CN102624494B - A kind of channel status indicates measuring method and system - Google Patents
A kind of channel status indicates measuring method and system Download PDFInfo
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- CN102624494B CN102624494B CN201110029622.3A CN201110029622A CN102624494B CN 102624494 B CN102624494 B CN 102624494B CN 201110029622 A CN201110029622 A CN 201110029622A CN 102624494 B CN102624494 B CN 102624494B
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Abstract
(CSI) measuring method is indicated the invention discloses a kind of channel status, methods described includes：Before activation SCell, eNB sends CSI measurements to UE and indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements.Accordingly, present invention also offers a kind of CSI measuring systems, it ensure that after activation SCell successes, accurate CSI measurement results are reported eNB by UE, so that SCell can be dispatched accurately after activating successfully, be conducive to improving wireless resource utility efficiency and cell throughout, the SCell numbers particularly with activation are more or activation/deactivation operates more frequently situation, there are more significant scheduling gains.
Description
Technical field
Indicate that technology, more particularly to a kind of channel status indicate measuring method and be the present invention relates to the channel of the communications field
System.
Background technology
Third generation partnership project (3GPP, Third Generation Partnership Projects) is drilled for a long time
Enter universal land radio access web (E-UTRAN, the Evolved of evolution in (LTE, Long Term Evolution) system
Universal Terrestrial Radio Access Network) it is made up of base station (eNB).The downlink multi-access of LTE system
Technology is orthogonal frequency-time multiple access (OFDMA, Orthogonal Frequency Division Multiple Access),
Uplink multi-address technology is that single-carrier frequency division multiple access accesses (SC-FDMA, Single Carrier Frequency Division
Multiple Access).Radio interface protocols between eNB and user equipment (UE, User Equipment) 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 constituted.Descending (DL, Downlink) thing
Managing channel includes Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel), physical down
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 (PBCH, Physical
Broadcast Channel), Physical Multicast Channel (PMCH, Physical Multicast Channel).Up (UL,
Uplink) physical channel includes Physical Random Access Channel (PRACH, Physical Random Access Channel), thing
Manage ascending control channel (PUCCH, Physical Uplink Control Channel), Physical Uplink Shared Channel (PUSCH,
Physical Uplink Share Channel).It is a length of 10 milliseconds (ms) during the radio frames of LTE system, by 10 subframes
(Subframe) constitute, each subframe duration is 1ms, 1 subframe is 1 Transmission Time Interval (TTI, Transmission
Time Interval)。
In 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) exists
Most 5 component carriers (CC, Component Carrier) are aggregating by downlink and uplink respectively, with downlink and uplink
Support maximum 100MHz transmission bandwidths.UE needs to configure 1 downlink main carrier to carry (DL PCC, Downlink Primary CC)
With 1 up main carrier (UL PCC, Uplink Primary CC), can with set to 0~4 descending secondary carriers (DL SCC,
Downlink Secondary CC) and/or 0~4 upstream auxiliary carriers (UL SCC, Uplink Secondary CC).Wherein,
DL PCC and UL PCC constitute UE main serving cell (PCell), and PCell provides safety and Non-Access Stratum mobility information
The function, UE Stochastic accessings such as (security and NAS mobility Info), synchronization, access, transmission system information, paging
It can only be carried out by PCell, UL PCC are configured with transmission hybrid automatic repeat-request (HARQ, Hybrid Automatic
Repeat Request) confirm (ACK)/non-acknowledgement (NACK), dispatch request (SR, Scheduling Request), channel matter
The PUCCH resource of the signalings such as amount instruction (CQI, Channel Quality Indicator).The UL SCC that DL SCC are associated with it
Composition time serving cell (SCell), SCell provides higher bandwidth and data throughout as increased Radio Resource for UE,
SCell may also not include UL SCC.UL PCC and DL PCC pass through system information block 2 (SIB_2, System
Information Block 2) indicated by information association, UL SCC and DL SCC passes through SIB2 or dedicated signaling such as RRC
Information association indicated by signaling.Whenever, the UE in RRC connections (RRC_CONNECTED) state must maintain one
Individual PCell configuration.
LTE-A CA support cross scheduling (Cross Scheduling), are configured according to RRC, a SCell can be received
Descending distribution (DL Assignment) and/or uplink authorization (UL on PCell or other SCell transmitted by PDCCH
Grant).Wherein, cross scheduling is by increasing cell index field (CIF, Cell Index in transmitting signaling in PDCCH
Field) realize, here, cell index (Cell Index) one that the CIF and UE transmitted on PDCCH is pre-configured with by RRC
One correspondence.In LTE-A CA discontinuous reception (DRX, Discontinuous Reception) scheme, 3GPP is adopted point
The consistent or common DRX of loading gage ripple (Common DRX) or the specific DRX of referred to as UE are specific as follows as basic scheme：For
All PCell and SCell of UE configurations use identical DRX parameters, and the SCell and PCell of all activated state follow identical
Activity time (active time) and DRX circulations, the angle managed from further UE power savings and CC, eNB can lead to
Media access control layer control unit (MAC CE, Medium Access Control Control Element) is crossed to activate/go
(activation/deactivation) UE SCell is activated, UE descending is not listening in the SCell of deactivation status
PDCCH, the measurement that PDSCH is not received, (CQI) correlation is indicated without channel quality, non-reception system information, support mobility
Related RRM (RRM, Radio Resource Management) measurement；Also, for deactivation status
The up stopping detection reference signals (SRS, Sounding Reference Signal) of SCell that SCell is associated by SIB_2
Transmission/channel quality instruction (CQI, Channel Quality Indicator) transmission/pre-coding matrix instruction (PMI,
Precoding Matrix Indicator) transmission/classifying index (RI, Rank Indicator) transmission/PUSCH transmissions etc.,
Wherein, CQI/PMI/RI is referred to as channel status and indicates (CSI, Channel Status Indicator).
In current DRX schemes, UE after activation/deactivation SCell MAC CE are received, it is necessary to through reception/
Decoding/demultiplexing and the time for performing activation/deactivation operation, it can just come into force.As shown in figure 1, UE is in subframe n (subframe
N) MAC CE are received, it is necessary to which SCell activation/deactivation could be completed until subframe n+x (subframe n+x), from
Subframe n to subframe n+x time interval is defined as activationary time (Activation time), existing
X values are defined as the subframe of 8ms, i.e., 8 in 3GPP standards, and UE could only start CSI measurements after SCell is activated successfully, according to
The difference of UE abilities, UE, which generally requires 1~3ms or so, can just obtain accurate CSI measurement results, and UE is obtained accurately
CSI measurement results to report the CSI also need to wait a reference time n-nCQI_ref, for FDD (FDD,
Frequency Division Duplexing) technology, reference time n-nCQI_refIt is defined as 4ms, concrete implementation process
As shown in Figure 2, it is seen that, from SCell activation/deactivations successfully to UE can report the SCell CSI measurement results need 4~
7ms or so time.In this way, in the case of using periodic report CSI, if being pre-configured with time signal machine on CSI on UE, by
4~7ms or so time is needed in the CSI measurement results that successfully can report the SCell to UE from SCell activation/deactivations,
Accurate CSI measurement results may not be also obtained on CSI is reached during time signal machine, this allows for UE and is reported to eNB CSI to survey
Measure that result is inaccurate, so that the CSI that causes eNB and can not be reported according to UE dispatches the SCell newly activated exactly, if now new swash
SCell living has multiple, can not accurately be dispatched before the 4~7ms of these SCell upon activation, now, according to existing
There is technology, if eNB is using more conservative resource allocation such as Modulation and Coding Scheme (MCS, Modulation and Coding
Scheme) and according to transmission block (TB, Transport Block) size it is scheduled, UE data rate will be reduced and gulped down
The amount of telling, reduces dispatching efficiency, wireless resource utility efficiency also can be relatively low；If eNB uses higher MCS or larger TB sizes
It is scheduled, can cause the probability of bust this increases, so as to increase the probability that bust this needs HARQ to retransmit；If eNB
Activation/deactivation MAC CE are sent to UE in advance, then UE needs to begin listening for the SCell that will be activated in advance PDCCH/ regulations
Base band/radio frequency and beginning SRS/CQI/PMI/RI are reported, and are unfavorable for UE power savings.Also, the SCell numbers newly activated are got over
Many, activation/deactivation operation is more frequent, and above-mentioned negative effect is more notable.
In a word, in the prior art after SCell is activated successfully UE can not in time, accurately carry out CSI measurement reports, make
The SCell can not be dispatched exactly by obtaining eNB, and then cause wireless resource utility efficiency to reduce.
The content of the invention
In view of this, it is a primary object of the present invention to provide the measuring method and system that a kind of channel status is indicated, with
SCell in the prior art is solved to report and cause because UE can not promptly and accurately carry out channel status instruction after just activate successfully
The problem of SCell can not be dispatched accurately.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
(CSI) measuring method is indicated the invention provides a kind of channel status, methods described includes：
Before activation time serving cell (SCell), base station (eNB) sends CSI measurements to user equipment (UE) and indicated；Institute
State UE and instruction is measured according to the CSI, carry out CSI measurements.
Described before activation SCell in such scheme, eNB sends CSI measurements to UE and indicated；The UE is according to institute
CSI measurement instructions are stated, CSI measurements is carried out, is specially：
Before activation SCell, eNB sends CSI to UE and measures instruction, and specifies beginning CSI in CSI measurements are indicated
The subframe position of measurement；UE is received after the CSI measurements instruction, the beginning CSI specified in the CSI measurements instruction is reached
During the subframe position of measurement, start CSI measurements.
Described before activation SCell in such scheme, eNB sends CSI measurements to UE and indicated；The UE is according to institute
CSI measurement instructions are stated, CSI measurements is carried out, is specially：
Activation SCell before, eNB to UE send CSI measurement indicate, and the CSI measurement indicate in specify report CSI
The subframe position of measurement result, UE is received after the CSI measurements instruction, and that is specified in being indicated according to CSI measurements reports
The subframe position of CSI measurement results, it is determined that starting the subframe position of CSI measurements, and reaches identified beginning CSI measurements
During subframe position, start CSI measurements
Described before activation SCell in such scheme, eNB sends CSI measurements to UE and indicated；The UE is according to institute
CSI measurement instructions are stated, CSI measurements is carried out, is specially：
Before activation SCell, eNB sends CSI measurements to UE and indicated, and indicates to start CSI in CSI measurements are indicated
Time offset between the subframe position of measurement and the subframe position for sending CSI measurement instructions, UE receives the CSI
After measurement is indicated, the time offset indicated in indicating is measured according to the CSI and receives what the CSI measurements were indicated
Subframe position, it is determined that starting the subframe position of CSI measurements, and when reaching the subframe position of identified beginning CSI measurements, is opened
Beginning CSI is measured.
Described before activation SCell in such scheme, eNB sends CSI measurements to UE and indicated；The UE is according to institute
CSI measurement instructions are stated, CSI measurements is carried out, is specially：
Before activation SCell, eNB sends CSI measurements to UE and indicated, and indicates to report CSI in CSI measurements are indicated
Time offset between the subframe position of measurement and the subframe position for sending CSI measurement instructions；
UE is received after CSI measurement indicates, measured according to the CSI time offset that is indicated in indicating and
The subframe position that the CSI measurements are indicated is received, it is determined that the subframe position for reporting CSI to measure, is reported further according to identified
The subframe position of CSI measurements, it is determined that starting the subframe position of CSI measurements, and reaches the identified subframe for starting CSI measurements
During position, start CSI measurements.
Described before activation SCell in such scheme, eNB sends CSI measurements to UE and indicated；The UE is according to institute
CSI measurement instructions are stated, CSI measurements is carried out, is specially：
In advance time signal machine in beginning opportunity or CSI measurement results is measured in UE configurations CSI；Before activation SCell, eNB
Send CSI measurements to UE to indicate, UE is received after CSI measurement indicates, according to the CSI being pre-configured with measure beginning opportunity or
Time signal machine in CSI measurement results, it is determined that starting the subframe position of CSI measurements, and starts when reaching identified subframe position
CSI is measured.
In such scheme, before activation SCell, eNB sends CSI measurements to UE and indicated, is specially：
Before the media access control layer control unit (MAC CE) for activating SCell is sent to UE, eNB passes through special
CSI measurement instructions are sent to UE with signaling.
In such scheme, CSI measurement instructions are sent to UE by the eNB by dedicated signaling, are specially：
Before the MAC CE for activating SCell are sent to UE, the eNB carries the CSI to the transmission and surveyed
MAC CE or radio resource control layer (RRC) signaling or Physical Downlink Control Channel (PDCCH) signaling of amount instruction.
In such scheme, measured and indicated according to the CSI in the UE, carried out in CSI measurements, in addition to：
The supervision timer of a CSI measurement is pre-set, after the UE starts CSI measurements, starts the monitoring
Timer, after supervision timer time-out, the UE does not receive the MAC CE or SCell for being used to activate SCell
Activation failure, then stop the CSI measurements or report.
In such scheme, methods described also includes：When deactivating SCell, eNB sends stopping CSI measurements to UE and referred to
Show or continue CSI measurement instructions；The UE is measured according to the stopping CSI indicating or continues CSI measurement instructions, stops or continues
CSI is measured.
In such scheme, when deactivating SCell, eNB sends stopping CSI measurements to UE and indicates or continue that CSI is measured
Indicate, be specially：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB will be described by dedicated signaling
Stop CSI measurements and indicate or continue that CSI measurement instructions are sent to UE.
In such scheme, the stopping CSI being measured instruction or continue CSI measurements by the eNB by dedicated signaling to be referred to
Show and be sent to UE, be specially：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB sends to UE and carried
There are the stopping CSI measurements to indicate or continue the MAC CE or RRC signaling or PDCCH signalings of CSI measurement instructions.
Present invention also offers a kind of CSI measuring systems, the system includes：ENB and UE, wherein,
ENB, for before activation SCell, sending CSI measurements to UE and indicating；
UE, the CSI for being sent according to the eNB, which is measured, to be indicated, carries out CSI measurements.
In such scheme, the eNB is additionally operable to when deactivating SCell, and sending stopping CSI measurements to the UE refers to
Show or continue CSI measurement instructions；
The UE, be additionally operable to according to the eNB send stopping CSI measurement indicate or continue CSI measurement indicate, stop or
Continue CSI measurements.
The CSI measurement method and system of the present invention, before activation SCell, sends CSI measurements to UE from eNB and indicates, make
Instruction can be measured according to the CSI by obtaining UE, started CSI in time and measured and obtain accurate CSI measurement results, be ensure that and swashed
After SCell successes living, accurate CSI measurement results are reported eNB by UE, so that SCell can be obtained after activating successfully
To accurate scheduling, be conducive to improving wireless resource utility efficiency and cell throughout, particularly with activation SCell numbers compared with
Many or activation/deactivation operates more frequently situation, there is more significant scheduling gains.
Brief description of the drawings
Fig. 1 is the activation/deactivation process schematic of SCell in the prior art；
Fig. 2 is the schematic diagram for carrying out CSI measurements after SCell is activated successfully in the prior art；
Fig. 3 is the implementation process figure of CSI measurement method of the present invention；
Fig. 4 is MAC CE form schematic diagrams in the prior art for activation/deactivation；
Fig. 5 is to increase the form schematic diagram of MAC CE after field in the MAC CE for activation/deactivation；
Fig. 6 is for indicating that UE stops or continued the MAC CE of SCell CSI measurements form schematic diagram；
Fig. 7 is the implementation process figure of CQI measurements in the embodiment of the present invention one；
Fig. 8 is the implementation process figure that the CQI of the embodiment of the present invention two is measured；
Fig. 9 is the implementation process figure that the CQI of the embodiment of the present invention three is measured.
Embodiment
The present invention basic thought be：ENB sends CSI measurements before activation SCell, to UE and indicates that UE receives institute
State after CSI measurement instructions, measured and indicated according to the CSI, CSI measurements are carried out, in this way, UE just can be activated successfully in SCell
When, accurate CSI measurement results are obtained, and report eNB in time so that SCell can be adjusted accurately after activating successfully
Degree.
The CSI measurement method of the present invention, shown in reference picture 3, is mainly included the following steps that：
Step 101：Before activation SCell, eNB sends CSI measurements to UE and indicated；
Here, the CSI can include the one or more in CQI, PMI, RI.
Step 102：The UE is measured according to the CSI and indicated, carries out CSI measurements.
Specifically, before activation SCell, eNB sends CSI measurements to UE and indicates that the UE refers to according to the CSI measurements
Show, carry out the process of CSI measurements, can be realized by following five kinds of modes：
Mode one：Before activation SCell, eNB sends CSI measurements to UE and indicated, and is specified in CSI measurements are indicated
Start the subframe position of CSI measurements；UE is received after the CSI measurements instruction, reaches what is specified during the CSI measurements are indicated
When starting the subframe position of CSI measurements, start CSI measurements.
Mode two：Before activation SCell, eNB sends CSI measurements to UE and indicated, and is specified in CSI measurements are indicated
The subframe position of CSI measurement results is reported, UE is received after the CSI measurements instruction, specified in being indicated according to CSI measurements
The subframe position for reporting CSI measurement results, it is determined that start CSI measurement subframe position, and reach determined by start CSI
During the subframe position of measurement, start CSI measurements.
Mode three：Before activation SCell, eNB sends CSI measurements to UE and indicated, and is indicated in CSI measurements are indicated
Start the subframe position of CSI measurements and send the time offset between the subframe position that CSI measurements are indicated, UE is received
After the CSI measurements are indicated, the time offset indicated in indicating is measured according to the CSI and the CSI measurements are received
The subframe position of instruction, it is determined that starting the subframe position of CSI measurements, and reaches the identified subframe position for starting CSI measurements
When putting, start CSI measurements.
Mode four：Before activation SCell, eNB sends CSI measurements to UE and indicated, and is indicated in CSI measurements are indicated
Subframe position and send the time offset between the subframe position that CSI measurements are indicated that CSI is measured are reported, UE is received
After the CSI measurements are indicated, the time offset indicated in indicating is measured according to the CSI and the CSI measurements are received
The subframe position of instruction, it is determined that the subframe position that CSI is measured is reported, further according to the identified subframe position for reporting CSI to measure,
It is determined that starting the subframe position of CSI measurements, and when reaching the subframe position of identified beginning CSI measurements, start CSI and survey
Amount.
Mode five：In advance time signal machine in beginning opportunity or CSI measurement results is measured in UE configurations CSI；Activation SCell it
Before, eNB sends CSI measurements to UE and indicated, UE is received after the CSI measurements instruction, is started according to the CSI measurements being pre-configured with
Time signal machine on opportunity or CSI measurement results, it is determined that starting the subframe position of CSI measurements, and reaches identified subframe position
When start CSI measurement.
Here, can be in the UE processes for configuring time signal machine on CSI measurement beginning opportunitys or CSI measurement results in advance：
The CSI is measured time signal machine on beginning opportunity or CSI measurement results beforehand through RRC signaling and is sent to the UE, UE by eNB
Receive and preserved in the CSI measurement beginning opportunitys or CSI measurement results after time signal machine.
Wherein, CSI measurement beginning opportunitys can be specifically to indicate that UE carries out CSI measurements beginning during periodicity CSI measurements
Periodic quantity；Time signal machine can be specifically to indicate that CSI measurement results are reported when UE carries out periodicity CSI measurements in CSI measurement results
Periodic quantity.
Here, the subframe position of above-mentioned beginning CSI measurements, the subframe position for reporting CSI measurement results, beginning CSI are surveyed
The subframe position of amount and send the CSI measurement indicate subframe position between time offset, report CSI measure subframe position
Put and send time offset between the subframe position that CSI measurements are indicated, CSI measurement beginning opportunitys, in CSI measurement results
Time signal machine, receives sequential to determine, detailed process is prior art by eNB according to the dispatching algorithm of itself and transmission,
This is repeated no more.
Wherein, in step 101, before activation SCell, eNB sends CSI measurements to UE and indicated, is specially：Sent out to UE
Send before the MAC CE for activating SCell, CSI measurement instructions are sent to UE by eNB by dedicated signaling.
Specifically, configure to the subframe of UE transmission CSI measurement instructions in eNB in advance and send described for activating to UE
Time interval between SCell MAC CE subframe, eNB is used for the MAC CE's for activating SCell according to being sent to UE
Subframe position and the time interval being pre-configured with, it is determined that to UE send CSI measurement indicate subframe position, and to
Up to when determining that sending CSI to UE measures the subframe position indicated, sent to UE and carry the dedicated signaling that CSI measurements are indicated.
Here, it is described to send the subframe of CSI measurement instructions, with sending the MAC for being used to activate SCell to UE to UE
Time interval between CE subframe is general to require not less than one reference time nCQI_ref, to ensure when activating SCell,
UE can obtain accurate CSI measurement results and report eNB, in existing standard criterion, reference time nCQI_refFor
4ms, then it is 4ms that can set the time interval in the enb.Furthermore it is also possible to according to UE actual treatment ability and carry
The processing delay for the dedicated signaling that the CSI measurements are indicated, suitably to adjust set time interval.
Here, before the MAC CE for activating SCell are sent to UE, eNB is measured the CSI by dedicated signaling
Instruction is sent to UE, is specifically as follows：Before the MAC CE for activating SCell are sent to UE, eNB sends to UE and carried
The MAC CE that the CSI measurements are indicated.
Wherein, the cell index field for including SCell to be activated in the MAC CE that the CSI measurements are indicated is carried
(CIF, Cell Index Field) and for representing the field that the CSI measurements are indicated.
Specifically, 1 bit corresponds to SCell CIF in MAC CE bitmaps, and CIF can uniquely represent one
SCell。
It is used for the MAC CE forms of activation/deactivation in the prior art, as shown in figure 4, MAC CE include MAC subheaders (MAC
Sub header) and MAC payloads (payload), wherein, MAC subheaders include 8 bits, and two " R " are respectively 1 bit, to protect
Write down characters section, value is 0, " E " is 1 bit, is extended field, represent whether MAC header also has more multi-field；" LCID " is 5 bits,
For logical channel identity field, Medium Access Control (MAC) Protocol Data Unit (PDU, Protocol Data Unit) or MAC CE type are represented；
The form of MAC payloads is " C7/C6/C5/C4/C3/C2/C1/ R ", each field takes 1 bit totally 1 byte respectively, wherein " C7~
C1" it is used to represent UE each SCell cell index, value represents to activate the SCell corresponding to the cell index, value for 1
Represent to deactivate the SCell corresponding to the cell index for 0, " R " is reserved field, and value is 0.
In the present invention, include SCell to be activated CIF and for representing the field that the CSI measurements are indicated
MAC CE forms are identical with Fig. 4, except that：The value of " LCID " is different in MAC subheaders, represents that current MAC CE are used to refer to
Show that CSI is measured；In MAC CE payloads, " C7~C1 " represents each SCell cell index for representing UE, and value is that 1 expression is worked as
Preceding CSI measures the SCell corresponding to the cell index, and value is corresponding to the current CSI measurements of 0 expression and the cell index
SCell it is unrelated.
Or, " R " field in MAC CE payloads can also be redefined, for example, " R " in MAC CE payloads can be defined
Field, represents to start current CSI measurements when value is 1 or reports CSI measurement results, value is that 0 expression does not start current CSI
Measurement does not report CSI measurement results, here, redefines " R " field in MAC CE payloads for SCell lifes all UE
Effect.
Here, eNB can configure following information in UE in advance：When receiving CSI measurement instructions i.e. in current son
Frame starts CSI measurements；Or n-th of subframe after the subframe when receiving CSI measurement instructions starts CSI measurements or reported
CSI measurement results, here, n are positive integer, and by eNB, configuration or eNB are specified in the MAC CE in UE in advance so that UE
After the MAC CE are received, CSI measurements can be started according to specified subframe position or CSI measurement knots are reported
Really.
Here, eNB can be by increasing the message bit pattern for indicating number of sub-frames, by described in the MAC CE
MAC CE indicate that n-th subframes of the UE after the MAC CE are received starts CSI measurements or report CSI measurement results.
Here, before the MAC CE for activating SCell are sent to UE, eNB is measured the CSI by dedicated signaling
Instruction is sent to UE, can also be：Before the MAC CE for activating SCell are sent to UE, eNB sends to UE and carried
State the RRC signaling that CSI measurements are indicated.
Specifically, increase a cell in existing RRC signaling, the cell include CSI measurement indicate and
SCell to be activated CIF.Here, the RRC signaling can be wireless resource control connection reconfiguration (RRC Connection
Reconfiguration) signaling or newly-increased RRC signaling.
Or, a cell can also be increased in existing RRC signaling, the cell can only include the CSI and survey
Amount instruction, in this way, can represent that current CSI measurements are directed to all SCell of UE.
Here, before the MAC CE for activating SCell are sent to UE, eNB is measured the CSI by dedicated signaling
Instruction is sent to UE, can also be：Before the MAC CE for activating SCell are sent to UE, eNB sends to UE and carried
State the PDCCH signalings that CSI measurements are indicated.
Specifically, can increase a field in PDCCH signalings, the field include the CSI measurements indicate and
SCell to be activated CIF.Here, the RRC signaling can be wireless resource control connection reconfiguration (RRC Connection
Reconfiguration) signaling or newly-increased RRC signaling.
Or, a field can be increased in PDCCH signalings, the field can only include the CSI measurements and indicate,
In this way, can represent that current CSI measurements are directed to all SCell of UE.
In practical application, eNB can be by the PCell or any SCell being active of the UE, will be described
Include SCell to be activated CIF and for representing the MAC CE for the field that the CSI measurements are indicated or carrying
CSI measurement indicate RRC signaling or carry CSI measurement indicate PDCCH signalings be sent to the UE.
Here, in a step 102, it can also include：The supervision timer of a CSI measurement is pre-set, in the UE
Start after CSI measurements, start the supervision timer, after supervision timer time-out, the UE does not receive described
MAC CE or SCell for activating SCell activate failure, then stop the CSI measurements or report.
Wherein, the duration of the supervision timer can be set according to actual needs, specifically can be according to UE reality
Disposal ability is determined.
In addition, the method for the present invention can also include：When deactivating SCell, eNB sends stopping CSI measurements to UE and referred to
Show or continue CSI measurement instructions；The UE is measured according to the stopping CSI indicating or continues CSI measurement instructions, stops or continues
CSI is measured.
Specifically, when deactivating SCell, eNB sends stopping CSI measurements to UE and indicates or continue CSI measurement instructions, tool
Body is：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB is by dedicated signaling by the stopping CSI
Measurement indicates or continued that CSI measurement instructions are sent to UE.
Here, the stopping CSI being measured instruction or continue CSI measurement instructions by eNB by dedicated signaling is sent to UE, can
Think：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB sends to UE and carries the stopping CSI
Measurement indicates or continued the MAC CE that CSI measurements are indicated.
Wherein it is possible to it is described for deactivate SCell MAC CE in increase field, the increased field of institute is comprising treating
Activate SCell CIF and for representing that the stopping CSI measurements indicate or continued that CSI measurements are indicated, afterwards, used described
UE is sent in the MAC CE for deactivating SCell, in this way, while SCell is deactivated, also performing for the SCell's
The stopping of CSI measurements continues to operate.
Or, can also be by a single MAC CE, to indicate that UE is performed for stopping that the CSI of the SCell is measured
Only or continue operate.Specifically, by redefining the implication of field " R " in MAC CE, obtain carrying the stopping CSI surveys
Amount instruction continues the MAC CE that CSI measurements are indicated, then by resulting MAC CE and the MAC for being used to deactivate SCell
CE multiplexings are sent in a MAC PDU, or resulting MAC CE are being sent into the MAC CE for being used to deactivate SCell
Send afterwards, or resulting MAC CE are sent simultaneously with the MAC CE for being used to deactivate SCell.
In practical application, the process of field, Ke Yishi are increased in the MAC CE for being used to deactivate SCell：Reference
Shown in Fig. 5, increase multiple fields in original MAC CE, represent that corresponding SCell continues or stopped CSI after deactivation respectively
Measurement, for example, 1 Byte, " C ' can be increased in original MAC CE MAC payloads7/C’6/C’5/C’4/C’3/C’2/C’1/
The information of R ' " totally 8 bits, each bit is a field, and each field includes SCell cell index, each field
Value represent to continue or stop CSI measurements, represent to continue correspondence SCell CSI measurements for example, value is " 1 ", value is
" 0 " represents to stop correspondence SCell CSI measurements.After one is deactivated, if now including the cell rope of the SCell
The field value drawn is " 1 ", then continues the CSI measurements of the SCell, if " 0 ", then stops the CSI measurements of the SCell.
In practical application, pass through a single MAC CE, during indicating that UE stops or continued SCell CSI measurements, ginseng
According to shown in Fig. 6, the form of the MAC CE is identical with existing MAC CE forms, except that, redefine its MAC subheader or
" R " bit in MAC payloads, " R " represents to continue or stop CSI measurements after deactivation for all SCell.For example, definition
The implication of " R " bit of MAC subheaders is " any one SCell continues or stopped CSI measurements after deactivation ", and value is " 1 "
Represent to continue, value is that " 0 " represents to stop.After any one or more SCell are deactivated, if the field value is " 1 ",
Then continue the CSI measurements of the SCell, if value is " 0 ", stop the CSI measurements of the SCell.
Here, the stopping CSI being measured instruction or continue CSI measurement instructions by eNB by dedicated signaling is sent to UE, also
Can be：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB sends to UE and carries the stopping
CSI measurements indicate or continued the RRC signaling that CSI measurements are indicated.
Specifically, by increasing a cell in existing RRC signaling, the cell represents that the stopping CSI measurements refer to
Show or continue CSI measurement instructions.Represent to continue for TRUE or 1 for example, the cell value can be defined, value is FALSE or 0 table
Show stopping.Furthermore it is also possible to include SCell CIF in cell, it is easy to set corresponding instruction respectively for each SCell
Information.If the CIF not comprising SCell, the cell can be directed to the SCell of all SCell or all deactivation status.
Here, the RRC signaling can be pre-configured with or dynamic is sent, and the RRC signaling can be wireless heterogeneous networks connection weight
Configure (RRC Connection Reconfiguration) signaling or newly-increased RRC signaling.
Here, the stopping CSI being measured instruction or continue CSI measurement instructions by eNB by dedicated signaling is sent to UE, also
Can be：After the MAC CE for deactivating SCell are sent to UE or simultaneously, eNB sends to UE and carries the stopping
CSI measurements indicate or continued the PDCCH signalings that CSI measurements are indicated.
Specifically, by increasing a field in PDCCH signalings, the field represent stoppings CSI measurement instruction or
Continue CSI measurements to indicate.SCell CIF can also be included in the field, be easy to set corresponding for each SCell
PDCCH signalings, to indicate the continuation or stopping of CSI measurements.If the CIF not comprising SCell, the PDCCH signalings can be with pin
To the SCell of all SCell or all deactivation status.
Accordingly, present invention also offers a kind of CSI measuring systems, the system mainly includes：ENB and UE, wherein,
ENB, for before activation SCell, sending CSI measurements to UE and indicating；UE, for being referred to according to the eNB CSI measurements sent
Show, carry out CSI measurements.
Wherein, the eNB is additionally operable to when deactivating SCell, is sent to the UE and is stopped CSI measurements instruction or continue
CSI measurements are indicated；The UE, the stopping CSI measurements for being additionally operable to be sent according to the eNB indicate or continued that CSI measurements are indicated, stop
Only or continue CSI measurement.
Embodiment one
In the present embodiment, UE is configured with PCell, SCell_1, SCell_2, wherein, SCell_1 is active,
SCell_2 is in deactivation status, carries out SCell_2 CQI measurements, as shown in fig. 7, implementing flow includes following step
Suddenly：
Step 201：ENB carries CQI measurements to UE transmissions before activation SCell_2 is prepared, in subframe n-4 and starts finger
The MAC CE shown；
Here, eNB can also earlier than subframe n-4 subframe send carry CQI measurements start instruction MAC CE to
UE。
Here, eNB can indicate that the subframe that SCell_2 CQI is reported is n+8 in MAC CE, then in step 204, UE
Can be according to the subframe position n+8 for reporting CQI measurement, it is determined that needing to start SCell_2 CQI measurements in subframe n+2.
Here, eNB can also start to be indicated to UE by carrying CQI measurements in RRC signaling.In practical application, due to UE
Processing delay for RRC signaling can be more than MAC CE, and the subframe for sending RRC signaling will be earlier than subframe n-4.
Here, it is contemplated that eNB receives and decoded the processing delay needed for CQI measurement, eNB, which is sent, carries CQI surveys
The opportunity that amount starts the MAC CE indicated may more shift to an earlier date, such as in subframe n-8.
Step 202：ENB sends the MAC CE for activating SCell_2 in subframe n.
Step 203：UE carries the MAC CE successes that CQI measurements start to indicate described in being decoded in subframe n-1, in subframe n+
2 demultiplex MAC CE successes.
Here, UE is relevant with UE disposal ability to the MAC CE successfully decodeds received or demultiplexing successful time,
Subframe n-1 and n+2 be by way of example only herein, it is also possible to slightly before or be later than subframe n-1 and subframe n+2.
Step 204：UE starts SCell_2 CQI measurements in subframe n+2, and accurate CQI measurements knot is obtained in subframe n+4
Really, resulting CQI measurement is reported to eNB in subframe n+8.
Here, UE measures the time that accurate CQI measurement is consumed that obtains from CQI is started, the actual place with UE
Reason ability is relevant, and the UE in the present embodiment is from starting CQI and measure to obtain accurate CQI measurement and consume 2 subframes
Time, from accurate CQI measurement is obtained to reporting the CQI measurement, in addition it is also necessary to by a reference time n-
nCQI_ref, according to existing standard, reference time n-nCQI_refFor 4ms, that is, 4 subframes.
Step 205：UE receives the MAC CE for activating SCell_2 in subframe n, and MAC CE successes are decoded in n+3,
The MAC CE are demultiplexed successfully in subframe n+6.
Here, UE is decoded and demultiplexed the consumed time to MAC CE, is had with the disposal abilities of UE in itself
Close.
Step 206：ENB receives the CQI measurement that UE is reported in subframe n+8, and is measured according to received CQI
As a result, start to dispatch SCell_2.
Step 207：UE carries out CQI measurements according to the sequential being pre-configured with, periodically and by obtained CQI measurement
Report eNB.
In the present embodiment, it can also include in step 203：UE starts supervision timer T simultaneously in subframe n+2, if
After supervision timer T time-out, UE is also not received by the MAC CE for being used to activate SCell_2 of eNB transmissions, or in step
The CQI measurements of 205 any operation failure, then UE stopping SCell_2 after supervision timer T time-out.
The present embodiment is equally applicable to PMI/RI measurements.
Embodiment two
In the present embodiment, UE is configured with PCell, SCell_1, SCell_2, wherein, SCell_1 and SCell_2 are in
State of activation, carries out the process of CQI measurements, comprises the following steps as shown in figure 8, implementing flow：
Step 301：ENB beforehand through RRC signaling in advance on UE configure SCell_1 stops after deactivation CQI measure,
SCell_2 continues CQI measurements after deactivation.
Step 302：ENB is SCell_1 and SCell_2 configuration cycle property CQI measurement reports beforehand through RRC signaling.
Step 303：ENB sends the MAC CE for deactivating SCell_1 and SCell_2 in subframe n, deactivates SCell_
1 and SCell_2.
Step 304：UE receives the MAC CE for deactivating SCell_1 and SCell_2 in subframe n, is decoded into n+3
Work(, demultiplexes successfully in subframe n+6, SCell_1 and SCell_2 successes is deactivated in subframe n+8.
Step 305：UE subframes n+8 stops SCell_1 CQI measurements, according to the sequential being pre-configured with, continues SCell_2
CQI measurement.
Step 306：After a period of time, eNB precise activation SCell_1 send in subframe n+32 and carry CQI measurement instructions
MAC CE to UE, start CQI measurements in SCell_1, UE obtains accurate CQI measurement in subframe n+40.
Step 307：ENB sends the MAC CE for activating SCell_1 in subframe n+36；
Step 308：UE reports accurate CQI measurement in subframe n+44 to eNB, and UE activates SCell_ in subframe n+44
1 success.
Here, step 301 and step 302 can use same RRC signaling to be configured, and such as RRC connections reconfigure letter
Order.
Here, if after a period of time, eNB needs to activate SCell_2, it may not be necessary to before activation SCell_2,
CQI measurements are sent to UE to start to indicate, because after SCell_2 deactivations, SCell_2 CQI measurements are still continuing.
The present embodiment is equally applicable to PMI/RI measurements.
Embodiment three
UE is configured with PCell, SCell_1, SCell_2, wherein, SCell_1 and SCell_2 are in state of activation, enter
The process of row CQI measurements, comprises the following steps as shown in figure 9, implementing flow：
Step 401：ENB is SCell_1 and SCell_2 configuration cycle property CQI measurement reports beforehand through RRC signaling.
Step 402：ENB sends the MAC CE for deactivating SCell_1 and SCell_2 in subframe n, deactivates SCell_
1 and SCell_2.
Step 403：ENB is sent in subframe n to be reported for instruction stopping SCell_1 CQI measurement, continues SCell_
The MAC CE that 2 CQI measurement is reported.
Step 404：UE receives the MAC CE for deactivating SCell_1 and SCell_2 in subframe n, is gone in subframe n+8
Activate SCell_1 and SCell_2 successes.
Step 405：UE is received in subframe n to be reported for instruction stopping SCell_1 CQI measurement, continues
The MAC CE that SCell_2 CQI measurement is reported, demultiplex MAC CE successes, and perform corresponding behaviour in subframe n+6
Make.
Step 406：After a period of time, eNB prepares activation SCell_1, is sent in subframe n+32 and carries CQI measurement instructions
MAC CE, start CQI measurements in SCell_1, UE obtains accurate SCell_1 CQI measurement in subframe n+44.
Step 407：ENB sends in subframe n+36 and activated for activating SCell_1 MAC CE, UE in subframe n+44
SCell_1 successes, and SCell_1 CQI measurement is reported to eNB.
The present embodiment is equally applicable to PMI/RI measurements.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (14)
1. a kind of channel status indicates (CSI) measuring method, it is characterised in that methods described includes：
Before activation time serving cell (SCell), base station (eNB) sends CSI measurements to user equipment (UE) and indicated；
The UE is measured according to the CSI and indicated, carries out CSI measurements；
Wherein, the UE is measured according to the CSI and indicated, carrying out CSI measurements includes：The UE receives the CSI measurements and referred to
After showing, instruction determination is measured according to the CSI and starts the subframe position that CSI is measured, reach identified beginning CSI measurements
During the subframe position, start the CSI measurements.
2. CSI measurement method according to claim 1, it is characterised in that described before activation SCell, eNB is sent to UE
CSI measurements are indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements, is specially：
Before activation SCell, eNB sends CSI to UE and measures instruction, and specifies beginning CSI to measure in CSI measurements are indicated
Subframe position；UE is received after the CSI measurements instruction, the beginning CSI measurements specified in the CSI measurements instruction is reached
Subframe position when, start CSI measurement.
3. CSI measurement method according to claim 1, it is characterised in that described before activation SCell, eNB is sent to UE
CSI measurements are indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements, is specially：
Activation SCell before, eNB to UE send CSI measurement indicate, and the CSI measurement indicate in specify report CSI to measure
As a result subframe position, UE is received after the CSI measurements instruction, and that is specified in being indicated according to CSI measurements reports CSI to survey
The subframe position of result is measured, it is determined that starting the subframe position of CSI measurements, and the identified subframe for starting CSI measurements is reached
During position, start CSI measurements.
4. CSI measurement method according to claim 1, it is characterised in that described before activation SCell, eNB is sent to UE
CSI measurements are indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements, is specially：
Before activation SCell, eNB sends CSI measurement instructions to UE, and indicates that starting CSI measures in CSI measurements are indicated
Subframe position and send the time offset between the subframe position that CSI measurements are indicated, UE receives CSI measurement
After instruction, the time offset indicated in indicating is measured according to the CSI and the subframe that the CSI measures instruction is received
Position, it is determined that starting the subframe position of CSI measurements, and when reaching the subframe position of identified beginning CSI measurements, starts
CSI is measured.
5. CSI measurement method according to claim 1, it is characterised in that described before activation SCell, eNB is sent to UE
CSI measurements are indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements, is specially：
Before activation SCell, eNB sends CSI measurements to UE and indicated, and indicates to report CSI to measure in CSI measurements are indicated
Subframe position and send the CSI measurement indicate subframe position between time offset；
UE is received after the CSI measurements instruction, and the time offset indicated in indicating is measured according to the CSI and is received
The subframe position indicated is measured to the CSI, it is determined that the subframe position for reporting CSI to measure, reports CSI to survey further according to identified
The subframe position of amount, it is determined that starting the subframe position of CSI measurements, and reaches the identified subframe position for starting CSI measurements
When, start CSI measurements.
6. CSI measurement method according to claim 1, it is characterised in that described before activation SCell, eNB is sent to UE
CSI measurements are indicated；The UE is measured according to the CSI and indicated, carries out CSI measurements, is specially：
In advance time signal machine in beginning opportunity or CSI measurement results is measured in UE configurations CSI；Before activation SCell, eNB is to UE
Send CSI measurements to indicate, UE is received after the CSI measurements instruction, and beginning opportunity or CSI are measured according to the CSI being pre-configured with
Time signal machine in measurement result, it is determined that starting the subframe position of CSI measurements, and starts CSI when reaching identified subframe position
Measurement.
7. according to any one of claim 1 to 6 CSI measurement method, it is characterised in that before activation SCell, eNB to
UE sends CSI measurements and indicated, is specially：
Before the media access control layer control unit (MAC CE) for activating SCell is sent to UE, eNB passes through special letter
CSI measurement instructions are sent to UE by order.
8. CSI measurement method according to claim 7, it is characterised in that the eNB is surveyed the CSI by dedicated signaling
Amount instruction is sent to UE, is specially：
Before the MAC CE for activating SCell are sent to UE, the eNB carries the CSI measurements to the transmission and referred to
MAC CE or radio resource control layer (RRC) signaling or Physical Downlink Control Channel (PDCCH) signaling shown.
9. CSI measurement method according to claim 7, it is characterised in that measured and indicated according to the CSI in the UE,
Carry out in CSI measurements, in addition to：
The supervision timer of a CSI measurement is pre-set, after the UE starts CSI measurements, starts the monitoring timing
Device, after supervision timer time-out, the UE does not receive MAC CE or the SCell activation for being used to activate SCell
Failure, then stop the CSI measurements or report.
10. CSI measurement method according to claim 1, it is characterised in that methods described also includes：
When deactivating SCell, eNB sends stopping CSI measurements to UE and indicates or continue CSI measurement instructions；
The UE is measured according to the stopping CSI indicating or continues CSI measurement instructions, stops or continue CSI measurements.
11. CSI measurement method according to claim 10, it is characterised in that when deactivating SCell, eNB is sent to UE to stop
Only CSI measurements indicate or continued that CSI measurements are indicated, are specially：After the MAC CE for deactivating SCell are sent to UE or
Meanwhile, the stopping CSI being measured instruction or continue CSI measurement instructions by eNB by dedicated signaling is sent to UE.
12. CSI measurement method according to claim 10, it is characterised in that the eNB is stopped by dedicated signaling by described
CSI measurements indicate or continued that CSI measurement instructions are sent to UE, are specially：The MAC CE for deactivating SCell are being sent to UE
Afterwards or simultaneously, eNB sent to UE carry stoppings CSI measurement indicate or continue CSI measurement instructions MAC CE or
RRC signaling or PDCCH signalings.
13. a kind of CSI measuring systems, it is characterised in that the system includes：ENB and UE, wherein,
ENB, for before activation SCell, sending CSI measurements to UE and indicating；
UE, the CSI for being sent according to the eNB, which is measured, to be indicated, carries out CSI measurements；
Wherein, the UE is measured according to the CSI and indicated, carrying out CSI measurements includes：The UE receives the CSI measurements and referred to
After showing, instruction determination is measured according to the CSI and starts the subframe position that CSI is measured, reach identified beginning CSI measurements
During the subframe position, start the CSI measurements.
14. CSI measuring systems according to claim 13, it is characterised in that
The eNB, is additionally operable to when deactivating SCell, and sending stopping CSI measurements to the UE indicates or continue that CSI measurements refer to
Show；
The UE, the stopping CSI measurements for being additionally operable to be sent according to the eNB indicate or continued that CSI measurements are indicated, stop or continue
CSI is measured.
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