CN105099612A - Method and device for transmission over unlicensed spectrum - Google Patents
Method and device for transmission over unlicensed spectrum Download PDFInfo
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- CN105099612A CN105099612A CN201410211987.1A CN201410211987A CN105099612A CN 105099612 A CN105099612 A CN 105099612A CN 201410211987 A CN201410211987 A CN 201410211987A CN 105099612 A CN105099612 A CN 105099612A
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Abstract
The invention provides a method and a device for transmission over an unlicensed spectrum. In order to solve the interference problem of a downlink reference signal (RS) used for user equipment (UE) measurement and sent by a base station during the communication process over a long-term evolution (LTE) unlicensed spectrum, the invention provides a method applied to the UE. The method comprises the steps of firstly, receiving a first signaling on a first carrier; secondly, receiving a downlink RS within a first time window of a second carrier. The first signaling is in the form of a physical layer signaling and the first carrier is deployed over a licensed spectrum. The second carrier is deployed over an unlicensed spectrum. The first time window comprises N sub-frames and N is a positive integer. The first signaling indicates a transmission band occupied by the downlink RS and the transmission band is the whole part or one part of the frequency band of the second carrier. According to the technical scheme of the invention, the interference of the periodically sent downlink RS on other communication equipment over the unlicensed spectrum is avoided. Meanwhile, the requirement of the UE on fast DFS can be met at the same time. In addition, the technical scheme of the invention can be compatible with existing LTE protocols in the prior art as much as possible and is better in compatibility.
Description
Technical field
The present invention relates in wireless communication system the scheme utilizing unlicensed spectrum to communicate, particularly relate to the communication means for unlicensed spectrum (UnlicensedSpectrum) based on LTE (LongTermEvolution, Long Term Evolution) and device.
Background technology
Traditional 3GPP (3rdGenerationPartnerProject, third generation partner program) in LTE system, transfer of data can only occur in authorizes on frequency spectrum, but along with the sharply increase of traffic carrying capacity, especially in some urban areas, frequency spectrum is authorized may to be difficult to the demand meeting traffic carrying capacity.62 plenary sessions of 3GPPRAN discuss a new research topic, namely the research (RP-132085) that unlicensed spectrum is comprehensive, main purpose is that the Non-standalone (dependent) of the LTE of research and utilization in unlicensed spectrum disposes, and so-called Non-standalone refers to that the communication in unlicensed spectrum is wanted and authorizes the Serving cell on frequency spectrum to be associated.One intuitively method be the CA (CarrierAggregation reused as far as possible in existing system, carrier aggregation) concept, namely be deployed in and authorize Serving cell on frequency spectrum as PCC (PrimaryComponentCarrier, main carrier), be deployed in Serving cell in unlicensed spectrum as SCC (SecondaryComponentCarrier, auxiliary carrier wave).For unlicensed spectrum, consider its interference level uncontrollable/prediction, LBT (ListenBeforeTalk first intercepts rear transmission) technology effectively can avoid the interference between LTE system and other system and the interference between the inner different operators equipment of LTE system.
Further, in order to avoid LTE equipment long time take (other system or other operators) access that a fixed frequency band brings and block, DFS (DynamicalFrequencySelection, dynamic spectrum is selected) technology becomes a solution intuitively, i.e. the discontinuous carrier wave taken in unlicensed spectrum of LTE equipment.Technology can as the design reference of LTE unlicensed spectrum communication plan for the cellulor on-off (start-close) discussed in 3GPPR12.During cellulor off state, base station equipment still sends descending RS (ReferenceSignal, reference signal) for UE (UserEquipment, subscriber equipment) down-run survey, described down-run survey be conducive to reduce cellulor from off state to the switching time of on state.
And LTE unlicensed spectrum is communicated, if LTE base station continues to send descending RS (for shortening the switching time of DFS), described descending RS probably produces interference (even if the transmission frequency of described descending RS is very low) with the signal of other system or the signal of other operators.For the problems referred to above, the invention discloses a kind of method and apparatus utilizing unlicensed spectrum to transmit.
Summary of the invention
Inventor is found by research, be deployed in unlicensed spectrum for transmit LTE data operating carriers may the carrier wave generation of (instead of all) of part and other system overlapping, especially consider that the bandwidth of the carrier wave in unlicensed spectrum may much larger than 20MHz (megahertz), described operating carriers may only have little fractional bandwidth produce overlapping, therefore for UE (UserEquipment, subscriber equipment) as long as the frequency domain bandwidth of the descending RS measured avoids described overlapping part.
The invention discloses a kind of method in UE, wherein, comprise the steps:
-steps A. on first carrier, receive the first signaling
-step B. receives descending RS in the very first time window of the second carrier wave
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.
Described descending RS is not the DMRS (DemodulationReferenceSignal, demodulated reference signal) for physical layer data demodulation.As an embodiment, the first signaling is positioned at CSS (CommonSearchSpace, public search space) broadcast signaling.As an embodiment, first signaling is by the specific RNTI (RadioNetworkTemporaryIdentifier in community, wireless network fixes tentatively identifier) mark, namely the CRC (CyclicRedundancyCheck, cyclic redundancy check (CRC) code) of the first signaling is by the specific RNTI scrambler in community.As an embodiment, the information bit position of the first signaling equals the information bit of DCI (DownlinkControlInformation, Downlink Control Information) the form 1C that first carrier sends.As an embodiment, the band of the second carrier wave is wider than 20MHz.As an embodiment, very first time window be by the transmission subframe of the first signaling after d subframe, described d is 0 or positive integer.As an embodiment, the sequence of described descending RS is the transmission PRB (PhysicalResourceBlock of corresponding descending RS in characteristic sequence, Physical Resource Block) on sampling, described characteristic sequence is that the described descending RS of supposition is distributed in the upper and pseudo random sequence of generation of whole PRB of the second carrier wave.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-step C. feeds back and measures CSI (ChannelStatusIndicator, channel status indicates), and the reference resources (ReferenceResource) of described measurement CSI comprises described descending RS.
Wherein, described CSI comprises { RI (RankIndicator, order indicates), PTI (PrecodingTypeIndicator, precoding type indicates), PMI (PrecodingMatrixIndicator, pre-coding matrix indicates), CQI (ChannelQualityIndicator, channel quality indicates), RSRP (ReferenceSignalReceivingPower, Reference Signal Received Power), RSRQ (ReferenceSignalReceivingQuality, Reference Signal Received Quality) } in one or more.
Described UE performs filtering operation to described reference resources and obtains described measurement CSI.
Concrete, according to an aspect of the present invention, it is characterized in that, the EPRE of described descending RS in very first time window (EnergyPerResourceElement, every resource particle energy) is fixing, the described EPRE of the auxiliary instruction of the first signaling.
As an embodiment, first signaling indicates the relative referenceSignalPowerIE (InformationElement of described EPRE, information unit) ratio of energy that configures, the unit of described EPRE is dBm (milli decibel), and described ratio is linear value or decibel (dB) value.
Concrete, according to an aspect of the present invention, it is characterized in that, described transmission band comprises M PRB (PhysicalResourceBlock, Physical Resource Block) bandwidth, described descending RS is identical at each PRB to the interior RE (ResourceElement, resource particle) taken, and described descending RS is one of following at each PRB to the interior RE taken:
-K1 CSI-RS (ChannelStatusIndicatorReferenceSignal, channel status instruction reference signal) antenna port (AntennaPort) at a PRB to the interior RE taken
-K2 CRS (CellReferenceSignal, cell reference signals) antenna port at a PRB to the interior RE taken
Wherein, described K1 is that { one in 1,2,4,8}, described K2 is that { one in 1,2,4}, described M is positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, described N is 1, and very first time window is the transmission subframe of the first signaling.
The transmission bandwidth of base station according to the real-time configurating downlink RS of the interference level detected on a second carrier is guaranteed in above-mentioned aspect.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 0. receives the second signaling and obtains described descending RS at each PRB to the interior RE taken
Wherein, the second signaling is high-level signaling.
As an embodiment, the second signaling is RRC (RadioResourceControl, RRM) layer signaling, and the second signaling indicates the antenna port index of described descending RS.
Concrete, according to an aspect of the present invention, it is characterized in that, a described M PRB comprises M1 PRB group, and each described PRB group comprises continuous print PRB on M2 frequency domain, and described M1 is positive integer, and described M2 is positive integer.Described M2 is determined by the bandwidth of the second carrier wave, or configurable, or fixing.
Described M equals described M1 and is multiplied by described M2.
As an embodiment, described M2 is fixed as 6.As an embodiment, described transmission band adopts the mode of bit diagram (Bitmap) to indicate by the first signaling, bit instruction M2 continuous P RB.
The invention discloses a kind of method in base station, wherein, comprise the steps:
-steps A. on first carrier, send the first signaling
-step B. sends descending RS in the very first time window of the second carrier wave
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.
Described descending RS is not DMRS.As an embodiment, first signaling is positioned at USS (UESearchSpace, the specific search volume of UE) by the specific RNTI (RadioNetworkTemporaryIdentifier of UE, wireless network fixes tentatively identifier) physical layer signaling that identifies, i.e. CRC (the CyclicRedundancyCheck of the first signaling, cyclic redundancy check (CRC) code) by the specific RNTI scrambler of UE, the position of the first signaling in USS is identified by the specific RNTI of described UE.As an embodiment, the information bit position of the first signaling equals the DCI (DownlinkControlInformation for dispatching the second carrier wave that first carrier sends, Downlink Control Information) information bit of form 1A, the bit of the 0/1A flag bit wherein in corresponding DCI format 1A is for identifying the first signaling format and DCI format 1A, and the present embodiment is particularly useful for the second carrier wave only for the scene of downlink transfer.
As an embodiment, described N is greater than 1, and the time interval in described N number of subframe between adjacent two subframes is equal, and the described time interval is g subframe, and described g is positive integer, and described g is pre-determining or configurable.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-step C. receives the reference resources measuring CSI, described measurement CSI and comprises described descending RS
Wherein, described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
Concrete, according to an aspect of the present invention, it is characterized in that, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, described transmission band comprises the bandwidth of M PRB, and described descending RS is identical at each PRB to the interior RE taken, and described descending RS is one of following at each PRB to the interior RE taken:
-K1 CSI-RS antenna port at a PRB to the interior RE taken
-K2 CRS antenna port at a PRB to the interior RE taken
Wherein, described K1 is that { one in 1,2,4,8}, described K2 is that { one in 1,2,4}, described M is positive integer.
As an embodiment, the sequence of described descending RS is the sampling on the transmission PRB of corresponding descending RS in characteristic sequence, and described characteristic sequence is that the described descending RS of supposition is distributed in the upper and pseudo random sequence of generation of whole PRB of the second carrier wave.
Concrete, according to an aspect of the present invention, it is characterized in that, described N is 1, and very first time window is the transmission subframe of the first signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 0. sends the described descending RS of the second signaling instruction at each PRB to the interior RE taken
Wherein, the second signaling is high-level signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, a described M PRB comprises M1 PRB group, and each described PRB group comprises continuous print PRB on M2 frequency domain, and described M1 is positive integer, and described M2 is positive integer.Described M2 is determined by the bandwidth of the second carrier wave, or configurable, or fixing.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: for receiving the first signaling on first carrier
Second module: for receiving descending RS in the very first time window of the second carrier wave
3rd module: comprise described descending RS for feeding back the reference resources measuring CSI, described measurement CSI
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
As an embodiment, the feature of the said equipment is, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: for sending the first signaling on first carrier
Second module: for sending descending RS in the very first time window of the second carrier wave
3rd module: comprise described descending RS for receiving the reference resources measuring CSI, described measurement CSI
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
As an embodiment, the feature of the said equipment is, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
For the interference problem that base station transmission in the communication of LTE unlicensed spectrum faces for the descending RS that UE measures, the present invention proposes a kind of method in UE, wherein, step one is on first carrier, receive the first signaling; Step 2 receives descending RS in the very first time window of the second carrier wave.Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.The scheme that the present invention proposes avoids the descending RS of periodically transmission to the interference of other communication equipments in unlicensed spectrum, meets the demand of the quick DFS of UE simultaneously.In addition, existing LTE protocol that the solution of the present invention is compatible as far as possible, has good compatibility.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the flow chart of dispatching downlink RS in unlicensed spectrum according to an embodiment of the invention;
Fig. 2 shows the schematic diagram of the first signaling according to an embodiment of the invention;
Fig. 3 shows the transmission band schematic diagram of descending RS according to an embodiment of the invention;
Fig. 4 shows the structured flowchart of the processing unit in UE according to an embodiment of the invention;
Fig. 5 shows the structured flowchart of the processing unit in base station according to an embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 illustrates the flow chart of dispatching downlink RS in unlicensed spectrum, as shown in Figure 1.In accompanying drawing 1, base station N1 is the serving BS of UEU2.
For base station N1, in step s 11, first carrier sends the first signaling; In step s 12, in the very first time window of the second carrier wave, descending RS is sent; In step s 11, measurement CSI is received.For UEU2, in the step s 21, first carrier receives the first signaling; In step S22, in the very first time window of the second carrier wave, receive descending RS; In step S23, feedback measures CSI.
In embodiment 1, the first signaling is physical layer signaling, and first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, and very first time window comprises N number of subframe, and described N is positive integer, the transmission band that the described descending RS of first signaling instruction takies, described transmission band is all or part of of the frequency band of the second carrier wave, and the reference resources of described measurement CSI comprises described descending RS, described CSI comprises { RI, PTI, PMI, CQI, one or more in RSRP, RSRQ}.
As the sub-embodiment 1 of embodiment 1, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
As the sub-embodiment 2 of embodiment 1, described transmission band comprises the bandwidth of M PRB, and described descending RS is identical at each PRB to the interior RE taken, and described descending RS is one of following at each PRB to the interior RE taken:
-K1 CSI-RS antenna port at a PRB to the interior RE taken
-K2 CRS antenna port at a PRB to the interior RE taken
Wherein, described K1 is that { one in 1,2,4,8}, described K2 is that { one in 1,2,4}, described M is positive integer.
As the sub-embodiment 3 of embodiment 1, first signaling is positioned at the physical layer signaling of USS by the specific RNTI mark of UE, the information bit position of the first signaling equals the information bit of the DCI format 1A for dispatching the second carrier wave that first carrier sends, and the bit of the 0/1A flag bit wherein in corresponding DCI format 1A is for identifying the first signaling format and DCI format 1A.
Sub-embodiment 4, first signaling as embodiment 1 is positioned at CSS, and the CRC of the first signaling is by the specific RNTI scrambler in community.The information bit position of the first signaling equals the information bit of the DCI format 1C that first carrier sends.
Embodiment 2
Embodiment 2 illustrates the schematic diagram of the first signaling, as shown in Figure 2.In accompanying drawing 2, flag bit and interpolation bit are optional, with broken line representation.
For base station, first on first carrier, send the first signaling; Then in the very first time window of the second carrier wave, descending RS is sent.For UEU2, first on first carrier, receive the first signaling; Then in the very first time window of the second carrier wave, descending RS is received.
In embodiment 2, the first signaling is physical layer signaling, and first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and very first time window comprises N number of subframe, and described N is positive integer.First signaling comprises the first index ~ the L index, and L is positive integer.A described index is deployed in the frequency band of the RS for UE measurement of the carrier wave in unlicensed spectrum for one.A described index in first signaling is used to indicate the transmission band that described descending RS takies, and described transmission band is all or part of of the frequency band of the second carrier wave.
As the sub-embodiment 1 of embodiment 2, the payload size of the first signaling equals the payload size of the DCI format 1A for dispatching the second carrier wave that first carrier transmits, and the first signaling also comprises the flag bit of 1 bit for distinguishing form and the DCI format 1A of the first signaling.
Sub-embodiment 2, first signaling as embodiment 2 also comprises the interpolation bit of redundancy for guaranteeing that the payload size of the first signaling equals a kind of payload size of traditional DCI format to reduce blind Detecting number of times.The form of the first signaling and described traditional DCI format are distinguished by flag bit or mark RNTI.
Embodiment 3
Embodiment 3 illustrates the transmission band schematic diagram of descending RS, as shown in Figure 3.In accompanying drawing 3, the grid of oblique line mark is the PRB group that descending RS takies, and blank boxes is the PRB group not transmitting descending RS.
For base station, first send the second signaling and on first carrier, send the first signaling; Then in the very first time window of the second carrier wave, descending RS is sent; Then receive and measure CSI.For UE, first receive the second signaling and on first carrier, receive the first signaling; Then in the very first time window of the second carrier wave, descending RS is received; Then feedback measures CSI.
In embodiment 3, the first signaling is physical layer signaling, and first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, and very first time window comprises N number of subframe, and described N is positive integer, the transmission band that the described descending RS of first signaling instruction takies, described transmission band is all or part of of the frequency band of the second carrier wave, and the reference resources of described measurement CSI comprises described descending RS, described CSI comprises { RI, PTI, PMI, CQI, one or more in RSRP, RSRQ}.Described transmission band comprises the bandwidth of M PRB, described descending RS is identical at each PRB to the interior RE taken, described descending RS is K1 CSI-RS antenna port at each PRB to the interior RE taken is { 1 at a PRB to K1 described in the interior RE taken, 2,4, one in 8}, described M is positive integer.The described descending RS of second signaling instruction to the interior RE taken, namely indicates described K1 CSI-RS port at each PRB.A described M PRB comprises M1 PRB group (grid of oblique line mark), and each described PRB group comprises continuous print PRB on M2 frequency domain, and described M1 is positive integer, and described M2 is positive integer.
As the sub-embodiment 1 of embodiment 3, described M2 is determined by the bandwidth of the second carrier wave, and the wider described M2 of bandwidth of the second carrier wave is larger.
Embodiment 4
Embodiment 4 illustrates the structured flowchart of the processing unit in UE, as shown in Figure 4.In accompanying drawing 4, UE processing unit 200 by receiver module 201, receiver module 202, and sending module 203 forms.
Receiver module 201 for receiving the first signaling on first carrier; Receiver module 202 for receiving descending RS in the very first time window of the second carrier wave; Sending module 203 comprises described descending RS for feeding back the reference resources measuring CSI, described measurement CSI.
In embodiment 4, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.The EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
As the sub-embodiment 1 of embodiment 4, receiver module 201 also obtains described descending RS at each PRB to the interior RE taken for receiving the second signaling.Wherein, the second signaling is high-level signaling.
Embodiment 5
Embodiment 5 illustrates the structured flowchart of the processing unit in a base station, as shown in Figure 5.In accompanying drawing 5, base station processing unit 300 by sending module 301, sending module 302, and receiver module 303 forms.
Sending module 301 for sending the first signaling on first carrier; Sending module 302 for sending descending RS in the very first time window of the second carrier wave; Receiver module 303 comprises described descending RS for receiving the reference resources measuring CSI, described measurement CSI
In embodiment 5, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.Described N is 1, and very first time window is the transmission subframe of the first signaling.
As the sub-embodiment 1 of embodiment 5, receiver module 201 is also for sending the described descending RS of the second signaling instruction at each PRB to the interior RE taken.Wherein, the second signaling is high-level signaling.
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (18)
1. the method in UE, wherein, comprises the steps:
-steps A. on first carrier, receive the first signaling
-step B. receives descending RS in the very first time window of the second carrier wave
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.
2. method according to claim 1, is characterized in that, also comprises the steps:
-step C. feeds back the reference resources measuring CSI, described measurement CSI and comprises described descending RS
Wherein, described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
3. method according to claim 1, is characterized in that, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
4. the method according to claim 1-3, is characterized in that, described transmission band comprises the bandwidth of M PRB, and described descending RS is identical at each PRB to the interior RE taken, and described descending RS is one of following at each PRB to the interior RE taken:
-K1 CSI-RS antenna port at a PRB to the interior RE taken
-K2 CRS antenna port at a PRB to the interior RE taken
Wherein, described K1 is that { one in 1,2,4,8}, described K2 is that { one in 1,2,4}, described M is positive integer.
5. the method according to claim 1-3, is characterized in that, described N is 1, and very first time window is the transmission subframe of the first signaling.
6. method according to claim 4, is characterized in that, described steps A also comprises the steps:
-steps A 0. receives the second signaling and obtains described descending RS at each PRB to the interior RE taken
Wherein, the second signaling is high-level signaling.
7. method according to claim 4, is characterized in that, a described M PRB comprises M1 PRB group, and each described PRB group comprises continuous print PRB on M2 frequency domain, and described M1 is positive integer, and described M2 is positive integer.Described M2 is determined by the bandwidth of the second carrier wave, or configurable, or fixing.
8. the method in base station, wherein, comprises the steps:
-steps A. on first carrier, send the first signaling
-step B. sends descending RS in the very first time window of the second carrier wave
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.
9. method according to claim 8, is characterized in that, also comprises the steps:
-step C. receives the reference resources measuring CSI, described measurement CSI and comprises described descending RS
Wherein, described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
10. method according to claim 8, is characterized in that, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
11. methods according to Claim 8 described in-10, it is characterized in that, described transmission band comprises the bandwidth of M PRB, and described descending RS is identical at each PRB to the interior RE taken, and described descending RS is one of following at each PRB to the interior RE taken:
-K1 CSI-RS antenna port at a PRB to the interior RE taken
-K2 CRS antenna port at a PRB to the interior RE taken
Wherein, described K1 is that { one in 1,2,4,8}, described K2 is that { one in 1,2,4}, described M is positive integer.
12. methods according to Claim 8 described in-10, it is characterized in that, described N is 1, and very first time window is the transmission subframe of the first signaling.
13. methods according to claim 11, is characterized in that, described steps A also comprises the steps:
-steps A 0. sends the described descending RS of the second signaling instruction at each PRB to the interior RE taken
Wherein, the second signaling is high-level signaling.
14. methods according to claim 11, is characterized in that, a described M PRB comprises M1 PRB group, and each described PRB group comprises continuous print PRB on M2 frequency domain, and described M1 is positive integer, and described M2 is positive integer.Described M2 is determined by the bandwidth of the second carrier wave, or configurable, or fixing.
15. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: for receiving the first signaling on first carrier
Second module: for receiving descending RS in the very first time window of the second carrier wave
3rd module: comprise described descending RS for feeding back the reference resources measuring CSI, described measurement CSI
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
16. equipment according to claim 15, is characterized in that, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
17. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: for sending the first signaling on first carrier
Second module: for sending descending RS in the very first time window of the second carrier wave
3rd module: comprise described descending RS for receiving the reference resources measuring CSI, described measurement CSI
Wherein, first signaling is physical layer signaling, first carrier is deployed in mandate frequency spectrum, second carrier wave is deployed in unlicensed spectrum, very first time window comprises N number of subframe, described N is positive integer, the transmission band that the described descending RS of the first signaling instruction takies, and described transmission band is all or part of of the frequency band of the second carrier wave.Described CSI comprises { one or more in RI, PTI, PMI, CQI, RSRP, RSRQ}.
18. equipment according to claim 17, is characterized in that, the EPRE of described descending RS in very first time window is constant, the described EPRE of the auxiliary instruction of the first signaling.
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