CN105530080B - LAA transmission methods and device in a kind of cellular communication - Google Patents
LAA transmission methods and device in a kind of cellular communication Download PDFInfo
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- CN105530080B CN105530080B CN201410522832.XA CN201410522832A CN105530080B CN 105530080 B CN105530080 B CN 105530080B CN 201410522832 A CN201410522832 A CN 201410522832A CN 105530080 B CN105530080 B CN 105530080B
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Abstract
The present invention proposes LAA transmission methods and device in a kind of cellular communication.Base station is monitored to determine that the present sub-frame in first carrier sends useful signal in step 1 in the first time window of first carrier；Send N number of symbol that useful signal is used for transmission in the present sub-frame of the first signaling instruction first carrier on a second carrier in step 2；Present sub-frame in first carrier in step 3 sends the first useful signal, and the first useful signal takes N number of symbol.The invention enables LTE LAA can keep the fairness identical with Wifi, while make full use of interface-free resources.In addition, the present invention is kept as far as possible and the compatibility of LTE system.
Description
Technical field
The present invention relates to the scheme that unlicensed spectrum communication is utilized in wireless communication system, more particularly to based on LTE
Subframe structure in the unlicensed spectrum (Unlicensed Spectrum) of (Long Term Evolution, Long Term Evolution)
Method and apparatus.
Background technology
Traditional 3GPP (3rd Generation Partner Project, third generation cooperative partner program) LTE system
In, data transfer, which can only occur in, to be authorized on frequency spectrum, however as increased dramatically for portfolio, especially in some urban areas,
Frequency spectrum is authorized to be likely difficult to meet the needs of portfolio.62 plenary sessions of 3GPP RAN discuss a new research topic, i.e.,
The research (RP-132085) of unlicensed spectrum synthesis, main purpose is the dependent of LTE of the research and utilization in unlicensed spectrum
(Non-standalone) dispose, so-called dependent refers to that the communication in unlicensed spectrum and will authorize the service on frequency spectrum small
Area is associated.One intuitively method be as far as possible reuse existing system in CA (Carrier Aggregation, carrier wave gather
Close) concept, that is, be deployed in authorize frequency spectrum on serving cell as PCC (Primary Component Carrier, main load
Ripple), the serving cell in unlicensed spectrum is deployed in as SCC (Secondary Component Carrier, secondary carrier).
In RAN#64 plenary session (seminar), communication in unlicensed spectrum is LAA (License Assisted by Uniform Name
Access, authorizes the access of frequency spectrum auxiliary).In RAN#65 plenary session, LAA is formally set up the project.
Multiple adjacent base stations from different operators may be deployed on identical frequency spectrum, and then are produced serious with frequency
The technologies such as interference, such as LBT (Listen Before Talk, first intercept and send afterwards) can be done between a degree of mitigation base station
Disturb, LBT, that is, base station or UE (User Equipment, user equipment) are first listened in unlicensed spectrum before signal is sent
Power is received, if determining not interfering with source in the unlicensed spectrum according to the reception power, described unauthorized
Signal is sent on frequency spectrum, does not otherwise send signal.
LTE communication mechanism is based on (being made of multiple multicarrier symbols) subframe, i.e., the transmission of one time wireless signal
It can only occur and terminate at " tradition " moment (i.e. the transmission of wireless signal is in units of subframe or in units of symbol
).If LTE transmitters can only be monitored to be confirmed whether to be sent out in the special time window before the particular moment
Send, then a potential unfairness is：It can be monitored at any time to be confirmed whether energy in window with the Wifi equipment in frequency range
Enough it is transmitted and transmission is immediately performed if confirming to send, so as to possesses more send opportunity compared to LTE LAA.
In order to ensure keeping the access chance of (being compared with Wifi) justice in unlicensed spectrum, LTE LAA are likely to same
Wifi equally will compete Radio Resource using the mode of LBE (Load Based Equipment, the equipment based on load), i.e.,
LTE LAA (after monitoring confirmation can launch) can take Radio Resource at any time according to load and send wireless signal.
In view of forward compatibility, whether the subframe timing on LAA carrier waves is likely to the subframe timing on mandate frequency spectrum
It is synchronous (or the offset of associated i.e. step-out is fixed or configurable).LBE is applied to a need in LTE
The problem being discussed is：" tradition " is outside the moment described in corresponding to when the delivery time or end time of LBE on LAA carrier waves
At the time of when, the mapping problems of the wireless signal of LTELAA to physical layer resources.
In view of the above-mentioned problems, the invention discloses LAA transmission methods and device in a kind of cellular communication.
The content of the invention
The invention discloses a kind of method in base station, it is characterised in that includes the following steps：
- step A. monitored in the first time window of first carrier with determine first carrier present sub-frame send it is useful
Signal
- step B. sends in the present sub-frame of the first signaling instruction first carrier and has been used for transmission on a second carrier
With N number of symbol of signal
- step C. sends the first useful signal in the present sub-frame of first carrier, and the first useful signal takes N number of symbol
Number
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate
Frequency spectrum, the N are no more than X and the positive integer not less than X/2.It is normal that the present sub-frame of first carrier is configured as downlink
CP (Cyclic Prefix, cyclic prefix) and the X is 14, or the present sub-frame of first carrier is configured as downlink
It is 12 to extend CP and the X.N number of symbol is continuous in time domain.
The symbol be include CP OFDM (Orthogonal Frequency Division Multiplexing, just
Hand over frequency division multiplexing) symbol either includes SC-FDMA (the Single Carrier Frequency Division of CP
Multiple Access, single-carrier frequency division multiple access) symbol.The essence of the above method is that base station (according to monitoring result) is authorizing
The symbol that the useful signal in physical layer signaling dynamic configuration unlicensed spectrum takes in subframe is sent on frequency spectrum, with fully profit
Use Radio Resource.
As one embodiment, the subframe timing of the subframe timing of first carrier and the second carrier wave is synchronous, the first letter
The transmission subframe of order is the present sub-frame.
As one embodiment, the useful signal includes physical layer data and the corresponding RS for being used for channel estimation
(Reference Signal, reference signal), the RS for channel estimation are DMRS (Demodulation RS, demodulation
) or CRS (Cell RS, cell RS) RS.
As one embodiment, the useful signal include physical layer data and corresponding RS for channel estimation and
For the RS of channel measurement, the RS for channel measurement includes { CSI-RS, IMR (Interference Measurement
Resource, interferometry resource) } in it is one or two kinds of.
As one embodiment, the monitoring includes at least one of { detection receives power, detects characteristic sequence }.Make
For one embodiment, first time window includes K continuous timeslices, and the length of the timeslice is predetermined and not low
In 20us (microsecond, microsecond) or configurable, the K is determined at random when the base station monitors every time, institute
It is positive integer to state K.
Specifically, according to an aspect of the present invention, it is characterised in that N number of symbol is by Y ratio in the first signaling
Refer in particular to show, the Y is less than 4 positive integer.
As one embodiment, the Y bit indicates V kind candidate figure of the N number of symbol in the present sub-frame
One kind in case, the V kinds candidate pattern is configured by high-level signaling, and the V is no more than the positive integer of 2 Y powers.As
The sub- embodiment 1 of the present embodiment, the Y are 1, and the V is 2, and the V kinds candidate pattern corresponds in complete subframe respectively
PDSCH symbols in PDSCH symbols and imperfect subframe.The imperfect subframe refers to have lost part since LBE is inverted
The subframe of PDSCH symbols, it is on the contrary then be complete subframe.The advantages of above-mentioned sub- embodiment 1 is can only to introduce 1 in the first signaling
A bit, reduces the expense of control signaling.But above-mentioned sub- embodiment 1 may introduce new PDSCH subframe structures, such as
Candidate pattern corresponding to imperfect subframe is the rear X/2 symbol of the present sub-frame.
Specifically, according to an aspect of the present invention, it is characterised in that the step B further includes following steps：
- step B0. cycles through characteristic sequence in the second time window of first carrier
Wherein, the initial time of the second time window is compared to the end time delay T1us of first time window, the second time window
End time be N number of symbol previous symbol end time.The T1us be more than or equal to the base station reception/
Send switching time.
As one embodiment, the characteristic sequence is included in { ZC (ZadoffChu) sequence, pseudo-random sequence } at least
It is a kind of.As one embodiment, reception/transmission switching time of the base station is 624Ts, and the Ts is 1/30720 milli
Second.As one embodiment, the second time window is less than the duration of a symbol.
Specifically, according to an aspect of the present invention, it is characterised in that before N number of symbol is the present sub-frame
Non-reserved symbol in M1 symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes that PDSCH can be carried
DwPTS (the Downlink Pilot of (Physical Downlink Shared Channel, Physical Downlink Shared Channel)
Time Slot, descending pilot frequency time slot) in possible symbolic number, the stet is either empty by high-level signaling configuration；
Or N number of symbol is the rear M2 symbol of the present sub-frame, the M2 is an element in Positive Integer Set Z2, institute
State possible symbolic number in PDSCH of the Z2 including normal sub-frames.
Implement profit as one, the stet is the preceding R symbol of the present sub-frame, and the high-level signaling is
Epdcch-StartSymbol IE (Information Element, information unit).
The essence of above-mentioned aspect is to try to reuse the subframe structure of existing PDSCH, avoids since LBE introduces new subframe
Structure (is not excluded for since LAA introduces new PDSCH subframe structures, such as the Z2 further includes the X).As an implementation
Example, the mapping of the first useful signal to physical resource reuse PDSCH in the subframe structure of corresponding PDSCH and for channels
Mappings of the RS of estimation to physical resource.
As one embodiment, the present sub-frame of first carrier be configured as downlink normal CP, the Z1 be 9,
10,11,12 }.As one embodiment, the present sub-frame of first carrier be configured as downbound expansion CP, the Z1 be 8,
9,10 }.
Possible symbolic number is that the X is subtracted for PDCCH (Physical in the PDSCH of the normal sub-frames
Downlink Control Channel, Physical Downlink Control Channel) symbolic number.As one embodiment, if first carries
It is { 13,12,11 } that the present sub-frame of ripple, which is configured as downlink normal CP, the Z2,；If the first carrier is described
It is { 11,10,9 } that present sub-frame, which is configured as downbound expansion CP, the Z2,.As a sub- embodiment of above-described embodiment,
The subframe timing of one carrier wave and the second carrier wave is synchronous, the EPDCCH of the first signaling present sub-frame on a second carrier
Transmitted on (Enhanced PDCCH, the PDCCH of enhancing).As the another sub- embodiment of above-described embodiment, first carrier
Subframe timing is compared to the subframe timing delay special time offset of the association subframe of corresponding second carrier wave, and the first signaling is second
Transmitted on carrier wave on the PDCCH of the association subframe, the special time offset is less than 1ms.
As one embodiment, the Z2 further includes the X.I.e. if the present sub-frame of first carrier is configured as
Downlink normal CP, the Z2 are { 14,13,12,11 }；If the present sub-frame of the first carrier is configured as downlink expansion
CP is opened up, the Z2 is { 12,11,10,9 }.As a sub- embodiment of above-described embodiment, the son of first carrier and the second carrier wave
Frame timing is synchronous, and the first signaling is transmitted on the EPDCCH of the second carrier wave.Another height as above-described embodiment is implemented
Example, the subframe timing of first carrier are deviated compared to the subframe timing delay special time of the association subframe of corresponding second carrier wave,
First signaling is transmitted on the PDCCH of the association subframe on a second carrier, and the special time offset is less than 1ms.
Except reusing existing subframe structure, another advantage of above-mentioned two embodiment is to support first carrier and second
Carrier wave keeps synchronous subframe timing.
Above-described embodiment does not account for the scene-be suitable for 1.25MHz (Mega- that the M2 subtracts 4 equal to the X
Hertz, megahertz) system bandwidth, and 1.25MHz system bandwidths may not be main configuration in unlicensed spectrum.
As one embodiment, the Y is 3 (i.e. described N number of symbol is indicated by 3 bits in the first signaling).The Y
A bit indicates one kind in V1 kind candidate patterns of the N number of symbol in the present sub-frame, the V1 kinds candidate pattern
It is predetermined, the V1 is no more than 4 positive integer, and the V1 kinds candidate pattern is included { in the preceding M1 symbol
Non-reserved symbol (as described above, the M1 includes 3~4 kinds of possibility), the rear M2 symbol is (as described above, the M2 includes 3
~4 kinds of possibility) }.
M2 symbol corresponds to LTE LAA and the initial time once taken of Radio Resource is carried to nearest LAA after described
Symbol between the subframe end time of ripple.The preceding M1 symbol corresponds to the ends that once takes of the LTE LAA to Radio Resource
Symbol between the end time that only the subframe initial time of LAA carrier waves nearest before the moment once takes described in.If
LTE LAA correspond to the end time once taken of Radio Resource the end time of one subframe all the time, then N number of symbol
Number can only be the rear M2 symbol (cannot be the M1 symbol of the present sub-frame) of the present sub-frame.
As one embodiment, the Y is 3.The Y bit indicates N number of symbol in the present sub-frame
One kind in V2 kind candidate patterns, the V2 kinds candidate pattern are predetermined, and the V2 is no more than 8 positive integer, institute
Stating V2 kinds candidate pattern includes { M2 symbol (as described above, the M2 includes 3~4 kinds of possibility) after described }.
As one embodiment, the Y is 3.The Y bit indicates N number of symbol in the present sub-frame
One kind in V3 kind candidate patterns, the V3 kinds candidate pattern are predetermined, and the V3 is no more than 8 positive integer, institute
Stating V3 kinds candidate pattern includes { M2 symbol after described }.The Z2 further includes all integers for meeting following condition：
- is not less than the X/2 and less than the minimum symbolic number in the PDSCH of normal sub-frames.
Without considering the scene of 4 PDCCH symbols, if to be configured as downlink normal for the present sub-frame of first carrier
Minimum symbolic number in CP, the PDSCH of the normal sub-frames is 11, if the present sub-frame of first carrier is configured as down
Minimum symbolic number in row extension CP, the PDSCH of the normal sub-frames is 9.Z2 is { X/2, X/2+ i.e. described in above-described embodiment
1, X/2+2 ..., X-1 } or { X/2, X/2+1, X/2+2 ..., X }.
Above-described embodiment introduces new PDSCH frame structures, its advantage is to support that initial time is the present sub-frame
Previous time slot in optional position downlink send.
Specifically, according to an aspect of the present invention, it is characterised in that N number of symbol is located in the present sub-frame
Same time slot in.
In LTE, a subframe includes 2 time slots, each time slot 0.5ms (millisecond, millisecond).As a reality
Apply example, special son when the first useful signal configures 1 to the mapping of physical resource in the same time slot using special subframe
Downlink signal in the previous time slot of frame and for channel estimation RS to physical resource mapping.
Specifically, according to an aspect of the present invention, it is characterised in that the first signaling is the scheduling letter of the first useful signal
Order.
As one embodiment, the first signaling is DCI (Downlink Control Information, downlink control letter
Breath) one kind in form { 1,1A, 1B, 1C, 1D, 2,2A, 2B, 2C, 2D }.That is LAA carrier waves support CRS and DMRS at the same time.
As one embodiment, the subframe timing of first carrier and the second carrier wave is synchronous, and the first signaling is carried second
Transmitted on the EPDCCH of ripple.
Specifically, according to an aspect of the present invention, it is characterised in that the first signaling is to be located at CSS (Common
Search Space, public search space) and by the public RNTI of cell (Radio Network Temporary
Identifier, wireless network fix tentatively identity) mark signaling.
As one embodiment, the cell common signaling is configured by high-level signaling.As one embodiment, the first signaling
Include G group configuration informations, wherein the g groups configuration information IgIncluding carrier index CgWith notation index Sg, the SgBe
The CgThe symbol that useful signal takes in the present sub-frame on the carrier wave of index, the G is positive integer, and the g is 1 to arrive
The positive integer of the G.
As one embodiment, the subframe timing of first carrier is specific compared to the subframe timing delay of associated second carrier wave
Time migration, the first signaling are transmitted on the PDCCH of the second carrier wave.The special time offset is fixed or configurable
's.
In above-described embodiment, the index of first carrier and N number of symbol correspond to one in the G groups configuration information
Group.
As one embodiment, the payload size of the first signaling is equal to the scheduling first that is used for sent on a second carrier and carries
The payload size of the DCI format { 1A } of ripple.
The invention discloses a kind of method in UE, it is characterised in that includes the following steps：
- step A. receives the first signaling and determines to be used for transmission useful letter in the present sub-frame of first carrier on a second carrier
Number N number of symbol
- step B. receives the first useful signal in the present sub-frame of first carrier, and the first useful signal takes the N
A symbol
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate
Frequency spectrum, the N are no more than X and the positive integer not less than X/2.It is normal that the present sub-frame of first carrier is configured as downlink
The CP and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.It is described N number of
Symbol is continuous in time domain.
Specifically, according to an aspect of the present invention, it is characterised in that N number of symbol is by Y ratio in the first signaling
Refer in particular to show, the Y is less than 4 positive integer.
As one embodiment, the Y bit indicates V kind candidate figure of the N number of symbol in the present sub-frame
One kind in case, the V kinds candidate pattern is pre-determining, and the V is no more than the positive integer of 2 Y powers.
Specifically, according to an aspect of the present invention, it is characterised in that the step A further includes following steps：
- step A0. receives the characteristic sequence cycled through in the second time window of first carrier
Wherein, the initial time of the second time window is compared to the end time delay T1us of first time window, the second time window
End time be N number of symbol previous symbol end time.The T1us be more than or equal to the base station reception/
Send switching time.
As one embodiment, the characteristic sequence includes at least one of { ZC sequences, pseudo-random sequence }.As one
A embodiment, the UE aid in performing at least one of according to the characteristic sequence：
- adjustment AGC (Automatic Gain Control, automatic growth control)
- down-going synchronous.
Specifically, according to an aspect of the present invention, it is characterised in that before N number of symbol is the present sub-frame
Non-reserved symbol in M1 symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes that PDSCH can be carried
DwPTS in possible symbolic number, the stet is either empty by high-level signaling configuration；Or N number of symbol
It is the rear M2 symbol of the present sub-frame, the M2 is an element in Positive Integer Set Z2, and the Z2 includes normal-sub
Possible symbolic number in the PDSCH of frame.
Specifically, according to an aspect of the present invention, it is characterised in that N number of symbol is located in the present sub-frame
Same time slot in.
Specifically, according to an aspect of the present invention, it is characterised in that the first signaling is the scheduling letter of the first useful signal
Order.
Specifically, according to an aspect of the present invention, it is characterised in that the first signaling is positioned at CSS and public by cell
The signaling of RNTI marks.
As one embodiment, the payload size of the first signaling is equal to the scheduling first that is used for sent on a second carrier and carries
The payload size of the DCI format { 1C } of ripple.
As one embodiment, the first signaling is one kind in DCI { 2B, 2C, 2D }.That is LAA carrier waves only support DMRS.
The invention discloses a kind of base station equipment, it is characterised in that the equipment includes：
First module：For monitoring the present sub-frame hair to determine in first carrier in the first time window of first carrier
Send useful signal
Second module：It is used in the present sub-frame for sending the first signaling instruction first carrier on a second carrier
Transmit N number of symbol of useful signal
3rd module：For sending the first useful signal in the present sub-frame of first carrier, the first useful signal takes institute
State N number of symbol
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate
Frequency spectrum, the N are no more than X and the positive integer not less than X/2.It is normal that the present sub-frame of first carrier is configured as downlink
The CP and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.It is described N number of
Symbol is continuous in time domain.
As one embodiment, the said equipment is characterized in that, N number of symbol is the preceding M1 symbol of the present sub-frame
Non-reserved symbol in number, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
As one embodiment, the said equipment is characterized in that, N number of symbol is refered in particular to by Y ratio in the first signaling
Show, the Y is less than 4 positive integer.
As one embodiment, the second module is additionally operable to cycle through feature sequence in the second time window of first carrier
Row.Wherein, the initial time of the second time window is compared to the end time delay T1us of first time window, the termination of the second time window
Moment is the end time of the previous symbol of N number of symbol.Reception/transmission that the T1us is more than or equal to the base station is cut
Change the time.
The invention discloses a kind of user equipment, it is characterised in that the equipment includes：
First module：Determine to be used for transmission in the present sub-frame of first carrier for receiving the first signaling on a second carrier
N number of symbol of useful signal
Second module：The first useful signal is received for the present sub-frame in first carrier, the first useful signal accounts for
With N number of symbol
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate
Frequency spectrum, the N are no more than X and the positive integer not less than X/2.It is normal that the present sub-frame of first carrier is configured as downlink
The CP and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.It is described N number of
Symbol is continuous in time domain.
As one embodiment, the said equipment is characterized in that, N number of symbol is the preceding M1 symbol of the present sub-frame
Non-reserved symbol in number, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
As one embodiment, the said equipment is characterized in that, N number of symbol is refered in particular to by Y ratio in the first signaling
Show, the Y is less than 4 positive integer.
As one embodiment, the first module is additionally operable to receive the spy cycled through in the second time window of first carrier
Levy sequence.Wherein, the initial time of the second time window postpones T1us compared to the end time of first time window, the second time window
End time is the end time of the previous symbol of N number of symbol.The T1us is transmitted/received more than or equal to connecing for the base station
Send switching time.
LTE LAA can cause the transmitting-receiving moment of wireless signal incompatible when using LBE the problem of.For this problem, sheet
Invent in the scheme proposed, the symbol shared by useful signal in the dynamic instruction present sub-frame of base station.As one embodiment,
The solution of the present invention has reused the PDSCH subframe structures of existing LTE, i.e., does not introduce new PDSCH subframe structures because of LBE.This
Invention enables LTE LAA to keep the fairness identical with Wifi, while makes full use of interface-free resources.In addition, the present invention to the greatest extent may be used
It can keep the compatibility with LTE system.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is other
Feature, objects and advantages will become more apparent：
Fig. 1 shows downlink transfer flow chart according to an embodiment of the invention；
Fig. 2 shows the sequence diagram of the LBT according to an embodiment of the invention based on LBE；
Fig. 3 shows useful signal according to an embodiment of the invention to the mapping schematic diagram of physical resource；
Fig. 4 shows the structure diagram of the processing unit in base station according to an embodiment of the invention；
Fig. 5 shows the structure diagram of the processing unit in UE according to an embodiment of the invention；
Embodiment
Technical scheme is described in further detail below in conjunction with attached drawing, it is necessary to explanation is, do not rushed
In the case of prominent, the feature in embodiments herein and embodiment can be arbitrarily mutually combined.
Embodiment 1
Embodiment 1 illustrates downlink transfer flow chart, as shown in Figure 1.In attached drawing 1, base station N1 is the service base of UE U2
Stand.
For base station N1, in step s 11, monitored in the first time window of first carrier to determine in first carrier
Present sub-frame sends useful signal；In step s 12, described the working as of the first signaling instruction first carrier is sent on a second carrier
N number of symbol of useful signal is used for transmission in preceding subframe；In step s 13, have in the present sub-frame transmission first of first carrier
With signal, the first useful signal takes N number of symbol.
For UE U2, in the step s 21, the present sub-frame that the first signaling determines first carrier is received on a second carrier
In be used for transmission N number of symbol of useful signal；In step S22, it is useful to receive first in the present sub-frame of first carrier
Signal.
In embodiment 1, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, the deployment of the second carrier wave
In authorizing frequency spectrum, the N is no more than X and the positive integer not less than X/2.The present sub-frame of first carrier is configured as down
The normal CP of the row and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.
N number of symbol is continuous in time domain.First signaling is transmitted in the present sub-frame.
As the sub- embodiment 1 of embodiment 1, N number of symbol is the non-guarantor in the preceding M1 symbol of the present sub-frame
Symbol is stayed, the M1 is an element in Positive Integer Set Z1, and the Z1 is possible in the DwPTS including that can carry PDSCH
Symbolic number, the stet are either empty by high-level signaling configuration；Or N number of symbol is the present sub-frame
M2 symbol afterwards, the M2 are an elements in Positive Integer Set Z2, and the Z2 is possible in the PDSCH including normal sub-frames
Symbolic number.N number of symbol is indicated by 2 bits in the first signaling, or N number of symbol is by 3 in the first signaling
Bit indicates.
As the sub- embodiment 2 of embodiment 1, N number of symbol is located in the same time slot in the present sub-frame.Institute
State N number of symbol and indicate that the same time slot is the latter time slot of the present sub-frame by 1 bit in the first signaling.
As the sub- embodiment 3 of embodiment 1, the first signaling is the dispatch of the first useful signal.
As the sub- embodiment 4 of embodiment 1, the first signaling is positioned at CSS and by the signaling of the public RNTI marks of cell.
As the sub- embodiment 5 of embodiment 1, N number of symbol indicates that the Y is small by Y bit in the first signaling
In 4 positive integer, the Y bit indicates one kind in V kind candidate patterns of the N number of symbol in the present sub-frame,
The V kinds candidate pattern is configured by high-level signaling, and the V is no more than the positive integer of 2 Y powers.
Embodiment 2
Embodiment 2 illustrates the sequence diagram of the LBT based on LBE, as shown in Figure 2.In attached drawing 2, when oblique line identifies first
Between window, backslash identify the second time window, cross spider identify useful signal transfer resource.
Base station is monitored first in the first time window of first carrier to determine that the present sub-frame transmission in first carrier has
Use signal；Then the first signaling is sent on a second carrier to be used for transmission into the present sub-frame of UE instruction first carriers
With N number of symbol of signal；Finally the first useful signal is sent to UE, the first useful signal in the present sub-frame of first carrier
Take N number of symbol.
In embodiment 2, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, the deployment of the second carrier wave
In authorizing frequency spectrum, the N is no more than X and the positive integer not less than X/2.The present sub-frame of first carrier is configured as down
The normal CP of the row and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.
N number of symbol is continuous in time domain.The subframe timing of the subframe timing of first carrier and the second carrier wave is synchronous.
As the sub- embodiment 1 of embodiment 2, the present sub-frame is the first subframe in attached drawing 2, and N number of symbol is
The rear M2 symbol (the cross spider mark in such as the first subframe) of the present sub-frame, the M2 is one in Positive Integer Set Z2
A element, possible symbolic number in the PDSCH of the Z2 including normal sub-frames.First signaling is uploaded in the EPDCCH of the first subframe
It is defeated (to be transmitted on PDCCH, because base station cannot determine whether to send the first useful letter in the initial time of the first subframe
Number).
As the sub- embodiment 2 of embodiment 2, four-headed arrow AR1 indicates that once occupancy of the base station on first carrier is covered
The time range (from the t_1 moment to the t_2 moment) of lid, the present sub-frame are the second subframes in attached drawing 2, N number of symbol
It is the preceding M1 symbol (the cross spider mark in such as the second subframe) of the present sub-frame, the M1 is in Positive Integer Set Z1
One element, the Z1 include that possible symbolic number in the DwPTS of PDSCH can be carried.First signaling is in the second subframe
EPDCCH or PDCCH transmission.
As the sub- embodiment 3 of embodiment 2, the base station cycles through L+1 times in the second time window of first carrier
Characteristic sequence (with the addition of the oblique line mark of numeral, wherein the L+1 times sends by truncation) in such as attached drawing 2.Wherein, the second time window
Initial time compared to first time window end time delay T1us, the end time of the second time window is N number of symbol
Previous symbol end time i.e. the second time window and N number of symbol be continuous.The T1us is more than or equal to described
The reception of base station/transmission switching time.
Embodiment 3
Embodiment 3 is illustrated in a PRBP (Physical Resource Block Pair, Physical Resource Block to)
Useful signal to physical resource mapping schematic diagram, as shown in Figure 3.In attached drawing 3, cross spider mark DMRS, oblique line mark
CSI-RS, thick line mark CRS, blank mark PDSCH, the grid of backslash mark is the symbol that cannot be used for transmission useful signal
Number.
Present sub-frame of the base station on the carrier wave of unlicensed spectrum sends useful signal, and the useful signal takes N number of symbol
Number, the present sub-frame is configured as normal CP.
As the sub- embodiment 1 of embodiment 3, N number of symbol is the rear M2 symbol of the present sub-frame, and the M2 is
An element in Positive Integer Set Z2, the Z2 include { 11,12,13,14 }.The useful signal includes PDSCH, DMRS,
CSI-RS, wherein, DMRS and CSI-RS reuse the physical resource mapping scheme of existing LTE completely, and when M2 is not 14, PDSCH is complete
The physical resource mapping scheme of the existing LTE of full weight, first sign-ons of the PDSCH from the present sub-frame when M2 is 14
Mapping, other reuse the respective physical resource impact scheme of existing LTE.Attached drawing 3 (a) illustrates the scene that M2 is 11.
As the sub- embodiment 2 of embodiment 3, N number of symbol is the rear M2 symbol of the present sub-frame, and the M2 is
7, the useful signal includes PDSCH, DMRS, wherein, special subframe exists when DMRS reuses special subframe configuration 1 in existing LTE
DMRS physical resource mapping schemes in previous time slot, as shown in attached drawing 3 (b).
As the sub- embodiment 3 of embodiment 3, N number of symbol is the preceding M1 symbol of the present sub-frame, and the M1 is
An element in Positive Integer Set Z1, the Z1 include { 9,10,11,12 }.The useful signal includes PDSCH, CRS,
CSI-RS, the mapping of the useful signal to physical resource reuse corresponding mapping scheme in existing LTE.Attached drawing 3 (c) illustrates
M1 is 10 scene.
As the sub- embodiment 4 of embodiment 3, N number of symbol is the non-guarantor in the preceding M1 symbol of the present sub-frame
Symbol is stayed, the M1 is an element in Positive Integer Set Z1, and the Z1 includes { 9,10,11,12 }, and the stet is
By high-level signaling configuration.The useful signal includes PDSCH, DMRS, and the mapping of the useful signal to physical resource reuses
Existing LTE includes the corresponding downlink signal mapping scheme in the DwPTS of M1 symbol.It is 11 that attached drawing 3 (d), which illustrates M1,
The stet is the scene of preceding 2 symbols of the present sub-frame.
Embodiment 4
Embodiment 4 illustrates the structure diagram of the processing unit in base station, as shown in Figure 4.In attached drawing 4, processing unit
400 are made of monitoring modular 401, sending module 402 and sending module 403.
Monitoring modular 401 is used to monitor to determine the present sub-frame in first carrier in the first time window of first carrier
Send useful signal；Sending module 402 is used for the current son for sending the first signaling instruction first carrier on a second carrier
N number of symbol of useful signal is used for transmission in frame；Sending module 403 is useful for sending first in the present sub-frame of first carrier
Signal, the first useful signal take N number of symbol.
In embodiment 4, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, the deployment of the second carrier wave
In authorizing frequency spectrum, the N is no more than X and the positive integer not less than X/2.The present sub-frame of first carrier is configured as down
The normal CP of the row and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.
N number of symbol is continuous in time domain.The subframe timing of the subframe timing of first carrier and the second carrier wave is synchronous and
One signaling is transmitted in the present sub-frame, or the subframe timing of the subframe timing of first carrier and the second carrier wave be it is associated and
First signaling the present sub-frame the second carrier wave association sub-frame transmission.
As the sub- embodiment 1 of embodiment 4, N number of symbol is the non-guarantor in the preceding M1 symbol of the present sub-frame
Symbol is stayed, the M1 is an element in Positive Integer Set Z1, and the Z1 is possible in the DwPTS including that can carry PDSCH
Symbolic number, the stet are either empty by high-level signaling configuration；Or N number of symbol is the present sub-frame
M2 symbol afterwards, the M2 are an elements in Positive Integer Set Z2, and the Z2 is possible in the PDSCH including normal sub-frames
Symbolic number.
As the sub- embodiment 2 of embodiment 4, sending module 402 is additionally operable to circulate in the second time window of first carrier
Send characteristic sequence.Wherein, the initial time of the second time window compared to first time window end time delay T1us, when second
Between window end time be N number of symbol previous symbol end time.The T1us is more than or equal to the base station
Reception/transmission switching time.
Embodiment 5
Embodiment 5 illustrates the structure diagram of the processing unit in UE, as shown in Figure 5.In attached drawing 5, processing unit 500
It is made of receiving module 501 and receiving module 502.
Receiving module 501 determines to be used to pass in the present sub-frame of first carrier for receiving the first signaling on a second carrier
N number of symbol of defeated useful signal；Receiving module 502 is used to receive the first useful signal in the present sub-frame of first carrier,
First useful signal takes N number of symbol.
In embodiment 5, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, the deployment of the second carrier wave
In authorizing frequency spectrum, the N is no more than X and the positive integer not less than X/2.The present sub-frame of first carrier is configured as down
The normal CP of the row and X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier.
N number of symbol is continuous in time domain.The subframe timing of the subframe timing of first carrier and the second carrier wave is synchronous and
One signaling is transmitted in the present sub-frame, or the subframe timing of the subframe timing of first carrier and the second carrier wave be it is associated and
First signaling the present sub-frame the second carrier wave association sub-frame transmission.
As the sub- embodiment 1 of embodiment 5, N number of symbol indicates that the Y is small by Y bit in the first signaling
In 4 positive integer.
As the sub- embodiment 2 of embodiment 5, the first signaling is the dispatch of the first useful signal.
As the sub- embodiment 3 of embodiment 5, the first signaling is positioned at CSS and by the signaling of the public RNTI marks of cell.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be referred to by program
Related hardware is made to complete, described program can be stored in computer-readable recording medium, such as read-only storage, hard disk or light
Disk etc..Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuit.Phase
Answer, each modular unit in above-described embodiment, example, in hardware can be used to realize, can also be by the form of software function module
Realize, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification for being made, equivalent substitution, improve etc., it should be included in the protection of the present invention
Within the scope of.
Claims (16)
1. a kind of method in base station, it is characterised in that include the following steps：
- step A. is monitored in the first time window of first carrier to determine that the present sub-frame in first carrier sends useful letter
Number；
- step B. sends in the present sub-frame of the first signaling instruction first carrier and is used for transmission useful letter on a second carrier
Number N number of symbol；
- step C. sends the first useful signal in the present sub-frame of first carrier, and the first useful signal takes N number of symbol；
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate frequency
Spectrum, the N are no more than X and the positive integer not less than X/2；The present sub-frame of first carrier is configured as the normal CP of downlink
And the X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier；N number of symbol
Number it is continuous in time domain.
2. according to the method described in claim 1, it is characterized in that, N number of symbol is refered in particular to by Y ratio in the first signaling
Show, the Y is less than 4 positive integer.
3. according to the method described in claim 1, it is characterized in that, the step B further includes following steps：
- step B0. cycles through characteristic sequence in the second time window of first carrier；
Wherein, the initial time of the second time window is compared to the end time delay T1us of first time window, the end of the second time window
Only the moment is the end time of the previous symbol of N number of symbol；The T1us is more than or equal to reception/transmission of the base station
Switching time.
4. method according to claim 1 or 2, it is characterised in that N number of symbol is preceding M1 of the present sub-frame
Non-reserved symbol in symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
5. method according to claim 1 or 2, it is characterised in that N number of symbol is located at same in the present sub-frame
In one time slot.
6. the method according to any claim in claims 1 to 3, it is characterised in that the first signaling is first useful
The dispatch of signal, or the first signaling are positioned at CSS and by the signaling of the public RNTI marks of cell.
7. a kind of method in UE, it is characterised in that include the following steps：
- step A. receives the first signaling and determines to be used for transmission useful signal in the present sub-frame of first carrier on a second carrier
N number of symbol；
- step B. receives the first useful signal in the present sub-frame of first carrier, and the first useful signal takes N number of symbol
Number；
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate frequency
Spectrum, the N are no more than X and the positive integer not less than X/2；The present sub-frame of first carrier is configured as the normal CP of downlink
And the X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier；N number of symbol
Number it is continuous in time domain.
8. the method according to the description of claim 7 is characterized in that N number of symbol is refered in particular to by Y ratio in the first signaling
Show, the Y is less than 4 positive integer.
9. the method according to the description of claim 7 is characterized in that the step A further includes following steps：
- step A0. receives the characteristic sequence cycled through in the second time window of first carrier；
Wherein, the initial time of the second time window is compared to the end time delay T1us of first time window, the end of the second time window
Only the moment is the end time of the previous symbol of N number of symbol；The T1us is more than or equal to reception/transmission of the base station
Switching time.
10. the method according to claim 7 or 8, it is characterised in that N number of symbol is the preceding M1 of the present sub-frame
Non-reserved symbol in a symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
11. the method according to claim 7 or 8, it is characterised in that N number of symbol is located in the present sub-frame
In same time slot.
12. the method according to any claim in claim 7 to 9, it is characterised in that the first signaling is first useful
The dispatch of signal, or the first signaling are positioned at CSS and by the signaling of the public RNTI marks of cell.
13. a kind of base station equipment, it is characterised in that the equipment includes：
First module：For in the first time window of first carrier monitor with determine first carrier present sub-frame send have
Use signal；
Second module：It is used for transmission in the present sub-frame for sending the first signaling instruction first carrier on a second carrier
N number of symbol of useful signal；
3rd module：For sending the first useful signal in the present sub-frame of first carrier, the first useful signal takes described N number of
Symbol；
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate frequency
Spectrum, the N are no more than X and the positive integer not less than X/2；The present sub-frame of first carrier is configured as the normal CP of downlink
And the X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier；N number of symbol
Number it is continuous in time domain.
14. equipment according to claim 13, it is characterised in that N number of symbol is preceding M1 of the present sub-frame
Non-reserved symbol in symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
15. a kind of user equipment, it is characterised in that the equipment includes：
First module：Determine to be used for transmission in the present sub-frame of first carrier for receiving the first signaling on a second carrier useful
N number of symbol of signal；
Second module：For receiving the first useful signal in the present sub-frame of first carrier, the first useful signal takes institute
State N number of symbol；
Wherein, the first signaling is physical layer signaling, and first carrier is deployed in unlicensed spectrum, and the second carrier wave is deployed in mandate frequency
Spectrum, the N are no more than X and the positive integer not less than X/2；The present sub-frame of first carrier is configured as the normal CP of downlink
And the X is 14, or to be configured as downbound expansion CP and the X be 12 to the present sub-frame of first carrier；N number of symbol
Number it is continuous in time domain.
16. equipment according to claim 15, it is characterised in that N number of symbol is preceding M1 of the present sub-frame
Non-reserved symbol in symbol, the M1 are an elements in Positive Integer Set Z1, and the Z1 includes to carry PDSCH's
Possible symbolic number in DwPTS, the stet are either empty by high-level signaling configuration；Or N number of symbol is
The rear M2 symbol of the present sub-frame, the M2 are an elements in Positive Integer Set Z2, and the Z2 includes normal sub-frames
PDSCH in possible symbolic number.
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| CN201410522832.XA CN105530080B (en) | 2014-09-30 | 2014-09-30 | LAA transmission methods and device in a kind of cellular communication |
| PCT/CN2015/091015 WO2016050196A2 (en) | 2014-09-30 | 2015-09-29 | Base station for laa transmission in cellular communications, method and device for ue |
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| CN201410522832.XA CN105530080B (en) | 2014-09-30 | 2014-09-30 | LAA transmission methods and device in a kind of cellular communication |
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| US10512033B2 (en) * | 2015-01-29 | 2019-12-17 | Qualcomm Incorporated | Timing information for discovery in unlicensed spectrum |
| CN107396442B (en) * | 2016-05-15 | 2019-10-01 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in wireless communication |
| CN114845415A (en) * | 2016-06-06 | 2022-08-02 | 北京三星通信技术研究有限公司 | Uplink signal sending method and user equipment |
| CN107787005B (en) * | 2016-08-26 | 2023-04-07 | 北京三星通信技术研究有限公司 | Method for monitoring link quality and corresponding user equipment |
| CN108123782B (en) | 2016-11-27 | 2020-11-06 | 上海朗帛通信技术有限公司 | Method and device in wireless communication |
| CN111405674B (en) | 2016-12-09 | 2023-05-26 | 上海朗帛通信技术有限公司 | Method and equipment in UE and base station |
| CN109997402A (en) * | 2017-06-26 | 2019-07-09 | 华为技术有限公司 | A kind of sending method and equipment of the upstream data based on authorization auxiliary access system |
| US10805980B2 (en) | 2017-06-29 | 2020-10-13 | Qualcomm Incorporated | Dynamic reclamation of resources reserved for forward compatibility |
| CN112600653A (en) * | 2017-08-11 | 2021-04-02 | 上海朗帛通信技术有限公司 | Method and device in user equipment and base station for wireless communication |
| CN111586871B (en) | 2018-02-13 | 2022-11-25 | 上海朗帛通信技术有限公司 | Method and device in communication node for wireless communication |
| CN115665873A (en) * | 2018-06-11 | 2023-01-31 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN112189363A (en) * | 2019-05-03 | 2021-01-05 | 联发科技股份有限公司 | Physical downlink control channel monitoring |
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| WO2010044632A3 (en) * | 2008-10-15 | 2010-07-15 | 엘지전자주식회사 | Communications method and device in a multi-carrier system |
| US8626219B2 (en) * | 2010-02-16 | 2014-01-07 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving data over carrier component in a multi-carrier mobile communication system |
| CN103687032A (en) * | 2012-09-24 | 2014-03-26 | 电信科学技术研究院 | Method for selecting main carrier and device |
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