CN105207756A - Method and device for communication based on unlicensed spectrum - Google Patents
Method and device for communication based on unlicensed spectrum Download PDFInfo
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- CN105207756A CN105207756A CN201410281084.0A CN201410281084A CN105207756A CN 105207756 A CN105207756 A CN 105207756A CN 201410281084 A CN201410281084 A CN 201410281084A CN 105207756 A CN105207756 A CN 105207756A
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Abstract
The invention provides a method and a device for communication based on an unlicensed spectrum. In the first step, a base station sends a downward signaling to indicate that a first sub frame is an uplink sub frame on a first carrier and is a downlink sub frame or special sub frame on a second carrier. In the second step, a downlink RS (Reference Signal) is sent on the second carrier, and the downlink RS at least occupies one RE (Resource Element) which cannot be used in an LTE (Long Term Evolution) CSI (Channel Status Information)-RS and an LTE CRS (Cell-specific Reference Signal) in the first sub frame. In the second step, measurement CSI is received, and the reference resource of the measurement CSI includes the downlink RS. The first carrier is deployed in a licensed spectrum, the second carrier is deployed in an unlicensed spectrum, and the scheduling carrier of the second carrier is the first carrier. According to the scheme of the invention, a downlink sub frame which cannot be scheduled transmits a downlink RS for downlink channel measurement, and therefore, the accuracy of downlink channel measurement is improved, and communication resources are fully utilized. In addition, the configuration signaling and pattern of a CSI-RS in LTE are reused as much as possible. The method and the device have good 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.3GPPRAN (RadioAccessNetwork, wireless access network) 62 plenary sessions discuss a new research topic, namely the research (RP-132085) that unlicensed spectrum is comprehensive, main purpose is that the dependent (Non-standalone) of the LTE of research and utilization in unlicensed spectrum is disposed, and so-called dependent 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).In RAN#64 plenary session (seminar), the communication in unlicensed spectrum is LAA (LicenseAssistedAccess authorizes the auxiliary access of frequency spectrum) by Uniform Name.For LAA, consider its interference level uncontrollable/prediction, physical layer control signal probably only transmits on mandate frequency spectrum, and utilizes unlicensed spectrum transmitting physical layer data.
3GPPR (Release, version) introduce eIMTA (enhancedInterferenceManagementTrafficAdaptation in 12, the interference management service adaptation strengthened) technology, namely for TDD (TimeDivisionDuplex, time division duplex) frame structure, can adjust tdd frame structure by dynamic signaling, possible tdd frame structure comprises the #0 ~ 6 totally 7 kinds of tdd frame structures defined in LTE.Dynamic signaling (eIMTA signaling) for configuring frame structure has following characteristics:
-payload size equals the payload size of form 1C
-be placed on CSS (CommonSearchSpace, public search space)
-every 3 bits indicate one group of tdd frame structure, and eIMTA signaling configures at most 5 groups of tdd frame structures
-identified by eIMTA-RNTI (RadioNetworkTemporaryIdentifier, wireless network fixes tentatively identifier)
For LAA, physical layer control signal only transmits on mandate frequency spectrum.If the scheduling carrier wave of given subframe on mandate frequency spectrum is set to sub-frame of uplink, and the carrier wave that is scheduled in unlicensed spectrum is set to descending sub frame or special subframe by (such as eIMTA signaling), then described given subframe cannot be scheduled.
For the problems referred to above, the invention discloses a kind of method and apparatus utilizing unlicensed spectrum to communicate.
Summary of the invention
The invention discloses a kind of method in base station, wherein, comprise the steps:
-steps A. sending downlink signaling and indicate the first subframe to be sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier
-step B. sends descending RS (ReferenceSignal on a second carrier, reference signal), described descending RS at least occupies 1 in the first subframe can not be used for LTECSI (ChannelStatusInformation, channel condition information)-RS and LTECRS (CellspecificReferenceSignal, cell specific reference signal) RE (ResourceElement, resource particle)
-step C. receives the reference resources (ReferenceResource) measuring CSI, described measurement CSI and comprises described descending RS.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.
Second carrier wave can not be scheduled in the first subframe, so all RE of the first subframe kind can be used to send described descending RS in theory.The configuration of the scheduling carrier wave of the second carrier wave is that UE is specific, and for the transmission UE (UserEquipment, subscriber equipment) of described measurement CSI, the scheduling carrier wave of the second carrier wave is first carrier.As an embodiment, described downlink signaling comprises the UL (Uplink of configuration first carrier, up)/DL (Downlink, descending) the eIMTA signaling of the UL/DL frame structure of the SIB (SystemInformationBlock, system information block) of frame structure 1 and configuration the second carrier wave.As an embodiment, described downlink signaling comprises the eIMTA signaling of the eIMTA signaling of the UL/DL frame structure of configuration first carrier and the UL/DL frame structure of configuration the second carrier wave.As an embodiment, described downlink signaling comprises the HARQ (HybridAutomaticRetransmissionRequest of configuration first carrier, hybrid automatic repeat-request) DL is with reference to the eIMTA signaling of the RRC signaling of UL/DL frame structure and the UL/DL frame structure of configuration the second carrier wave, and described HARQDL is applicable to descending HARQ timing when first carrier carries out eIMTA operation with reference to UL/DL frame structure.
As an embodiment, first subframe adopts common CP (CyclicPrefix, Cyclic Prefix), namely OFDM (OrthogonalFrequencyDivisionMultiplexing is comprised, OFDM) symbol 0 ~ 13, the described RE that can not be used for LTECSI-RS and LTECRS comprises 3 parts:
-part 1.OFDM symbol { 2,3}
The RE that-part 2.DMRS (DemodulationReferenceSignal, demodulated reference signal) takies
The RE that can not be used for CSI-RS and DMRS in OFDM symbol belonging to-part 3.DMRS.
As an embodiment, described descending RS also occupies the RE that can be used for CSI-RS/CRS.As an embodiment, described descending RS can take any RE in the second subframe.As an embodiment, first carrier is TDD carrier wave.As an embodiment, described measurement CSI comprises { PTI (PrecodingTypeIndicator, precoding type indicates), RI (RankIndication, order indicates), PMI (PrecodingMatrixIndicator, pre-coding matrix indicates), CQI (ChannelQualityIndicator, channel status indicate) } in one or more.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS comprises K RS port respectively by K antenna port transmission, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.
1 RS port refers to the time domain that the RS that 1 antenna port sends takies, frequency domain, and code domain (if existence) resource.If multiple RS port shares identical RE by the scheme of OCC (OrthogonalCoveringCode, orthogonal covering codes), the RE that the described RE number independently taken takies before referring to each RS port OCC operation.The essence of above-mentioned aspect is, in the first subframe, distributes more traditional more resource of CSI-RS and is used for down channel measurement, and then improve channel measurement quality.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
{ the pattern of the CSI-RS of 1,2,4,8} port is devised in LTE.The essence of above-mentioned aspect is, in described K the RS port of described descending RS, each RS port comprises the expansion RS of CSI-RS and 1 port of 1 port in the first subframe, and the expansion RS of 1 port comprises M-1 RE.Compare traditional CSI-RS, the density of described descending RS in the first subframe is higher, can better meet the requirement that down channel is measured.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, the pattern of expansion RS in subframe of described K port is obtained by pattern translation in time domain of the CSI-RS of M-1 kind K port.
The essence of above-mentioned aspect is: the pattern of expansion RS in affiliated OFDM symbol of described K port is the combination of the pattern of the CSI-RS of existing M-1 kind K port.Above-mentioned aspect makes UE can reuse the existing channel estimation scheme based on CSI-RS as far as possible.
Concrete, according to an aspect of the present invention, it is characterized in that, the expansion RS of described K port occupies the RE for DMRS in the first subframe.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
Second subframe can be scheduled, and therefore can only use CSI-RS.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 1. sends high-level signaling and indicates described K and CSI-RS configuration index, and described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
As an embodiment, described high-level signaling is CSI-RS-Config-r10IEs (InformationElements, information particle), and described CSI-RS configuration index is resourceConfig-r10IE wherein.
The invention discloses a kind of method in UE, wherein, comprise the steps:
-steps A. receiving downlink signaling and determine that the first subframe is sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier
-step B. receives descending RS on a second carrier, and described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
-step C. sends the reference resources measuring CSI, described measurement CSI and comprises described descending RS.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.
As an embodiment, described measurement CSI comprises { one or more in PTI, RI, PMI, CQI}.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS comprises K RS port respectively by K antenna port transmission, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
Concrete, according to an aspect of the present invention, it is characterized in that, the pattern of expansion RS in subframe of described K port is obtained by pattern translation in time domain of the CSI-RS of M-1 kind K port.
Concrete, according to an aspect of the present invention, it is characterized in that, the expansion RS of described K port occupies the RE for DMRS in the first subframe.
Concrete, according to an aspect of the present invention, it is characterized in that, described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 1. receives high-level signaling and determines described K and CSI-RS configuration index, and described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: indicating the first subframe to be sub-frame of uplink on first carrier for sending downlink signaling, is descending sub frame or special subframe on a second carrier
Second module: for sending descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
3rd module: comprise described descending RS for receiving the reference resources measuring CSI, described measurement CSI.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
As an embodiment, first module of the said equipment also for: send high-level signaling and indicate described K and CSI-RS configuration index, described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: determining that the first subframe is sub-frame of uplink on first carrier for receiving downlink signaling, is descending sub frame or special subframe on a second carrier
Second module: for receiving descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
3rd module: comprise described descending RS for sending the reference resources measuring CSI, described measurement CSI.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
As an embodiment, first module of the said equipment also for: receive high-level signaling and determine described K and CSI-RS configuration index, described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
For LAA, physical layer control signal only transmits on mandate frequency spectrum.If the scheduling carrier wave of given subframe on mandate frequency spectrum is set to sub-frame of uplink, and the carrier wave that is scheduled in unlicensed spectrum is set to descending sub frame or special subframe by (such as eIMTA signaling), then described given subframe cannot be scheduled.
When only transmitting on mandate frequency spectrum for physical layer control signal, unlicensed spectrum may there is this problem of descending sub frame that cannot dispatch, the descending RS that the solution of the present invention utilizes the descending sub frame transmission that cannot dispatch to measure for down channel, improve the precision that down channel is measured, take full advantage of the communication resource.In addition, the present invention reuses configuration signal and the pattern of the CSI-RS in LTE 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 obtaining measurement CSI according to the descending RS in unlicensed spectrum according to an embodiment of the invention;
Fig. 2 shows candidate's subframe schematic diagram of the first subframe according to an embodiment of the invention;
Fig. 3 shows the schematic diagram of the candidate RE that descending RS according to an embodiment of the invention takies in the first subframe;
Fig. 4 shows the schematic diagram of the pattern of descending RS 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;
Fig. 6 shows the structured flowchart of the processing unit in UE 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 and obtains according to the descending RS in unlicensed spectrum the flow chart measuring CSI, as shown in Figure 1.In accompanying drawing 1, base station N1 is the serving BS of UEU2, and the step S10 identified in square frame F1, S20 are optional steps.
For base station N1, in step s 11, sending downlink signaling and indicate the first subframe to be sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier; In step s 12, send descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; In step s 13, receive the reference resources measuring CSI, described measurement CSI and comprise described descending RS.
For UEU2, in the step s 21, receiving downlink signaling and determine that the first subframe is sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier; In step S22, receive descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; In step S23, send the reference resources measuring CSI, described measurement CSI and comprise described descending RS.
In embodiment 1, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and concerning UEU2, the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.
As the sub-embodiment 1 of embodiment 1, base station N1 sends high-level signaling in step slo and indicates described K and CSI-RS configuration index; UEU2 receives high-level signaling and determines described K and CSI-RS configuration index in step S20.Wherein, described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
As the sub-embodiment 2 of embodiment 1, described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
As the sub-embodiment 3 of embodiment 1, described downlink signaling comprises the eIMTA signaling of the eIMTA signaling of the UL/DL frame structure of configuration first carrier and the UL/DL frame structure of configuration the second carrier wave.
As the sub-embodiment 4 of embodiment 1, described downlink signaling comprises the SIB1 of the eIMTA signaling of the UL/DL frame structure of configuration first carrier and the UL/DL frame structure of configuration the second carrier wave.
As the sub-embodiment 5 of embodiment 1, described M is 2.
Embodiment 2
Embodiment 2 illustrates candidate's subframe schematic diagram of the first subframe in embodiment 1, as shown in Figure 2.In accompanying drawing 2, be deployed in and authorize the first carrier of frequency spectrum to adopt tdd frame structure, wherein D represents descending sub frame, U represents sub-frame of uplink, S represents special subframe, and F represents that on-fixed subframe-namely may be up or descending sub frame, and the grid of oblique line mark is candidate's subframe of the first subframe.Second carrier wave is deployed in unlicensed spectrum, and its scheduling carrier wave is first carrier.
Embodiment 3
Embodiment 3 illustrates the schematic diagram of the candidate RE taken in descending RS the first subframe in embodiment 1, as shown in Figure 3.In accompanying drawing 3, the grid of backslash mark is part 1, and the grid of oblique line mark is part 2, and the grid of vertical line mark is part 3.
In first subframe, the RE that can not be used for LTECSI-RS and LTECRS comprises 3 parts:
-part 1.OFDM symbol { the grid of 2,3}-backslash mark.
The grid of the RE-oblique line mark that-part 2.DMRS takies.
The grid that can not be used for the RE-vertical line mark of CSI-RS and DMRS in OFDM symbol belonging to-part 3.DMRS.
Embodiment 4
Embodiment 4 illustrates the schematic diagram of the pattern of descending RS, as shown in Figure 4.In accompanying drawing 4, the grid of oblique line mark is the first subframe, and the grid of backslash mark is the second subframe.The RE of the corresponding same RS port of lattice that same numbers is filled, the lattice that overstriking collimation mark is known is the RE that traditional CSI-RS takies.
For base station, first send high-level signaling and indicate described K and CSI-RS configuration index; Then sending downlink signaling indicates the first subframe to be sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier; Then send descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; Finally receive the reference resources measuring CSI, described measurement CSI and comprise described descending RS.
For UE, first receive high-level signaling and determine described K and CSI-RS configuration index; Then receiving downlink signaling and determine that the first subframe is sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier; Then receive descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; Finally send the reference resources measuring CSI, described measurement CSI and comprise described descending RS.
In embodiment 4, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and concerning UEU2, the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises 8 RS ports, is sent respectively by 8 antenna ports, and the RE number that 1 described RS port independently takies in the first subframe is 2.Described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.The RE that described 8 RS ports take is filled with the CSI-RS (lattice that overstriking collimation mark is known) of numeral 0 ~ 7 (RE on same carrier wave adjacent-symbol have employed OCC)-comprise 1 group of 8 port and the expansion RS of 1 group of 8 port respectively.
As the sub-embodiment 1 of embodiment 4, described descending RS only includes the CSI-RS (lattice that overstriking collimation mark is known) of described 8 ports in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
As the sub-embodiment 2 of embodiment 4, the pattern of expansion RS in subframe of described 8 ports is obtained by the translation in time domain of the pattern of the CSI-RS of a kind of 8 port.
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 is by sending module 301, and sending module 302 and receiver module 303 form.
Sending module 301 indicates the first subframe to be sub-frame of uplink on first carrier for sending downlink signaling, is descending sub frame or special subframe on a second carrier; Sending module 302 is for sending descending RS on a second carrier, and described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; Receiver module 303 comprises described descending RS for receiving the reference resources measuring CSI, described measurement CSI.
In embodiment 5, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.Described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
As the sub-embodiment 1 of embodiment 5, described downlink signaling comprises the eIMTA signaling of the UL/DL frame structure of configuration first carrier.Second carrier wave adopts full downlink frame structure.
Embodiment 6
Embodiment 6 illustrates the structured flowchart of the processing unit in a UE, as shown in Figure 6.In accompanying drawing 6, UE processing unit 400 is by receiver module 401, and receiver module 402 and sending module 403 form.
For receiving downlink signaling, receiver module 401 determines that the first subframe is sub-frame of uplink on first carrier, be descending sub frame or special subframe on a second carrier; Receiver module 402 is for receiving descending RS on a second carrier, and described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe; Sending module 403 comprises described descending RS for sending the reference resources measuring CSI, described measurement CSI.
In embodiment 6, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.Described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
As the sub-embodiment 1 of embodiment 6, described downlink signaling comprises the eIMTA signaling of the SIB1 of the UL/DL frame structure of configuration first carrier and the UL/DL frame structure of configuration the second carrier wave.
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 (14)
1. the method in base station, wherein, comprises the steps:
-steps A. sending downlink signaling and indicate the first subframe to be sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier
-step B. sends descending RS on a second carrier, and described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
-step C. receives the reference resources measuring CSI, described measurement CSI and comprises described descending RS.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.
2. method according to claim 1, is characterized in that, described descending RS comprises K RS port and sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.
3. method according to claim 2, is characterized in that, described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
4. method according to claim 3, is characterized in that, the pattern of expansion RS in subframe of described K port is obtained by pattern translation in time domain of the CSI-RS of M-1 kind K port.
5. according to claim 3, the method described in 4, is characterized in that, described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
6. method according to claim 5, is characterized in that, described steps A also comprises the steps:
-steps A 1. sends high-level signaling and indicates described K and CSI-RS configuration index, and described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
7. the method in UE, wherein, comprises the steps:
-steps A. receiving downlink signaling and determine that the first subframe is sub-frame of uplink on first carrier, is descending sub frame or special subframe on a second carrier
-step B. receives descending RS on a second carrier, and described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
-step C. sends the reference resources measuring CSI, described measurement CSI and comprises described descending RS.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.
8. method according to claim 7, is characterized in that, described descending RS comprises K RS port and sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.
9. method according to claim 8, is characterized in that, described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
10. method according to claim 9, is characterized in that, the pattern of expansion RS in subframe of described K port is obtained by pattern translation in time domain of the CSI-RS of M-1 kind K port.
11. according to claim 9, and the method described in 10, is characterized in that, described descending RS only includes the CSI-RS of described K port in the second subframe.Second subframe is all descending sub frame on first carrier and the second carrier wave.
12. methods according to claim 11, is characterized in that, described steps A also comprises the steps:
-steps A 1. receives high-level signaling and determines described K and CSI-RS configuration index, and described CSI-RS configuration index indicates the pattern of the expansion RS of the CSI-RS of described K port and described K port.
13. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: indicating the first subframe to be sub-frame of uplink on first carrier for sending downlink signaling, is descending sub frame or special subframe on a second carrier
Second module: for sending descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
3rd module: comprise described descending RS for receiving the reference resources measuring CSI, described measurement CSI.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
14. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: determining that the first subframe is sub-frame of uplink on first carrier for receiving downlink signaling, is descending sub frame or special subframe on a second carrier
Second module: for receiving descending RS on a second carrier, described descending RS at least occupies the RE that can not be used for LTECSI-RS and LTECRS in the first subframe
3rd module: comprise described descending RS for sending the reference resources measuring CSI, described measurement CSI.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the scheduling carrier wave of the second carrier wave is first carrier.Described descending RS comprises K RS port and is sent by K antenna port respectively, and the RE number that 1 described RS port independently takies in the first subframe is M.Described K be one in 1,2,4,8}, and described M be greater than 1 positive integer.Described descending RS comprises the expansion RS of CSI-RS and 1 group of K port of 1 group of K port in the first subframe, described K port and described K antenna port one_to_one corresponding.
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| CN109818726A (en) | 2019-05-28 |
| CN109818726B (en) | 2021-03-26 |
| CN105207756B (en) | 2019-04-26 |
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