WO2017049730A1

WO2017049730A1 - Lte transmission method and apparatus on unlicensed spectrum

Info

Publication number: WO2017049730A1
Application number: PCT/CN2015/093512
Authority: WO
Inventors: 李明菊; 朱亚军; 张云飞
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-09-25
Filing date: 2015-10-31
Publication date: 2017-03-30
Also published as: CN105338568A; CN105338568B

Abstract

Disclosed are an LTE transmission method and apparatus on an unlicensed spectrum so as to transmit a DRS and a PDSCH on a same subframe. The method comprises: monitoring an unlicensed spectrum on the basis of an LBT mechanism for sending a PDSCH; and when channel idle is monitored, the channel occupation time is superposed with the DMTC time of the DRS and a DRS sendable position is comprised in the superposed time, simultaneously sending the DRS and the PDSCH on a same subframe in the channel occupation time, the same subframe comprising the DRS sendable position. By executing embodiments of the present invention, a DRS and a PDSCH can be simultaneously sent on an unlicensed spectrum, so as to provide a user with better broadband experience, a higher speed, higher stability and better mobile convenience, and better coexistence with WiFi can be achieved.

Description

LTE transmission method and device on unlicensed spectrum

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for transmitting LTE over an unlicensed spectrum.

Background technique

With the dramatic increase in communication traffic, the 3rd Generation Partnership Project (3GPP) mandated spectrum is becoming less and less sufficient to provide higher network capacity. To further improve the utilization of spectrum resources, 3GPP is discussing how to use unlicensed spectrum, such as the 2.4 GHz and 5 GHz bands, with the help of licensed spectrum. These unlicensed spectrums are currently mainly used in systems such as WiFi, Bluetooth, radar, and medical. In general, access technologies designed for licensed bands, such as Long Term Evolution (LTE), are not suitable for use on unlicensed bands. Because access technologies such as LTE have very high requirements for spectrum efficiency and user experience optimization.

The carrier aggregation feature makes it possible to deploy LTE in unlicensed bands. 3GPP proposes the concept of LTE Assisted Access (LAA), which uses the help of LTE licensed spectrum to use unlicensed spectrum. Compared with WiFi, LTE operating in unlicensed bands has the ability to provide higher spectral efficiency and greater coverage, while seamlessly switching data traffic between licensed and unlicensed bands based on the same core network. For the user, this means a better broadband experience, higher speed, better stability and mobility.

In the licensed frequency band, the interference level is ensured in the LTE network due to the good orthogonality. Therefore, the uplink and downlink transmissions of the base station and the user equipment do not need to consider whether other base stations or user equipments are transmitting nearby. However, if LTE is used on an unlicensed band, it does not consider whether other devices are using unlicensed bands, which will cause great interference to the WiFi device. Because the LTE technology transmits the user equipment as long as there is a service, there is no monitoring rule, and the WiFi device cannot transmit when the LTE has a service transmission. Only when the LTE service transmission is completed, the channel idle state can be detected and transmitted. .

In order to coexist better with WiFi, the industry plans to add a Listen Before Talk (LBT) mechanism in LTE. In this way, if the LTE detects that the channel is busy on the unlicensed spectrum, the LTE cannot occupy the frequency band, and if the channel is detected to be idle, it can be occupied. For example, if the LTE wants to transmit the PDSCH (Physical Downlink Shared Channel) data on the unlicensed spectrum, the LBT mechanism needs to detect the channel idle time to occupy the channel to transmit the PDSCH.

In order to implement functions such as cell measurement and time-frequency synchronization, the cell (base station) needs to transmit a DRS (Discovery Reference Signal), and the DRS transmission takes 6 ms (milliseconds). This 6 ms time is called DMTC (DRS Measurement timing configuration, DRS measurement time configuration) time. The DMTC appears periodically, with a minimum period of 40 ms and a DMTC length of 6 ms. On the unlicensed spectrum, in order to reduce the interference to the WiFi, the 3GPP currently decides to configure the transmittable locations of multiple DRSs in the DMTC, and needs to perform the LBT mechanism based on the DRS transmission before transmitting, and can only occupy the channel if it detects that the channel is idle. .

On the unlicensed spectrum, how DRS and PDSCH are transmitted in the same subframe is currently needed to be studied.

Summary of the invention

It is an object of the present invention to provide a method and apparatus for transmitting LTE over an unlicensed spectrum to enable DRS to be transmitted in the same subframe as the PDSCH.

To achieve the above object, the present invention provides the following solutions:

A transmission method for LTE on an unlicensed spectrum, comprising:

Listening to whether the channel on the unlicensed spectrum is idle based on the LBT mechanism for transmitting the PDSCH;

When the channel is idle, and the current channel occupancy time overlaps with the DRS DMTC time, and the overlapping time includes one or more DRS transmittable positions, the same subframe in the channel occupation time Simultaneously transmitting the DRS and the PDSCH, where the same subframe includes a DRS transmittable location, where the channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum.

A transmission method for LTE on an unlicensed spectrum, comprising:

Receiving data transmitted on an unlicensed spectrum, the data including DRS and PDSCH simultaneously transmitted in the same subframe;

Decoding the data;

The DRS and the PDSCH are that the base station side monitors the channel idle on the unlicensed spectrum based on the LBT mechanism for transmitting the PDSCH, and overlaps with the DMTC time of the DRS in the current channel occupation time, and includes one or When a plurality of DRSs can transmit a location, which are simultaneously transmitted in the same subframe in the channel occupation time, the same subframe includes a DRS transmittable location, and the channel occupation time is sent on the unlicensed spectrum. Channel occupancy time of the PDSCH.

A transmission device for LTE on an unlicensed spectrum, comprising:

The first intercepting unit is configured to monitor, according to an LBT mechanism for transmitting the PDSCH, whether a channel on the unlicensed spectrum is idle;

The sending unit is configured to: when the channel is idle, and the DMTC time of the DRS overlaps in the current channel occupation time, and the one or more DRS transmittable locations are included in the overlapping time, during the channel occupation time The DRS and the PDSCH are simultaneously transmitted on the same subframe, and the same subframe includes a DRS transmittable location, where the channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum.

A transmission device for LTE on an unlicensed spectrum, comprising:

According to a specific embodiment provided by the present invention, the present invention discloses the following technical effects:

Listening to the channel idle on the unlicensed spectrum based on LTB, and this channel occupancy time When one or more DRS transmittable locations are included, the DRS and the PDSCH are simultaneously transmitted in the same subframe in the above channel occupation time. By implementing the embodiments of the present invention, DRS and PDSCH can be simultaneously transmitted on the unlicensed spectrum, which brings a better broadband experience, higher speed, better stability and mobile convenience to the user, and can be better with WiFi. Coexistence.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, other drawings may be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a schematic diagram of an application environment of a transmission method according to an embodiment of the present invention;

2 and 7 are schematic diagrams of a “collision” between a PDSCH and a DMTC according to an embodiment of the present invention;

3, 4, 6, 8, 11, 14, and 15 are schematic flowcharts of a method for transmitting LTE on a non-licensed spectrum of a base station side according to various embodiments of the present invention;

FIG. 5 is a schematic structural diagram of an LTE frame according to an embodiment of the present disclosure;

9a, 9b, 10, 12, and 13 are schematic diagrams of time-frequency resource allocation according to an embodiment of the present invention;

16-18 are schematic diagrams showing the structure of an LTE transmission apparatus on an unlicensed spectrum according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Embodiments of the present invention are directed to a method for transmitting LTE on an unlicensed spectrum and related devices.

The foregoing transmission method can be applied to a base station, a terminal, an AP (Access Point, wireless node), a Wifi terminal, a Relay station, and the like (but not limited to) a wireless communication device.

Figure 1 illustrates an application environment for the above described transmission method: applied to base station 101 to communicate with any number of terminals similar to access terminal 102, access terminal 104.

Access terminals

102 and 104 can be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device.

As mentioned above, the industry plans to add a Listen Before Talk (LBT) mechanism to LTE. In this way, if the LTE detects that the channel is busy on the unlicensed spectrum, the LTE cannot occupy the frequency band, and if the channel is detected to be idle, it can be occupied.

Currently, in order to transmit DRS on the unlicensed spectrum, an LBT mechanism is also required. DRS can be used to implement functions such as RRM measurement, downlink synchronization, time-frequency estimation, etc. Each symbolizable position of the DRS is the same in the symbol position occupied by each subframe, and occupies consecutive symbols (because it is discontinuous, it may be Other sending points steal the channel during the interruption time). The DRS can be transmitted in other subframes than

subframes

0, 5.

As previously known, the DMTC of the DRS occurs periodically, with a minimum period of 40 ms and a DMTC of 6 ms. The DRS has up to 6 transmittable locations in the middle of 6ms. The LBT mechanism is required before each transmittable location, and only the LBT detection channel is idle to transmit.

What happens if the DMTC time encounters the PDSCH transmission time period?

Figure 2 shows a scenario in which the PDSCH collides with the DMTC. After the LBT mechanism of the PDSCH is successful, the base station can occupy the channel to transmit PDSCH data. The channel occupancy time overlaps with the DMTC time. A transmittable location containing 3 DRSs.

It should be noted that the LBT mechanism of the DRS is different from the LBT mechanism sent by the PDSCH, and the DRS is more likely to preempt the channel.

If the PDSCH collides with the DMTC, there are two cases: one is that the PDSCH is not transmitted when the DRS is transmitted (that is, the DRS is sent separately); the other is that the DRS and the PDSCH are simultaneously transmitted. give away.

The following embodiments of the present invention will focus on a solution for simultaneous transmission of DRS and PDSCH.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a “transport method of LTE on an unlicensed spectrum”, which includes at least the following steps:

S301: Listening to whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH;

How to monitor based on the LBT mechanism for transmitting the PDSCH, please refer to the above description herein, and no further details are provided herein.

S302: Listening to the channel idle, and the current channel occupation time (the channel occupation time of transmitting the PDSCH on the unlicensed spectrum) overlaps with the DMTC time of the DRS, and the one or more DRSs can be sent in the overlapping time. At the time of the location, the DRS and the PDSCH are simultaneously transmitted in the same subframe in the above channel occupation time. Wherein, the same subframe includes the DRS transmittable location.

The scenario shown in FIG. 2 is still taken as an example: the channel occupation time of transmitting the PDSCH on the unlicensed spectrum overlaps with the DMTC time, and the transmit time of the three DRSs in the overlapping time may be referred to as the first one. The transmittable location, the second transmittable location, and the third transmittable location.

It is assumed that the subframe 6 includes the first transmittable location, the subframe 7 includes the second transmittable location, and the subframe 8 includes the third transmittable location. In this embodiment, the subframe 6 may be in the subframe 6. , or subframe 7 or subframe 8, or subframes 6 and 7, or subframes 7 and 8, or

subframes

6, 7, 8 transmit DRS and PDSCH simultaneously.

It is mainly seen where the PSS and SSS in the DRS are transmitted. For example, the PSS and the SSS can be transmitted on the subframe 6, and the 7th and 8th subframes can transmit the LTE legacy CRS, and these CRSs are also part of the DRS.

Therefore, the "same subframe" in the present invention is not limited to the fact that the DRS is transmitted together with the PDSCH only in a certain subframe, and the DRS can be transmitted together with the PDSCH in multiple subframes in the overlapping time, and each bearer DRS The subframes of the PDSCH and the PDSCH are both the same subframe as referred to in the present invention.

The term "simultaneous transmission" as used in the present invention should be understood to mean that transmission is performed simultaneously in the same subframe.

Embodiments of the present invention can implement that DRS and PDSCH are simultaneously transmitted on an unlicensed spectrum. Give users a better broadband experience, higher speed, better stability and mobility, while coexisting with WiFi better.

FIG. 4 is a schematic flowchart of another “transmission method of LTE on an unlicensed spectrum” according to another embodiment of the present invention, which may include the following steps:

S401: Monitor whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH.

This step is the same as S301 and will not be described again.

S402: When the channel idle is monitored, and the current channel occupancy time overlaps with the DMTC time of the DRS, and the overlapping time includes one or more DRS transmittable positions, the transmission time period of the DRS is configured to enable the DRS. Simultaneously transmitted with the PDSCH in the same subframe in the above channel occupation time.

The DRS transmission time period is a preset time interval for transmitting the DRS to be transmitted. The transmission time period can be in the same subframe or span several subframes.

Following the foregoing example, it is assumed that the overlapable time includes the transmittable positions of the three DRSs - the first transmittable location, the second transmittable location, and the third transmittable location. Meanwhile, the subframe 6 includes the first transmittable location, the subframe 7 includes the second transmittable location, and the subframe 8 includes the third transmittable location.

In this step of the embodiment, it can be configured in subframe 6, or subframe 7, or subframe 8, or subframes 6 and 7, or subframes 7 and 8, or

subframes

6, 7, and 8. The above (DRS) transmit DRS at the transmit position, and the

above subframes

6, 7, 8 will also carry the PDSCH. Then, the DRS and the PDSCH can be simultaneously transmitted on the same subframe in the channel occupation time (transmitting the PDSCH on the unlicensed spectrum).

S403: Simultaneously transmit the DRS and the PDSCH in the same subframe in the channel occupation time.

The same subframe includes a DRS transmittable location, where the channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum.

More specifically, step S403 may be further refined to: simultaneously transmit the DRS and the PDSCH in the same subframe of the channel occupation time according to the configured transmission time period of the DRS.

The foregoing mentioned that the DRS also has an LBT mechanism. Correspondingly, in other embodiments of the present invention, the transmission method in all the foregoing embodiments may further include the following steps:

LBT channel detection of DRS is performed on the unlicensed spectrum.

More specifically, the LBT mechanism is performed before each DRS can transmit a location, and only the LBT detection channel is idle to transmit the DRS.

It should be noted that, in an actual scenario, the transmission time of the PDSCH data may occupy multiple subframes, and the duration may be greater than the duration of the DRS transmission. Therefore, if the channel occupation time of the PDSCH overlaps with the DMTC time of the DRS, the unlicensed band channel is in an idle state during the overlap time.

In other embodiments of the present invention, when the channel occupation time of the current PDSCH overlaps with the DMTC time of the DRS, the LBT detection of the DRS may not be performed when the DRS is transmitted during the overlapping time.

More specifically, the LBT detection of the DRS may not be performed until each DRS can transmit a position within the above overlapping time.

For ease of understanding, LTE technology and DRS are further introduced.

Referring to FIG. 5, one LTE frame (that is, a radio frame) is 10 ms long, one LTE frame includes 10 subframes, and each subframe has a length of 1 ms; each subframe includes two slots, and each slot includes 7 symbols, that is, 1 subframe includes 14 symbols.

The LTE system allocates resources by allocating RBs (Resource Blocks). Still referring to FIG. 5, each RB is a resource that includes a time domain resource occupied by a time slot in time and a resource occupied by 12 subcarriers in frequency. The resource occupied by one subcarrier on one OFDM symbol is called RE (Resource Element). In normal CP mode, 1 RB = 12 * 7 REs.

As for the DRS, it may include multiple types of downlink reference signals, such as one or more of PSS, SSS, CRS, and CSI-RS. In the existing design, when the DRS is transmitted separately on the unlicensed spectrum, the length of each DRS does not exceed 1 ms.

Among them, the PSS (Primary Synchronization Signal) in the frequency domain occupies 6 RBs of the system bandwidth, that is, 72sc (subcarrier), and SSS (Secondary Synchronization Signal, auxiliary The step signal) also occupies 6 RBs in the frequency domain.

As mentioned above, if the PDSCH collides with the DMTC, the PDSCH may not be transmitted when the DRS is transmitted (hereinafter referred to as DRS only), and the DRS and the PDSCH may be simultaneously transmitted.

In the present invention, the design of the DRS when the DRS is transmitted together with the PDSCH can be the same as the design of the DRS when the DRS only, and the design of the two can be different.

This article first describes how to configure the DRS transmission time period when the design is the same.

When the DRS is transmitted together with the PDSCH, the design of the DRS is the same as the design of the DRS when the DRS only is the same. The length of the DRS is less than 1 ms, and the PSS, SSS, and the like included in the DRS are transmitted inside one subframe.

Referring to FIG. 6, when the design is the same, the LTE transmission method on the unlicensed spectrum may include the following steps:

S601: Monitor whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH.

This step is the same as S401 and will not be described again.

S602: When the channel idle is monitored, and the current channel occupancy time overlaps with the DRS DMTC time, and the overlap time includes a DRS transmittable location, the configuration DRS is sent at the transmittable location.

That is, the foregoing step "configuring the transmission time period of the DRS" may be refined to include: when only one DRS transmittable location is included in the channel occupation time, the configuration DRS is transmitted at the transmittable location.

Referring to FIG. 7, it is assumed that only one DRS transmittable location is included in the overlapping time, and the transmittable location is included in the subframe 9, and in this step of the embodiment, the (DRS) of the subframe 9 can be configured. The DRS can be transmitted at the transmit position, and the above subframe 9 will also carry the PDSCH. Then, the DRS and the PDSCH can be simultaneously transmitted on the subframe 9.

When the DRS only design is the same, the length of the DRS is less than 1 ms. Therefore, further, the following configuration may be performed: the PDSCH is filled on the time-frequency resources that are not occupied by the DRS in the time period occupied by the DRS.

For example, referring to FIG. 9a, it is assumed that the DRS includes the PSS and the SSS, the DRS occupies the 5-8th symbol of the subframe, the PSS included in the DRS occupies the 7th symbol, the SSS occupies the 6th symbol, and the PSS and the SSS Only occupy the middle 6RB. The CRS included in the DRS occupies the 5th symbol and the 8th symbol. Then the bandwidth other than the middle 6 RB of the 6th symbol and the 7th symbol can fill the PDSCH.

S603: Simultaneously transmit the DRS and the PDSCH in the same subframe in the channel occupation time.

This step is the same as that of S403 and will not be described again.

If the channel occupancy time includes multiple DRS transmittable locations, refer to a process schematic diagram shown in FIG. 8, which may include the following steps:

S801: Monitor whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH.

This step is the same as S601 and will not be described again.

S802: When the channel idle is monitored, and the current channel occupancy time overlaps with the DRS DMTC time, and the overlapping time includes multiple DRS transmittable locations, the configuration DRS is sent in the first DRS transmittable location, Either the configuration DRS is sent at the last DRS transmittable location, or if there is a DRS transmittable

location occupying subframe

0 or 5, the configuration DRS is sent at the transmittable location.

That is, the foregoing step "configure the transmission time period of the DRS" can be refined to include:

When a plurality of DRS transmittable locations are included in the channel occupation time, the configuration DRS is sent at the first DRS transmittable location, or

Configure the DRS to be sent at the last DRS sendable location, or,

If there is a DRS transmittable

location occupying subframe

0 or 5, the configuration DRS is sent at the transmittable location.

For example, referring still to FIG. 2, it is assumed that the overlapping time includes

subframes

6, 7, and 8, and subframe 6 includes the first transmittable location in the DMTC, and subframe 7 includes the second of the DMTCs. The location can be transmitted, and subframe 8 contains the third transmittable location in the DMTC.

Then, in this step of the embodiment, the configurable DRS is sent at the first DRS transmittable location (the transmittable location of the subframe 6), or the DRS is configured at the last DRS transmittable location (the transmittable of the subframe 8) Location) sent.

If the overlapping time includes

subframes

4, 5, and 6, and subframe 4 contains the first one in the DMTC. The location can be transmitted, the subframe 5 includes the second transmittable location in the DMTC, and the subframe 6 includes the third transmittable location in the DMTC. At this time, there is a DRS transmittable location occupying the subframe 5, and the DRS is configured. Subframe 5 is sent at the transmittable location.

That is, if there is a DRS transmittable

location occupying subframe

0 or 5, the preferentially configured DRS is transmitted at the transmittable location.

S803: The DRS and the PDSCH are simultaneously sent in the same subframe in the channel occupation time.

This step is the same as that of S803 and will not be described again.

In other embodiments of the present invention, the “configuring the transmission time period of the DRS” in all the foregoing embodiments may further include the following steps:

The time-frequency resource that is not occupied by the DRS is filled with at least one of a PSS, an SSS, a CRS (Cell specific refer signal), and a CSI-RS (Channel state information-reference signal).

When the DRS only design is the same, the length of the DRS is less than 1 ms, and the PSS and or SSS and or downlink reference signals (one or more of CRS or CSI-RS) are filled on the time-frequency resources that are not occupied by the DRS. Achieve the need to continuously send and occupy 80% of the bandwidth.

For example, referring to FIG. 9b, it is assumed that the DRS includes PSS and SSS, the DRS occupies the 5-8th symbol of the subframe, the PSS included in the DRS occupies the 7th symbol, the SSS occupies the 6th symbol, and the PSS and the SSS only Take up 6RB in the middle. The CRS included in the DRS occupies the 5th symbol and the 8th symbol. Then, the bandwidth other than the middle 6 RB of the 6th symbol and the 7th symbol may be filled with a sequence of existing RSs (at least one of PSS, SSS, CRS, and CSI-RS), or may be filled with a new downlink reference signal.

In the following, the design of the DRS when the DRS is transmitted together with the PDSCH is different from the design of the DRS when the DRS only is used, how to design the DRS, and the transmission time period of the DRS.

When the design is different, when the DRS is transmitted together with the PDSCH, the DRS can be designed to have a length of no more than 5 ms, and the number of symbols occupied is not less than four. The DRS includes at least PSS, SSS, CRS, and configurable CSI-RS.

That is, unlike DRS only, the DRS length here can be greater than 1ms, of course, in some In case, the length of the DRS can also be less than 1ms (described later in this article).

When the DRS length is greater than 1 ms, the DRS will occupy multiple subframes for transmission. The configuration of the transmission time period of the DRS may specifically include:

The PSS and the SSS included in the configuration DRS are sent only in one subframe. At the same time, the PSS occupies the seventh symbol of the subframe, the SSS occupies the sixth symbol of the subframe, and only occupies the bandwidth of the middle 6 RB.

The PDSCH is configured on the time-frequency resources that are not occupied by the other DRSs of the PSS and the SSS. The time-frequency resources that are not occupied by the DRS in the time period occupied by the DRS are specifically the time-frequency resources that are not occupied by the DRS in the time period occupied by the DRS.

For example, referring to FIG. 10, it is assumed that the DRS occupies the 4th symbols of the 5th-8th, wherein the PSS included in the DRS occupies the 7th symbol, the SSS occupies the 6th symbol, and the CRS occupies the 5th symbol and the 8th. The symbols, since the PSS and the SSS occupy only the middle 6 RB of the 7th symbol and the 6th symbol, the 7th symbol and the other RBs of the 6th symbol may fill the PDSCH.

As for other downlink reference signals included in the DRS, such as CRS and CSI-RS, it can be transmitted in multiple subframes without new design.

FIG. 11 shows another flow diagram of a LTE transmission method on an unlicensed spectrum when the DRS only design is different, which may include the following steps:

S1101: Monitor whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH. This step is the same as that of S801 and will not be described again.

S1102: When the channel idle is monitored, and the DMTC time of the DRS overlaps with the DVS, and the transmit time of the PSS and the SSS included in the multiple DRSs is overlapped, the length of the configured DRS is greater than 1ms;

It should be noted that, since the CRS and the CSI-RS can be transmitted in a subframe without PSS/SSS transmission, the transmittable position in this embodiment is a transmittable position of the PSS and the SSS included in the DRS. In order to distinguish from the DRS transmittable position in the foregoing embodiment, the “DRS transmittable location” may be referred to as a first transmittable location, and the “transmittable location of the PSS and the SSS included in the DRS” may be referred to as a second transmittable. position.

S1103: Configuring the PSS and the SSS included in the DRS to be sent in the first transmittable location, or configuring the PSS and the SSS included in the DRS to be sent in the last transmittable location, or if there is an occupation of the

subframe

0 or 5 When the PSS and SSS included in the DRS can transmit a location, the DRS is configured to be sent at the transmittable location.

An example is given below: it is assumed that the overlapping time includes

subframes

6, 7, and 8, and subframe 6 includes a first second transmittable location, subframe 7 includes a second second transmittable location, and subframe 8 includes The third second transmittable location.

In this step of the embodiment, the PSS and the SSS included in the configurable DRS are transmitted in the first second transmittable location (the second transmittable location of the subframe 6), and the PSS included in the DRS may be configured. And the SSS is transmitted at the third second transmittable location (second transmittable location of subframe 8).

If the overlapping time includes

subframes

4, 5, and 6, and subframe 4 includes the first second transmittable location, subframe 5 includes the second second transmittable location, and subframe 6 includes the third. The second transmittable location, in which case there is a second transmittable location occupying the subframe 5, the PSS and the SSS included in the configuration DRS are transmitted at the second transmittable location of the subframe 5.

That is, if there is a second transmittable

location occupying subframe

0 or 5, the PSS and SSS included in the preferentially configured DRS are transmitted at the second transmittable location.

S1104: Configure at least one of the CRS and the CSI-RS in the foregoing DRS to occupy a time-frequency location specified by the LTE system, and fill the PDSCH on other time-frequency resources.

More specifically, under the 2TX transmission port, the CRS can occupy the first 1, 5, 8, and 12 symbols; under the 4TX transmission port, the CRS can occupy the first, second, fifth, eighth, ninth, and twelve symbols.

The CSI-RS can occupy the 10th, 11th symbols, and the partial REs on the 6, 7, 13, and 14 symbols.

Referring to FIG. 12 and FIG. 13, it is assumed that the DRS occupies the subframe 6 and the subframe 7, wherein the PSS included in the DRS occupies the seventh symbol of the subframe 6, and the SSS occupies the sixth symbol of the subframe 6, and only occupies the middle. 6 RB, the PDSCH may be filled in the 6th symbol of the subframe 6 not occupied by the PSS and the SSS in the DRS and the bandwidth other than the middle 6 RB at the 7th symbol.

For subframe 7, the 6th and 7th symbols are filled with PDSCH over the entire bandwidth.

S1105: The DRS and the PDSCH are simultaneously sent in the same subframe in the channel occupation time.

This step is the same as that of S803 and will not be described again.

FIG. 14 shows still another flow diagram of a LTE transmission method on an unlicensed spectrum when the DRS only design is different, which may include the following steps:

S1401: Listening to whether the channel on the unlicensed spectrum is idle based on an LBT mechanism for transmitting the PDSCH.

This step is the same as S1101 and will not be described again.

S1402: When the channel idle is monitored, and the DMTC time of the DRS overlaps in the current channel occupation time, and the transmit time of the PSS and the SSS included in the DRS is included in the overlap time, the DRS includes The PSS and SSS are sent at the transmittable location.

In this embodiment, the DRS is transmitted with a length shorter than 1 ms. The DRS may occupy the 5-8th symbol of the subframe or occupy the 1st to 12th symbols of the subframe.

In the 5-8th symbol or the 1st-12th symbols occupied by the DRS, the PSS in the DRS occupies the 7th symbol, and the SSS in the DRS occupies the 6th symbol. Therefore, in this embodiment, the transmittable position of the PSS/SSS included in the DRS is the seventh and sixth symbols of a certain subframe.

S1403: At least one of the CRS and the CSI-RS in the DRS is configured to occupy a time-frequency location specified by the LTE system, and the other time-frequency resources are filled with the PDSCH.

S1404: The DRS and the PDSCH are simultaneously sent in the same subframe in the channel occupation time.

This step is the same as S1105 and will not be described again.

It should be noted that, in the existing LTE protocol, the PSS and the SSS are required to occupy the sixth and seventh symbols of the

subframe

0 or 5, and the sixth and seventh symbols of the other subframes can be used to transmit the PDSCH. In the present invention, the PSS and the SSS can be transmitted on subframes other than

subframes

0 and 5, occupying subframes other than

subframes

0 and 5. The 7th and 6th symbols.

In other embodiments of the present invention, the transmission method provided by all the foregoing embodiments may further include the following steps:

When the DRS is configured or the PSS/SSS included in the DRS is configured to be transmitted on subframes other than

subframes

0 and 5, different subframes or scrambling codes are used in the subframe index to indicate different subframes.

Traditional SSS has two sequences to zone

molecular frames

0 and 5. Since in the present invention, the subframes that the PSS/SSS included in the DRS may occupy are not limited to

subframes

0 and 5, but may be transmitted on subframes 0-9, 10 different SSS sequences may be used to distinguish the indications. Subframes 0-9.

Similarly, 10 different scrambling codes can be used to distinguish the indication subframes 0-9.

In other embodiments of the present invention, the method provided by all the foregoing embodiments may further include the following steps:

When the DRS is configured or the PSS/SSS included in the DRS is configured to be transmitted on a subframe other than the

subframes

0 and 5, the indication of any one of the PSS, SSS, CRS, and CSI-RS or any combination of the filling manners is used to indicate Different sub-frames.

More specifically, at least one of PSS, SSS, CRS, and CSI-RS may be padded on an unoccupied time-frequency resource on a time period occupied by the PSS and the SSS included in the DRS to indicate different subframes.

Specifically, any one or any combination of PSS, SSS, CRS, and CSI-RS may be padded on the unoccupied bandwidth of the PSS/SSS to indicate different subframes.

For example, if SSS already has 2 sequences, then SSS sequence 1 can be used for subframes 0-4, and SSS sequence 2 can be used for subframes 5-9. The padding method mainly considers those REs on the bandwidth that PSS/SSS does not occupy. For example, the PSS indicates the subframe 1 on the unoccupied bandwidth, the full pad SSS indicates the subframe 2, the full pad CRS indicates the subframe 3, and the full pad CSI-RS indicates the subframe 4.

The combination may also be padded, for example, padding the PSS indicator subframe 6 on the unoccupied bandwidth of the 6th symbol, filling the SSS indication subframe 7 on the unoccupied bandwidth of the 7th symbol, or filling the CRS indication on the unoccupied bandwidth of the 6th symbol Subframe 8, the unoccupied bandwidth of the 7th symbol is filled with the SSS indication subframe 9. There are many combinations that can be made, and will not be repeated here.

In other embodiments of the present invention, the method in all the foregoing embodiments may further include:

Transmitting RRC signaling to indicate a time-frequency location occupied by the DRS;

The sending DCI signaling indicates whether there is DRS transmission in the current subframe of the user.

In other embodiments of the present invention, when there is DRS transmission in the current subframe, and the DRS design when the DRS only and the DRS are simultaneously transmitted with the PDSCH, the DCI signaling may also be used to indicate the design type of the DRS. The design types of DRS include DRS only type and DRS and PDSCH simultaneous transmission types.

More specifically, when the DRS design is the same when the DRS only and the DRS are simultaneously transmitted with the PDSCH, the 1 bit data may be used in the DCI signaling to indicate whether there is DRS transmission in the current subframe of the user.

Further, the 1-bit data value may be 0 or 1: '0' indicates that the RB in which the user is allocated has no DRS transmission in the subframe, but a PDSCH sent; '1' indicates that the user is assigned to In the RB, there is DRS transmission in this subframe, there is no PDSCH, and it needs to be bypassed when receiving decoding.

When the DRS design is different when the DRS only and the DRS are simultaneously transmitted with the PDSCH, the DCI signaling needs 2 bits to indicate whether there is DRS transmission in the current subframe and the design type of the DRS when there is DRS transmission: for example, “00” indicates that there is no DRS transmission, "01" indicates the design type with DRS transmission and DRS only, and "10" indicates the design type with DRS transmission and simultaneous transmission using DRS and PDSCH.

As for at least one of the CRS and the CSI-RS, which can occupy the time-frequency position specified by the LTE system, the present invention does not specifically design the signaling indication CRS and the CSI-RS.

In addition, it should be noted that the RRC command is transmitted before the DRS and the PDSCH are transmitted, and the DCI can be transmitted together with the DRS and the PDSCH.

The RRC signaling may indicate the time-frequency location occupied by the DRS of the user: for example, in the case of DRS single transmission, it may indicate which symbols and which RBs the DRS occupies; in the case of simultaneous transmission of the DRS and the PDSCH, the RRC may indicate that one subframe is simultaneously transmitted. When the multiple consecutive subframes are simultaneously transmitted, which symbols and which RBs the DRS occupies.

After the user knows the time-frequency position occupied by the DRS, it knows that the time-frequency position occupied by the DRS is transmitted without the PDSCH, so these time-frequency positions are bypassed during decoding.

The foregoing embodiments are all transmission methods performed by the base station side, and the transmission side of the user terminal side will be described below. law.

Referring to FIG. 15, the method for transmitting LTE on the unlicensed spectrum performed by the user terminal side may include:

S1501: Receive data transmitted on an unlicensed spectrum;

The foregoing data includes DRS and PDSCH that are simultaneously transmitted on the same subframe;

S1502: Decode the above data;

The DRS and the PDSCH are that the base station side monitors the channel idle on the unlicensed spectrum based on the LBT mechanism for transmitting the PDSCH, and overlaps with the DMTC time of the DRS in the current channel occupation time, and includes one or When a plurality of DRSs can transmit a location, which are simultaneously transmitted in the same subframe in the channel occupation time, the same subframe includes the DRS transmittable location.

For details, please refer to the foregoing descriptions herein, and no further details are provided herein.

In other embodiments of the present invention, the method performed by the user terminal may further include the following steps:

Receiving an RRC indicating a time-frequency location occupied by the DRS;

Receiving DCI signaling indicating whether there is DRS transmission in the current subframe of the user.

In other embodiments of the present invention, when there is DRS transmission in the current subframe and the DRS design when the DRS only and the DRS are simultaneously transmitted with the PDSCH, the DCI signaling may also be used to indicate the design type of the DRS. The design type may include a DRS separate transmission type, and a DRS and PDSCH simultaneous transmission type.

The RRC command is sent before the DRS and the PDSCH are transmitted, and the DCI can be sent together with the DRS and the PDSCH. That is, the data transmitted on the unlicensed spectrum received in step S1501 may include the above DCI signaling.

Moreover, when the DRS design when DRS only and DRS are simultaneously transmitted with the PDSCH is different, 2 bits are required to indicate, for example, “00” indicates that there is no DRS transmission, “01” indicates that there is DRS transmission and the design type of DRS only is used, “10” A design type indicating that there is DRS transmission and simultaneous transmission using DRS and PDSCH.

In other embodiments of the present invention, if the design of the DRS is the same as that of the DRS when the DRS is transmitted together with the PDSCH, the step of decoding the data may specifically include:

Determining, according to the foregoing indications of the RRC and the DCI, whether the time-frequency position occupied by the DRS and the current subframe have DRS transmission; and determining that the current subframe has DRS transmission, the data at the time-frequency position occupied by the DRS is not decoded.

If the design of the DRS is different from the design of the DRS when the DRS is transmitted together with the PDSCH, the step of decoding the data may specifically include:

Determining, according to the foregoing indications of the RRC and the DCI, a time-frequency position occupied by the DRS, whether the current subframe has a DRS transmission, and a design type of the DRS when the current subframe has a DRS transmission; and determining that the current subframe has a DRS transmission, according to The design type of the DRS does not decode the data at the time-frequency position occupied by the above DRS.

Of course, for the foregoing description, when the PDSCH fills the unoccupied time-frequency resources in the time period occupied by the DRS, the user also knows, according to the RRC signaling, where the PDSCH is filled in the time-frequency resources occupied by the DRS, and the PDSCH is occupied. Data users need to decode.

After the method is introduced, the following embodiments will describe the transmission device of LTE on the unlicensed spectrum, and the transmission device is used to perform the above transmission method.

More specifically, the transmission device can be used as a base station or an access terminal.

When used as a base station, referring to FIG. 16, the transmission device 1600 may include a first listening unit 1601 and a transmitting unit 1602, where:

The first monitoring unit 1601 is configured to monitor, according to an LBT mechanism used to send the PDSCH, whether a channel on the unlicensed spectrum is idle;

The sending unit 1602 is configured to: when the channel is idle, and the DMTC time of the DRS overlaps in the current channel occupation time, and the one or more DRS transmittable locations are included in the overlapping time, during the channel occupation time Simultaneously transmitting the above DRS and the PDSCH on the same subframe includes the DRS transmittable location on the same subframe.

The channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum. For details, please refer to the foregoing description in this document, and details are not described herein again.

In other embodiments of the present invention, still referring to FIG. 16, the apparatus 1600 in all the foregoing embodiments may further include:

The configuration unit 1603 is configured to: before the first sending unit 1601 simultaneously transmits the DRS and the PDSCH, configure a transmission time period of the DRS, so that the DRS and the PDSCH are simultaneously transmitted in the same subframe in the channel occupation time.

Correspondingly, the sending unit 1602 is specifically configured to send the DRS and the PDSCH simultaneously in the same subframe of the channel occupation time according to the configured transmission time period of the DRS.

In other embodiments of the present invention, the apparatus in all the foregoing embodiments may further include: a second intercepting unit, configured to perform LBT channel detection of the DRS on the unlicensed spectrum.

In an actual scenario, the transmission time of the PDSCH data may occupy multiple subframes, and the duration may be greater than the duration of the DRS transmission. Therefore, if the channel occupation time of the PDSCH overlaps with the DMTC time of the DRS, the unlicensed band channel is in an idle state during the overlap time. Therefore, in other embodiments of the present invention, when the channel occupancy time of the current PDSCH overlaps with the DMTC time of the DRS, the second intercepting unit may not perform the LBT detection of the DRS when transmitting the DRS in the overlapping time.

For details, refer to the description of the foregoing method section, and details are not described herein.

As mentioned above, if the PDSCH collides with the DMTC, the PDSCH may not be transmitted when the DRS is transmitted. The transmission (hereinafter referred to as DRS only) can also be sent simultaneously with DRS and PDSCH.

When the design is the same, the configuration unit 1603 may be specifically configured to:

When only one DRS transmittable location is included in the channel occupancy time, the DRS is configured to be sent at the transmittable location.

For details, see above and I will not repeat them here.

If the channel occupancy time includes a plurality of DRS transmittable locations, the configuration unit 1603 may be specifically configured to:

Configuring the above DRS to be sent at the first DRS transmittable location, or,

Configuring the above DRS to be sent at the last DRS transmittable location, or,

If there is a DRS transmittable

location occupying subframe

0 or 5, the above DRS is configured to be transmitted at the transmittable location.

The transmittable location in this embodiment refers to a DRS transmittable location.

The details are detailed above and will not be described.

The length of the DRS is less than 1 ms. To achieve the requirement of continuously transmitting and occupying 80% of the bandwidth, the configuration unit 1603 may be further configured to:

The time-frequency resources that are not occupied by the DRS on the time period occupied by the DRS are filled with PSS and or SSS and or CRS and or CSI-RS.

For details, see above and I will not repeat them here.

In the embodiment of the present invention, when the DRS is transmitted together with the PDSCH, the DRS can be designed to have a small length. At 5ms, the number of symbols occupied is not less than four. The DRS includes at least PSS, SSS, CRS, and configurable CSI-RS.

That is, unlike DRS only, the DRS length here can be greater than 1 ms. Of course, in some cases, the length of the DRS can also be less than 1 ms (described later in this document).

When the DRS length is greater than 1 ms, the DRS will occupy multiple subframes for transmission. Based on the above, in other embodiments of the present invention, in the foregoing configuration, the configuration unit 1603 in all the foregoing embodiments may be specifically configured to:

When the length of the DRS is greater than 1 ms, the PSS and the SSS included in the configuration of the DRS are transmitted in only one subframe, and the PSS occupies the seventh symbol of the subframe, and the SSS occupies the sixth symbol of the subframe, and only Occupies the bandwidth of the middle 6RB;

The PDSCH is configured to be allocated on time-frequency resources that are not occupied by other DRSs of the subframes in which the PSS and the SSS are transmitted. The time-frequency resource that is not occupied by other DRSs is a time-frequency resource that is not occupied by the DRS in the time period occupied by the DRS.

The details are detailed above and will not be described here.

In the other embodiments of the present invention, the configuration unit in all the foregoing embodiments is used to configure the transmission time period of the DRS in the foregoing embodiment, when the channel occupancy time includes the transmittable locations of the PSS and the SSS included in the multiple DRSs. 1603 can be used specifically for:

The length of the above DRS is configured to be greater than 1 ms.

Configuring the PSS and SSS included in the DRS whose length is greater than 1 ms to be sent in the first transmittable location, or,

Configuring the PSS and SSS included in the DRS whose length is greater than 1 ms to be sent at the last transmittable location, or,

If there is a PSS and SSS transmittable location included in the

DRS occupying subframe

0 or 5, the DRS configured to have a length greater than 1 ms is transmitted at the transmittable location.

At least one of the CRS and the CSI-RS in the DRS occupies a time-frequency location specified by the LTE system, and the other time-frequency resources are filled with the PDSCH.

The details are detailed above and will not be described here.

In the other embodiments of the present invention, the configuration unit in all the foregoing embodiments is used to configure the transmission time period of the DRS in the foregoing embodiment, when the channel occupancy time includes only the transmittable locations of the PSS and the SSS included in the DRS. 1603 can be used specifically for:

Configuring the PSS and SSS included in the above DRS to be sent at the transmittable location;

The CRS and or the CSI-RS in the DRS occupy the time-frequency position specified by the LTE system, and the other time-frequency resources are filled with the PDSCH.

The details are detailed above and will not be described here.

In other embodiments of the present invention, referring to FIG. 17, the apparatus in all the above embodiments may further include the following components:

The first indication unit 1701 is configured to: when the PSS and the SSS included in the configuration DRS or the DRS are sent on the subframes other than the

subframes

0 and 5, use different SSS sequences or scrambling codes in the subframe index to indicate different children. frame.

The details are detailed above and will not be described here.

In other embodiments of the present invention, still referring to FIG. 17, the apparatus in all the above embodiments may further include the following components:

The second indication unit 1702 is configured to use different PSS, SSS, CRS, and CSI-RS filling manners when configuring the foregoing DRS or the PSS and the SSS included in the DRS to be sent on subframes other than the

subframes

0 and 5. To indicate different subframes.

The details are detailed above and will not be described here.

In order to notify the user, in other embodiments of the present invention, the sending unit 1602 in all the above embodiments may also be used to:

The RRC command is sent before the DRS and the PDSCH are transmitted, and the DCI can be sent together with the DRS and the PDSCH.

More specifically, when the DRS design of the DRS only and the DRS is the same as that of the PDSCH, the 1 bit data may be used in the DCI signaling to indicate whether there is DRS transmission in the current subframe of the user.

The details are detailed above and will not be described here.

The transmission device as a user equipment will be described below. Referring to FIG. 18, when acting as a user equipment, the LTE transmission device 1800 on the unlicensed spectrum may include:

The receiving unit 1801 is configured to receive data transmitted on an unlicensed spectrum;

The above data includes DRS and PDSCH transmitted simultaneously on the same subframe.

The decoding unit 1802 is configured to decode the foregoing data.

The DRS and the PDSCH are that the base station side monitors the channel idle on the unlicensed spectrum based on the LBT mechanism for transmitting the PDSCH, and overlaps with the DMTC time of the DRS in the current channel occupation time, and includes one or When a plurality of DRSs can transmit a location, the same subframe is simultaneously transmitted in the same subframe, and the same subframe includes a DRS transmittable location, where the channel occupied time is a channel occupied by transmitting the PDSCH on the unlicensed spectrum. time.

In other embodiments of the present invention, the receiving unit 1801 in all the foregoing embodiments may be further configured to:

Receiving an RRC indicating a time-frequency location occupied by the DRS;

The RRC command is sent before the DRS and the PDSCH are transmitted, and the DCI can be sent together with the DRS and the PDSCH. That is, the data transmitted on the unlicensed spectrum that is received may include the DCI signaling described above.

In other embodiments of the present invention, if the DRS is transmitted together with the PDSCH, the design of the DRS is the same as the design of the DRS when the DRS is transmitted separately. In decoding the data, the decoding unit 1802 in all the above embodiments may be specifically used for:

In other embodiments of the present invention, if the DRS is transmitted together with the PDSCH, the design of the DRS is different from the design of the DRS when the DRS is separately transmitted. In terms of decoding data, all of the above embodiments The decoding unit 1802 can be specifically configured to:

Determining, according to the foregoing indications of RRC and DCI, a time-frequency location occupied by the DRS, whether the current subframe has DRS transmission, and a design type of the DRS when the current subframe has DRS transmission;

When it is determined that the current subframe has DRS transmission, the data at the time-frequency position occupied by the DRS is not decoded according to the design type of the DRS.

Of course, for the foregoing description, when the PDSCH fills the unoccupied time-frequency resources in the time period occupied by the DRS, the user equipment also knows, according to the RRC signaling, where the PDSCH is filled in the time-frequency resources occupied by the DRS. The PDSCH data user needs to decode.

For details, please refer to the above introduction, which will not be described here.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

The principles and embodiments of the present invention are described herein with reference to specific examples. The description of the above embodiments is only for the purpose of understanding the method of the present invention and the core idea thereof. Also, the present invention is based on the present invention. The ideas will change in the specific implementation and application scope. In summary, the content of the specification should not be construed as limiting the invention.

Claims

A transmission method for LTE on an unlicensed spectrum, characterized in that it comprises:

Listening to whether the channel on the unlicensed spectrum is idle based on the LBT mechanism for transmitting the PDSCH;

When the channel is idle, and the current channel occupancy time overlaps with the DRS DMTC time, and the overlapping time includes one or more DRS transmittable positions, the same subframe in the channel occupation time Simultaneously transmitting the DRS and the PDSCH, where the same subframe includes a DRS transmittable location, where the channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum.
The method of claim 1, further comprising: before simultaneously transmitting the DRS and the PDSCH,

And configuring a transmission time period of the DRS, so that the DRS and the PDSCH are simultaneously transmitted in the same subframe in the channel occupation time.
The method of claim 2, wherein the configuring the transmission time period of the DRS comprises:

When the channel occupation time includes only one DRS transmittable location, configuring the DRS to be sent at the transmittable location;

When the plurality of DRS transmittable locations are included in the channel occupation time, configuring the DRS to be sent in the first DRS transmittable location, or

Configuring the DRS to be sent at the last DRS transmittable location, or,

If there is a DRS transmittable location occupying subframe 0 or 5, the DRS is configured to be sent at the transmittable location.
The method of claim 3, wherein the length of the DRS is less than 1 ms, and the configuring the transmission period of the DRS further comprises:

The time-frequency resources that are not occupied by the DRS on the time period occupied by the DRS are filled with PSS and or SSS and or CRS and or CSI-RS.
The method of claim 2, wherein the length of the DRS is no more than 5 ms, The number of symbols occupied is not less than four; the DRS includes at least PSS, SSS, CRS, and configurable CSI-RS.
The method of claim 5, wherein the configuring the transmission time period of the DRS comprises:

When the length of the DRS is greater than 1 ms, the PSS and the SSS included in the DRS are configured to be transmitted in only one subframe, and the PSS occupies the seventh symbol of the subframe, and the SSS occupies the subframe. The sixth symbol, and only occupy the bandwidth of the middle 6RB;

And configuring, on the time-frequency resource that is not occupied by the other DRSs of the subframes that send the PSS and the SSS, to fill the PDSCH, where the time-frequency resources that are not occupied by the other DRS are not occupied by the DRS in the time period occupied by the DRS. Time-frequency resources.
The method of claim 5, wherein the configuring the transmission time period of the DRS comprises:

When the channel occupancy time includes only the transmittable locations of the PSS and the SSS included in the DRS, configuring the PSS and the SSS included in the DRS to be sent at the transmittable location;

The CRS and or the CSI-RS in the DRS occupy the time-frequency position specified by the LTE system, and the other time-frequency resources are filled with the PDSCH.
The method of claim 6, wherein the configuring the transmission time period of the DRS comprises:

When the channel occupancy time includes the transmittable locations of the PSS and the SSS included in the multiple DRSs, the length of the DRS is configured to be greater than 1 ms;

Configuring the PSS and SSS included in the DRS whose length is greater than 1 ms to be sent in the first transmittable location, or,

Configuring the PSS and SSS included in the DRS whose length is greater than 1 ms to be sent at the last transmittable location, or,

If there is a PSS and an SSS transmittable location included in the DRS occupying the subframe 0 or 5, the DRS configured to be longer than 1 ms is configured to be sent at the transmittable location;

The CRS and or the CSI-RS in the DRS occupy the time-frequency position specified by the LTE system, and the other time-frequency resources are filled with the PDSCH.
The method of any of claims 1-8, further comprising:

When the DRS is configured or the PSS/SSS included in the DRS is transmitted on subframes other than subframes 0 and 5, different subframes are indicated in the subframe number by using different SSS sequences or scrambling codes.
The method according to any one of claims 1-8, further comprising: when configuring the DRS or the PSS/SSS included in the DRS is transmitted on subframes other than subframes 0 and 5 Different subframes are indicated by different filling manners of any one or any combination of PSS, SSS, CRS, and CSI-RS.
The method of any of claims 1-8, further comprising:

Transmitting RRC signaling to indicate a time-frequency location occupied by the DRS;

The sending DCI signaling indicates whether there is DRS transmission in the current subframe of the user.
The method according to claim 11, wherein the design of the DRS when the DRS is transmitted together with the PDSCH is different from the design of the DRS when the DRS is separately transmitted, and the DCI is transmitted when the DRS is transmitted in the current subframe. The signaling is further used to indicate a design type of the DRS, the design type includes a DRS separate transmission type, and a DRS and PDSCH simultaneous transmission type.
The method of claim 1 further comprising:

The LBT channel detection of the DRS is performed on the unlicensed spectrum; when the channel occupation time of the PDSCH overlaps with the DMTC time of the DRS, the LBT detection of the DRS is not performed when the DRS is transmitted in the overlapping time.
A transmission method for LTE on an unlicensed spectrum, characterized in that it comprises:

Receiving data transmitted on an unlicensed spectrum, the data including DRS and PDSCH simultaneously transmitted in the same subframe;

Decoding the data;

The DRS and the PDSCH are that the base station side listens to the channel idle on the unlicensed spectrum based on the LBT mechanism for transmitting the PDSCH, and the time of the channel is equal to the DMTC time of the DRS. And the overlapping, and the overlapping time includes one or more DRS transmittable locations, which are simultaneously transmitted on the same subframe in the channel occupation time, where the same subframe includes a DRS transmittable location, and the channel is occupied The time is the channel occupation time for transmitting the PDSCH on the unlicensed spectrum.
The method of claim 14 further comprising:

Receiving an RRC indicating a time-frequency location occupied by the DRS;

Receiving DCI signaling indicating whether there is DRS transmission in the current subframe of the user.
The method according to claim 15, wherein the design of the DRS when the DRS is transmitted together with the PDSCH is different from the design of the DRS when the DRS is separately transmitted, and the DCI is transmitted when the DRS is transmitted in the current subframe. The signaling is further used to indicate a design type of the DRS, the design type includes a DRS separate transmission type, and a DRS and PDSCH simultaneous transmission type.
The method of claim 16 wherein said decoding data comprises:

Determining, according to the indication of the RRC and the DCI, a time-frequency location occupied by the DRS, whether the current subframe has a DRS transmission, and a design type of the DRS when the current subframe has a DRS transmission; and when the current subframe has a DRS transmission According to the design type of the DRS, the data at the time-frequency position occupied by the DRS is not decoded.
A transmission device for LTE on an unlicensed spectrum, comprising:

The first intercepting unit is configured to monitor, according to an LBT mechanism for transmitting the PDSCH, whether a channel on the unlicensed spectrum is idle;

The sending unit is configured to: when the channel is idle, and the DMTC time of the DRS overlaps in the current channel occupation time, and the one or more DRS transmittable locations are included in the overlapping time, during the channel occupation time The DRS and the PDSCH are simultaneously transmitted on the same subframe, and the same subframe includes a DRS transmittable location, where the channel occupation time is a channel occupation time for transmitting the PDSCH on the unlicensed spectrum.
The device of claim 18, further comprising:

The configuration unit is configured to: before the first sending unit simultaneously sends the DRS and the PDSCH, And configuring a transmission time period of the DRS, so that the DRS and the PDSCH are simultaneously transmitted in the same subframe in the channel occupation time.
The device according to claim 18 or 19, further comprising:

The first indication unit is configured to: when configuring the DRS or the PSS and the SSS included in the DRS are sent on subframes other than subframes 0 and 5, use different SSS sequences in the subframe number subframe index or The scrambling code indicates a different subframe.
The device according to claim 18 or 19, further comprising:

a second indication unit, configured to use PSS, SSS, CRS, and CSI-RS padding when configuring the DRS or the PSS and the SSS included in the DRS are sent on subframes other than subframes 0 and 5. Different to indicate different subframes.
The device according to claim 18, wherein the sending unit is further configured to:

Transmitting RRC signaling to indicate a time-frequency location occupied by the DRS;

The sending DCI signaling indicates whether there is DRS transmission in the current subframe of the user.
The device of claim 18, further comprising:

The second intercepting unit is configured to perform LBT channel detection of the DRS on the unlicensed spectrum; when the channel occupancy time of the current PDSCH overlaps with the DMTC time of the DRS, the second intercepting unit sends the DRS in an overlapping time LBT detection of DRS is not performed.
A transmission device for LTE on an unlicensed spectrum, comprising:

The receiving unit is configured to receive data transmitted on an unlicensed spectrum, where the data includes DRS and PDSCH that are simultaneously transmitted in the same subframe;

a decoding unit is configured to decode the data;

The DRS and the PDSCH are that the base station side monitors the channel idle on the unlicensed spectrum based on the LBT mechanism for transmitting the PDSCH, and overlaps with the DMTC time of the DRS in the current channel occupation time, and includes one or When a plurality of DRSs can transmit a location, simultaneously transmitting on the same subframe in the channel occupation time, the same subframe includes a DRS transmittable location, and the letter The channel occupancy time is the channel occupation time for transmitting the PDSCH on the unlicensed spectrum.
The device according to claim 24, wherein the receiving unit is further configured to:

Receiving an RRC indicating a time-frequency location occupied by the DRS;

Receiving DCI signaling indicating whether there is DRS transmission in the current subframe of the user.