CN105991244A - Method and equipment for measuring and reporting channel state information - Google Patents

Abstract

The invention discloses a method and equipment for measuring and reporting channel state information (CSI). According to one embodiment, the method for measuring and reporting CSI comprises the following steps: user equipment (UE) measures CSI on multiple types of downlink signals; and the UE feeds back the CSI measured based on the multiple types of downlink signals. By adopting the embodiment of the invention, as CSI measurement on multiple types of downlink signals is allowed, UE's chance of measuring CSI is increased, the precision of CSI measurement is improved, and the most effective CSI can be fed back.

Description

Measure and the method and apparatus of reporting channel status information

Technical field

The disclosure relates generally to wireless communication field, is specifically related to CSI back, Particularly relate to Long Term Evolution (LTE) system is measured and reports the method for CSI, subscriber equipment And base station.

Background technology

Along with the contradiction day that user is rare with frequency spectrum resource to the outburst of high broadband wireless services demand Benefit is sharp-pointed, and mobile operator starts to consider to exempt from licensed band supplementing as licensed band.Cause This, bring into schedule in the research exempting to dispose in licensed band LTE.Fig. 1 shows polymerization license Frequency range and the schematic diagram exempting from licensed band.As it is shown in figure 1, can in the coverage of macrocell There is multiple small-cell or Wireless Fidelity (WiFi, Wireless Fidelity) access point (WiFi AP).These small-cells and WiFi AP can use mandate frequency range by the way of carrier aggregation With unauthorized frequency range (namely licensed band and exempt from licensed band).Third generation partner program (3GPP) research is had started to, by exempting from effective carrier aggregation of licensed band and licensed band, How to ensure not to exempting from the premise of other technology of licensed band do not causes and significantly affect, effectively Improve the whole network availability of frequency spectrum.

Exempt from licensed band typically the most the allocated for certain other purposes, such as, radar or The Wireless Fidelity (WiFi, Wireless Fidelity) of 802.11 series.So, license is being exempted from In frequency range, its interference level has uncertainty, and this causes the quality of service (QoS) of LTE transmission Typically it is relatively difficult to ensure.But, still can be the highest for qos requirement exempting from licensed band Data transmission.Here, LTE-U will be referred to as in the LTE system exempting to dispose in licensed band System.Exempting from licensed band, how to avoid LTE-U system and radar or WiFi etc. its Interfering of his wireless system, is a crucial problem.Carrier sense (CCA) be Exempt from one commonly used in licensed band and avoid contention mechanism.One mobile station (STA) exists Wireless channel have to be detected, only when this wireless channel free time being detected before sending signal Just can take this wireless channel and send signal.LTE-U is also required to follow similar mechanism, with Ensure less to the interference of other signals.Relatively simple method is, LTE-U equipment (base station Or terminal use) according to CCA result dynamic switch, i.e. monitor channel idle and i.e. send, if Channel is busy, does not sends.

In LTE system, especially downlink, in order to support the link circuit self-adapting merit of base station side Can, UE need to report to base station downlink channel condition information (Channel state information, CSI).UE based on descending pilot frequency, such as cell common reference signal (Cell specific Reference signal, CRS) or non-zero power channel state information reference signals (Non-zero Power channel state information reference signal, NZP-CSI-RS) or zero energy Channel state information reference signals (zero-power CSI-RS, ZP-CSI-RS), measures channel matter Amount, and channel quality instruction (Channel quality indicator, CQI) is reported base station. UE can periodically report CQI, it is possible to is reported CQI by base station triggers UE aperiodicity.Existing Be periodically to send for the descending pilot frequency measuring channel quality, therefore, UE can be based on These signals, it is thus achieved that single or multiple channel quality samples also merge, produce corresponding CQI, and report base station.

Exempting from licensed band, owing to LTE-U equipment determines according to CCA result dynamic switch Whether send signal.Accordingly, it is possible to there is the long period, LTE-U equipment does not sends any letter Number, thus cause UE can not carry out the channel strength measurement of CSI based on pilot signal.If UE The CQI reported based on the channel strength before the long period, then cannot report by real embodiment UE Time channel strength.Additionally, due to LTE-U base station is when dispatching UE, its around base station Its wireless communication system is generally in temporary close state, does not the most send signal, and works as LTE-U Base station is vacant when exempting from licensed band carrier resource, and other wireless communication system around base station can Open mode can be in, i.e. send signal.Interference level under both of these case is different. If the CQI that UE reports can react the LTE-U base station channel quality when dispatching UE completely, It could provide reference more accurately for base station scheduling.The CQI how making UE report can be more The real reflection LTE-U base station channel quality when dispatching UE, to realize base station to user Efficient scheduling, be a problem needing solution badly.

It should be noted that introduction to technical background above is intended merely to the convenient technical side to the present invention Case carries out clear, complete explanation, and facilitates the understanding of those skilled in the art to illustrate. Can not be merely because these schemes be set forth at the background section of the present invention and think above-mentioned Technical scheme is known to those skilled in the art.

Summary of the invention

In order to solve the problems referred to above, this application provides a kind of for measuring and reporting channel state The method of information CSI and subscriber equipment.

First aspect, it is provided that a kind of measurement and the method for report CSI.The method includes: use Family equipment UE measures CSI on polytype downstream signal；And described UE feedback based on The CSI that described polytype downstream signal measurement obtains.

In certain embodiments, downstream signal based at least one type following measurement CSI: The reference signal measured for CSI sent in the time that base station sends downlink data；Base station is sent out Discovery reference signal DRS sent；And the reference signal being exclusively used in CSI measurement that base station sends.

In certain embodiments, described method also includes: if UE is the most not Receiving the signal that base station sends, the most described UE is invalid to described base station instruction CSI, or, Described UE indicates current channel disturbance level to described base station.

In certain embodiments, described UE indicates current channel disturbance level to described base station Including: only when not receiving the signal that base station sends in the window that the CSI configured in base station measures Time, described UE just indicates to the pure interference level of described base station feedback.

In certain embodiments, the DRS sent based on base station measures CSI and includes following arbitrary: The reference signal directly DRS measured as CSI；The multiple ginsengs comprised after DRS is extended Examine signal port to measure for CSI；And based on the use configured in DRS via high-level signaling The reference signal measured in CSI carries out CSI measurement.

In certain embodiments, the described multiple reference signal ports use that will comprise after DRS extension Measure in CSI, including following at least one: by all subframes of DRS or parton Multiple CRS ports that on frame, expanding packet contains are measured for CSI；And by all sons of DRS On frame or multiple CSI-RS ports that in part subframe, expanding packet contains are measured for CSI.

In certain embodiments, described high-level signaling is configured to the public ginseng in community that CSI measures Examine the cycle of signal CRS, skew and time span.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, including: feed back that to exempt from licensed band many when needing to take identical resource During individual CSI, according to predetermined priority feedback CSI, wherein said predetermined priority includes Arbitrary: effectiveness tool based on the CSI that described polytype downstream signal measurement obtains There is limit priority；And CSI report type has limit priority, based on described multiple types The effectiveness of the CSI that the downstream signal measurement of type obtains has and is only below the excellent of CSI report type First level.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, including: feed back exempt from the CSI of licensed band when needing to take identical resource During with the CSI of licensed band, determine priority according to frequency range type；Or, by licensed band CSI and the CSI exempting from licensed band together with sort according to effectiveness, wherein said license frequency The CSI of section has predetermined effectiveness.

In certain embodiments, the predetermined effectiveness of the CSI of described licensed band includes following Arbitrary: the effectiveness of the CSI of licensed band higher than exempt from licensed band based under polytype The CSI of row signal measurement；The effectiveness of the CSI of licensed band less than exempt from licensed band based on The CSI that polytype downstream signal measurement obtains；And the effectiveness of the CSI of licensed band Less than exempting from the CSI obtained based on downlink data transmission measurement of licensed band, but be above based on DRS and the CSI obtained based on the reference signal measurement being exclusively used in CSI measurement.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, also includes: the identification information of the CSI that described UE report is fed back, institute State identification information include following at least one: corresponding cell ID, CSI process identifier and CSI Effectiveness type.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, including: only feed back based on a type of descending during a CSI The CSI that signal measurement obtains.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, including: can feed back based on described polytype during a CSI The CSI that obtains of downstream signal measurement.

In certain embodiments, when feeding back during a CSI based on polytype descending During the CSI that signal measurement obtains, the interference sections measured according to following either type process CSI: Average operation is carried out in the subframe measuring only identical in type signal of interference sections；Not to dry The measurement disturbing part is averaged operation；And based on corresponding to different types of downstream signal The measurement of interference sections is weighted averagely by interference level.

In certain embodiments, when feeding back during a CSI based on polytype descending During the CSI that signal measurement obtains, according to the interference level corresponding to different types of downstream signal, The CSI obtained based on different types of downstream signal measurement is compensated operation.

In certain embodiments, described compensating operation includes following arbitrary: described UE adds up it Send the interference level A during downlink data in base station, and send DRS or specially in base station Interference level B during the reference signal that CSI measures, comes according to interference level A and B Compensate the signal to noise ratio that its CSI measurement obtains；And the corresponding high interference water of instruction handle according to base station The power of the channel strip that CSI measurement at ordinary times obtains improves predetermined value, or, corresponding high level cadre When disturbing level, the power of the interference sections that CSI measurement obtains reduces described predetermined value.

In certain embodiments, described UE feedback is surveyed based on described polytype downstream signal The CSI measured, including: according to following either type feedback order instruction RI and each bandwidth portion Divide the subband pre-coding matrix instruction/channel quality instruction PMI/CQI of BP: according to the last time The signal type that report RI is based on, based on same type of signal, feeds back in whole bandwidth The PMI/CQI of all BP；Assume the RI RI equal to the last time report, based on the last time The downstream signal of base station busy channel feeds back the PMI/CQI of each BP；Assume that RI is equal to recently The RI once reported, when new can be used for the priority measuring the signal type of CSI higher than previous During secondary signal type, downstream signal based on the last base station busy channel feeds back each BP PMI/CQI；And when new can be used for the priority measuring the signal type of CSI higher than front During signal type once, provide from the Physical Uplink Control Channel PUCCH meeting processing delay Source starts, and feeds back the PMI/CQI of RI based on new signal categorical measures and each BP.

Second aspect, it is provided that a kind of method of receiving channel state information CSI.Described method Including: base station sends polytype downstream signal and measures for CSI；And receive user The CSI obtained based on described polytype downstream signal measurement of equipment UE feedback.

In certain embodiments, described polytype downstream signal include following at least one: The reference signal measured for CSI sent in sending the time of downlink data；Find with reference to letter Number DRS；And it is exclusively used in the reference signal that CSI measures.

In certain embodiments, send DRS and include for CSI measurement following arbitrary: directly DRS is used as the reference signal that CSI measures；DRS is to comprise multiple reference signal end in extension Mouth is measured for CSI；And be arranged in the DRS time period for CSI via high-level signaling The reference signal measured.

In certain embodiments, receive UE feedback based on described polytype downstream signal Measure the CSI that obtains, including: receive during a CSI be based only upon a type of under The CSI that row signal measurement obtains；Or receive based on described multiple types during a CSI The CSI that the downstream signal measurement of type obtains.

In certain embodiments, when receiving during a CSI based on polytype descending During the CSI that signal measurement obtains, described method also includes: according to different types of downstream signal Corresponding interference level, assignment configuration CSI based on different types of downstream signal measures Signal power is assumed；Or the letter that instruction UE obtains CSI measurement during corresponding high interference levels The power of road part improves predetermined value, or, CSI measurement during corresponding high interference levels is obtained Interference sections power reduce described predetermined value.

The third aspect, it is provided that a kind of subscriber equipment.Described subscriber equipment includes receptor, sends out Send device and processor, it is characterised in that: described receptor is configured to receive multiple types from base station The downstream signal of type；Described processor is configured on described polytype downstream signal survey Amount channel condition information CSI；And described transmitter be configured to described base station feedback based on The CSI that described polytype downstream signal measurement obtains.

Fourth aspect, it is provided that a kind of base station.Described base station includes receptor, transmitter and place Reason device, it is characterised in that: described transmitter is configured under the control of described processor send Polytype downstream signal is measured for CSI；And described receptor is configured to receive The CSI obtained based on described polytype downstream signal measurement of user equipment (UE) feedback.

It should be noted that, the corresponding embodiment of first aspect can also be applied to second aspect, equally, The corresponding embodiment of second aspect can also be applied to fourth aspect.

According to the specific embodiment of technology described in this application, add UE and measure CSI's Chance, improves CSI certainty of measurement, and is conducive to feeding back maximally effective CSI.

Accompanying drawing explanation

By reading retouching in detail with reference to made non-limiting example is made of the following drawings Stating, other features, purpose and advantage will become more apparent upon:

Fig. 1 shows polymerization licensed band and exempts from the schematic diagram of licensed band；

Fig. 2 shows the exemplary of the method for the measurement according to the embodiment of the present application and report CSI Flow chart；

Fig. 3 shows the schematic diagram of DRS structure；

Fig. 4 shows that extension DRS shows with a kind of example arrangement including multiple CRS port It is intended to；

Fig. 5 shows that extension DRS is to include the another kind of example arrangement of multiple CRS port Schematic diagram；

Fig. 6 shows that extension DRS is to include another example arrangement of multiple CRS port Schematic diagram；

Fig. 7 shows that extension DRS is to include another example arrangement of multiple CRS port Schematic diagram；

Fig. 8 shows that when base station sends downstream signal under different scenes, the interference profile of UE is shown It is intended to；

Fig. 9 shows a kind of illustrative diagram based on priority feedback P-CSI；

Figure 10 shows owing to there is the CSI measured based on signal with different type, during CSI feedback Situation about being likely to occur；

Figure 11 shows a kind of illustrative diagram of the CSI of feedback RI and each BP；

Figure 12 shows the another kind of illustrative diagram of the CSI of feedback RI and each BP；

Figure 13 shows another illustrative diagram of the CSI of feedback RI and each BP；

Figure 14 shows the exemplary flow of the method for the reception CSI according to the embodiment of the present application Figure；And

Figure 15 shows the equipment of the exemplary embodiment that may be configured to put into practice the application Schematic block diagram.

Detailed description of the invention

With embodiment, the application is described in further detail below in conjunction with the accompanying drawings.It is appreciated that , specific embodiment described herein is used only for explaining related invention, rather than to this Bright restriction.It also should be noted that, for the ease of describe, accompanying drawing illustrate only with About the part that invention is relevant.

It should be noted that in the case of not conflicting, the embodiment in the application and embodiment In feature can be mutually combined.Describe this below with reference to the accompanying drawings and in conjunction with the embodiments in detail Application.

In the following description, base station (BS) is that the access that communication equipment accesses Cellular Networks sets Standby, it is for distributing the communication resource to communication equipment.Base station can be following any entity: increases Strong type node B (eNB), node B, radio access unit, base station controller, base station are received Send out platform, etc..Communication equipment can be intended in via access network access service and can join Put any equipment for being communicated by access network.Such as, communication equipment can include but It is not limited to: subscriber equipment (UE), user terminal, mobile station (MS), cell phone, intelligence Can phone, computer or be configured with the multimedia system of communication function.It should be noted that, under During literary composition describes, term " communication equipment ", " subscriber equipment " and " user terminal " can exchange Use.

Although it is further noted that for illustrative purpose, hereafter in the Cellular Networks of LTE/LTE-A type Each embodiment described in network, skilled person realizes that the disclosed embodiments also may be used To apply in various other kinds of cellular networks.It will be understood by those skilled in the art that to the greatest extent Pipe measures mainly for the CSI exempting from licensed band in the following description and report is illustrated, Proposed technical scheme can also be applied in licensed band, such as may in licensed band Occur causing the long period not send because of certain reason (such as, discontinuously transmission) any The situation of signal, can apply, for this situation, the technical scheme that each embodiment of the application provides.

In order to make full use of the channel resource of the carrier wave exempting from licensed band, UE is needed to the greatest extent may be used CSI can accurately be reported.Embodiments herein provides the scheme processing CSI report.

Exempting from licensed band, LTE equipment to decide whether to take according to CCA result Channel.Therefore, LTE equipment can constantly of busy channel not determine that, and may Occur that LTE equipment does not sends any signal in a long time.This causes the base station can not periodically Send the reference signal measured for CSI, and then the CSI measurement to UE impacts. In order to ensure that CSI measures and the effectiveness of report, need to send use by chance as much as possible In the reference signal that CSI measures.The above-mentioned reference signal measured for CSI can be that community is public Reference signal CRS altogether, channel state information reference signals CSI-RS or the reference of new definition Signal structure.

Fig. 2 shows the exemplary of the method for the measurement according to the embodiment of the present application and report CSI Flow chart.As in figure 2 it is shown, the method includes:

Step 201:UE measures CSI on polytype downstream signal.

The signal that may be used for CSI measurement of base station transmission can have polytype.

The first is that base station busy channel sends downlink data signal, and in sending data time Send the reference signal measured for CSI.At this moment, on the one hand UE can receive the ginseng of base station Examine signal and carry out the channel measurement of CSI, on the other hand, suffered by UE from other equipment Interference reacted the most really UE receive data time interference, so, the survey of CSI Amount effectiveness is higher.

The second is that base station sends discovery reference signal (DRS).DRS function includes providing UE The reference measured of RRM (RRM), i.e. even if do not send data in base station In the case of, it is still desirable to send DRS according to certain density.Here, at LTE version In 12, DRS usually sends according to certain cycle and duration, and its duration can be 1～5 Individual subframe.And exempting from licensed band, because the impact of CCA, the transmission timing of DRS can Can not be periodic, and, if channel duration hurries, still appear in a period of time DRS can not be sent.In order to support that CSI measures, in one implementation, DRS can be made The reference signal measured for CSI.Or, in another implementation, at the channel occupancy of DRS The reference signal measured for CSI is sent in time.

The third is base station busy channel and only sends the reference signal being exclusively used in CSI measurement.Adopt Use this method, can send, with frequency more faster than DRS, the reference signal that CSI measures.

To above-mentioned the second and the downstream signal of the third type, if base station is not at system band All send signal on all subcarriers in width, then normally result in its transmission power ratio the first The signal power of type is low.This causes around base station the equipment beyond a smaller range may be because of For detecting interference level low and proceed-to-send signal, what namely UE was subject to sets from other Standby interference level is higher than the first situation.Therefore, based on above-mentioned the second and the 3rd The CSI of the downstream signal of type measures (the referred to as CSI measurement and the 3rd of the second type The CSI of type measures), essence is all the measurement of the situation not sending downlink data in base station, So not being the most accurately.In the description of the application subsequent embodiment, can be the second CSI measurement with the third type is merged into same type and is processed, such as, it is believed that it is excellent First level is identical；Or, it is also possible to further discriminate between both CSI and measure, such as, to them Distribute different priority.For convenience, both CSI in description herein below Measure as same type of process.It will be understood by those skilled in the art that described method is permissible Simply expand to distinguish the situation that both CSI are measured.

It practice, sometimes base station can send polytype signal after busy channel.Example Also send DRS while sending downlink data such as, base station, or, send DRS time Between also send in section and be exclusively used in the reference signal that CSI measures.At this moment, can remain according to UE Interference level classify.Such as, also send DRS's while base station being sent downlink data Situation, because base station have sent data, the interference from other equipment suffered by UE is to compare Reacted interference when UE receives data really, thus CSI at this time measure can be with The CSI of above-mentioned downstream signal based on the first type measures (the referred to as CSI of the first type Measure) turn to a type.

Alternatively or additionally, if the base station long period fails to seize channel sends data signal, Also fail to seize channel send DRS or be exclusively used in the reference signal that CSI measures, namely UE Long period does not receives the signal that base station sends, and UE is at the CSI of the pre-test of long period The channel status that cannot give the correct time on real embodiment UE, from but a kind of invalid information.This Time, UE can send CQI index 0 (OOR) and indicate invalid CQI；Or, it is also possible to Utilize the channel disturbance level that the chance report of report CSI is current, thus provide for base station scheduling A certain degree of reference.Because base station fails busy channel and sends downstream signal, near base station its His equipment is likely to be at open mode, thus the interference level that UE receives may be higher, than The situation of the signal that above-mentioned base station sends three types will be higher.

Here, in certain embodiments, the window that a CSI measures can be configured, i.e. only have In this window, base station does not the most send downlink data, does not the most send DRS and is exclusively used in survey When measuring the reference signal of CSI, UE just feeds back the instruction of pure interference level；Otherwise, UE is the most anti- Present the CSI information measured during downlink data transmission based on base station or based on DRS or base In the CSI information being exclusively used in the reference signal that CSI measures.

In one implementation, this window can be to come relative to subframe n at CSI transmission place Determine, i.e. [n-W, n-k], the number of subframes in wherein W-k+1 determines this window, k Depending on the processing delay of UE, such as, k is equal to 4.

Or, in another implementation, for CSI aperiodic, this window can also be root According to subframe m triggering the UL grant (uplink authorization) that aperiodicity CSI (A-CSI) is reported Determine, i.e. [m-X, m-x], the number of subframes in wherein X-x+1 determines this window, X depends on the processing delay of UE, and x can leave UE for more than 0 and more process time, x CSI more timely is likely fed back less than 0, or, x can also be equal to 0.

Continuing Fig. 2, step 202:UE feedback obtains based on polytype downstream signal measurement CSI.

According to analysis herein above, the essence of above-mentioned CSI based on polytype signal measurement Really property and effectiveness are different, and correspondingly the present invention proposes the method processing CSI feedback.

Four preferred embodiments of the process CSI feedback that the present invention provides are described below.

Embodiment one

In embodiment one, it is described how the DRS sent based on base station carries out CSI measurement.

On the carrier wave exempting from licensed band, base station decides whether to account for according to CCA result With channel, and base station is after busy channel a period of time, specifies this time not according to Europe More than 13ms, base station must discharge channel.So, base station may can not take letter for a long time Road, and busy channel when, also can only take a bit of time.Although sending in base station CSI measurement in the case of downlink data is the most accurately, but UE line number under base station sends Measure according to period and report CSI generally has little time under dispatching in present channel holding time Row data, and if next time base station busy channel send data be after the long period, This CSI information may be the most expired.It addition, in order to send at base station busy channel Having during downlink data and compare CSI information timely, needs obtain newer before base station sends data CSI.Base station can be by comprising the reference measured for CSI in the time period sending DRS Signal or transmission are exclusively used in the reference signal of CSI measurement to solve the problems referred to above.Above-mentioned for The reference signal that CSI measures can be CRS, CSI-RS or the reference signal structure of new definition.

DRS limits with the transmission being exclusively used in the reference signal that CSI measures can be more relaxed.Example As, if according to Europe specify, DRS and be exclusively used in CSI measure reference signal according to short control Signaling processed (SCS) processes, then base station can not be CCA and be directly transmitted these signals, Thereby may be ensured that these signals are to occur in the cycle, thus be highly suitable for CSI and measure. Or, although base station need nonetheless remain for CCA before these signals sending, but condition relative to The situation sending downlink data to be loosened.Such as, its CCA detection threshold is higher, so, Base station can send the probability of these signals and be higher than the situation sending downlink data, thus also has It is beneficial to provide the more chance measuring CSI.Even if it addition, DRS measures with being exclusively used in CSI Transmission condition and the downlink data of reference signal be the same, utilize these signals to remain able to Benefit is provided.Such as, in the case of load is relatively light, base station currently without data, then base station Can only send DRS and/or be exclusively used in the reference signal that CSI measures, it is provided that obtain timely The chance of CSI.Describe below according to some exemplary embodiments of the present invention how based on base station The DRS sent carries out the processing method of CSI measurement.

First method is the reference signal that the DRS that base station is sent measures directly as CSI.

Fig. 3 shows a kind of schematic diagram of DRS structure.As it is shown on figure 3, according to Rel-12 Definition in (issuing 12) standard, DRS includes polytype signal, i.e. master sync signal (PSS), subsynchronous signal (SSS) and CRS port 0, and base station can also configure DRS Comprise a NZP CSI-RS port.So, UE can utilize CRS port 0 and/or this Individual NZP CSI-RS port measures CSI.Specifically, can be two kinds of signals all for CSI measures；Or, only use a kind of signal therein to measure CSI；Or, it is also possible to It is that the transmission mode (TM) according to UE measures CSI.Such as, to TM 1～8, permissible It is to measure CSI based on CRS port 0；To TM 9, can be based on this NZP CSI-RS Port measures the channel strip of CSI, and measures the interference portion of CSI based on CSI port 0 Point；To TM10, it can be the channel measuring CRS based on this NZP CSI-RS port Part, and survey based on the Resource Unit (RE) that this cell power in DRS subframe is 0 Amount interference sections.Such as, the RE that this cell power is 0 in above-mentioned DRS subframe can be Refer to all RE that this cell power is 0 in DRS subframe；Or, it is also possible to it is with high level Interferometry resource in a signal deployment subframe in the subframe that DRS takies, the most multiple Collocation method with ZP CSI-RS；Or, it is preferable that the son at this ZP CSI-RS place Frame can be the subframe comprising NZP CSI-RS in the subframe that DRS takies.

Second method is that the DRS structure to Rel-12 definition is extended, thus comprises more Many reference signal ports are measured for CSI.In other words, UE comprises after being extended by DRS Multiple reference signal ports are measured for CSI.

On the one hand, in order to support that CSI based on multiple CRS ports measures, DRS can be extended Comprise multiple CRS port.In certain embodiments, can be all sons taken at DRS CRS port is all extended on frame.

In one implementation, the CRS port of extension can be directly to reuse existing CRS port 1～3 mapping structures in subframe.Fig. 4 shows that extension DRS is to include multiple CRS port A kind of example arrangement schematic diagram.It is assumed that need two CRS ports, then CRS port 0 and 1 can be sent in DRS.

Or, in another implementation, the CRS port of extension can also be existing CRS end Mouth displacement in time obtains.Fig. 5 shows that extension DRS is to include multiple CRS port Another kind of example arrangement schematic diagram.As shown in fig. 5, it is assumed that need two CRS ports, CRS port 0 then can offset to the right OFDM (OFDM) symbol obtain One new port, it is different from existing 4 CRS ports, is designated as CRS port x, and CRS port x is utilized to measure the channel of CRS port 1.This method is used to be conducive to many Individual CRS port is distributed in different OFDM symbol, thus is sending multiple CRS ports In the case of, do not increase or reduce as far as possible and add the through-put power of DRS.

Fig. 4 and Fig. 5 assumes that in all subframes that DRS takies, all extends CRS port. Or, in further embodiments, it is also possible to be the part only in DRS takies subframe Expand to comprise multiple CRS port on frame, such as, in a subframe, extend CRS the most wherein Port.The subframe of such part extension CRS port can be to join with high-level signaling is semi-static Putting, it is also possible to be fixing, such as, that subframe comprising PSS/SSS carries out CRS expansion Exhibition.

Fig. 6 shows that extension DRS is to include another example arrangement of multiple CRS port Schematic diagram.As shown in Figure 6, it is assumed that the CRS port of extension can be directly to reuse existing CRS The port 1～3 mapping structure in subframe, and only take up second subframe that DRS takies.

Fig. 7 shows that extension DRS is to include another example arrangement of multiple CRS port Schematic diagram.As shown in Figure 7, it is assumed that the CRS port of extension can also be existing CRS port Displacement in time obtains, and only takes up second subframe that DRS takies.In the figure 7, Assuming to need to support 4 CRS ports, wherein, CRS port a/b/c is by existing CRS Port displacement obtains, and is respectively used to the measurement corresponding to CRS port 1/2/3.

On the other hand, in order to support that CSI based on multiple CSI-RS ports measures, Ke Yikuo Exhibition DRS comprises multiple CSI-RS port.Here it is possible to be the CSI-RS that comprises of DRS after extension Port number is equal with the CSI-RS port number measured for CSI.Specifically, if Need two CSI-RS ports, can be the two of the mapping of the CSI-RS of DRS signal deployment On individual RE, directly support CSI-RS port 15 and 16.Or, when needs 4 or 8 During individual CSI-RS port, can be in the subframe at the CSI-RS place of DRS signal deployment Distribute 4 or 8 RE, and be respectively used to carry 4 or 8 CSI-RS ports CSI-RS.Above-mentioned multiple CSI-RS ports after extension can remain in DRS In one subframe, or, it is also possible to the above-mentioned multiple CSI-RS port distribution after extension are arrived In a part of subframe in DRS or all subframe.

Or, in order to support that CSI based on multiple CSI-RS ports measures, can be independently The multiple CSI-RS ports measured for CSI in configuration DRS.It is configured with use at DRS In the reference signal place subframe that CSI measures, not only send DRS but also send the use of described configuration In the reference signal that CSI measures.Here it is possible to be configured to what CSI measured with high-level signaling The port number of CSI-RS, the sub-frame offset taken in DRS and the RE taken.Enter one Step ground, the RE of the multiple CSI-RS ports that can limit described signal deployment can be with existing The RE of the CSI-RS port of DRS signal deployment differs；Or, it is also possible to do not limit, And leave base station for and realize processing.

Use above-mentioned second method, namely extension DRS structure, can be only to extend CRS Port, it is also possible to be an only extension CSI-RS port, it is also possible to be extend simultaneously two kinds of The reference signal that CSI measures.So, UE utilizes CRS port and/or the NZP of extension of extension CSI-RS port measures CSI.Specifically, can be that two kinds of signals are all measured for CSI； Or, only use a kind of signal therein to measure CSI；Or, it is also possible to it is according to UE Transmission mode (TM) measure CSI.Such as, to TM 1～8, can be based on extension CRS port measure CSI；To TM 9, it can be NZP CSI-RS end based on extension Mouth measures the channel strip of CSI, and CRS port based on extension measures the interference of CSI Part；To TM10, it can be the letter measuring CSI based on the NZP CSI-RS port extended Road part, and measure interference sections based on the RE that this cell power in DRS subframe is 0. Such as, the RE that this cell power is 0 in above-mentioned DRS subframe may refer to DRS subframe Interior all RE that this cell power is 0；Or, it is also possible to it is to be arranged in high-level signaling The interferometry resource in a subframe in the subframe that DRS takies, such as multiplexing ZP The collocation method of CSI-RS；Or, it is preferable that the subframe at this ZP CSI-RS place is permissible It it is the subframe comprising NZP CSI-RS in the subframe that takies of DRS.

The third method is to be semi-statically configured, with high-level signaling, the reference signal measured for CSI Position, when this reference signal place subframe is overlapping with DRS subframe, at DRS This subframe in both sent DRS also send CSI measure reference signal.To CSI-RS, When it is with when a subframe of DRS is overlapping, can directly send out in this subframe of DRS Send CSI-RS.To CRS, it can be discontinuous transmission measuring for CSI when. Specifically, can be to be configured to, with high-level signaling, the cycle of CRS, the skew that CSI measures And time span, i.e. within a cycle, from instruction offset originate send for CSI survey The time span of the CRS, CRS of amount can be transmission CRS in one or more subframe, Or, it is also possible to it is that regulation sends CRS, such as, a time slot on the shorter time period. So, when one or more subframe of CRS with DRS measured for CSI is overlapping, And when CRS includes multiple CRS port, can be directly such a or many at DRS The CRS of multiple port is sent in individual subframe.

Embodiment two

In embodiment two, describe when carrying out CSI measurement based on different types of downstream signal Time, different qualities based on these CSI feed back.

According to above description of the invention, on the carrier wave exempting from licensed band, UE report CSI may come from several different types of signal.In base station sends the time of downlink data CSI measurement is the most accurate, on the one hand, can essence in base station sends the time of downlink data Really measure the channel strip of CSI, on the other hand, the doing from other equipment suffered by UE Disturb and reacted experienced interference when UE receives data the most really.Here, because base station Send downlink data through-put power the biggest, near base station one in a big way in Other equipment all can not send signal, thus the interference that UE receives is relatively small.

Fig. 8 shows that when base station sends downstream signal under different scenes, the interference profile of UE is shown It is intended to.As shown in the 802 of Fig. 8, when base station 800 sends downlink data, around base station Other base stations A, B and C can not send signal, thus UE only receives from base station D's Interference.And to measurement when sending DRS in base station or be exclusively used in the reference signal of CSI measurement CSI, although the measurement of the channel strip of CSI is the most accurate, but, because the biography of base station Defeated power is the most relatively low, so only equipment within a smaller range does not sends around base station Signal, thus the interference level from other equipment that UE is subject to sends downlink data than base station Time bigger than normal.As shown in the 801 of Fig. 8, when base station 800 sends DRS, only around base station Other base stations A can not send signal, thus UE may receive from base station B, C and/or D Interference.So, when configuring the CSI feedback of UE, need to consider above-mentioned based on inhomogeneity The different qualities of the CSI of type signal measurement.

First method is that one CSI process (CSI Process) of configuration only feedback is based on one The CSI of the signal of type.That is, one CSI process is only fed back at base station busy channel and sends The CSI measured in the time period of downlink data, or a CSI process only feeds back based on DRS Or the CSI measured when being exclusively used in the reference signal of CSI measurement.Here, to above-mentioned configuration CSI , in this window, only there is the signal of this CSI process corresponding in the method for the window measured During type, UE just feeds back effective CSI, and otherwise UE may indicate that CSI is invalid, such as, and UE Report CQI indexes 0 (OOR).

Or, second method is to make a CSI process remain able to based on above two type Signal measure feedback CSI information.Be appreciated that two kinds of signal here be by Classify according to the interference level of UE.Here, because two kinds of signal place subframe Interference level is usually different, so the interference in the signal place subframe of both types is not It is suitable for doing average operation.At this moment, the measurement that can define the interference sections that CSI measures can only be In the subframe of the signal that type is identical averagely；Or, the interference sections that CSI measures can be defined Being based only on a subframe to calculate, be not the most averaged operation to interference；Or, it is also possible to fixed The interference sections that justice CSI measures is the weighted average of subframe based on above two type.

According to analysis above, survey based on DRS or when being exclusively used in reference signal that CSI measures It is more conservative that the CSI of amount is actually ratio.Because the when of actual transmission downlink data, generally The interference signal level that UE receives is smaller.As such, it is possible to based on DRS or specially For CSI measure reference signal time measure CSI compensate, thus be close to based on Measure, in sending the time period of downlink data, the CSI obtained.

In some implementations, described compensating operation can complete in UE side.I.e. UE adds up it Send the interference level A during downlink data in base station, and base station sends DRS or special Interference level B during the reference signal that CSI measures, UE can be according to interference water then Flat A and B compensates its signal to noise ratio measured.Such as, based on DRS or be exclusively used in CSI The signal to noise ratio that measurement during the reference signal measured obtains improves (B-A) dB, it is assumed here that A It it is all dB value with B.Using this method, base station can be direct according to the CSI of UE report For the scheduling of the downlink data after channel occupancy, and the measurement of such CSI need not be concerned about It is to be also based on DRS based on downlink data transmission or be exclusively used in the reference signal that CSI measures.

In other realize, described compensating operation can complete in base station side.Specifically, Base station can be respectively configured CSI based on downlink data transmission and measure and based on DRS or special The signal power measured in the CSI of the reference signal of CSI measurement is assumed.Or, it is also possible to straight Connect instruction UE based on DRS or be exclusively used in CSI measure reference signal measure CSI time, The power of the channel strip that measurement is obtained improves X dB；Or, equally, measurement is obtained Interference sections power reduce X dB.Here, doing in the case of the value of X depends on two kinds Disturbing level difference, different UE are usually different under different scenes by X.Base station is permissible Value by the above-mentioned X of signal deployment.

According to existing LTE standard, to channel measurement based on CRS, UE is to join based on high level The power parameter P put_AAnd shifted by delta_offsetDetermine the hypothesis of signal power when measuring CSI.That is,

TM 2 to 4 CRS ports of configuration, and the TM 3 of 4 CRS ports of configuration And the situation that order instruction RI is equal to 1, ρ_A=P_A+Δ_offset+10log₁₀(2)dB；

Otherwise, to any modulation system and the number of plies, ρ_A=P_A+Δ_offsetdB。

ρ_AIt it is the energy on each RE of PDSCH in the OFDM symbol not comprising CRS (EPRE) with the ratio of the EPRE of CRS.

So, in one implementation, compensation method is two Δs of configuration_offset, one for based on The CSI of downlink data transmission measures, and is designated as Δ_offset,1；Another is for based on DRS or specially For the CSI measurement of the reference signal that CSI measures, it is designated as Δ_offset,2。Δ_offset,2Compare Δ_offset,1High X dB。

Or, in another implementation, compensation method is directly to indicate X, i.e. to based under The CSI of row data transmission measures, based on P_AAnd Δ_offsetDetermine signal power when measuring CSI It is assumed that be designated as ρ_A=f (P_A,Δ_offset)；And to based on DRS or be exclusively used in CSI measure ginseng The CSI examining signal measures, and determines being assumed to be of signal power when measuring CSI ρ_A=f (P_A,Δ_offset)+X。

According to existing LTE standard, to channel measurement based on CSI-RS, UE is based on high level The power parameter P of configuration_CDetermine the hypothesis of signal power when measuring CSI.

So, in one implementation, compensation method is two P of configuration_C, one for based under The CSI of row data transmission measures, and is designated as P_C1；Another is used for based on DRS or is exclusively used in The CSI of the reference signal that CSI measures measures, and is designated as P_C2。P_C2Compare P_C1High X dB.

Or, in another implementation, compensation method is directly to indicate X, i.e. to based under The CSI of row data transmission measures, based on P_CDetermine the hypothesis of signal power when measuring CSI； And CSI based on DRS or the reference signal being exclusively used in CSI measurement is measured, based on P_C+X Determine the hypothesis of signal power when measuring CSI.

Embodiment three

In embodiment three, describe when CSI feedback resource contention occurs, how to report CSI.

The identical resource multiple CSI of feedback are taken in some cases, it can be possible to there will be.Such as, Such scene can be to be configured with in identical Physical Uplink Control Channel PUCCH resource Periodicity CSI (P-CSI) of multiple carrier components (CC), and/or multiple CSI process P-CSI, and/or the P-CSI of different CSI subframe collection.In existing LTE system, at PUCCH On CSI feedback, when occurring that PUCCH resource is conflicted, its priority is CSI from high to low Report Type > CSI process ID > community ID > CSI subframe collection index.Here, CSI report class Type is for distinguishing the prior CSI such as RI and general such as pre-coding matrix instruction/channel matter The CSI of amount instruction (PMI/CQI) information.

According to description herein above, on the carrier wave exempting from licensed band, UE report CSI may come from several different types of signal, and its effectiveness is different.Wherein, in base station It is the most accurate for sending the CSI measurement in the time of downlink data, so effectiveness is the highest, this It is because the interference from other equipment suffered by UE to have reacted UE the most really and connect Experienced interference when receiving data.Send DRS in base station or be exclusively used in the reference letter that CSI measures Number time measure CSI poor accuracy some, correspondingly its effectiveness is the most lower, this be because of For, although the measurement of channel strip is accurate, but the through-put power of base station is the most relatively low, So only equipment within a smaller range does not send signal around base station, thus UE is subject to The interference level from other equipment arrived is bigger than normal than during the transmission downlink data of base station.Finally, because of Fail to seize, for the base station long period, the pure interference level instruction that channel causes UE to report only to carry For the reference of base station scheduling, its effectiveness is minimum.

So, in one implementation, when occurring that needing to take identical resource feedback exempts from license frequency During multiple CSI information of section, the effectiveness corresponding above-mentioned polytype CSI can measured CSI report, i.e. CSI effectiveness is processed as limit priority > CSI report type > CSI mistake Journey ID > community ID > CSI subframe collection index.So, in base station sends the time of downlink data The priority measured of CSI the highest, next to that send DRS or be exclusively used in CSI in base station The CSI measured during the reference signal measured, minimum is that the pure interference level that UE reports indicates. Wherein, the instruction of pure interference level can be to think the definition of inapplicable CSI report type；Or, Can also be fixing to think its corresponding a kind of CSI report type, such as, be equivalent to PMI/CQI. In this manner it is ensured that the CSI of UE report must be the CSI that effectiveness is the highest.

Or, in another implementation, the priority of above-mentioned effectiveness can be reported less than CSI Accuse type, but higher than other parameters, i.e. CSI report type > CSI effectiveness > CSI process ID > Community ID > CSI subframe collection indexes.Use this method, it is ensured that the prior CSI such as RI The priority of information is higher than general PMI/CQI information.Wherein, the instruction of pure interference level can be Think the definition of inapplicable CSI report type；Or, it is also possible to it is fixing to think its correspondence one Plant CSI report type, such as, be equivalent to PMI/CQI.

Further, feed back and exempt from the carrier wave of licensed band when needing to take identical resource During the CSI of CSI and licensed band, in addition it is also necessary to the CSI of definition licensed band and above-mentioned exempt from license The priority orders of polytype CSI of frequency range.

In one implementation, can be differentiation frequency range type determining priority when, i.e. be permitted Can frequency range and exempt from licensed band.Frequency range type can be limit priority；Or, frequency range type Priority higher than CSI effectiveness, but be below CSI report type；Or, frequency range type Priority higher than CSI report type, but be below CSI effectiveness；Or, frequency range type Priority less than CSI report type and CSI effectiveness, but higher than other parameters；Or, The priority of frequency range type is higher than community ID, but is below CSI process ID；Or, frequency range The priority of type indexes higher than CSI subframe collection, but is below community ID.

Or, in another implementation, it is also possible to be the effectiveness of the CSI of regulation licensed band, Such that it is able to sort according to effectiveness together with the CSI exempting from licensed band.Here, because being permitted Can the reference signal measured for CSI of frequency range can send in the cycle, thus total energy report and Time CSI, it is possible to the effectiveness of the CSI of definition licensed band is higher than exempting from licensed band CSI.Or, it is contemplated that exempt from the Competition Characteristics of the channel occupancy of licensed band, based on downlink data The chance of the CSI that transmission and/or DRS obtain with the reference signal measurement being exclusively used in CSI measurement It is limited, so, the effectiveness of the CSI that can define licensed band is being exempted from perhaps less than above-mentioned Can frequency range based on downlink data transmission and/or DRS and be exclusively used in the reference signal that CSI measures Measure the CSI obtained；Or, it is also possible to the effectiveness of the CSI of definition licensed band is less than upper State and exempting from the CSI obtained based on downlink data transmission measurement of licensed band, but still above The CSI obtained with the reference signal measurement being exclusively used in CSI measurement based on DRS.

To P-CSI, can be multiple licensed band communities and the P-CSI exempting from licensed band community PUCCH resource be arranged in identical subframe or the identical subframe of part, then adopt Divide to determine UE which CSI of actual feedback in a subframe by priority above. Such as, the CSI priority CSI higher than licensed band of licensed band is exempted from configuration, configures simultaneously UE reports based on downlink data, DRS or the CSI being exclusively used in the reference signal that CSI measures Window be a less value, i.e. in UE only a bit of time after the busy channel of base station Could report based on downlink data, DRS or the CSI being exclusively used in the reference signal that CSI measures. UE preferentially reports such CSI, because its priority is higher than the CSI of licensed band；And at it He feeds back the timing position of P-CSI, exempts from licensed band and can only feed back pure interference instruction, according to upper State priority, the P-CSI of UE feedback licensed band.So, it is achieved that at a PUCCH In resource, feed back the different types of CSI of different frequency ranges according to importance, improve resource profit By rate.

Fig. 9 shows a kind of illustrative diagram based on priority feedback P-CSI.Such as Fig. 9 Shown in, without loss of generality, it is assumed that the P-CSI in a sub-frame of uplink n is fed back, only position Downstream signal in subframe n-4 and n-5 could be used for measuring CSI, i.e. window size is 2.UE The CSI priority of measurement based on DRS transmission 901 is higher than the CSI of licensed band, so UE exempts from the CSI of licensed band in PUCCH resource 911 feedback；Similarly, UE is descending CSI is measured in data transmission 902 and DRS 903, and in PUCCH resource 914 and 915 Feedback exempts from the CSI of licensed band；And in other PUCCH resource, because exempting from licensed band On can only feed back pure interference instruction, its priority is less than the CSI of licensed band, so UE exists The CSI of PUCCH resource 910,912,913,916 and 917 feedback licensed band.So, Exempting from licensed band have up-to-date preferable CSI information as long as achieving, license frequency is exempted from UE just report The CSI of section, and the CSI of other times report licensed band.

Similarly, the method for above-mentioned process P-CSI can expand to aperiodicity CSI (A-CSI). High-level signaling, can be multiple licensed band communities with to exempt from licensed band little when configuring A-CSI District and/or CSI process are divided into same group, and in this is organized, regulation has only to feed back one CSI.UE still can utilize priority policy discussed above to select to need the CSI of feedback Information.

To above-mentioned feedback P-CSI and the method for A-CSI, the final CSI information selected depends on Exempting from the effectiveness of the CSI measured in licensed band, i.e. depending on the base station exempting from licensed band is No have sent downlink data.But, base station busy channel sends the event of downlink data, or It is that the blind Detecting by UE obtains, or by descending by one in licensed band Control what instruction (DCI) indicated, such as, the DCI format in public search space CSS. Such method is not the most the most reliable, and whether this may cause base station and UE to currently depositing Different understanding is had at the CSI measured based on downlink data transmission.In order to avoid UE reports CSI Obscure, in certain embodiments, can carry further in CSI report its report CSI Beacon information.Such as, UE can report this corresponding for CSI fed back community ID, CSI Process ID and CSI effectiveness type etc..

Embodiment four

In embodiment four, it is described how according to the change of the signal type measured for CSI Adjust CSI feedback.

According to existing LTE standard, PUCCH can only feed back most 11 bits every time CSI information, so, can not once feed back each subband on full bandwidth to subband CSI, UE CSI information, but can only be multiple portions of bandwidth (BP) whole bandwidth partition, thus Once can only feed back the subband PMI/CQI of a BP.It addition, the period ratio of UE feedback RI Longer, i.e. within a cycle of feedback RI, the PMI/CQI of Feedback BP repeatedly can be there is Chance.

According to description herein above, on the carrier wave exempting from licensed band, UE report CSI may come from several different types of signal.Wherein, base station send downlink data time Interior CSI measurement is the most accurate；Send DRS in base station or be exclusively used in what CSI measured During reference signal measure CSI poor accuracy some；Because the base station long period fails to seize The effectiveness that the pure interference level that channel causes UE to report indicates is minimum.Owing to base station is robbed Accounting for the randomness of channel, the now that goes out of the signal of above-mentioned several possible types is uncertain. Specifically, after having reported RI based on a type of signal, all not reported Before the PMI/CQI of BP, may have occurred the signal of a kind of new type, correspondingly, Need definition UE in this case to process CSI to measure and the method for feedback.

Figure 10 shows owing to there is the CSI measured based on signal with different type, during CSI feedback Situation about being likely to occur.As shown in Figure 10, it is assumed that system bandwidth is divided into 5 BP.UE based on The subband CSI (1012,1013 of DRS (1001) measurement report RI (1011) and 3 BP With 1014) after, requiring from processing delay merely, downlink data transmission 1002 is the most permissible The reference measured as CSI, for processing the CSI report of two BP (1015,1016), But, the characteristic of DRS 1001 and downlink data transmission 1002 is different.

First method is, what the newest signal type that can be used for measuring CSI is, always It is the signal type according to the last time report RI, based on same type of signal, completes whole The PMI/CQI report of all BP in individual bandwidth.But new RI reports to be needed according to new letter Number type is measured.

Figure 11 shows the one of the CSI of the feedback RI according to first method and each BP Illustrative diagram.As shown in figure 11, the RI 1111 of feedback is obtained according to DRS 1101, then Follow-up 5 BP (1112～1116) are all based on DRS measurement and obtain, and are all based in figure DRS 1101；It follows that obtain the RI 1117 of feedback according to downlink data transmission 1102, then Follow-up 5 BP (1118～1122) are all based on downlink data transmission measurement and obtain, in figure It is all based on downlink data transmission 1102.

Second method is, because new can be used for measuring the appearance of the signal type of CSI, base PMI/CQI and RI in the follow-up BP of new signal categorical measures.Here, new in report Before RI, although the PMI/CQI of BP has been based on new signal type and measures, but still Assume the RI RI equal to the last time report.

Figure 12 shows the one of the CSI of the feedback RI according to second method and each BP Illustrative diagram.As shown in figure 12, RI 1211 He of feedback is obtained according to DRS 1201 After the subband CSI (1212～1214) of 3 BP, downlink data transmission 1202 can be made The reference measured for CSI.At this moment, UE carrys out work still according to the RI of feedback in 1211, But it is the subband CSI calculating two BP (1215,1216) based on downlink data transmission 1202. It follows that UE can obtain RI 1217 and the son of a BP based on downlink data transmission 1202 Band CSI (1218).Then, to follow-up 4 BP (1219～1222), use according to descending The RI of data transmission 1202 calculating, but calculate subband CSI based on DRS 1203.

The third method is, when the new priority that can be used for measuring the signal type of CSI is higher than During previous signal type, PMI/CQI based on the follow-up BP of new signal categorical measures and RI.Here, before reporting new RI, although the PMI/CQI of BP has been based on new signal Type is measured, but it is still assumed that RI is equal to the last RI reported.If new can It is less than previous signal type for measuring the priority of the signal type of CSI, the most still limits Make previous signal type to feed back CSI.

Figure 13 shows the one of the CSI of the feedback RI according to the third method and each BP Illustrative diagram.As shown in figure 13, RI 1311 He of feedback is obtained according to DRS 1301 After the subband CSI (1312～1314) of 3 BP, downlink data transmission 1302 can be made The reference measured for CSI.At this moment, because CSI's based on downlink data transmission 1302 is excellent First level is higher than CSI based on DRS 1301, the place to two BP (1315,1316) of feedback Reason method is identical with above-mentioned second method, namely UE is still according to feedback in 1311 RI carrys out work, but calculates two BP (1215,1216) based on downlink data transmission 1302 Subband CSI, it follows that UE can obtain RI 1317 based on downlink data transmission 1302 Subband CSI (1318) with a BP.Then, to feeding back follow-up 4 BP (1219～1222), Because CSI priority based on DRS 1303 is less than downlink transfer 1302, so at the third In method, it is still based on downlink data transmission 1302 to calculate subband CSI.

4th kind of method is, when the new priority that can be used for measuring the signal type of CSI is higher than During previous signal type, from the beginning of the PUCCH resource meeting processing delay, first report Accuse RI based on new signal categorical measures, report the PMI/CQI of each BP the most successively.Adopt Using this method, the time of UE report RI is random, so needing on PUCCH anti- During feedback P-CSI, indicate the CSI type of UE current report further, be i.e. the relevant letter of RI Breath, or the PMI/CQI of BP.

Figure 14 illustrates the exemplary process diagram of the method for the reception CSI according to the embodiment of the present application. As shown in figure 14, the method includes:

Step 1401: base station sends polytype downstream signal and measures CSI for CSI.

The signal that may be used for CSI measurement of base station transmission can have polytype, including following At least one: the reference signal measured for CSI sent in sending the time of downlink data； DRS；And it is exclusively used in the reference signal that CSI measures.Specific descriptions see above, the most no longer Repeat.

Step 1402: base station receive user equipment (UE) feedback based on polytype descending letter Number CSI that measurement obtains.

In certain embodiments, measuring based on polytype downstream signal of UE feedback is received The CSI obtained, including: receive during a CSI and be based only upon a type of descending letter Number CSI that measurement obtains；Or receive during a CSI based on polytype descending The CSI that signal measurement obtains.

Obtain based on polytype downstream signal measurement when receiving during a CSI During CSI, base station can carry out following operation: corresponding to different types of downstream signal Interference level, the signal power that assignment configuration CSI based on different types of downstream signal measures Assume；Or the channel strip that instruction UE obtains CSI measurement during corresponding high interference levels Power improves predetermined value (such as X dB), or, CSI during corresponding high interference levels is measured The power of the interference sections obtained reduces this predetermined value (X dB).

Figure 15 is shown suitable for putting into practice the entity 1500 of many exemplary embodiments of the application Simplified block diagram.Entity 1500 can be configured to network equipment, such as base station, this entity 1500 can also be configured to user side equipment, such as user terminal.

As shown in figure 15, entity 1500 includes processor 1501, is coupled to processor 1501 Memorizer 1502, and be coupled to processor 1501 be suitable for radio frequency (RF) transmitter With receptor 1504.Memorizer 1502 stores program 1503.Transmitter/receiver 1504 is fitted Together in two-way wireless communication.Note, transmitter/receiver 1504 have at least one antenna with Facilitating communications, base station or UE are likely to be of multiple antenna in practice.Entity 1500 can be through It is coupled to one or more external network or system, such as the Internet by data path.

Program 1503 can include programmed instruction, when these programmed instruction are by the processor associated During 1501 execution, it makes entity 1500 operate according to each exemplary embodiment of the application.

Embodiments herein can be by the executable calculating of processor 1501 of entity 1500 Machine software realizes, or is realized by hardware, or is come by the combination of software with hardware Realize.

Memorizer 1502 can be suitable for the storage of any suitable type of local technical environment Device, and any suitable data storage technology can be used to realize, such as based on quasiconductor Storage device and system, magnetic storage apparatus and system, light storage device and system, fixing Memorizer and removable memory, these are only used as nonrestrictive example.Although at entity Merely illustrate a memorizer in 1500, can exist multiple the most only in entity 1500 Vertical memory element.Processor 1501 can be suitable for any suitable class of local technical environment The processor of type, and can include following in one or more: general purpose computer, special Computer, microprocessor, digital signal processor (DSP) and based on polycaryon processor framework Processor, these are only used as nonrestrictive example.

When entity 1500 is configured to user side equipment, namely when entity 1500 is subscriber equipment, In certain embodiments, the receptor in transmitter/receiver 1504 is configured to connect from base station Receive polytype downstream signal.Processor 1501 is configured at this polytype descending letter Measure channel state information CSI on number.Transmitter in transmitter/receiver 1504 is configured to The CSI obtained based on this polytype downstream signal measurement to base station feedback.

When entity 1500 is configured to network equipment, namely when entity 1500 is base station, In some embodiments, the transmitter in transmitter/receiver 1504 is configured at processor Control the polytype downstream signal of lower transmission to measure for CSI.Transmitter/receiver 1504 In receptor be configured to receive user equipment (UE) feedback based on described polytype under The CSI that row signal measurement obtains.

Should be appreciated that each unit being included in entity 1500 is arranged to put into practice disclosed herein Exemplary embodiment.Therefore, the operation and the feature that describe above in conjunction with Fig. 3-14 are also applied for Entity 1500 and unit therein, omit it and describe in detail at this.

As on the other hand, present invention also provides a kind of computer-readable recording medium, this meter Calculation machine readable storage medium storing program for executing can be the meter in above-described embodiment included in base station or communication equipment Calculation machine readable storage medium storing program for executing；Can also be individualism, the computer being unkitted in the equipment of allocating into can Read storage medium.Computer-readable recording medium storage has one or more than one program, institute Program of stating by one or more than one processor for performing to be described in the Cellular Networks of the application Cut-in method.

Above description is only the preferred embodiment of the application and saying institute's application technology principle Bright.It will be appreciated by those skilled in the art that invention scope involved in the application, do not limit In the technical scheme of the particular combination of above-mentioned technical characteristic, also should contain simultaneously without departing from In the case of described inventive concept, above-mentioned technical characteristic or its equivalent feature carry out combination in any And other technical scheme formed.Such as features described above and (but not limited to) disclosed herein The technical characteristic with similar functions is replaced mutually and the technical scheme that formed.

Claims (24)

1. measure and the method for reporting channel status information CSI for one kind, it is characterised in that described Method includes:

User equipment (UE) measures CSI on polytype downstream signal；And

Described UE feeds back the CSI obtained based on described polytype downstream signal measurement.

Method the most according to claim 1, it is characterised in that based on following at least one The downstream signal measurement CSI of type:

The reference signal measured for CSI sent in the time that base station sends downlink data；

Discovery reference signal DRS that base station sends；And

What base station sent is exclusively used in the reference signal that CSI measures.

3. according to the arbitrary described method of claim 1-2, it is characterised in that described method is also Including:

If UE do not receive within a predetermined period of time base station send signal, the most described UE to Instruction CSI is invalid in described base station, or, described UE indicates current channel to described base station Interference level.

Method the most according to claim 3, it is characterised in that described UE is to described base The current channel disturbance level of instruction of standing includes:

Only when not receiving the signal that base station sends in the window that the CSI configured in base station measures Time, described UE just indicates to the pure interference level of described base station feedback.

Method the most according to claim 2, it is characterised in that send based on base station DRS measures CSI and includes following arbitrary:

The reference signal directly DRS measured as CSI；

The multiple reference signal ports comprised after being extended by DRS are used for CSI and measure；And

Carry out based on the reference signal for CSI measurement configured in DRS via high-level signaling CSI measures.

Method the most according to claim 5, it is characterised in that described by DRS extension After multiple reference signal ports of comprising measure for CSI, including following at least one:

Multiple CRS ends that expanding packet in all subframes of DRS or in part subframe is contained Mouth is measured for CSI；And

By in all subframes of DRS or multiple CSI-RS ends that in part subframe, expanding packet contains Mouth is measured for CSI.

Method the most according to claim 5, it is characterised in that described high-level signaling configures The cycle of cell common reference signal CRS, skew and the time span measured for CSI.

8. according to the arbitrary described method of claim 1-7, it is characterised in that described UE is anti- The CSI that feedback obtains based on described polytype downstream signal measurement, including:

When needing to take identical resource and feeding back the multiple CSI exempting from licensed band, according in advance Fixed priority feedback CSI, wherein said predetermined priority includes following arbitrary:

The effectiveness of the CSI obtained based on described polytype downstream signal measurement has the highest Priority；And

CSI report type has limit priority, surveys based on described polytype downstream signal The effectiveness of the CSI measured has the priority being only below CSI report type.

9. according to the arbitrary described method of claim 1-8, it is characterised in that described UE is anti- The CSI that feedback obtains based on described polytype downstream signal measurement, including:

Feed back exempt from the CSI of licensed band and licensed band when needing to take identical resource During CSI, determine priority according to frequency range type；Or, by the CSI of licensed band with exempt from perhaps Can the CSI of frequency range sort according to effectiveness together, the CSI of wherein said licensed band has Predetermined effectiveness.

Method the most according to claim 9, it is characterised in that described licensed band The predetermined effectiveness of CSI includes following arbitrary:

The effectiveness of the CSI of licensed band higher than exempt from licensed band based on polytype descending The CSI of signal measurement；

The effectiveness of the CSI of licensed band less than exempt from licensed band based on polytype descending The CSI that signal measurement obtains；And

The effectiveness of the CSI of licensed band is less than exempting from surveying based on downlink data transmission of licensed band The CSI measured, but be above based on DRS with based on being exclusively used in the reference signal that CSI measures Measure the CSI obtained.

11.-10 arbitrary described methods according to Claim 8, it is characterised in that described UE The CSI that feedback obtains based on described polytype downstream signal measurement, also includes: described UE The identification information of CSI that report is fed back, described identification information include following at least one: right Cell ID, CSI process identifier and the CSI effectiveness type answered.

12. according to the arbitrary described method of claim 1-11, it is characterised in that described UE The CSI that feedback obtains based on described polytype downstream signal measurement, including:

During a CSI, a feedback obtains based on a type of downstream signal measurement CSI。

13. according to the arbitrary described method of claim 1-11, it is characterised in that described UE The CSI that feedback obtains based on described polytype downstream signal measurement, including:

Can feed back during a CSI and measure based on described polytype downstream signal The CSI arrived.

14. methods according to claim 13, it is characterised in that when at a CSI During when feeding back the CSI obtained based on polytype downstream signal measurement, according to following One mode process CSI measure interference sections:

Average operation is carried out in the subframe measuring only identical in type signal of interference sections；

The measurement to interference sections is not averaged operation；And

Based on the interference level corresponding to different types of downstream signal, the measurement of interference sections is entered Row weighted average.

15. methods according to claim 13, it is characterised in that when at a CSI During when feeding back the CSI obtained based on polytype downstream signal measurement, according to inhomogeneity Interference level corresponding to the downstream signal of type, measures based on different types of downstream signal To CSI compensate operation.

16. methods according to claim 15, it is characterised in that described compensating operation bag Include following arbitrary:

Described UE adds up its interference level A, Yi Ji during base station sends downlink data Base station sends DRS or is exclusively used in the interference level B during the reference signal that CSI measures, root The signal to noise ratio that its CSI measurement obtains is compensated according to interference level A and B；And

The channel strip that instruction according to base station obtains CSI measurement during corresponding high interference levels Power improves predetermined value, or, the interference portion that CSI measurement during corresponding high interference levels is obtained The power divided reduces described predetermined value.

17. according to the arbitrary described method of claim 1-16, it is characterised in that described UE The CSI that feedback obtains based on described polytype downstream signal measurement, including:

Prelist according to the subband of following either type feedback order instruction RI and each portions of bandwidth BP Code matrix instruction/channel quality instruction PMI/CQI:

The signal type being based on according to the last time report RI, based on same type of letter Number, feed back the PMI/CQI of all BP in whole bandwidth；

Assume the RI RI equal to the last time report, based on the last base station busy channel Downstream signal feeds back the PMI/CQI of each BP；

Assume the RI RI equal to the last time report, when new can be used for measuring the signal of CSI When the priority of type is higher than previous signal type, based on the last base station busy channel Downstream signal feed back the PMI/CQI of each BP；And

When new can be used for the priority measuring the signal type of CSI higher than previous class signal During type, from the beginning of the Physical Uplink Control Channel PUCCH resource meeting processing delay, feedback The PMI/CQI of RI based on new signal categorical measures and each BP.

The method of 18. 1 kinds of receiving channel state information CSI, it is characterised in that described method Including:

Base station sends polytype downstream signal and measures for CSI；And

Receive obtaining based on described polytype downstream signal measurement of user equipment (UE) feedback CSI.

19. methods according to claim 18, it is characterised in that described polytype Downstream signal include following at least one:

The reference signal measured for CSI sent in sending the time of downlink data；

Find reference signal DRS；And

It is exclusively used in the reference signal that CSI measures.

20. methods according to claim 19, it is characterised in that send DRS with Include following arbitrary in CSI measurement:

Directly DRS is used as the reference signal that CSI measures；

Extension DRS measures for CSI to comprise multiple reference signal port；And

In DRS, the reference signal that CSI measures it is configured to via high-level signaling.

21. according to the arbitrary described method of claim 18-20, it is characterised in that receive UE The CSI obtained based on described polytype downstream signal measurement of feedback, including:

Receive during a CSI and be based only upon what a type of downstream signal measurement obtained CSI；Or

Receive during a CSI and obtain based on described polytype downstream signal measurement CSI。

22. methods according to claim 21, it is characterised in that when at a CSI During when receiving the CSI obtained based on polytype downstream signal measurement, described method is also Including:

According to the interference level corresponding to different types of downstream signal, assignment configuration is based on difference The signal power that the CSI of the downstream signal of type measures is assumed；Or

The power of the channel strip that instruction UE obtains CSI measurement during corresponding high interference levels carries High predetermined value, or, the merit of the interference sections that CSI measurement during corresponding high interference levels is obtained Rate reduces described predetermined value.

23. 1 kinds of subscriber equipmenies, described subscriber equipment includes receptor, transmitter and processor, It is characterized in that:

Described receptor is configured to receive polytype downstream signal from base station；

Described processor is configured on described polytype downstream signal measure channel status Information CSI；And

Described transmitter is configured to described base station feedback based on described polytype descending letter Number CSI that measurement obtains.

24. 1 kinds of base stations, described base station includes receptor, transmitter and processor, its feature It is:

Described transmitter is configured to send under the control of described processor polytype descending Signal is measured for CSI；And

Described receptor be configured to receive user equipment (UE) feedback based on described polytype The CSI that obtains of downstream signal measurement.