CN102624494A - Channel status indicator measuring method and system - Google Patents
Channel status indicator measuring method and system Download PDFInfo
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- CN102624494A CN102624494A CN2011100296223A CN201110029622A CN102624494A CN 102624494 A CN102624494 A CN 102624494A CN 2011100296223 A CN2011100296223 A CN 2011100296223A CN 201110029622 A CN201110029622 A CN 201110029622A CN 102624494 A CN102624494 A CN 102624494A
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Abstract
The invention discloses a channel status indicator (CSI) measuring method which comprises the steps of: an eNB sends a CSI measuring indication to a UE before an SCell is activated; and the UE carries out a CSI measurement according to the CSI measuring indication. Correspondingly, the invention further provides a CSI measuring system which can ensure that the UE reports an accurate CSI measurement result to the eNB after the SCell is successfully activated so that the SCell can be accurately scheduled after being successfully activated, which is conducive to the improvement of utilization rate of wireless resources and cell throughput, and a more significant scheduling gain especially for a situation of a larger number of activated Scells or more frequent activation or deactivation operations.
Description
Technical field
The present invention relates to the channel indication technology of the communications field, relate in particular to a kind of channel status indication measurement method and system.
Background technology
Third generation partnership project (3GPP; Third Generation Partnership Projects) Long Term Evolution (LTE; Long Term Evolution) universal land radio access web of evolution (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) is made up of base station (eNB) in the system.The downlink multi-access technology of LTE system inserts (OFDMA for OFDM; Orthogonal FrequencyDivision Multiple Access); The uplink multi-address technology inserts (SC-FDMA, Single Carrier Frequency Division Multiple Access) for single-carrier frequency division multiple access.ENB and subscriber equipment (UE; UserEquipment) Radio interface protocols between is by physical layer (PHY; Physical layer), media access control layer (MAC, Media Access Control), wireless chain control layer (RLC, Radio Link control), packet data convergence protocol (PDCP; Packet Data Convergence Protocol), radio resource control layer (RRC, Radio Resource Control) is formed.Descending (DL; Downlink) physical channel comprises Physical Downlink Control Channel (PDCCH; Physical Downlink Control Channel), Physical Downlink Shared Channel (PDSCH; Physical Downlink Share Channel), physical mixed automatic re-transmission indicating channel (PHICH, Physical Hybrid ARQ Indicator Channel), Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicator Channel), Physical Broadcast Channel (PB CH; Physical Broadcast Channel), Physical Multicast Channel (PMCH, Physical MulticastChannel).Up (UL; Uplink) physical channel comprises Physical Random Access Channel (PRACH; PhysicalRandom Access Channel), Physical Uplink Control Channel (PUCCH; Physical Uplink ControlChannel), Physical Uplink Shared Channel (PUS CH, Physical Uplink Share Channel).The radio frames duration of LTE system is 10 milliseconds (ms), and (Subframe) forms by 10 sub-frame, and each subframe duration is 1ms, and 1 sub-frame is 1 Transmission Time Interval (TTI, Transmission Time Interval).
In the LTE system, descending, up maximum transmission bandwidth is 20MHz.Advanced long-term evolution system (LTE-A; Long-Term Evolution advanced) system version 10 (Rel-10) carrier aggregation (CA; Carrier Aggregation) descending and up respectively with maximum 5 component carrier (CC; ComponentCarrier) polymerization is got up, all to support maximum 100MHz transmission bandwidth descending and up.UE need dispose 1 downlink main carrier to carry (DL PCC; Downlink Primary CC) and 1 up main carrier (UL PCC; Uplink Primary CC); Can dispose 0～4 descending auxilliary carrier wave (DL SCC, Downlink SecondaryCC) and/or 0～4 upstream auxiliary carriers (UL SCC, Uplink Secondary CC).Wherein, DL PCC and UL PCC form the main Serving cell (PCell) of UE; PCell provide safety and Non-Access Stratum mobility information (security and NAS mobility Info), synchronously, functions such as access, transmitting system information, paging; UE inserts at random and can only carry out through PCell, and UL PCC disposes to send and mixes automatic repeat requests (HARQ, Hybrid Automatic Repeat Request) affirmation (ACK)/non-affirmation (NACK), dispatch request (SR; Scheduling Request), the PUCCH resource of channel quality indication signalings such as (CQI, Channel QualityIndicator).The DL SCC UL SCC related with it forms time Serving cell (SCell), and SCell is as the Radio Resource that increases, and for UE provides higher bandwidth and data throughout, SCell also possibly not comprise UL SCC.UL PCC and DL PCC are through the indicated associating information of system information block 2 (SIB_2, System Information Block 2), and UL SCC and DL SCC are through SIB2 or dedicated signaling such as the indicated associating information of RRC signaling.Whenever, the UE that is in RRC connection (RRC_CONNECTED) state must maintain the configuration of a PCell.
LTE-A CA supports cross scheduling (Cross Scheduling), and according to the RRC configuration, a SCell can receive descending distribution (DLAssignment) and/or the uplink authorization (UL Grant) that PDCCH is sent on PCell or other SCell.Wherein, increase cell index field (CIF, Cell Index Field) realizes cross scheduling in the signaling through transmitting at PDCCH, and here, the CIF of the last transmission of PDCCH and UE are corresponding one by one through the pre-configured cell index (Cell Index) of RRC.Discontinuous reception (DRX at LTE-A CA; Discontinuous Reception) in the scheme; 3GPP has adopted the consistent or common DRX (Common DRX) of component carrier, or has been called the specific DRX of UE as basic scheme; Specific as follows: as to be all PCell and the identical DRX parameter of SCell use of UE configuration; The SCell of all activated state follows identical activity time (active time) and DRX circulation with PCell; From the angle of further UE power saving and CC management, eNB can pass through the SCell of media access control layer control unit (MAC CE, Medium Access Control Control Element) activation (activation/deactivation) UE; UE does not descendingly monitor PDCCH at the SCell of deactivation status, does not receive PDSCH, does not carry out the relevant measurement of channel quality indication (CQI), non-receiving system information, support the relevant RRM (RRM, Radio ResourceManagement) of mobility to measure; And; For with the SCell of deactivation status through the up detection reference signal (SRS that stops of the related SCell of SIB_2; Sounding Reference Signal) transmission/channel quality indication (CQI, Channel Quality Indicator) transmission/pre-coding matrix indication (PMI, Precoding MatrixIndicator) transmission/classification indication (RI; Rank Indicator) transmission/PUSCH sends etc.; Wherein, CQI/PMI/RI is referred to as channel status indication (CSI, Channel Status Indicator).
In present DRX scheme, UE needs just can come into force through reception/decoding/demultiplexing and the time of carrying out the activation operation after receiving the MAC CE of activation SCell.As shown in Figure 1; UE receives MAC CE at subframe n (subframe n), could accomplish the activation of SCell in the time of need waiting until subframe n+x (subframen+x), and the time interval from subframe n to subframe n+x is defined as activationary time (Activation time); The x value defined is 8ms in existing 3GPP standard; I.e. 8 sub-frame, UE only could begin CSI and measure after SCell activates successfully, according to the difference of UE ability; UE generally needs just can obtain CSI measurement result comparatively accurately about 1～3ms, and UE obtains accurately the CSI measurement result to reporting this CSI also need wait for a reference time n-n
CQI_ref, for FDD (FDD, Frequency Division Duplexing) technology, this reference time n-n
CQI_refBe defined as 4ms, concrete implementation procedure is as shown in Figure 2, and is visible, successfully can report the CSI measurement result of this SCell to need the time about 4～7ms to UE from the SCell activation.So, for the situation that adopts periodic report CSI, if pre-configured CSI reports opportunity on UE; Owing to successfully can report the CSI measurement result of this SCell to need the time about 4～7ms, possibly when reaching CSI and report opportunity, also not obtain CSI measurement result accurately to UE from the SCell activation; This just makes UE be reported to the CSI measurement result of eNB inaccurate, thereby causes eNB not dispatch the SCell of new activation exactly according to the CSI that UE reports, if this moment, the new SCell that activates had a plurality of; All can not be dispatched accurately before the 4～7ms of these SCell after activation, at this moment, according to prior art; If eNB adopts comparatively conservative resource allocation such as Modulation and Coding Scheme (MCS; Modulation and Coding Scheme) and according to transmission block (TB, Transport Block) size dispatch, just can reduce data rate and the throughput of UE; Reduce dispatching efficiency, wireless resource utility efficiency also can be on the low side; If eNB adopts higher MCS or bigger TB size to dispatch, can cause the probability of bust this to increase, thereby increase the probability that bust this needs HARQ to retransmit; If eNB sends activation MAC CE to UE in advance, then UE need begin to monitor PDCCH/ in advance and regulates that base band/radio frequency and beginning SRS/CQI/PMI/RI report etc. to the SCell that will activate, and is unfavorable for the UE power saving.And the new SCell number that activates is many more, and the activation operation is frequent more, and above-mentioned negative effect is remarkable more.
In a word, activate successfully back UE at SCell in the prior art and can not carry out the CSI measurement report in time, accurately, make eNB can't dispatch said SCell exactly, and then cause wireless resource utility efficiency to reduce.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of method of measurement and system of channel status indication, and SCell reports the problem that makes that SCell can not accurately be dispatched owing to UE can not promptly and accurately carry out the channel status indication in the prior art after just activating successfully to solve.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of channel status indication (CSI) method of measurement, said method comprises:
Activating time Serving cell (SCell) before, base station (eNB) sends CSI to subscriber equipment (UE) and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures.
In such scheme, said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell, eNB sends CSI to UE and measures indication, and measures the subframe position of specifying beginning CSI to measure in the indication at this CSI; UE receives after said CSI measures indication, and when arriving the subframe position that beginning CSI that said CSI measures appointment in the indication measures, beginning CSI measures.
In such scheme, said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell; ENB sends CSI measurement indication to UE, and in this CSI measurement indication, specifies the subframe position that reports the CSI measurement result, after UE receives said CSI measurement indication; Measure the subframe position that reports the CSI measurement result of appointment in the indication according to said CSI; Confirm the subframe position that beginning CSI measures, and when the subframe position that the determined beginning of arrival CSI measures, beginning CSI measures
In such scheme, said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell; ENB sends CSI to UE and measures indication; And this CSI measure indication beginning CSI measures in the indication subframe position, with send this CSI and measure the time offset between the subframe position of indicating; UE according to the subframe position that said CSI measures the time offset of indication in the indication and receives said CSI measurement indication, confirms the subframe position that beginning CSI measures after receiving said CSI measurement indication; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
In such scheme, said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell, eNB sends CSI to UE and measures indication, and this CSI measure subframe position that indication in the indication reports CSI to measure, with send this CSI and measure the time offset between the subframe position of indicating;
After UE receives said CSI measurement indication; Measure the time offset of indication in the indication and receive the subframe position that said CSI measures indication according to said CSI; Confirm to report the subframe position of CSI measurement,, confirm the subframe position that beginning CSI measures again according to the determined subframe position that reports CSI to measure; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
In such scheme, said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Measure beginning opportunity or CSI reporting measuring result opportunity at UE configuration CSI in advance; Before activating SCell; ENB sends CSI to UE and measures indication; After UE receives said CSI measurement indication; Measure beginning opportunity or CSI reporting measuring result opportunity according to pre-configured CSI, confirm the subframe position that beginning CSI measures, and when arriving determined subframe position, begin CSI and measure.
In such scheme, before activating SCell, eNB sends CSI to UE and measures indication, is specially:
At the media access control layer control unit (MAC CE) that is used to activate SCell to the UE transmission before, eNB measures indication through dedicated signaling with said CSI and sends to UE.
In such scheme, said eNB measures indication through dedicated signaling with said CSI and sends to UE, is specially:
Before being used to activate the MAC CE of SCell to the UE transmission, said eNB carries MAC CE or radio resource control layer (RRC) signaling or Physical Downlink Control Channel (PDCCH) signaling that said CSI measures indication to said transmission.
In such scheme, measure indication at said UE according to said CSI, carry out also comprising in the CSI measurement:
The watchdog timer that a CSI measures is set in advance; After said UE begins the CSI measurement; Start said watchdog timer; After said watchdog timer was overtime, said UE did not receive said MAC CE or the SCell that is used to activate SCell and activates failure, then stopped said CSI and measured or report.
In such scheme, said method also comprises: when deexcitation SCell, eNB sends to UE and stops CSI measurement indication or continue CSI measurement indication; Said UE measures indication or continues CSI measurement indication according to the said CSI that stops, and stops or continuing CSI and measure.
In such scheme; When deexcitation SCell; ENB sends to UE and stops CSI measurement indication or continue CSI measurement indication; Be specially: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB will the said CSI of stopping to measure indication or continues the CSI measurement and indicate and send to UE through dedicated signaling.
In such scheme; Said eNB measures indication with the said CSI of stopping or continuing CSI measurement indication through dedicated signaling and sends to UE; Be specially: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB sends to UE and carries the said CSI of stopping and measuring indication or continue CSI and measure MACCE or the RRC signaling or the PDCCH signaling of indicating.
The present invention also provides a kind of CSI measuring system, and said system comprises: eNB and UE, wherein,
ENB was used for before activating SCell, sent CSI to UE and measured indication;
UE, the CSI that is used for sending according to said eNB measures indication, carries out CSI and measures.
In such scheme, said eNB also is used for when deexcitation SCell, sends to said UE to stop CSI measurement indication or continue CSI measurement indication;
Said UE also is used for measuring indication or continuing CSI measurement indication according to the CSI that stops that said eNB sends, and stops or continuing CSI and measure.
CSI method of measurement of the present invention and system before activating SCell, send CSI by eNB to UE and measure indication; Make UE to measure indication according to this CSI; In time begin the CSI measurement and obtain CSI measurement result accurately, can guarantee that after activating the SCell success, UE CSI reporting measuring result accurately gives eNB; Thereby promptly can accurately be dispatched after making SCell activate successfully; Help improving wireless resource utility efficiency and cell throughout, especially more for the SCell number that activates or situation that the activation operation is more frequent has significant more scheduling gain.
Description of drawings
Fig. 1 is the activation process sketch map of SCell in the prior art;
Fig. 2 is for carrying out the sketch map that CSI measures after SCell activates successfully in the prior art;
Fig. 3 is the realization flow figure of CSI method of measurement of the present invention;
Fig. 4 is for being used for the MAC CE form sketch map of activation in the prior art;
Fig. 5 is the form sketch map of MAC CE after increasing field at the MAC CE that is used for activation;
Fig. 6 is the form sketch map that is used to indicate UE to stop or continues the MAC CE that the CSI of SCell measures;
Fig. 7 is the realization flow figure that CQI measures in the embodiment of the invention one;
Fig. 8 is the realization flow figure that the embodiment of the invention two CQI measure;
Fig. 9 is the realization flow figure that the embodiment of the invention three CQI measure.
Embodiment
Basic thought of the present invention is: eNB sent CSI to UE and measures indication before activating SCell, after UE receives said CSI measurement indication; Measure indication according to said CSI, carry out CSI and measure, so; UE just can be when SCell activates successfully; Obtain CSI measurement result accurately, and in time report eNB, make SCell after activating successfully, can access accurate scheduling.
CSI method of measurement of the present invention with reference to shown in Figure 3, mainly may further comprise the steps:
Step 101: before activating SCell, eNB sends CSI to UE and measures indication;
Here, said CSI can comprise one or more among CQI, PMI, the RI.
Step 102: said UE measures indication according to said CSI, carries out CSI and measures.
Particularly, before activating SCell, eNB sends CSI to UE and measures indication, and said UE measures indication according to said CSI, carries out the process that CSI measures, and can realize through following five kinds of modes:
Mode one: before activating SCell, eNB sends CSI to UE and measures indication, and measures the subframe position of specifying beginning CSI to measure in the indication at this CSI; UE receives after said CSI measures indication, and when arriving the subframe position that beginning CSI that said CSI measures appointment in the indication measures, beginning CSI measures.
Mode two: before activating SCell; ENB sends CSI measurement indication to UE, and in this CSI measurement indication, specifies the subframe position that reports the CSI measurement result, after UE receives said CSI measurement indication; Measure the subframe position that reports the CSI measurement result of appointment in the indication according to said CSI; Confirm the subframe position that beginning CSI measures, and when the subframe position that the determined beginning of arrival CSI measures, beginning CSI measures.
Mode three: before activating SCell; ENB sends CSI to UE and measures indication; And this CSI measure indication beginning CSI measures in the indication subframe position, with send this CSI and measure the time offset between the subframe position of indicating; UE according to the subframe position that said CSI measures the time offset of indication in the indication and receives said CSI measurement indication, confirms the subframe position that beginning CSI measures after receiving said CSI measurement indication; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
Mode four: before activating SCell; ENB sends CSI to UE and measures indication, and measures subframe position that indication in the indication reports CSI to measure, measures the time offset between the subframe position of indication with sending this CSI at this CSI, UE receive said CSI measure indicate after; Measure the time offset of indication in the indication and receive the subframe position that said CSI measures indication according to said CSI; Confirm to report the subframe position of CSI measurement,, confirm the subframe position that beginning CSI measures again according to the determined subframe position that reports CSI to measure; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
Mode five: measure beginning opportunity or CSI reporting measuring result opportunity at UE configuration CSI in advance; Before activating SCell; ENB sends CSI to UE and measures indication; After UE receives said CSI measurement indication; Measure beginning opportunity or CSI reporting measuring result opportunity according to pre-configured CSI, confirm the subframe position that beginning CSI measures, and when arriving determined subframe position, begin CSI and measure.
Here; Measuring the process on beginning opportunity or CSI reporting measuring result opportunity at UE configuration CSI in advance can be: eNB through the RRC signaling said CSI is measured beginning opportunity in advance or the CSI reporting measuring result sends to said UE opportunity, and UE receives that said CSI measures beginning opportunity or the CSI reporting measuring result was preserved after opportunity.
Wherein, CSI measure beginning specifically can be opportunity indication UE when carrying out that periodically CSI measures CSI measure the periodic quantity of beginning; The CSI reporting measuring result specifically can be the periodic quantity of indication UE CSI reporting measuring result when carrying out that periodically CSI measures opportunity.
Here; The subframe position that the subframe position that above-mentioned beginning CSI measures, the subframe position that reports the CSI measurement result, beginning CSI measure with send this CSI and measure time offset between the subframe position of indication, report subframe position that CSI measures and send this CSI and measure time offset between the subframe position of indicating, CSI measurement beginning opportunity, CSI reporting measuring result opportunity; Confirm according to self dispatching algorithm and transmission reception sequential by eNB; Detailed process is a prior art, repeats no more at this.
Wherein, in the step 101, before activating SCell, eNB sends CSI to UE and measures indication, is specially: before being used to activate the MAC CE of SCell to the UE transmission, eNB measures indication through dedicated signaling with said CSI and sends to UE.
Particularly; In advance eNB configuration to UE send CSI measure indication subframe, with time interval between the subframe of the said MAC CE that is used to activate SCell of UE transmission; ENB is according to the subframe position of sending the said MAC CE that is used to activate SCell to UE and the pre-configured said time interval; Confirm to measure the subframe position of indication, and arrive confirm when UE sends the subframe position of CSI measurement indication, send to UE and carry the dedicated signaling that CSI measures indication to UE transmission CSI.
Here, said to UE send CSI measure indication subframe, with the subframe of sending the said MAC CE that is used to activate SCell to UE between the time interval, general requirement is not less than a reference time n
CQI_ref, guaranteeing when activating SCell, UE can access accurately the CSI measurement result and report eNB, in the prior standard standard, and this reference time n
CQI_refBe 4ms, it is 4ms that this time interval then can be set in eNB.In addition, can also come the set time interval of suitably adjustment according to the actual treatment ability of UE and the processing delay of carrying the dedicated signaling of said CSI measurement indication.
Here; Before being used to activate the MAC CE of SCell to the UE transmission; ENB measures indication through dedicated signaling with said CSI and sends to UE, specifically can for: send to UE be used to activate the MAC CE of SCell before, eNB sends to UE and carries the MAC CE that said CSI measures indication.
Wherein, carry said CSI and measure the field that comprises the cell index field (CIF, Cell Index Field) that remains to be activated SCell and be used to represent said CSI measurement indication among the MAC CE of indication.
Particularly, 1 bit is corresponding to the CIF of a SCell in the MAC CE bitmap, and CIF can SCell of unique representative.
Be used for the MAC CE form of activation in the prior art, as shown in Figure 4, MAC CE comprises MAC head (MAC sub header) and MAC payload (payload); Wherein, MAC head comprises 8 bits, and two " R " are respectively 1 bit; Be reserved field, value is 0, and " E " is 1 bit; Be extended field, whether expression MAC head also has more multiword section; " LCID " is 5 bits, is the Logic Channel Identifier field, the type of expression Medium Access Control (MAC) Protocol Data Unit (PDU, Protocol Data Unit) or MAC CE; The form of MAC payload is " C
7/ C
6/ C
5/ C
4/ C
3/ C
2/ C
1/ R ", each field takies 1 bit totally 1 byte, wherein " C respectively
7～C
1" being used to all represent that each SCell cell index of UE, value are that 1 expression activates the pairing SCell of this cell index, value is the pairing SCell of 0 expression this cell index of deexcitation, and " R " is reserved field, and value is 0.
Among the present invention, comprise and remain to activate the CIF of SCell and be used to represent that said CSI measures the MAC CE form of field of indication identical with Fig. 4, different is: the value difference of " LCID " in the MAC head, represent that current MAC CE is used to indicate the CSI measurement; In the MAC CE payload, " C7～C1 " representative be used to represent each SCell cell index of UE, value be 1 expression current C SI surveyingpin to the pairing SCell of this cell index, value is that 0 expression current C SI measures with the pairing SCell of this cell index irrelevant.
Perhaps; " R " field in the MAC CE payload can also be redefined, for example, " R " field in the MAC CE payload can be defined; In value is to represent to begin current C SI at 1 o'clock to measure or report the CSI measurement result; Value is that 0 expression does not begin current C SI measurement or do not report the CSI measurement result, and here, " R " field that redefines in the MAC CE payload comes into force to all SCell of UE.
Here, eNB can dispose following information in advance in UE: when receiving this CSI measurement indication, begin CSI in current subframe and measure; Perhaps the n sub-frame after the subframe when receiving CSI measurement indication begins the CSI measurement or reports the CSI measurement result; Here; N is a positive integer; By eNB in advance in UE configuration or eNB in said MAC CE, specify, make UE after receiving said MAC CE, can begin CSI according to the subframe position of appointment and measure or report the CSI measurement result.
Here, eNB can come to begin CSI through the n sub-frame of said MAC CE indication UE after receiving said MAC CE and measure or report the CSI measurement result through increasing the message bit pattern that is used to indicate number of sub-frames among the said MAC CE.
Here; Before being used to activate the MAC CE of SCell to the UE transmission; ENB measures indication through dedicated signaling with said CSI and sends to UE, can also for: send to UE be used to activate the MAC CE of SCell before, eNB sends to UE and carries the RRC signaling that said CSI measures indication.
Particularly, in existing RRC signaling, increase a cell, this cell includes the CIF that said CSI measures indication and waits to activate SCell.Here, said RRC signaling can be wireless resource control connection reconfiguration (RRC Connection Reconfiguration) signaling or newly-increased RRC signaling.
Perhaps, can also in existing RRC signaling, increase a cell, this cell can only include said CSI and measure indication, so, can represent that current C SI surveyingpin is for all SCell of UE.
Here; Before being used to activate the MAC CE of SCell to the UE transmission; ENB measures indication through dedicated signaling with said CSI and sends to UE, can also for: send to UE be used to activate the MAC CE of SCell before, eNB sends to UE and carries the PDCCH signaling that said CSI measures indication.
Particularly, can in the PDCCH signaling, increase a field, this field includes the CIF that said CSI measures indication and waits to activate SCell.Here, said RRC signaling can be wireless resource control connection reconfiguration (RRC Connection Reconfiguration) signaling or newly-increased RRC signaling.
Perhaps, can in the PDCCH signaling, increase a field, this field can only include said CSI and measure indication, so, can represent that current C SI surveyingpin is for all SCell of UE.
In the practical application; ENB can be through said UE PCell or arbitrary SCell that is in state of activation, with said comprise remain to activate the CIF of SCell and be used to represent said CSI measure the MAC CE of the field of indication, or carry CSI measure indication the RRC signaling, or carry the PDCCH signaling that CSI measures indication and send to said UE.
Here; In step 102, can also comprise: the watchdog timer that a CSI measures is set in advance, after said UE begins the CSI measurement; Start said watchdog timer; After said watchdog timer was overtime, said UE did not receive said MAC CE or the SCell that is used to activate SCell and activates failure, then stopped said CSI and measured or report.
Wherein, the duration of said watchdog timer can be provided with according to actual needs, specifically can confirm according to the actual treatment ability of UE.
In addition, method of the present invention can also comprise: when deexcitation SCell, eNB sends to UE and stops CSI measurement indication or continue CSI measurement indication; Said UE measures indication or continues CSI measurement indication according to the said CSI that stops, and stops or continuing CSI and measure.
Particularly; When deexcitation SCell; ENB sends to UE and stops CSI measurement indication or continue CSI measurement indication; Be specially: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB will the said CSI of stopping to measure indication or continues the CSI measurement and indicate and send to UE through dedicated signaling.
Here; ENB measures indication with the said CSI of stopping or continuing CSI measurement indication through dedicated signaling and sends to UE; Can for: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB sends to UE and carries the said CSI of stopping and measuring indication or continue CSI and measure the MAC CE that indicates.
Wherein, Can increase field at the said MAC CE that is used for deexcitation SCell, the field that is increased comprises the CIF that treats deexcitation SCell and is used to represent that the said CSI of stopping to measure indication or continues CSI measurement indication, afterwards; The said MAC CE that is used for deexcitation SCell is sent to UE; So, in deexcitation SCell, also carried out CSI to this SCell measures stop or continuing and operated.
Perhaps, can also pass through an independent MAC CE, indicate UE to carry out CSI to this SCell measures stop or continuing and operate.Particularly; Through defining the implication of field among the MAC CE " R " again; Obtaining carrying the said CSI of stopping to measure indication or continues the MAC CE that CSI measures indication; Then resultant MAC CE and said is used for that the MAC CE of deexcitation SCell is multiplexing to be sent at a MAC PDU, perhaps, perhaps resultant MAC CE and the said MAC CE that is used for deexcitation SCell is sent simultaneously resultant MAC CE transmission after sending the said MAC CE that is used for deexcitation SCell.
In the practical application; In the said process that is used for the MAC CE increase field of deexcitation SCell, can be:, increase a plurality of fields at original MAC CE with reference to shown in Figure 5; The SCell of expression correspondence respectively is in the deexcitation continued or stop the CSI measurement; For example, can in the MAC of original MAC CE payload, increase by 1 Byte, " C '
7/ C '
6/ C '
5/ C '
4/ C ' 3/C '
2/ C '
1/ R ' " information of totally 8 bits; each bit is a field; each field comprises the cell index of a SCell, and the value of each field is represented to continue or stop CSI measuring, for example; value be that the CSI that " 1 " expression continues corresponding SCell measures, and value stops the CSI measurement of corresponding SCell for " 0 " expression.One by deexcitation after, if the field value of cell index that includes this SCell this moment for " 1 ", the CSI that then continues this SCell measures, if be " 0 ", then stops the CSI measurement of this SCell.
In the practical application; Through an independent MAC CE, indicate UE to stop or the CSI that continuing SCell when measuring, with reference to shown in Figure 6; The form of this MAC CE is identical with existing MAC CE form; Different is, redefines " R " bit in its MAC head or the MAC payload, " R " expression to all SCell in the deexcitation continued or stop CSI and measure.For example, the implication of " R " bit of definition MAC head is " any SCell is in the deexcitation continued or stop the CSI measurement ", and value is that " 1 " expression continues, and value stops for " 0 " expression.Any one or more SCell by deexcitation after, if this field value is " 1 ", the CSI that then continues said SCell measures, if value be " 0 ", then stops the CSI measurement of said SCell.
Here; ENB measures indication with the said CSI of stopping or continuing CSI measurement indication through dedicated signaling and sends to UE; Can also for: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB sends to UE and carries the said CSI of stopping and measuring indication or continue CSI and measure the RRC signaling of indicating.
Particularly, through in existing RRC signaling, increasing a cell, this cell representes that the said CSI of stopping to measure indication or continues CSI measurement indication.For example, can define this cell value is that TRUE or 1 expression continue, and value is that FALSE or 0 expression stop.In addition, can also in cell, comprise the CIF of SCell, be convenient to corresponding indication information is set respectively to each SCell.If do not comprise the CIF of SCell, then this cell can be to all SCell or the SCell of all deactivation status.Here, said RRC signaling can pre-configured or dynamic transmission, and said RRC signaling can be wireless resource control connection reconfiguration (RRCConnection Reconfiguration) signaling or newly-increased RRC signaling.
Here; ENB measures indication with the said CSI of stopping or continuing CSI measurement indication through dedicated signaling and sends to UE; Can also for: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB sends to UE and carries the said CSI of stopping and measuring indication or continue CSI and measure the PDCCH signaling of indicating.
Particularly, through in the PDCCH signaling, increasing a field, this field representes that the said CSI of stopping to measure indication or continues CSI measurement indication.The CIF that can also in this field, comprise SCell is convenient to corresponding PDCCH signaling is set to each SCell, indicates the continuation that CSI measures or stops.If do not comprise the CIF of SCell, then this PDCCH signaling can be to all SCell or the SCell of all deactivation status.
Accordingly, the present invention also provides a kind of CSI measuring system, and said system mainly comprises: eNB and UE, and wherein, eNB was used for before activating SCell, sent CSI to UE and measured indication; UE, the CSI that is used for sending according to said eNB measures indication, carries out CSI and measures.
Wherein, said eNB also is used for when deexcitation SCell, sends to said UE to stop CSI measurement indication or continue CSI measurement indication; Said UE also is used for measuring indication or continuing CSI measurement indication according to the CSI that stops that said eNB sends, and stops or continuing CSI and measure.
Embodiment one
In the present embodiment, UE has disposed PCell, SCell_1, SCell_2, and wherein, SCell_1 is in state of activation, SCell_2 is in deactivation status, and the CQI that carries out SCell_2 measures, and is as shown in Figure 7, and concrete realization flow may further comprise the steps:
Step 201:eNB carried the MAC CE that the CQI measurement begins to indicate at subframe n-4 to the UE transmission before preparing to activate SCell_2;
Here, eNB also can carry MAC CE that CQI measurements begin to indicate to UE sending early than the subframe of subframe n-4.
Here, the subframe that eNB can indicate the CQI of SCell_2 to report in MAC CE is n+8, and then in step 204, UE can confirm to begin the CQI measurement of SCell_2 at subframe n+2 according to the subframe position n+8 that reports the CQI measurement result.
Here, eNB can also begin indication to UE through carrying the CQI measurement in the RRC signaling.In the practical application, because UE can be greater than MAC CE for the processing delay of RRC signaling, the subframe of sending the RRC signaling will be early than subframe n-4.
Here, consider that eNB receives and the required processing delay of decoding CQI measurement result, eNB sends and possibly shift to an earlier date more the opportunity that carries the MAC CE that the CQI measurement begins to indicate, for example at subframe n-8.
Step 202:eNB sends the MAC CE that is used to activate SCell_2 at subframe n.
The MAC CE success that step 203:UE begins to indicate in the said CQI of the carrying measurement of subframe n-1 decoding is in this MAC CE success of subframe n+2 demultiplexing.
Here, UE is relevant with the disposal ability of UE to the successful time of the MAC CE that receives decoding success or demultiplexing, and subframe n-1 and n+2 are merely and illustrate here, also maybe be slightly early than or be later than subframe n-1 and subframe n+ 2.
Step 204:UE measures at the CQI that subframe n+2 begins SCell_2, obtains CQI measurement result accurately at subframe n+4, reports resulting CQI measurement result at subframe n+8 to eNB.
Here; UE measures the time that CQI measurement result is accurately consumed that obtains from beginning CQI; Relevant with the actual treatment ability of UE; UE in the present embodiment measures from beginning CQI and obtains accurately that the CQI measurement result has consumed the time of 2 sub-frame, and the CQI measurement result also need be through a reference time n-n to reporting this CQI measurement result accurately from obtaining
CQI_ref, according to existing standard, this reference time n-n
CQI_refBe 4ms, just 4 sub-frame.
Step 205:UE receives the MAC CE that is used to activate SCell_2 at subframe n, and is in this MAC CE success of n+3 decoding, successful to this MAC CE demultiplexing at subframe n+6.
Here, UE is to the time that MAC CE decodes and demultiplexing consumed, and is relevant with the disposal ability of UE itself.
Step 206:eNB receives the CQI measurement result that UE reports at subframe n+8, and according to received CQI measurement result, begins to dispatch SCell_2.
Step 207:UE periodically carries out the CQI measurement and gives eNB with the CQI reporting measuring result that obtains according to pre-configured sequential.
In the present embodiment; Can also comprise in step 203: UE starts watchdog timer T simultaneously at subframe n+2; If after watchdog timer T is overtime; UE does not also receive the MAC CE that is used to activate SCell_2 that eNB sends, and perhaps at arbitrary operation failure of step 205, then UE stops the CQI measurement of SCell_2 after watchdog timer T is overtime.
Present embodiment is equally applicable to PMI/RI and measures.
Embodiment two
In the present embodiment, UE has disposed PCell, SCell_1, SCell_2, and wherein, SCell_1 and SCell_2 all are in state of activation, carries out the process that CQI measures, and is as shown in Figure 8, and concrete realization flow may further comprise the steps:
Step 301:eNB stops after deexcitation at configuration SCell_1 on the UE in advance through the RRC signaling in advance that CQI measures, SCell_2 measures at deexcitation continued CQI.
Step 302:eNB is SCell_1 and SCell_2 configuration cycle property CQI measurement report through the RRC signaling in advance.
Step 303:eNB sends the MAC CE that is used for deexcitation SCell_1 and SCell_2, deexcitation SCell_1 and SCell_2 at subframe n.
Step 304:UE receives the MAC CE that is used for deexcitation SCell_1 and SCell_2 at subframe n, decodes successfully at n+3, in the success of subframe n+6 demultiplexing, in subframe n+8 deexcitation SCell_1 and SCell_2 success.
The CQI that step 305:UE subframe n+8 stops SCell_1 measuring, and according to pre-configured sequential, the CQI that continues SCell_2 measures.
Step 306: after a period of time, eNB accurately activates SCell_1, sends the MAC CE that carries CQI measurement indication at subframe n+32 and gives UE, begins CQI at SCell_1 and measures, and UE obtains CQI measurement result accurately at subframe n+40.
Step 307:eNB sends the MAC CE that is used to activate SCell_1 at subframe n+36;
Step 308:UE reports CQI measurement result accurately at subframe n+44 to eNB, and UE activates the SCell_1 success at subframe n+44.
Here, step 301 and step 302 can use same RRC signaling to be configured, and connect like RRC and reshuffle signaling.
Here, if after a period of time, eNB need activate SCell_2, can not need before activating SCell_2, send CQI measurements to UE and begin indication because after the SCell_2 deexcitation, the CQI of SCell_2 measures still in continuation.
Present embodiment is equally applicable to PMI/RI and measures.
Embodiment three
UE has disposed PCell, SCell_1, SCell_2, and wherein, SCell_1 and SCell_2 all are in state of activation, carries out the process that CQI measures, and is as shown in Figure 9, and concrete realization flow may further comprise the steps:
Step 401:eNB is SCell_1 and SCell_2 configuration cycle property CQI measurement report through the RRC signaling in advance.
Step 402:eNB sends the MAC CE that is used for deexcitation SCell_1 and SCell_2, deexcitation SCell_1 and SCell_2 at subframe n.
Step 403:eNB sends at subframe n and is used to indicate the CQI reporting measuring result that stops SCell_1, the MAC CE that continues the CQI reporting measuring result of SCell_2.
Step 404:UE receives the MAC CE that is used for deexcitation SCell_1 and SCell_2 at subframe n, in subframe n+8 deexcitation SCell_1 and SCell_2 success.
Step 405:UE receives at subframe n and is used to indicate the CQI reporting measuring result that stops SCell_1, the MAC CE that continues the CQI reporting measuring result of SCell_2, in this MAC CE success of subframe n+6 demultiplexing, and carries out corresponding operation.
Step 406: after a period of time, eNB prepares to activate SCell_1, sends at subframe n+32 and carries the MAC CE that CQI measures indication, begins CQI at SCell_1 and measures, and UE obtains the CQI measurement result of SCell_1 accurately at subframe n+44.
Step 407:eNB sends the MAC CE that is used to activate SCell_1 at subframe n+36, and UE activates the SCell_1 success at subframe n+44, and reports the CQI measurement result of SCell_1 to give eNB.
Present embodiment is equally applicable to PMI/RI and measures.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (14)
1. a channel status is indicated (CSI) method of measurement, it is characterized in that said method comprises:
Activating time Serving cell (SCell) before, base station (eNB) sends CSI to subscriber equipment (UE) and measures indication;
Said UE measures indication according to said CSI, carries out CSI and measures.
2. according to the said CSI method of measurement of claim 1, it is characterized in that said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell, eNB sends CSI to UE and measures indication, and measures the subframe position of specifying beginning CSI to measure in the indication at this CSI; UE receives after said CSI measures indication, and when arriving the subframe position that beginning CSI that said CSI measures appointment in the indication measures, beginning CSI measures.
3. according to the said CSI method of measurement of claim 1, it is characterized in that said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell; ENB sends CSI measurement indication to UE, and in this CSI measurement indication, specifies the subframe position that reports the CSI measurement result, after UE receives said CSI measurement indication; Measure the subframe position that reports the CSI measurement result of appointment in the indication according to said CSI; Confirm the subframe position that beginning CSI measures, and when the subframe position that the determined beginning of arrival CSI measures, beginning CSI measures
4. according to the said CSI method of measurement of claim 1, it is characterized in that said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell; ENB sends CSI to UE and measures indication; And this CSI measure indication beginning CSI measures in the indication subframe position, with send this CSI and measure the time offset between the subframe position of indicating; UE according to the subframe position that said CSI measures the time offset of indication in the indication and receives said CSI measurement indication, confirms the subframe position that beginning CSI measures after receiving said CSI measurement indication; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
5. according to the said CSI method of measurement of claim 1, it is characterized in that said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Before activating SCell, eNB sends CSI to UE and measures indication, and this CSI measure subframe position that indication in the indication reports CSI to measure, with send this CSI and measure the time offset between the subframe position of indicating;
After UE receives said CSI measurement indication; Measure the time offset of indication in the indication and receive the subframe position that said CSI measures indication according to said CSI; Confirm to report the subframe position of CSI measurement,, confirm the subframe position that beginning CSI measures again according to the determined subframe position that reports CSI to measure; And when arriving the subframe position of determined beginning CSI measurement, beginning CSI measures.
6. according to the said CSI method of measurement of claim 1, it is characterized in that said before activating SCell, eNB sends CSI to UE and measures indication; Said UE measures indication according to said CSI, carries out CSI and measures, and is specially:
Measure beginning opportunity or CSI reporting measuring result opportunity at UE configuration CSI in advance; Before activating SCell; ENB sends CSI to UE and measures indication; After UE receives said CSI measurement indication; Measure beginning opportunity or CSI reporting measuring result opportunity according to pre-configured CSI, confirm the subframe position that beginning CSI measures, and when arriving determined subframe position, begin CSI and measure.
7. according to each said CSI method of measurement of claim 1 to 6, it is characterized in that before activating SCell, eNB sends CSI to UE and measures indication, is specially:
At the media access control layer control unit (MAC CE) that is used to activate SCell to the UE transmission before, eNB measures indication through dedicated signaling with said CSI and sends to UE.
8. according to the said CSI method of measurement of claim 7, it is characterized in that said eNB measures indication through dedicated signaling with said CSI and sends to UE, is specially:
Before being used to activate the MAC CE of SCell to the UE transmission, said eNB carries MAC CE or radio resource control layer (RRC) signaling or Physical Downlink Control Channel (PDCCH) signaling that said CSI measures indication to said transmission.
9. according to each described CSI method of measurement of claim 1 to 6, it is characterized in that, measure indication according to said CSI, carry out also comprising in the CSI measurement at said UE:
The watchdog timer that a CSI measures is set in advance; After said UE begins the CSI measurement; Start said watchdog timer; After said watchdog timer was overtime, said UE did not receive said MAC CE or the SCell that is used to activate SCell and activates failure, then stopped said CSI and measured or report.
10. CSI method of measurement according to claim 1 is characterized in that, said method also comprises:
When deexcitation SCell, eNB sends to UE and stops CSI measurement indication or continue CSI measurement indication;
Said UE measures indication or continues CSI measurement indication according to the said CSI that stops, and stops or continuing CSI and measure.
11. according to the said CSI method of measurement of claim 10; It is characterized in that; When deexcitation SCell; ENB sends to UE and stops CSI and measure indication or continue CSI and measure indication, is specially: after UE sends the MAC CE that is used for deexcitation SCell or simultaneously, eNB will the said CSI of stopping to measure indication or continues the CSI measurement and indicate and send to UE through dedicated signaling.
12. according to the said CSI method of measurement of claim 10; It is characterized in that; Said eNB measures indication with the said CSI of stopping or continuing CSI measurement indication through dedicated signaling and sends to UE; Be specially: after sending the MAC CE be used for deexcitation SCell to UE or simultaneously, eNB sends to UE and carries the said CSI of stopping and measuring indication or continue CSI and measure MAC CE or the RRC signaling or the PDCCH signaling of indicating.
13. a CSI measuring system is characterized in that, said system comprises: eNB and UE, wherein,
ENB was used for before activating SCell, sent CSI to UE and measured indication;
UE, the CSI that is used for sending according to said eNB measures indication, carries out CSI and measures.
14. CSI measuring system according to claim 13 is characterized in that,
Said eNB also is used for when deexcitation SCell, sends to said UE to stop CSI measurement indication or continue CSI measurement indication;
Said UE also is used for measuring indication or continuing CSI measurement indication according to the CSI that stops that said eNB sends, and stops or continuing CSI and measure.
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