CN105282859A - Method and device for transmission of active antenna system - Google Patents
Method and device for transmission of active antenna system Download PDFInfo
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- CN105282859A CN105282859A CN201410345563.4A CN201410345563A CN105282859A CN 105282859 A CN105282859 A CN 105282859A CN 201410345563 A CN201410345563 A CN 201410345563A CN 105282859 A CN105282859 A CN 105282859A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The present invention provides a method and device for transmission of an active antenna system. In one embodiment, UE (User Equipment) firstly receives a downlink RS (Reference Signal), wherein the RS comprises M RS ports; a first RS port is selected from the M RS ports; then a first signature sequence is sent, and the first RS port maps the first signature sequence; and a downlink reply with respect to the first signature sequence is detected, wherein the downlink reply comprises a timing advanced instruction. The M is a positive integer larger than 1, and one RS port maps K signature sequences; and the K is a positive integer, and the downlink RS and the signature sequence are transmitted at the same carrier. According to the invention, the receiving quality of a RA (Random Access) sequence may be effectively improved or the power of the UE to send the RA sequence may be reduced. Moreover, the method and device for transmission of active antenna system are compatible with the present LTE (Long Term Evolution) standard as good as possible, with good compatibility.
Description
Technical field
The present invention relates to RA (RandomAccess in mobile communication technology field, Stochastic accessing) scheme, particularly relate to the RA scheme in the mobile communication system that have employed MIMO (MultipleInputMultipleOutput, Multiinputoutput) technology.
Background technology
Traditional 3GPP (3rdGenerationPartnerProject, third generation partner program) LTE (LongTermEvolution, Long Term Evolution) system supports two kinds of RA processes, i.e. CBRAP (ContentionBasedRAProcedure, content-based random access procedure) and CFRAP (ContentionFreeRAProcedure, the random access procedure without content).64 RA sequences (Preambles) are supported, wherein 64-N in a community
cfindividual for CBRAP, N
cfindividual for CFRAP.One of difference of CBRAP and CFRAP is: in CBRAP, and UE (UserEquipment, subscriber equipment) is from 64-N
cfselect suitable RA sequence voluntarily in individual candidate RA sequence, and in CFRAP, base station is from N
cfselect RA sequence allocation to UE in individual candidate RA sequence.
CSI (the ChannelStatusInformation of LTEMIMO channel, channel condition information) detect be based on CRS (CellReferenceSignal, cell reference signals) or CSI-RS (CSIR eferenceSignal, channel status instruction reference signal) carry out.LTE defines 3 kinds of CSI-RS port numbers: 2,4,8.
Along with the maturation of AAS (ActiveAntennaSystem, active antenna system) technology, large scale MIMO becomes a study hotspot.Compare with traditional MIMO, large scale MIMO can form narrower wave beam, obtains larger power system capacity.Only have base station to obtain down channel CSI comparatively accurately, fully could obtain the gain of large scale MIMO.Consider FDD (FrequencyDivisionDuplex, Frequency Division Duplexing (FDD)) great expense incurred in large scale mimo system required for feeding back downlink CSI, large scale MIMO is more suitable for TDD (TimeDivisionDuplex, time division duplex) pattern.For tdd mode, typical scene when UE sends RA sequence is that base station not yet obtains channel CSI, and how base station detects the problem that gain that RA sequence could obtain large scale MIMO then becomes a needs solution.
The present invention is directed to the problems referred to above and disclose a kind of RA scheme.
Summary of the invention
The invention discloses a kind of method in UE, wherein, comprise the steps:
-steps A. receive descending RS (ReferenceSignal, reference signal), described descending RS comprises M RS port
-step B. selects a RS port from described M RS port
-step C. sends fisrt feature sequence, a RS port mapping fisrt feature sequence
-step D. detects the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
As an embodiment, the same described characteristic sequence of multiple described RS port mapping.As an embodiment, determine a RS port according to the quality of reception of described M RS port.As an embodiment, described characteristic sequence is ZadOffChu sequence.As an embodiment, described descending answer is RAR (RandomAccessResponse, Stochastic accessing replies).As an embodiment, described RS port adopts the mode of precoding to send by the transmitting antenna of the transmission base station equipment of described RS, described M the individual different precoding vector of the corresponding M of RS port.As an embodiment, described RS port and described characteristic sequence are one to one.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 0. receives the mapping that downlink signaling determines described RS port and described characteristic sequence.
As an embodiment, described downlink signaling is SIB (SystemInformationBlock, system information block).As an embodiment, described downlink signaling is the specific RRC (RadioResourceControl of UE, wireless heterogeneous networks) layer signaling, described downlink signaling is at PCC (PrimaryComponentCarrier, main carrier) upper transmission, described descending RS is in the upper transmission of SCC (SecondaryCarrierComponent).
Concrete, according to an aspect of the present invention, it is characterized in that, the quality of reception of a RS port is higher than specific threshold, and described specific threshold is pre-determining or configurable.
As an embodiment, the described quality of reception comprises { RSRP (ReferenceSignalReceivedPower, Reference Signal Received Power), RSRQ (ReferenceSignalReceivedQuality, Reference Signal Received Quality) in one or two kinds.As another embodiment, the described quality of reception is the PRACH (PhysicalRandomAccessChannel for sending RA sequence, Physical Random Access Channel) CQI (ChannelQualityIndicator of frequency band, channel quality indicates), described PRACH frequency band is configured by descending high-level signaling.As an embodiment, described specific threshold is the mean value of the quality of reception of described M RS port.As an embodiment, described specific threshold is that the mean value of the quality of reception of described M RS port adds side-play amount, and described side-play amount is configurable.
Concrete, according to an aspect of the present invention, it is characterized in that, described step C sends described characteristic sequence described UE first time in current random access procedure, and a RS port is the RS port in described M RS port with the best quality of reception.
As an embodiment, described UE sends described characteristic sequence corresponding to the best RS port of the selection quality of reception in the first time of a random access procedure, if correctly do not receive descending answer, then in described M RS port, the quality of reception continues to send higher than selecting a described characteristic sequence in the RS port of specific threshold.
Concrete, according to an aspect of the present invention, it is characterized in that, the pattern of described RS port in subframe is the pattern of CSI-RS port in subframe.
The invention discloses a kind of method in base station, wherein, comprise the steps:
-steps A. send descending RS, described descending RS comprises M RS port
-step B. receives fisrt feature sequence, and fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port
-step C. sends the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
As an embodiment, described characteristic sequence is RA sequence.As an embodiment, described RS port adopts precoding mode to send by the transmitting antenna of described base station, described M the individual different precoding vector of the corresponding M of RS port, the implementation method of described step B is: described base station adopts precoding vector corresponding to a RS port to perform MRC (MaximumRatioCombining to received signal, maximum-ratio combing), then detect fisrt feature sequence.As an embodiment, described M is the antenna amount of the transmission cell equipment of described descending RS.As an embodiment, 1 described characteristic sequence is simultaneously by 2 described RS port mapping, and the present embodiment is applicable to available described characteristic sequence number and is less than described M.
The advantage of said method is, if UE have sent fisrt feature sequence, the precoding vector that then a RS port is corresponding reflects the CSI between described UE and described base station preferably, described base station adopts precoding vector corresponding to a RS port to perform the reception SINR (SignalInterferenceNoiseRatio that MRC can strengthen fisrt feature sequence, Signal to Interference plus Noise Ratio), and then improve the quality of reception or support the fisrt feature sequence that low-power sends.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 0. sends the mapping that downlink signaling indicates described RS port and described characteristic sequence.
Concrete, according to an aspect of the present invention, it is characterized in that, the quality of reception of a RS port is higher than specific threshold, and described specific threshold is pre-determining or configurable.
Concrete, according to an aspect of the present invention, it is characterized in that, described step C sends described characteristic sequence described UE first time in current random access procedure, and a RS port is the RS port in described M RS port with the best quality of reception.
Concrete, according to an aspect of the present invention, it is characterized in that, the pattern of described RS port in subframe is the pattern of CSI-RS port in subframe.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: for receiving descending RS, described descending RS comprises M RS port
Second module: for selecting a RS port from described M RS port
3rd module: for sending fisrt feature sequence, a RS port mapping fisrt feature sequence
Four module: for detecting the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: for sending descending RS, described descending RS comprises M RS port
Second module: for receiving fisrt feature sequence, fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port
3rd module: for sending the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
How to receive this problem of RA sequence when not obtaining channel CSI for base station, method provided by the invention is by RA sequence and RS port binding, and UE determines RA sequence according to the quality of reception of RS port.The precoding vector that the RS port of base station binding is corresponding receives corresponding RA sequence.The solution of the present invention effectively can improve the quality of reception of RA sequence or reduce the power that UE sends RA sequence.The compatible as far as possible existing LTE standard of the present invention simultaneously, has good compatibility.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the flow chart of random access procedure according to an embodiment of the invention;
Fig. 2 shows the structured flowchart for the processing unit in UE according to an embodiment of the invention;
Fig. 3 shows the structured flowchart for the processing unit in base station according to an embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 is the flow chart of random access procedure, as shown in Figure 1.In accompanying drawing 1, base station N1 is the serving BS of UEU2.
For base station N1, in step s 11, send descending RS, described descending RS comprises M RS port; In step s 12, receive fisrt feature sequence, fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port; In step s 13, send the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
For UEU2, in the step s 21, receive descending RS, described descending RS comprises M RS port; In step S22, from described M RS port, select a RS port; In step S23, send fisrt feature sequence, a RS port mapping fisrt feature sequence; In step s 24 which, detect the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
In embodiment 1, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.The quality of reception of the one RS port is higher than specific threshold, and described specific threshold is pre-determining or configurable
As the sub-embodiment 1 of embodiment 1, described M be greater than 8 positive integer, the set of the described characteristic sequence of described M RS port mapping is the RA arrangement set for CBRAP of the transmission community of described descending RS, and described characteristic sequence is RA sequence, and described descending answer is RAR.
As the sub-embodiment 2 of embodiment 1, base station N1 sends the mapping that downlink signaling indicates described RS port and described characteristic sequence in step s 11.UEU2 receives the mapping that downlink signaling determines described RS port and described characteristic sequence in step s 12.
As the sub-embodiment 3 of embodiment 1, described step 23 sends described characteristic sequence at UEU2 first time in current RA process, and a RS port is the RS port in described M RS port with the best quality of reception.
As the sub-embodiment 4 of embodiment 1, described K equals 1.
Embodiment 2
Embodiment 2 is structured flowcharts of the processing unit in UE, as shown in Figure 2.In accompanying drawing 2, UE device 200 is by receiver module 201, and select module 202, sending module 203, receiver module 204 forms.
Receiver module 201 is for receiving descending RS, and described descending RS comprises M RS port; Select module 202 for selecting a RS port from described M RS port; Sending module 203 for sending fisrt feature sequence, a RS port mapping fisrt feature sequence; Receiver module 204 is for detecting the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
In embodiment 2, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.The quality of reception of the one RS port is higher than specific threshold, and described specific threshold is the mean value of the quality of reception of described M RS port.
As the sub-embodiment 1 of embodiment 2, the pattern of described RS port in subframe is the pattern of CSI-RS port in subframe.
As the sub-embodiment 2 of embodiment 2, receiver module 201 also determines the mapping of described RS port and described characteristic sequence for receiving downlink signaling.
Embodiment 3
Embodiment 3 is structured flowcharts of the processing unit in base station, as shown in Figure 3.In accompanying drawing 3, base station apparatus 300 is by sending module 301, and receiver module 302, sending module 303 forms.
Sending module 301 is for sending descending RS, and described descending RS comprises M RS port; Receiver module 302 for receiving fisrt feature sequence, fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port; Sending module 303 is for sending the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
In embodiment 3, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.The quality of reception of the one RS port is higher than specific threshold, and described specific threshold is the mean value of the quality of reception of described M RS port.
As the sub-embodiment 1 of embodiment 3, the pattern of described RS port in subframe is the pattern of CSI-RS port in subframe.
As the sub-embodiment 2 of embodiment 3, sending module 301 also indicates the mapping of described RS port and described characteristic sequence for sending downlink signaling.
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (11)
1. the method in UE, wherein, comprises the steps:
-steps A. receive descending RS, described descending RS comprises M RS port
-step B. selects a RS port from described M RS port
-step C. sends fisrt feature sequence, a RS port mapping fisrt feature sequence
-step D. detects the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
2. method according to claim 1, is characterized in that, described steps A also comprises the steps:
-steps A 0. receives the mapping that downlink signaling determines described RS port and described characteristic sequence.
3. the method according to claim 1-2, is characterized in that, the quality of reception of a RS port is higher than specific threshold, and described specific threshold is pre-determining or configurable.
4. method according to claim 3, is characterized in that, described step C sends described characteristic sequence described UE first time in current random access procedure, and a RS port is the RS port in described M RS port with the best quality of reception.
5. the method according to claim 1-4, is characterized in that, the pattern of described RS port in subframe is the pattern of CSI-RS port in subframe.
6. the method in base station, wherein, comprises the steps:
-steps A. send descending RS, described descending RS comprises M RS port
-step B. receives fisrt feature sequence, and fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port
-step C. sends the descending answer for fisrt feature sequence, and described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
7. method according to claim 6, is characterized in that, described steps A also comprises the steps:
-steps A 0. sends the mapping that downlink signaling indicates described RS port and described characteristic sequence.
8. the method according to claim 6-7, is characterized in that, the quality of reception of a RS port is higher than specific threshold, and described specific threshold is pre-determining or configurable.
9. method according to claim 8, is characterized in that, described step C sends described characteristic sequence described UE first time in current random access procedure, and a RS port is the RS port in described M RS port with the best quality of reception.
10. a subscriber equipment, is characterized in that, this equipment comprises:
First module: for receiving descending RS, described descending RS comprises M RS port
Second module: for selecting a RS port from described M RS port
3rd module: for sending fisrt feature sequence, a RS port mapping fisrt feature sequence
Four module: for detecting the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
11. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: for sending descending RS, described descending RS comprises M RS port
Second module: for receiving fisrt feature sequence, fisrt feature sequence mapping the one RS port, a RS port is one in described M RS port
3rd module: for sending the descending answer for fisrt feature sequence, described descending answer comprises timing advance instruction.
Wherein, described M be greater than 1 positive integer, described RS port mapping K described characteristic sequence, described K is positive integer, and described descending RS and described characteristic sequence transmit at same carrier wave.
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| CN201910481427.0A CN110493881B (en) | 2014-07-19 | 2014-07-19 | Method and device for multi-antenna transmission in UE and base station |
| CN201410345563.4A CN105282859B (en) | 2014-07-19 | 2014-07-19 | A kind of user equipment, transmission method and device in base station |
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| US20140086285A1 (en) * | 2012-09-27 | 2014-03-27 | Nokia Siemens Networks Oy | Non-codebook based channel state information feedback |
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| KR101753391B1 (en) * | 2009-03-30 | 2017-07-04 | 엘지전자 주식회사 | Method and apparatus of transmitting signal in wireless communication system |
| CN101877884A (en) * | 2009-04-30 | 2010-11-03 | 华为技术有限公司 | Information transmission method and communication device |
| US9344953B2 (en) * | 2009-08-17 | 2016-05-17 | Nokia Technologies Oy | Apparatus and method for initialization and mapping of reference signals in a communication system |
| CN102170330B (en) * | 2011-04-29 | 2017-08-08 | 中兴通讯股份有限公司 | The sending method and system of measuring reference signals |
| KR20130134873A (en) * | 2012-05-31 | 2013-12-10 | 삼성전자주식회사 | Method and apparatus for transmitting in wireless communication system |
| CN103828454B (en) * | 2012-08-02 | 2018-09-21 | 华为技术有限公司 | Configure method, base station and the user equipment of reference signal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102378270A (en) * | 2010-08-16 | 2012-03-14 | 上海贝尔股份有限公司 | Method for determining reference signal (RS) pattern |
| CN103313250A (en) * | 2012-03-16 | 2013-09-18 | 华为技术有限公司 | Cell configuration method, synchronization method, user equipment and base station |
| US20140086285A1 (en) * | 2012-09-27 | 2014-03-27 | Nokia Siemens Networks Oy | Non-codebook based channel state information feedback |
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| CN110493881A (en) | 2019-11-22 |
| CN105282859B (en) | 2019-08-20 |
| CN110493881B (en) | 2020-12-29 |
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