CN106304371B - Data transmission method, device, terminal, base station and system - Google Patents

Data transmission method, device, terminal, base station and system Download PDF

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Publication number
CN106304371B
CN106304371B CN201510250556.0A CN201510250556A CN106304371B CN 106304371 B CN106304371 B CN 106304371B CN 201510250556 A CN201510250556 A CN 201510250556A CN 106304371 B CN106304371 B CN 106304371B
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scheduling
dci
serving cell
unlicensed spectrum
data
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CN106304371A (en
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杨维维
戴博
梁春丽
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2016/075491 priority patent/WO2016184220A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1221—Wireless traffic scheduling based on age of data to be sent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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

Abstract

The invention discloses a data transmission method, a device, a terminal, a base station and a system, wherein the method comprises the following steps: in the implementation, a node determines Downlink Control Information (DCI) corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling mode; and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI. The problem that the frequency of blind detection of downlink control information of a terminal is increased due to hybrid scheduling is solved.

Description

Data transmission method, device, terminal, base station and system
Technical Field
The present invention relates to communications technologies, and in particular, to a data transmission method, an apparatus, a terminal, a base station, and a system.
Background
In the process of communication technology development, with the rapid increase of data services, the licensed spectrum cannot bear a huge amount of data, that is, the unlicensed spectrum shares data traffic in the licensed carrier, which is an important evolution direction of the subsequent LTE development.
Fig. 1(a) is a schematic diagram of a prior art data transmission method according to an embodiment of the present invention. Fig. 1(b) is a schematic diagram of a data transmission method according to a second embodiment of the present invention. In the existing LTE system, 2 scheduling modes of self-scheduling and cross-carrier scheduling are supported. For the licensed assisted access LAA serving cell, a self-scheduling/cross-carrier hybrid scheduling manner is considered, for example, one of the self-scheduling/cross-carrier hybrid scheduling manners is to support uplink configuration cross-carrier scheduling, while downlink configuration is self-scheduling, as shown in fig. 1(a), or one of the self-scheduling and downlink configuration cross-carrier scheduling, as shown in fig. 1(b), is configured for uplink. If self-scheduling/cross-carrier hybrid scheduling is supported, the number of blind detections of the terminal is increased, which is illustrated in fig. 1 (a). If the terminal only needs to blindly detect the downlink control information corresponding to the uplink/downlink data of the auxiliary service cell on the main service cell or the auxiliary service cell according to the existing scheduling mode. If uplink cross-carrier scheduling and downlink self-scheduling are configured, the terminal needs to blindly detect downlink control information corresponding to downlink data of the auxiliary serving cell in the main serving cell and blindly detect downlink control information corresponding to uplink data of the auxiliary serving cell in the auxiliary serving cell.
In the implementation process of the prior art, the number of blind detection times is increased, which will increase the false detection rate of the control signaling and increase the power consumption of the terminal.
Disclosure of Invention
In order to solve the technical problem, the invention provides a data transmission method, a data transmission device, a terminal, a base station and a data transmission system, which can solve the problem of excessive terminal detection times.
In order to achieve the object of the present invention, the present invention provides a data transmission method, including:
the node determines Downlink Control Information (DCI) corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling mode;
and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI.
Further, the predefined scheduling manner includes at least one of the following: a scheduling mode of a subframe, a scheduling mode of a downlink control information type, a scheduling mode of a downlink control information candidate set, and a scheduling mode based on a carrier.
Further, the predefined scheduling manner includes: a scheduling mode of the subframe;
the node determines the DCI according to a predefined scheduling mode, including:
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to the modes of cross-carrier scheduling and self-scheduling time division configuration.
Further, the determining, by the node, DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling time division configuration manner includes:
and determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling.
Further, the determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling includes:
predefining the at least one downlink subframe;
determining the at least one downlink subframe through signaling or signals;
determining the at least one downlink subframe by listening-before-talk, LBT, in which the subframe is located.
Further, the determining, by signaling or a signal, the at least one downlink subframe includes at least one of:
determining the at least one downlink subframe through a high-level signaling; ,
and determining the at least one downlink subframe through the occupation signal.
Further, the subframe where the LBT is located is a subframe where a clear channel assessment CCA is located in a frame-based device FBE mechanism, or
And the subframe where the LBT is located is indicated by a downlink control information format DCI format M.
Further, the DCI format M includes at least one of:
the DCI format M size is the same as DCI format 1A;
the DCI format M is scrambled through a new RNTI;
the DCI format M at least comprises subframe indication information, and the size of the subframe indication information is related to the candidate position of the subframe where the LBT is located.
Further, the determining the at least one downlink subframe by using the occupancy signal includes:
before detecting an occupied signal, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling;
and after detecting the occupied signal, the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to self-scheduling.
Further, the node determines, through the LBT subframe, at least one downlink subframe corresponding to the cross-carrier scheduling or the self-scheduling, including:
the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling before an LBT subframe n or a subframe n + k;
the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to self-scheduling after an LBT subframe n or a subframe n + k,
wherein k is a positive integer greater than 0.
Further, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling after the channel occupancy time COT.
Further, the predefined scheduling manner includes: scheduling mode of downlink control information type;
the node determines the DCI according to a predefined scheduling mode, including:
the node determines Downlink Control Information (DCI) corresponding to serving cell data on an unlicensed spectrum according to a mode of distinguishing and configuring DCI format according to cross-carrier scheduling and self-scheduling; alternatively, the first and second electrodes may be,
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode.
Further, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to a method of allocating and distinguishing configuration DCI format according to cross-carrier scheduling and self-scheduling, including:
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format1A, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 2X; alternatively, the first and second electrodes may be,
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format2X, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 1A; the DCI format2X is one of downlink control information formats 2/2a/2B/2C/2D, and specifically depends on a transmission mode configured by a serving cell on an unlicensed spectrum.
Further, the node discriminatively configures an enhanced downlink physical control channel (EPDCCH) resource block pair aggregation mode according to cross-carrier scheduling and self-scheduling, and determines DCI corresponding to serving cell data on an unlicensed spectrum, including:
the node determines DCI (downlink control information) corresponding to cross-carrier scheduling of service cell data on an unlicensed spectrum through an EPDCCH (enhanced physical downlink control channel) resource block pair set x;
and the node determines the DCI corresponding to self-scheduling of the serving cell data on the unlicensed spectrum through the EPDCCH resource block pair set y.
Further, the predefined scheduling manner includes: scheduling mode of the downlink control information candidate set;
the node determines the DCI according to a predefined scheduling mode, including:
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a mode that the scheduling information of the uplink data and the scheduling information of the downlink data of the serving cell on the unlicensed spectrum share the candidate set of the user special search space.
Further, the predefined scheduling manner includes: a carrier-based scheduling manner;
the node determines the DCI according to a predefined scheduling mode, including:
and determining DCI corresponding to the serving cell data on the unlicensed spectrum on part of the serving cells according to cross-carrier scheduling.
The invention provides a data transmission device, comprising:
a determining module, configured to determine, according to a predefined scheduling manner, downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum;
and the processing module is used for processing the data of the service cell on the unlicensed spectrum according to the DCI.
Further, the predefined scheduling manner includes at least one of the following: a scheduling mode of a subframe, a scheduling mode of a downlink control information type, a scheduling mode of a downlink control information candidate set, and a scheduling mode based on a carrier.
Further, the predefined scheduling manner includes: a scheduling mode of the subframe;
the determining module is specifically configured to determine DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling time division configuration manner.
Further, the predefined scheduling manner includes: scheduling mode of downlink control information type;
the determining module is specifically configured to determine downlink control information DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling DCI format differentiated configuration mode; or, according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode, determining DCI corresponding to serving cell data on an unlicensed spectrum.
Further, the predefined scheduling manner includes: scheduling mode of the downlink control information candidate set;
the determining module is specifically configured to determine DCI corresponding to the serving cell data on the unlicensed spectrum in a manner that the scheduling information of the uplink data and the scheduling information of the downlink data of the serving cell share the candidate set of the user-specific search space on the unlicensed spectrum.
Further, the predefined scheduling manner includes: a carrier-based scheduling manner;
the determining module is specifically configured to determine DCI corresponding to serving cell data in an unlicensed spectrum according to cross-carrier scheduling in a part of serving cells.
The present invention provides a terminal, including: a data transfer apparatus as claimed in any preceding claim.
The present invention provides a base station, comprising: a data transfer apparatus as claimed in any preceding claim.
The invention provides a data transmission system, comprising: a terminal as claimed in the above and a base station as claimed in claim 24.
Compared with the prior art, the downlink control information DCI corresponding to the data of the serving cell on the unlicensed spectrum is determined by the node according to the predefined scheduling mode; and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI. The problem that the number of times of blind detection of the downlink control information by the terminal is increased is solved, so that the false detection rate of the downlink control information is reduced
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1(a) is a diagram illustrating a prior art data transmission method according to an embodiment of the present invention;
FIG. 1(b) is a diagram illustrating a data transmission method according to a second embodiment of the present invention;
FIG. 2 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;
FIG. 3(a) is a diagram illustrating a data transmission method according to a second embodiment of the present invention;
FIG. 3(b) is a diagram of a data transmission method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, 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.
The network element checking method and the device thereof provided by the embodiment of the invention can be particularly applied to parameter configuration of the network element when the network is abnormal. The network element checking device provided by this embodiment may be integrated in a network manager or any server with network management, and the network element checking device may be implemented in a software and/or hardware manner. The network element checking method and the device thereof provided by the present embodiment are explained in detail below.
Fig. 2 is a schematic flow chart of an embodiment of a data transmission method of the present invention, as shown in fig. 2, the data transmission method includes:
step 201, the node determines downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling mode.
The node in this embodiment may be a terminal or a base station.
The node of this embodiment may be a terminal, and specifically, the terminal determines downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling manner;
optionally, the node of this embodiment may be a base station, and specifically, the base station determines how to configure downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling manner.
Step 202, the node processes the data of the serving cell on the unlicensed spectrum according to the DCI.
In this embodiment, the node is a terminal, that is, the terminal receives/transmits data in the serving cell on the unlicensed spectrum according to the DCI.
In this embodiment, the node is a base station, that is, the base station transmits/receives data in a serving cell on an unlicensed spectrum according to the DCI.
In this embodiment, the scheduling manner includes at least one of the following: a scheduling mode of a subframe, a scheduling mode of a downlink control information type, a scheduling mode of a downlink control information candidate set, and a scheduling mode based on a carrier.
For example, the scheduling method includes: a scheduling mode of the subframe;
the node determines the DCI according to a predefined scheduling mode, including:
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to the modes of cross-carrier scheduling and self-scheduling time division configuration.
Further, the determining, by the node, DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling time division configuration manner includes:
and determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling.
Further, the determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling includes:
predefining the at least one downlink subframe;
determining the at least one downlink subframe through signaling or signals;
determining the at least one downlink subframe through an LBT subframe.
Optionally, further, the determining, through signaling or a signal, the at least one downlink subframe includes at least one of:
determining the at least one downlink subframe through a high-level signaling; ,
and determining the at least one downlink subframe through the occupation signal.
Optionally, further, the LBT subframe is a subframe in which CCA is located in the FBE mechanism, or
The LBT subframe is indicated by DCI format M.
Further, the DCI format M includes at least one of:
the DCI format M size is the same as DCI format 1A;
the DCI format M is scrambled through a new RNTI;
the DCI format M at least comprises subframe indication information, and the size of the subframe indication information is related to candidate positions of an LBT subframe.
Further, the determining the at least one downlink subframe by using the occupancy signal includes:
before detecting an occupied signal, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling;
and after detecting the occupied signal, the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to self-scheduling.
Optionally, after the channel occupancy time COT, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling; further, the node determines at least one downlink subframe corresponding to the cross-carrier scheduling or the self-scheduling through the LBT subframe, including:
the node obtains DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling before an LBT subframe n or a subframe n + k, wherein k is a positive integer greater than 0;
and the node acquires DCI corresponding to the serving cell data on the unlicensed spectrum according to self-scheduling after the LBT subframe n or the subframe n + k.
Optionally, after the channel occupancy time COT, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling;
optionally, the predefined scheduling manner includes: scheduling mode of downlink control information type;
the node determines scheduling information according to a predefined scheduling mode, including:
the node determines Downlink Control Information (DCI) corresponding to serving cell data on an unlicensed spectrum according to a mode of distinguishing and configuring DCI format according to cross-carrier scheduling and self-scheduling; alternatively, the first and second electrodes may be,
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode.
Further, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to a method of allocating and distinguishing configuration DCI format according to cross-carrier scheduling and self-scheduling, including:
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format1A, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 2X; alternatively, the first and second electrodes may be,
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format2X, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 1A; the DCI format2X is one of downlink control information formats 2/2a/2B/2C/2D, and specifically depends on a transmission mode configured by a serving cell on an unlicensed spectrum.
Optionally, further, the node configures an enhanced downlink physical control channel EPDCCH resource block pair aggregation mode according to cross-carrier scheduling and self-scheduling differentiation, and determines DCI corresponding to serving cell data on an unlicensed spectrum, where the DCI includes:
the node determines DCI (downlink control information) corresponding to cross-carrier scheduling of service cell data on an unlicensed spectrum through an EPDCCH (enhanced physical downlink control channel) resource block pair set x;
and the node determines the DCI corresponding to self-scheduling of the serving cell data on the unlicensed spectrum through the EPDCCH resource block pair set y.
Optionally, the high-level signaling configures cross-carrier scheduling corresponding to the ePDCCH resource block pair set x, and the high-level signaling configures self-scheduling corresponding to the ePDCCH resource block pair set y
Optionally, the predefined scheduling manner includes: scheduling mode of the downlink control information candidate set;
the scheduling mode of the downlink control information candidate set comprises the following steps:
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a mode that the scheduling information of the uplink data and the scheduling information of the downlink data of the serving cell on the unlicensed spectrum share the candidate set of the user special search space.
Optionally, the predefined scheduling manner includes: a carrier-based scheduling manner;
the terminal determines downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling mode, and the method comprises the following steps:
and determining DCI corresponding to the serving cell data on the unlicensed spectrum according to cross-carrier scheduling on part of serving cells.
In the implementation, Downlink Control Information (DCI) corresponding to data of a serving cell on an unlicensed spectrum is determined by a node according to a predefined scheduling mode; and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI. The detection of the DCI under the unlicensed spectrum is realized, the times of detecting the scheduling information by the terminal are reduced, and the detection efficiency is further improved.
The scheduling method comprises the following steps: for example, the frame scheduling method specifically includes aggregating 2 carriers, where a primary carrier Pcell (or called primary serving cell) is an FDD serving cell and is located on a licensed spectrum, and a transmission mode TDD serving cell of a secondary carrier (or called secondary serving cell) is located on an unlicensed spectrum. Assume a self-scheduling/cross-carrier hybrid scheduling mode at this time, in which the terminal obtains scheduling information corresponding to serving cell data on an unlicensed spectrum according to the mode one.
Detailed description of the preferred embodiment
The method comprises the steps that cross-carrier uplink scheduling is carried out on a downlink subframe {3, 4} which is predefined, UE obtains DCI corresponding to SCell uplink data only on the downlink subframe {3, 4} according to uplink cross-carrier scheduling, and the UE obtains DCI format0 corresponding to SCell uplink data on other downlink subframes in a wireless frame according to uplink self-scheduling.
Detailed description of the invention
The UE obtains a downlink subframe {3, 4} through a high-level signaling to perform cross-carrier uplink scheduling, the UE obtains DCI corresponding to uplink data of the SCell only on the downlink subframe {3, 4} according to uplink cross-carrier scheduling, and the UE obtains DCI format0 corresponding to the uplink data of the SCell on other downlink subframes in a wireless frame according to an uplink cross-carrier self-scheduling mode.
The time division configuration in the first and second embodiments refers to time division configuration in one radio frame, cross-carrier scheduling and self-scheduling, and may also be configured in a semi-frame or in N radio frames.
Detailed description of the preferred embodiment
The UE detects an occupation signal sent by the eNB on a subframe #1, and the UE obtains DCI corresponding to SCell uplink data according to cross-carrier scheduling before the subframe #1, namely the DCI of the SCell uplink data is detected on the PCell in a blind mode; obtaining DCI corresponding to SCell uplink data according to self-scheduling after subframe #1, blindly detecting the DCI of the SCell uplink data on the SCell, and after the current channel occupation is finished, continuing blindly detecting the DCI of the SCell uplink data on the PCell;
detailed description of the invention
The UE obtains an LBT subframe on a subframe #1 according to the signaling, and the UE obtains DCI corresponding to SCell uplink data according to cross-carrier scheduling before the subframe #1 or the subframe #2, namely the DCI of the SCell uplink data is blindly detected on the PCell; obtaining DCI corresponding to SCell uplink data according to self-scheduling after subframe #1 or subframe #2, blindly detecting the DCI of the SCell uplink data on the SCell, and continuing blindly detecting the DCI of the SCell uplink data on the PCell after the current channel occupation is finished;
the signaling indicating the LBT subframe is carried through a DCI format M, the size of the DCI format M is the same as that of the DCI format1A, the DCI format M uses a new RNTI for scrambling, the DCI format M carries the LBT subframe indicating signaling control domain of a plurality of UEs, and the DCI format M is distinguished by a high-level signaling configuration index. Assuming that the positions of the LBT subframes are 14 possible, the LBT subframe indication uses 4 bits, wherein the states 1-14 represent the positions of the 14 LBT starting subframes, and the state 15 represents the resource preemption condition; the DCI format M may also include other control fields, preferably, an uplink and downlink configuration indication control field in eIMTA, and the LBT subframe indication field and the uplink and downlink configuration indication field may be jointly encoded;
the scheduling method comprises the following steps: the scheduling manner of the downlink control information type is taken as an example,
detailed description of the preferred embodiment
Fig. 3(a) is a schematic diagram of a data transmission method according to a second embodiment of the present invention. Fig. 3(b) is a schematic diagram of a data transmission method according to three embodiments of the present invention. As shown in fig. 3(a), there are 2 carriers for aggregation, where the primary carrier Pcell (or primary serving cell) is an FDD serving cell and is located on a licensed spectrum, and the transmission mode TDD serving cell of the secondary carrier (or secondary serving cell) is located on an unlicensed spectrum. Assuming that the self-scheduling/cross-carrier scheduling hybrid mode is configured and uplink is cross-carrier scheduling at this time, the SCell configures the transmission mode 10,.
At this time, the self-scheduling information corresponding to the downlink data on the SCell is only carried through the DCI format2D, that is, the UE obtains the self-scheduling DCI corresponding to the downlink data of the SCell only through the DCI format2D, the UE blindly detects the DCI format2D on the SCell, the self-scheduling information corresponding to the uplink data on the SCell is carried through the DCI format0 on the PCell, and the UE only needs to blindly detect the DCI format0 through a corresponding dedicated search space on the PCell and blindly detect the DCI format2D through a corresponding dedicated search space on the SCell, so the blind detection frequency is not increased. As shown in fig. 3(b), since the DCI format1A and the DCI format0 have the same size, if it is defined that cross-carrier scheduling information corresponding to downlink data on the SCell is only carried through DCI format1A, that is, the node obtains cross-carrier scheduled DCI corresponding to the downlink data of the SCell only through DCI format1A, the UE blindly detects DCI format1A and DCI format0 in a dedicated search space corresponding to the scheduling cell PCell, so the number of blind detections does not increase.
Detailed description of the invention
As shown in fig. 3(b), there are 2 carriers for aggregation, where the primary carrier Pcell (or primary serving cell) is an FDD serving cell and is located on a licensed spectrum, and the transmission mode TDD serving cell of the secondary carrier (or secondary serving cell) is located on an unlicensed spectrum. Assuming that the self-scheduling/cross-carrier scheduling hybrid mode is configured and uplink is self-scheduling at this time, the SCell configures the transmission mode 10.
At this time, the self-scheduling information corresponding to the downlink data on the SCell is only carried through DCI format1A, that is, the UE obtains the self-scheduled DCI corresponding to the downlink data of the SCell only through DCI format1A, the UE blindly detects DCI format1A on the SCell, the cross-carrier scheduling information corresponding to the downlink data on the SCell is only carried through DCI format2D, that is, the node obtains the cross-carrier scheduled DCI corresponding to the downlink data of the SCell only through DCI format2D, and the UE blindly detects DCI format2D on the scheduling cell PCell, because the sizes of DCI format1A and DCI format0 are the same, the blind detection frequency is not increased.
Detailed description of the preferred embodiment
There are 2 carriers for aggregation, where a primary carrier Pcell (or called primary serving cell) is an FDD serving cell and is located on a licensed spectrum, and a transmission mode TDD serving cell of a secondary carrier (or called secondary serving cell) SCell is located on an unlicensed spectrum. Assuming that a self-scheduling/cross-carrier hybrid scheduling scheme is configured at this time, the SCell configures transmission pattern 10, assuming that scheduling information is transmitted on the ePDCCH. Configuring ePDCCH resource block pair set 1 corresponding to cross-carrier scheduling by high-level signaling, and configuring ePDCCH resource block pair set 2 corresponding to self-scheduling by high-level signaling; the cross-carrier scheduling information corresponding to the uplink data on the SCell is only carried by the ePDCCH resource block pair set 1 on the PCell, that is, the UE obtains the cross-carrier scheduling information corresponding to the uplink data of the SCell only by detecting the ePDCCH resource block 1, or,
the self-scheduling information corresponding to the uplink data on the SCell is only carried by the ePDCCH resource block pair 2 on the SCell, that is, the node obtains the self-scheduling information corresponding to the uplink data of the SCell only by detecting the ePDCCH resource block 2, or,
the self-scheduling information corresponding to the downlink data on the SCell is only carried by the ePDCCH resource block pair set 2 on the SCell, that is, the node obtains the self-scheduling information corresponding to the downlink data of the SCell only by detecting the ePDCCH resource block 2, or
The cross-scheduling information corresponding to the downlink data on the SCell is only carried through the ePDCCH resource block pair set 1 on the PCell, that is, the node obtains the cross-carrier scheduling information corresponding to the uplink data of the SCell only by detecting the ePDCCH resource block 1.
The scheduling configuration mode comprises the following steps: for example, there are 2 carriers for aggregation, where a primary carrier Pcell (or called primary serving cell) is an FDD serving cell and is located on a licensed spectrum, and a transmission mode TDD serving cell of a secondary carrier (or called secondary serving cell) is located on an unlicensed spectrum. Assuming that a manner of configuring self-scheduling/cross-carrier hybrid scheduling is configured at this time, the SCell configures the transmission pattern 10.
The sum of the candidate set corresponding to the DCI format0 corresponding to the SCell uplink subframe and the candidate set corresponding to the DCI format1A corresponding to the SCell uplink data is 16, so that the UE blind detection times are the same as the self-scheduling/cross-carrier scheduling configured at the same time; the candidate set corresponding to the uplink subframe is preset to be 2, the UE performs blind detection on the downlink control information according to the candidate set to obtain DCI corresponding to the data, wherein the candidate set corresponding to the DCI format0 is 2 of the candidate sets corresponding to the aggregation level 1 or 2;
or, the sum of the candidate set corresponding to the DCI format0 corresponding to the uplink subframe on the SCell and the candidate set corresponding to the DCI format1A corresponding to the downlink data on the SCell is 32, and the sum of the candidate sets corresponding to the DCI format2D corresponding to the downlink data on the SCell is 32, so that the blind detection frequency of the UE is the same as the cross-carrier scheduling/self-scheduling configured at the same time, wherein the candidate number corresponding to the DCI format0 obtained according to the high layer is 2, and the UE performs blind detection on the downlink control information according to the candidate sets to obtain the DCI corresponding to the data; wherein, the candidate set corresponding to the DCI format0 is 2 of the candidate sets corresponding to aggregation level 1 or 2
Fig. 4 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention, and as shown in fig. 4, the data transmission device includes: a determination module 41 and a processing module 42, wherein,
a determining module 41, configured to determine, according to a predefined scheduling manner, downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum;
and a processing module 42, configured to process data of a serving cell on an unlicensed spectrum according to the DCI.
In the implementation, Downlink Control Information (DCI) corresponding to data of a serving cell on an unlicensed spectrum is determined by a node according to a predefined scheduling mode; and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI. The problem that the frequency of blind detection of the downlink control information by the terminal is increased due to hybrid scheduling is solved, and the false detection rate of the downlink control information is reduced.
On the basis of the above embodiment, the predefined scheduling manner includes at least one of the following: a scheduling mode of a subframe, a scheduling mode of a downlink control information type, a scheduling mode of a downlink control information candidate set, and a scheduling mode based on a carrier.
On the basis of the above embodiment, the predefined scheduling manner includes: a scheduling mode of the subframe;
the determining module 41 is specifically configured to determine DCI corresponding to uplink data or downlink data of a serving cell in an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling time division configuration manner.
Further, on the basis of the foregoing embodiment, the predefined scheduling manner includes: scheduling mode of downlink control information type;
the determining module 41 is specifically configured to determine downlink control information DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling DCI format differentiated configuration manner; or, according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode, determining DCI corresponding to serving cell data on an unlicensed spectrum.
Optionally, the predefined scheduling manner includes: scheduling mode of the downlink control information candidate set;
the determining module 41 is specifically configured to determine DCI corresponding to serving cell data on the unlicensed spectrum according to a manner that scheduling information of uplink data and scheduling information of downlink data of the serving cell share a candidate set of a user-specific search space on the unlicensed spectrum.
Optionally, on the basis of the foregoing embodiment, the predefined scheduling manner includes: a carrier-based scheduling manner;
the determining module is specifically configured to determine DCI corresponding to serving cell data in an unlicensed spectrum according to cross-carrier scheduling in a part of serving cells.
The present invention also provides a terminal, comprising: a data transmission arrangement as claimed in any one of figure 4.
The present invention also provides a base station, comprising: a data transmission apparatus as claimed in any one of claims 4.
The present invention also provides a data transmission system, comprising: a terminal as described above and a base station as described above.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (23)

1. A method of data transmission, comprising:
the node determines Downlink Control Information (DCI) corresponding to data of a serving cell on an unlicensed spectrum according to a predefined scheduling mode; wherein the predefined scheduling manner includes: a scheduling mode of the subframe; the node determines the DCI according to a predefined scheduling mode, including: the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a mode that the scheduling information of the uplink data and the scheduling information of the downlink data of the serving cell on the unlicensed spectrum share a candidate set of a user-specific search space;
and the node processes the data of the service cell on the unauthorized frequency spectrum according to the DCI.
2. The method of claim 1, wherein the predefined scheduling further comprises at least one of: scheduling mode of downlink control information type, scheduling mode of downlink control information candidate set, and scheduling mode based on carrier.
3. The method of claim 2, wherein the predefined scheduling comprises: a scheduling mode of the subframe;
the node determines the DCI according to a predefined scheduling mode, including:
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to the modes of cross-carrier scheduling and self-scheduling time division configuration.
4. The method of claim 3, wherein the node determines the DCI corresponding to the serving cell data on the unlicensed spectrum according to cross-carrier scheduling and self-scheduling time division configuration, and the determining comprises:
and determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling.
5. The method of claim 4, wherein the determining at least one downlink subframe corresponding to cross-carrier scheduling or self-scheduling comprises:
predefining the at least one downlink subframe;
determining the at least one downlink subframe through signaling or signals;
determining the at least one downlink subframe by listening-before-talk, LBT, in which the subframe is located.
6. The method according to claim 5, wherein the signaling or signaling to determine the at least one downlink subframe comprises at least one of:
determining the at least one downlink subframe through a high-level signaling;
and determining the at least one downlink subframe through the occupation signal.
7. The method of claim 5, wherein the LBT subframe is a subframe in which a clear channel assessment CCA is located in a frame-based device (FBE) mechanism, or
And the subframe where the LBT is located is indicated by a downlink control information format DCI format M.
8. The method of claim 7, wherein the DCI format M comprises at least one of:
the DCI format M size is the same as DCI format 1A;
the DCI format M is scrambled through a new RNTI;
the DCI format M at least comprises subframe indication information, and the size of the subframe indication information is related to the candidate position of the subframe where the LBT is located.
9. The method of claim 6, the determining the at least one downlink subframe via an occupancy signal, comprising:
before detecting an occupied signal, the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling;
and after detecting the occupied signal, the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to self-scheduling.
10. The method of claim 7, wherein the node determines at least one downlink subframe corresponding to the cross-carrier scheduling or self-scheduling through an LBT subframe, comprising:
the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to cross-carrier scheduling before an LBT subframe n or a subframe n + k;
and after the LBT subframe n or the subframe n + k, the node determines the DCI corresponding to the serving cell data on the unlicensed spectrum according to self-scheduling, wherein k is a positive integer greater than 0.
11. The method according to claim 9 or claim 10, wherein the node determines the DCI corresponding to the serving cell data on the unlicensed spectrum according to cross-carrier scheduling after the channel occupancy time COT.
12. The method of claim 2, wherein the predefined scheduling comprises: scheduling mode of downlink control information type;
the node determines the DCI according to a predefined scheduling mode, including:
the node determines Downlink Control Information (DCI) corresponding to serving cell data on an unlicensed spectrum according to a mode of distinguishing and configuring DCI format according to cross-carrier scheduling and self-scheduling; alternatively, the first and second electrodes may be,
and the node determines DCI corresponding to the serving cell data on the unlicensed spectrum according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode.
13. The method of claim 12, wherein the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to a DCI format differential configuration manner for cross-carrier scheduling and self-scheduling allocation, comprises:
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format1A, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 2X; alternatively, the first and second electrodes may be,
the node determines the DCI of cross-carrier scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format2X, and determines the DCI of self-scheduling corresponding to the downlink data of the serving cell on the unlicensed spectrum through the DCI format 1A; the DCI format2X is one of downlink control information formats 2/2a/2B/2C/2D, and specifically depends on a transmission mode configured by a serving cell on an unlicensed spectrum.
14. The method of claim 12, wherein the node determines DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling differential configuration enhanced downlink physical control channel (EPDCCH) resource block pair aggregation mode, comprising:
the node determines DCI (downlink control information) corresponding to cross-carrier scheduling of service cell data on an unlicensed spectrum through an EPDCCH (enhanced physical downlink control channel) resource block pair set x;
and the node determines the DCI corresponding to self-scheduling of the serving cell data on the unlicensed spectrum through the EPDCCH resource block pair set y.
15. The method of claim 2, wherein the predefined scheduling comprises: a carrier-based scheduling manner;
the node determines the DCI according to a predefined scheduling mode, including:
and determining DCI corresponding to the serving cell data on the unlicensed spectrum on part of the serving cells according to cross-carrier scheduling.
16. A data transmission apparatus, comprising:
a determining module, configured to determine, according to a predefined scheduling manner, downlink control information DCI corresponding to data of a serving cell on an unlicensed spectrum; wherein the predefined scheduling manner includes: a scheduling mode of the subframe; the determining module is specifically configured to determine DCI corresponding to serving cell data on an unlicensed spectrum in a manner that scheduling information of uplink data and scheduling information of downlink data of a serving cell on the unlicensed spectrum share a candidate set of a user-specific search space;
and the processing module is used for processing the data of the service cell on the unlicensed spectrum according to the DCI.
17. The apparatus of claim 16, wherein the predefined scheduling further comprises at least one of: scheduling mode of downlink control information type, scheduling mode of downlink control information candidate set, and scheduling mode based on carrier.
18. The apparatus of claim 17, wherein the predefined scheduling comprises: a scheduling mode of the subframe;
the determining module is specifically configured to determine DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling time division configuration manner.
19. The apparatus of claim 17, wherein the predefined scheduling comprises: scheduling mode of downlink control information type;
the determining module is specifically configured to determine downlink control information DCI corresponding to serving cell data on an unlicensed spectrum according to a cross-carrier scheduling and self-scheduling DCI format differentiated configuration mode; or, according to a cross-carrier scheduling and self-scheduling distinguishing configuration enhanced downlink physical control channel (EPDCCH) resource block pair set mode, determining DCI corresponding to serving cell data on an unlicensed spectrum.
20. The apparatus of claim 17, wherein the predefined scheduling comprises: a carrier-based scheduling manner;
the determining module is specifically configured to determine DCI corresponding to serving cell data in an unlicensed spectrum according to cross-carrier scheduling in a part of serving cells.
21. A terminal, comprising: a data transmission arrangement as claimed in any one of claims 16 to 20.
22. A base station, comprising: a data transmission arrangement as claimed in any one of claims 16 to 20.
23. A data transmission system, comprising: the terminal according to claim 21 and the base station according to claim 22.
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