WO2016070667A1

WO2016070667A1 - Data transmission method and apparatus

Info

Publication number: WO2016070667A1
Application number: PCT/CN2015/087272
Authority: WO
Inventors: 梁春丽; 戴博; 杨维维; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-11-06
Filing date: 2015-08-17
Publication date: 2016-05-12
Also published as: CN105577339A

Abstract

The present invention provides a data transmission method and apparatus, wherein, the method includes: detecting whether an unlicensed carrier is in an idle state, and under the circumstance that the detecting result is that the unlicensed carrier is in an idle state, performing data transmission on the unlicensed carrier. By means of the present invention, the problem in related art of lacking the related method for performing data transmission on the unlicensed carrier is solved, thus achieving the effect of implementing data transmission on the unlicensed carrier.

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 technique

Up to now, Long Term Evolution (LTE) is known to be deployed in licensed carriers. However, with the rapid growth of data services, in the near future, authorized carriers will no longer be able to withstand such huge amounts of data. Therefore, deploying LTE in an unlicensed carrier and sharing the data traffic in the authorized carrier through the unlicensed carrier is an important evolution direction of the subsequent LTE development.

In addition, there are many advantages for unlicensed carriers: free/low cost; low entry requirements and low cost, such as individuals and enterprises can participate in deployment, and equipment vendors can be arbitrarily; operating in multiple different systems. When the spectrum is in the spectrum, or when different operators of the same system operate in the unlicensed carrier, some shared resources can be considered to improve the spectrum efficiency; more wireless access technologies; more wireless access sites; more applications, from related data display In view of the above, multi-services are mentioned to be able to operate in unlicensed carriers, such as Machine to Machine (M2M) and Vehicle to Vehicle (V2V).

For the operation mode of the unlicensed carrier, usually by means of the authorized carrier, that is, the unlicensed carrier and the authorized carrier (operating in the LTE mode) work by carrier aggregation, which is called authorized carrier assisted access (Licensed) -Assistant Access, referred to as LAA). In addition, considering the unlicensed carrier, multiple systems will also work on the same spectrum, such as a WIFI system. Therefore, LTE works on unlicensed carriers, and it is crucial to solve coexistence problems with other systems. Moreover, in some countries and regions, there are corresponding regulatory policies for the use of unlicensed spectrum. Therefore, for the regulatory restrictions of unlicensed carriers, the corresponding data transmission method is formulated, which is an urgent problem to be solved by the LTE system using unlicensed carriers.

In view of the problem of the lack of related methods for data transmission on unlicensed carriers existing in the related art, an effective solution has not been proposed yet.

Summary of the invention

The present invention provides a data transmission method and apparatus to at least solve the problem of the lack of related methods of data transmission on an unlicensed carrier existing in the related art.

According to an aspect of the present invention, a data transmission method is provided, including: detecting whether an unlicensed carrier is in an idle state; and in a case where the detection result is that the unlicensed carrier is in an idle state, in the non-authorized load Data transmission in the wave.

Preferably, detecting whether the unlicensed carrier is in an idle state comprises: detecting whether the unlicensed carrier is in an idle state by using an idle time region of a listening subframe in a transmission frame, where the transmission frame includes a listening subframe And transmitting a subframe, the number of the listening subframe and the transmitting subframe are one or more, and the listening subframe includes one of: an idle time region; an idle time region and a data transmission region; The transmission subframe includes at least one of the following: a data transmission area; a data transmission area and an idle time area.

Preferably, performing data transmission in the unlicensed carrier comprises: performing data transmission in the unlicensed carrier by using a data transmission area of the interception subframe and the transmission subframe.

Preferably, the length of the transmission frame is fixed or configured according to a predetermined rule, wherein configuring the transmission frame according to a predetermined rule comprises at least one of: configuring a length of the transmission frame according to a high layer configuration parameter; National or regional regulations govern the length of the transmission frame for the regulation of unlicensed carriers.

Preferably, the location of the listening subframe in the transmission frame is fixed or configured.

Preferably, when the location of the listening subframe in the transmission frame is fixed, the listening subframe is located on a first predetermined number of subframes of the front end of the transmission frame or at the end of the transmission frame And a second predetermined number of subframes, wherein the first predetermined number and the second predetermined number are fixed or configured.

Preferably, detecting whether the unlicensed carrier is in an idle state comprises: detecting whether the unlicensed carrier is in an idle state on a plurality of the listening subframes in sequence, when the detecting is detected on one of the listening subframes When the unlicensed carrier is in the idle state, all the listening sub-frames and all the transmitted sub-frames after the listening sub-frame are used for data transmission.

Preferably, the length of the idle time region of the listening subframe is determined according to one of the following conditions: the length of the idle time region of the listening subframe is a fixed length; and the idle time region of the listening subframe The length is determined according to a predetermined parameter of the transmission frame; the length of the idle time region of the listening subframe is determined according to a data transmission situation of a third predetermined number of subframes preceding the listening subframe; The length of the idle time region of the listening subframe is the time required to detect whether the unlicensed carrier is in an idle state.

Preferably, when the length of the idle time region of the listening subframe is a time required to detect whether the unlicensed carrier is in an idle state, the length of the idle time region of the transmission subframe is determined according to one of the following conditions: The length of the idle time region of the transmission subframe is a fixed length; the length of the idle time region of the transmission subframe is determined according to a predetermined parameter of the transmission frame.

Preferably, the predetermined parameter of the transmission frame comprises: a length of a time zone in which data transmission is performed in the transmission frame.

Preferably, detecting, by using an idle time region in the listening subframe, whether the unlicensed carrier is idle The state includes: when the length of the idle time region in the listening subframe is fixed or determined according to a predetermined parameter of the transmission frame, detecting the unlicensed carrier at an end of the idle time region of the listening subframe Whether it is in an idle state, wherein after determining that the unlicensed carrier is in an idle state, data transmission is performed on a data transmission time region of the listening subframe.

Preferably, the data comprises at least one of: an authorized carrier assisted access LAA-specific signal, a LAA-specific channel, service data, wherein the LAA-specific signal comprises at least one of: for indicating channel occupancy A signal, a signal for achieving synchronization, a reference signal for channel measurement, the LAA-specific channel includes: a channel for indicating channel occupancy and/or a channel for carrying system messages.

Preferably, performing data transmission on the data transmission time region of the listening subframe includes at least one of: data transmission time of the listening subframe according to a length of a data transmission time region of the listening subframe Transmitting at least one of the following data: the LAA-specific signal, the LAA-specific channel, the service data; transmitting the LAA-specific signal and/or on a data transmission time region of the listening subframe Or the LAA proprietary channel.

Preferably, performing data transmission on a data transmission time region of the listening subframe according to a length of a data transmission time region of the listening subframe, including: a length of a data transmission time region of the listening subframe Transmitting the LAA over a data transmission time region of the listening subframe when the fourth predetermined number of orthogonal frequency division multiplexed OFDM symbols are greater than the length occupied by the LAA-specific signal and/or the LAA-specific channel a proprietary signal and/or the LAA-specific channel, which also transmits the service data; otherwise, transmitting the LAA-specific signal and/or LAA-specific channel on a data transmission time region of the listening subframe Or transmitting the business data.

Preferably, determining the number of the listening subframes and the length of time for data transmission in the listening subframe according to a result of detection of whether the unlicensed carrier is in an idle state, and/or according to a predetermined configuration The parameter determines the number of the transmitted subframes.

Preferably, when there is a service transmission requirement, the detection of whether the unlicensed carrier is in an idle state is performed at the beginning of the subframe, where the subframe is a listening subframe, if the current listening subframe is performed If the detection result of the unlicensed carrier is in the idle state does not satisfy the preset condition, the detection is continued in the next subframe, and the next subframe is also the listening subframe until the preset condition is met.

Preferably, detecting, in the listening subframe, whether the unlicensed carrier is in an idle state comprises at least one of: when at least a fifth predetermined number of OFDM symbols in the end of the listening subframe are unavailable for detecting When the unlicensed carrier is in an idle state, detecting whether the unlicensed carrier is in an idle state by using the remaining OFDM symbols except the fifth predetermined number of OFDM symbols at the end, and the detection result is not When the preset condition is met, the unlicensed carrier is detected in the next listening subframe of the listening subframe, where the length of the fifth predetermined number of OFDM symbols is at least LAA proprietary signal And/or the length occupied by the LAA-specific channel; when all OFDM symbols of the listening subframe support detecting whether the unlicensed carrier is in an idle state, using the listening subframe to perform the unauthorized Whether the carrier is in an idle state for detection.

Preferably, if at least a fifth predetermined number of OFDM symbols at the end of the listening subframe are unavailable for detecting whether the unlicensed carrier is in an idle state, at the completion time of completing the detection, the Performing data transmission on the time zone of the listening subframe end time includes at least one of: performing data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe, where the data The at least one of the following: an authorized carrier assisted access LAA-specific signal, a LAA-specific channel, and service data; and the LAA-specific signal and/or LAA is transmitted at the completion time to the end of the listening subframe There is a channel.

Preferably, performing data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe includes at least one of: when the completion time is included in the end time of the listening subframe Transmitting the LAA-specific signal on the included OFDM symbol when the length of the OFDM symbol is greater than the LAA-specific signal and/or the length occupied by the LAA-specific channel by a sixth predetermined number of OFDM symbols And/or the LAA-specific channel, which also transmits the service data, and transmits the service data on the first subframe after the listening subframe; when the completion time is included at the end of the listening subframe The length of the OFDM symbol is greater than the length occupied by the LAA-specific signal and/or the LAA-specific channel and is greater than the length of the LAA-specific signal and/or the LAA-specific channel and the sixth predetermined When the sum of the number of OFDM symbols is small, transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol, and transmitting the service on the first subframe after the listening subframe data.

Preferably, when all the OFDM symbols of the listening subframe support detecting whether the unlicensed carrier is in an idle state, after completing the detecting whether the unlicensed carrier is in an idle state, at least one of the following is further included And transmitting, according to the time zone of the completion time of the detection of the unlicensed carrier, to the time zone of the listening subframe end time, where the time zone from the completion time to the end time of the listening subframe includes The data transmission time zone of the listening subframe, the data comprising at least one of: an authorized carrier assisted access LAA proprietary signal, a LAA proprietary channel, service data; a data transmission time in the listening subframe Transmitting a predetermined portion of the LAA-specific signal and/or the LAA-specific channel on an OFDM symbol included in the region, transmitting the complete LAA-specific signal in a first subframe after the listening subframe And/or the LAA proprietary channel, after which the traffic data is transmitted.

Preferably, the method further includes at least one of: a length of the OFDM symbol included in a data transmission time region of the listening subframe is greater than a length occupied by the LAA-specific signal and/or the LAA-specific channel a sixth predetermined number of OFDM symbols, transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol while also transmitting service data, the first one after the listening subframe Transmitting service data on a subframe; when the length of the OFDM symbol included in a data transmission time zone of the listening subframe is greater than the LAA The proprietary signal and/or the LAA-specific channel occupy a large length and is smaller than the sum of the length of the LAA-specific signal and/or the LAA-specific channel and the sixth predetermined number of OFDM symbols Transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol, transmitting service data on a first subframe after the listening subframe; when the intercepting The data transmission time zone of the subframe includes the number of the OFDM symbols smaller than the LAA-specific signal and/or the number of OFDM symbols occupied by the LAA-specific channel, and is transmitted on the included OFDM symbol Predetermining a portion of the LAA-specific signal and/or the LAA-specific channel, transmitting the complete LAA-specific signal and/or the LAA-specific in a first subframe after the listening subframe Channel, after which the service data is transmitted.

Preferably, when the number of the OFDM symbols included in the data transmission area of the listening subframe is greater than or equal to the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel, Transmitting the complete LAA-specific signal and/or in the last OFDM symbol of the listening subframe that is equal to the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel The LAA-specific channel transmits the service data or the preset portion of the LAA-specific signal and/or the LAA-specific channel in remaining OFDM symbols.

Preferably, when the data transmission area of the listening subframe includes a non-integer multiple of the OFDM symbol, the time zone of the non-integer multiple OFDM symbol is used to transmit the part of the first complete OFDM symbol after the completion time repeat.

Preferably, when the data to be transmitted includes the synchronization signal of the Long Term Evolution (LTE) system, the data transmission in the unlicensed carrier by using the interception subframe and the transmission subframe includes at least one of the following: Transmitting the synchronization signal of the LTE system on the first transmission subframe after the detection of the unlicensed carrier is completed; transmitting the synchronization of the LTE system on a transmission subframe aligned with the subframe in which the carrier transmission synchronization channel is located a signal; transmitting a synchronization signal of the LTE system on a data transmission area of the listening subframe.

Preferably, in a case where the synchronization signal of the LTE system is transmitted on the first transmission subframe after the detection of the unlicensed carrier is completed, when the number of transmission subframes exceeds a seventh predetermined number of subframes, A synchronization signal of the LTE system is transmitted on an eighth predetermined number of subframes per interval from the first transmission subframe.

Preferably, the transmission subframe is used for downlink data transmission and/or uplink data transmission.

Preferably, when the transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, where the special subframe includes at least one of: a downlink pilot slot, an uplink and a downlink Conversion guard interval, uplink pilot time slot, idle time area.

Preferably, when the transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, where the listening subframe includes at least one of: a downlink pilot slot, and a downlink Line conversion guard interval, uplink pilot time slot, idle time area, data transmission area.

Preferably, the sum of the duration of the listening subframe and the special subframe is a preset value.

Preferably, the transmission frame sequence includes one of the following: a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot time slot and an uplink and downlink conversion protection interval. The listening subframe includes an idle time region, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; the downlink transmission subframe, the special subframe, and the uplink transmission subframe a sub-frame, where the special sub-frame includes a downlink pilot time slot and an uplink-downlink protection guard interval, where the listening sub-frame includes an uplink pilot time slot and an idle time area, the special subframe and the The sum of the durations of the listening subframes is the first preset time value; a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot An uplink/downlink protection interval and an uplink pilot time slot, where the listening subframe includes an idle time region, and a sum of durations of the special subframe and the listening subframe is the first preset time value. ; downlink transmission subframe, special subframe, a transmission subframe, a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and an uplink pilot slot, where the intercept subframe includes a data transmission region and an idle time region. The sum of the durations of the special subframe and the listening subframe is a second preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, where the interception The subframe includes an idle time zone and a downlink pilot time slot, where the special subframe includes an uplink and downlink transition protection time, and a sum of durations of the special subframe and the sounding subframe is the first preset time The value of the listening sub-frame, the downlink transmission sub-frame, the special sub-frame, and the uplink transmission sub-frame, where the listening sub-frame includes an idle time region and a downlink pilot time slot, where the special subframe includes uplink and downlink conversion protection. The sum of the duration of the special subframe and the duration of the listening subframe is the first preset time value; the listening subframe, the downlink transmission subframe, the special subframe, and the uplink Transmitting a subframe, wherein the listening subframe The uplink pilot time slot, the idle time zone, and the downlink pilot time slot, where the special subframe includes an uplink and downlink transition protection time, and the sum of the durations of the special subframe and the listening subframe is the a preset time value; a listening sub-frame, a downlink transmission sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time area and a data transmission area, where the special sub-frame includes a downlink guide The frequency slot, the uplink and downlink transition protection time, and the uplink pilot time slot, the sum of the durations of the special subframe and the listening subframe is the second preset time value; the listening subframe, the uplink transmission a sub-frame, a special sub-frame, and a downlink transmission sub-frame, where the listening sub-frame includes a downlink pilot time slot, an idle time zone, and an uplink pilot time slot, and the special time slot includes an uplink and downlink conversion protection time, where the special The sum of the durations of the subframe and the listening subframe is the first preset time value; the listening subframe, the uplink transmission subframe, the special subframe, and the downlink transmission subframe, where the listener Frame includes idle time zone and uplink pilot a slot, the special time slot includes an uplink and downlink transition protection time and a downlink pilot time slot, and the sum of the durations of the special subframe and the listening subframe is the first preset time value; the listening subframe, An uplink transmission subframe, a special subframe, and a downlink transmission subframe, where the interception subframe includes an idle time region and a data transmission region, and the special time slot includes an uplink pilot time slot, an uplink and downlink conversion protection time, and a downlink pilot. The time slot, the sum of the durations of the special subframe and the listening subframe is the second preset time value.

Preferably, when the transmission subframe is used for uplink and downlink data transmission, it is used for uplink data transmission. The subframe and the subframe for performing downlink data transmission are determined by at least one of: determining by semi-static high-layer signaling; indicating by dynamic signaling; determining by scheduling.

According to another aspect of the present invention, a data transmission apparatus is provided, including: a detection module configured to detect whether an unlicensed carrier is in an idle state; and a transmission module configured to detect that the unlicensed carrier is in an idle state In the case, data is transmitted in the unlicensed carrier.

According to the present invention, it is detected whether the unlicensed carrier is in an idle state; in the case that the unlicensed carrier is in an idle state, the data transmission is performed in the unlicensed carrier, which solves the lack of correlation in the related art. The problem of the method of data transmission on an unlicensed carrier, thereby achieving the effect of implementing data transmission on an unlicensed carrier.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a data transmission method according to an embodiment of the present invention;

2 is a block diagram showing the structure of a data transmission device according to an embodiment of the present invention;

3 is a schematic diagram of an LBT mechanism of a frame-based device FBE according to an embodiment of the present invention;

4 is a schematic diagram of an LBT mechanism of a load-based device LBE according to an embodiment of the present invention;

FIG. 5 is a first schematic diagram of a data transmission structure according to an embodiment of the present invention; FIG.

6 is a first schematic diagram of a signal transmitted in a data transmission time zone according to an embodiment of the present invention;

7 is a second schematic diagram of a signal transmitted in a data transmission time zone according to an embodiment of the present invention;

FIG. 8 is a third schematic diagram of a signal transmitted in a data transmission time zone according to an embodiment of the present invention; FIG.

9 is a schematic diagram 4 of a data transmission time zone transmission signal according to an embodiment of the present invention;

10 is a schematic diagram 5 of a data transmission time zone transmission signal according to an embodiment of the present invention;

11 is a second schematic diagram of a data transmission structure according to an embodiment of the present invention;

FIG. 12 is a third schematic diagram of a data transmission structure according to an embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of a configuration of a listening subframe according to an embodiment of the present invention; FIG.

FIG. 14 is a fourth schematic diagram of a data transmission structure according to an embodiment of the present invention; FIG.

FIG. 15 is a first schematic diagram of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention; FIG.

16 is a second schematic diagram of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention;

17 is a third schematic diagram of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention;

FIG. 18 is a fourth schematic diagram of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention; FIG.

FIG. 19 is a schematic diagram 5 of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention; FIG.

20 is a schematic diagram 6 of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention;

21 is a schematic diagram 7 of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention;

FIG. 22 is a schematic diagram 8 of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention; FIG.

23 is a schematic diagram 5 of a data transmission structure according to an embodiment of the present invention;

24 is a schematic diagram 6 of a data transmission structure according to an embodiment of the present invention;

25 is a schematic diagram 7 of a data transmission structure according to an embodiment of the present invention;

26 is a schematic diagram VIII of a data transmission structure according to an embodiment of the present invention;

FIG. 27 is a schematic diagram IX of a data transmission structure according to an embodiment of the present invention; FIG.

28 is a first schematic diagram of synchronization signal transmission on an LAA unlicensed carrier according to an embodiment of the present invention;

29 is a second schematic diagram of synchronization signal transmission on an LAA unlicensed carrier according to an embodiment of the present invention;

30 is a third schematic diagram of synchronization signal transmission on an LAA unlicensed carrier according to an embodiment of the present invention;

31 is a fourth schematic diagram of synchronization signal transmission on an LAA unlicensed carrier according to an embodiment of the present invention;

32 is a first schematic diagram of a position of a synchronization signal in a subframe when a synchronization signal is transmitted on an LAA unlicensed carrier according to an embodiment of the present invention;

33 is a second schematic diagram of a position of a synchronization signal in a subframe when a synchronization signal is transmitted on an LAA unlicensed carrier according to an embodiment of the present invention;

FIG. 34 is a third schematic diagram of a position of a synchronization signal in a subframe when a synchronization signal is transmitted on an LAA unlicensed carrier according to an embodiment of the present invention; FIG.

FIG. 35 is a first schematic diagram of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention; FIG.

FIG. 36 is a diagram showing a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Schematic 2;

37 is a third schematic diagram of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

FIG. 38 is a schematic diagram 4 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention; FIG.

39 is a schematic diagram 5 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

40 is a schematic diagram 6 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

FIG. 41 is a schematic diagram VII of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention; FIG.

42 is a schematic diagram VIII of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

43 is a schematic diagram IX of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

44 is a schematic diagram 10 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

45 is a schematic diagram 11 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention;

FIG. 46 is a schematic diagram 12 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention; FIG.

Figure 47 is a schematic diagram 10 of a data transmission structure in accordance with an embodiment of the present invention.

detailed description

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

A data transmission method is provided in this embodiment. FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, detecting whether the unlicensed carrier is in an idle state;

Step S104: Perform data transmission in the unlicensed carrier if the detection result is that the unlicensed carrier is in an idle state.

Through the foregoing steps, detecting whether the unlicensed carrier is in an idle state, and performing data transmission on the unlicensed carrier in a case where the detection result is that the unlicensed carrier is in an idle state, solving the lack of related non-existence in the related art. The problem of the method of performing data transmission on the authorized carrier, thereby achieving the effect of realizing data transmission on the unlicensed carrier.

There are a plurality of methods for detecting whether an unlicensed carrier is in an idle state. In an optional embodiment, whether an unlicensed carrier is in an idle state can be detected by using an idle time zone detection of a listening subframe in a transmission frame. Whether the unlicensed carrier is in an idle state, where the transmission frame includes a listening subframe and a transmission subframe, and the number of the listening subframe and the transmission subframe is one or more, and the listening subframe includes one of the following : idle time area; idle time area and data transmission area, the transmission subframe includes one of the following: a data transmission area; a data transmission area and an idle time area.

The performing data transmission in the unlicensed carrier includes: performing data transmission in the unlicensed carrier by using the data transmission area of the foregoing listening subframe and the foregoing transmission subframe. That is, in this embodiment, the transmission frame is used to check whether the unlicensed carrier is in an idle state, and the transmission frame is used to implement data transmission, thereby achieving the effect of data transmission on the unlicensed carrier.

In a preferred embodiment, the length of the transmission frame is fixed or configured according to a predetermined rule, wherein configuring the transmission frame according to a predetermined rule includes at least one of: configuring a length of the transmission frame according to a high-level configuration parameter; The length of the transmission frame is configured in accordance with national or regional regulations regarding the regulation of unlicensed carriers. Moreover, when the length of the transmission frame is configured according to the above high-level configuration parameter, the length of the transmission frame may be constant during the configuration period of the high-level configuration parameter.

The location of the foregoing listening subframe in the transmission frame is fixed or configured.

In a preferred embodiment, when the location of the interception subframe in the transmission frame is fixed, the interception subframe is located on a first predetermined number of subframes at the front end of the transmission frame or a second reservation at the end of the transmission frame. On a number of subframes, wherein the first predetermined number and the second predetermined number are both fixed or configurable.

In a preferred embodiment, detecting whether the unlicensed carrier is in an idle state comprises: detecting whether the unlicensed carrier is in an idle state on the plurality of listening subframes in sequence, and detecting the non-authorization on one of the listening subframes. When the carrier is in the idle state, all the listening subframes and all the transmitted subframes after the listening subframe are used for data transmission.

In a preferred embodiment, the length of the idle time region of the listening subframe is determined according to one of the following conditions: the length of the listening subframe idle time region is a fixed length; the length of the idle time region of the listening subframe is Determined according to a predetermined parameter of the transmission frame; the length of the idle time region of the listening subframe is according to the front of the listening subframe Determining the data transmission condition of the three predetermined number of subframes; the length of the idle time region of the listening subframe is a time required to detect whether the unlicensed carrier is in an idle state; wherein, when the transmission frame includes multiple listening subframes The idle time zones in multiple listening subframes may be the same or different.

Wherein, when the length of the idle time region of the listening subframe is the time required to detect whether the unlicensed carrier is in an idle state, the length of the idle time region of the transmission subframe is determined according to one of the following conditions: the idle time of the transmission subframe The length of the area is a fixed length; the length of the idle time area of the transmission subframe is determined according to predetermined parameters of the transmission frame.

The predetermined parameter of the foregoing transmission frame may include: a length of a time zone in the transmission frame for performing data transmission.

In a preferred embodiment, detecting whether the unlicensed carrier is in an idle state by using the idle time region in the listening subframe includes: when the length of the idle time region in the listening subframe is fixed or is a reservation according to the transmission frame When the parameter is determined, detecting whether the unlicensed carrier is in an idle state at the end of the idle time region of the listening subframe, wherein after determining that the unlicensed carrier is in an idle state, performing on the data transmission time region of the listening subframe data transmission.

The foregoing data may include at least one of the following: an authorized carrier assisted access LAA-specific signal, an LAA-specific channel, and service data, where the LAA-specific signal includes at least one of: a signal used to indicate channel occupancy, A signal for achieving synchronization, a reference signal for channel measurement, the LAA-specific channel includes: a channel for indicating channel occupancy and/or a channel for carrying system messages.

In a preferred embodiment, performing data transmission on the data transmission time region of the listening subframe includes at least one of: in the data transmission time region of the listening subframe according to the length of the data transmission time region of the listening subframe Transmitting at least one of the following data: LAA proprietary signal, LAA proprietary channel, traffic data; transmitting LAA-specific signals and/or LAA-specific channels on the data transmission time region of the listening subframe.

In a preferred implementation, performing data transmission on the data transmission time region of the listening subframe according to the length of the data transmission time region of the listening subframe includes: when the length of the data transmission time region of the listening subframe is longer than LAA When the proprietary signal and/or the LAA-specific channel occupy a fourth predetermined number of orthogonal frequency division multiplexed OFDM symbols, the LAA-specific signal and/or LAA are transmitted over the data transmission time region of the listening subframe. The proprietary channel also transmits the service data; otherwise, the LAA-specific signal and/or the LAA-specific channel is transmitted on the data transmission time zone of the listening subframe, or the service data is transmitted.

In a preferred embodiment, determining the number of the listening subframes and the length of time for data transmission in the listening subframe according to a result of detection of whether the unlicensed carrier is in an idle state, and/ Or, determining the number of the transmission subframes according to predetermined configuration parameters.

In a preferred embodiment, when there is a service transmission requirement, the unlicensed carrier at the beginning of the subframe is Whether the detection is in the idle state, the subframe is a listening subframe. If the detection result of whether the unlicensed carrier is in the idle state in the current listening subframe does not satisfy the preset condition, the non-progress continues in the next subframe. The authorized carrier performs detection, and the next subframe is also a listening subframe until the above preset condition is satisfied.

The detecting, by the listening subframe, whether the unlicensed carrier is in an idle state may include at least one of: at least a fifth predetermined number of OFDM symbols in the end of the listening subframe is unavailable for detecting whether the unlicensed carrier is idle. In the state, the remaining OFDM symbols except the fifth predetermined number of OFDM symbols are used to detect whether the unlicensed carrier is in an idle state, and jump to the listening subframe when the detection result does not satisfy the foregoing preset condition. The unlicensed carrier is detected in the next listening subframe, wherein the length of the fifth predetermined number of OFDM symbols is at least the length of the LAA-specific signal and/or the LAA-specific channel; when the listener All OFDM symbols of the frame can be used to detect whether the unlicensed carrier is in an idle state when detecting whether the unlicensed carrier is in an idle state.

When at least a fifth predetermined number of OFDM symbols at the end of the listening subframe are unavailable for detecting whether the unlicensed carrier is in an idle state, when the completion time of the unlicensed carrier detection is completed to the end time of the listening subframe The data transmission on the time zone includes at least one of: performing data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe, wherein the data may include at least one of the following: authorized carrier assistance Access LAA proprietary signals, LAA proprietary channels, service data; transmit LAA proprietary signals and/or LAA proprietary channels from the completion time to the end of the listening subframe.

The data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe includes at least one of the following: a length ratio of the OFDM symbol included in the completion time to the end time of the listening subframe is a LAA-specific signal. And/or when the length of the LAA-specific channel is larger than the sixth predetermined number of OFDM symbols, the LAA-specific signal and/or the LAA-specific channel are transmitted on the included OFDM symbol, and the service data is also transmitted, in the listening subframe. After the first subframe is transmitted, the service data is transmitted; when the completion time to the end of the listening subframe, the length of the OFDM symbol included is longer than the LAA-specific signal and/or the length occupied by the LAA-specific channel, and is more specific than the LAA. The length of the signal and/or LAA-specific channel occupancy is less than the sum of the sixth predetermined number of OFDM symbols, and the LAA-specific signal and/or the LAA-specific channel are transmitted on the included OFDM symbol after the subframe is intercepted. Transmit business data on the first subframe.

When all the OFDM symbols of the listening subframe can be used to detect whether the unlicensed carrier is in an idle state, after detecting that the unlicensed carrier is in an idle state, at least one of the following may be included: according to the unlicensed carrier. The data transmission is performed in the time zone from the completion time of the detection completion to the end time of the detection subframe, wherein the time zone from the completion time to the end time of the detection subframe includes a data transmission time zone of the interception subframe, and the foregoing data may include At least one of: granting carrier-assisted access to the LAA-specific signal, LAA-specific channel, service data; transmitting a predetermined portion of the LAA-specific signal and/or on the OFDM symbol included in the data transmission time region of the listening subframe LAA proprietary channel, transmitting the complete LAA in the first subframe after listening to the subframe There are signal and / or LAA proprietary channels, after which the business data is transmitted.

When performing data transmission, at least one of the following may be included: the length of the OFDM symbol included in the data transmission time zone of the listening subframe is greater than the length occupied by the LAA proprietary signal and/or the LAA proprietary channel by a sixth predetermined number. OFDM symbol, transmitting LAA-specific signals and/or LAA-specific channels on the included OFDM symbols, and also transmitting service data, transmitting service data on the first subframe after the interception subframe; when listening The data transmission time zone of the subframe includes a length of the OFDM symbol that is larger than the length occupied by the LAA-specific signal and/or the LAA-specific channel and is longer than the length of the LAA-specific signal and/or channel and the sixth predetermined number of OFDM symbols. And hours, transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol, transmitting the service data on the first subframe after the subframe is intercepted; when listening to the data transmission time region of the subframe When the number of OFDM symbols included is less than the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel, a predetermined portion of the LAA-specific signal and/or the LAA-specific channel are transmitted on the included OFDM symbol, After listening to the subframe The first sub-frame transmits the complete LAA-specific signal and/or the LAA-specific channel, after which the service data is transmitted.

When the number of OFDM symbols included in the data transmission area of the listening subframe is greater than or equal to the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel, the LAA is specifically used in the listening subframe. A complete LAA-specific signal and/or a LAA-specific channel is transmitted in an OFDM symbol having the same number of OFDM symbols occupied by the signal and/or LAA-specific channel, and the service data or the preset portion is transmitted in the remaining OFDM symbols. LAA proprietary signal and / or LAA proprietary channel.

When the data transmission region of the listening subframe includes a non-integer multiple of the OFDM symbol, the time region of the non-integer multiple OFDM symbol is used for partial repetition of the first complete OFDM symbol after the transmission completion time.

In a preferred embodiment, when the transmitted data includes the synchronization signal of the Long Term Evolution (LTE) system, the transmission of the data in the unlicensed carrier by using the interception subframe and the transmission subframe includes at least one of the following: The synchronization signal of the LTE system is transmitted on the first transmission subframe after the carrier is detected; the synchronization signal of the LTE system is transmitted on the transmission subframe aligned with the subframe in which the carrier transmission synchronization channel is located; the data of the subframe is monitored The synchronization signal of the LTE system is transmitted on the transmission area.

Wherein, in the case that the synchronization signal of the LTE system is transmitted on the first transmission subframe after the detection of the unlicensed carrier is completed, when the number of transmission subframes exceeds the seventh predetermined number of subframes, the first one is The transmission subframe transmits a synchronization signal of the LTE system on an eighth predetermined number of subframes per interval.

In a preferred embodiment, the above transmission subframe is used for downlink data transmission and/or uplink data transmission.

In a preferred embodiment, when the transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, where the special subframe includes at least one of: a downlink pilot slot, and a downlink Line conversion guard interval, uplink pilot time slot, idle time area.

When the foregoing transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, where the interception subframe may further include at least one of the following: a downlink pilot slot, and an uplink and downlink conversion protection. Interval, uplink pilot time slot, idle time zone, data transmission area.

The sum of the duration of the listening sub-frame and the special sub-frame may be a preset preset value.

The sequence of the foregoing transmission frame may include one of the following: a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot time slot and an uplink and downlink conversion protection interval. The listening subframe includes an idle time zone, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listener a frame, where the special subframe includes a downlink pilot time slot and an uplink and downlink transition protection interval, where the interception subframe includes an uplink pilot time slot and an idle time zone, and the duration of the special subframe and the listening subframe And a first preset time value; a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot time slot, an uplink and downlink transition protection interval, and an uplink pilot The interception subframe includes an idle time area, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a PDCCH Listen to the sub-frame, where The special subframe includes a downlink pilot time slot, an uplink and downlink transition protection interval, and an uplink pilot time slot, where the listening subframe includes a data transmission area and an idle time area, and the special subframe and the duration of the listening subframe The sum is a second preset time value; a listening sub-frame, a downlink transmission sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time area and a downlink pilot time slot, the special subframe The uplink and downlink conversion protection time, the sum of the duration of the special subframe and the listening subframe is a first preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, where The listening subframe includes an idle time zone and a downlink pilot time slot, where the special subframe includes an uplink and downlink switching protection time and an uplink pilot time slot, and the sum of the duration of the special subframe and the listening subframe is a first preset time value; a listening sub-frame, a downlink transmission sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an uplink pilot time slot, an idle time zone, and a downlink pilot time slot. The special subframe includes a line conversion protection time, where the sum of the duration of the special subframe and the duration of the listening subframe is a first preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, where The listening subframe includes an idle time zone and a data transmission area, where the special subframe includes a downlink pilot time slot, an uplink and downlink transition protection time, and an uplink pilot time slot, and the duration of the special subframe and the listening subframe And a second preset time value; a listening subframe, an uplink transmission subframe, a special subframe, and a downlink transmission subframe, where the intercept subframe includes a downlink pilot slot, an idle time region, and an uplink pilot The slot, the special time slot includes the uplink and downlink conversion protection time, and the sum of the duration of the special subframe and the listening subframe is a first preset time value; the listening subframe, the uplink transmission subframe, the special subframe, and the downlink Transmitting a subframe, where the listening subframe includes an idle time zone and an uplink pilot time slot, where the special time slot includes an uplink and downlink transition protection time and a downlink pilot time slot, and the special subframe and the duration of the interception subframe The sum of time is the first preset a time value; a listening sub-frame, an uplink transmission sub-frame, a special sub-frame, and a downlink transmission sub-frame, where the listening sub-frame includes an idle time area and a data transmission area, and the special time slot includes an uplink pilot time slot, uplink and downlink Converting the guard time and the downlink pilot time slot, and the sum of the durations of the special subframe and the listening subframe is a second preset time value.

In a preferred embodiment, when the foregoing transmission subframe is used for uplink and downlink data transmission, the subframe for performing uplink data transmission and the subframe for performing downlink data transmission are determined by at least one of the following manners: Semi-static high-level signaling determination; through dynamic signaling indication; determined by scheduling.

In the embodiment, a data transmission device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a block diagram showing the structure of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes a detection module 22 and a transmission module 24. The apparatus will be described below.

The detecting module 22 is configured to detect whether the unlicensed carrier is in an idle state; the transmitting module 24 is connected to the detecting module 22, and is configured to perform data in the unlicensed carrier if the detection result is that the unlicensed carrier is in an idle state. Transmission.

In the embodiment of the present invention, a data transmission method for an unlicensed carrier of a LAA is further provided. The method includes: detecting an available condition of an unlicensed carrier on a listening subframe, and performing data transmission on the transmission subframe.

Optionally, the plurality of listening sub-frames and the plurality of transmission sub-frames form a transmission frame, and the listening sub-frame and the transmission sub-frame have the same length of time.

Optionally, the length of the above transmission frame is fixed or configurable.

Optionally, when the length of the foregoing transmission frame is configurable, including but not limited to the following configuration manners:

Configuration method one:

Determining the length of the transmission frame according to the high-level configuration parameters;

Configuration method 2:

The length of the transmission frame is determined in accordance with national or regional regulations regarding the regulation of unlicensed carriers.

Optionally, when the transmission frame has a relatively fixed frame structure, the transmission frame may include one or more listening subframes, and the location of the listening subframe in the transmission frame may be fixed or configured. The listening subframe may be located in the first P subframes of the transmission frame or the last Q subframes of the transmission frame, where P and Q are integers greater than or equal to 1.

Optionally, when the transmission frame includes multiple listening subframes, the base station may sequentially perform detection of whether the unlicensed carrier is in an idle state on multiple listening subframes, when detecting on one of the listening subframes. When the unlicensed carrier is in the idle state, all the listening sub-frames and all the transmitted sub-frames after the listening sub-frame are used for data transmission.

Optionally, the listening subframe may include an idle time area and a data transmission time area, and the interception A subframe can also contain only an idle time zone.

Optionally, the transmission subframe may only include a data transmission area, and may also include a data transmission area and an idle time area.

Optionally, the length of the idle time zone in the listening subframe is fixed; or determined according to the relevant parameters of the configured transmission frame; or, according to the data transmission situation of the previous X subframes, where X is greater than Or an integer equal to 1; or, equal to the detection time required to perform an unlicensed carrier in an idle state.

Optionally, when the length of the idle time zone of the listening subframe is equal to the detection time required for the unlicensed carrier to be in an idle state, the transmission subframe includes a data transmission area and an idle time area, where the idle time of the transmission subframe The length of the area is determined according to one of the following conditions: the length of the idle time area of the transmission subframe is a fixed length; the length of the idle time area of the transmission subframe is determined according to a predetermined parameter of the transmission frame.

Optionally, when the length of the idle time zone in the listening subframe is determined according to the related parameter of the configured transmission frame, the related parameter of the configured transmission frame includes a size of a time zone in the transmission frame that allows data transmission, and the idle The length of the time zone may be at least 5% of the time zone in the transmission frame that allows data transmission.

Optionally, when the length of the idle time zone in the listening subframe is determined according to the data transmission condition of the previous X subframes, the length of the idle time zone in the listening subframe is greater than or equal to the length of the channel availability detection by the base station.

Optionally, the base station does not send any signal in the idle time region in the listening subframe, and performs channel availability detection at the end of the idle time region. When detecting that the channel is available, the base station is listening to the data transmission of the subframe. Data transmission is performed on the time zone and the transmission subframe, wherein the data transmission may be uplink data transmission or downlink data transmission, and may also be uplink and downlink data transmission; otherwise, the base station is on the listening subframe of the next transmission frame. Perform channel availability detection.

Optionally, the data transmission time zone of the listening subframe is used to send at least one of the following data: an LAA proprietary signal, a LAA proprietary channel, and service data.

Optionally, the LAA-specific signals include, but are not limited to, a signal for indicating channel occupancy, a signal for implementing synchronization, and a reference signal for channel measurement; the LAA proprietary channel includes but is not limited to: for carrying A channel for system information, a channel for indicating channel occupancy, and a channel for achieving synchronization.

Optionally, the LAA proprietary signal includes but is not limited to one of the following:

a ZC (Zadoff-Chu) sequence of equally spaced resources occupied by a sounding reference signal (SRS);

a ZC sequence that continuously occupies resources, such as a primary synchronization sequence of an LTE system;

Equally spaced pseudo-random sequences, such as the Common Reference Signal (CRS) of the LTE system, Channel State Information Reference Signal (CSI-RS);

Optionally, the LAA proprietary channel may include, but is not limited to, one of the following:

Broadcast channel of the LTE system;

Physical downlink shared channel;

Physical uplink shared channel.

Optionally, the signal/channel transmitted by the data transmission time zone of the listening subframe is determined according to the duration of the data transmission time zone of the listening subframe, for example, assuming LAA proprietary signal and/or LAA proprietary channel occupation N symbols, when the duration of the data transmission time zone of the listening subframe is greater than or equal to (N+M) symbols, the data transmission time zone of the listening subframe is used to transmit LAA proprietary signals and/or LAA proprietary The channel is also used to transmit service data. Otherwise, the data transmission time area of the listening subframe is used to transmit the LAA-specific signal and/or the LAA-specific channel, or only the service data, where N, M is greater than Or an integer equal to 1.

Optionally, when the data transmission time zone of the listening subframe is used to send the LAA-specific signal and/or the LAA-specific channel, and also send the service data, the LAA-specific signal and/or the LAA-specific channel may be sent first. And then send the service data; may also send the service data first, then send the LAA proprietary signal and / or LAA proprietary channel, preferably, send the LAA proprietary signal and / or LAA on the last N symbols of the listening subframe Proprietary channel.

When the above transmission frame does not have a fixed structure, the transmission frame may include one or more listening subframes and one or more transmission subframes;

Optionally, the number of the listening subframes depends on a channel availability detection result;

Optionally, the number of the transmission subframes is determined by configuration parameters;

Optionally, when there is a data transmission requirement, the base station performs channel availability detection at the beginning of the subframe, where the subframe is a listening subframe; if the current subframe does not satisfy the channel availability detection requirement, the base station is in the next subframe. Continue channel availability detection until the requirements are met.

Optionally, when the interception subframe has at least N OFDM symbols located at the end of the subframe not used for channel availability detection, when detecting that the first N OFDM symbols at the end of the subframe do not satisfy the channel availability detection requirement, the base station Skip N OFDM symbols to the next subframe to continue channel availability detection. Where N is the number of symbols occupied by the LAA proprietary signal and/or the LAA proprietary channel.

Optionally, after the base station completes the channel availability detection, the base station determines, according to the integer multiple of the OFDM symbol number K (K is greater than or equal to N) included in the current time to the end time of the listening subframe, the transmitted LAA proprietary signal and/or LAA proprietary channel, including:

When K is greater than or equal to (N+M) symbols, the base station transmits LAA-specific signals and/or LAA-specific channels on K symbols, and is also used to transmit service data. Otherwise, the base station transmits LAA on K symbols. The proprietary signal and/or the LAA proprietary channel and some or all of it are repeated, and then the service data transmission begins in the next subframe; where N, M is an integer greater than or equal to one.

Or, the remaining time in the listening subframe is all used to send the LAA proprietary signal and/or the LAA proprietary channel;

Or, the remaining ones in the listening subframe are used to transmit the service data.

Optionally, when the remaining time in the listening subframe includes a non-integer multiple of the OFDM symbol, a time region of the non-integer multiple OFDM symbol is used to send a partial repetition of the first OFDM symbol after the completion time, where Equivalent to extending the cyclic prefix of the first OFDM symbol.

Optionally, all the symbols of the listening subframe can be used for channel availability detection. After the base station completes the channel availability detection, the base station selects an integer multiple of the number of OFDM symbols K according to the current time to the end time of the listening subframe. Decide on the signal to be sent and/or the LAA proprietary channel, including:

When K is less than N, the base station transmits a partial LAA-specific signal and/or a LAA-specific channel on K symbols, and transmits LAA-specific signals at the beginning of the first transmission subframe after the subframe is intercepted. And/or LAA-specific channel, and then start service data transmission; for a time length of a non-integer multiple OFDM symbol, for transmitting a partial repetition of the first OFDM symbol after the completion time;

When K is greater than or equal to N, the base station transmits the LAA-specific signal and/or the LAA-specific channel and some or all of the repetitions on the K symbols, and then starts the service data transmission in the first transmission subframe after the interception subframe. For a time length of a non-integer multiple OFDM symbol, for transmitting a partial repetition of the first OFDM symbol after the completion time.

When K is greater than or equal to N, the last N symbols of the listening subframe are used to transmit the complete LAA-specific signal and/or the LAA-specific channel.

Optionally, all symbols of the listening subframe can be used for channel availability detection. After the base station completes channel availability detection, the base station sends complete and/or partial LAA-specific signals in the remaining time of the listening subframe. And/or the LAA-specific channel, which transmits the LAA-specific signal and/or the LAA-specific channel at the beginning of the first transmission subframe after the interception of the subframe, and then starts the traffic data transmission.

Optionally, when the transmission frame needs to send the synchronization signal of the LTE system, the base station sends the synchronization signal of the LTE system on the first transmission subframe after detecting that the channel is available; or the base station sends the synchronization signal to the authorized carrier. The synchronization signal of the LTE system is transmitted on the frame-aligned transmission subframe; or the base station transmits the synchronization signal of the LTE system on the data transmission time region in the interception subframe.

Optionally, the base station sends a synchronization signal of the LTE system on the first transmission subframe after detecting that the channel is available. If the channel transmission time exceeds Y subframes, the base station transmits a synchronization signal on a subframe of Z subframes spaced from the first transmission subframe, where Y and Z are integers greater than or equal to 1.

Optionally, the transmission subframe may be used for downlink data transmission only, or for uplink data transmission, and may also be used for uplink and downlink data transmission.

Wherein, when the transmission subframe is used for uplink data and downlink data transmission, the transmission frame may include a special subframe.

The special subframe may include at least one downlink pilot time slot and one uplink and downlink transition protection interval, and may also include one uplink pilot time slot, and may also include an idle time zone.

Moreover, the foregoing listening subframe may further include at least one of the following: a downlink pilot time slot, an uplink and downlink transition protection interval, an uplink pilot time slot, an idle time area, and a data transmission area.

Optionally, the sequence of the foregoing transmission frame may include one of the following: a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, and uplink and downlink conversion protection. The interval of the listening subframe includes an idle time zone, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; the downlink transmission subframe, the special subframe, the uplink transmission subframe, and the PDCCH Listening to a subframe, where the special subframe includes a downlink pilot time slot and an uplink and downlink transition protection interval, where the interception subframe includes an uplink pilot time slot and an idle time region, and the special subframe and the duration of the interception subframe The sum of the times is a first preset time value; a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and an uplink guide. a frequency slot, the listening subframe includes an idle time region, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; the downlink transmission subframe, the special subframe, and the uplink transmission subframe Listening to sub-frames The special subframe includes a downlink pilot time slot, an uplink and downlink transition protection interval, and an uplink pilot time slot, where the listening subframe includes a data transmission area and an idle time area, and the special subframe and the duration of the listening subframe The sum is a second preset time value; a listening sub-frame, a downlink transmission sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time area and a downlink pilot time slot, the special sub- The frame includes an uplink and downlink conversion protection time, and the sum of the durations of the special subframe and the listening subframe is a first preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, The listening subframe includes an idle time zone and a downlink pilot time slot, where the special subframe includes an uplink and downlink transition protection time and an uplink pilot time slot, and the sum of the duration of the special subframe and the interception subframe. a first preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, where the intercept subframe includes an uplink pilot slot, an idle time region, and a downlink pilot slot. , the special subframe includes a downlink conversion protection time, where the sum of the duration of the special subframe and the duration of the listening subframe is a first preset time value; a listening subframe, a downlink transmission subframe, a special subframe, and an uplink transmission subframe, where The listening subframe includes an idle time zone and a data transmission zone, and the special subframe includes a downlink pilot time slot, an uplink and downlink conversion protection time, and an uplink. a pilot time slot, where the sum of the durations of the special subframe and the listening subframe is a second preset time value; a listening subframe, an uplink transmission subframe, a special subframe, and a downlink transmission subframe, where The listening subframe includes a downlink pilot time slot, an idle time zone, and an uplink pilot time slot. The special time slot includes an uplink and downlink transition protection time, and the sum of the duration of the special subframe and the listening subframe is the first pre- The time value; the listening sub-frame, the uplink transmission sub-frame, the special sub-frame, and the downlink transmission sub-frame, wherein the listening sub-frame includes an idle time area and an uplink pilot time slot, and the special time slot includes an uplink and downlink conversion protection time. And a downlink pilot time slot, where the sum of the durations of the special subframe and the listening subframe is a first preset time value; a listening subframe, an uplink transmission subframe, a special subframe, and a downlink transmission subframe, where The listening subframe includes an idle time zone and a data transmission zone, and the special time slot includes an uplink pilot time slot, an uplink and downlink transition protection time, and a downlink pilot time slot, and the special subframe and the duration of the interception subframe The sum is the second preset time value.

Optionally, when the transmission subframe is used for uplink and downlink transmission, the uplink and downlink ratio of the existing LTE TDD system is supported, or a new uplink and downlink ratio is supported.

Optionally, when the transmission subframe is used for uplink and downlink transmission, the subframe for uplink transmission and the subframe for downlink transmission are determined by one of the following methods:

method one:

Determined by semi-static high-level signaling;

Method 2:

Through dynamic signaling instructions;

Method three:

Determined by scheduling.

The present invention will be described below in conjunction with specific embodiments:

Example 1:

In countries and regions where there is a regulatory requirement for the use of unlicensed carriers, the channel availability detection (Clear Channel Assessment, CCA for short) must be performed before the unlicensed carrier is used. When the detection result is that the unlicensed carrier is idle, The unlicensed carrier can be used. If the detection result is that the unlicensed carrier is busy, then the interception is continued, or the next transmission frame is intercepted (the above process may also be referred to as LBT: listen before talk).

The following is an example of Europe that has regulatory requirements for the use of unlicensed spectrum. It briefly describes the two LBT behaviors supported by European countries. One is for Frame-based Equipment (FBE), and the other is Frame-based Equipment (FBE). One is for load-based equipment (LBE).

3 is a schematic diagram of an LBT mechanism of a frame-based device FBE according to an embodiment of the present invention. As shown in FIG. 3, for a FBE, there is a fixed transmission frame structure, a channel occupation time and an idle period constitute a fixed frame period, and the device is idle. During the period of CCA detection, when the channel is detected to be idle, data transmission can be performed immediately; otherwise, CCA detection is performed during the idle period of the next fixed frame period. For FBE in Europe, the channel occupancy time is 1 millisecond to 10 milliseconds, and the idle period is at least 5% of the channel occupancy time. The specific channel occupancy time is configurable. The CCA test lasts for at least 20 us, and the CCA test can be based on energy detection or based on signal detection.

4 is a schematic diagram of an LBT mechanism of a load-based device LBE according to an embodiment of the present invention. As shown in FIG. 4, for LBE, as the name suggests, load-based, when there is a data transmission requirement, the device starts to perform CCA detection, if After the CCA detection, when the channel is found to be idle, the data transmission can be performed immediately, and the maximum time that the data transmission can occupy is (13/32)×q ms, where q={4,5,6...31,32} It is configurable; otherwise, it enters the extended CCA detection period, that is, it needs to perform X times of CCA detection. The value of X is stored in a counter, where the X value is randomly selected from 1 to q, each time CCA detection (each time) The CCA detection time is the same. If the channel is found to be idle, the counter starts to decrement. If the channel is not idle, the counter is not decremented. When the counter is decremented to 0, data transmission can be started. The data transmission time is determined according to requirements, but The maximum cannot exceed (13/32) × q ms.

Example 2

FIG. 5 is a first schematic diagram of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 5, a schematic diagram of a data transmission method for an unlicensed carrier of an LAA is shown. In this diagram, it is assumed that the LBT takes the form of FBE, that is, the transmission frame has a relatively fixed structure, and it is assumed here that the transmission frame has a fixed length, in this example, the transmission frame has a length of 10 ms, which is equivalent to the existing LTE system. The length of a wireless frame.

The transmission frame includes one listening subframe and 9 transmission subframes. It is assumed that the listening subframe and the transmission subframe adopt the subframe parameters of the existing LTE system, including the length of the OFDM symbol, the CP length, the subcarrier spacing, and the subframe. Length, etc. Therefore, it is assumed here that the time domain duration of one subframe is 1 ms.

The listening sub-frame contains a free area and a data transfer area. When the length of the free area is fixed, such as 0.5 ms (corresponding to one time slot of the LTE system), the data transmission area also accounts for 0.5 ms. When the conventional cyclic prefix of the LTE system is used, the data transmission area includes 7 OFDM. symbol. When the length of the free area is 0.5 ms, the transmission frame is 10 ms, the channel occupation time is 9.5 ms, and the time for satisfying the idle area is at least 5% of the channel occupation time.

In this embodiment, the snoop subframe is located on the first subframe of the transmission frame.

The base station performs channel availability detection (CCA detection) at the end of the free area, when the detection result is busy, The base station can detect the channel availability in the listening subframe of the next transmission frame; when the detection result is idle, the base station can use the unlicensed spectrum and start transmitting signals in the data transmission time region of the listening subframe.

For signals transmitted on the data transmission time zone, consider the following:

Only send LAA-specific signals/channels;

Transmitting LAA proprietary signals and/or LAA proprietary channels while also transmitting service data;

Send business data.

Or the transmitted signal is determined according to the duration of the data transmission time zone of the listening subframe.

The LAA-specific signal/channel includes, but is not limited to, a signal/channel for indicating channel occupancy, a signal/channel for achieving synchronization, a reference signal for channel measurement, and a channel for carrying system information.

It is assumed that the LAA proprietary signal and/or the LAA proprietary channel occupy a total of 3 OFDM symbols, that is, N=3.

It is assumed that in this embodiment, the data transmission time zone includes 7 OFDM symbols, that is, K=7. The LAA proprietary signal and/or LAA proprietary channel occupies 3 OFDM symbols, so the LAA proprietary signal and/or LAA are used when the data transmission time zone is only used to transmit LAA proprietary signals and/or LAA proprietary channels. The proprietary channel is repeatedly transmitted in the data transmission time zone, and specifically has the following two methods:

Mode 1: As shown in FIG. 6, FIG. 6 is a schematic diagram 1 of transmitting a signal in a data transmission time zone according to an embodiment of the present invention. The first three OFDM symbols transmit a complete LAA proprietary signal and/or a LAA proprietary channel, and the last four. OFDM symbols repeatedly transmit LAA-specific signals and/or LAA-specific channels in order from left to right, that is, the first three OFMD symbols in the last four OFDM symbols repeat the complete LAA-specific signal and/or LAA-specific With a channel, the last OFDM symbol of the last four OFDM symbols repeats the LAA-specific signal and/or the first OFDM symbol of the LAA-specific channel;

Mode 2: As shown in FIG. 7, FIG. 7 is a schematic diagram 2 of a data transmission time zone transmission signal according to an embodiment of the present invention. The last three OFDM symbols transmit a complete LAA proprietary signal and/or a LAA proprietary channel, and the first four. OFDM symbols repeatedly transmit LAA-specific signals and/or LAA-specific channels in right-to-left order, that is, the last three OFMD symbols in the first four OFDM symbols repeat the complete LAA-specific signal and/or LAA-specific With a channel, the first OFDM symbol in the first four OFDM symbols repeats the LAA-specific signal and/or the third OFDM symbol of the LAA-specific channel;

When the data transmission time zone is used to transmit the LAA-specific signal and/or the LAA-specific channel and service data, as shown in FIG. 8, FIG. 8 is a schematic diagram 3 of the data transmission time zone transmission signal according to an embodiment of the present invention. The first 3 OFDM symbols of the transmission time zone are used to transmit LAA-specific signals, and the last 4 OFDM symbols are used to transmit service data, or as shown in FIG. 9, FIG. 9 is a data transmission time zone according to an embodiment of the present invention. Schematic diagram 4 of the transmitted signal, the first 4 OFDM symbols of the data transmission time zone are used to transmit service data, and the last 3 OFDM symbols are used to transmit LAA proprietary signals or channels.

When the data transmission time zone is used to transmit data, the data transmission time zone occupies 7 OFDM symbols in this embodiment. Therefore, when 7 OFDM symbols are used to transmit data, reference may be made to the existing LTE TDD system in which the DwPTS is 7 The design of the OFDM symbols is as shown in FIG. 10. FIG. 10 is a schematic diagram 5 of the data transmission time zone transmission signal according to an embodiment of the present invention.

When the signal/channel transmitted in the data transmission time zone of the listening subframe is determined according to the duration of the data transmission time zone of the listening subframe, in this embodiment, since the data transmission time zone occupies 7 OFDM symbols, K=7, while the LAA-specific signal and/or LAA-specific channel occupies 3 OFDM symbols, that is, N=3. Here, it is assumed that M=3, since K>M+N, the data transmission time zone can transmit LAA. Proprietary signal and/or LAA proprietary channel and service data. Specifically, the first 3 OFDM symbols in the data transmission time zone are used to transmit LAA proprietary signals, and the last 4 OFDM symbols are used to transmit service data, or data. The first 4 OFDM symbols of the transmission time zone are used to transmit traffic data, and the last 3 OFDM symbols are used to transmit LAA proprietary signals or channels, as shown in Figures 8 and 9, respectively.

The foregoing embodiment is applicable to a scenario in which the LAA-specific signal and/or the LAA-specific channel must be transmitted. In this embodiment, the listening subframe is located at the beginning of the transmission frame, and the result of the CCA detection after the listening subframe is determined. Whether the current transmission frame can use the unlicensed spectrum.

Example 3

FIG. 11 is a second schematic diagram of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 11, the embodiment is different from Embodiment 2 in that the listening subframe is located in the last subframe of the transmission frame.

The listening subframe includes a data transmission time zone and a free zone, wherein the free zone is located at the end of the transmission frame. The base station performs CCA detection in the idle area. When the detection result is idle, the base station can perform data transmission in the next transmission frame, otherwise the base station should continue the CCA detection in the free area of the next transmission frame.

In the transmission frame structure of the present embodiment, since the data transmission time zone is located in front of the free area, it can only be used to transmit service data, and thus is suitable for a scenario in which no LAA dedicated signal/channel is required to be transmitted, or a LAA dedicated signal/channel fixed. The scene sent on the first subframe of the transmission frame.

Example 4

FIG. 12 is a third schematic diagram of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 12, the embodiment is related to The difference between the embodiment 3 is that the listening sub-frame is first a free area, and then the data transmission time area. After the data transmission area is after the idle area, the base station performs the LCA-specific signal in the data transmission area after performing CCA detection in the free area. Channel and/or traffic data transmission.

This embodiment is also basically the same as Embodiment 2, except that the start and end of the transmission frame are different, and Embodiment 4 can be regarded as that the start position of the transmission frame of Embodiment 2 is shifted forward by one subframe. Therefore, the design of the data transmission structure in Embodiment 2 is equally applicable to Embodiment 4, and will not be described again here.

Example 5

FIG. 13 is a schematic diagram of a configuration of a listening subframe according to an embodiment of the present invention. As shown in FIG. 13, if a subframe 0, 1, 2 is configured as a listening subframe, the base station starts an unlicensed carrier from subframe 0. Whether the detection is in an idle state, if an unlicensed carrier is detected to be in an idle state at the end of the idle area of the listening subframe 0, data transmission may be performed from the data transmission area of the subframe 0, and subframe 1 and subframe 2 are no longer Used as a listening sub-frame and as a transport sub-frame.

If the base station detects that the unlicensed carrier is in the non-idle state at the end of the idle area of the subframe 0, the detection of whether the unlicensed carrier is in the idle state is continued from the end of the idle area of the subframe 1, if the subframe 1 is idle. When the end of the area detects that the unlicensed carrier is in an idle state, data transmission can be performed from the data transmission area of the subframe 1, and the subframe 2 is no longer used as a listening subframe, but is used as a transmission subframe.

If the base station detects that the unlicensed carrier is in the non-idle state at the end of the idle area of the subframe 1, the detection of whether the unlicensed carrier is in the idle state is continued from the end of the idle area of the subframe 2, if the subframe 2 is idle. When the end of the area detects that the unlicensed carrier is in an idle state, data transmission can be performed from the data transmission area of the subframe 2.

If the base station detects that the unlicensed carrier is in the non-idle state at the end of the idle area of the subframe 2, the base station will continue the detection of whether the unlicensed carrier is in the idle state from the free area of the subframe 0 of the next radio frame.

Example 6

FIG. 14 is a schematic diagram 4 of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 14, a schematic diagram of a data transmission method for an unlicensed carrier of an LAA is shown. In the diagram, it is assumed that the LBT is in the form of LBE, and the base station performs CCA detection when there is a data transmission requirement. It is assumed that CCA detection is performed on the subframe #1 of the radio frame n, and when the channel is idle, the base station can immediately perform data. Transmission, here assumes that there are 12 OFDM symbols (i.e., K = 12) and non-integer multiples of OFDM symbols (shaded portions of subframe #1) at the end of the CCA detection end time to the end time of subframe #1.

For the remaining time in the listening sub-frame, the base station may consider transmitting the following signals/channels:

LAA proprietary signal and / or LAA proprietary channel;

LAA proprietary signal and/or LAA proprietary channel, simultaneously transmitting service data;

Business data.

When the signal transmitted in the remaining time in the listening subframe is determined according to the length of the remaining time, in the present embodiment, since the remaining symbol includes 12 OFDM symbols and a non-integer multiple of the OFDM symbol, assuming the LAA proprietary signal and / Or the LAA-specific channel occupies N symbols, and assuming M=3, since K>(N+M), the base station can transmit a signal in the manner shown in FIG. 15 during the remaining time of the listening subframe, FIG. 15 FIG. 1 is a schematic diagram of transmitting a signal in a remaining transmission time in a listening subframe according to an embodiment of the present invention:

The first three OFDM symbols are used to transmit LAA dedicated signals/channels;

The next nine OFDM symbols are used to transmit traffic data.

The portion of the non-integer multiple OFDM symbol is used to transmit a portion of the LAA-specific signal and/or the first OFDM symbol in the LAA-specific channel, which is equivalent to extending the LAA-specific signal and/or the LAA-specific channel. a cyclic prefix of the first OFDM symbol;

Or, according to the method shown in FIG. 16, the signal is transmitted. FIG. 16 is a schematic diagram 2 of the remaining transmission time transmission signal in the interception subframe according to the embodiment of the present invention:

The first 9 OFDM symbols are used to transmit service data;

The next 9 OFDM symbols are used to transmit the LAA dedicated signal/channel.

A portion of the non-integer multiple OFDM symbol is used to transmit a portion of the first OFDM symbol of the traffic data, here equivalent to a cyclic prefix of the first OFDM symbol that extends the traffic data;

When the remaining time in the listening subframe is only used to transmit the LAA-specific signal and/or the LAA-specific channel, since the LAA-specific signal and/or the LAA-specific channel only occupy 3 OFDM symbols, the remaining time An integer multiple of OFDM symbols may repeatedly transmit LAA-specific signals and/or LAA-specific channels, and for portions of non-integer multiples of OFDM symbols, repeatedly transmit a portion of the first complete OFDM symbol of the remaining time, FIG. 17 is according to the present FIG. 3 is a schematic diagram of the remaining transmission time transmission signal in the listening subframe of the embodiment of the present invention. In FIG. 17, a part of the LAA-specific signal and/or the first OFDM symbol in the LAA-specific channel is repeatedly transmitted.

In FIG. 17, since the remaining number of OFDM symbols in the listening subframe is an integer multiple of the number of symbols occupied by the LAA-specific signal and/or the LAA-specific channel, the LAA-specific signal and/or LAA can be completely repeated. Proprietary channel. If the number of remaining OFDM symbols in the listening sub-frame is not a LAA-specific signal and/or a LAA-specific channel occupant When the number of integers is an integer multiple, the repeated transmission of the remaining time of the LAA-specific signal in the listening subframe can be considered as follows:

Mode 1: FIG. 18 is a schematic diagram 4 of a remaining transmission time transmission signal in a listening subframe according to an embodiment of the present invention. As shown in FIG. 18, it is assumed that the number of remaining OFDM symbols in the listening subframe is 11 and a non-integer multiple. OFDM symbols, transmitting the LAA-specific signal and/or the LAA-specific channel in the last N (here N=3) OFDM symbols of the listening subframe, and then repeatedly transmitting the LAA-specific signal and/or every N symbols forward. Or LAA proprietary channel, for the less than N symbols, the second half of the truncated LAA proprietary signal is sent.

Mode 2: FIG. 19 is a schematic diagram 5 of a residual transmission time transmission signal in a listening subframe according to an embodiment of the present invention. As shown in FIG. 19, it is assumed that the number of remaining OFDM symbols in the listening subframe is 11 and a non-integer multiple. OFDM symbols, N (here N=3) OFDM symbols starting at the first integer multiple OFDM symbol of the listening subframe are transmitted LAA-specific signals and/or LAA-specific channels, and then repeated every N symbols backwards The LAA proprietary signal and/or the LAA proprietary channel are sent once, and the first half of the truncated LAA proprietary signal is transmitted for portions that are less than N symbols.

And when the remaining time in the listening subframe is used to transmit data, 12 OFDM symbols are used for data transmission, and a part of the first OFDM symbol of part of the service data of the non-integer multiple OFDM symbol is as shown in FIG. 20, FIG. 20 is a sixth diagram of a transmission signal of a remaining transmission time in a listening subframe according to an embodiment of the present invention.

Example 7

As shown in FIG. 14, in the schematic diagram, it is assumed that the LBT is in the form of LBE, and the base station performs CCA detection when there is a data transmission requirement, and assumes that CCA detection is performed on subframe #2 of the radio frame n+1, and the channel is detected. Busy (non-idle), the base station enters the extended CCA process, and obtains the random number X=5, then the base station detects that the detection results of the five CCAs are all channel idle (the shadowed CCA detection result is the channel busy), and then enters the data transmission. At this stage, it is assumed here that there are 5 OFDM symbols and a non-integer multiple of OFDM symbols (shaded portions of subframe #2) at the end of the CCA detection end time to the end of the radio frame subframe #2.

When the signal transmitted in the remaining time in the listening subframe is determined according to the length of the remaining time, in the present embodiment, since the remaining symbol includes 5 OFDM symbols and a non-integer multiple of the OFDM symbol, it is assumed that M=3, which is not satisfied. K>(N+M), so the base station transmits the LAA-specific signal and/or the LAA-specific channel and its repetition in the remaining symbols of the listening subframe, as shown in FIG. 21, FIG. 21 is a Detection according to an embodiment of the present invention. Schematic diagram of transmitting signals in the remaining transmission time in the sub-frame: Part of the previous non-integer multiple OFDM symbol repeatedly transmits the LAA-specific signal and/or part of the first OFDM symbol in the LAA-specific channel, the first three OFDM symbols The LAA proprietary signal and/or the LAA proprietary channel are transmitted, and the last two symbols repeatedly transmit the LAA proprietary signal and/or the first two symbols of the LAA proprietary channel.

Alternatively, in the manner shown in FIG. 22, FIG. 22 is a schematic diagram 8 of the remaining transmission time transmission signal in the interception subframe according to the embodiment of the present invention:

The LA signal and/or the LAA-specific channel are transmitted in the last N (here N=3) OFDM symbols of the listening subframe, and then the LAA-specific signal and/or LAA-specific are transmitted once every N symbols. The channel, for portions of less than N symbols, transmits the second half of the truncated LAA proprietary signal.

Example 8

FIG. 23 is a schematic diagram 5 of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 23, the figure shows another schematic diagram of a data transmission method of an unlicensed carrier of the LAA. In the diagram, it is assumed that the LBT is in the form of LBE, and the base station performs CCA detection when there is data transmission demand, assuming that CCA detection is performed on subframe #2 of radio frame n, and that the channel is busy, the base station enters the extended CCA process. , get the random number X=9. It is assumed that before the last 3 symbols of subframe #2 are detected (here, N=3), the requirement of extended CCA is still not satisfied. At this time, the counter X=2 has not yet reached X=0. At this time, the base station will skip the subframe. The last 3 OFDM symbols of #2 continue to perform extended CCA detection at the beginning of subframe #3 until counter X is decremented to zero. After X is reduced to 0, the base station can start data transmission. For the transmission of the base station on subframe #3, refer to Embodiment 6, which is not described here.

In this way, after the CCA or extended CCA detection is completed, the complete LAA-specific signal and/or the LAA-specific channel can be sent on the listening subframe, and then the transmission subframe does not need to leave a symbol to transmit the LAA-specific signal. And / or LAA proprietary channel, as long as a normal data sub-frame, no need to consider additional design. This approach is more suitable for scenarios where LAA proprietary signals and/or LAA proprietary channels are required.

Example 9

FIG. 24 is a schematic diagram 6 of a data transmission structure according to an embodiment of the present invention, and FIG. 24 is another schematic diagram showing a data transmission method of an unlicensed carrier of the LAA. In the diagram, it is assumed that the LBT is in the form of LBE, and the base station performs CCA detection when there is data transmission demand, assuming that CCA detection is performed on subframe #2 of radio frame n, and that the channel is busy, the base station enters the extended CCA process. , get the random number X=9. Assuming that all symbols of the listening sub-frame #2 can be used for CCA and extended CCA detection, then after the base station completes the extended CCA detection, only one OFDM symbol remains in the listening frame #2.

After the extended CCA detection is completed, the base station determines the transmitted signal/channel according to the integer multiple OFDM symbol number K included in the current time to the end time of the listening subframe. Specifically:

When K is less than N, the base station transmits a partial LAA-specific signal and/or a LAA-specific channel on K symbols. The N symbols transmit the LAA-specific signal and/or the LAA-specific channel at the beginning of the first transmission subframe after the subframe is intercepted, and then start the traffic data transmission; for the time length of the non-integer multiple OFDM symbol, Sending a partial repetition of the LAA proprietary signal and/or the LAA proprietary channel;

When K is greater than or equal to N, the base station transmits the LAA-specific signal and/or the LAA-specific channel and some or all of the repetitions on the K symbols, and then starts the service data transmission in the first transmission subframe after the interception subframe. For a length of time that is not an integer multiple of OFDM symbols, is used to transmit a partial repetition of the LAA-specific signal and/or the LAA-specific channel.

In FIG. 24, since only one OFDM symbol remains in the listening subframe, that is, the case of K<N, the base station transmits the LAA-specific signal and/or LAA on the remaining one OFDM symbol of the listening subframe. The previous symbol of the proprietary channel, then transmits the LAA-specific signal and/or the LAA-specific channel on the first 3 OFDM symbols of the first subframe after the listening subframe, and then starts the traffic data transmission.

It should be noted that some of the LAA-specific signals and/or LAA-specific channels that are repeatedly transmitted in the listening sub-frame may be the LAA-specific signal and/or the front part of the LAA-specific channel, or may be the LAA. The latter part of the proprietary signal and/or LAA proprietary channel is exemplified in Figure 23 by repeating the LAA proprietary signal and/or the front portion of the LAA proprietary channel. This principle, for all other embodiments of the invention, the portions of the LAA-specific signal and/or LAA-specific channel repetition transmission are equally applicable.

Example 10

25 is a schematic diagram VII of a data transmission structure according to an embodiment of the present invention. FIG. 25 shows another embodiment, which is basically similar to Embodiment 9. The difference lies in the remaining 4 after completing the extended CCA detection according to the extended CCA detection requirement. OFDM symbols, since K>N (4>3), the base station transmits LAA-specific signals and/or LAA-specific channels on the remaining 4 OFDM symbols of the listening sub-frame, in which the LAA-specific signals are also repeated. And/or the first OFDM symbol of the LAA-specific channel, and then start the traffic data transmission in the first transmission subframe after the listening subframe.

Or, as shown in FIG. 26, FIG. 26 is a schematic diagram of a data transmission structure according to an embodiment of the present invention. The last N symbols of the subframe subframe are sent with LAA-specific signals and/or LAA-specific channels, and the previous symbol is repeated. The third symbol of the LAA proprietary signal and/or LAA proprietary channel.

Example 11

FIG. 27 is a schematic diagram 9 of a data transmission structure according to an embodiment of the present invention, and FIG. 27 is another schematic diagram showing a data transmission method of an unlicensed carrier of the LAA. In this diagram, it is assumed that the LBT is in the form of an LBE. The base station performs CCA detection when there is a data transmission requirement, and assumes that CCA detection is performed on subframe #2 of the radio frame n, and when the channel is busy, the base station enters the extended CCA process and acquires the random number X=6. Assuming that all symbols of the listening sub-frame #2 can be used for CCA and extended CCA detection, after the base station completes the extended CCA detection, only four OFDM symbols are left in the listening frame #2, and the base station is listening to the subframe. Sending complete and/or partial LAA-specific signals and/or LAA-specific channels for the remaining time, transmitting LAA-specific signals and/or LAA in the first 3 symbols of the first transmitted subframe after the listening sub-frame Proprietary channel before starting service data transmission.

In this embodiment, the complete LAA-specific signal and/or the LAA-specific channel must be transmitted on the first transmission subframe after the interception subframe, and then the extended CCA is completed in the interception subframe. The LAA proprietary signal and/or the LAA proprietary channel are transmitted in whole or in part over the remaining time after detection. For the part of the LAA-specific signal and/or LAA-specific channel repetition transmission, the repetition principle mentioned in Embodiment 9 is also followed, and will not be described here.

Example 12

The synchronization signal is used to achieve frame synchronization, acquire the cell ID, and perform coarse frequency offset calibration. For unlicensed carriers, whether or not it is necessary to transmit a synchronization signal is not currently finalized. In this embodiment, if a synchronization signal needs to be transmitted on an unlicensed carrier, there are the following candidate methods for transmitting the synchronization signal:

(1) The base station transmits a synchronization signal of the LTE system on the first transmission subframe after detecting that the channel is available, as shown in FIG. 28, and FIG. 28 is a schematic diagram of synchronization signal transmission on the LAA unlicensed carrier according to an embodiment of the present invention. One.

(2) The base station transmits the synchronization signal of the LTE system on the transmission subframe aligned with the subframe in which the transmission signal of the authorized carrier transmits the synchronization signal, as shown in FIG. 29, FIG. 29 is a synchronization signal transmission on the LAA unlicensed carrier according to the embodiment of the present invention. Figure 2 of the diagram.

(3) The base station transmits the synchronization signal of the LTE system on the data transmission time zone in the listening subframe. As shown in FIG. 30, FIG. 30 is a schematic diagram 3 of the synchronization signal transmission on the LAA unlicensed carrier according to the embodiment of the present invention.

It should be noted that although the schematic diagrams of FIGS. 28-30 show the transmission of the synchronization signal of the FBE-based transmission frame, the same applies to the LBE.

Further, when the synchronization signal is transmitted in the above manner (1), if the channel transmission time exceeds Y subframes, the base station transmits a synchronization signal on a subframe of Z subframes every interval from the first transmission subframe. It is assumed here that Y is 5 and Z is also equal to 5. As shown in FIG. 31, FIG. 31 is a schematic diagram 4 of the synchronization signal transmission on the LAA unlicensed carrier according to the embodiment of the present invention. Since the length of the transmission frame is 10 ms, the channel transmission time is More than 5 subframes are exceeded. Therefore, the base station will transmit a synchronization signal on a subframe that is separated by 5 subframes from the first transmission subframe, that is, the base station will transmit synchronization on subframe 6 (shaded in the figure). signal.

Alternatively, the subframe in which the synchronization signal is transmitted may also transmit a broadcast channel.

When the base station transmits the synchronization signal and the broadcast channel of the LTE system on the first transmission subframe after detecting that the channel is available, the synchronization signal of the LTE system and the position of the broadcast channel in the subframe can be considered as shown in FIG. 32 to FIG. One of the ways shown:

Mode 1: As shown in FIG. 32, FIG. 32 is a first schematic diagram of the position of a synchronization signal in a subframe when a synchronization signal is transmitted on an LAA unlicensed carrier according to an embodiment of the present invention, in the first of the first transmission subframe. The last two symbols of the time slot transmit the primary synchronization signal and the secondary synchronization signal, and the first four symbols of the second time slot transmit the broadcast channel.

Mode 2: As shown in FIG. 33, FIG. 33 is a schematic diagram 2 of the position of the synchronization signal in the subframe when the synchronization signal is transmitted on the LAA unlicensed carrier according to an embodiment of the present invention, in the first of the first transmission subframe. The middle two symbols of the time slot transmit the primary synchronization signal and the secondary synchronization signal, and the first four symbols of the second time slot transmit the broadcast channel, and the middle two symbols, specifically, for the regular cyclic prefix, the middle two symbol fingers The third and fourth symbols in the frame, or the fourth and fifth symbols, for the extended cyclic prefix, the middle two symbols refer to the third and fourth symbols in the subframe;

Mode 3: As shown in FIG. 34, FIG. 34 is a third schematic diagram of the position of the synchronization signal in the subframe when the synchronization signal is transmitted on the LAA unlicensed carrier according to an embodiment of the present invention, in the first of the first transmission subframe. The primary synchronization signal and the secondary synchronization signal are transmitted on the first two symbols of the time slot, and the broadcast channel is transmitted on four consecutive symbols starting from the third symbol.

Optionally, two OFDM symbols of the synchronization signal are sent, and the primary synchronization signal may be sent first, then the secondary synchronization signal may be sent, or the secondary synchronization signal may be sent first, and then the primary synchronization signal is sent.

When the base station transmits the synchronization signal of the LTE system on the transmission subframe aligned with the subframe in which the transmission signal of the authorized carrier transmits the synchronization signal, the position of the synchronization signal of the LTE system in the subframe is the same as that of the LTE system.

Example 13

When the transmission subframes in the transmission frame are used for downlink transmission, for the transmission frame of the FBE, all the transmission subframes in the transmission frame are not necessarily used for data transmission, and when there is no data transmission requirement, the transmission frame is in the transmission frame. The sub-frame can not send anything. However, when there is a need for data transmission, the base station needs to perform CCA detection on the listening subframe in the transmission frame. FIG. 35 is a schematic diagram 1 of a data transmission structure when an LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention, and FIG. 35 shows an example in which a transmission subframe is only used for downlink transmission, in this example, all The transmission subframes are all used for downlink transmission, and the data transmission time region in the listening subframe can also be used for downlink data transmission.

Example 14

When the transmission subframe in the transmission frame is used for uplink transmission and downlink transmission, the transmission frame includes a special subframe, and the special subframe includes at least one of the following: a downlink pilot time slot, an uplink and downlink conversion protection time, and an uplink guide. Frequency slot.

When the transmission subframe in the transmission frame is used for uplink transmission and downlink transmission, the transmission frame further includes a listening subframe, and the listening subframe includes at least one of the following:

Downlink pilot time slot, uplink and downlink guard interval, uplink pilot time slot, idle time area, data transmission area.

The sum of the durations of the listening sub-frame and the special sub-frame is a preset value.

The interception subframe, the special subframe, and the downlink transmission subframe, the location of the uplink transmission subframe in a transmission frame may have various forms, including but not limited to at least one of the following:

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and the intercept subframe includes an idle time region, a special subframe, and a PDCCH. The sum of the durations of the sub-frames is the first preset time value. As shown in FIG. 36, FIG. 36 is a second schematic diagram of the data transmission structure when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. The preset time value is the duration of 1 subframe, that is, 1 ms.

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot and an uplink and downlink transition protection interval, and the intercept subframe includes an uplink pilot slot and an idle time region. The sum of the durations of the special subframe and the listening subframe is a first preset time value, as shown in FIG. 37. FIG. 37 is a data transmission when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Schematic diagram 3, the first preset time value is the duration of one subframe, that is, 1 ms.

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition guard interval, and an uplink pilot slot, and the intercept subframe includes an idle time region. The sum of the durations of the special subframe and the listening subframe is a first preset time value, as shown in FIG. 38, FIG. 38 is a data transmission when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Schematic diagram 4, the first preset time value is the duration of 1 subframe, that is, 1 ms.

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition guard interval, and an uplink pilot slot, and the intercept subframe includes a data transmission region. The sum of the idle time zone, the duration of the special subframe and the listening subframe is a second preset time value, as shown in FIG. 39, FIG. 39 is a LAA unlicensed spectrum used for uplink and downlink transmission according to an embodiment of the present invention. At the time of the data transmission structure diagram 5, the first preset time value is the duration of 2 subframes, that is, 2 ms.

The listening sub-frame, the downlink transmission sub-frame, the special sub-frame, and the uplink transmission sub-frame, wherein the listening sub-frame includes an idle time region and a downlink pilot time slot, and the special subframe includes an uplink and downlink conversion protection time, a special subframe, and Listening subframe The sum of the durations is the first preset time value; as shown in FIG. 40, FIG. 40 is a schematic diagram 6 of the data transmission structure when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. The value is the duration of 1 subframe, which is 1 ms.

The listening sub-frame, the downlink transmission sub-frame, the special sub-frame, and the uplink transmission sub-frame, where the listening sub-frame includes an idle time region and a downlink pilot time slot, where the special subframe includes uplink and downlink conversion protection time and uplink pilot time. The sum of the durations of the slot, the special subframe and the listening subframe is a first preset time value; as shown in FIG. 41, FIG. 41 is the data when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Schematic diagram of the transmission structure. The first preset time value is the duration of one subframe, that is, 2 ms.

The listening sub-frame, the downlink sub-frame, the special sub-frame, and the uplink transmission sub-frame, where the listening sub-frame includes an uplink pilot time slot, an idle time area, and a downlink pilot time slot, and the special subframe includes uplink and downlink conversion protection. The sum of the durations of the time, the special subframe and the listening subframe is the first preset time value; as shown in FIG. 42 , FIG. 42 is the data when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Transmission structure diagram VIII, the first preset time value is the duration of 1 subframe, that is, 1 ms.

The listening sub-frame, the downlink transmission sub-frame, the special sub-frame, and the uplink transmission sub-frame, wherein the listening sub-frame includes an idle time area and a data transmission area, and the special subframe includes a downlink pilot time slot, an uplink and downlink conversion protection time, and The sum of the durations of the uplink pilot time slot, the special subframe and the listening subframe is a second preset time value; as shown in FIG. 43, FIG. 43 is an LAA unlicensed spectrum used for uplink and downlink according to an embodiment of the present invention. Schematic diagram of the data transmission structure during transmission. The first preset time value is the duration of 2 subframes, that is, 2 ms.

The listening sub-frame, the uplink transmission sub-frame, the special sub-frame, and the downlink transmission sub-frame, where the listening sub-frame includes an idle time area and an uplink pilot time slot, where the special time slot includes uplink and downlink conversion protection time and downlink pilot time. The sum of the durations of the slots, the special subframes, and the listening subframes is a first preset time value, as shown in FIG. 44, and FIG. 44 is a diagram showing an LAA unlicensed spectrum used for uplink and downlink transmission according to an embodiment of the present invention. Schematic diagram of the data transmission structure. The first preset time value is the duration of one subframe, that is, 1 ms.

The listening sub-frame, the uplink sub-frame, the special sub-frame, and the downlink transmission sub-frame, wherein the listening sub-frame includes a downlink pilot time slot, an idle time zone, and an uplink pilot time slot, and the special time slot includes uplink and downlink conversion protection. The sum of the durations of the time, the special subframe and the listening subframe is the first preset time value, as shown in FIG. 45, and FIG. 45 is the data when the LAA unlicensed spectrum is used for uplink and downlink transmission according to an embodiment of the present invention. Schematic diagram of the transmission structure 11. The first preset time value is the duration of one subframe, that is, 1 ms.

The listening sub-frame, the uplink transmission sub-frame, the special sub-frame, and the downlink transmission sub-frame, wherein the listening sub-frame includes an idle time area and a data transmission area, and the special time slot includes an uplink pilot time slot, an uplink and downlink conversion protection time, and The downlink pilot time slot, the sum of the durations of the special subframe and the listening subframe is a second preset time value, as shown in FIG. 46, FIG. 46 is an LAA unlicensed spectrum used for uplink and downlink according to an embodiment of the present invention. Schematic diagram of data transmission structure during transmission 12. The first preset time value is the duration of 2 subframes, that is, 2 ms.

When the duration of the special subframe and the listening subframe is 2 subframes, the design of the downlink pilot slot in the special subframe and the design of the uplink pilot slot can reuse the design of the existing LTE TDD system, and listen to the subframe. The design of the foregoing embodiment may be adopted; when the duration of the special subframe and the listening subframe is 1 subframe, the uplink pilot slot in the special subframe or the listening subframe, and the downlink pilot slot The design can reuse the design of the existing LTE TDD system, and can also be redesigned, and the design of the listening sub-frame can refer to the design of the above embodiment.

Example 15

47 is a schematic diagram of a data transmission structure according to an embodiment of the present invention. As shown in FIG. 47, in this embodiment, the detection of whether an unlicensed carrier is in an idle state is performed at the beginning of a transmission frame, and is idle in a listening subframe. The time zone is equal to the time required for the unlicensed carrier to be in the idle state detection. When the unlicensed carrier is in the idle state detection, the data transmission is started immediately. For the data transmission in the listening subframe, the foregoing implementation may be adopted. The method of the example is not repeated here.

In this embodiment, the last transmission subframe of the transmission frame includes a data transmission area and an idle time area, wherein the data transmission area of the data transmission area may refer to the design of the downlink pilot time slot of the LTE TDD system, or Considering the new design, the length of the idle time zone can be fixed; or determined according to the predetermined parameters of the transmission frame, here the idle time zone and the idleness in the listening subframe in the last transmission subframe are guaranteed. The sum of the time zones is not less than 5% of the total time in the transmission frame for data transmission.

Example 16

When the transmission subframe is used for uplink and downlink transmission, it supports the uplink-downlink ratio of the existing LTE TDD system, or supports the new uplink-downlink ratio.

When a transmission subframe is used for uplink and downlink transmission, a subframe for uplink transmission and a subframe for downlink transmission are determined by one of the following methods:

Manner 1: Determine by semi-static high-level signaling, such as by using System Information Block 1 (SIB-1) to determine the proportion of subframes used for uplink transmission and for downlink transmission in the transmission frame.

Mode 2: Dynamic indication by dynamic signaling indication, such as by downlink control information (DCI) carried in a downlink control channel (PDCCH).

Method 3: Determine by scheduling, that is, when there is downlink control information for downlink allocation of the transmission subframe, the transmission subframe is used for downlink transmission; when there is downlink control information for uplink scheduling of the transmission subframe, The transmission subframe is used for uplink transmission.

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

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, a data transmission method and apparatus provided by an embodiment of the present invention have the following beneficial effects: solving the problem of the related method for performing data transmission on an unlicensed carrier in the related art, thereby achieving The effect of data transmission on an unlicensed carrier.

Claims

A data transmission method includes:

Detecting whether the unlicensed carrier is in an idle state;

In the case that the detection result is that the unlicensed carrier is in an idle state, data transmission is performed in the unlicensed carrier.
The method of claim 1, wherein detecting whether the unlicensed carrier is in an idle state comprises:

Detecting whether the unlicensed carrier is in an idle state by using an idle time region of a listening subframe in a transmission frame, where the transmission frame includes a listening subframe and a transmission subframe, the listening subframe and the transmitting The number of subframes is one or more, and the listening subframe includes one of the following:

Free time zone;

Idle time zone and data transmission zone;

The transmission subframe includes at least one of the following:

Data transmission area;

Data transfer area and idle time area.
The method of claim 2 wherein performing data transmission in the unlicensed carrier comprises:

Data transmission is performed in the unlicensed carrier by using a data transmission area of the listening subframe and the transmission subframe.
The method according to claim 2, wherein the length of the transmission frame is fixed or configured according to a predetermined rule, wherein configuring the transmission frame according to a predetermined rule comprises at least one of the following:

Configuring a length of the transmission frame according to a high-level configuration parameter;

The length of the transmission frame is configured in accordance with national or regional regulations regarding the regulation of unlicensed carriers.
The method of claim 4 wherein the location of the listening subframe in the transmission frame is fixed or configured.
The method of claim 5, wherein when the location of the listening subframe in the transmission frame is fixed, the listening subframe is located at a first predetermined number of children of a front end of the transmission frame And a second predetermined number of subframes on the frame or at the end of the transmission frame, wherein the first predetermined number and the second predetermined number are fixed or configured.
The method of claim 6, wherein detecting whether the unlicensed carrier is in an idle state comprises:

Detecting whether the unlicensed carrier is in an idle state on a plurality of the listening sub-frames, and detecting that the unlicensed carrier is in an idle state on one of the listening sub-frames, All listening sub-frames and all transmission sub-frames are used for data transmission.
The method of claim 2, wherein the length of the idle time region of the listening subframe is determined according to one of the following conditions:

The length of the idle time area of the listening subframe is a fixed length;

The length of the idle time region of the listening subframe is determined according to a predetermined parameter of the transmission frame;

The length of the idle time region of the listening subframe is determined according to a data transmission situation of a third predetermined number of subframes preceding the listening subframe;

The length of the idle time region of the listening subframe is the time required to detect whether the unlicensed carrier is in an idle state.
The method according to claim 8, wherein when the length of the idle time region of the listening subframe is a time required to detect whether the unlicensed carrier is in an idle state, an idle time region of the transmission subframe The length is determined according to one of the following conditions:

The length of the idle time region of the transmission subframe is a fixed length;

The length of the idle time region of the transmission subframe is determined according to a predetermined parameter of the transmission frame.
The method of claim 8 or 9, wherein the predetermined parameter of the transmission frame comprises a length of a time zone in the transmission frame for data transmission.
The method according to claim 8, wherein detecting whether the unlicensed carrier is in an idle state by using an idle time region in the listening subframe comprises:

When the length of the idle time region in the listening subframe is fixed or determined according to a predetermined parameter of the transmission frame, detecting whether the unlicensed carrier is idle at an end of the idle time region of the listening subframe a state, wherein after determining that the unlicensed carrier is in an idle state, performing data transmission on a data transmission time region of the listening subframe.
The method of claim 11 wherein said data comprises at least one of:

The authorized carrier assists access to the LAA proprietary signal, the LAA proprietary channel, and the service data, wherein the LAA-specific signal includes at least one of: a signal for indicating channel occupancy, a signal for implementing synchronization, and a channel for The measured reference signal, the LAA-specific channel includes: a channel for indicating channel occupancy and/or a channel for carrying system messages.
The method of claim 11, wherein the performing data transmission on the data transmission time zone of the listening subframe comprises at least one of the following:

Transmitting at least one of the following data on a data transmission time region of the listening subframe according to a length of a data transmission time region of the listening subframe: the LAA-specific signal, the LAA-specific channel, and the Business data;

Transmitting the LAA-specific signal and/or the LAA-specific channel on a data transmission time region of the listening subframe.
The method according to claim 13, wherein the data transmission on the data transmission time region of the listening subframe according to the length of the data transmission time region of the listening subframe comprises:

When the length of the data transmission time zone of the listening subframe is greater than the length of the LAA-specific signal and/or the length occupied by the LAA-specific channel by a fourth predetermined number of orthogonal frequency division multiplexing OFDM symbols, Transmitting the LAA-specific signal and/or the LAA-specific channel on the data transmission time zone of the listening subframe, and simultaneously transmitting the service data; otherwise, on the data transmission time zone of the listening subframe Transmitting the LAA-specific signal and/or LAA-specific channel, or transmitting the service data.
The method according to claim 2, wherein the number of the listening subframes and the length of time of data transmission in the listening subframe are determined according to a result of detection of whether the unlicensed carrier is in an idle state And/or determining the number of the transmitted subframes according to predetermined configuration parameters.
The method according to claim 15, wherein when there is a service transmission requirement, whether the unlicensed carrier is in an idle state is detected at the beginning of the subframe, the subframe is a listening subframe, if currently If the detection result of the listening subframe is that the unlicensed carrier is in an idle state does not satisfy the preset condition, the detecting is continued in the next subframe, and the next subframe is also a listening subframe until The predetermined condition is met.
The method of claim 16, wherein detecting, in the listening subframe, whether the unlicensed carrier is in an idle state comprises at least one of the following:

Determining, by the listening subframe, the fifth predetermined number of the ends when at least a fifth predetermined number of OFDM symbols in the end of the listening subframe are unavailable for detecting whether the unlicensed carrier is in an idle state The remaining OFDM symbols outside the OFDM symbol detect whether the unlicensed carrier is in an idle state, and when the detection result does not satisfy the preset condition, jump to the next listening subframe of the listening subframe. The unlicensed carrier is detected, wherein the length of the fifth predetermined number of OFDM symbols is at least the length occupied by the LAA-specific signal and/or the LAA-specific channel;

When all OFDM symbols of the listening subframe support detecting whether the unlicensed carrier is idle In the state, the interception subframe is used to detect whether the unlicensed carrier is in an idle state.
The method of claim 17, wherein at least a fifth predetermined number of OFDM symbols at the end of the listening subframe are unavailable for detecting whether the unlicensed carrier is in an idle state, at completion Performing data transmission on the time zone from the completion time of the detection to the end time of the listening subframe includes at least one of the following:

And performing data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe, where the data includes at least one of the following: an authorized carrier assisted access LAA proprietary signal, LAA proprietary Channel, business data;

The LAA-specific signal and/or the LAA-specific channel are transmitted at the completion time to the end of the listening subframe.
The method according to claim 18, wherein the data transmission according to the number of OFDM symbols included in the completion time to the end time of the listening subframe comprises at least one of the following:

When the length of the OFDM symbol included in the completion time to the end of the listening subframe is greater than the length of the LAA-specific signal and/or the length occupied by the LAA-specific channel by a sixth predetermined number of OFDM symbols, Transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol, and simultaneously transmitting the service data, and transmitting service data on a first subframe after the listening subframe;

The length of the OFDM symbol included in the completion time to the end of the listening subframe is greater than the length occupied by the LAA-specific signal and/or the LAA-specific channel and is greater than the LAA-specific signal and/or Or transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol when the length occupied by the LAA-specific channel is less than the sum of the sixth predetermined number of OFDM symbols, The service data is transmitted on the first subframe after the sub-frame is intercepted.
The method according to claim 17, wherein when all OFDM symbols of the listening subframe support detecting whether the unlicensed carrier is in an idle state, detecting whether the unlicensed carrier is in an idle state is completed After that, it also includes at least one of the following:

Transmitting data according to a time zone in which the completion of the detection of the unlicensed carrier is completed to a time zone of the end of the listening subframe, where the time zone from the completion time to the end time of the listening subframe includes The data transmission time zone of the listening subframe, where the data includes at least one of the following: an authorized carrier assisted access LAA proprietary signal, a LAA proprietary channel, and service data;

Transmitting a predetermined portion of the LAA-specific signal and/or the LAA-specific channel on an OFDM symbol included in a data transmission time region of the listening subframe, the first one after the listening subframe The subframe transmits the complete LAA-specific signal and/or the LAA-specific channel, and then transmits the service data.
The method of claim 20, further comprising at least one of the following:

When the length of the OFDM symbol included in the data transmission time zone of the listening subframe is greater than the length of the LAA-specific signal and/or the length occupied by the LAA-specific channel by a sixth predetermined number of OFDM symbols, Transmitting the LAA-specific signal and/or the LAA-specific channel on the OFDM symbol included, and simultaneously transmitting the service data, and transmitting service data on a first subframe after the listening subframe;

When the length of the OFDM symbol included in the data transmission time zone of the listening subframe is greater than the length occupied by the LAA-specific signal and/or the LAA-specific channel and is greater than the LAA-specific signal and / or the length of the LAA-specific channel occupation is less than the sum of the sixth predetermined number of OFDM symbols, transmitting the LAA-specific signal and/or the LAA-specific channel on the included OFDM symbol, Transmitting service data on the first subframe after the listening subframe;

When the number of OFDM symbols included in the data transmission time zone of the listening subframe is smaller than the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel, Transmitting a predetermined portion of the LAA-specific signal and/or the LAA-specific channel on the OFDM symbol, transmitting the complete LAA-specific signal and/or in the first subframe after the listening subframe The LAA proprietary channel, after which the service data is transmitted.
The method according to claim 14 or 19 or 21, wherein when the data transmission area of the listening subframe includes the number of the OFDM symbols greater than or equal to the LAA-specific signal and/or the LAA When the number of OFDM symbols occupied by the proprietary channel is equal to the number of OFDM symbols occupied by the LAA-specific signal and/or the LAA-specific channel in the last OFDM symbol of the listening subframe Transmitting the complete LAA-specific signal and/or the LAA-specific channel, and transmitting the service data or the preset portion of the LAA-specific signal and/or the LAA-specific channel in remaining OFDM symbols .
The method according to claim 18 or 20, wherein a time zone of the non-integer multiple OFDM symbol is used to transmit the completion when a data transmission region of the listening subframe includes a non-integer multiple of an OFDM symbol Partial repetition of the first complete OFDM symbol after the moment.
The method according to claim 2, wherein when the data to be transmitted includes a synchronization signal of a Long Term Evolution (LTE) system, data is performed on the unlicensed carrier by using the interception subframe and the transmission subframe. The transmission includes at least one of the following:

Transmitting a synchronization signal of the LTE system on a first transmission subframe after the detection of the unlicensed carrier is completed;

Transmitting a synchronization signal of the LTE system on a transmission subframe aligned with a subframe in which the carrier transmission synchronization channel is located;

And transmitting a synchronization signal of the LTE system on a data transmission area of the listening subframe.
The method according to claim 24, wherein, in the case of transmitting the synchronization signal of the LTE system on the first transmission subframe after the detection of the unlicensed carrier is completed, when the number of transmission subframes exceeds the number When seven predetermined number of subframes are transmitted, the synchronization signal of the LTE system is transmitted on an eighth predetermined number of subframes every interval from the first transmission subframe.
The method of claim 2 wherein said transmission subframe is for downlink data transmission and/or uplink data transmission.
The method according to claim 26, wherein when the transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, wherein the special subframe includes at least one of the following:

Downlink pilot time slot, uplink and downlink conversion guard interval, uplink pilot time slot, and idle time area.
The method according to claim 26, wherein when the transmission subframe is used for uplink and downlink data transmission, a special subframe is set in the transmission frame, wherein the intercept subframe includes at least one of the following :

Downlink pilot time slot, uplink and downlink conversion guard interval, uplink pilot time slot, idle time area, data transmission area.
The method according to any one of claims 27 to 28, wherein the sum of the listening subframe and the special subframe duration is a preset value.
The method of claim 29 wherein said sequence of transmission frames comprises one of:

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and the intercept subframe includes an idle time region. The sum of the durations of the special subframe and the listening subframe is a first preset time value;

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and the intercept subframe includes an uplink pilot slot. And the idle time area, the sum of the durations of the special subframe and the listening subframe is the first preset time value;

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and an uplink pilot slot, where the intercept subframe The idle time zone is included, and the sum of the durations of the special subframe and the listening subframe is the first preset time value;

a downlink transmission subframe, a special subframe, an uplink transmission subframe, and a listening subframe, where the special subframe includes a downlink pilot slot, an uplink and downlink transition protection interval, and an uplink pilot slot, where the intercept subframe a data transmission area and an idle time area, where a sum of durations of the special subframe and the listening subframe is a second preset time value;

a listening sub-frame, a downlink transmission sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time region and a downlink pilot time slot, where the special subframe includes uplink and downlink conversion protection time, The sum of the durations of the special subframe and the listening subframe is the first preset time value;

a listening sub-frame, a downlink sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time zone and a downlink pilot time slot, where the special subframe includes uplink and downlink conversion protection time and An uplink pilot time slot, where a sum of durations of the special subframe and the listening subframe is the first preset time value;

a listening sub-frame, a downlink sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an uplink pilot time slot, an idle time zone, and a downlink pilot time slot, where the special subframe includes Up and down transition protection time, the sum of the durations of the special subframe and the listening subframe is the first preset time value;

a listening sub-frame, a downlink sub-frame, a special sub-frame, and an uplink transmission sub-frame, where the listening sub-frame includes an idle time area and a data transmission area, where the special sub-frame includes a downlink pilot time slot, uplink and downlink Converting the guard time and the uplink pilot time slot, the sum of the durations of the special subframe and the listening subframe being the second preset time value;

a listening sub-frame, an uplink sub-frame, a special sub-frame, and a downlink transmission sub-frame, where the listening sub-frame includes a downlink pilot time slot, an idle time zone, and an uplink pilot time slot, and the special time slot includes uplink and downlink. Converting the guard time, the sum of the durations of the special subframe and the listening subframe is the first preset time value;

The listening sub-frame, the uplink transmission sub-frame, the special sub-frame, and the downlink transmission sub-frame, where the listening sub-frame includes an idle time area and an uplink pilot time slot, and the special time slot includes an uplink and downlink conversion protection time and a downlink guide. a frequency slot, a sum of durations of the special subframe and the listening subframe is the first preset time value;

a listening sub-frame, an uplink transmission sub-frame, a special sub-frame, and a downlink transmission sub-frame, where the listening sub-frame includes an idle time area and a data transmission area, and the special time slot includes an uplink pilot time slot, and uplink and downlink conversion protection. And a downlink pilot time slot, where a sum of durations of the special subframe and the listening subframe is the second preset time value.
The method according to claim 26, wherein when the transmission subframe is used for uplink and downlink data transmission, a subframe for performing uplink data transmission and a subframe for performing downlink data transmission are at least in the following manner A certain:

Determined by semi-static high-level signaling;

Through dynamic signaling instructions;

Determined by scheduling.
A data transmission device comprising:

a detecting module, configured to detect whether an unlicensed carrier is in an idle state;

And a transmission module, configured to perform data transmission in the unlicensed carrier if the detection result is that the unlicensed carrier is in an idle state.