CN105472702A - Cell search method and cell search device in LAA (License Assisted Access) communication - Google Patents
Cell search method and cell search device in LAA (License Assisted Access) communication Download PDFInfo
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- CN105472702A CN105472702A CN201410415572.6A CN201410415572A CN105472702A CN 105472702 A CN105472702 A CN 105472702A CN 201410415572 A CN201410415572 A CN 201410415572A CN 105472702 A CN105472702 A CN 105472702A
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Abstract
The invention provides a cell search method and a cell search device in LAA (License Assisted Access) communication. The method comprises steps: 1, a base station sends first signaling indication configuration parameters on a first carrier, wherein the configuration parameters are used for determining first frequency domain resources in an assisted mode or the first frequency domain resources are determined according to a predetermined criterion; and 2, the base station sends a first sequence group for the first frequency domain resources in a first time window on a second carrier. The first carrier is deployed in a licensed spectrum, the second carrier is deployed in a non-licensed spectrum, the first frequency domain resource is a transmission frequency band of the first sequence group in the first time window on the second carrier, and a characteristic sequence indicates a first PCI (Physical Cell Identifier). The first frequency domain resources at least comprise a PRB which is beyond F central PRBs on the second carrier, and F is a positive integer. The scheme of the invention can ensure that UE (User Equipment) can detect PCI conflicts and report the PCI conflicts to other service base stations to prevent inter-cell interference caused by the PCI conflicts. The method is compatible with the existing LTE (Long Term Evolution) protocol as much as possible, and compatibility is good.
Description
Technical field
The present invention relates in wireless communication system the scheme utilizing unlicensed spectrum to communicate, particularly relate to based on LTE (LongTermEvolution, Long Term Evolution) the small region search method communicated for LAA (LicensedAssistedAccess, authorize auxiliary access) 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.
In LAA communication, the base station equipment of multiple operator deployment may transmitting wireless signals on the same frequency band, then share on frequency band and may produce PCI (PhysicalCellIndentifier, Physical Cell Identifier) conflict, namely adjacent base station is configured with identical PCI on shared frequency band, because PCI is used for scrambler and the RS (ReferenceSignal of physical layer data, reference signal) generation of sequence, so PCI conflict may bring serious presence of intercell interference.In LTE system, because PCI is by PSS (PrimarySynchronizationSequence, main synchronizing sequence) and SSS (SecondarySynchronizationSequence, the secondary synchronization sequences) characteristic sequence that forms indicate.If PSS and SSS that two Serving cells (being controlled by two adjacent base stations respectively) being configured with identical PCI send keeps synchronized transmission, then UE (UserEquipment, subscriber equipment) even cannot distinguish two Serving cells.
For the problems referred to above, the invention discloses the small region search method in a kind of LAA communication and device.
Summary of the invention
The invention discloses a kind of method in base station, it is characterized in that, comprise the steps:
-steps A. on first carrier, send the first signaling instruction configuration parameter, described configuration parameter is used for assisting determines the first frequency domain resource; Or determine the first frequency domain resource according to the criterion of pre-determining
The first frequency domain resource in-step B. very first time window on a second carrier sends First ray group.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in characteristic sequence time domain sending K time, and described characteristic sequence is distributed on a continuous print F PRB on frequency domain, and described characteristic sequence instruction the one PCI, a PCI are the PCI that described base station is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
The essence of said method is, in the acentric frequency domain resource of carrier wave, transmission is used to indicate the characteristic sequence of PCI, thus make adjacent base station may in different frequency domain resource transmission feature sequence, even if adjacent base station is configured with identical PCI like this, UE also can detect multiple PCI.
As an embodiment, in very first time window, described characteristic sequence periodically sends, and the described transmission cycle is L subframe, and being sent in each time on frequency domain of described characteristic sequence takies identical frequency band.As an embodiment, described characteristic sequence comprises 1 ZC (ZadOffChu) sequence and 1 pseudo random sequence, described ZC sequence and described pseudo random sequence are at different OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) symbol transmission, described ZC sequence and described pseudo random sequence take identical frequency band, described characteristic sequence is distributed on a continuous print positive integer PRB (PhysicalResourceBlock, Physical Resource Block) on frequency domain.As an embodiment, described characteristic sequence comprises 1 PSS and 1 SSS, a PCI be less than 504 nonnegative integer.As an embodiment, described F is 6.As an embodiment, described K is 1.As an embodiment, the first signaling is high-level signaling.As an embodiment, described L is 5.As an embodiment, described L is 10.As an embodiment, the criterion of described pre-determining is: determine the first frequency domain resource according to the centre frequency of first carrier.As an embodiment of described steps A, first frequency domain resource is mapped by the centre frequency of first carrier determines that (namely described base station does not need to send configuration parameter at first carrier)-due to the frequency that mandate frequency spectrum can be used for centre carrier frequency is greater than the PRB number in the second carrier wave usually, and multiple frequency that can be used for centre carrier frequency may be mapped to identical frequency domain resource.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-step C. receives up signaling and determines that a PCI is identical with the PCI that adjacent base station uses on a second carrier
-step D. sends high-level signaling instruction to be stopped on a second carrier based on the transmission of a PCI.
Described on a second carrier based on a PCI transmission namely: use a PCI to determine the scrambler of downlink physical layer data, use a PCI to generate descending RS sequence.
As an embodiment of step D, described base station sends the while that the PCI of auxiliary community corresponding for the second carrier wave being revised as the 2nd PCI by the first high-level signaling and sends the sequence set being mapped to the 2nd PCI on a second carrier on first carrier, wherein, the 2nd PCI is the PCI outside a PCI.As a sub-embodiment of an embodiment of described step D, high-level signaling described in first comprises following IE (InformationElement, information unit): sCellToAddModList, radioResourceConfigCommonSCell and radioResourceConfigDedicatedSCell.
As another embodiment of step D, described base station sends the second high-level signaling and discharges auxiliary community corresponding to the second carrier wave on first carrier.As a sub-embodiment of another embodiment of described step D, the second high-level signaling comprises sCellToReleaseListIE.
Concrete, according to an aspect of the present invention, it is characterized in that, described step B also comprises the steps:
-step B1. periodically sends First ray group on a second carrier, and the transmission cycle is L*K continuous subframes.
According to above-mentioned aspect, very first time window is a transmission cycle of First ray group.
Concrete, according to an aspect of the present invention, it is characterized in that, First ray group transmission band is on a second carrier relevant with the time-domain position of the affiliated time window of First ray group, and described configuration parameter is used for assisting determines First ray group transmission band on a second carrier.
As an embodiment, the frequency domain of First ray group in time windows is frequency hopping.
As an embodiment, described configuration parameter instruction First ray group is at the SFN (SystemFrameNumber of corresponding first carrier, System Frame Number) be the frequency domain position of the characteristic sequence sent in the frame of 0, frequency hopping adopts the criterion of pre-determining-bind with the center frequency point of first carrier.
As an embodiment, described configuration parameter instruction First ray group is the frequency domain position of the characteristic sequence sent in the frame of 0 at the SFN (SystemFrameNumber, System Frame Number) of corresponding first carrier, and described configuration parameter is indicative of frequency hopping parameter also.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, described K is 4.
Above-mentioned aspect ensure that continuous 4 characteristic sequences take identical frequency domain resource, be conducive to improving UE and detect the robustness of characteristic sequence (if i.e. characteristic sequence adjacent is sent in the saltus step criterion that saltus step on frequency domain and UE cannot determine non-serving base stations for twice, then UE according to once sending detection characteristic sequence, can only may cause false dismissal or false-alarm).
The invention discloses a kind of method in UE, it is characterized in that, comprise the steps:
-steps A. on first carrier, receive the first signaling determination configuration parameter, determine the first frequency domain resource according to described configuration parameter is auxiliary; Or determine the first frequency domain resource according to the criterion of pre-determining
Characteristic sequence is detected in-step B. very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in described characteristic sequence time domain sending K time, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that the transmission base station of the first signaling is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
As an embodiment, the first signaling is high-level signaling.As an embodiment, described characteristic sequence comprises PSS and SSS.As an embodiment, described F is 6.As an embodiment, described K is 1.As an embodiment, the first signaling is high-level signaling.As an embodiment, described L is 5.As an embodiment, described L is 10.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
It is identical with the PCI that adjacent base station uses on a second carrier that-step C. sends up signaling instruction the one PCI
-step D. receives high-level signaling and determines to stop on a second carrier based on the reception of a PCI.
Wherein, the frequency domain resource outside the first frequency domain resource in described UE very first time window on a second carrier detects described characteristic sequence.
As an embodiment of step D, described UE receives the first high-level signaling and determines that the PCI of the auxiliary community that the second carrier wave is corresponding is revised as the 2nd PCI and receives the sequence set being mapped to the 2nd PCI simultaneously on a second carrier on first carrier, wherein, the 2nd PCI is the PCI outside a PCI.
As another embodiment of step D, described UE receives the second high-level signaling and determines that the auxiliary community that the second carrier wave is corresponding is released on first carrier.
Concrete, according to an aspect of the present invention, it is characterized in that, the first frequency domain resource is relevant with the time-domain position of very first time window.
As an embodiment, First ray group is frequency hopping in different time windows.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, described K is 4.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: for sending the first signaling instruction configuration parameter on first carrier, described configuration parameter is used for assisting determines the first frequency domain resource; Or for determining the first frequency domain resource according to the criterion of pre-determining
Second module: send First ray group for the first frequency domain resource in very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in characteristic sequence time domain sending K time, and described characteristic sequence is distributed on a continuous print F PRB on frequency domain, and described characteristic sequence instruction the one PCI, a PCI are the PCI that described base station is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
As an embodiment, the said equipment also comprises:
3rd module: determine that a PCI is identical with the PCI that adjacent base station uses on a second carrier for receiving up signaling
Four module: stop on a second carrier based on the transmission of a PCI for sending high-level signaling instruction.
As an embodiment of above-mentioned four module, the PCI of auxiliary community corresponding for the second carrier wave to be revised as the 2nd PCI and to send for sending the first high-level signaling on first carrier the sequence set being mapped to the 2nd PCI simultaneously on a second carrier by four module, wherein, the 2nd PCI is the PCI outside a PCI.As another embodiment of above-mentioned four module, four module discharges auxiliary community corresponding to the second carrier wave for sending the second high-level signaling on first carrier.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: for receiving the first signaling determination configuration parameter on first carrier, determines the first frequency domain resource according to described configuration parameter is auxiliary; Or determine the first frequency domain resource according to the criterion of pre-determining
Second module: for detecting characteristic sequence in very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in described characteristic sequence time domain sending K time, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that the transmission base station of the first signaling is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
As an embodiment, the said equipment also comprises:
3rd module: identical with the PCI that adjacent base station uses on a second carrier for sending up signaling instruction the one PCI
Four module: determine to stop on a second carrier based on the reception of a PCI for receiving high-level signaling.
Wherein, the frequency domain resource outside the first frequency domain resource in described UE very first time window on a second carrier detects described characteristic sequence.
As an embodiment of above-mentioned four module, for receiving the first high-level signaling on first carrier, four module determines that the PCI of the auxiliary community that the second carrier wave is corresponding is modified to the 2nd PCI and receives the sequence set being mapped to the 2nd PCI simultaneously on a second carrier, wherein, the 2nd PCI is the PCI outside a PCI.As another embodiment of above-mentioned four module, for receiving the second high-level signaling on first carrier, four module determines that the auxiliary community that the second carrier wave is corresponding is released.
For the PCI collision problem in LAA communication, the solution of the present invention makes base station can be used to indicate the characteristic sequence of PCI in the transmission of non-carrier centre frequency.As an embodiment, described characteristic sequence is that frequency hopping sends in different transmitting time windows.The solution of the present invention ensure that UE can detect that PCI conflicts, and then reports its serving BS and to conflict the presence of intercell interference caused to avoid PCI.The compatible as far as possible existing LTE protocol of the present invention, 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 that community PCI according to an embodiment of the invention searches for;
Fig. 2 shows the schematic diagram sent for 1 time that sequence set according to an embodiment of the invention comprises characteristic sequence;
Fig. 3 shows the schematic diagram repeatedly sent that sequence set according to an embodiment of the invention comprises characteristic sequence;
Fig. 4 shows the structured flowchart of the processing unit in base station according to an embodiment of the invention;
Fig. 5 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 the flow chart that community PCI searches for, as shown in Figure 1.In accompanying drawing 1, base station N1 is the serving BS of UEU2, and base station N3 is the adjacent base station of base station N1.
For base station N1, in step slo, first carrier sends the first signaling instruction configuration parameter, described configuration parameter is used for assisting determines the first frequency domain resource; In step s 11, the first frequency domain resource in very first time window on a second carrier sends First ray group; In step s 12, receive up signaling and determine that a PCI is identical with the PCI that adjacent base station uses on a second carrier; In step s 13, send high-level signaling instruction to stop on a second carrier based on the transmission of a PCI.
For base station N3, in step s 30, the 3rd carrier wave sends the 3rd signaling instruction configuration parameter, and described configuration parameter is for auxiliary the second frequency domain resource determining to be positioned on the second carrier wave; In step S31, the second frequency domain resource in very first time window sends the second sequence set.
For UEU2, in step S20, first carrier receives the first signaling determination configuration parameter, determine the first frequency domain resource according to described configuration parameter is auxiliary; In the step s 21, the second frequency domain resource in very first time window on a second carrier detects described characteristic sequence; In step S22, send up signaling instruction the one PCI identical with the PCI that adjacent base station uses on a second carrier; In step S23, receive high-level signaling and determine to stop on a second carrier based on the reception of a PCI.
In embodiment 1, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group and the second sequence set are included in same characteristic sequence time domain sending K time respectively, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that base station N1 is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.The transmission interval of described characteristic sequence is L subframe.The bandwidth of bandwidth sum second carrier wave of the auxiliary community of correspondence second sequence set that base station N3 controls overlaps completely, or partially overlaps.Second frequency domain resource is the frequency domain resource the second carrier wave being not equal to the first frequency domain resource.
As the sub-embodiment 1 of embodiment 1, described K is 1, and described L is 5 or 10.
As the sub-embodiment 2 of embodiment 1, described K is 4, and described L is 5 or 10.
As the sub-embodiment 3 of embodiment 1, described F is 6, and described characteristic sequence comprises a PSS and SSS.
Embodiment 2
Embodiment 2 sequence set illustrated in the present invention comprises the schematic diagram sent for 1 time of characteristic sequence, as shown in Figure 2.In accompanying drawing 2, the running time-frequency resource that oblique line identification characteristics sequence takies.
In embodiment 2, a sequence set comprises the once transmission of characteristic sequence, the base station cycle in fixing frequency domain resource, send characteristic sequence, the transmission cycle is 1 time window (time span of the very first time window namely in embodiment 1).Any one time window in time window respective figure 2 in embodiment 1.
Embodiment 3
Embodiment 3 sequence set illustrated in the present invention comprises the schematic diagram repeatedly sent of characteristic sequence, as shown in Figure 3.In accompanying drawing 3, the running time-frequency resource that oblique line identification characteristics sequence takies.
In embodiment 3, a sequence set comprises characteristic sequence many (for 4 in accompanying drawing 3) secondary transmission in a time window, for a time window, the base station cycle in fixing frequency domain resource, send characteristic sequence.Between different time windows, the resource that described characteristic sequence takies is frequency hopping.Any one time window in time window respective figure 3 in embodiment 1.
Embodiment 4
Embodiment 4 illustrates the structured flowchart of the processing unit in base station, as shown in Figure 4.In accompanying drawing 4, base station processing unit 300 is by sending module 301, and sending module 302, receiver module 303 and sending module 304 form, and wherein receiver module 303 and sending module 304 are optional modules.
Sending module 301 for sending the first signaling instruction configuration parameter on first carrier, and described configuration parameter is used for assisting determines the first frequency domain resource; Or for determining the first frequency domain resource according to the criterion of pre-determining.Sending module 302 sends First ray group for the first frequency domain resource in very first time window on a second carrier.For receiving up signaling, receiver module 303 determines that a PCI is identical with the PCI that adjacent base station uses on a second carrier.Sending module 304 stops on a second carrier based on the transmission of a PCI for sending high-level signaling instruction.
In embodiment 4, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in characteristic sequence time domain sending K time, and described characteristic sequence is distributed on a continuous print F PRB on frequency domain, and described characteristic sequence instruction the one PCI, a PCI are the PCI that described base station is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
As the sub-embodiment 1 of embodiment 4, sending module 302 is also for periodically sending First ray group on a second carrier, and the transmission cycle is L*K continuous subframes.First ray group transmission band is on a second carrier relevant with the time-domain position of the affiliated time window of First ray group, and described configuration parameter is used for assisting determines First ray group transmission band on a second carrier.
Embodiment 5
Embodiment 5 illustrates the structured flowchart of the processing unit in a UE, as shown in Figure 5.In accompanying drawing 5, UE processing unit 400 is by receiver module 401, and receiver module 402, sending module 403 and receiver module 404 form.
Receiver module 401, for receiving the first signaling determination configuration parameter on first carrier, determines the first frequency domain resource according to described configuration parameter is auxiliary; Or determine the first frequency domain resource according to the criterion of pre-determining.Receiver module 402 is for detecting characteristic sequence in very first time window on a second carrier.
In embodiment 5, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in described characteristic sequence time domain sending K time, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that the transmission base station of the first signaling is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
If the frequency domain resource outside the first frequency domain resource in described UE very first time window on a second carrier detects described characteristic sequence:
-sending module 403 is identical with the PCI that adjacent base station uses on a second carrier for sending up signaling instruction the one PCI
-receiver module 404 is determined to stop on a second carrier based on the reception of a PCI for receiving high-level signaling.
Sub-embodiment 1, first frequency domain resource as embodiment 5 is relevant with the time-domain position of very first time window, described K be greater than 1 positive integer.
Have nothing to do as sub-embodiment 2, first frequency domain resource of embodiment 5 and the time-domain position of very first time window, described K is 1.
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 (13)
1. the method in base station, is characterized in that, comprises the steps:
-steps A. on first carrier, send the first signaling instruction configuration parameter, described configuration parameter is used for assisting determines the first frequency domain resource; Or determine the first frequency domain resource according to the criterion of pre-determining
The first frequency domain resource in-step B. very first time window on a second carrier sends First ray group.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in characteristic sequence time domain sending K time, and described characteristic sequence is distributed on a continuous print F PRB on frequency domain, and described characteristic sequence instruction the one PCI, a PCI are the PCI that described base station is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
2. method according to claim 1, is characterized in that, also comprises the steps:
-step C. receives up signaling and determines that a PCI is identical with the PCI that adjacent base station uses on a second carrier
-step D. sends high-level signaling instruction to be stopped on a second carrier based on the transmission of a PCI.
3. method according to claim 1, is characterized in that, described step B also comprises the steps:
-step B1. periodically sends First ray group on a second carrier, and the transmission cycle is L*K continuous subframes.
4. method according to claim 3, it is characterized in that, First ray group transmission band is on a second carrier relevant with the time-domain position of the affiliated time window of First ray group, and described configuration parameter is used for assisting determines First ray group transmission band on a second carrier.
5. method according to claim 4, is characterized in that, described K is 4.
6. the method in UE, is characterized in that, comprises the steps:
-steps A. on first carrier, receive the first signaling determination configuration parameter, determine the first frequency domain resource according to described configuration parameter is auxiliary; Or determine the first frequency domain resource according to the criterion of pre-determining
Characteristic sequence is detected in-step B. very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in described characteristic sequence time domain sending K time, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that the transmission base station of the first signaling is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
7. method according to claim 6, is characterized in that, also comprises the steps:
It is identical with the PCI that adjacent base station uses on a second carrier that-step C. sends up signaling instruction the one PCI
-step D. receives high-level signaling and determines to stop on a second carrier based on the reception of a PCI
Wherein, the frequency domain resource outside the first frequency domain resource in described UE very first time window on a second carrier detects described characteristic sequence.
8. method according to claim 6, is characterized in that, the first frequency domain resource is relevant with the time-domain position of very first time window.
9. method according to claim 8, is characterized in that, described K is 4.
10. a base station equipment, is characterized in that, this equipment comprises:
First module: for sending the first signaling instruction configuration parameter on first carrier, described configuration parameter is used for assisting determines the first frequency domain resource; Or for determining the first frequency domain resource according to the criterion of pre-determining
Second module: send First ray group for the first frequency domain resource in very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in characteristic sequence time domain sending K time, and described characteristic sequence is distributed on a continuous print F PRB on frequency domain, and described characteristic sequence instruction the one PCI, a PCI are the PCI that described base station is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
11. equipment according to claim 10, is characterized in that, this equipment also comprises:
3rd module: determine that a PCI is identical with the PCI that adjacent base station uses on a second carrier for receiving up signaling
Four module: stop on a second carrier based on the transmission of a PCI for sending high-level signaling instruction.
12. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: for receiving the first signaling determination configuration parameter on first carrier, determines the first frequency domain resource according to described configuration parameter is auxiliary; Or determine the first frequency domain resource according to the criterion of pre-determining
Second module: for detecting characteristic sequence in very first time window on a second carrier.
Wherein, first carrier is deployed in mandate frequency spectrum, and the second carrier wave is deployed in unlicensed spectrum, and the first frequency domain resource is the First ray group transmission band on a second carrier in very first time window.First ray group is included in described characteristic sequence time domain sending K time, described characteristic sequence is distributed on a continuous print F PRB on frequency domain, described characteristic sequence instruction the one PCI, a PCI are the PCI that the transmission base station of the first signaling is used on a second carrier.It is PRB on the second carrier wave outside F center PRB that first frequency domain resource at least comprises a PRB, and described K is positive integer, and described F is positive integer.Very first time window comprises L*K continuous subframes, and described L is positive integer.
13. equipment according to claim 12, is characterized in that, this equipment also comprises:
3rd module: identical with the PCI that adjacent base station uses on a second carrier for sending up signaling instruction the one PCI
Four module: determine to stop on a second carrier based on the reception of a PCI for receiving high-level signaling.
Wherein, the frequency domain resource outside the first frequency domain resource in described UE very first time window on a second carrier detects described characteristic sequence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910125594.1A CN109831813B (en) | 2014-08-21 | 2014-08-21 | Cell search method and device in LAA communication |
| CN201410415572.6A CN105472702B (en) | 2014-08-21 | 2014-08-21 | Small region search method and device in LAA communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415572.6A CN105472702B (en) | 2014-08-21 | 2014-08-21 | Small region search method and device in LAA communication |
Related Child Applications (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109831813A (en) | 2019-05-31 |
| CN105472702B (en) | 2019-03-15 |
| CN109831813B (en) | 2020-12-29 |
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