CN103391573B - The measuring method of a kind of downlink channel condition information, device and subscriber equipment - Google Patents

Abstract

The present invention is applicable to wireless communication technology field, it is provided that the measuring method of a kind of downlink channel condition information, device and subscriber equipment, and described method includes: synchronize multiple TP, obtains M sync bit；It is synchronized to the first optimal synchronisation position；When receive service TP send channel state information reference signals CSI RS resource management collect message time, collect message according to resource management, measure each TP send CSI RS report value；Being synchronized on other sub-optimal sync bit, collect message according to resource management, that measures the CSI RS of each TP transmission described in obtaining reports value；The value that reports corresponding for maximum RSRQ corresponding to each TP obtain all sync bit measurements combines, and form all TP reports value.The present invention, can accurately measure the CSI RS signal from other community.

Description

The measuring method of a kind of downlink channel condition information, device and subscriber equipment

Technical field

The invention belongs to wireless communication technology field, particularly relate to the measurement side of a kind of downlink channel condition information Method, device and subscriber equipment.

Background technology

The development of new generation of wireless communication technology, the requirement to efficiency of transmission is more and more higher.Such as, with 3G(3G: 3rd-Generation, 3G (Third Generation) Moblie) it is the international mobile telecommunication-2000(International of representative Mobile Telecommunications-2000, IMT-2000) communication system, its spectral efficiency requirements is the highest It is 0.4 bits per second/Hz(bit per second, bps)；And the 4th generation (4th-Generation, 4G) or Quasi-4G is international mobile telecommunication-senior (the International Mobile of representative Telecommunications-Advanced, IMT-A) mobile communication system, its spectral efficiency requirements is the highest Reaching descending 15bps/Hz, up is then 6.75bps/Hz.In order to reach the most efficient radio transmission efficiency, greatly The technology of amount advanced person is introduced in IMT-A system, as in lte-a system, just introduces multi-user Multiple-input, multiple-output (Multi-μ ser Multiple-Input and Multiple-Output, MU-MIMO) technology, Collaborative multiple spot (Coordinated Multiple Points, CoMP) technology.The introducing of these advanced technologies, pole The earth improves the spectrum efficiency of community.

But, in actual mobile communication system, the technical advantage of above-mentioned ACT to be obtained, have Many concrete system design difficulties.One of them is exactly channel condition information (Channel State Information, CSI) how to obtain.Especially, in the application of CoMP technology, service transmission point (the more generally address of Transmission Point, TP-community) is it is to be appreciated that adjacent multiple subscriber equipmenies The descending CSI of (User Equipment, UE) side.In actual scene, will obtain these CSI is ratio More difficult, the problem that more there is many during standardized needs to solve.

One of them is it is a key issue that work as physical area number (the Physical Cell of adjacent TP and service TP Identity, PCID) identical time, service TP can distribute channel condition information reference to the UE needing to be CoMP Signal (Channel State Information Reference Signal, CSI-RS), has identical PCID many Individual TP can distribute identical or different CSI-RS.In other words, multiple different service TP can identical or Descending CSI-RS is sent in different CSI-RS；UE then needs to come according to these CSI-RS Measure the descending CSI information from each TP, using as the foundation realizing descending CoMP.But in this scene Under, the signal from multiple TP can be superimposed, when the station spacing of different base station exceedes certain distance, The signal that different base station sends can exceed the protection domain of Cyclic Prefix (Cycle Prefix, CP) and produce Certain intersymbol interference, the UE that is now synchronized to service under TP is by can not be according to launching from other TP CSI-RS carries out correct measurement to the descending CSI information from other TP, thus brings the mistake of measurement By mistake or deviation, these deviations will reduce even offset CoMP realize effect.

Prior art uses the method that UE is only synchronized to current Serving cell to realize reducing the mistake measured By mistake or deviation, but, this method only can make UE to the CSI-RS of the community from current service Measurement is accurately, and the measurement to the CSI-RS from other community is inaccurate.The most right Pre-coding matrix instruction (Precoding Matrix Indicator, PMI) and channel quality instruction (Channel Quality Indication, CQI) selection there will be mistake or deviation, selection and the CoMP to CoMP collection Implementation strategy all have an impact.Eventually resulting in mobile radio system has spent what the biggest expense realized to answer Miscellaneous collaborative and scheduling but can not get corresponding gain, even makes the penalty of mobile radio system.

Summary of the invention

Embodiments provide the measuring method of a kind of downlink channel condition information, device and subscriber equipment, Aim to solve the problem that the subscriber equipment of prior art is inaccurate to the measurement of the CSI-RS from other community Problem.

On the one hand, it is provided that the measuring method of a kind of downlink channel condition information, described method includes:

Multiple service transmission point TP are synchronized, obtains M sync bit, described M sync bit It is followed successively by the first optimal synchronisation position Pos0 and other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, The value of described M not less than the size of collaborative multimetering collection, described collaborative multimetering collection be for measuring and The TP set of feedback of down channel status information；

It is synchronized to described first optimal synchronisation position Pos0；

When receiving the channel state information reference signals CSI-RS management collection message that service TP sends Time, collect message according to described resource management, measure obtain CSI-RS that each TP sends report value, institute State and report value to include Reference Signal Received Quality RSRQ, Reference Signal Received Power RSRP, pre-coding matrix Instruction PMI and channel quality indicator (CQI), described resource management collects message for indicating each CSI-RS pair The TP answered measures antenna port；

It is synchronized to successively on other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, according to described resource Management collection message, for the orthogonal frequency division multiplex OFDM symbol at the CSI-RS place that each TP described sends Number it is demodulated, to obtain described CSI-RS corresponding for each TP, then corresponding at each TP described Measuring on CSI-RS, obtain the CSI-RS that each TP described sends reports value；

The value that reports corresponding for maximum RSRQ corresponding to each TP obtain all sync bit measurements is closed And together, form all TP reports value.

On the other hand, it is provided that the measurement apparatus of a kind of downlink channel condition information, described downlink channel condition letter The measurement apparatus of breath includes:

Sync bit acquiring unit, for synchronizing multiple service transmission point TP, obtains M synchronization Position, described M sync bit is followed successively by the first optimal synchronisation position Pos0 and other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, the value of described M is not less than the size of collaborative multimetering collection, described association It is for measuring and the TP set of feedback of down channel status information with multimetering collection；

Resource management collects message reception units, is used for being synchronized to described first sync bit Pos0, it is judged that each Whether TP have sent CSI-RS management collection message, and it is each for indicating that described resource management collects message TP corresponding for CSI-RS measures antenna port；

Lock unit, is used for being synchronized to described first optimal synchronisation position Pos0；

First reports value measuring unit, for when receiving the channel state information reference signals that service TP sends During CSI-RS management collection message, collect message according to described resource management, measure and obtain each TP transmission CSI-RS report value, described in report value to include Reference Signal Received Quality RSRQ, reference signal receive Power RSRP, pre-coding matrix instruction PMI and channel quality indicator (CQI), described resource management collects message and uses Antenna port is measured in indicating TP corresponding for each CSI-RS；

Second reports value measuring unit, for be synchronized to successively other sub-optimal sync bit Pos1, Pos2 ..., On PosM-1, collect message according to described resource management, the CSI-RS place sent for each TP described Orthogonal frequency division multiplex OFDM symbol be demodulated, to obtain described CSI-RS corresponding for each TP, so After measure on described CSI-RS corresponding for each TP, obtain the CSI-RS that each TP described sends Report value；

Report value creating unit, for the maximum corresponding to each TP all sync bit measurements obtained What RSRQ was corresponding reports value to combine, and form all TP reports value.

Another further aspect, it is provided that a kind of subscriber equipment, described subscriber equipment includes down channel shape as above The measurement apparatus of state information.

In embodiments of the present invention, multiple service transmission point TP are synchronized, obtain M sync bit, First UE is synchronized to the first optimal synchronisation position that signal intensity is maximum, measures one group of downlink channel condition letter Breath reports value, then UE is synchronized to other sub-optimal sync bit that signal intensity time is strong, measures many groups descending Reporting source of channel state information value, then to same TP, selects maximum for RSRQ one group to report value to report clothes Business TP, can improve the certainty of measurement of CSI-RS to each TP point, it is possible to provide each TP point Optimum measurement result, decrease the prior art survey to reporting value (RSRP, RSRQ, CQI, PMI) Amount mistake, and implementation complexity is low, and precision is high, has had the accurate measurement reporting value, can improve CoMP What collection selected accuracy, improves power system capacity and handling up indirectly.

Accompanying drawing explanation

Fig. 1 be the embodiment of the present invention one provide downlink channel condition information measuring method realize flow process Figure；

Fig. 2 is that the application scenarios of the measuring method of the downlink channel condition information that the embodiment of the present invention one provides shows It is intended to；

Fig. 3 is the signal that the signal that two different TP that the embodiment of the present invention one provides send arrives UE simultaneously Figure；

Fig. 4 is that 3 transmitting signals with the transmission of different delay TP of the embodiment of the present invention one offer are at UE The schematic diagram of side superposition；

Fig. 5 is the multiple relevant peaks signals not doing secondary lobe process near the main peak that the embodiment of the present invention one provides Figure；

Fig. 6 is the multiple relevant peaks signals having done secondary lobe process near the main peak that the embodiment of the present invention one provides Figure；

Fig. 7 is the structured flowchart of the measurement apparatus of the downlink channel condition information that the embodiment of the present invention two provides.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein Only in order to explain the present invention, it is not intended to limit the present invention.

In embodiments of the present invention, multiple TP are synchronized, obtain M sync bit；It is re-synchronised to First optimal synchronisation position, when each TP have sent CSI-RS management collection message, measures each The CSI-RS that TP sends reports value；It is re-synchronised on other sub-optimal sync bit, according to described resource pipe Reason collection message, the OFDM symbol at the CSI-RS place sent for each TP is demodulated, To described CSI-RS corresponding for each TP, then measure on described CSI-RS corresponding for each TP, Obtain each TP send CSI-RS report value；Corresponding to each TP finally measurement obtained The big value that reports corresponding for RSRQ combines, and form all TP reports value.

Below in conjunction with specific embodiment, the realization of the present invention is described in detail:

Embodiment one

Fig. 1 shows the realization stream of the measuring method of the downlink channel condition information that the embodiment of the present invention one provides Journey, details are as follows:

Drill for a long time in third generation partner program (3rd Generation Partnership Project, 3GPP) Enter strengthen (Long Term Evolution-Advanced, LTE-A) the 11st version (Release 11, R11), during work studies, the scene of CoMP proposes the 4th kind of operative scenario, it may be assumed that CoMP TP in collection uses same frequency to send data, and the TP in CoMP collection uses same PCID.Wherein, Launch point TP can be far end radio frequency head (Remote Radio Head, RRH) or the node B of evolution (evolved Node B, eNB), the application scenarios of concrete the method is as in figure 2 it is shown, all of RRH All using low transmitting power, be connected by optical fiber between eNB with each RRH, each RRH uses complete To antenna.

LTE-A wireless communication system uses based on OFDM (Orthogonal Frequency Division Multiplexing, the many carrier technologies based on OFDM technology.One common spy of this technology Point is to use Cyclic Prefix (Cycle Prefix, CP), and the basic role of CP technology is used to protection to be had Under conditions of multipath extension, the signal energy that multipath expands will not be to the data in adjacent OFDM symbol Interference.The length of CP needs the delay spread more than the longest multipath.But scene 4 times, as it is shown on figure 3, The signal that the TP of 2 different distance launches arrives UE side simultaneously, and it is mutual that UE side can receive from 2 TP Signal after superposition.

When scene 4 times, the PCID of these 2 TP is identical, it means that, all relevant to PCID configuration Parameter all can be identical, including: from the synchronizing signal (master sync signal (Primary of these 2 TP Synchronization Signal, PSS), from synchronizing signal (Second Synchronization Signal, SSS)) identical, the specific reference signal in community (Cell-specific reference signals, CRS) phase With.This identical, it is meant that UE side is difficult to by the signal distinguishing from the two TP out, works as the two TP be sent to the data of UE identical time, then be obtained in that Single Frequency Network merges gain, when the two TP sends During to the data difference of UE, then need the data (CoMP transmission) that collaborative the two TP sends to UE, no Then will produce co-channel interference.

Therefore, how to carry out corresponding operating, to send the information that the TP controlling message provides enough to UE, with Realizing CoMP way choice is a key issue.Owing to CRS is identical, therefore UE side can not be at CRS On be the CSI for different TP and estimate.The estimation done is needed to include based on CSI-RS: the survey of signal intensity Amount, such as Reference Signal Received Power (Reference Signal Received Power, RSRP), ginseng Examine signal receiving quality (Reference Signal Received Quality, RSRQ), descending most preferably prelist The calculating of code PMI, the calculating of downlink channel quality indicator (CQI).These are measured and calculate synchronization accuracy Requirement the highest (calculating of especially PMI).

At present in the research on standard of R11, propose to configure multiple CSI-RS by service TP to UE, enter between TP Row is coordinated, so that different TP sends different CSI-RS.And service TP and can pass through the specific Radio Resource of UE Control (Radio Resource Control, RRC) signaling tell UE be configured with which plant CSI-RS to UE, So that the CSI-RS that UE can receive according to oneself measures and estimates downlink channel condition information.

As it is shown on figure 3, be two different TP signals schematic diagrams of arriving UE simultaneously, when two TP exist certain Station spacing time, the signals that two TP come can be superimposed in UE side in the way of a fixed response time.Its effect is such as Shown in Fig. 4.

Assume that UE synchronizes on the position that the multipath signal of TP3 is the strongest, now due to TP2 Yu TP3 and TP1 And the relative transport delay inequality (station spacing generation) between TP3, may create the problem that

1, within the scope of UE has been synchronized to the CP of TP2, it is possible to the correct data demodulating TP2 to UE, but It is not synchronized on the optimum position of TP2, if therefore UE is synchronized on the position of TP3 demodulate the number of TP2 According to time, exist synchronism deviation need correct.

2, the data transmitted from TP1, sync bit has taken the data of former and later two symbols, to TP1's It is not carried out for demodulation synchronizing, and also has intersymbol interference.

3, the data that the data of asynchronous TP1 receive TP2 and TP3 to UE also can produce interference.

4, because the PCID of 3 TP is identical, even if UE has been synchronized to above TP3, but UE and does not knows yet Road this point.In other words, when UE knows the configuration of 3 different CSI-RS, which it is not aware that The transmission point of CSI-RS configuration which reality corresponding, the most also cannot correct synchronization by the resource of CSI-RS Deviation.

Therefore, scene 4 times, it would be desirable to a kind of method of design, to ensure that UE can be based on distribution multiple CSI-RS can be correct calculate UE need feedback various measurement report information.

The different station spacing TP propagation delay time situation more than CP protection is described below to an example.We Know the 1st OFDM that the length of lte-a system Normal CP is respectively in the 5.21 each subframes of μ s( Symbol) and the 4.69 each subframes of μ s(in other OFDM symbol), and station spacing is that 3km is corresponding Time delay size is 10 μ s, and time delay size corresponding for 2km is 6.67 μ s, and both configurations are likely to appearance, Now corresponding time delay is both greater than the protection length of CP.

In step S101, multiple service transmission point TP are synchronized, obtain M sync bit, Described M sync bit be followed successively by the first optimal synchronisation position Pos0 and other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, the value of described M is not less than the size of collaborative multimetering collection, described collaborative multiple spot Measuring collection is the TP set for measuring and feed back described downlink channel condition information, described down channel shape The measurement parameter of state information includes pre-coding matrix instruction PMI and channel quality indicator (CQI).

In the present embodiment, when user equipment (UE) is synchronized to described first optimal synchronisation position Pos0, then Represent that UE has been synchronized on a strongest TP point of signal.

Wherein, collaborative multimetering collection is used to carry out PMI, CQI, RI and measures and the TP set of feedback, Multiple TP is included inside this set.UE needs to measure each TP inside this set, And feed back the measurement result of PMI, CQI and RI of above-mentioned indication.To the measurement of each TP at CSI-RS Carry out in resource, for measuring the multiple TP in collection, which is assigned with and measures collection, be that network passes through RRC Signal to UE's.

Wherein it is possible to realized the synchronization of multiple service transmission point TP by two kinds of methods.

Multiple TP can be carried out by first method by the master sync signal PSS in synchronous channel SCH Synchronize.

Concrete, by the master sync signal PSS in synchronous channel SCH, multiple TP are synchronized Process is:

The CSI-RS that step 11, search signal intensity are maximum.

Step 12, it is synchronized to the CSI-RS that described signal intensity is maximum by cell search algorithms, and by sync bit Tagging is Pos0.

Concrete, UE presses cell search algorithms and realizes the synchronization to one of them the strongest CSI-RS, with The mark walked is the solution levelling of Physical Broadcast Channel (Physical Broadcast Channel, PBCH) Really, and be Pos0 by the strongest position mark.

Wherein, cell search algorithms is prior art, and the execution process of specific algorithm comprises the following steps:

Step 1: carry out the detection of main synchronizing sequence；

Step 2: carry out the detection from synchronizing sequence；

Step 3: calculate cell ID by step 1, the 2 master and slave synchronizing sequences detected, then press The cell ID detected carries out the detection of Physical Broadcast Channel, if Physical Broadcast Channel detects successfully, then Cell search process completes, otherwise failure, needs to carry out the detection again of above-mentioned 3 steps in new position.

After cell searching completes, UE is obtained in that following information: Physical Cell Identifier, synchronize accurately Position, CP type, System Frame Number and the subframe numbers of mobile radio system, wherein, physical broadcast is believed The starter system message included in road includes system bandwidth etc..

After completing cell search algorithms, the access mobile radio system that UE could be correct, also could calculate Really have found the Time and Frequency Synchronization point that can work.

Step 13, before and after described Pos0, choose L correlation corresponding to sampled point do many minor peaks and combine inspection Surveying, obtain the peak that M-1 signal intensity time is strong, the numerical value of L is that the maximum transmitted that station spacing is brought is prolonged The number of the sampled point corresponding to the time late.

In the present embodiment, before and after Pos0, first choose L correlation corresponding to sampled point do a minor peaks associating Detection, and multiple correlation peaks near the main peak obtained (local maximum, more some than the most adjacent Individual value will big value be referred to as peak value), these peak values be the secondary lobe of peak value is not done zero setting process result, As it is shown in figure 5, be the multiple schematic diagrams not doing the relevant peaks that secondary lobe processes near main peak；Again by L sampling The peak value of the predetermined number in the correlation that point is corresponding retains, and the secondary lobe on peak value side is (adjacent with pre-and post-peaking The most multiple values lower than peak value) zero setting.Repeat above-mentioned step, do n times peak value joint-detection continuously (such as 4 times), obtains M-1 strong peak, and as shown in Figure 6, multiple near main peak have done secondary lobe The relevant peaks schematic diagram processed.

As a preferred embodiment of the present invention, the criterion retained as secondary strong peak is, continuously N times detection in, will appear from number of times and exceed prominent M-1 position work of thresholding (such as 2 times) number of times For secondary strong peak.

Concrete, the magnitude value of L depend on the maximum station spacing under scene 4 that mobile communication system define with Sampling bandwidth in synchronizing channel during synchronization.As a example by the distance between sites of 3km, corresponding time delay is 10 μ s, If baseband bandwidth during PSS channel synchronization is 1.92MHz, then corresponding L-value is 19.2, by rounding up, It is 20.The L-value that 2km station spacing is corresponding accordingly is 13.I.e. in this example, need to take before and after Pos0 L(3km correspondence 20,2km correspondence 13) correlation peak that individual sampled point is corresponding, the numerical value of L is station spacing The number of the sampled point corresponding to the maximum traffic delay time brought.

Step 14, using peak time strong for described M-1 signal intensity as sub-optimal sync bit, mark respectively It is designated as Pos1, Pos2 ..., PosM-1.

The concrete execution process of second method is:

Step 21, by cell search algorithms, obtain the first sync bit Pos0.

Step 22, centered by described first sync bit Pos0, move the step-length of predetermined number the most respectively Lx, obtains other sync bit of predetermined number, and wherein, the numerical value of step-length Lx is less than cyclic prefix CP length.

In the present embodiment, preset specific step-length Lx, move respectively to forward and backward centered by Pos0 Step-length Lx of predetermined number, i.e. can get multiple preferably sync bit.I.e. Pos1=Pos0-Lx, Pos2= Pos0+Lx,Pos3=Pos0-2Lx,Pos3=Pos0+2Lx。

Lx value choose can simultaneously cyclic prefix CP length and the number of position that takes before and after Pos0, as Under the station spacing of 2km, Lx value can be the CP length of 0.8 times, and principle is the length that Lx is more preferably less than CP.

In step s 102, it is synchronized to described first optimal synchronisation position Pos0, sends out when receiving service TP During the channel state information reference signals CSI-RS management collection message sent, execution step S103, otherwise, Stopping not perform follow-up step, wherein, described resource management collects message for indicating each CSI-RS Corresponding TP measures antenna port.

Wherein, according to the data received from service TP, subscriber equipment judges whether that receiving service TP sends CSI-RS management collection message, concrete judge process is:

First go out business datum from the extracting data received, and described business datum is demodulated, obtain User's specific radio resource control RRC signaling, more described RRC signaling is demodulated, detection is described Whether RRC signaling including, the resource management being sent to the relevant CSI-RS of UE collects message, if it is, Then represent UE receive service TP send CSI-RS management collection message, if it is not, then indicate without Service TP in line communication system does not configure multiple CSI-RS for UE, that is represents UE work Under need not the pattern being reported multiple spot CSI by CSI-RS, therefore need not perform the follow-up of the present invention Step, otherwise, performs step S103.

Current above-mentioned state is that conclusion has been reached in LTE-A Rel-11 meeting, the field of RRC signaling and interior Hold and do not form corresponding specification.The management of relevant CSI-RS collects the content of message the most clearly, Including herein below:

The sequence scrambler carrying out CSI-RS reference signal generation initializes the initial cell identification information (mark needed It is designated as X), CSI-RS port numbers, CSI-RS number, the configuration of each CSI-RS (includes son Frame offset value configures, the frequency position in OFDM symbol position that CSI-RS occurs in subframe and RB Put configuration).

In step s 103, collect message according to described resource management, measure and obtain the CSI-RS that each TP sends Report value, described in report value include Reference Signal Received Quality RSRQ, Reference Signal Received Power RSRP, Pre-coding matrix instruction PMI and channel quality indicator (CQI).

In the present embodiment, first collect message according to described resource management, measure and obtain what each TP sent The RSRQ of CSI-RS, obtains one-shot measurement result.As shown in table 1, wherein X1 represents and distributes to wherein CSI-RS serial number (in the initial scrambling code value of scrambler sequence that corresponding CSI-RS is used of 1 TP Individual parameter), antennaPortsCount1 is allocated to the antenna port number of wherein 1 TP antenna, it is assumed that The top-quality TP corresponding to X1 of CSI-RS arrived.

CSI-RS serial number (corresponding TPs)	CSI-RS quality
		(X1, antennaPortsCount1)	RSRQ01
(X2, antennaPortsCount2)	RSRQ02
		(X3, antennaPortsCount3)	RSRQ03

Table 1

Again maximum Xi(corresponding for RSRQ each TP in a CoMP collection there is an Xi therewith Corresponding) corresponding CSI-RS as the most optimal launch point TP, come with CSI-RS corresponding for this TP Carrying out essence synchronization, the second optimal synchronisation position obtaining essence synchronization is Pos0 '；Wherein, described essence synchronizes to be table Showing the higher synchronization of precision, be for the synchronization in step S101, this is subsynchronous is to choose RSRQ The synchronization that the CSI-RS on TP that value is maximum is carried out, so comparing and the sync bit that obtains in step S101 The precision put is higher, so referred to as essence synchronizes.

Being synchronized to described second optimal synchronisation position Pos0 ', measurement obtains the upper of the CSI-RS of each TP transmission Report value, obtains one group of measurement result, as shown in table 2.

Table 2

In step S104, it is synchronized to other sub-optimal sync bit Pos1, Pos2 ..., PosM-1 successively On, collect message according to described resource management, for the orthogonal frequency at the CSI-RS place that each TP described sends Multiplexing OFDM symbol is divided to be demodulated, to obtain described CSI-RS corresponding for each TP, then described Measuring on the CSI-RS that each TP is corresponding, obtain the CSI-RS that each TP described sends reports value.

In the present embodiment, first UE is synchronized to other sub-optimal sync bit Pos1, Pos2 ..., PosM-1 On, collect message according to described resource management, for the orthogonal frequency division multiplexing at the CSI-RS place that each TP sends Be demodulated by OFDM symbol, to obtain described CSI-RS corresponding for each TP, then described each Measure on the CSI-RS that TP is corresponding, obtain each TP RSRQ (similar with table 1, simply measure Result different)；Again to same TP, compare to be synchronized on other sync bit measure the RSRQ obtained and be When no ratio is synchronized to the first optimal synchronisation position Pos0 or the second optimal synchronisation position Pos0 ', measurement obtains RSRQ is big；If it is, after CSI-RS corresponding for described TP is carried out essence synchronization, then measure described TP The CSI-RS sent reports value, if it is not, then perform step S105.

In step S105, the maximum RSRQ corresponding to each TP that all sync bit measurements are obtained The corresponding value that reports combines, and form all TP reports value, reports service TP.

Multiple service transmission point TP are synchronized, obtain M sync bit, first by UE by the present embodiment It is synchronized to the first optimal synchronisation position that signal intensity is maximum, measures one group of downlink channel condition information and report value, UE is synchronized to other sub-optimal sync bit that signal intensity time is strong again, measures many group downlink channel condition letters Breath reports value, then to same TP, selects maximum for RSRQ one group to report value to report service TP, can To improve the certainty of measurement of the CSI-RS to each TP point, it is possible to provide the optimal survey of each TP point Amount result, decreases prior art to reporting the measurement mistake of value (RSRP, RSRQ, CQI, PMI), And implementation complexity is low, precision is high, has had the accurate measurement reporting value, can improve the choosing of CoMP collection Select accuracy, indirectly improve power system capacity and handling up.

Embodiment two

Fig. 7 shows the structural frames of the measurement apparatus of the downlink channel condition information that the embodiment of the present invention two provides Figure, in the present embodiment, this device can be the software unit in subscriber equipment, hardware cell or soft or hard The unit that part combines, described subscriber equipment can constitute radio communication system with base station and multiple launch point TP System, described device includes: sync bit acquiring unit 71, lock unit 72, first report value measuring unit 73, second report value measuring unit 74 and report value creating unit 75.

Wherein, sync bit acquiring unit 71, for multiple service transmission point TP are synchronized, obtain M sync bit, described M sync bit is followed successively by the first optimal synchronisation position Pos0 and other is sub-optimal Sync bit Pos1, Pos2 ..., PosM-1, the value of described M is big not less than collaborative multimetering collection Little, described collaborative multimetering collection is the TP set for measuring and feed back described downlink channel condition information, The measurement parameter of described downlink channel condition information includes pre-coding matrix instruction PMI and channel quality instruction CQI；

Lock unit 72, is used for being synchronized to described first optimal synchronisation position Pos0；

First reports value measuring unit 73, for when receiving the channel condition information reference letter that service TP sends During number CSI-RS management collection message, collect message according to described resource management, measure and obtain each TP and send out The CSI-RS sent reports value, described in report value to include Reference Signal Received Quality RSRQ, reference signal connect Receiving power RSRP, pre-coding matrix instruction PMI and channel quality indicator (CQI), described resource management collects message For indicating TP corresponding for each CSI-RS to measure antenna port；

Second reports value measuring unit 74, for be synchronized to successively other sub-optimal sync bit Pos1, On Pos2 ..., PosM-1, collect message according to described resource management, the CSI-RS sent for each TP described The orthogonal frequency division multiplex OFDM symbol at place is demodulated, to obtain described CSI-RS corresponding for each TP, Then measure on described CSI-RS corresponding for each TP, obtain the CSI-RS that each TP described sends Report value；

Report value creating unit 75, for corresponding to each TP that all sync bit measurements are obtained The big value that reports corresponding for RSRQ combines, and form all TP reports value.

It addition, the measurement apparatus of downlink channel condition information also includes: message judging unit, this message judges Unit is for judging whether to receive the CSI-RS management collection message of service TP transmission.

Concrete, described message judging unit includes: signaling extraction module and signaling detection module.

Wherein, signaling extraction module, for going out business datum from the extracting data received, and to described Business datum is demodulated, and obtains user's specific radio resource control RRC signaling；

Signaling detection module, for being demodulated described RRC signaling, detects in described RRC signaling and is The no relevant CSI-RS management collection message including being sent to UE, if it is, represent that UE receives The CSI-RS management collection message that service TP sends.

Concrete, described first reports value measuring unit 73 to include: a RSRQ measurement module, essence are same Step is put acquisition module and first and is reported value measurement module.

Wherein, a RSRQ measurement module, for collecting message according to described resource management, measure and obtain respectively The RSRQ of the CSI-RS that individual TP sends；

Essence sync bit acquisition module, for maximum CSI-RS corresponding for RSRQ being carried out essence synchronization, Obtain the second optimal synchronisation position Pos0 '；

First reports value measurement module, is used for being synchronized to described second optimal synchronisation position Pos0 ', and measurement obtains The CSI-RS that each TP sends reports value.

Concrete, described second reports value measuring unit 74 to include: CSI-RS acquisition module, the 2nd RSRQ Measurement module and second reports value measurement module.

Wherein, CSI-RS acquisition module, for collecting message according to described resource management, send out for each TP The orthogonal frequency division multiplex OFDM symbol at the CSI-RS place sent is demodulated, to obtain each TP described Corresponding CSI-RS；

2nd RSRQ measurement module, for measuring on described CSI-RS corresponding for each TP, RSRQ to each TP described；

Second reports value measurement module, for same TP, if being synchronized on other sync bit measure To RSRQ ratio be synchronized to the first optimal synchronisation position Pos0 or the second optimal synchronisation position Pos0 ' time measure The RSRQ obtained is big, then after CSI-RS corresponding for described TP carries out essence synchronization, then measurement obtains described The CSI-RS that TP sends reports value.

Concrete, described sync bit acquiring unit 71 is by the master sync signal PSS in synchronous channel SCH Synchronizing multiple TP, described sync bit acquiring unit 71 includes: signal search module, first Optimal synchronisation position acquisition module, peak acquisition module and first time best placement acquisition module.

Wherein, signal search module, for searching for the CSI-RS that signal intensity is maximum；

First optimal synchronisation position acquisition module, maximum for being synchronized to described signal intensity by cell search algorithms CSI-RS, and sync bit is labeled as Pos0；

Peak acquisition module, does many for choosing L correlation corresponding to sampled point before and after described Pos0 Minor peaks joint-detection, obtains the peak that M-1 signal intensity time is strong, and the numerical value of L is that station spacing is brought The number of the sampled point corresponding to the maximum traffic delay time；

Best placement acquisition module for the first time, is used for peak strong for described M-1 signal intensity time as secondary Good sync bit, is respectively labeled as Pos1, Pos2 ..., PosM-1.

Concrete, the strong peak of described M-1 signal intensity time is in continuous print many minor peaks joint-detection In, occurrence number exceedes the secondary strong peak of M-1 signal intensity of pre-determined threshold number of times.

Concrete, described peak acquisition module is by presetting in correlation corresponding for described L sampled point The peak value of number retains, the secondary lobe zero setting on peak value side.

Concrete, described sync bit acquiring unit 71 also includes: the second optimal synchronisation position acquisition module and Best placement acquisition module for the second time.

Wherein, the second optimal synchronisation position acquisition module, for by cell search algorithms, obtain first same Step puts Pos0；

Best placement acquisition module for the second time, for centered by described first sync bit Pos0, front and back distinguishes Step-length Lx of mobile predetermined number, obtains other sync bit of predetermined number, wherein, the numerical value of step-length Lx Less than cyclic prefix CP length.

The subscriber equipment that the embodiment of the present invention provides can be applied in the embodiment of the method one of aforementioned correspondence, in detail Feelings see above-described embodiment one description, do not repeat them here.

It should be noted that in said system embodiment, included unit is according to function logic Carry out dividing, but be not limited to above-mentioned division, as long as being capable of corresponding function；It addition, The specific name of each functional unit, also only to facilitate mutually distinguish, is not limited to the protection of the present invention Scope.

It addition, one of ordinary skill in the art will appreciate that the whole or portion realizing in the various embodiments described above method The program that can be by step by step completes to instruct relevant hardware, and corresponding program can be stored in a meter In calculation machine read/write memory medium, described storage medium, such as ROM/RAM, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention Protection domain within.

Claims (21)

1. the measuring method of a downlink channel condition information, it is characterised in that described method includes:

Multiple service transmission point TP are synchronized, obtains M sync bit, described M sync bit It is followed successively by the first optimal synchronisation position Pos0 and other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, The value of described M not less than the size of collaborative multimetering collection, described collaborative multimetering collection be for measuring and Feed back the TP set of described downlink channel condition information；

It is synchronized to described first optimal synchronisation position Pos0；

When receiving the channel state information reference signals CSI-RS management collection message that service TP sends Time, collect message according to described resource management, measure obtain CSI-RS that each TP sends report value, institute State and report value to include Reference Signal Received Quality RSRQ, Reference Signal Received Power RSRP, pre-coding matrix Instruction PMI and channel quality indicator (CQI), described resource management collects message for indicating each CSI-RS pair The TP answered measures antenna port；

It is synchronized to successively on other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, according to described resource Management collection message, for the orthogonal frequency division multiplex OFDM symbol at the CSI-RS place that each TP described sends Number it is demodulated, to obtain described CSI-RS corresponding for each TP, then corresponding at each TP described Measuring on CSI-RS, obtain the CSI-RS that each TP described sends reports value；

The value that reports corresponding for maximum RSRQ corresponding to each TP obtain all sync bit measurements is closed And together, form all TP reports value.

2. the method for claim 1, it is characterised in that collecting message according to described resource management, Measure obtain each TP send CSI-RS report value before, described method also includes:

Judge whether to receive the CSI-RS management collection message that service TP sends.

3. method as claimed in claim 2, it is characterised in that described in judge whether to receive service TP The CSI-RS management collection message sent specifically includes:

Go out business datum from the extracting data received, and described business datum is demodulated, used Family specific radio resource control RRC signaling；

Described RRC signaling is demodulated, detects in described RRC signaling whether include CSI-RS Management collection message, if it is, represent and receive the CSI-RS management collection message that service TP sends.

4. the method for claim 1, it is characterised in that described collect message according to described resource management, The value that reports measuring the CSI-RS obtaining each TP transmission includes:

Collect message according to described resource management, measure the RSRQ obtaining the CSI-RS that each TP sends；

Maximum CSI-RS corresponding for RSRQ is carried out essence synchronization, obtains the second optimal synchronisation position Pos0 '；

Being synchronized to described second optimal synchronisation position Pos0 ', measurement obtains the upper of the CSI-RS of each TP transmission Report value.

5. method as claimed in claim 4, it is characterised in that described collect message according to described resource management, Orthogonal frequency division multiplex OFDM symbol for the CSI-RS place of each TP described transmission is demodulated, with Obtain described CSI-RS corresponding for each TP, then survey on described CSI-RS corresponding for each TP Amount, the value that reports obtaining the CSI-RS that each TP described sends includes:

Message is collected, for the orthogonal frequency division multiplexing at the CSI-RS place that each TP sends according to described resource management It is demodulated by OFDM symbol, to obtain described CSI-RS corresponding for each TP；

Described CSI-RS corresponding for each TP measures, obtains the RSRQ of each TP described；

To same TP, if being synchronized on other sync bit to measure the RSRQ ratio obtained to be synchronized to first The RSRQ that during good sync bit Pos0 or the second optimal synchronisation position Pos0 ', measurement obtains is big, then to described CSI-RS corresponding for TP carry out essence synchronize after, then measure obtain described TP send CSI-RS report value.

6. the method for claim 1, it is characterised in that described multiple service transmission point TP are entered Row synchronizes, and obtains M sync bit, is followed successively by the first optimal synchronisation position Pos0 and other sub-optimal synchronization Position Pos1, Pos2 ..., PosM-1 specifically include:

By the master sync signal PSS in synchronous channel SCH, multiple TP are synchronized.

7. method as claimed in claim 6, it is characterised in that described by synchronous channel SCH Master sync signal PSS carries out synchronization to multiple TP and specifically includes:

The CSI-RS that search signal intensity is maximum；

It is synchronized to, by cell search algorithms, the CSI-RS that described signal intensity is maximum, and sync bit is labeled as Pos0；

Before and after described Pos0, choose L correlation corresponding to sampled point do many minor peaks joint-detection, obtain The peak that M-1 signal intensity time is strong, the numerical value of L is the maximum traffic delay time institute that station spacing is brought The number of corresponding sampled point；

Using peak strong for described M-1 signal intensity time as sub-optimal sync bit, it is respectively labeled as Pos1、Pos2、…、PosM-1。

8. method as claimed in claim 7, it is characterised in that the peak that described M-1 signal intensity time is strong Value position is in continuous print many minor peaks joint-detection, and occurrence number exceedes M-1 of pre-determined threshold number of times The peak that signal intensity time is strong.

9. method as claimed in claim 7, it is characterised in that described choose L before and after described Pos0 and adopt The correlation that sampling point is corresponding do many minor peaks joint-detection particularly as follows:

The peak value of the predetermined number in correlation corresponding for described L sampled point is retained, the secondary lobe on peak value side Zero setting.

10. the method for claim 1, it is characterised in that described multiple service transmission point TP are entered Row synchronizes, and obtains M sync bit, be followed successively by the first sync bit Pos0 and other sync bit Pos1, Pos2 ..., PosM-1 particularly as follows:

By cell search algorithms, obtain the first sync bit Pos0；

Centered by described first sync bit Pos0, move step-length Lx of predetermined number the most respectively, obtain Other sync bit of predetermined number, wherein, the numerical value of step-length Lx is less than cyclic prefix CP length.

The measurement apparatus of 11. 1 kinds of downlink channel condition informations, it is characterised in that described device includes:

Sync bit acquiring unit, for synchronizing multiple service transmission point TP, obtains M synchronization Position, described M sync bit is followed successively by the first optimal synchronisation position Pos0 and other sub-optimal sync bit Pos1, Pos2 ..., PosM-1, the value of described M is not less than the size of collaborative multimetering collection, described association It is the TP set for measuring and feed back described downlink channel condition information with multimetering collection；

Lock unit, is used for being synchronized to described first optimal synchronisation position Pos0；

First reports value measuring unit, for when receiving the channel state information reference signals that service TP sends During CSI-RS management collection message, collect message according to described resource management, measure and obtain each TP transmission CSI-RS report value, described in report value to include Reference Signal Received Quality RSRQ, reference signal receive Power RSRP, pre-coding matrix instruction PMI and channel quality indicator (CQI), described resource management collects message and uses Antenna port is measured in indicating TP corresponding for each CSI-RS；

Second reports value measuring unit, for be synchronized to successively other sub-optimal sync bit Pos1, Pos2 ..., On PosM-1, collect message according to described resource management, the CSI-RS place sent for each TP described Orthogonal frequency division multiplex OFDM symbol be demodulated, to obtain described CSI-RS corresponding for each TP, so After measure on described CSI-RS corresponding for each TP, obtain the CSI-RS that each TP described sends Report value；

Report value creating unit, for the maximum corresponding to each TP all sync bit measurements obtained What RSRQ was corresponding reports value to combine, and form all TP reports value.

The measurement apparatus of 12. downlink channel condition informations as claimed in claim 11, it is characterised in that institute State device also to include:

Message judging unit, for judging whether that the CSI-RS management collection receiving service TP transmission disappears Breath.

The measurement apparatus of 13. downlink channel condition informations as claimed in claim 12, it is characterised in that institute State message judging unit to include:

Signaling extraction module, for going out business datum from the extracting data received, and to described business number According to being demodulated, obtain user's specific radio resource control RRC signaling；

Signaling detection module, for being demodulated described RRC signaling, detects in described RRC signaling and is No include CSI-RS management collection message, if it is, represent receive service TP send CSI-RS Resource management collects message.

The measurement apparatus of 14. downlink channel condition informations as claimed in claim 11, it is characterised in that institute Stating first reports value measuring unit to include:

Oneth RSRQ measurement module, for collecting message according to described resource management, measures and obtains each TP The RSRQ of the CSI-RS sent；

Essence sync bit acquisition module, for maximum CSI-RS corresponding for RSRQ being carried out essence synchronization, Obtain the second optimal synchronisation position Pos0 '；

First reports value measurement module, is used for being synchronized to described second optimal synchronisation position Pos0 ', and measurement obtains The CSI-RS that each TP sends reports value.

The measurement apparatus of 15. downlink channel condition informations as claimed in claim 14, it is characterised in that institute Stating second reports value measuring unit to include:

CSI-RS acquisition module, for collecting message according to described resource management, sends for each TP The orthogonal frequency division multiplex OFDM symbol at CSI-RS place is demodulated, corresponding to obtain each TP described CSI-RS；

2nd RSRQ measurement module, for measuring on described CSI-RS corresponding for each TP, RSRQ to each TP described；

Second reports value measurement module, for same TP, if being synchronized on other sync bit measure To RSRQ ratio be synchronized to the first optimal synchronisation position Pos0 or the second optimal synchronisation position Pos0 ' time measure The RSRQ obtained is big, then after CSI-RS corresponding for described TP carries out essence synchronization, then measurement obtains described The CSI-RS that TP sends reports value.

The measurement apparatus of 16. downlink channel condition informations as claimed in claim 11, it is characterised in that institute State sync bit acquiring unit by the master sync signal PSS in synchronous channel SCH, multiple TP to be carried out Synchronize.

The measurement apparatus of 17. downlink channel condition informations as claimed in claim 16, it is characterised in that institute State sync bit acquiring unit to include:

Signal search module, for searching for the CSI-RS that signal intensity is maximum；

First optimal synchronisation position acquisition module, for being synchronized to described signal intensity by cell search algorithms Big CSI-RS, and sync bit is labeled as Pos0；

Peak acquisition module, does many for choosing L correlation corresponding to sampled point before and after described Pos0 Minor peaks joint-detection, obtains the peak that M-1 signal intensity time is strong, and the numerical value of L is that station spacing is brought The number of the sampled point corresponding to the maximum traffic delay time；

Best placement acquisition module for the first time, for using secondary for described M-1 signal intensity strong peak as Sub-optimal sync bit, is respectively labeled as Pos1, Pos2 ..., PosM-1.

The measurement apparatus of 18. downlink channel condition informations as claimed in claim 17, it is characterised in that institute Stating the strong peak of M-1 signal intensity time is in continuous print many minor peaks joint-detection, occurrence number Exceed the peak that M-1 the signal intensity time of pre-determined threshold number of times is strong.

The measurement apparatus of 19. downlink channel condition informations as claimed in claim 17, it is characterised in that institute Stating peak acquisition module is to be protected by the peak value of the predetermined number in correlation corresponding for described L sampled point Stay, the secondary lobe zero setting on peak value side.

The measurement apparatus of 20. downlink channel condition informations as claimed in claim 11, it is characterised in that institute State sync bit acquiring unit also to include:

Second optimal synchronisation position acquisition module, for by cell search algorithms, obtains the first sync bit Pos0；

Best placement acquisition module for the second time, for centered by described first sync bit Pos0, front and back distinguishes Step-length Lx of mobile predetermined number, obtains other sync bit of predetermined number, wherein, the numerical value of step-length Lx Less than cyclic prefix CP length.

21. 1 kinds of subscriber equipmenies, it is characterised in that described subscriber equipment includes such as claim 11 to 20 The measurement apparatus of the downlink channel condition information described in any one.