE; and/or the semi-static scheduling opportunity period is less than or equal to the fixed frame period of the device FBE after the monitoring is performed based on the frame structure.

In an optional embodiment, the activation notification includes an activation notification sent by the first base station to each UE respectively or a common activation notification sent by the first base station for activating one or more UEs at a time, where, when the activation notification is an activation notification sent by the first base station to each UE respectively, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink authorization information for transmitting uplink data between the UE and the second base station; when the activation notification is a common activation notification sent by a first base station and used for activating one or more UEs at one time, the common activation notification includes semi-static scheduling identifiers of the one or more UEs, and the common activation notification also includes downlink assignment information respectively allocated to each UE of the one or more UEs and used for transmitting downlink data with a second base station or uplink authorization information respectively allocated to each UE of the one or more UEs and used for transmitting uplink data with the second base station, wherein the UE indicated by the semi-static scheduling identifiers activates semi-static scheduling opportunities after receiving the common activation notification; when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the common activation notification comprises the following steps: the UE scheduling method comprises the steps of semi-static scheduling identifications of one or more UEs and one or more downlink assignment information used for downlink data transmission between the one or more UEs and a second base station, wherein the UE indicated by the semi-static scheduling identifications activates semi-static scheduling opportunities after receiving a common activation notification; the downlink assignment information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting uplink data.

In an optional embodiment, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, the receiving uplink data that the UE sends after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes: within the activation time of the semi-static scheduling opportunities, directly receiving data sent by the UE on resources indicated by the uplink authorization information at each semi-static scheduling opportunity; detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-static scheduling opportunity, and directly receiving data sent by the UE on resources indicated by uplink authorization information at each semi-static scheduling opportunity within channel occupation time after the idle channel detection time when the detection result is that the channel state is idle; and when the detection result is that the channel state is busy, sending a message that the channel is busy to the UE.

In an optional embodiment, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, sending downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of: detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-static scheduling opportunity, and directly transmitting data to the UE by using the resource indicated by the downlink assignment information within the occupied time of the channel after the idle channel detection time when the detection result is that the channel state is idle; and when the detection result is that the channel state is busy, not sending data to the UE at each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time.

In an optional embodiment, when the activation notification is an activation notification that is respectively sent by the first base station to each UE, before receiving uplink data sent by the user equipment UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated and/or sending downlink data to the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated, the method further includes: receiving, by a first base station, request information for requesting activation of a semi-persistent scheduling opportunity, which is sent by a UE after determining that a channel state of an unlicensed carrier is in an idle state; transmitting, by a first base station, an activation notification for activating a semi-persistent scheduling opportunity to a UE; and/or detecting a channel state of the unlicensed carrier before or after receiving, by the first base station, request information for requesting activation of a semi-persistent scheduling opportunity, which is transmitted by the UE; and when the detection result is that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

In an optional embodiment, when the activation notification is a common activation notification sent by the first base station and available for activating the one or more UEs at a time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, receiving the uplink data sent by the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes: within the activation time of the semi-static scheduling opportunities, each semi-static scheduling opportunity directly receives data sent by the UE on resources indicated by uplink authorization information correspondingly allocated to the UE in the activation notification; detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-static scheduling opportunity, and when the detection result is that the channel state is idle, receiving data sent by the UE on resources indicated by uplink authorization information which are correspondingly allocated to the UE in the activation notification directly at each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time; and when the detection result is that the channel state is busy, sending a message that the channel is busy to the UE.

In an optional embodiment, when the activation notification is a common activation notification sent by the first base station and available for activating the one or more UEs at a time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, sending the downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of: detecting the channel state of the unauthorized carrier in idle channel detection time within the activation time of the semi-static scheduling opportunity, and when the detection result is that the channel state is idle, directly transmitting data to the UE by using the resource indicated by the downlink assignment information correspondingly allocated to the UE in the activation notification in each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time; and when the detection result is that the channel state is busy, transmitting data to the UE by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time.

In an optional embodiment, when the activation notification is a common activation notification sent by the first base station and available for activating the one or more UEs at one time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station, before receiving uplink data sent by the user equipment UE after a semi-persistent scheduling opportunity indicating that the UE can perform data transmission with the second base station at a predetermined time is activated and/or before sending downlink data to the UE after a semi-persistent scheduling opportunity indicating that the UE can perform data transmission with the second base station at a predetermined time is activated, further comprising: receiving request information which is sent to a first base station by UE after determining that a channel state of an unauthorized carrier is in an idle state and is used for requesting activation of a semi-static scheduling opportunity; transmitting, by a first base station, an activation notification for activating a semi-persistent scheduling opportunity to a UE; and/or detecting the channel state of the unlicensed carrier before or after receiving request information which is sent by the UE and used for requesting to activate the semi-persistent scheduling opportunity through the first base station; and when the detection result is that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

In an optional embodiment, when the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, the activation notification includes: the method comprises the following steps that semi-static scheduling identifications of one or more UE (user equipment) and one or more downlink assignment information used for downlink data transmission between the one or more UE and a second base station, wherein when the UE indicated by the semi-static scheduling identifications activates semi-static scheduling opportunities after receiving a common activation notification, the UE sends downlink data to the UE after the semi-static scheduling opportunities used for indicating the UE to perform data transmission with the second base station at a preset time are activated, and the UE comprises at least one of the following steps: detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of the semi-static scheduling opportunity, and when the detection result is that the channel state is idle, directly utilizing the resource indicated by one downlink assignment information in one or more downlink assignment information contained in the activation notification to send data to the UE in the channel occupation time after the idle channel detection time at each semi-static scheduling opportunity; when the detection result is that the channel state is busy, each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time sends data to the UE; detecting the channel state of an unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and when the detection result is that the channel state is idle, transmitting scheduling control information used for indicating one or more downlink assignment information and corresponding use relations of one or more UE to the UE in each semi-static scheduling opportunity within channel occupation time after the idle channel detection time, wherein the scheduling control information is used for the UE to receive data transmitted by a second base station; and sending data to the UE on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information.

When each semi-static scheduling opportunity sends scheduling control information used for indicating one or more downlink assignment information and corresponding use relations of one or more UE to the UE, in one scheduling opportunity, the scheduling control information indicates that the UE uses different downlink assignment information respectively; in different scheduling opportunities, the scheduling control information indicates the same UE to use the same downlink assignment information; in different scheduling opportunities, the scheduling control information indicates that the same UE uses different downlink assignment information; the UE and the downlink assignment information are UE and downlink assignment information contained in the activation notification.

In this embodiment, a data transmission device is further provided, and the data transmission device is used to implement the foregoing embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 4 is a block diagram of a first data transmission apparatus according to an embodiment of the present invention, which is applied to a multi-carrier scenario, where a user equipment UE has multi-carrier capability, the UE has a capability of communicating with a first cell controlled by a first base station, and the UE also has a capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station may be the same or different. As shown in fig. 4, the apparatus includes a first receiving module 42, a second receiving module 44, and a transmitting module 46, which will be described below.

A first receiving module 42, configured to receive a semi-persistent scheduling opportunity configured by a first base station and used to instruct a UE to perform data transmission with a second base station at a predetermined time, where the second base station and the UE perform data transmission through an unlicensed carrier; a second receiving module 44, connected to the first receiving module 42, configured to receive an activation notification sent by the first base station for activating the semi-persistent scheduling opportunity, where, when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after the interaction between the first base station and the second base station; and a transmission module 46, connected to the second receiving module 44, for performing data transmission with the second base station according to the activation notification.

Before the UE receives the activation notification respectively sent by the first base station to each UE, the method further includes: detecting the channel state of the unauthorized carrier at the idle channel detection time; when the detection result is that the channel state is idle, sending request information for requesting to activate the semi-static scheduling opportunity to the second base station to the first base station; when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

Fig. 5 is a block diagram of a second data transmission apparatus according to an embodiment of the present invention, which is applied to a multi-carrier scenario, where a first base station controls a first cell, the first base station configures a second cell controlled by a second base station for a UE with multi-carrier capability, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and as shown in fig. 5, the apparatus includes a configuration module 52 and a first transmission module 54, which will be described below.

A configuration module 52, configured to configure a semi-persistent scheduling opportunity for a user equipment UE, where the semi-persistent scheduling opportunity is used to instruct the UE to perform data transmission with a second base station at a predetermined time, and the second base station and the UE perform data transmission through an unlicensed carrier; a first sending module 54, connected to the configuration module 52, for sending an activation notification for activating a semi-persistent scheduling opportunity to the UE; wherein, when the first base station and the second base station are different base stations, the first base station sends the activation notification after interacting with the second base station.

Fig. 6 is a block diagram of a third data transmission apparatus according to an embodiment of the present invention, which is applied to a multi-carrier scenario, where a second base station controls a second cell, and the second cell is configured to a user equipment UE with multi-carrier capability by a first cell controlled by a first base station, where the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station may be the same or different. As shown in fig. 6, the apparatus includes a third receiving module 62 and/or a second transmitting module 64, which will be described below.

A third receiving module 62, configured to receive uplink data sent by the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated; a second sending module 64, configured to send downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated; wherein the semi-persistent scheduling opportunity is configured by the first base station; the method comprises the steps that a first base station sends an activation notification to UE to activate a semi-persistent scheduling opportunity, and when the first base station and a second base station are different base stations, the activation notification is sent by the first base station after interaction with the second base station; and data transmission is carried out between the second base station and the UE through the unlicensed carrier, and the number of the UE is one or more.

The technical solution of the present invention will be described in more detail with reference to specific examples.

It should be noted that, if not conflicting, the embodiments of the present invention and the features of the embodiments may be combined with each other within the scope of protection of the present invention. Additionally, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

It should be further noted that the embodiments in the embodiments of the present invention are only used to illustrate the method for scheduling and using the unlicensed frequency proposed by the present invention. In the embodiments of the present invention, small cells using unlicensed frequencies in an LTE system are taken as examples, and these small cells are implemented by deploying Low Power Node (LPN for short), but the application scope of the method for scheduling and using unlicensed frequencies provided by the present invention is not limited, and it can be understood that the scheme provided by the embodiments of the present invention may be applied to other types of cells in the LTE system, such as a macro cell; but also to cells of various types using other conventional wireless communication technologies, such as UMTS and the like.

The unlicensed frequency can be freely used by any organization or person by adopting any wireless communication technology without authorization, so that relative to the licensed frequency, when the unlicensed frequency is used, it cannot be ensured that free unlicensed frequency resources are available at any time and any place. In the present embodiment, the frequency and the carrier are the same concept and may be used interchangeably.

In this embodiment, a Radio Resource Control (RRC) connection is initially established between a ue and a first base station in a cell, where the cell is controlled by the first base station, a carrier used by the cell is a first carrier (primary carrier) of the ue, the cell is a first cell (primary cell, Pcell) of the ue, and the first carrier is an authorized frequency. For the first carrier, the ue establishes an RRC connection with the first base station in the cell using the first carrier until the ue disconnects the RRC connection with the first base station or the ue changes the first carrier, and when data transmission is needed, the ue and the first base station may monopolize part or all of radio resources on the first carrier for transmitting data to be transmitted between each other. When the first base station determines to add additional frequency resources to the user equipment according to one or more of the factors such as the service requirement, the load condition of the first cell, the operator policy and the like, the first base station configures a second cell (secondary cell, Scell) for the user equipment through the first cell, the carrier used by the second cell is a second carrier (secondary carrier), and the second carrier is an unlicensed frequency. The second cell may be controlled by the first base station, or may also be controlled by the second base station, or may be cooperatively controlled by the first base station and the second base station, and the first base station and the second base station exchange information through an interface therebetween.

Fig. 7 is a schematic diagram of a network topology according to an embodiment of the present invention, in fig. 7, an M-eNB is a macro base station, and a macrocell cell1 is deployed using a licensed frequency F1. The L-eNB1 and the L-eNB2 are low power nodes, both support unlicensed frequency F2, cell coverage of cell2 and cell3 in the drawing can be respectively realized by using unlicensed frequency F2, and both the L-eNB1 and the L-eNB2 are connected to the M-eNB through interfaces, such as Line1 and Line2 shown in fig. 7. In addition, two WLAN Access points (Access points, referred to as APs for short) are deployed in fig. 7, the AP1 and the AP2 both support the unlicensed frequency F2, and the coverage of the Point-filled oval area in the diagram can be achieved by using the unlicensed frequency F2. In fig. 7, the L-eNB1 and the AP1 are in the coverage area of each other, and the L-eNB1 and the AP1 may listen to each other. Here, the mutual listening means that the rf transmission signal of the L-eNB1 can be received by the rf receiving device of the AP1, or means that the rf transmission signal of the L-eNB1 can be received by the rf receiving device of the AP1 and the received signal strength/signal quality of the L-eNB1 is better than the preset value, and vice versa.

Fig. 8 is another schematic diagram of a network topology according to an embodiment of the present invention, in fig. 8, L-eNB1 and L-eNB2 are low power nodes, both support licensed frequency F1 and unlicensed frequency F2, cell coverage of cell3 and cell1 in the drawing is achieved by using licensed frequency F1, and cell coverage of cell4 and cell2 in fig. 8 is achieved by using unlicensed frequency F2. Similarly, two WLAN APs, AP1 and AP2, are deployed in fig. 8, both supporting unlicensed frequency F2, and coverage of the point-filled oval area in the figure can be achieved using unlicensed frequency F2. In fig. 8, the L-eNB1 and the AP1 are in the coverage area of each other, and the L-eNB1 and the AP1 may listen to each other.

Unlicensed frequencies can be used for free without authorization, so that at the same place and at the same time, more than one device may try to use the same unlicensed frequency, the devices may use the same or different wireless communication technologies, belong to the same or different owners, and in order to ensure efficient and fair use of the unlicensed frequency among the devices, many countries and regions have regulatory requirements on how to use the unlicensed frequency, for example, in regions such as europe, japan, and the like, any device wants to use the unlicensed frequency, must perform listen before use (LBT) operation, that is, before initiating data transmission, detect that a Channel is busy and idle by Clear Channel Assessment (CCA), that is, detect whether the Channel is used by other users, and in case of determining that the Channel is not used by other users, the data transmission is performed. Here, channel and frequency or carrier are the same concept and are used interchangeably.

Taking europe as an example, the European Telecommunications Standardization Institute (ETSI) has made a uniform usage requirement (regulatory requirement) for an unauthorized frequency, and a device using the unauthorized frequency needs to perform an LBT operation, and specifically, a device performing the LBT operation (here, the LBT is implemented by performing CCA) using the unauthorized frequency may be classified into the following two types, a device performing the LBT Based on a Frame structure (Frame Based Equipment, FBE for short) and a device performing the LBT Based on a Load (Load Based Equipment, LBE for short).

The FBE periodically listens to and uses the unlicensed frequency in a fixed frame period, when a device transmits (transmissions) on an unlicensed channel, it must first evaluate whether the channel is idle (CCA detection) by detecting the energy of the channel, if the detected energy on the channel exceeds a specified threshold, the channel is considered to be occupied by other devices, and the device does not transmit on the channel in the next fixed frame period; otherwise, the channel is considered idle and the device can transmit directly on the channel. The fixed frame Period includes a Channel Occupancy Time (Channel Occupancy Time) and an Idle Time (Idle Period), wherein a tail-most portion of the Idle Time is a Clear Channel Assessment (CCA) Time, for example, the CCA Time is 20 us. Fig. 9 is a timing diagram of an FBE according to an embodiment of the present invention, taking fig. 9 as an example, the fixed frame period 910 includes a channel occupation time 911 and an idle time 912, and the last part of the idle time 912 is an idle channel estimation time 913. Assuming that a device a occupies an unlicensed channel X for a channel occupancy time 911, after the channel occupancy time 911 is over, the device a must stop transmitting on the channel X for at least an idle time 912. If the device a needs to transmit on the channel X after the channel occupation time 911, the device a performs CCA detection on the channel X within a CCA time before the end of the idle time 912 at least stopping transmitting on the channel X, if the detection result is that the channel is idle, the device a may perform transmission on the channel X for the duration of the channel occupation time 921 in the next fixed frame period 920, otherwise, if the detection result is that the channel is already occupied by other devices, the device a does not perform transmission on the channel X in the next fixed frame period 920. The specific parameters of the occupied time of the channel, the idle time and the like are specified by the regulation requirement.

Unlike FBE, LBE does not monitor using unlicensed frequency triggered by fixed frame period, but monitors using unlicensed frequency triggered by traffic or requirement, fig. 10 is a timing diagram of LBE according to an embodiment of the present invention, and taking fig. 10 as an example, when a device has traffic or requirement triggering to transmit on an unlicensed channel, it must first perform 1010 clear channel assessment or clear channel assessment + extended clear channel assessment, including that the device first evaluates whether the channel is clear by energy detection on the channel (CCA detection), if it is detected that the energy on the channel does not exceed a specified threshold, the device considers that the channel is clear, and the device may directly transmit on the channel; if the detected energy on the channel exceeds a specified threshold, the channel is considered to be occupied by other devices, the device continues to perform Extended clear first arrival detection (ECCA) on the unlicensed channel, if the ECCA detects that the energy on the channel exceeds the specified threshold, the channel is considered to be occupied by other devices, the device does not perform transmission on the channel, otherwise, the channel is considered to be idle, the device can directly perform transmission on the channel, and the duration of transmission on the channel by the device is 1020 channel occupation time. After 1020 the channel occupation time is over, if the device wishes to continue transmitting on the unlicensed channel, the device needs to perform 1030 the extended clear channel assessment on the unlicensed channel again, and if the extended clear channel assessment detects that the channel is idle, the device can continue to occupy the unlicensed channel for transmitting, and the occupation time is "1040 channel occupation time". The time length of the device performing the extended idle channel assessment each time, such as 1010 and 1030, may be the same or different, the time length of the device occupying the channel each time, such as 1020 and 1040, may be the same or different, and the specific time length is calculated by the device according to a correlation formula of the regulation requirement.

With the rapid development of the mobile communication industry, smart terminals appear in a large scale, and the applications of these huge smart terminals are diverse, so that a huge amount of periodic or burst small data volume transmission exists in the future mobile communication process, when the traditional mobile communication technology needs to be extended to an unauthorized frequency to transmit a huge amount of small data of these huge users, the scheduling use method of the unauthorized frequency must be carefully considered to avoid mutual interference between the traditional mobile communication technologies of different operators when the unauthorized frequency is used, and to avoid interference between the traditional mobile communication technologies and wireless communication technologies reused on the unauthorized frequency, and to ensure efficient and fair use of the unauthorized frequency among different technologies, different systems, and different networks.

In view of this, the embodiment of the present invention further provides a method for scheduling and using an unlicensed frequency. First, the present embodiment describes a scheduling and using method of an unlicensed frequency, which is proposed by the present invention, based on three specific method implementation flowcharts. In the implementation flow chart of the three specific methods, the ue establishes an RRC connection with the first base station on a first cell (primary cell, Pcell) controlled by the first base station, and the first base station configures a second cell (secondary cell, Scell) controlled by a second base station for the ue. The first cell uses a first carrier, the first carrier is an authorized frequency, the second cell uses a second carrier, and the second carrier is an unauthorized frequency. The first base station and the second base station may be the same or different.

Fig. 11 is a flowchart of a first method implementation of a method for using unlicensed frequency scheduling according to an embodiment of the present invention, where the method for using unlicensed frequency scheduling includes:

step S1102, a first base station configures UE-specific semi-persistent scheduling opportunities for UE; and the UE receives and stores the semi-static scheduling opportunity configuration sent by the first base station.

The UE-specific semi-persistent scheduling opportunity configured by the first base station for the UE may include a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter, and may further include one or more of a semi-persistent scheduling identifier, a Hybrid Automatic Repeat reQuest (HARQ) process usable by semi-persistent scheduling, an automatically deactivated semi-persistent scheduling opportunity timer or counter, a semi-persistent scheduling opportunity period starting point offset, and the like.

When the first base station and the second base station are different base stations, the first base station and the second base station interactively negotiate the parameters of the semi-static scheduling opportunity and then configure the interactively negotiated semi-static scheduling opportunity configuration for the UE. The first base station and the second base station exchange and negotiate parameters through an interface between the first base station and the second base station.

The UE-specific semi-persistent scheduling opportunity configuration means that the semi-persistent scheduling opportunity configuration is configured to the UE, and the first base station may configure the semi-persistent scheduling opportunity configuration dedicated to each UE for each UE accessing the base station. The first base station transmits semi-static scheduling opportunity configuration to each UE one to one through RRC message.

After configuring the semi-static scheduling opportunity for the UE, the first base station sets the semi-static scheduling opportunity to be in an inactive state, and before the base station activates the semi-static scheduling opportunity configuration, the base station does not schedule the UE on each scheduling opportunity of the configured semi-static scheduling opportunity by using the semi-static scheduling identifier.

In order to ensure Quality of Service (Quality of Service, abbreviated as QoS) of a Service, a semi-persistent scheduling opportunity configuration configured by the first base station for the UE may be configured with a semi-persistent scheduling opportunity period that is less than or equal to a small data traffic burst statistical period. For FBE, since the device cannot compete to the unlicensed frequency in each fixed frame period, in order to guarantee the QoS of the service, the semi-persistent scheduling opportunity period may be configured to be equal to or less than the fixed frame period of the FBE.

Step S1104, the first base station notifies the UE to activate a semi-persistent scheduling opportunity; the UE receives the semi-static scheduling opportunity activation notification sent by the first base station. The activation notification includes downlink assignment information used for downlink transmission or includes uplink grant information used for uplink transmission.

The first base station notifies the UE of activating a semi-persistent scheduling opportunity through an access link between the UE and the first cell, and the activation notification is carried by a Physical Downlink Control Channel (PDCCH for short). The activation notification includes Downlink assignment information (DL assignment) or Uplink grant information (UL grant), and the DL assignment or UL grant includes resource parameters such as allocated Physical Resource Block (PRB) for Downlink/Uplink transmission, modulation coding level, and HARQ process.

When the first base station and the second base station are different base stations, the first base station informs the UE of activating the semi-static scheduling opportunity after the first base station and the second base station carry out interactive negotiation.

Step S1106, the sender detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, and if the channel is idle, the sender directly uses the resource indicated by the downlink assignment/uplink authorization in the activation notification to send data to the receiver at each scheduling opportunity within the next occupied time of the channel; if the channel is busy, data is not transmitted to the receiver at each scheduling opportunity for the next channel occupation time.

A receiver directly receives data on resources indicated by downlink assignment/uplink authorization in an activation notification in each scheduling opportunity within the activation time of the semi-static scheduling opportunity;

or the receiver detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, if the channel is idle, the receiver directly receives data on the resource indicated by the downlink assignment/uplink authorization in the activation notification at each scheduling opportunity within the next channel occupation time, and if the channel is busy, the receiver notifies the sender.

The semi-persistent scheduling opportunity activation time is a time when the base station activates the semi-persistent scheduling opportunity until the semi-persistent scheduling opportunity is deactivated in step S1104. The base station may notify the UE to deactivate the semi-persistent scheduling opportunity through the PDCCH, or, when the semi-persistent scheduling opportunity configuration includes an automatic deactivation semi-persistent scheduling opportunity timer or counter in step S1102, start the timer or counter when the semi-persistent scheduling opportunity is activated, and when the timer is expired or the counter count is ended, consider that the semi-persistent scheduling opportunity is deactivated.

In this step, for downlink transmission, the sender refers to the second base station, and the receiver refers to the user equipment UE; for uplink transmission, the transmitting side refers to the user equipment, and the receiving side refers to the second base station. Specifically, when the receiver determines that the channel is busy, the receiver notifies the sender, and for downlink transmission, the user equipment (receiver) notifies the first base station that the channel is busy through an access link between the user equipment and the first base station, and then the first base station notifies the second base station that the channel is busy (sender). For uplink transmission, the second base station (receiver) first informs the first base station that the channel is busy, and then the first base station informs the user equipment (sender) that the channel is busy through an access link between the first base station and the user equipment. And after receiving the notification that the channel of the receiving party is busy, the transmitting party does not transmit data to the receiving party at each scheduling opportunity within the following channel occupation time.

In this step, the sender/receiver detects the channel state of the unlicensed frequency at the idle channel detection time within the semi-persistent scheduling opportunity activation time, and for the FBE, the sender/receiver detects the channel state of the unlicensed frequency at each idle channel detection time according to the configuration of the FBE within the semi-persistent scheduling opportunity activation time. For LBE, a sender initiates idle channel detection (where idle channel detection may refer to CCA, or CCA + ECCA according to a specific channel state) when there is data to be transmitted in a semi-static scheduling opportunity activation time, and when the detection indicates that a channel is idle, the sender directly sends data to a receiver at each scheduling opportunity in the next channel occupation time by using a resource indicated by downlink assignment/uplink grant in an activation notification, and after the channel occupation time is over, if the sender still has data to transmit, the sender initiates idle channel detection again (here, ECCA detection). It should be noted that, for FBE, FBE related parameters, such as fixed frame period, channel occupation time, idle time, etc., the base station and the UE may determine according to the related regulation requirement and notify each other; similarly, for LBE, calculating relevant parameters of channel occupation time, idle channel evaluation time and extended idle channel evaluation time, and the base station and the UE can determine according to relevant regulation requirements and inform each other.

In the first method implementation flowchart in the embodiment of the present invention, steps S1104 and S1106 may be implemented by another implementation method, including:

for downlink transmission, when a sender (a second base station) has a data transmission requirement on an unauthorized frequency, detecting the channel state of the unauthorized frequency at idle channel detection time, and if the channel is idle, informing a receiver (UE) of activating a semi-static scheduling opportunity, wherein the sender second base station informs the receiver of activating the semi-static scheduling opportunity through the first base station, and the sender (the second base station) directly uses a resource indicated by downlink assignment in the activation notification to transmit data to the receiver at each scheduling opportunity in the next occupied time of the channel. After receiving the activation notification, the receiver directly uses the resources indicated by the downlink assignment in the activation notification to receive data on each scheduling opportunity within the occupied time of the channel; or after receiving the activation notification, if the channel is already judged to be busy through idle channel detection before the activation notification is received, or the channel is judged to be busy through idle channel detection after the activation notification is received, the receiver notifies the sender. And when the channel occupation time is over, the sender and the receiver consider that the semi-static scheduling opportunity is deactivated.

For uplink transmission, when a sender (UE) has a data sending requirement on an unauthorized frequency, detecting the channel state of the unauthorized frequency at idle channel detection time, and if the channel is idle, requesting a receiver (a second base station) to activate a semi-persistent scheduling opportunity, wherein the sender (UE) requests the receiver (the second base station) to activate the semi-persistent scheduling opportunity through a first base station, and the sender (the second base station) informs the receiver (UE) to activate the semi-persistent scheduling opportunity through the first base station; or the second base station detects according to the idle channel before or after receiving the activation request, if the channel is idle, the first base station informs the sender (UE) to activate the semi-static scheduling opportunity, otherwise, the sender (UE) is not informed to activate the semi-static scheduling opportunity. After receiving the activation notification, a sender (UE) directly uses the resource indicated by the uplink authorization in the activation notification to send data on each scheduling opportunity in the next channel occupation time. And the receiving party (the second base station) directly receives data on each scheduling opportunity by using the resource indicated by the uplink authorization in the activation notification. And when the channel occupation time is over, the sender and the receiver consider that the semi-static scheduling opportunity is deactivated.

By adopting the first method to implement the unlicensed frequency scheduling use method of the flowchart, interference-free, efficient and fair transmission of huge small data on the unlicensed frequency can be realized, and the overhead of PDCCH scheduling on the licensed frequency caused by transmission of the huge small data can be effectively reduced.

Fig. 12 is a flowchart of a second method implementation of a method for using unlicensed frequency scheduling according to an embodiment of the present invention, where the method for using unlicensed frequency scheduling includes:

step S1202, a first base station configures a semi-persistent scheduling opportunity common to cells for all UE residing in a first cell; the UE residing in the first cell receives and saves the semi-static scheduling opportunity transmitted by the first base station.

The semi-persistent scheduling opportunity configured by the first base station for all UEs residing in the first cell and shared by the cells may include a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter, may further include a HARQ process usable by semi-persistent scheduling, and one or all of parameters such as a semi-persistent scheduling opportunity timer or a counter are automatically deactivated, and may further include a scheduling identifier used for the UE to monitor a semi-persistent scheduling notification common to activated cells, that is, an activated scheduling identifier.

When the first base station and the second base station are different base stations, the first base station and the second base station interactively negotiate the parameters of the semi-static scheduling opportunity and then configure the interactively negotiated semi-static scheduling opportunity configuration by the first base station. The first base station and the second base station exchange and negotiate parameters through an interface between the first base station and the second base station.

The semi-persistent scheduling opportunity common to the cell means that the semi-persistent scheduling opportunity configuration is usable by all UEs camping on the cell. The first base station may broadcast the semi-persistent scheduling opportunity common to the cells via an RRC message, such as a broadcast message; or the first base station may inform the UEs of the semi-persistent scheduling opportunity common to the cells through a one-to-one RRC dedicated message sent to the UEs.

After each UE accesses the first base station, the first base station configures semi-static scheduling identifiers for each UE, and the semi-static scheduling identifiers of each UE are different from each other.

In order to ensure the QoS of the service, when the first base station configures a semi-persistent scheduling opportunity common to the cells, a semi-persistent scheduling opportunity period may be configured to be less than or equal to a burst statistical period of various small data services. For FBE, since the device cannot compete to the unlicensed frequency in each fixed frame period, in order to guarantee the QoS of the service, the semi-persistent scheduling opportunity period may be configured to be equal to or less than the fixed frame period of the FBE.

Step S1204, the first base station notifies one or more UEs to activate a semi-persistent scheduling opportunity; the one or more UEs receive a semi-persistent scheduling opportunity activation notification transmitted by the first base station. The activation notification includes semi-static scheduling identifiers of one or more UEs, and the activation notification may further include downlink assignment information respectively allocated to one UE or each UE of the multiple UEs for downlink transmission, or include uplink grant information respectively allocated to one UE or each UE of the multiple UEs for uplink transmission.

And the first base station informs one or more UE to activate the semi-static scheduling opportunity through an access link between the UE and the first cell when judging that one or more UEs need to use the semi-static scheduling opportunity to transmit data according to the service condition of each UE. The activation notification is carried by the PDCCH, and when one UE is activated, the activation notification includes the semi-persistent scheduling identifier of the one UE and the DL assignment or UL grant allocated to the semi-persistent scheduling opportunity of the one UE. When a plurality of UEs are activated, the activation notification includes semi-persistent scheduling identities of the plurality of UEs and DL assignment or UL grant respectively allocated to the semi-persistent scheduling opportunities of the plurality of UEs.

Each UE accessing the first base station can monitor the activation notification sent by the first base station by using the PDCCH common search space of the activation scheduling identification of the first base station. And after receiving the activation notification, one or more UEs indicated by the semi-persistent scheduling identifier of the UE in the activation notification activate the semi-persistent scheduling configuration.

Step S1206, the sender detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, and if the channel is idle, the sender directly uses the resource indicated by the downlink assignment/uplink authorization in the activation notification to send data to the receiver at each scheduling opportunity within the next channel occupation time; if the channel is busy, data is not transmitted to the receiver at each scheduling opportunity for the next channel occupation time.

In this step, for downlink transmission, the sender refers to the second base station, and the receiver refers to one or more UEs in step S1204. The second base station detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, and directly uses the resources of the downlink assignment indication allocated to one or more UEs in the activation notice to send data to one or more UEs at each scheduling opportunity within the next channel occupation time if the channel is idle; if the channel is busy, data is not transmitted to one or more UEs at each scheduling opportunity for the next channel occupancy time. One or more UEs receive data in the semi-static scheduling opportunity activation time and in each scheduling opportunity directly on the resources indicated by the downlink assignment allocated to the UE or the UEs in the activation notification; or one or more UEs detect the channel state of the unauthorized frequency at the idle channel detection time in the activation time of the semi-static scheduling opportunity, if the channel is idle, at each scheduling opportunity in the next channel occupation time, directly distribute the resource indicated by the downlink assignment of one or more UEs in the activation notification to receive data at each scheduling opportunity, if the channel is busy, one or more UEs (receivers) notify the first base station that the channel is busy through the access link between the one or more UEs and the first base station, and then the first base station notifies the second base station that the channel is busy (transmitters). And after receiving the notification that the channel of the receiving party is busy, the second base station does not send data to the receiving party at each scheduling opportunity within the following channel occupation time.

In this step, for uplink transmission, the sender refers to one or more UEs in step S1204, and the receiver refers to a second base station. One or more UE detects the channel state of the non-authorized frequency in the idle channel detection time in the activation time of the semi-static scheduling opportunity, and if the channel is idle, the resource of the uplink authorization indication allocated to one or more UE in the activation notice is directly used for sending data to the second base station in each scheduling opportunity in the next occupied time of the channel; if the channel is busy, no data is transmitted to the second base station at each scheduling opportunity for the next channel occupancy time. The second base station receives data in the activation time of the semi-static scheduling opportunity and in each scheduling opportunity directly on the resource of the uplink authorization indication allocated to one or more UEs in the activation notification; or, the second base station detects the channel state of the unlicensed frequency at the idle channel detection time during the semi-static scheduling opportunity activation time, and if the channel is idle, the resource of the uplink grant indication directly allocated to one or more UEs in the activation notification receives data at each scheduling opportunity within the next channel occupation time, and if the channel is busy, the second base station (receiver) first notifies the first base station that the channel is busy, and then the first base station notifies the one or more UEs that the channel is busy through the access link between the first base station and the one or more UEs (sender). And after receiving the notification that the channel of the receiving party is busy, one or more UEs do not send data to the receiving party at each scheduling opportunity within the following channel occupation time.

In this step, the semi-persistent scheduling opportunity activation time is defined, and the sender/receiver detects the description of the channel state of the unlicensed frequency at the idle channel detection time within the semi-persistent scheduling opportunity activation time, and synchronizes step S1106. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

In the second method implementation flowchart of the embodiment of the present invention, steps S1204 and S1206 may be implemented by another implementation method described in the first method implementation flowchart, in addition to the above implementation method, for the uplink transmission, as described in the technical features of the alternative steps S1104 and S1106, for downlink transmission, when the sender (second base station) needs to send data to one or more UEs on an unlicensed frequency, detecting a channel status of the unlicensed frequency at a free channel detection time, notifying a receiving side(s) to activate a semi-persistent scheduling opportunity if the channel is free, here, the second base station of the sending party notifies the receiving party of activating the semi-persistent scheduling opportunity through the first base station, and the activation notification includes downlink assignment information for downlink transmission of each UE allocated to one UE or multiple UEs, and semi-persistent scheduling identifiers of the one or multiple UEs. And the transmitting side (second base station) directly transmits data to the receiving side at each scheduling opportunity in the following channel occupation time by using the resources indicated by the downlink assignment distributed to one or more UEs in the activation notification.

Each UE accessing the first base station can monitor the activation notification sent by the first base station by using the PDCCH common search space of the activation scheduling identification of the first base station. And after receiving the activation notification, one or more UEs indicated by the semi-persistent scheduling identifier of the UE in the activation notification activate the semi-persistent scheduling configuration. After receiving the activation notification, a receiver (one or more UE) directly uses the resources indicated by the downlink assignment allocated to the one or more UE in the activation notification to receive data on each scheduling opportunity in each scheduling opportunity within the channel occupation time; or after the receiving side (one or more UE) receives the activation notification, if the channel is already determined to be busy through idle channel detection before the activation notification is received, or the channel is determined to be busy through idle channel detection after the activation notification is received, the transmitting side is notified. And when the channel occupation time is over, the sender and the receiver consider that the semi-static scheduling opportunity is deactivated.

By adopting the method for using the unauthorized frequency scheduling implemented by the second method in the embodiment of the invention, the interference-free, efficient and fair transmission of huge amount of small data on the unauthorized frequency can be realized, and one or more UE (user equipment) with data transmission requirements can be activated at one time through the activation notification of the PDCCH (physical downlink control channel) bearer, so that the PDCCH scheduling overhead on the authorized frequency caused by the transmission of the huge amount of small data can be further effectively reduced on the basis of the technology of implementing the flow by the first method.

Fig. 13 is a flowchart of a third method for scheduling and using unlicensed frequencies according to an embodiment of the present invention, where the flowchart of the third method is suitable for downlink data transmission in which a base station transmits data to a UE. According to a third method, the flow chart is implemented, and the method for using the unauthorized frequency scheduling comprises the following steps:

step S1302, a first base station configures a semi-persistent scheduling opportunity common to cells for all UEs residing in a first cell; the UE residing in the first cell receives and saves the semi-static scheduling opportunity transmitted by the first base station.

This step specifically explains the synchronization step S1202.

Step S1304, when the second base station needs to send data transmission to one or more UEs, the first base station notifies the one or more UEs to activate a semi-persistent scheduling opportunity; one or more UEs receive a semi-persistent scheduling opportunity activation notification transmitted by a first base station. The activation notification includes one or more downlink assignment information used for downlink transmission.

And the first base station informs one or more UE to activate the semi-static scheduling opportunity through an access link between the UE and the first cell when judging that the semi-static scheduling opportunity is needed to be used for transmitting data to one or more UE according to the service condition of each UE. The activation notification is carried by the PDCCH, and the activation notification includes the semi-static scheduling identifier of the one or more UEs and the one or more downlink assignment information.

Step S1306, the sender (second base station) detects a channel state of the unlicensed frequency at idle channel detection time during semi-persistent scheduling opportunity activation time, and if the channel is idle, directly sends data to one or more UEs at each scheduling opportunity by using resources indicated by one or more downlink assignments in the activation notification at each scheduling opportunity in the next channel occupation time; if the channel is busy, data is not transmitted to one or more UEs at each scheduling opportunity for the next channel occupancy time.

The receiver (one or more UEs) receives data on each scheduling opportunity directly on each downlink assigned resource in the activation notification during the semi-static scheduling opportunity activation time; or the receiving side detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, if the channel is idle, the receiving side directly receives data on the resources indicated by each downlink assignment in the activation notification in each scheduling opportunity within the next channel occupation time, and if the channel is busy, the receiving side notifies the sending side (first notifies the first base station, and then notifies the second base station by the first base station).

Here, if the second base station needs to transmit data to the plurality of UEs at one scheduling opportunity, the second base station transmits data to the plurality of UEs using resources indicated by different downlink assignments among the plurality of downlink assignments, respectively. Here, on different scheduling opportunities, data may be transmitted to the same UE using resources indicated in different downlink assignments.

Here, one or more UEs receive data on each scheduling opportunity directly on each downlink assigned resource in the activation notification during the semi-static scheduling opportunity activation time, process the received data if it is data sent to the UE, and discard the received data otherwise. Specifically, the UE may determine whether the data is sent to the UE by using a scrambling method of the data.

Or,

a sender (a second base station) detects the channel state of the unauthorized frequency in the idle channel detection time within the activation time of the semi-static scheduling opportunity, if the channel is idle, the corresponding use relationship between one or more downlink assignments in the activation notification and one or more UE (user equipment) is indicated by scheduling control information carried by a PDCCH (physical downlink control channel) of the first base station in each scheduling opportunity within the next channel occupation time, and the data is directly sent to the corresponding UE on the resources indicated by the downlink assignments according to the corresponding use relationship; if the channel is busy, data is not transmitted to one or more UEs at each scheduling opportunity for the next channel occupancy time.

The receiving side (one or more UEs) receives PDCCH scheduling control information, and if the PDCCH control information indicates that the UE receiving the information uses one of the downlink assignments, the UE receives data directly on the resource indicated by the one downlink assignment. Or, the receiving side (one or more UEs) detects the channel state of the unlicensed frequency at the idle channel detection time within the semi-persistent scheduling opportunity activation time, and if the channel is idle, the one or more UEs receive PDCCH scheduling control information, and if the PDCCH scheduling control information indicates that the UE receiving the information uses one of the downlink assignments, the UE directly receives data on the resource indicated by the one downlink assignment. If the channel is busy, one or more UEs notify the sender (first notify the first base station, then notify the second base station by the first base station).

Here, if the second base station needs to transmit data to a plurality of UEs at one scheduling opportunity, the second base station instructs the plurality of UEs, respectively, which downlink assignment in the activation notification is used, with PDCCH scheduling control information. Here, PDCCH scheduling control information may be used to indicate different downlink assignments for transmitting data to the same UE on different scheduling opportunities.

In the third method implementation flowchart of the present invention, steps S1304 and S1306 may be replaced by another implementation method similar to that described in the second method implementation flowchart, in addition to the above implementation methods. When a specific second base station needs to send data to one or more UEs on an unlicensed frequency, detecting a channel state of the unlicensed frequency at idle channel detection time, and if the channel is idle, notifying one or more UEs to activate a semi-persistent scheduling opportunity, where the second base station notifies one or more UEs to activate the semi-persistent scheduling opportunity through the first base station, and the activation notification includes one or more pieces of downlink assignment information and a semi-persistent scheduling identifier of one or more UEs. And the second base station directly uses the resources indicated by the one or more downlink assignments in the activation notification to send data to one or more UEs at each scheduling opportunity in the following channel occupation time.

Each UE accessing the first base station can monitor the activation notification sent by the first base station by using the PDCCH common search space of the activation scheduling identification of the first base station. And after receiving the activation notification, one or more UEs indicated by the semi-persistent scheduling identifier of the UE in the activation notification activate the semi-persistent scheduling configuration. After receiving the activation notification, one or more UEs directly receive data on one or more resources indicated by downlink assignment in the activation notification at each scheduling opportunity within the channel occupation time; or after one or more UEs receive the activation notification, if the channel is busy through idle channel detection judgment before the activation notification is received, or the channel is busy through idle channel detection judgment after the activation notification is received, the sender is notified. And when the channel occupation time is over, the sender and the receiver consider that the semi-static scheduling opportunity is deactivated.

Or, the replacing step may be that, when the second base station needs to send data to one or more UEs on the unlicensed frequency, the second base station detects a channel state of the unlicensed frequency at idle channel detection time, and if the channel is idle, notifies the one or more UEs to activate the semi-persistent scheduling opportunity, where the second base station notifies the one or more UEs to activate the semi-persistent scheduling opportunity through the first base station, and the activation notification includes one or more pieces of downlink assignment information and a semi-persistent scheduling identifier of the one or more UEs. And the second base station indicates the corresponding use relationship between one or more downlink assignments in the activation notification and one or more UEs by using the scheduling control information carried by the PDCCH of the first base station in each scheduling opportunity in the following channel occupation time, and directly sends data to the corresponding UEs on the resources indicated by the downlink assignments according to the corresponding use relationship.

Each UE accessing the first base station can monitor the activation notification sent by the first base station by using the PDCCH common search space of the activation scheduling identification of the first base station. And after receiving the activation notification, one or more UEs indicated by the semi-persistent scheduling identifier of the UE in the activation notification activate the semi-persistent scheduling configuration. After one or more UEs receive the activation notification, at each scheduling opportunity within the channel occupation time, if PDCCH control information is received and the control information indicates that the UE receiving the information uses one of the downlink assignments, the UE directly receives data on a resource indicated by the one downlink assignment. Or after one or more UEs receive the activation notification, if the channel is busy through idle channel detection judgment before the activation notification is received, or the channel is busy through idle channel detection judgment after the activation notification is received, the sender is notified. And when the channel occupation time is over, the sender and the receiver consider that the semi-static scheduling opportunity is deactivated.

The third method of the invention is adopted to implement the method for using the unauthorized frequency scheduling of the flow chart, which can realize the interference-free, high-efficiency and fair transmission of huge amount of small data on the unauthorized frequency, and can further effectively reduce the expenditure of PDCCH scheduling on the authorized frequency caused by the transmission of the huge amount of small data on the technology of the first method implementing the flow by activating and informing one or more UE (user equipment) with data transmission requirements through the activation of PDCCH (physical downlink control channel) bearing. Meanwhile, in the third implementation method, one downlink assigned resource may be shared and used by different UEs on different scheduling opportunities, and the resource utilization efficiency may be further improved.

According to the above implementation method, the following describes the unlicensed frequency scheduling using method of the present invention with reference to the accompanying drawings and embodiments.

Example one

Fig. 14 is a flowchart of a method for scheduling and using an unlicensed carrier according to a first embodiment of the present invention, where the first embodiment takes the L-eNB1 in fig. 7 to transmit downlink data to the UE1 and the UE2 under the coverage of the L-eNB2, and illustrates an example of a first embodiment of the present invention. In this embodiment, all UEs have multi-carrier capability, which includes the following implementation processes:

step S1402, UE1, UE2 establishes RRC connection with M-eNB on cell1 controlled by M-eNB.

After the UE1 and the UE2 establish an RRC connection with the M-eNB to access the M-eNB, the M-eNB configures a cell2 for the UE1 and the UE2 according to one or more of the service requirements, the load condition of the cell1, the operator policy and other factors, for example, the service transmission requirements of the UE1 and the UE2 are increased, at this time, the cell1 is a primary cell of the UE1 and the UE2, the cell2 is a secondary cell of the UE1 and the UE2, and the cell2 uses an unlicensed frequency F2.

In step S1404, the M-eNB transmits to the UE1 and the UE2 the downlink semi-persistent scheduling opportunity configurations configured for the UE1 and the UE2, respectively.

The M-eNB sends the configuration to the UE1 and the UE2 through an RRC dedicated message, such as an RRC reconfiguration message (RRCConnectionReconfiguration), over an access link with the UE1 and the UE2, respectively.

FIG. 15 is a diagram illustrating a semi-static scheduling opportunity configuration configured by an M-eNB for a UE1 and a UE2 according to an embodiment of the present invention. In this embodiment, the cell2, the UE1, and the UE2 perform LBT based on FBE when using the unlicensed frequency F2, and the frame timing of FBE is as shown in fig. 15. In this embodiment, the semi-persistent scheduling opportunity configuration configured by the M-eNB for the UE1/UE2 is configured in a periodic manner, and the configuration includes a semi-persistent scheduling opportunity period, a semi-persistent scheduling opportunity period starting point offset, and a semi-persistent scheduling identifier of the UE1/UE 2. The M-eNB sends the above configuration to UE1/UE2 at time T1 in FIG. 15. In this embodiment, the M-eNB is UE1, UE2 configures semi-persistent scheduling opportunity periods with the same point length, and configures different starting point offsets of the semi-persistent scheduling opportunity periods. In this embodiment, the configured semi-persistent scheduling opportunity period is equal to the FBE frame period, and in practical applications, the semi-persistent scheduling opportunity period may be configured completely without being equal to the FBE frame period, for example, the configured semi-persistent scheduling opportunity period is smaller than the FBE frame period.

It should be noted that before the M-eNB sends the semi-persistent scheduling configuration to the UE, if the L-eNB1 has a radio resource control unit independent of the M-eNB, the M-eNB needs to negotiate with the L-eNB1 through the connection Line1 between the M-eNB and the L-eNB1 to configure the semi-persistent scheduling configuration parameters for the UE, which is 1404-1 in fig. 14.

In this step, after receiving the configuration, the UE1 and the UE2 may calculate the time of all the semi-persistent scheduling opportunities according to a semi-persistent scheduling opportunity CYCLE (denoted as CYCLE) and a semi-persistent scheduling opportunity CYCLE start point OFFSET (denoted as CYCLE-OFFSET), as shown by black dots in the figure, and the specific calculation method may be [ SFN x 10+ SUBFRAME ]% CYCLE ═ CYCLE-OFFSET% CYCLE, where SFN is a system frame number, SUBFRAM is a SUBFRAME number, and% denotes modulo operation, and the calculated SFN and SUBFRAME are the time of the semi-persistent scheduling opportunities. In this step, if the semi-persistent scheduling opportunity configuration is not configured with the semi-persistent scheduling opportunity period starting point offset, the UE1 and the UE2 receive and store the semi-persistent scheduling configuration, and after a command for activating the semi-persistent scheduling opportunity configuration is subsequently received, calculate the time of each semi-persistent scheduling opportunity.

At step S1406, the M-eNB informs the UE1 that the UE2 activates semi-static scheduling opportunity configuration.

When the M-eNB needs to transmit data to the UE1 and UE2 through the L-eNB1, the M-eNB uses an access link between the M-eNB and the UE1 and UE2 to inform the UE1 of the activation notification carried by the PDCCH, and the UE2 activates semi-static scheduling opportunity configuration (time T2 in FIG. 15). The activation notification may be a signaling sent on a PDCCH indicating activation of semi-persistent scheduling opportunity configuration scrambled by Cell Radio network temporary identities (C-RNTIs) respectively allocated by the UE1 and the UE2 on the Cell1, or a signaling sent on a PDCCH indicating activation of semi-persistent scheduling opportunity configuration scrambled by the semi-persistent scheduling identities of the UE1 and the UE2 allocated in step S1404.

The activation notification includes information allocated by the M-eNB for the L-eNB1 to send downlink data DL assignment to the UE1, UE 2.

If step S1404, the semi-persistent scheduling opportunity configuration is not configured with a semi-persistent scheduling opportunity period starting point offset, then in this step, UE1, UE2 calculates, after receiving the activation notification, a time of each semi-persistent scheduling opportunity according to the semi-persistent scheduling opportunity period (denoted as CYCLE) and a frame number (denoted as SFN-a) and a SUBFRAME number (denoted as SUBFRAME-a) when receiving the activation notification, where SFN 10+ SUBFRAME ═ 10 [ (10 + SFN-a + SUBFRAME-a) + N + CYCLE ]% 10240, where SFN is a system frame number, SUBFRAM is a SUBFRAME number,% denotes a modulo operation, N is an integer greater than 0, and the calculated SFN and the calculated SUBFRAME are times of the semi-persistent scheduling opportunity, as shown by the shaded dots in fig. 15.

It should be noted that, here, only another method for calculating the semi-persistent scheduling opportunity is described, and in the subsequent steps of this embodiment, the semi-persistent scheduling opportunity calculated in step S1404 is taken as an example for description.

Before the M-eNB sends the activation notification to the UE, if the L-eNB1 has a radio resource control element independent of M-eN, the M-eNB needs to negotiate the timing of sending the activation notification with the L-eNB1 through the connection Line1 between the M-eNB and the L-eNB1, as shown in step S1406-1 in fig. 14.

Step S1408, CCA detection;

the L-eNB1 performs CCA detection on F2 at a CCA detection time (fig. 15CCA1) of the first idle time after the M-eNB transmits the activation notification, detecting that the F2 channel is idle.

Optionally, the UE1 and the UE2 perform CCA detection on the F2 at a CCA detection time (fig. 15CCA1) of the first idle time after receiving the activation notification. In this embodiment, it is assumed that the AP1 near the UE1 is occupying F2 at this time, so the UE1 detects that the channel is busy, and the UE2 detects that the channel is idle because it is far away from the AP 1.

In step S1410, the UE1 notifies the M-eNB that the channel is busy.

The UE1 informs the M-eNB that the channel is busy through its access link with the M-eNB 1. After the M-eNB receives the notification that the channel is busy, if the L-eNB1 has a radio resource control unit independent of the M-eN, the M-eNB needs to notify the L-eNB1 that the channel is busy through a connection Line1 between the M-eNB and the L-eNB 1.

Step S1412, the L-eNB1 transmits data to the UE2 at time T3;

the L-eNB1 transmits data to UE2 directly using the resources indicated by the downlink assignment assigned to UE2 in the activation notification, the data being scrambled with the semi-static scheduling identity of UE 2. In the configuration of this embodiment, the semi-persistent scheduling opportunity period is equal to the FBE frame period, so there is only one semi-persistent scheduling opportunity in one channel occupation time, and if there are multiple semi-persistent scheduling opportunities in one channel occupation time configured in practical application, the L-eNB1 directly transmits data to the UE2 using the resource indicated by the downlink assignment allocated to the UE2 in the activation notification in all of the multiple semi-persistent scheduling opportunities.

Step S1414, CCA detection;

the L-eNB1 performs CCA detection at a CCA detection time F2 (fig. 15CCA2) of the second idle time after the M-eNB transmits the activation notification, and detects that the F2 channel is idle.

Optionally, both the UE1 and the UE2 perform CCA detection at the CCA detection time F2 (fig. 15CCA2) of the first idle time after receiving the activation notification, and detect that the channel is idle.

Step S1416, the L-eNB1 transmits data to the UE1/UE2 at time T4/T5;

the L-eNB1 transmits data to UE1/UE2 directly using the resources indicated by the downlink assignment assigned to UE1/UE2 in the activation notification, the data being scrambled with the semi-static scheduling identity of UE1/UE 2.

In step S1418, the M-eNB informs the UE1 that the UE2 deactivates the semi-persistent scheduling opportunity configuration.

When the M-eNB judges that the data does not need to be sent to the UE1 through the L-eNB1 any more, when the UE2 sends the data, the M-eNB uses an access link between the M-eNB and the UE1 and the UE2 to inform the UE1 of deactivation notification carried by a PDCCH, and the UE2 deactivates semi-static scheduling opportunity configuration (time T6 in FIG. 15). The deactivation notification may be a signaling sent on a PDCCH indicating deactivation of semi-persistent scheduling opportunity configuration, scrambled by a Cell radio network Temporary Identifier (C-RNTI) respectively allocated by the UE1 and the UE2 on the Cell1, or a signaling sent on a PDCCH indicating deactivation of semi-persistent scheduling opportunity configuration, scrambled by a semi-persistent scheduling Identifier of the UE1 and the UE2 allocated in step S1404.

It should be noted that before the M-eNB sends the deactivation notification to the UE, if the L-eNB1 has a radio resource control element independent of the M-eN, the M-eNB needs to notify the L-eNB1 that the semi-persistent scheduling opportunity configuration is deactivated through the connection Line1 between the M-eNB and the L-eNB1, as shown in step S1418-1 in fig. 14.

Example two

Fig. 16 is a flowchart of a method for scheduling and using an unlicensed carrier according to a second embodiment of the present invention, where the second embodiment takes UE1 and UE2 in fig. 8 as an example of transmitting uplink data to L-eNB1 by using unlicensed frequency F2, and illustrates an example of a specific implementation of the second method of the present invention. In this embodiment, all UEs have multi-carrier capability, and UE1 and UE2 already reside in a cell3 controlled by L-eNB1, including the following implementation procedures:

step S1602, UE1, UE2 receive the broadcast of cell3, and obtain the semi-persistent scheduling opportunity configuration (uplink) shared by the cells, at time T1 in fig. 17, fig. 17 is a diagram of the semi-persistent scheduling opportunity configuration shared by the cells configured by the L-eNB in the second embodiment of the present invention;

the semi-static scheduling opportunity configuration common to the cells comprises a semi-static scheduling subframe bitmap and can also comprise an activation scheduling identifier. The semi-persistent scheduling subframe bitmap is a timing chart which periodically appears and is used for indicating whether each subframe in a period is a semi-persistent scheduling opportunity, for example, if the period of the semi-persistent scheduling subframe bitmap is 10ms, the bitmap is as follows: 1000100100, where the first bit corresponds to the first subframe in a 10ms frame, the second bit corresponds to the second subframe, and so on, "1" indicates a semi-persistent scheduling opportunity, and "0" indicates a non-semi-persistent scheduling opportunity. The semi-static scheduling SUBFRAME bitmap may further include a starting point OFFSET (denoted as CYCLE-OFFSET) of the semi-static scheduling SUBFRAME bitmap, the starting time of the semi-static scheduling SUBFRAME bitmap in the system may be calculated according to a period (i.e., a bitmap length, denoted as CYCLE) of the semi-static scheduling SUBFRAME bitmap and the starting point OFFSET, the specific calculation method may be [ SFN 10+ SUBFRAME ]% CYCLE ═ CYCLE-OFFSET% CYCLE, and the calculated SFN and SUBFRAME are the starting time of the semi-static scheduling SUBFRAME bitmap. As shown in fig. 17, in this embodiment, the semi-persistent scheduling subframe bitmap period (i.e., length) is set to be equal to the length of the FBE frame period, and there are 4 semi-persistent scheduling occasions in one semi-persistent scheduling subframe bitmap period. In practical application, the semi-static scheduling subframe bitmap period may be set not to be equal to the FBE frame period.

At step S1604, the L-eNB1 activates UE1, a semi-persistent scheduling opportunity configuration common to the cells of UE 2.

It should be noted that, before this step, the UE1 and the UE2 have already established an RRC connection with the L-eNB1 on the cell3, and on this basis, the L-eNB1 configures the cell4 for the UE1/UE2, where the configuration includes the semi-static scheduling opportunity identifier of the UE1/UE 2.

The L-eNB1 judges that data needs to be sent to the UE1 through an unlicensed frequency according to service needs, when the UE2 sends data, the L-eNB1 informs the UE1 of an activation notification of a PDCCH bearer of the cell3 licensed frequency F1, and the UE2 activates semi-persistent scheduling opportunity configuration common to cells (T2 in FIG. 17).

The activation notification may be signaling sent on PDCCH of cell3 indicating activation of semi-persistent scheduling opportunity configuration, scrambled by C-RNTI respectively allocated by UE2 on cell3 using UE 1. The activation notification includes UL grant information allocated to UE1 and UE2, respectively.

The activation notification may also be signaling sent on the PDCCH of cell3 scrambled with an activation schedule identifier obtained from the cell3 broadcast in step S1602 or specified according to protocol standardization. The activation notification includes UL grant information respectively allocated to UE1 and UE2, and semi-persistent scheduling identities of UE1 and UE 2.

Step S1606, CCA detection;

the UE1, UE2 performs CCA detection on F2 at the CCA detection time (CCA 1 in fig. 17) of the first idle time after receiving the activation notification (T2 in fig. 17), and detects that the F2 channel is idle.

Optionally, the L-eNB1 performs CCA detection on the F2 at a CCA detection time (CCA 1 in fig. 17) of the first idle time after the activation notification is sent, and detects that the F2 channel is idle.

In step S1608, the UE1 and the UE2 transmit data to the L-eNB1 using the resources indicated by the UL grant allocated to each of the UEs in the activation notification directly for 4 semi-persistent scheduling opportunities (T3 to T6) in the channel occupation time after the CCA1 shown in fig. 17, and the data are scrambled by the semi-persistent scheduling identities of the UEs 1 and 2, respectively.

Step S1610, CCA detection;

UE1, UE2 CCA detects F2 at the CCA detection time of the second idle time (CCA 2 in fig. 17) after the end of the channel occupancy after CCA 1. In this embodiment, it is assumed that the AP1 near the UE1 is occupying F2 at this time, so the UE1 detects that the channel is busy, and the UE2 detects that the channel is idle because it is far away from the AP 1.

Optionally, after the channel occupation after the CCA1 is finished, the L-eNB1 performs CCA detection on the F2 at a CCA detection time (CCA 2 in fig. 17) of the second idle time, and at this time, since the AP1 is occupying the F2, the AP1 and the L-eNB1 may listen to each other, the L-eNB1 detects that the channel is busy.

At step S1612, the L-eNB1 informs the UE1 using signaling carried by the PDCCH of the cell3 licensed frequency F1 that the UE2 channel is busy.

Upon receiving the notification that the L-eNB1 channel is busy, the UE2 does not transmit data to the L-eNB1 on each semi-static scheduling opportunity for the channel occupancy time after the CCA 2.

At step S1614, the L-eNB1 informs the UE1 that the UE2 deactivates the semi-persistent scheduling opportunity configuration common to the cells.

The L-eNB1 judges that the unlicensed frequency F2 is no longer needed to be used for the UE1, when the UE2 transmits data, or when the L-eNB1 does not receive data on the resources indicated by the UL grant allocated to the UE1 and the UE2 for a long time, the L-eNB1 informs the UE1 of the deactivation notification of the PDCCH bearer of the licensed frequency F1 of the cell3, and the UE2 deactivates the semi-persistent scheduling opportunity configuration common to the cells (time T7 in FIG. 17).

The deactivation notification may be signaling sent on PDCCH of cell3, which is scrambled by C-RNTI respectively allocated by UE1 by UE2 on cell3 and indicates deactivation of semi-persistent scheduling opportunity configuration, or signaling sent on PDCCH of cell3, which is scrambled by activation scheduling identifier acquired from cell3 broadcast in step 1001 or defined according to protocol standardization. The deactivation notification includes semi-static scheduling identities of the UE1 and the UE 2.

EXAMPLE III

Fig. 18 is a flowchart of a method for scheduling and using an unlicensed carrier according to a third embodiment of the present invention, where the third embodiment takes the L-eNB1 in fig. 8 to transmit downlink data to the UE1 and the UE2 using the unlicensed frequency F2 as an example, and illustrates a specific implementation example of the third method of the present invention. In this embodiment, the semi-persistent scheduling opportunity common to the cells is configured as in the second embodiment (as shown in fig. 17). The third embodiment specifically comprises the following implementation processes:

step S1802, UE1, UE2 receive the broadcast of cell3, and obtain the semi-persistent scheduling opportunity configuration (uplink) common to the cells, at time T1 in fig. 17;

the implementation manner of this step is the same as the step S1602 in the example.

At step S1804, the L-eNB1 activates UE1, a semi-persistent scheduling opportunity configuration common to the cells of UE 2.

The L-eNB1 judges that data needs to be sent to the UE1 through an unlicensed frequency according to service needs, when the UE2 sends data, the L-eNB1 informs the UE1 of activation of a PDCCH bearer of the cell3 licensed frequency F1, and the UE2 activates semi-persistent scheduling opportunity configuration common to cells (T2 in FIG. 17).

The activation notification may be signaling sent on PDCCH of cell3 indicating activation of semi-persistent scheduling opportunity configuration, scrambled by C-RNTI respectively allocated by UE2 on cell3 using UE 1. The activation notification includes DL assignment information assigned to the UE1, and the UE2 shares the use.

The activation notification may also be signaling sent on the PDCCH of cell3 scrambled with an activation schedule identifier obtained from the cell3 broadcast in step S1802 or specified according to protocol standardization. The activation notification includes one DL assignment information allocated to the UE1, UE2 sharing the usage, and semi-static scheduling identities of the UE1, UE 2.

Step S1806, CCA detection;

the L-eNB1 performs CCA detection for F2 at the CCA detection time (CCA 1 in fig. 17) of the first idle time after transmitting the activation notification (T2 in fig. 17), detecting that the F2 channel is idle.

Optionally, the UE1 and the UE2 perform CCA detection on the F2 at a CCA detection time (CCA 1 in fig. 17) of the first idle time after receiving the activation notification, and detect that the F2 channel is idle.

In step S1808, the L-eNB1 transmits data to the UE1 at time T4, T6 and to the UE2 at time T3, T5.

The L-eNB1 transmits data to the UE1 at times T4, T6, directly using the resource allocated to the UE1 in the activation notification, the UE2 sharing the resource indicated by the used dl assignment, the data being scrambled with the semi-persistent scheduling identity of the UE 1; at time T3, data is transmitted to UE2 at time T5, the data being scrambled with the semi-static scheduling identity of UE 2.

The UE1 and the UE2 use the semi-static scheduling identifier of the UE at the time of T3 to T6 to detect whether data sent to the UE exist or not, the UE1 receives the data sent to the UE at the time of T4 and T6, and the UE2 receives the data sent to the UE at the time of T3 and T5.

In this embodiment, the UE1 is not described again, the processing of the UE2 when detecting that the channel is busy is also not described again, and the process of deactivating the semi-persistent scheduling opportunity configuration by the L-eNB1 is also described again, which are the same as the processing in the second embodiment.

Example four

Fig. 19 is a flowchart of a method for scheduling and using an unlicensed carrier according to a fourth embodiment of the present invention, where the fourth embodiment takes the L-eNB1 in fig. 8 to transmit downlink data to the UE1, the UE2, and the UE3 using the unlicensed frequency F2, and illustrates another specific implementation example of the third method according to the present invention. The method specifically comprises the following implementation processes:

step S1902, UE1, UE2, and UE3 receive the broadcast of cell3, and obtain the semi-persistent scheduling opportunity configuration (uplink) common to the cells, at time T1 in fig. 17;

this step is performed in the same manner as in example step 1802.

At step S1904, the L-eNB1 activates semi-persistent scheduling opportunity configurations common to the cells of UE1, UE2, and UE 3.

It should be noted that, before this step, the UE1, UE2, and UE3 have already established an RRC connection with the L-eNB1 on the cell3, and on this basis, the L-eNB1 configures a cell4 for the UE1/UE2/UE3, where the configuration includes the semi-static scheduling opportunity identifier of the UE1/UE2/UE 3.

When the L-eNB1 determines that data needs to be sent to the UE1, UE2, and UE3 through the unlicensed frequency according to the service requirement, the L-eNB1 notifies the UE1, UE2, and UE3 of activating the semi-persistent scheduling opportunity configuration common to the cells by using the activation notification of the PDCCH bearer with the licensed frequency F1 of the cell3 (time T2 in fig. 17).

The activation notification may be signaling sent on the PDCCH of cell3 indicating activation of semi-persistent scheduling opportunity configuration, scrambled with C-RNTI assigned by UE1, UE2, UE3, respectively, on cell 3. The activation notification includes DL assignment information 1 and DL assignment information 2 assigned to UE1, UE2, and UE 3.

The activation notification may also be signaling sent on the PDCCH of cell3 scrambled with an activation schedule identification obtained from the cell3 broadcast in step 1201 or specified according to protocol standardization. The activation notification includes DL assignment information 1 and DL assignment information 2 that are allocated to UE1, UE2, and UE3 for shared use, and semi-static scheduling identities of UE1, UE2, and UE 3.

Step S1906, CCA detection;

The UE1, the UE2, and the UE3 perform CCA detection on the F2 at a CCA detection time (fig. 17CCA1) of a first idle time after receiving the activation notification, and this embodiment assumes that the AP1 is occupying a channel at this time, and the UE1 is close to the AP1, so that the UE1 detects that the F2 channel is busy, and the UE1 notifies the L-eNB1 that the channel is busy through an access link between the UE1 and the cell 3. While UE2, UE3 detects channel idle.

In step S1908, the L-eNB1 transmits data to the UE2 at time T3, T5.

At time T3, T5, L-eNB1, scrambled with the semi-persistent scheduling identity of UE2, indicates to use resource scheduling UE2 indicated by DL assignment information 1, and transmits data to UE2 on the resource indicated by DL assignment information 1, for scheduling control information carried by the PDCCH of cell 3; at time T4, T6, L-eNB1 indicates to use resource scheduling UE3 indicated by DL assignment information 2, scrambled with the semi-static scheduling identity of UE3, carried with the PDCCH of cell3, and transmits data to UE3 on the resource indicated by DL assignment information 2.

And the UE2 and the UE3 use the semi-persistent scheduling identifier of the UE to detect whether the scheduling control information scrambled by the semi-persistent scheduling identifier of the UE exists at the time from T3 to T6, and if the scheduling control information scrambled by the semi-persistent scheduling identifier of the UE exists, the UE directly receives data on the resource indicated by the DL assignment information indicated by the scheduling control information.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A data transmission method is characterized in that the method is applied to a multi-carrier scene, User Equipment (UE) has multi-carrier capability, the UE has the capability of communicating with a first cell controlled by a first base station, and the UE also has the capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps:

receiving a semi-persistent scheduling opportunity configured by a first base station and used for indicating the UE to perform data transmission with a second base station at a preset time, wherein the second base station and the UE perform data transmission through the unlicensed carrier;

receiving an activation notification sent by the first base station for activating the semi-persistent scheduling opportunity, wherein when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after interaction between the first base station and the second base station;

and carrying out data transmission with the second base station according to the activation notification.

2. The method of claim 1, wherein receiving the semi-persistent scheduling opportunity configured by the first base station to instruct the UE to perform data transmission with the second base station at a predetermined time comprises:

receiving a specific semi-static scheduling opportunity of the UE configured for the UE by the first base station;

and receiving a semi-static scheduling opportunity which is configured by the first base station for all the UE in the first cell where the UE is located and is common to the cells.

3. The method of claim 2, wherein the specific semi-persistent scheduling opportunity for the UE and the semi-persistent scheduling opportunity common to the cells each comprise a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter.

4. The method of claim 3,

the UE's specific semi-persistent scheduling opportunity further includes at least one of: a semi-static scheduling identifier, a hybrid automatic repeat request HARQ process which can be used by semi-static scheduling, an automatic deactivation semi-static scheduling opportunity timer, an automatic deactivation semi-static scheduling opportunity counter and a semi-static scheduling opportunity period starting point offset;

the semi-persistent scheduling opportunity common to the cells further comprises at least one of the following information: the method comprises the steps of semi-static scheduling identification, hybrid automatic repeat request (HARQ) processes which can be used in semi-static scheduling, automatic deactivation of semi-static scheduling opportunity timers, automatic deactivation of semi-static scheduling opportunity counters, semi-static scheduling opportunity period starting point bias and activation of scheduling identification.

5. The method of claim 3,

the semi-static scheduling opportunity period is less than or equal to a small data traffic burst statistical period transmitted by the UE; and/or the presence of a gas in the gas,

the semi-persistent scheduling opportunity period is less than or equal to a fixed frame period for performing listen before use of the device FBE based on a frame structure.

6. The method of claim 1, wherein the activation notification comprises an activation notification sent by the first base station to each UE or a common activation notification sent by the first base station for activating one or more UEs at a time, wherein,

when the UE receives an activation notification sent by the first base station to each UE, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station;

when the UE receives a common activation notification sent by the first base station to one or more UEs, the common activation notification includes semi-static scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs for transmitting downlink data with the second base station or uplink authorization information respectively allocated to each UE of the one or more UEs for transmitting uplink data with the second base station; after receiving the common activation notification, the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity;

when the UE receives a common activation notification sent by the first base station to one or more UEs, the common activation notification comprises: a semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, wherein the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification;

wherein, the downlink assignment information includes at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process allocated by the first base station for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation and coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting the uplink data;

and when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the UE monitors and receives the activation notification in a common search space of a Physical Downlink Control Channel (PDCCH) of the first base station by using an activation scheduling identifier, wherein the activation scheduling identifier is obtained from the received semi-persistent scheduling opportunity or is obtained according to protocol standard regulation.

7. The method of claim 6, wherein after the UE receives the activation notification sent by the first base station to each UE, the data transmission with the second base station according to the activation notification comprises at least one of:

detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing the resources indicated by the uplink authorization information to send data to the second base station in each semi-static scheduling opportunity within channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; when the detection result shows that the channel state is busy, transmitting data to the second base station by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time;

within the activation time of the semi-persistent scheduling opportunities, receiving data sent by the second base station on the resources indicated by the downlink assignment information directly at each semi-persistent scheduling opportunity;

detecting the channel state of the unlicensed carrier in idle channel detection time within semi-persistent scheduling opportunity activation time, and when the detection result shows that the channel state is idle, directly receiving data sent by the second base station on resources indicated by the downlink assignment information in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station;

wherein the semi-persistent scheduling opportunity activation time is a time from when the UE receives the activation notification to activate the semi-persistent scheduling opportunity until the semi-persistent scheduling opportunity is deactivated.

8. The method of claim 6, before the UE receives the activation notification sent by the first base station to each UE, further comprising:

detecting the channel state of the unauthorized carrier at the idle channel detection time;

and when the detection result shows that the channel state is idle, sending request information for requesting activation of the semi-static scheduling opportunity to the first base station, wherein when the first base station and the second base station are different base stations, the request information is sent to the second base station through the first base station.

9. The method of claim 6, wherein when the UE receives a common activation notification sent by the first base station to one or more UEs, and the common activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, the data transmission with the second base station according to the activation notification includes at least one of:

detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing resources, which are correspondingly allocated to the uplink authorization information of the UE in the common activation notification, to send data to the second base station in each semi-static scheduling opportunity within channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; when the detection result shows that the channel state is busy, transmitting data to the second base station by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time;

within the activation time of the semi-persistent scheduling opportunities, directly receiving data sent by the second base station on resources corresponding to the downlink assignment information indication allocated to the UE at each semi-persistent scheduling opportunity;

detecting the channel state of the unlicensed carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result indicates that the channel state is idle, receiving data sent by the second base station in each semi-persistent scheduling opportunity directly on a resource indicated by downlink assignment information which is correspondingly allocated to the UE in an activation notification within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station;

10. The method according to claim 6, wherein before the UE receives a common activation notification sent by the first base station to one or more UEs, and the common activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, further comprising:

detecting a channel state of the unlicensed carrier;

11. The method of claim 6, wherein after the UE receives a common activation notification allocated by the first base station for one or more UEs, the common activation notification comprises: the semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, where when the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification, performing data transmission with the second base station according to the activation notification includes at least one of:

within the activation time of the semi-persistent scheduling opportunities, receiving data sent by the second base station on resources indicated by the one or more downlink assignment information included in the activation notification at each semi-persistent scheduling opportunity directly;

detecting the channel state of the unlicensed carrier in idle channel detection time within semi-persistent scheduling opportunity activation time, and when the detection result indicates that the channel state is idle, receiving data sent by the second base station in each semi-persistent scheduling opportunity directly on resources indicated by the one or more downlink assignment information included in the common activation notification within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, sending a message of channel busy to the first base station, wherein when the first base station and the second base station are different base stations, the message of channel busy is sent to the second base station through the first base station;

receiving scheduling control information which is sent by the first base station and used for indicating the corresponding use relation of the one or more downlink assignment information and the one or more UE after the second base station determines that the channel state of the unlicensed carrier is idle; receiving data sent by the second base station directly on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information;

detecting the channel state of the unlicensed carrier within semi-persistent scheduling opportunity activation time, and when the detection result indicates that the channel state is idle, directly receiving data sent by a second base station on a resource indicated by downlink assignment information corresponding to the UE, which is indicated by scheduling control information sent by a first base station after the first base station determines that the channel state of the unlicensed carrier is idle, wherein the scheduling control information is used for indicating corresponding usage relations between the one or more downlink assignment information and the one or more UEs; when the detection result is that the channel state is busy, sending a message that the channel is busy to the first base station, wherein when the first base station and the second base station are different base stations, the message that the channel is busy is sent to the second base station through the first base station;

12. The method of claim 11, wherein when receiving scheduling control information sent by the first base station to indicate the one or more downlink assignment information and the corresponding usage relationship of the one or more UEs after the second base station determines that the channel status of the unlicensed carrier is idle,

in one scheduling opportunity, the scheduling control information indicates that a plurality of UEs use different downlink assignment information respectively;

in different scheduling opportunities, the scheduling control information indicates that the same UE uses the same downlink assignment information;

in different scheduling opportunities, the scheduling control information indicates that the same UE uses different downlink assignment information;

wherein the UE and the downlink assignment information are the UE and the downlink assignment information included in the activation notification.

13. A data transmission method is characterized in that a first base station controls a first cell, the first base station configures a second cell controlled by a second base station for User Equipment (UE) with multi-carrier capability, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps:

configuring a semi-persistent scheduling opportunity for User Equipment (UE) to indicate the UE to perform data transmission with the second base station at a preset time, wherein the second base station and the UE perform data transmission through an unlicensed carrier;

transmitting an activation notification to the UE for activating the semi-persistent scheduling opportunity;

wherein, when the first base station and the second base station are different base stations, the first base station sends the activation notification after interacting with the second base station.

14. The method of claim 13, wherein configuring the semi-persistent scheduling opportunity for the UE to indicate that the UE performs data transmission with the second base station at a predetermined time comprises one of:

configuring a specific semi-persistent scheduling opportunity of the UE for the UE;

configuring a semi-static scheduling opportunity common to cells for all the UEs in the first cell where the UE is located.

15. The method of claim 14, wherein the UE-specific semi-persistent scheduling opportunity and the semi-persistent scheduling opportunity common to the cells each comprise a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter.

16. The method of claim 15,

the UE's specific semi-persistent scheduling opportunity further includes at least one of: the method comprises the steps of monitoring a semi-static scheduling identifier of a semi-static scheduling notification, a hybrid automatic repeat request (HARQ) process which can be used for semi-static scheduling, automatically deactivating a semi-static scheduling opportunity timer, automatically deactivating a semi-static scheduling opportunity counter and offsetting a semi-static scheduling opportunity period starting point;

17. The method of claim 15,

18. The method of claim 13, wherein the activation notification comprises an activation notification sent by the first base station to each UE or a common activation notification sent by the first base station for activating one or more UEs at a time, wherein,

when the first base station sends an activation notification to each UE, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station;

when the first base station sends a common activation notification for activating one or more UEs at one time, the activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, where the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification;

when the first base station sends a common activation notification for activating one or more UEs at once, the activation notification includes: a semi-static scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station;

wherein, the downlink assignment information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process for transmitting the uplink data;

when the first base station sends a common activation notice for activating one or more UEs at one time, the first base station scrambles the activation notice by using an activation scheduling identifier, wherein the activation scheduling identifier is configured by the first base station when configuring a semi-static scheduling opportunity for the UE or is obtained according to protocol standard specification.

19. The method of claim 18,

when the first base station sends an activation notification to each UE respectively, the first base station sends the activation notification to each UE by at least one of the following modes: scrambling the activation notification by using the cell radio network temporary identifier of each UE, and sending the scrambled activation notification on a Physical Downlink Control Channel (PDCCH); scrambling the activation notification by using the semi-static scheduling identifier of each UE, and sending the scrambled activation notification on a Physical Downlink Control Channel (PDCCH);

when the first base station sends a common activation notice for activating one or more UEs at once, the first base station scrambles the activation notice by an activation scheduling identification, wherein the activation scheduling identification is configured by the first base station when configuring a semi-static scheduling opportunity or obtained according to protocol standard regulation.

20. The method of claim 13, wherein after sending the activation notification to the UE, further comprising:

receiving a message which is sent by the UE and used for indicating that the channel state of the unauthorized carrier is busy;

notifying the second base station of the message.

21. The method of claim 13, wherein after configuring a semi-persistent scheduling opportunity for a User Equipment (UE) to instruct the UE to perform data transmission with the second base station at a predetermined time, before sending the activation notification for activating the semi-persistent scheduling opportunity to the UE, the method further comprises,

receiving request information which is sent by the UE and used for requesting to activate the semi-static scheduling opportunity;

and notifying the request information to the second base station.

22. A data transmission method is characterized in that the method is applied to a multi-carrier scene, a second base station controls a second cell, the second cell is configured to User Equipment (UE) with multi-carrier capability through a first cell controlled by a first base station through the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the method comprises the following steps:

receiving uplink data sent by User Equipment (UE) after a semi-static scheduling opportunity for indicating the UE to perform data transmission with a second base station in preset time is activated; and/or the presence of a gas in the gas,

transmitting downlink data to the UE after a semi-persistent scheduling opportunity for indicating the UE to perform data transmission with a second base station at a preset time is activated;

wherein the semi-static scheduling opportunity is configured by the first base station; sending, by the first base station, the activation notification to the UE to activate the semi-persistent scheduling opportunity, the activation notification being sent by the first base station after interacting with the second base station when the first base station and the second base station are different base stations; and carrying out data transmission between the second base station and the UE through an unauthorized carrier, wherein the number of the UE is one or more.

23. The method of claim 22, wherein the semi-static scheduling opportunity comprises one of:

the first base station configures a specific semi-static scheduling opportunity of the UE for the UE;

the first base station is a semi-static scheduling opportunity which is configured by all the UE in the first cell where the UE is located and is common to the cells.

24. The method of claim 23, wherein the UE-specific semi-persistent scheduling opportunity and the semi-persistent scheduling opportunity common to the cells each comprise a semi-persistent scheduling opportunity period or a semi-persistent scheduling subframe bitmap parameter.

25. The method of claim 24,

26. The method of claim 24,

the semi-static scheduling opportunity period is less than or equal to a fixed frame period of the device FBE after monitoring is performed based on a frame structure.

27. The method of claim 22, wherein the activation notification comprises an activation notification sent by the first base station to each UE or a common activation notification sent by the first base station for activating one or more UEs at a time, wherein,

when the activation notification is an activation notification that is respectively sent by the first base station to each UE, the activation notification includes: downlink assignment information for transmitting downlink data between the UE and the second base station or uplink grant information for transmitting uplink data between the UE and the second base station;

when the activation notification is a common activation notification sent by the first base station and used for activating one or more UEs at one time, the common activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the common activation notification further includes downlink assignment information respectively allocated to each UE of the one or more UEs and used for transmitting downlink data with the second base station or uplink grant information respectively allocated to each UE of the one or more UEs and used for transmitting uplink data with the second base station, where the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification;

when the activation notification is a common activation notification which is sent by the first base station and can be used for activating one or more UEs at one time, the common activation notification comprises: a semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, wherein the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification;

wherein, the downlink assignment information includes at least one of a physical resource block, a modulation coding level and a hybrid automatic repeat request (HARQ) process allocated by the first base station for transmitting the downlink data; the uplink authorization information comprises at least one of a physical resource block, a modulation and coding level and a hybrid automatic repeat request (HARQ) process which are allocated by the first base station and used for transmitting the uplink data.

28. The method of claim 27, wherein when the activation notification is an activation notification sent by the first base station to each UE, receiving the uplink data sent by the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated comprises:

within the activation time of the semi-persistent scheduling opportunities, directly receiving data sent by the UE on the resources indicated by the uplink authorization information at each semi-persistent scheduling opportunity;

detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-static scheduling opportunities, and when the detection result shows that the channel state is idle, directly receiving data sent by the UE on resources indicated by the uplink authorization information at each semi-static scheduling opportunity within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, sending a message of channel busy to the UE.

29. The method of claim 27, wherein when the activation notification is an activation notification sent by the first base station to each UE, sending downlink data to the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated comprises at least one of:

detecting the channel state of the unauthorized carrier in idle channel detection time within semi-static scheduling opportunity activation time, and directly utilizing the resource indicated by the downlink assignment information to send data to the UE in channel occupation time after the idle channel detection time when the detection result indicates that the channel state is idle; and when the detection result shows that the channel state is busy, not sending data to the UE at each semi-static scheduling opportunity within the channel occupation time after the idle channel detection time.

30. The method according to claim 27, wherein when the activation notification is an activation notification that is sent by the first base station to each UE, before receiving uplink data sent by a user equipment UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with a second base station at a predetermined time is activated and/or sending downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated, the method further includes:

receiving, by the first base station, request information for requesting activation of the semi-persistent scheduling opportunity, which is sent by the UE after determining that a channel state of the unlicensed carrier is in an idle state; transmitting, by a first base station, an activation notification for activating the semi-persistent scheduling opportunity to the UE; and/or the presence of a gas in the gas,

detecting a channel status of the unlicensed carrier before or after receiving, by the first base station, request information for requesting activation of the semi-persistent scheduling opportunity, which is transmitted by the UE; and when the detection result is that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

31. The method of claim 27, wherein when the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, the activation notification includes semi-persistent scheduling identifiers of the one or more UEs, and the activation notification further includes downlink assignment information allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information allocated to each of the one or more UEs for transmitting uplink data with the second base station, respectively, receiving the uplink data sent by the UE after the semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated comprises:

within the activation time of the semi-persistent scheduling opportunities, each semi-persistent scheduling opportunity directly receives data sent by the UE on a resource indicated by uplink authorization information correspondingly allocated to the UE in the activation notification;

detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result is that the channel state is idle, receiving data sent by the UE on resources indicated by uplink authorization information which is correspondingly allocated to the UE in the activation notification in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, sending a message of channel busy to the UE.

32. The method of claim 27, wherein when the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, the activation notification includes semi-persistent scheduling identities of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, the sending of downlink data to the UE after the semi-persistent scheduling opportunity indicating that the UE performs data transmission with the second base station at a predetermined time is activated comprises at least one of:

detecting the channel state of the unauthorized carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result shows that the channel state is idle, transmitting data to the UE in each semi-persistent scheduling opportunity by directly using resources indicated by downlink assignment information correspondingly allocated to the UE in the activation notification within channel occupation time after the idle channel detection time; and when the detection result shows that the channel state is busy, transmitting data to the UE by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time.

33. The method of claim 27, wherein when the activation notification is a common activation notification sent by the first base station and used for activating one or more UEs at a time, the activation notification includes a semi-persistent scheduling identifier of the one or more UEs, and the activation notification further includes downlink assignment information respectively allocated to each of the one or more UEs for transmitting downlink data with the second base station or uplink grant information respectively allocated to each of the one or more UEs for transmitting uplink data with the second base station, the uplink data sent by a UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated and/or the downlink data sent by the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated is received, and/or the UE sends downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with the second base station at a predetermined time is activated Before, still include:

receiving, by a first base station, request information, which is sent to the first base station by the UE after determining that a channel state of the unlicensed carrier is in an idle state, for requesting activation of the semi-persistent scheduling opportunity; transmitting, by a first base station, an activation notification for activating the semi-persistent scheduling opportunity to the UE; and/or the presence of a gas in the gas,

detecting a channel state of the unlicensed carrier before or after receiving request information for requesting activation of the semi-persistent scheduling opportunity, which is sent by the UE, through a first base station; and when the detection result shows that the channel state is idle, sending an activation notification for activating the semi-static scheduling opportunity to the UE through the first base station.

34. The method of claim 27, wherein the activation notification is a common activation notification sent by the first base station and available for activating one or more UEs at a time, and the activation notification comprises: the semi-persistent scheduling identifier of the one or more UEs and one or more downlink assignment information for downlink data transmission between the one or more UEs and the second base station, where when the UE indicated by the semi-persistent scheduling identifier activates a semi-persistent scheduling opportunity after receiving the common activation notification, sending downlink data to the UE after the semi-persistent scheduling opportunity for indicating the UE to perform data transmission with the second base station at a predetermined time is activated includes at least one of:

detecting the channel state of the unlicensed carrier in idle channel detection time within activation time of semi-persistent scheduling opportunities, and when the detection result indicates that the channel state is idle, directly transmitting data to the UE by using a resource indicated by one of the one or more downlink assignment information included in the activation notification in each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time; when the detection result shows that the channel state is busy, transmitting data to the UE by each semi-static scheduling opportunity which is not in the channel occupation time after the idle channel detection time;

detecting a channel state of the unlicensed carrier at idle channel detection time within semi-persistent scheduling opportunity activation time, and when a detection result is that the channel state is idle, transmitting scheduling control information used for indicating the one or more downlink assignment information and corresponding usage relations of the one or more UEs to the UEs at each semi-persistent scheduling opportunity within channel occupation time after the idle channel detection time, wherein the scheduling control information is used for the UEs to receive data transmitted by the second base station; and sending data to the UE on the resource indicated by the downlink assignment information corresponding to the UE indicated by the scheduling control information.

35. The method of claim 34, wherein when each semi-persistent scheduling opportunity transmits scheduling control information indicating the one or more downlink assignment information and the corresponding usage relationship of the one or more UEs to the UEs,

36. A data transmission device is characterized in that the data transmission device is applied to a multi-carrier scene, User Equipment (UE) has multi-carrier capability, the UE has the capability of communicating with a first cell controlled by a first base station, and the UE also has the capability of communicating with a second cell controlled by a second base station; the second cell is configured by the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises:

a first receiving module, configured to receive a semi-persistent scheduling opportunity configured by a first base station and used to instruct the UE to perform data transmission with a second base station at a predetermined time, where the second base station and the UE perform data transmission through an unlicensed carrier;

a second receiving module, configured to receive an activation notification sent by the first base station and used for activating the semi-persistent scheduling opportunity, where, when the first base station and the second base station are different base stations, the activation notification is sent by the first base station after interaction between the first base station and the second base station;

and the transmission module is used for carrying out data transmission with the second base station according to the activation notification.

37. A data transmission device is characterized in that a first base station controls a first cell, the first base station configures a second cell controlled by a second base station for User Equipment (UE) with multi-carrier capability, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises:

a configuration module, configured to configure a semi-persistent scheduling opportunity for a user equipment UE, where the semi-persistent scheduling opportunity is used to instruct the UE to perform data transmission with the second base station at a predetermined time, and the second base station and the UE perform data transmission through an unlicensed carrier;

a first sending module, configured to send an activation notification for activating the semi-persistent scheduling opportunity to the UE;

38. A data transmission device is characterized in that the data transmission device is applied to a multi-carrier scene, a second base station controls a second cell, the second cell is configured to User Equipment (UE) with multi-carrier capability through a first cell controlled by a first base station through the first base station, the first cell uses a first carrier, the first carrier is an authorized carrier, the second cell uses a second carrier, and the second carrier is an unauthorized carrier; the first base station and the second base station are the same or different, and the device comprises:

a third receiving module, configured to receive uplink data sent by a UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with a second base station at a predetermined time is activated; and/or the presence of a gas in the gas,

a second sending module, configured to send downlink data to the UE after a semi-persistent scheduling opportunity for instructing the UE to perform data transmission with a second base station at a predetermined time is activated;