CN105991265B - Auxiliarily implement the method for aperiodicity reference signal transmission based on leader sequence - Google Patents
Auxiliarily implement the method for aperiodicity reference signal transmission based on leader sequence Download PDFInfo
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- CN105991265B CN105991265B CN201510059283.1A CN201510059283A CN105991265B CN 105991265 B CN105991265 B CN 105991265B CN 201510059283 A CN201510059283 A CN 201510059283A CN 105991265 B CN105991265 B CN 105991265B
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Abstract
The present invention relates to a kind of in the base station of wireless communication system for auxiliarily implementing the method for aperiodicity reference signal transmission based on leader sequence on unauthorized carrier wave, the described method includes: the first part for configuring the specific orthogonal sequence pond of cell for the base station and selecting the specific orthogonal sequence of first community with the first index as the leader sequence from the specific orthogonal sequence pond of the cell, wherein, the first index instruction occupies the first base station of the unauthorized carrier wave after the leader sequence and indicates the first information associated with the transmission after the leader sequence.In addition, the present invention relates to a kind of in the user equipment of wireless communication system for auxiliarily implementing the method for aperiodicity reference signal transmission based on leader sequence on unauthorized carrier wave.Method according to the present invention, which can meet, first listens to rear transmission rule requirement, and realizes that aperiodicity reference signal is quick, efficient and reliable transmission.
Description
Technical field
The present invention relates to wireless communication techniques, and in particular, to uses in the base station of wireless communication system and user equipment
In the method for auxiliarily implementing aperiodicity reference signal transmission based on leader sequence on unauthorized carrier wave.
Background technique
The new research item (SI) about unauthorized auxiliary access LTE (LAA-LTE) is had approved among RAN#65 meeting,
The research item is by LTE system platform from authorization spread spectrum to unlicensed spectrum.It is well known that such as PSS/SSS, CRS, CSI-
The transmission of the reference signals such as RS is for thick synchronization, time and frequency-tracking, CSI and the RRM among some basic functions such as LTE
Most important for measurement, these should equally be ensured among LAA-LTE system.For LAA-LTE, version 12
Discovery reference signal (DRS:Discovery Reference Signal) include at least for small cell physical layer enhancing and
The PSS/SSS/CRS of design, therefore the discovery reference signal can be considered the discovery of the cell on unlicensed band, channel
The starting point of the researchs such as tracking and RRM measurement.
However, first listening to the discontinuous transmission transmitted on (LBT:Listen-Before-Talk) and LBT cell afterwards
Combination so that it cannot be guaranteed that the cyclical transmission of the discovery reference signal (U-DRS) on unauthorized carrier wave.In order to overcome
The problem of periodic reference signal, a kind of method are using short control message mechanism without the detecting when there are other signals
Channel.As shown in Figure 1, the discovery reference signal U-DRS in Fig. 1 on the unauthorized carrier wave of every 80ms transmission primaries 1ms.
But short control message is due to the fact that be not particularly suited for the periodic reference among LAA-LTE system
Signal, this is because:
Firstly, short control message mechanism is not the shared solution in the whole world, because it is only advised in Europe as LBT
A part then and be allowed to, but be not approved as a part of LBT rule in other such as Japanese areas；
Secondly, if the short control that the reference signal with longer duration is detected as no clear channel assessment (CCA) disappears
Breath is transmitted, which may interfere with the transmission from other adjacent nodes and also can be by other adjacent node institutes
Interference.
If the letter of the periodic reference on unauthorized carrier wave cannot be transmitted on certain time points due to LBT rule
Number (U-RS), then it can be considered that transmission and survey of the acyclic opportunity for the reference signal U-RS on unauthorized carrier wave
Amount.One of acyclic method is that the main plot PCell of authorization is capable of providing some auxiliary to promote in LAA cell
On corresponding synchronous and measurement.However, losing synchronous, time/frequency and channel tracking use among the solution
Family equipment is merely capable of to receive on unauthorized carrier wave after having received the instruction of L1 signaling at the main plot from authorization
Reference signal U-RS.Since these user equipmenies can correctly connect after having received the reference signal on unauthorized carrier wave
Receive and decode the data from its service node, thus from clear channel assessment (CCA) detect time point to the user equipment under
Success may be just wasted, from the resource between the time point that main plot receives L1 signaling in addition, source among one subframe
The L1 signaling of autonomous cell PCell will bring signaling overheads and be not useable for unauthorized carrier wave separate transmission mode.
For the solution of the transmission of the aperiodicity discovery reference signal assisted by authorization carrier wave main plot PCell
For, as shown in Fig. 2, the discovery reference signal U-DRS on unauthorized carrier wave can be obtained after L1 signalling earliest
With transmission, Fig. 2 shows the schematic diagrames of the aperiodicity U-DRS transmission on unauthorized carrier wave.From figure 2 it can be seen that
It is assumed that the OFDM symbol number of the Physical Downlink Control Channel for authorizing main plot PCell is three, then U-DRS such as Fig. 2 institute
Showing can transmit earliest from the 4th sign-on of third subframe.If the base station has, data are transmitted and it loses
It is synchronous with user equipment that it is serviced, then the base station is only capable of transmitting number from the 4th sign-on of the 4th subframe
According to.So the resource of the transmission for leader sequence just wastes.In addition, the L1 signaling from main plot PCell will be with letter
It enables expense and is not useable for unauthorized carrier wave separate transmission mode.
Summary of the invention
In order to overcome disadvantages described above, a kind of alternative is the unauthorized carrier wave of aperiodicity based on leader sequence auxiliary
On reference signal transmission, so as to rapidly not be originated from main plot PCell additional signaling overheads before
Put the transmission for implementing the reference signal on unauthorized carrier wave.
The first aspect of the present invention propose it is a kind of in the base station of wireless communication system on unauthorized carrier wave base
Auxiliarily implement the method for aperiodicity reference signal transmission in leader sequence, which comprises
The specific orthogonal sequence pond of cell is configured for the base station；And
Selection has the specific orthogonal sequence of first community of the first index from the cell specific orthogonal sequence pond
As the first part of the leader sequence,
Wherein, the first index instruction occupies the first base station of the unauthorized carrier wave simultaneously after the leader sequence
And the instruction first information associated with the transmission after the leader sequence.
With the solution phase of the aperiodicity discovery reference signal DRS transmission assisted by the main plot PCell authorized
Than the solution of method according to the present invention can be after obtaining corresponding channel as the base station of transmitter quickly non-
The transmission that aperiodicity reference signal U-RS is carried out on carrier wave is authorized, to avoid the wasting of resources and maximize related resource
Utilization.Although proposed solution will will increase the complexity of the detection leader sequence of user equipment side, in this way
Solution and be not introduced into such as main plot PCell auxiliary additional signaling overheads.Furthermore the side according to the present invention
Method can also apply to the independent transmission of unauthorized carrier wave, and such independent transmit the solution assisted in main plot PCell
It is certainly impossible among scheme.
Among one embodiment according to the present invention, the first information includes at least one in following information:
The starting point of the transmission after the leader sequence；
The type of the transmission after the leader sequence；And
The pattern information of the transmission after the leader sequence.
As a result, the base station can by the starting point of the transmission after the leader sequence, in the leading sequence
The type of the transmission after column and in the pattern information of the transmission after the leader sequence at least one of
Embodying information is among the leader sequence, to obtain after blind examination to corresponding leader sequence for subsequent user equipment side
Relevant information is taken to carry out preamble preparation.
Among one embodiment according to the present invention, the type packet of the transmission after the leader sequence
Include the combination of data type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.
Those skilled in the art is it is to be appreciated that the transmission after the leader sequence herein can only include
Data also can be only reference signal U-RS；Meanwhile the transmission after the leader sequence equally can be reference signal
The combination of U-RS and data.Usually, reference signal U-RS will be arranged to be transmitted before the data or reference signal
It is embedded among data and transmits.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence
When for reference signal (U-RS) type, the pattern information includes duration, reference signal type and/or the reference signal
Location information in the mode.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence
When for reference signal (U-RS) type and the unauthorized carrier wave free time, the first base station is real after the leader sequence
Apply the reference signal (U-RS) transmission.
Among one embodiment according to the present invention, reference signal (U-RS) type include DRS, PSS, SSS,
At least one reference signal or a combination thereof in CRS, CSI-RS and/or PRS reference signal.Those skilled in the art should
Understand, reference signal type recited herein is only exemplary and not restrictive, that is to say, that invention of the invention
People herein can not all types of reference signals of exhaustion, but protection scope of the present invention includes but is not limited to cited herein
DRS, PSS, SSS, CRS, CSI-RS and/or PRS reference signal at least one reference signal or a combination thereof.
Among one embodiment according to the present invention, the specific orthogonal sequence of first community has at least one
OFDM symbol.Those skilled in the art is it is to be appreciated that the specific orthogonal sequence of first community equally being capable of basis
It needs that there are multiple OFDM symbols.
Among one embodiment according to the present invention, the leader sequence further includes second part, the second part
For at least occupying residue when the unauthorized carrier wave is idle and clear channel assessment (CCA) detects the symbol of vacant integer
Symbol, to occupy the unauthorized carrier wave.
Correspondingly, the second aspect of the present invention propose it is a kind of in the user equipment of wireless communication system for being awarded non-
Auxiliarily implement the method for aperiodicity reference signal transmission on power carrier wave based on leader sequence, which comprises
The user equipment blind examination is from the received leader sequence of corresponding base station institute, wherein the leader sequence is
The specific orthogonal sequence of first community with the first index selected in the specific orthogonal sequence pond of cell, wherein institute
State the first index instruction occupied after the leader sequence the unauthorized carrier wave first base station and indicate with described
The associated first information of transmission after leader sequence.
Among one embodiment according to the present invention, the first information includes at least one in following information:
The starting point of the transmission after the leader sequence；
The type of the transmission after the leader sequence；And
The pattern information of the transmission after the leader sequence.
It is hidden can to obtain the institute among the leader sequence among the leader sequence of institute's blind examination for the user equipment as a result,
Contain the starting point of the transmission after the leader sequence, the type of the transmission after the leader sequence with
And at least one information in the pattern information of the transmission after the leader sequence, to be subsequent user equipment
The reception of transmission of the side after the leader sequence provides necessary relevant information.
Among one embodiment according to the present invention, the type packet of the transmission after the leader sequence
Include the combination of data type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.
Those skilled in the art is it is to be appreciated that the transmission after the leader sequence herein can only include
Data also can be only reference signal U-RS；Meanwhile the transmission after the leader sequence equally can be reference signal
The combination of U-RS and data, when for both combination or combination, usually, reference signal U-RS will be arranged
It is transmitted before the data, at this point, user equipment will first receive corresponding reference signal U-RS and then receive related
Data.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence
When for reference signal (U-RS) type, the pattern information includes duration, reference signal type and/or the reference signal
Location information in the mode.
Base station just can will connect the relevant information such as reference signal of the reference signal after leader sequence as a result,
The location information etc. of duration, the type of reference signal and/or reference signal among the mode passes through leader sequence together
Among the pattern information that implies tell corresponding user equipment, to be provided for subsequent user equipment blind examination leader sequence
Auxiliary.
Among one embodiment according to the present invention, the user equipment is based on the received reference signal (U-RS) of institute and passes
It is defeated to implement thick synchronization, time and frequency-tracking, CSI and RRM measurement.Those skilled in the art is it is to be appreciated that the user sets
It is standby equally to implement other function based on received reference signal (U-RS) transmission of institute, that is to say, that protection of the invention
Range includes but is not limited to implement thick synchronization, time and frequency-tracking, CSI and RRM measurement.
Among one embodiment according to the present invention, the specific orthogonal sequence of first community has at least one
OFDM symbol.Those skilled in the art is it is to be appreciated that the specific orthogonal sequence of first community equally being capable of basis
It needs that there are multiple OFDM symbols.
Among one embodiment according to the present invention, when the unauthorized carrier wave is idle and clear channel assessment (CCA) detects
When the symbol of vacant integer, the leader sequence further includes at least for occupying the remaining symbol of the unauthorized carrier wave
Second part.
With the solution phase of the aperiodicity discovery reference signal DRS transmission assisted by the main plot PCell authorized
Than the solution of method according to the present invention can be after obtaining corresponding channel as the base station of transmitter quickly non-
The transmission that aperiodicity reference signal U-RS is carried out on carrier wave is authorized, to avoid the wasting of resources and maximize related resource
Utilization.Although proposed solution will will increase the complexity of the detection leader sequence of user equipment side, in this way
Solution and be not introduced into such as main plot PCell auxiliary additional signaling overheads.Furthermore the side according to the present invention
Method can also apply to the individual transmission of unauthorized carrier wave, and such individual transmit the solution assisted in main plot PCell
It is certainly impossible among scheme.
Detailed description of the invention
The following detailed description to non-limiting embodiment, other spies of the invention are read by referring to accompanying drawing
Sign, objects and advantages will become more apparent upon.
Fig. 1 shows the time diagram 100 of the solution of cyclical transmission discovery reference signal；
Fig. 2 shows shown by means of the subframe structure of the aperiodicity discovery reference signal transmission of main plot PCell auxiliary
It is intended to 200；
Fig. 3 show according to the present invention in the base station of wireless communication system on unauthorized carrier wave based on leading
Sequence auxiliarily implements the flow chart 300 of the method for aperiodicity reference signal transmission；
Fig. 4 show according to the present invention in the user equipment of wireless communication system for being based on unauthorized carrier wave
Leader sequence auxiliarily implements the flow chart 400 of the method for aperiodicity reference signal transmission；And
Fig. 5 show according to the present invention in a wireless communication system on unauthorized carrier wave based on leader sequence it is auxiliary
Implement the schematic diagram 500 of the subframe structure of aperiodicity reference signal transmission with helping.
Run through different diagrams in the figure, same or similar appended drawing reference indicates the same or similar device (module)
Or step.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use other
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
The range of invention is defined by the claims appended hereto.
Illustrate below in conjunction with attached drawing 3 and attached drawing 4 described in a wireless communication system for non-according to the present invention
Auxiliarily implement the method for aperiodicity reference signal transmission on authorization carrier wave based on leader sequence.Fig. 3 is shown according to this hair
Bright auxiliarily implements aperiodicity ginseng for being based on leader sequence on unauthorized carrier wave in the base station of wireless communication system
Examine the flow chart 300 of the method for signal transmission.Fig. 4 shows using in the user equipment of wireless communication system according to the present invention
In the flow chart 400 for the method for auxiliarily implementing aperiodicity reference signal transmission based on leader sequence on unauthorized carrier wave.
As can be seen from Figure 3, for auxiliary based on leader sequence on unauthorized carrier wave in the base station of wireless communication system
Implement aperiodicity reference signal transmission method 300 with helping includes:
Firstly, among method and step 310, it will configure the specific orthogonal sequence pond of cell for the base station；And
Next, among method and step 320, it will selection has the first rope from the cell specific orthogonal sequence pond
First part of the specific orthogonal sequence of the first community drawn as the leader sequence, wherein the first index instruction is before this
Sequence is led to occupy the first base station of the unauthorized carrier wave later and indicate associated with the transmission after the leader sequence
The first information.
With the solution phase of the aperiodicity discovery reference signal DRS transmission assisted by the main plot PCell authorized
Than the solution of method according to the present invention can be after obtaining corresponding channel as the base station of transmitter quickly non-
The transmission that aperiodicity reference signal U-RS is carried out on carrier wave is authorized, to avoid the wasting of resources and maximize related resource
Utilization.Although proposed solution will will increase the complexity of the detection leader sequence of user equipment side, in this way
Solution and be not introduced into such as main plot PCell auxiliary additional signaling overheads.Furthermore the side according to the present invention
Method can also apply to the individual transmission of unauthorized carrier wave, and such individual transmit the solution assisted in main plot PCell
It is certainly impossible among scheme.
Among one embodiment according to the present invention, which includes at least one in following information: at this
The starting point of the transmission after leader sequence；The type of the transmission after the leader sequence；And in the leader sequence
The pattern information of the transmission later.As a result, the base station can by the starting point of the transmission after the leader sequence, at this
The type of the transmission after leader sequence and in the pattern information of the transmission after the leader sequence at least one of
Embodying information is among the leader sequence, to obtain after blind examination to corresponding leader sequence for subsequent user equipment side
Relevant information has carried out preamble preparation.
Among one embodiment according to the present invention, the type of the transmission after the leader sequence includes data
The combination of type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.Those skilled in the art
Member also can be only reference signal it is to be appreciated that transmission after the leader sequence herein can only include data
U-RS；Meanwhile the transmission after the leader sequence equally can be reference signal U-RS and data combination, for they two
When the combination or combination of person, usually, reference signal U-RS will be arranged to be transmitted before the data.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence is reference
When signal (U-RS) type, the pattern information include duration, reference signal type and/or the reference signal in this mode
Location information.Base station just can believe the relevant information such as reference for connecing the reference signal after leader sequence as a result,
Number duration, reference signal location information among the mode of type and/or reference signal etc. together by leading
The pattern information implied among sequence tells corresponding user equipment, to be subsequent user equipment blind examination leader sequence
Auxiliary is provided.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence is reference
When signal (U-RS) type and the unauthorized carrier wave free time, which implements the reference signal after the leader sequence
(U-RS) it transmits.
Among one embodiment according to the present invention, reference signal (U-RS) type include DRS, PSS, SSS, CRS,
At least one reference signal or a combination thereof in CSI-RS and/or PRS reference signal.Those skilled in the art should
Solution, reference signal type recited herein are only exemplary and not restrictive, that is to say, that the present inventor
The impossible all types of reference signals of exhaustion herein, but protection scope of the present invention includes but is not limited to cited herein
At least one reference signal or a combination thereof in DRS, PSS, SSS, CRS, CSI-RS and/or PRS reference signal.
Among one embodiment according to the present invention, the specific orthogonal sequence of the first community has at least one OFDM
Symbol.Those skilled in the art is it is to be appreciated that the specific orthogonal sequence of the first community can equally have as needed
Multiple OFDM symbols.
Among one embodiment according to the present invention, which further includes second part, which is used for
Remaining symbol is at least occupied when the unauthorized carrier wave is idle and clear channel assessment (CCA) detects the symbol of vacant integer,
To occupy the unauthorized carrier wave.
Figure 4, it can be seen that for being based on leading sequence on unauthorized carrier wave in the user equipment of wireless communication system
Column auxiliarily implement aperiodicity reference signal transmission method 400 include a step, that is, step 410, this method step it
In, user equipment blind examination is from the received leader sequence of corresponding base station institute, wherein the leader sequence be from cell specifically just
Hand over the specific orthogonal sequence of first community with the first index selected in sequence pond, wherein the first index instruction exists
The first base station of the unauthorized carrier wave is occupied after the leader sequence and is indicated related to the transmission after the leader sequence
The first information of connection.
Among one embodiment according to the present invention, which includes at least one in following information:
The starting point of the transmission after the leader sequence；
The type of the transmission after the leader sequence；And
The pattern information of the transmission after the leader sequence.
The user equipment can obtain among the leader sequence of institute's blind examination as a result, implies among the leader sequence
In the starting point of the transmission after the leader sequence, the type of the transmission after the leader sequence and in the leading sequence
In the pattern information of the transmission after column at least one of information, thus for subsequent user equipment side the leader sequence it
The reception of transmission afterwards provides necessary relevant information.
Among one embodiment according to the present invention, the type of the transmission after the leader sequence includes data
The combination of type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.
Those skilled in the art is it is to be appreciated that transmission after the leader sequence herein can only include number
According to also being only reference signal U-RS；Meanwhile the transmission after the leader sequence equally can be reference signal U-RS
With the combination of data.Usually, reference signal U-RS will be arranged to be transmitted before the data or reference signal is embedded in
It is transmitted among data.If reference signal U-RS is arranged to transmit before the data, user equipment will be received first accordingly
Reference signal U-RS and then receive relevant data.
Among one embodiment according to the present invention, when the type of the transmission after leader sequence is reference
When signal (U-RS) type, the pattern information include duration, reference signal type and/or the reference signal in this mode
Location information.
Among one embodiment according to the present invention, which is based on received reference signal (U-RS) transmission of institute
Implement thick synchronization, time and frequency-tracking, CSI and RRM measurement.Those skilled in the art is it is to be appreciated that the user equipment is same
Sample can implement other function based on received reference signal (U-RS) transmission of institute, that is to say, that protection scope of the present invention
Including but not limited to implement thick synchronization, time and frequency-tracking, CSI and RRM measurement.
Among one embodiment according to the present invention, the specific orthogonal sequence of the first community has at least one OFDM
Symbol.Those skilled in the art is it is to be appreciated that the specific orthogonal sequence of the first community equally can be as needed with more
A OFDM symbol.
Among one embodiment according to the present invention, when the unauthorized carrier wave is idle and clear channel assessment (CCA) detects not
When occupying the symbol of integer, which further includes at least for occupying the second of the remaining symbol of the unauthorized carrier wave
Part.
Showing for the subframe structure comprising leader sequence when method according to the present invention is implemented is described below with reference to Fig. 5
It is intended to.Fig. 5 show according to the present invention in a wireless communication system on unauthorized carrier wave based on leader sequence assist
Implement the schematic diagram 500 of the subframe structure of aperiodicity reference signal transmission in ground.
From figure 5 it can be seen that when base station and user equipment are according to first aspect and second party according to the present invention
When method described in face carrys out aperiodicity transmission of the implementation reference signal on unauthorized carrier wave, base station is first listened to meet
The LBT transmitted afterwards is regular and must come into effect clear channel assessment (CCA) detection from the last symbol of subframe 0 first, until son
The third symbol of frame 2, when the result of clear channel assessment (CCA) detection is the channel idle, which will will do it leader sequence
Transmission.But from figure 5 it can be seen that the clear channel assessment (CCA) detection completely occupy subframe 2 third symbol, this
When, leader sequence can include second part above-mentioned, i.e. the leader sequence can be selected randomly, because its function is only
Only occupy the channel.Certainly, those skilled in the art is it is to be appreciated that the second part of the leader sequence is not must
Must, that is to say, that the leader sequence not necessarily includes the second part, for example, when clear channel assessment (CCA) detection occupies
Then the leader sequence does not need have the second part when integer OFDM symbol, i.e., the second part is extra at this time
?.Next, base station just starts the first part to corresponding user device transmissions leader sequence, the selection of the first part
It is worthy of careful study, as previously mentioned, the specific orthogonal sequence pond of cell, the then base station will be configured first for the base station in a base station
The specific orthogonal sequence of first community with the first index will be selected as before this from the specific orthogonal sequence pond of cell
Lead the first part of sequence, wherein the first index instruction occupies the first base of the unauthorized carrier wave after the leader sequence
It stands and indicates the first information associated with the transmission after the leader sequence.Correspondingly, user equipment then can blind examination from
Received leader sequence of corresponding base station institute, wherein the leader sequence is selected in the specific orthogonal sequence pond of cell
With first index the specific orthogonal sequence of first community, wherein this first index instruction accounted for after the leader sequence
According to the first base station and the instruction first information associated with the transmission after the leader sequence of the unauthorized carrier wave.By
This, user equipment just can learn that transmitted after the leader sequence is unauthorized load and the blind examination to the leader sequence
Reference signal or data for being transmitted on wave or a combination thereof.It, should be in unauthorized carrier wave among embodiment out shown in Fig. 5
On the reference signal transmitted occupy from the 5th symbol of subframe 2 to the symbol money between the 4th symbol of subframe 3
Source, but those skilled in the art is it is to be appreciated that Fig. 5 is only exemplary and not restrictive, that is to say, that leading sequence
It is not necessarily illustrated in fig. 5 more than one to arrange occupied symbolic number, and the reference transmitted on unauthorized carrier wave
Signal also not necessarily occupies symbolic number illustrated in fig. 5 just.In contrast, the reference transmitted on unauthorized carrier wave
The occupied symbolic number of signal will among leader sequence about the reference signal transmitted on unauthorized carrier wave
Duration specifies.In addition, those skilled in the art is it is to be appreciated that simultaneously from the blank of the 5th sign-on of subframe 3
Other signals will not be transmitted by not representing, in contrast, also can then be carried out data transmission.Alternatively, also not necessarily leading
The reference signal transmitted on unauthorized carrier wave is necessarily transmitted after sequence, and may also directly transmit data.These are all
It will impliedly be expressed among leader sequence.
With the solution phase of the aperiodicity discovery reference signal DRS transmission assisted by the main plot PCell authorized
Than the solution of method according to the present invention can be after obtaining corresponding channel as the base station of transmitter quickly non-
The transmission that aperiodicity reference signal U-RS is carried out on carrier wave is authorized, to avoid the wasting of resources and maximize related resource
Utilization.Although proposed solution will will increase the complexity of the detection leader sequence of user equipment side, in this way
Solution and be not introduced into such as main plot PCell auxiliary additional signaling overheads.Furthermore the side according to the present invention
Method can also apply to the individual transmission of unauthorized carrier wave, and such individual transmit the solution assisted in main plot PCell
It is certainly impossible among scheme.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
How from the point of view of, the present embodiments are to be considered as illustrative and not restrictive.In addition, it will be evident that one word of " comprising " not
Exclude other elements and steps, and wording "one" be not excluded for plural number.The multiple element stated in device claim can also
To be implemented by one element.The first, the second equal words are used to indicate names, and are not indicated any particular order.
Claims (15)
1. a kind of auxiliarily implement non-week for being based on leader sequence on unauthorized carrier wave in the base station of wireless communication system
The method of phase property reference signal transmission, which comprises
The specific orthogonal sequence pond of cell is configured for the base station；And
Selected from the specific orthogonal sequence pond of the cell with first index the specific orthogonal sequence of first community as
The first part of the leader sequence,
Wherein, the first index instruction occupies the first base station of the unauthorized carrier wave and is referred to after the leader sequence
Show the first information associated with the transmission after the leader sequence.
2. according to the method described in claim 1, wherein, the first information includes at least one in following information:
The starting point of the transmission after the leader sequence；
The type of the transmission after the leader sequence；And
The pattern information of the transmission after the leader sequence.
3. according to the method described in claim 2, wherein, the type of the transmission after the leader sequence includes
The combination of data type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.
4. according to the method described in claim 3, wherein, when the type of the transmission after leader sequence is
When reference signal (U-RS) type, the pattern information includes that duration, reference signal type and/or the reference signal exist
Location information in the mode.
5. according to the method described in claim 3, wherein, when the type of the transmission after leader sequence is
When reference signal (U-RS) type and the unauthorized carrier wave free time, the first base station is implemented after the leader sequence
Reference signal (U-RS) transmission.
6. according to the method described in claim 3, wherein, reference signal (U-RS) type include DRS, PSS, SSS, CRS,
At least one reference signal or a combination thereof in CSI-RS and/or PRS reference signal.
7. according to the method described in claim 1, wherein, the specific orthogonal sequence of first community has at least one OFDM
Symbol.
8. the second part is used according to the method described in claim 1, wherein, the leader sequence further includes second part
It is remaining at least being occupied when the unauthorized carrier wave is idle and clear channel assessment (CCA) detects the symbol of vacant integer
Symbol, to occupy the unauthorized carrier wave.
9. a kind of auxiliarily implement in the user equipment of wireless communication system for being based on leader sequence on unauthorized carrier wave
The method of aperiodicity reference signal transmission, which comprises
The user equipment blind examination is from the received leader sequence of corresponding base station institute, wherein the leader sequence is from small
The specific orthogonal sequence of first community with the first index selected in the specific orthogonal sequence pond in area, wherein described the
One index instruction occupied after the leader sequence the unauthorized carrier wave first base station and indicate with described leading
The associated first information of transmission after sequence.
10. according to the method described in claim 9, wherein, the first information includes at least one in following information:
The starting point of the transmission after the leader sequence；
The type of the transmission after the leader sequence；And
The pattern information of the transmission after the leader sequence.
11. according to the method described in claim 10, wherein, the type packet of the transmission after the leader sequence
Include the combination of data type, reference signal (U-RS) type and/or data type and reference signal (U-RS) type.
12. according to the method for claim 11, wherein when the type of the transmission after leader sequence
When for reference signal (U-RS) type, the pattern information includes duration, reference signal type and/or the reference signal
Location information in the mode.
13. according to the method for claim 12, wherein the user equipment is based on the received reference signal (U-RS) of institute and passes
It is defeated to implement thick synchronization, time and frequency-tracking, CSI and RRM measurement.
14. according to the method described in claim 9, wherein, the specific orthogonal sequence of first community has at least one
OFDM symbol.
15. according to the method described in claim 9, wherein, when the unauthorized carrier wave free time and clear channel assessment (CCA) detects
When the symbol of vacant integer, the leader sequence further includes at least for occupying the remaining symbol of the unauthorized carrier wave
Second part.
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| CN104980966A (en) * | 2014-04-04 | 2015-10-14 | 苹果公司 | Cell Measurements in Unlicensed Frequency Bands |
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