CN106656895A - DRS transmission method and device - Google Patents
DRS transmission method and device Download PDFInfo
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- CN106656895A CN106656895A CN201510744741.5A CN201510744741A CN106656895A CN 106656895 A CN106656895 A CN 106656895A CN 201510744741 A CN201510744741 A CN 201510744741A CN 106656895 A CN106656895 A CN 106656895A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The invention provides a DRS transmission method and device. The method comprises: a DRS is multiplexed to a channel region and is transmitted to a terminal at a non-licensed frequency band carrier of a licensed assisted access (LAA) in an LTE system, wherein the channel region at least includes a PDSCH area and a guard interval with the part of OFDM symbol length is preset at an OFDM symbol where the PDSCH area is located before DRS sending. Therefore, a problem that other base stations and carriers lose DRS transmission opportunities because of PDSCH and DRS multiplexing transmission at a certain base station or a certain carrier can be solved.
Description
Technical field
The present invention relates to field of wireless transmission, more particularly, to a kind of method of discovery reference signal DRS transmission
And device.
Background technology
Wireless communication transmissions, such as WLAN technologies can be provided in unauthorized frequency range using various transmission technologys
Deng.The existing technology and equipment for being transmitted using unauthorized frequency range, in order to ensure that distinct device is accessed
The fairness of channel, in the world for the occupation mode of unauthorized frequency range has different regulations to limit.For example,
European Frequency Spectrum regulatory agency requires that equipment possesses LBT (Listen Before Talk, first intercept and transmit afterwards) function,
First detect whether channel is idle before channel is accessed, will so cause the available resources of transmission services cannot
It is guaranteed, so as to cause the quality of service transmitted in unauthorized frequency range to be guaranteed, Consumer's Experience phase
To poor.Using the transmission technology of existing mandate frequency spectrum, the such as biography of LTE standard definition in unlicensed spectrum
Transferring technology, and using the transmission means for authorizing frequency spectrum to aid in unlicensed spectrum, effectively frequency can will be authorized
The reliability of spectrum is combined with the bandwidth resources enriched in unlicensed spectrum, it is ensured that lift system while reliability
Handling capacity.Specifically, in order to ensure performances of the LTE in unauthorized frequency range, current protocol requirement adopts carrier wave
The mode of polymerization uses LTE transmission technology in unauthorized frequency range, and it is main carrier that order authorizes the carrier wave in frequency range,
Make the carrier wave in unauthorized frequency range be subcarrier, realize authorizing the unauthorized frequency range access way of frequency range auxiliary,
That is LAA (Licensed Assisted Access authorize auxiliary to access) mode.
Base station side finds under reference signal DRS and physics in the descending transmission of secondary carrier of the unauthorized carrier waves of LAA
The transmission of row shared channel PDSCH, DRS and PDSCH is required for using LBT modes.PDSCH is passed
The defeated time is longer, and its LBT mode is designed to be needed to meet the requirement that LAA can coexist with WIFI close friend, mesh
Category 4 that front 3GPP is defined with it (being kept out of the way based on exponential) as baseline, this LBT mechanism and
CSMA/CA (Carrier Sense Multiple Access with Collision Detection, the carrier wave of WIFI
Intercept multiple access/conflict avoidance) mode be similar to, belong to the friendly LBT mechanism of comparison, namely compare
It is conservative.
It is long in view of the DRS transmission cycles, and each DRS duration can be shorter, therefore DRS
Can be to be intercepted and busy channel using the more radical LBT modes of the LBT modes than PDSCH, with reality
Existing DRS can have the opportunity to send in each cycle.Such as, the LBT times of DRS can compare PDSCH
The LBT times it is shorter, when base station detect a channel it is idle in a shorter time period after can transmission
DRS。
In existing 3GPP Rel-12 standards, the structure of Rel-12DRS by cell reference as shown in figure 1, believed
Number CRS Port 0, master sync signal PSS, auxiliary synchronous signals SSS and channel state information reference signals
CSI-RS is constituted.
In the standardized discussion of Rel-13 LAA, DRS on the unauthorized carrier waves of LAA design can be with
The DRS of Rel-12 is configured as benchmark to be strengthened;Specifically set currently for the DRS of Rel-13 LAA
Meter does not also determine, but has had following preliminary conclusion:
LBT mechanism is obeyed in the DRS transmission of 1.LAA, but is allowed in a DMTC (DRS measurement
Transmission configuration, DRS measure transmission configuration) the multiple DRS transmission opportunitys of configuration in the cycle;
The DRS of 2.LAA is continuously transmitted in time domain, and whether transmission time length is not yet clear and definite less than 1ms,
DRS transmission times length can further be studied equal to 1ms or more than 1ms;
3. in the DRS subframes of all candidates of DMTC measure the cycles, the beginning OFDM of DRS is sent
(Orthogonal Frequency Division Multiplexing, OFDM) character position keeps one
Cause;
4., except allowing DRS individually to send, also allow DRS to be multiplexed in identical subframe with PDSCH
Transmission, need to further study DRS and PDSCH how multiplexing transmissions.
LBT mainly serves for ensuring different operator (LAA), the interference of different system (WIFI) to be evaded, and standard gauge is scheduled on
In the DRS subframes of all candidates of DMTC measure the cycles, the beginning OFDM symbol of DRS patterns is sent
Position consistency, and allow DRS to be multiplexed the transmission in identical subframe with PDSCH.For above-mentioned preliminary knot
By LAA allows DRS that multiplexing transmission is carried out in identical subframe with PDSCH, then can bring and ask as follows
Topic:
As shown in Fig. 2 being that different base station on the same carrier wave of same operator is unable to showing for simultaneous transmission DRS
It is intended to.Referring to Fig. 2, for the different base station on the same carrier wave of same operator, when certain base station has taken
When channel carries out the multiplexing transmission of DRS and PDSCH, the TXOP (Transmission of PDSCH transmission
Opportunity, send opportunity) sustainable long period (such as TXOP>=4ms), occupy DMTC
The major part in cycle (such as 6ms), other base stations need to send and carry out before DRS (not including PDSCH)
Channel status is busy state during LBT, and the DRS of other base stations is difficult to obtain transmission opportunity.
Additionally, as shown in figure 3, being that adjacent carrier is unable to simultaneous transmission DRS on the same base station of same operator
Schematic diagram.Referring to Fig. 3, for the multiple adjacent carrier wave of the same base station of same operator adjacent frequency leakage is there may be
Problem.When busy channel carries out the multiplexing transmission of DRS and PDSCH on certain carrier wave, PDSCH
TXOP (such as TXOP of sustainable long period of transmission>=4ms), occupy DMTC cycle (examples
Such as 6ms) major part, need to send before DRS (not including PDSCH) on other adjacent carriers of the base station
Carry out being disturbed by adjacent frequency during LBT, channel status is busy state, the DRS on other carrier waves is difficult to obtain
Transmission opportunity.
In sum, when supporting DRS and PDSCH simultaneous transmissions on the unauthorized carrier waves of LAA, exist due to
PDSCH and DRS multiplexing transmissions cause other base stations and carrier wave to lose on some base station or some carrier wave
Go the problem of DRS transmission opportunitys.
The content of the invention
In order to solve because PDSCH and DRS multiplexing transmissions cause on some base station or some carrier wave
Other base stations and carrier wave lose the problem of DRS transmission opportunitys, the invention provides a kind of find reference signal
The method and device of DRS transmission.
In order to solve above-mentioned technical problem, the invention provides a kind of method for finding the transmission of reference signal DRS,
The method includes:
Auxiliary is authorized to access on the unauthorized frequency range carrier wave of LAA in LTE system, by DRS multiplexings in letter
Road is transmitted to terminal in region, wherein, the channel region at least includes Physical Downlink Shared Channel PDSCH
Region, and sending on the orthogonal frequency division multiplex OFDM symbol that the PDSCH region before DRS is located
Pre-set the protection interval of part OFDM symbol length.
Optionally, on the unauthorized frequency range carrier wave for authorizing auxiliary to access LAA in LTE system, will
DRS multiplexings are transmitted to before terminal in channel region, and methods described also includes:The protection interval is set
Position configuration information and the setting protection interval in the OFDM symbol is in the OFDM symbol
On time span, wherein, the protection interval is carried in the position configuration information in the OFDM
Position on symbol.
Optionally, it is described the position configuration information of the protection interval in the OFDM symbol is set with
And arrange after time span of the protection interval in the OFDM symbol, methods described also includes:
The position configuration information is sent to the terminal or position configuration information is preserved to by signaling is preset
In rule, the corresponding OFDM symbol of the protection interval is pointed to according to the position configuration information by terminal
On PDSCH carry out rate-matched, wherein, the position configuration information is carried in the signaling;Pass through
Time span of the signaling by the protection interval in the OFDM symbol is sent to terminal or by the time
Length is preserved into a preset rules, wherein, the protection interval is carried in the signaling in the OFDM
Time span on symbol.
Optionally, in the position configuration information that the protection interval is set in the OFDM symbol,
When sending when starting the first OFDM symbol that character position is subframe of DRS, the protection interval position
In last OFDM symbol in the previous subframe of DRS places subframe.
Optionally, in the position configuration information that the protection interval is set in the OFDM symbol,
When sending when to start character position be not the first OFDM symbol of subframe of DRS, the protection interval
In the previous OFDM symbol of the beginning character position of DRS in the subframe.
Optionally, in the time span that the protection interval is set in the OFDM symbol, when
On a wherein base station in multiple base stations on same unauthorized carrier wave, DRS is multiplexed in channel region
During transmission, the time span of the protection interval is:TL1≤LGAP< TL2, wherein, the LGAPRepresent
The time span of the protection interval, the TL1Represent in LAA the time required to DRS channel-monitorings, institute
State TL2Represent according to LAA first intercept transmit the channel-monitoring of bursty data in LBT mechanism afterwards needed for it is most short
The time value that shortest time needed for the channel-monitoring of time and/or WIFI bursty datas is configured.
Optionally, when on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, DRS is multiplexed
When transmitting in PDSCH region, the time span of the protection interval is:TL3≤LGAP< TL4, wherein,
The LGAPRepresent the time span of the protection interval, the TL3Represent the DRS channels prison in LAA
Listen the transmission of required time and radio-frequency devices and receive between conversion time and value, the TL4Represent basis
Shortest time and/or WIFI needed for the channel-monitoring of bursty data in LBT mechanism are transmitted afterwards in first intercepting for LAA
The time value that shortest time needed for the channel-monitoring of bursty data is configured.
According to another aspect of the present invention, present invention also offers a kind of find what reference signal DRS was transmitted
Method, is applied to terminal, and methods described includes:
Receive on the unauthorized frequency range carrier wave that auxiliary access LAA is authorized in LTE system that base station sends, it is multiple
The DRS transmitted in channel region, wherein, the channel region at least includes Physical Downlink Shared Channel
PDSCH region, and sending the orthogonal frequency division multiplex OFDM that the PDSCH region before DRS is located
The protection interval of part OFDM symbol length is pre-set on symbol.
Optionally, the auxiliary that authorizes in LTE system for sending in the reception base station accesses the unauthorized of LAA
On frequency range carrier wave, before being multiplexed the DRS transmitted in channel region, methods described also includes:Receive base station
The signaling of transmission or from a preset rules obtain base station arrange protection interval in the OFDM symbol
Position configuration information, and the corresponding OFDM symbols of the protection interval are pointed to according to the position configuration information
PDSCH on number carries out rate-matched, wherein, the position is equipped with the signaling and preset rules and is matched somebody with somebody
Confidence ceases, and position of the protection interval in the OFDM symbol is carried in the position configuration information;
Receive the signaling of base station transmission or the protection interval of base station setting is obtained from a preset rules in the OFDM
Time span on symbol, wherein, protection interval is equipped with the signaling and preset rules in the OFDM
Time span on symbol.
Optionally, obtain between the protection that base station is arranged in the signaling for receiving base station transmission or from a preset rules
It is interposed between in the position configuration information in the OFDM symbol, when the beginning character position for sending DRS is one
During the first OFDM symbol of subframe, the protection interval is located in the previous subframe of DRS places subframe
Last OFDM symbol on.
Optionally, obtain between the protection that base station is arranged in the signaling for receiving base station transmission or from a preset rules
It is interposed between in the position configuration information in the OFDM symbol, when the beginning character position for sending DRS is not one
During the first OFDM symbol of individual subframe, the protection interval is located at the beginning sign bit of DRS in the subframe
In the previous OFDM symbol put.
Optionally, obtain between the protection that base station is arranged in the signaling for receiving base station transmission or from a preset rules
It is interposed between in the time span in the OFDM symbol, when in the multiple base stations on same unauthorized carrier wave
On a wherein base station, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:
TL1≤LGAP< TL2, wherein, the LGAPRepresent the time span of the protection interval, the TL1Table
Show in LAA the time required to DRS channel-monitorings, the TL2Expression is transmitted afterwards according to first intercepting for LAA
The channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of bursty data in LBT mechanism
The time value that the required shortest time is configured.
Optionally, obtain between the protection that base station is arranged in the signaling for receiving base station transmission or from a preset rules
It is interposed between in the time span in the OFDM symbol, when its in the multiple unauthorized carrier wave of same base station
In on a carrier wave, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:
TL3≤LGAP< TL4, wherein, the LGAPRepresent the time span of the protection interval, the TL3Table
Show in LAA the time required to DRS channel-monitorings and radio-frequency devices transmission and receive between conversion time
And value, the TL4Represent and first intercept the channel-monitoring that transmits bursty data in LBT mechanism afterwards according to LAA
The time value that shortest time needed for the channel-monitoring of required shortest time and/or WIFI bursty datas is configured.
According to another aspect of the present invention, present invention also offers a kind of find what reference signal DRS was transmitted
Device, is applied to base station, and described device includes:
Transport module, for authorizing auxiliary to access the unauthorized frequency range carrier wave of LAA in LTE system, will
DRS multiplexings are transmitted to terminal in channel region, wherein, the channel region is at least common including physical down
Channel PDSCH region is enjoyed, and is sending the OFDM that the PDSCH region before DRS is located
The protection interval of part OFDM symbol length is pre-set in OFDM symbol.
Optionally, described device also includes setup module, for arranging the protection interval in the OFDM
Time span of the position configuration information and the setting protection interval on symbol in the OFDM symbol,
Wherein, position of the protection interval in the OFDM symbol is carried in the position configuration information.
Optionally, described device also includes processing module, for being sent out the position configuration information by signaling
Deliver to terminal or the position configuration information is preserved into a preset rules, matched somebody with somebody according to the position by terminal
The PDSCH that confidence breath is pointed in the corresponding OFDM symbol of the protection interval carries out rate-matched, its
In, the position configuration information is carried in the signaling;By signaling by the protection interval described
Time span in OFDM symbol sends and is preserved into a preset rules to terminal or by the time span,
Wherein, time span of the protection interval in the OFDM symbol is carried in the signaling.
Optionally, in the setup module, as the head that the beginning character position for sending DRS is a subframe
During individual OFDM symbol, the protection interval is located at last in the previous subframe of DRS places subframe
In individual OFDM symbol.
Optionally, in the setup module, when the character position that starts for sending DRS is not a subframe
During first OFDM symbol, the protection interval is located at the previous of the beginning character position of DRS in the subframe
In individual OFDM symbol.
Optionally, in the setup module, when in the multiple base stations on same unauthorized carrier wave wherein
On one base station, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:TL1
≤LGAP< TL2, wherein, the LGAPRepresent the time span of the protection interval, the TL1Represent
In LAA the time required to DRS channel-monitorings, the TL2Expression transmit afterwards LBT according to first intercepting for LAA
In mechanism needed for the channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of bursty data
The time value that shortest time is configured.
Optionally, in the setup module, as wherein in the multiple unauthorized carrier wave of same base station
On carrier wave, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:TL3≤
LGAP< TL4, wherein, the LGAPRepresent the time span of the protection interval, the TL3Represent in LAA
Between the transmission of middle DRS channel-monitorings required time and radio-frequency devices and reception conversion time and value, it is described
TL4Represent according to LAA first intercept transmit the channel-monitoring of bursty data in LBT mechanism afterwards needed for most in short-term
Between and/or the time value that is configured of shortest time needed for the channel-monitoring of WIFI bursty datas.
According to another aspect of the present invention, present invention also offers a kind of find what reference signal DRS was transmitted
Device, is applied to terminal, and described device includes:
First receiver module, the auxiliary that authorizes in LTE system for receiving base station transmission accesses the non-of LAA
Authorize on frequency range carrier wave, be multiplexed the DRS transmitted in channel region, wherein, the channel region is at least wrapped
Physical Downlink Shared Channel PDSCH region is included, and is sending what the PDSCH region before DRS was located
The protection interval of part OFDM symbol length is pre-set on orthogonal frequency division multiplex OFDM symbol.
Optionally, described device also includes the second receiver module and the 3rd receiver module, and described second receives mould
Block is used to receive the signaling of base station transmission or the protection interval of base station setting is obtained from a preset rules described
Position configuration information in OFDM symbol, and the protection interval is pointed to according to the position configuration information
PDSCH in corresponding OFDM symbol carries out rate-matched, wherein, in the signaling and preset rules
The position configuration information is equipped with, the protection interval is carried in the position configuration information described
Position in OFDM symbol;3rd receiver module is used to receive the signaling of base station transmission or default from
Time span of the protection interval of base station setting in the OFDM symbol is obtained in rule, wherein, it is described
Time span of the protection interval in the OFDM symbol is equipped with signaling and preset rules.
Optionally, in second receiver module, when the beginning character position for sending DRS is a subframe
First OFDM symbol when, the protection interval be located at DRS places subframe previous subframe on most
In latter OFDM symbol.
Optionally, in second receiver module, when the beginning character position for sending DRS is not a son
During the first OFDM symbol of frame, the protection interval is located at the beginning character position of DRS in the subframe
In previous OFDM symbol.
Optionally, in the 3rd receiver module, when in the multiple base stations on same unauthorized carrier wave
On a wherein base station, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:
TL1≤LGAP< TL2, wherein, the LGAPRepresent the time span of the protection interval, the TL1Table
Show in LAA the time required to DRS channel-monitorings, the TL2Expression is transmitted afterwards according to first intercepting for LAA
The channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of bursty data in LBT mechanism
The time value that the required shortest time is configured.
Optionally, in the 3rd receiver module, when its in the multiple unauthorized carrier wave of same base station
In on a carrier wave, when DRS multiplexings are transmitted in channel region, the time span of the protection interval is:
TL3≤LGAP< TL4, wherein, the LGAPRepresent the time span of the protection interval, the TL3Table
Show in LAA the time required to DRS channel-monitorings and radio-frequency devices transmission and receive between conversion time
And value, the TL4Represent and first intercept the channel-monitoring that transmits bursty data in LBT mechanism afterwards according to LAA
The time value that shortest time needed for the channel-monitoring of required shortest time and/or WIFI bursty datas is configured.
The invention has the beneficial effects as follows:
The present invention is directed to the unauthorized frequency range carrier waves of LAA, when DRS multiplexings are transmitted in channel region, and believes
When road region at least includes PDSCH region, the OFDM that the PDSCH region before DRS is located is being sent
The protection interval of part OFDM symbol length is pre-set on symbol.The present invention is by before DRS is sent
The OFDM symbol that is located of PDSCH region on pre-set the protection interval of part OFDM symbol length,
And due to the uniformity of the beginning OFDM symbol position of transmission DRS on the unauthorized carrier waves of LAA so that LAA
In unauthorized frequency range during PDSCH and DRS simultaneous transmissions, the different adjacent base stations of same carrier wave in LAA,
Or the DRS on the different adjacent carriers of same base station can carry out quick LBT processes in the protection interval
And realize quickly intercepting, so as to the channel for accessing unauthorized frequency range carries out DRS transmission.Additionally, same in LAA
On one unauthorized carrier wave on the multiple adjacent unauthorized carrier wave of the DRS of multiple adjacent base stations or same base station
DRS can obtain under LBT mechanism justice transmission opportunity, solve due to a certain base station or a certain
Other base stations and carrier wave lose DRS transmission opportunitys caused by PDSCH and DRS multiplexing transmissions on individual carrier wave
Problem.
Description of the drawings
Fig. 1 represents the structure chart of DRS in existing 3GPP Rel-12 standards;
Fig. 2 represents that the different base station on the same carrier wave of same operator is unable to the schematic diagram of simultaneous transmission DRS;
Fig. 3 represents that carrier wave adjacent on the same base station of same operator is unable to the schematic diagram of simultaneous transmission DRS;
Fig. 4 is represented in embodiments of the invention and is being sent the OFDM that the PDSCH region before DRS is located
The schematic diagram of the protection interval of part OFDM symbol length is pre-set on symbol;
Fig. 5 represents the flow chart of the method for the DRS transmission that base station is applied in the second embodiment of the present invention;
Fig. 6 represents that protection interval is located in the previous subframe of DRS places subframe most in embodiments of the invention
Schematic diagram in latter OFDM symbol;
Fig. 7 represents that protection interval is located at before the beginning character position of DRS in subframe in embodiments of the invention
Schematic diagram in one OFDM symbol;
Fig. 8 represents the flow chart of the method for the DRS transmission that terminal is applied in the fourth embodiment of the present invention;
Fig. 9 represents the structural representation of the device of the DRS transmission that base station is applied in the fifth embodiment of the present invention
Figure;And
Figure 10 represents that the structure of the device of the DRS transmission that terminal is applied in the sixth embodiment of the present invention is shown
It is intended to.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing in accompanying drawing
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should not be by
Embodiments set forth here is limited.On the contrary, there is provided these embodiments are able to be best understood from this
It is open, and can by the scope of the present disclosure it is complete convey to those skilled in the art.
First embodiment
In the present embodiment, the mandate auxiliary in LTE system is accessed on the unauthorized frequency range carrier wave of LAA,
DRS multiplexings are transmitted to terminal in channel region, wherein, channel region is at least shared including physical down
Channel PDSCH region, and sending the OFDM that the PDSCH region before DRS is located
The protection interval of part OFDM symbol length is pre-set in OFDM symbol.
Specifically, PDSCH region can be the data area that PDSCH is carried, and can also be in PDSCH
The upper region filled with occupy-place signal, here is simultaneously not specifically limited.Additionally, channel region can also include
Physical downlink control channel PDCCH region or enhancement mode Physical Downlink Control Channel EPDCCH regions, i.e.,
Mandate auxiliary in LTE system is accessed on the unauthorized frequency range carrier wave of LAA, and DRS multiplexings can be existed
Transmit to terminal in the region of PDSCH and PDCCH compositions, or by DRS multiplexings in PDSCH and
Transmit to terminal in the region of EPDCCH compositions.
In addition, it is specific, as shown in figure 4, being to send the OFDM that the PDSCH region before DRS is located
The schematic diagram of the protection interval of part OFDM symbol length is pre-set on symbol.Referring to Fig. 4, when by DRS
Multiplexing is in PDSCH region when transmitting, measure in DRS transmission configuration DMTC measurement window it is all
Before the DRS of the DRS transmission opportunitys of LAA sends, in the OFDM symbol that PDSCH region is located
Pre-set the protection interval of part OFDM symbol length.The setting of the protection interval can cause LAA
DRS carry out quickly first intercepting and transmit LBT processes afterwards and realize quickly intercepting, so as to access unauthorized frequency range
Channel carry out DRS transmission.
The present embodiment in the OFDM symbol for sending the place of the PDSCH region before DRS by setting in advance
The protection interval of part OFDM symbol length is put, and due to sending opening for DRS on the unauthorized carrier waves of LAA
The uniformity of beginning OFDM symbol position so that PDSCH and DRS is passed simultaneously in the unauthorized frequency ranges of LAA
When defeated, the different adjacent base stations of same carrier wave in LAA, or the DRS on the different adjacent carriers of same base station
Quick LBT processes can be carried out in the protection interval and realization is quickly intercepted, so as to access unauthorized frequency range
Channel carry out DRS transmission.Additionally, in LAA on same unauthorized carrier wave multiple adjacent base stations DRS
Or the DRS on the multiple adjacent unauthorized carrier wave of same base station can obtain justice under LBT mechanism
Transmission opportunity, solves due to PDSCH the and DRS multiplexing transmissions on a certain base station or some carrier wave
Caused other base stations and carrier wave lose the problem of DRS transmission opportunitys.
Second embodiment
As shown in figure 5, the stream of the method for the DRS transmission to be applied to base station in the second embodiment of the present invention
Cheng Tu, the embodiment comprises the steps:
Step 101, arranges protection interval position configuration information on the ofdm symbols and arranges between protection
Every time span on the ofdm symbols.
In this step, base station, can when protection interval position configuration information on the ofdm symbols is arranged
To start whether character position is the first OFDM symbol of a subframe as basis for estimation according to send DRS
Protection interval position on the ofdm symbols is configured, specifically, is carried in the configuration information of position
Protection interval position on the ofdm symbols.
Specifically, when when starting the first OFDM symbol that character position is subframe of DRS is sent, protect
Shield interval can be arranged in last OFDM symbol in the previous subframe of DRS places subframe.
It should be noted that here specifically limits the concrete structure of DRS, i.e. the structure of DRS can be here
The DRS structures in 3GPP Rel-12 standards in Fig. 1, or the structure of other forms.In this measure
Example is illustrated to the position of protection interval.As shown in fig. 6, being located at DRS places subframe for protection interval
The schematic diagram in last OFDM symbol in previous subframe, referring to Fig. 6, it can be seen that (n+1)th
DRS is sent on subframe starts the first OFDM symbol that character position is a subframe, before the subframe
One subframe is to be provided with protection interval in last OFDM symbol of n-th subframe.Optionally, protect
The setting at shield interval can be realized by occupy-place signal.From fig. 6 it can be seen that in figure 6 n-th
It is that a protection interval is set in last OFDM symbol in the OFDM symbol of the serial number 13 of subframe,
And there are occupy-place signal in the OFDM symbol.
When sending when to start character position be not the first OFDM symbol of subframe of DRS, protection interval
Can be arranged in the previous OFDM symbol of beginning character position of DRS in subframe.Here needs explanation
, it can be the 3GPP in Fig. 1 that here does not specifically limit the concrete structure of DRS, the i.e. structure of DRS
DRS structures in Rel-12 standards, or the structure of other forms.Here is illustrated to protection interval
Position illustrates.As shown in fig. 7, the beginning character position of the DRS in subframe is located at for protection interval
Schematic diagram in previous OFDM symbol, referring to Fig. 7, on the (n+1)th subframe, serial number 2 and sequence number
Not have DRS in 3 OFDM symbol, and there is DRS in the 4th~7 of the subframe the OFDM symbol,
I.e. send DRS start character position be located at the subframe on serial number 4 OFDM symbol on, now in order to
Ensure the reliability that DRS is transmitted in LBT mechanism, can arrange in the OFDM symbol of serial number 3
Protection interval, likewise, the setting of protection interval can be realized by occupy-place signal.Can from Fig. 7
Go out, a protection interval is set in the OFDM symbol of serial number 3 in the figure 7, and in the OFDM symbol
On there are occupy-place signal.
Additionally, this step also sets up protection interval time span on the ofdm symbols.In order to improve LAA
The reliability of middle DRS transmission, when protection interval time span on the ofdm symbols is arranged, between protection
Every time span to ensure that the DRS in LAA can listen to channel idle during LBT, and
WIFI and different operator can be avoided to seize channel.According to the principle, protection interval can under different scenes
To arrange different time spans.Specifically, the time span of protection interval is as follows:
When on the wherein base station in the multiple base stations on same unauthorized carrier wave, by DRS multiplexings in channel
When transmitting in region, the time span of protection interval is:TL1≤LGAP< TL2, wherein, LGAPRepresent and protect
Shield interlude length, TL1Represent in LAA the time required to DRS channel-monitorings, TL2Represent root
According to LAA first intercept transmit afterwards in LBT mechanism the shortest time needed for the channel-monitoring of bursty data and/or
The time value that shortest time needed for the channel-monitoring of WIFI bursty datas is configured.Specifically, TL2Can be
Shortest time, the channel of WIFI bursty datas needed for the channel-monitoring of bursty data in the LBT mechanism of LAA
Shortest time needed for the channel-monitoring of bursty data in the LBT mechanism of shortest time and LAA needed for monitoring
And the one kind in the minimum of a value needed for the channel-monitoring of WIFI bursty datas between the shortest time.Preferably, TL2
Could be arranged to shortest time needed for the channel-monitoring of bursty data and WIFI in the LBT mechanism of LAA to happen suddenly
Minimum of a value needed for the channel-monitoring of data between the shortest time.This time length is made explanations below.
When adjacent base station does not send PDSCH, DRS carries out quick channel sense before sending, and protects
Interlude length is more than or equal to the DRS channel-monitorings required time in LAA (such as during a CAA
Gap is at intervals of 9us), the DRS in the LAA of other base stations for enabling to same operator is during LBT
Intercept successfully and be successfully transmitted.Additionally, the time span of protection interval is less than the LBT mechanism according to LAA
Shortest time needed for the channel-monitoring of middle bursty data (such as 34us) and/or the channel of WIFI bursty datas
The time value that is configured of shortest time (such as 34us) needed for monitoring, with avoid the LAA of different operator with
And the WIFI of different operator seizes channel.
When on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, by DRS multiplexings in channel region
When transmitting in domain, the time span of protection interval is:TL3≤LGAP< TL4, wherein, LGAPRepresent protection
Interlude length, TL3Represent in LAA the time required to DRS channel-monitorings and radio-frequency devices send out
Send and receive between conversion time and value, TL4Expression transmit afterwards LBT mechanism according to first intercepting for LAA
It is most short needed for the channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of middle bursty data
The time value that time is configured.Specifically, TL4Can be the letter of bursty data in the LBT mechanism of LAA
Monitor required shortest time, the LBT of shortest time and LAA needed for the channel-monitoring of WIFI bursty datas in road
It is most short needed for the channel-monitoring of shortest time and WIFI bursty datas needed for the channel-monitoring of bursty data in mechanism
One kind in minimum of a value between time.Preferably, TL2Could be arranged to be happened suddenly in the LBT mechanism of LAA
Needed for the channel-monitoring of shortest time and WIFI bursty datas needed for the channel-monitoring of data between the shortest time
Minimum of a value.This time length is made explanations below.
Adjacent carrier does not send PDSCH, carries out Fast Channel before transmission DRS and intercepts, and is penetrated due to a set of
Frequency wave filter can not simultaneously be received and sent, therefore when same base station attempts to do the fast of DRS in adjacent carrier
Before speed is intercepted, radio-frequency devices need the conversion for once being sent with being received, therefore the time of protection interval
The time required to DRS channel-monitorings of the length more than or equal to LAA (such as one CAA slot time is 9us)
And the transmission and reception conversion time (such as 17us) of radio-frequency devices between and value.While the protection interval
Time span the DRS of the LAA of other carrier waves is intercepted in LBT mechanism successfully and is successfully sent out
Send.Additionally, the time span of protection interval is less than the channel according to bursty data in the LBT mechanism of LAA
Shortest time (such as 34us) and/or shortest time needed for the channel-monitoring of WIFI bursty datas needed for monitoring
The time value that (such as 34us) is configured, to avoid the LAA of the different operator and WIFI of different operator
Seize channel.
Step 102, position configuration information is sent preserved to one to terminal or by position configuration information by signaling
In preset rules.
In this step, after position configuration information sets, can be by way of transmission signaling by position
Configuration information sends and is preserved into a preset rules, by terminal according to position to terminal or by position configuration information
The PDSCH that configuration information is pointed in the corresponding OFDM symbol of protection interval carries out rate-matched, wherein,
Position configuration information is carried in signaling.
Specifically, preset rules can be an agreement, and position configuration information is saved directly in agreement, eventually
End directly obtains the position configuration information from agreement.Additionally, the preset rules can also match somebody with somebody for DRS measurements
Confidence cease, will position configuration information directly preserve into existing DRS measurement configuration informations, by terminal from
Position configuration information is obtained in the DRS measurement configuration informations for getting.Here it should be noted that here simultaneously
Concrete restriction is not made to the concrete form of preset rules.
Step 103, sent to terminal by time span of the signaling by protection interval on the ofdm symbols or
Time span is preserved into a preset rules.
In this step, specifically, after the time span in protection interval on the ofdm symbols sets,
Can sending signaling by way of time span by protection interval on the ofdm symbols send to terminal or
Time span is preserved into a preset rules, wherein, protection interval is carried in signaling in OFDM symbol
On time span.
Specifically, preset rules can be an agreement, protection interval time span on the ofdm symbols
Can be saved directly in agreement, terminal directly obtains the time span from agreement.Additionally, the default rule
Then can also be DRS measurement configuration informations, will time span directly preserve to existing DRS measurement configure
In information, the time span is obtained from the DRS measurement configuration informations for getting by terminal.Here needs
Bright, here does not make concrete restriction to the concrete form of preset rules.
Step 104, authorizes auxiliary to access on the unauthorized frequency range carrier wave of LAA, by DRS in LTE system
Multiplexing is transmitted to terminal in channel region.
In this step, specifically, PDSCH region can be the data area that PDSCH is carried, and may be used also
Think the region filled with occupy-place signal on PDSCH, here is simultaneously not specifically limited.Additionally, channel region
Domain can also include physical downlink control channel PDCCH region or enhancement mode Physical Downlink Control Channel
EPDCCH regions, i.e., the mandate auxiliary in LTE system is accessed on the unauthorized frequency range carrier wave of LAA,
DRS can be multiplexed and be transmitted to terminal in the region that PDSCH and PDCCH are constituted, or by DRS
It is multiplexed and is transmitted to terminal in the region that PDSCH and EPDCCH is constituted.
In addition, in this step, the OFDM that the PDSCH region before DRS is located is being sent
The protection interval of part OFDM symbol length is pre-set in OFDM symbol.Due to send DRS it
Pre-set in the OFDM symbol that front PDSCH region is located between the protection of part OFDM symbol length
Every, therefore when transmitting in the PDSCH region by DRS multiplexings in channel region, the DRS of LAA
LBT process realizations can quickly be carried out quickly to intercept, so as to the channel for accessing unauthorized frequency range is transmitted.
The present embodiment by DRS multiplexing transmit in channel region when, by send DRS before
The protection interval of part OFDM symbol length is pre-set in the OFDM symbol that PDSCH region is located,
And by arranging the time span of protection interval position configuration information on the ofdm symbols and protection interval,
So that the DRS of LAA is intercepted successfully during LBT and is successfully transmitted so that on same unauthorized carrier wave
The DRS of multiple adjacent base stations has fair transmission opportunity, and causes the multiple adjacent unauthorized of same base station
When there is carrier-in-interference on carrier wave, the DRS on multiple unauthorized carrier waves has fair transmission opportunity, it is to avoid
Due to other base stations caused by PDSCH the and DRS multiplexing transmissions on some base station or some carrier wave
With the problem that carrier wave loses DRS transmission opportunitys.
3rd embodiment
In the present embodiment, terminal receives authorizing in LTE system for base station transmission and aids in accessing the non-of LAA
Authorize on frequency range carrier wave, be multiplexed the DRS transmitted in channel region, wherein, channel region at least includes thing
Reason DSCH Downlink Shared Channel PDSCH region, and sending the orthogonal of the place of the PDSCH region before DRS
The protection interval of part OFDM symbol length is pre-set on frequency division multiplex OFDM symbol.
Specifically, PDSCH region can be the data area that PDSCH is carried, and can also be in PDSCH
The upper region filled with occupy-place signal, here is simultaneously not specifically limited.Additionally, channel region can also include
Physical downlink control channel PDCCH region or enhancement mode Physical Downlink Control Channel EPDCCH regions, i.e.,
Terminal can also receive the auxiliary that authorizes in LTE system of base station transmission and access the unauthorized frequency range carrier wave of LAA
On, the DRS transmitted in the region that PDSCH and PDCCH is constituted, or multiplexing are multiplexed in PDSCH
With the DRS transmitted in the region of EPDCCH compositions.
In addition, it is specific, as shown in figure 4, being to send the OFDM that the PDSCH region before DRS is located
The schematic diagram of the protection interval of part OFDM symbol length is pre-set on symbol.Referring to Fig. 4, when by DRS
Multiplexing is in PDSCH region when transmitting, measure in DRS transmission configuration DMTC measurement window it is all
Before the DRS of the DRS transmission opportunitys of LAA sends, in the OFDM symbol that PDSCH region is located
Pre-set the protection interval of part OFDM symbol length.The setting of the protection interval can cause LAA
DRS carry out in the protection interval during quick LBT and realize quickly intercepting, it is unauthorized so as to access
The channel of frequency range is transmitted.
Terminal in the present embodiment receives the unauthorized frequency range carrier wave that LAA is accessed in mandate auxiliary that base station sends
On, it is multiplexed the DRS on channel region, it is ensured that the integrality of PDSCH and DRS multiplexing transmissions.
Fourth embodiment
As shown in figure 8, the flow chart that the DRS to be applied to terminal in fourth embodiment is transmitted, the embodiment
Comprise the steps:
Step 201, receives the base station signaling for sending or the protection interval that base station setting is obtained from a preset rules
Position configuration information on the ofdm symbols, and it is corresponding to be pointed to protection interval according to position configuration information
PDSCH in OFDM symbol carries out rate-matched.
In this step, position configuration information is equipped with signaling and preset rules, is taken in the configuration information of position
With protection interval position on the ofdm symbols.Terminal can be by way of reception signaling or pre- from one
If obtaining the position configuration information in rule, and after the position configuration information is got, configured according to position
The PDSCH that information is pointed in the corresponding OFDM symbol of protection interval carries out rate-matched.
Specifically, the PDSCH that terminal-pair is located in the corresponding OFDM symbol of protection interval carries out speed
Do not do at demodulation coding with the PDSCH that can be located in the corresponding OFDM symbol of protection interval for terminal-pair
Reason.
Additionally, preset rules can be an agreement, position configuration information is saved directly in agreement, terminal
Directly the position configuration information is obtained from agreement.Additionally, the preset rules can also be DRS measurement configurations
Information, will position configuration information directly preserve into existing DRS measurement configuration informations, by terminal from obtaining
Position configuration information is obtained in the DRS measurement configuration informations got.Here it should be noted that here not
Concrete restriction is made to the concrete form of preset rules.
In addition, specific, in the position configuration information that terminal gets, protection interval is in OFDM symbol
On position it is as follows:
When starting the first OFDM symbol that character position is subframe of DRS is sent, protection interval can
To be arranged in last OFDM symbol in the previous subframe of DRS places subframe.Here needs
Illustrate, here does not specifically limit the concrete structure of DRS, the i.e. structure of DRS can be in Fig. 1
DRS structures in 3GPP Rel-12 standards, or the structure of other forms.Here citing is to protection
The position at interval illustrates.As shown in fig. 6, the previous subframe for being located at DRS places subframe for protection interval
On last OFDM symbol on schematic diagram, referring to Fig. 6, it can be seen that on (n+1)th subframe send out
That send DRS starts the first OFDM symbol that character position is a subframe, in the previous subframe of the subframe
Protection interval is provided with last OFDM symbol of i.e. n-th subframe.Optionally, protection interval
Setting can be realized by occupy-place signal.From fig. 6 it can be seen that the sequence of n-th subframe in figure 6
Number to arrange a protection interval in last OFDM symbol in 13 OFDM symbol, and at this
Occupy-place signal is there are in OFDM symbol.
When sending when to start character position be not the first OFDM symbol of subframe of DRS, protection interval
Can be arranged in the previous OFDM symbol of beginning character position of DRS in subframe.Here needs explanation
, it can be the 3GPP in Fig. 1 that here does not specifically limit the concrete structure of DRS, the i.e. structure of DRS
DRS structures in Rel-12 standards, or the structure of other forms.Here is illustrated to protection interval
Position illustrates.As shown in fig. 7, the beginning character position of the DRS in subframe is located at for protection interval
Schematic diagram in previous OFDM symbol, referring to Fig. 7, on the (n+1)th subframe, serial number 2 and sequence number
Not have DRS in 3 OFDM symbol, and there is DRS in the 4th~7 of the subframe the OFDM symbol,
I.e. send DRS start character position be located at the subframe on serial number 4 OFDM symbol on, now in order to
Ensure the reliability that DRS is transmitted in LBT mechanism, can arrange in the OFDM symbol of serial number 3
Protection interval, likewise, the setting of protection interval can be realized by occupy-place signal.Can from Fig. 7
Go out, a protection interval is set in the OFDM symbol of serial number 3 in the figure 7, and in the OFDM symbol
On there are occupy-place signal.
Step 202, receives the base station signaling for sending or the protection interval that base station setting is obtained from a preset rules
Time span on the ofdm symbols.
In this step, protection interval is carried in signaling and preset rules in the OFDM symbol
Time span, terminal can obtain base by way of receiving the signaling of base station transmission or from a preset rules
The protection interval for arranging of standing time span on the ofdm symbols.
Specifically, preset rules can be an agreement, protection interval time span on the ofdm symbols
Can be saved directly in agreement, terminal directly obtains the time span from agreement.Additionally, the default rule
Then can also be DRS measurement configuration informations, will time span directly preserve to existing DRS measurement configure
In information, the time span is obtained from the DRS measurement configuration informations for getting by terminal.Here needs
Bright, here does not make concrete restriction to the concrete form of preset rules.
Additionally, specific, the time span of protection interval is as follows:
When on the wherein base station in the multiple base stations on same unauthorized carrier wave, by DRS multiplexings in channel
When transmitting in region, the time span of protection interval is:TL1≤LGAP< TL2, wherein, LGAPRepresent and protect
Shield interlude length, TL1Represent in LAA the time required to DRS channel-monitorings, TL2Represent root
According to LAA first intercept transmit afterwards in LBT mechanism the shortest time needed for the channel-monitoring of bursty data and/or
The time value that shortest time needed for the channel-monitoring of WIFI bursty datas is configured.Specifically, TL2Can be
Shortest time, the channel of WIFI bursty datas needed for the channel-monitoring of bursty data in the LBT mechanism of LAA
Shortest time needed for the channel-monitoring of bursty data in the LBT mechanism of shortest time and LAA needed for monitoring
And the one kind in the minimum of a value needed for the channel-monitoring of WIFI bursty datas between the shortest time.Preferably, TL2
Could be arranged to shortest time needed for the channel-monitoring of bursty data and WIFI in the LBT mechanism of LAA to happen suddenly
Minimum of a value needed for the channel-monitoring of data between the shortest time.This time length is made explanations below.
When adjacent base station does not send PDSCH, DRS carries out quick channel sense before sending, and protects
Interlude length is more than or equal to the DRS channel-monitorings required time in LAA (such as during a CAA
Gap is at intervals of 9us), the DRS in the LAA of other base stations for enabling to same operator is during LBT
Intercept successfully and send DRS.Additionally, the time span of protection interval is less than the LBT mechanism according to LAA
Shortest time needed for the channel-monitoring of middle bursty data (such as 34us) and/or the channel of WIFI bursty datas
The time value that is configured of shortest time (such as 34us) needed for monitoring, with avoid the LAA of different operator with
And the WIFI of different operator seizes channel.
When on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, by DRS multiplexings in channel region
When transmitting in domain, the time span of protection interval is:TL3≤LGAP< TL4, wherein, LGAPRepresent protection
Interlude length, TL3Represent in LAA the time required to DRS channel-monitorings and radio-frequency devices send out
Send and receive between conversion time and value, TL4Expression transmit afterwards LBT mechanism according to first intercepting for LAA
It is most short needed for the channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of middle bursty data
The time value that time is configured.Specifically, TL4Can be the letter of bursty data in the LBT mechanism of LAA
Monitor required shortest time, the LBT of shortest time and LAA needed for the channel-monitoring of WIFI bursty datas in road
It is most short needed for the channel-monitoring of shortest time and WIFI bursty datas needed for the channel-monitoring of bursty data in mechanism
One kind in minimum of a value between time.Preferably, TL2Could be arranged to be happened suddenly in the LBT mechanism of LAA
Needed for the channel-monitoring of shortest time and WIFI bursty datas needed for the channel-monitoring of data between the shortest time
Minimum of a value.This time length is made explanations below.
Adjacent carrier does not send PDSCH, sending when carry out Fast Channel before DRS and intercepting, due to a set of
Radio-frequency filter can not simultaneously be received and sent, therefore when same base station attempts to do DRS's in adjacent carrier
Before quickly intercepting, radio-frequency devices need once sent and receive conversion, therefore protection interval when
Between the time required to DRS channel-monitorings of the length more than or equal to LAA (such as one CAA slot times be 9us)
And the transmission and reception conversion time (such as 17us) of radio-frequency devices between and value.While the protection interval
Time span the DRS of the LAA of other carrier waves is intercepted in LBT mechanism successfully and is successfully sent out
Send.Additionally, the time span of protection interval is less than the channel according to bursty data in the LBT mechanism of LAA
Shortest time (such as 34us) and/or shortest time needed for the channel-monitoring of WIFI bursty datas needed for monitoring
The time value that (such as 34us) is configured, to avoid the LAA of the different operator and WIFI of different operator
Seize channel.
Step 203, receives the unauthorized frequency range of mandate auxiliary access LAA in LTE system that base station sends
On carrier wave, the DRS transmitted in channel region is multiplexed.
In this step, specifically, channel region at least includes Physical Downlink Shared Channel PDSCH region,
And set in advance on the orthogonal frequency division multiplex OFDM symbol that the PDSCH region before DRS is located sending
Put the protection interval of part OFDM symbol length.
Additionally, specific, PDSCH region can be the data area that PDSCH is carried, can also be
Region filled with occupy-place signal on PDSCH, here is simultaneously not specifically limited.Additionally, channel region may be used also
With including physical downlink control channel PDCCH region or enhancement mode Physical Downlink Control Channel EPDCCH areas
Domain, i.e. terminal can also receive the auxiliary that authorizes in LTE system of base station transmission and access the unauthorized frequency of LAA
On Duan Zaibo, the DRS transmitted in the region that PDSCH and PDCCH is constituted is multiplexed, or multiplexing exists
The DRS transmitted in the region of PDSCH and EPDCCH compositions.
Terminal in the present embodiment is by receiving protection interval position configuration information on the ofdm symbols and guarantor
Shield interlude length so that terminal can receive base station transmission on the unauthorized frequency range carrier wave of LAA,
The DRS that multiplexing is transmitted in channel region, it is ensured that the integrality and DRS of PDSCH and DRS multiplexing transmissions
The reliability of transmission.
5th embodiment
As shown in figure 9, discovery reference signal DRS to be applied to base station in the fifth embodiment of the present invention is passed
The structural representation of defeated device, the device includes:
Transport module 301, for authorizing auxiliary to access the unauthorized frequency range carrier wave of LAA in LTE system,
To transmit to terminal in DRS multipling channels region, wherein, the channel region is at least common including physical down
Channel PDSCH region is enjoyed, and is sending the OFDM that the PDSCH region before DRS is located
The protection interval of part OFDM symbol length is pre-set in OFDM symbol.
Optionally, device also includes setup module 302, for arranging protection interval on the ofdm symbols
Position configuration information and setting protection interval time span on the ofdm symbols, wherein, position configuration
Protection interval position on the ofdm symbols is carried in information.
Optionally, device also includes processing module 303, for position configuration information being sent to end by signaling
End preserves position configuration information into a preset rules, is pointed to protect according to position configuration information by terminal
PDSCH in the corresponding OFDM symbol in shield interval carries out rate-matched, wherein, position is carried in signaling
Put configuration information;Send to terminal or incite somebody to action by time span of the signaling by protection interval on the ofdm symbols
Time span is preserved into a preset rules, wherein, protection interval is carried in signaling on the ofdm symbols
Time span.
Optionally, in setup module 302, as the head that the beginning character position for sending DRS is a subframe
During individual OFDM symbol, protection interval is located at last OFDM in the previous subframe of DRS places subframe
On symbol.
Optionally, in setup module 302, when the character position that starts for sending DRS is not a subframe
During first OFDM symbol, protection interval is located at the previous OFDM of the beginning character position of DRS in subframe
On symbol.
Optionally, in setup module 302, when in the multiple base stations on same unauthorized carrier wave wherein
On one base station, when DRS multiplexings are transmitted in channel region, the time span of protection interval is:TL1≤
LGAP< TL2, wherein, LGAPRepresent the time span of protection interval, TL1Represent the DRS channels in LAA
The time required to monitoring, TL2Represent and first intercept the channel that transmits bursty data in LBT mechanism afterwards according to LAA
Shortest time needed for the channel-monitoring of shortest time and/or WIFI bursty datas needed for monitoring be configured when
Between be worth.
Optionally, in setup module 302, as wherein in the multiple unauthorized carrier wave of same base station
On carrier wave, when DRS multiplexings are transmitted in channel region, the time span of protection interval is:TL3≤LGAP
< TL4, wherein, LGAPRepresent the time span of protection interval, TL3Represent the DRS channel-monitorings in LAA
Between the transmission of required time and radio-frequency devices and reception conversion time and value, TL4Represent according to LAA's
First intercept and transmit shortest time needed for the channel-monitoring of bursty data and/or WIFI burst numbers in LBT mechanism afterwards
According to channel-monitoring needed for the time value that is configured of shortest time.
Sixth embodiment
As shown in Figure 10, it is discovery parameter signal DRS that terminal is applied in the sixth embodiment of the present invention
The structural representation of the device of transmission, the device includes:
First receiver module 401, the auxiliary that authorizes in LTE system for receiving base station transmission accesses LAA
Unauthorized frequency range carrier wave on, be multiplexed in channel region transmit DRS, wherein, the channel region is extremely
Include Physical Downlink Shared Channel PDSCH region less, and send the PDSCH region institute before DRS
Orthogonal frequency division multiplex OFDM symbol on pre-set the protection interval of part OFDM symbol length.
Optionally, device also includes the second receiver module 402 and the 3rd receiver module 403, the second receiver module
402 protection intervals for being used to receive the signaling of base station transmission or acquisition base station is arranged from a preset rules exist
Position configuration information in OFDM symbol, and it is corresponding to be pointed to protection interval according to position configuration information
PDSCH in OFDM symbol carries out rate-matched, wherein, it is equipped with position in signaling and preset rules and matches somebody with somebody
Confidence ceases, and protection interval position on the ofdm symbols is carried in the configuration information of position;3rd receives mould
The protection interval that block 403 is used to receive the signaling of base station transmission or acquisition base station is arranged from a preset rules exists
Time span in OFDM symbol, wherein, protection interval is equipped with signaling and preset rules in OFDM
Time span on symbol.
Optionally, in the second receiver module 402, when the beginning character position for sending DRS is a subframe
First OFDM symbol when, protection interval be located at DRS places subframe previous subframe on last
In OFDM symbol.
Optionally, in the second receiver module 402, when the beginning character position for sending DRS is not a son
During the first OFDM symbol of frame, protection interval is located at the previous of the beginning character position of DRS in subframe
In OFDM symbol.
Optionally, in the 3rd receiver module 403, when in the multiple base stations on same unauthorized carrier wave
On a wherein base station, when DRS multiplexings are transmitted in channel region, the time span of protection interval is:TL1
≤LGAP< TL2, wherein, LGAPRepresent the time span of protection interval, TL1Represent the DRS letters in LAA
The time required to road is monitored, TL2Represent and first intercept the letter that transmits bursty data in LBT mechanism afterwards according to LAA
What the shortest time needed for the channel-monitoring of shortest time and/or WIFI bursty datas needed for road monitoring was configured
Time value.
Optionally, in the 3rd receiver module 403, when its in the multiple unauthorized carrier wave of same base station
In on a carrier wave, when DRS multiplexings are transmitted in channel region, the time span of protection interval is:TL3≤
LGAP< TL4, wherein, LGAPRepresent the time span of protection interval, TL3Represent the DRS channels in LAA
Monitor the transmission of required time and radio-frequency devices and receive between conversion time and value, TL4Represent according to LAA
First intercept and transmit in LBT mechanism the shortest time needed for the channel-monitoring of bursty data afterwards and/or WIFI happens suddenly
The time value that shortest time needed for the channel-monitoring of data is configured.
Above-described is the preferred embodiment of the present invention, it should be pointed out that for the ordinary people of the art
For member, some improvements and modifications can also be made under the premise of without departing from principle of the present invention, these
Improvements and modifications are also within the scope of the present invention.
Claims (26)
1. a kind of method for finding the transmission of reference signal DRS, is applied to base station, it is characterised in that the side
Method includes:
Auxiliary is authorized to access on the unauthorized frequency range carrier wave of LAA in LTE system, by DRS multiplexings in letter
Road is transmitted to terminal in region, wherein, the channel region at least includes Physical Downlink Shared Channel PDSCH
Region, and sending on the orthogonal frequency division multiplex OFDM symbol that the PDSCH region before DRS is located
Pre-set the protection interval of part OFDM symbol length.
2. method according to claim 1, it is characterised in that authorize auxiliary in LTE system described
Adjuvant grafting enters on the unauthorized frequency range carrier wave of LAA, and DRS multiplexings are transmitted to before terminal in channel region,
Methods described also includes:
Position configuration information and the setting protection of the protection interval in the OFDM symbol is set
The time span being spaced in the OFDM symbol, wherein, carry in the position configuration information described
Position of the protection interval in the OFDM symbol.
3. method according to claim 2, it is characterised in that the protection interval is set exists described
Position configuration information and the setting protection interval in the OFDM symbol is in the OFDM symbol
Time span after, methods described also includes:
The position configuration information is sent by signaling is preserved to one to terminal or by the position configuration information
In preset rules, wherein, the position configuration information is carried in the signaling;
Send to terminal or incite somebody to action by time span of the signaling by the protection interval in the OFDM symbol
The time span is preserved into a preset rules, wherein, the protection interval is carried in the signaling and is existed
Time span in the OFDM symbol.
4. method according to claim 2, it is characterised in that the protection interval is set exists described
In position configuration information in the OFDM symbol,
When sending when starting the first OFDM symbol that character position is subframe of DRS, between the protection
Every in last OFDM symbol in the previous subframe of DRS places subframe.
5. method according to claim 2, it is characterised in that the protection interval is set exists described
In position configuration information in the OFDM symbol,
When sending when to start character position be not the first OFDM symbol of subframe of DRS, the protection
It is located at interval in the previous OFDM symbol of beginning character position of DRS in the subframe.
6. method according to claim 2, it is characterised in that the protection interval is set exists described
In time span in the OFDM symbol,
When on the wherein base station in the multiple base stations on same unauthorized carrier wave, by DRS multiplexings in channel
When transmitting in region, the time span of the protection interval is:TL1≤LGAP< TL2, wherein,
The LGAPRepresent the time span of the protection interval, the TL1Represent the DRS letters in LAA
The time required to road is monitored, the TL2Expression transmit afterwards bursty data in LBT mechanism according to first intercepting for LAA
Channel-monitoring needed for shortest time and/or WIFI bursty datas channel-monitoring needed for the shortest time set
The time value put.
7. method according to claim 2, it is characterised in that the protection interval is set exists described
In time span in the OFDM symbol,
When on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, by DRS multiplexings in channel region
When transmitting in domain, the time span of the protection interval is:TL3≤LGAP< TL4, wherein,
The LGAPRepresent the time span of the protection interval, the TL3Represent the DRS letters in LAA
Monitor the transmission of required time and radio-frequency devices and receive between conversion time and value, the T in roadL4Represent root
According to LAA first intercept transmit afterwards in LBT mechanism the shortest time needed for the channel-monitoring of bursty data and/or
The time value that shortest time needed for the channel-monitoring of WIFI bursty datas is configured.
8. a kind of method for finding the transmission of reference signal DRS, is applied to terminal, it is characterised in that the side
Method includes:
Receive on the unauthorized frequency range carrier wave that auxiliary access LAA is authorized in LTE system that base station sends, it is multiple
The DRS transmitted in channel region, wherein, the channel region at least includes Physical Downlink Shared Channel
PDSCH region, and sending the orthogonal frequency division multiplex OFDM that the PDSCH region before DRS is located
The protection interval of part OFDM symbol length is pre-set on symbol.
9. method according to claim 8, it is characterised in that the reception base station send in LTE
Authorize auxiliary to access on the unauthorized frequency range carrier wave of LAA in system, be multiplexed the DRS transmitted in channel region
Before, methods described also includes:
Receive the signaling of base station transmission or the protection interval of base station setting is obtained from a preset rules described
Position configuration information in OFDM symbol, and the protection interval is pointed to according to the position configuration information
PDSCH in corresponding OFDM symbol carries out rate-matched, wherein, in the signaling and preset rules
The position configuration information is equipped with, the protection interval is carried in the position configuration information described
Position in OFDM symbol;
Receive the signaling of base station transmission or the protection interval of base station setting is obtained from a preset rules described
Time span in OFDM symbol, wherein, protection interval is equipped with the signaling and preset rules in institute
State the time span in OFDM symbol.
10. method according to claim 9, it is characterised in that receive signaling that base station sends or from
During position configuration information of the protection interval of base station setting in the OFDM symbol is obtained in one preset rules,
When sending when starting the first OFDM symbol that character position is subframe of DRS, between the protection
Every in last OFDM symbol in the previous subframe of DRS places subframe.
11. methods according to claim 9, it is characterised in that receive base station send signaling or from
During position configuration information of the protection interval of base station setting in the OFDM symbol is obtained in one preset rules,
When sending when to start character position be not the first OFDM symbol of subframe of DRS, the protection
It is located at interval in the previous OFDM symbol of beginning character position of DRS in the subframe.
12. methods according to claim 9, it is characterised in that receive base station send signaling or from
During time span of the protection interval of base station setting in the OFDM symbol is obtained in one preset rules,
When on the wherein base station in the multiple base stations on same unauthorized carrier wave, by DRS multiplexings in channel
When transmitting in region, the time span of the protection interval is:TL1≤LGAP< TL2, wherein,
The LGAPRepresent the time span of the protection interval, the TL1Represent the DRS letters in LAA
The time required to road is monitored, the TL2Expression transmit afterwards bursty data in LBT mechanism according to first intercepting for LAA
Channel-monitoring needed for shortest time and/or WIFI bursty datas channel-monitoring needed for the shortest time set
The time value put.
13. methods according to claim 9, it is characterised in that receive base station send signaling or from
During time span of the protection interval of base station setting in the OFDM symbol is obtained in one preset rules,
When on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, by DRS multiplexings in channel region
When transmitting in domain, the time span of the protection interval is:TL3≤LGAP< TL4, wherein,
The LGAPRepresent the time span of the protection interval, the TL3Represent the DRS letters in LAA
Monitor the transmission of required time and radio-frequency devices and receive between conversion time and value, the T in roadL4Represent root
According to LAA first intercept transmit afterwards in LBT mechanism the shortest time needed for the channel-monitoring of bursty data and/or
The time value that shortest time needed for the channel-monitoring of WIFI bursty datas is configured.
A kind of 14. devices for finding the transmission of reference signal DRS, are applied to base station, it is characterised in that described
Device includes:
Transport module, for authorizing auxiliary to access the unauthorized frequency range carrier wave of LAA in LTE system, will
DRS multiplexings are transmitted to terminal in channel region, wherein, the channel region is at least common including physical down
Channel PDSCH region is enjoyed, and is sending the orthogonal frequency division multiplexing that the PDSCH region before DRS is located
With the protection interval that part OFDM symbol length is pre-set in OFDM symbol.
15. devices according to claim 14, it is characterised in that described device also includes setup module,
For arranging position configuration information and the setting protection of the protection interval in the OFDM symbol
The time span being spaced in the OFDM symbol, wherein, carry in the position configuration information described
Position of the protection interval in the OFDM symbol.
16. devices according to claim 15, it is characterised in that described device also includes processing module,
Preserve to one to terminal or by the position configuration information for being sent the position configuration information by signaling
In preset rules, the corresponding OFDM of the protection interval is pointed to according to the position configuration information by terminal
PDSCH on symbol carries out rate-matched, wherein, the position configuration information is carried in the signaling;
Sent to terminal or will be described by time span of the signaling by the protection interval in the OFDM symbol
Time span is preserved into a preset rules, wherein, the protection interval is carried in the signaling described
Time span in OFDM symbol.
17. devices according to claim 15, it is characterised in that in the setup module, when send out
When starting the first OFDM symbol that character position is subframe of DRS is sent, the protection interval is located at institute
State in last OFDM symbol in the previous subframe of DRS places subframe.
18. devices according to claim 15, it is characterised in that in the setup module, when send out
When to start character position be not the first OFDM symbol of subframe of DRS is sent, the protection interval is located at
In the subframe in the previous OFDM symbol of the beginning character position of DRS.
19. devices according to claim 15, it is characterised in that in the setup module, when
On a wherein base station in multiple base stations on same unauthorized carrier wave, DRS multiplexings are passed in channel region
When defeated, the time span of the protection interval is:TL1≤LGAP< TL2, wherein, the LGAPRepresent institute
State the time span of protection interval, the TL1Represent in LAA the time required to DRS channel-monitorings, it is described
TL2Represent according to LAA first intercept transmit the channel-monitoring of bursty data in LBT mechanism afterwards needed for most in short-term
Between and/or the time value that is configured of shortest time needed for the channel-monitoring of WIFI bursty datas.
20. devices according to claim 15, it is characterised in that in the setup module, when
On a wherein carrier wave in the multiple unauthorized carrier wave of same base station, DRS multiplexings are transmitted in channel region
When, the time span of the protection interval is:TL3≤LGAP< TL4, wherein, the LGAPRepresent described
The time span of protection interval, the TL3Represent in LAA the time required to DRS channel-monitorings and RF device
Between the transmission of part and reception conversion time and value, the TL4Expression is transmitted afterwards according to first intercepting for LAA
The channel-monitoring of shortest time and/or WIFI bursty datas needed for the channel-monitoring of bursty data in LBT mechanism
The time value that the required shortest time is configured.
A kind of 21. devices for finding the transmission of reference signal DRS, are applied to terminal, it is characterised in that described
Device includes:
First receiver module, the auxiliary that authorizes in LTE system for receiving base station transmission accesses the non-of LAA
Authorize on frequency range carrier wave, be multiplexed the DRS transmitted in channel region, wherein, the channel region is at least wrapped
Physical Downlink Shared Channel PDSCH region is included, and is located the PDSCH region before DRS is sent
Orthogonal frequency division multiplex OFDM symbol on pre-set the protection interval of part OFDM symbol length.
22. devices according to claim 21, it is characterised in that described device is also received including second
Module and the 3rd receiver module, second receiver module is used to receive the signaling of base station transmission or default from
Position configuration information of the protection interval that acquisition base station is arranged in rule in the OFDM symbol, and according to
The PDSCH that the position configuration information is pointed in the corresponding OFDM symbol of the protection interval enters scanning frequency
Rate is matched, wherein, the position configuration information is equipped with the signaling and preset rules, the position is matched somebody with somebody
Position of the protection interval in the OFDM symbol is carried in confidence breath;3rd receiver module
For receive base station transmission signaling or from a preset rules obtain base station arrange protection interval described
Time span in OFDM symbol, wherein, protection interval is equipped with the signaling and preset rules in institute
State the time span in OFDM symbol.
23. devices according to claim 22, it is characterised in that in second receiver module,
When sending when starting the first OFDM symbol that character position is subframe of DRS, the protection interval position
In last OFDM symbol in the previous subframe of DRS places subframe.
24. devices according to claim 22, it is characterised in that in second receiver module,
When sending when to start character position be not the first OFDM symbol of subframe of DRS, the protection interval
In the previous OFDM symbol of the beginning character position of DRS in the subframe.
25. devices according to claim 22, it is characterised in that in the 3rd receiver module,
When on the wherein base station in the multiple base stations on same unauthorized carrier wave, by DRS multiplexings in channel region
During middle transmission, the time span of the protection interval is:TL1≤LGAP< TL2, wherein, the LGAPTable
Show the time span of the protection interval, the TL1Represent in LAA the time required to DRS channel-monitorings,
The TL2Represent according to LAA first intercept transmit the channel-monitoring of bursty data in LBT mechanism afterwards needed for most
The time value that shortest time needed for the channel-monitoring of short time and/or WIFI bursty datas is configured.
26. devices according to claim 22, it is characterised in that in the 3rd receiver module,
When on the wherein carrier wave in the multiple unauthorized carrier wave of same base station, by DRS multiplexings in channel region
During transmission, the time span of the protection interval is:TL3≤LGAP< TL4, wherein, the LGAPRepresent
The time span of the protection interval, the TL3Expression the time required to DRS channel-monitorings and is penetrated in LAA
Between the transmission of frequency device and reception conversion time and value, the TL4Represent according to after first the intercepting of LAA
The channel of shortest time and/or WIFI bursty datas needed for the channel-monitoring of bursty data in transmission LBT mechanism
The time value that shortest time needed for monitoring is configured.
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