CN103491523A - CSI-RS information providing method and communication terminal - Google Patents
CSI-RS information providing method and communication terminal Download PDFInfo
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- CN103491523A CN103491523A CN201210190559.6A CN201210190559A CN103491523A CN 103491523 A CN103491523 A CN 103491523A CN 201210190559 A CN201210190559 A CN 201210190559A CN 103491523 A CN103491523 A CN 103491523A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/008—Timing of allocation once only, on installation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
Abstract
The embodiment of the invention discloses a CSI-RS information providing method and a communication terminal. The communication terminal maintains configuration information of at least one channel state information reference signal (CSI-RS) in an idle state; and the communication terminal sends CSI-RS information corresponding to the configuration information of the at least CSI-RS to a service base station when recovering from the idle state to a connection state. By adopting the CSI-RS information providing method and the communication terminal, communication delay can be reduced, and the quality of communication can be improved.
Description
Technical field
The present invention relates to wireless communication field, a kind of method of the CSI-RS of providing information and the method that communication terminal provides CSI-RS information are provided.
Background technology
Coordinate multipoint (Coordinated multi-point, CoMP) transmission refers to a plurality of transfer points of separating on geographical position, the collaborative participation to a subscriber equipment (User Equipment, UE) send data or combine the data that receive a UE transmission, a plurality of transfer points that participate in cooperation are often referred to the base station of different districts, and UE is communication terminal namely.The CoMP technology is covering performance in order to improve edge customer and throughput and a kind of technology of producing, special at subscriber equipment in cell edge, UE is placed on the same frequency of a plurality of base stations, several base stations are served for this UE simultaneously.Adopting CoMP can reduce presence of intercell interference, is mainly the spectrum efficiency that can promote Cell Edge User.
The CoMP set is to carry out the set of a plurality of transfer points of CoMP transmission with UE, for described UE, each transfer point sends different separately channel state information reference signals (Channel State Information Reference Signal usually, CSI-RS) mutually distinguish, so that UE carries out channel estimating to the link between own and this transfer point.Particularly, as UE during in connected state, the configuration information of CSI-RS corresponding at least one transfer point is understood regularly or provided to this UE under certain conditions to serving BS, CSI-RS is safeguarded and measured with the form of CoMP set by UE, and corresponding CSI-RS information is returned to serving BS, at least one transfer point of CSI-RS Information Selection and the UE that make serving BS to return according to UE carry out the CoMP transmission.
But, in existing CoMP transmission plan, when UE is restored to connected state from Idle state, can not to serving BS, provide CSI-RS information to carry out the CoMP transmission immediately, and must again receive from serving BS the CSI-RS configuration information of at least one transfer point, then just can carry out the CoMP transmission, can cause transmission delay like this, affect the user and experience.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of method and communication terminal of the CSI-RS of providing information is provided, and can reduce transmission delay, promotes the user and experiences.
In order to solve the problems of the technologies described above, on the one hand, a kind of method of the CSI-RS of providing information is provided the embodiment of the present invention, comprising:
Safeguard the configuration information of at least one channel state information reference signals CSI-RS when Idle state;
When from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
On the other hand, a kind of method of the CSI-RS of providing information also is provided the embodiment of the present invention, comprising:
Configuration information based at least one channel state information reference signals CSI-RS when Idle state is measured to obtain measurement result;
When from Idle state, reverting to connected state, described measurement result is sent to serving BS.
On the other hand, the embodiment of the present invention also provides a kind of communication terminal, comprising:
The Idle state maintenance module, for safeguarding the configuration information fruit of at least one channel state information reference signals CSI-RS when the Idle state;
Sending module, for when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
On the other hand, the embodiment of the present invention also provides a kind of communication terminal, comprising:
The Idle state measurement module, measured to obtain measurement result for the configuration information based at least one CSI-RS when the Idle state;
Sending module, for when from Idle state, reverting to connected state, send to serving BS by described measurement result.
Implement the embodiment of the present invention, there is following beneficial effect: by safeguarding the configuration information of CSI-RS and/or the configuration information of CSI-RS is measured when the Idle state, and by the configuration information of CSI-RS, corresponding CSI-RS information is uploaded to serving BS when by Idle state, being converted to connected state, can make serving BS select fast transfer point to carry out cooperative multipoint transmission, because communication terminal is not known the communication delay that the configuration information of CSI-RS causes, improved communication quality while having reduced communication connection.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the first embodiment flow chart that the method for CSI-RS information is provided in the present invention;
Fig. 2 is the second embodiment flow chart that the method for CSI-RS information is provided in the present invention;
Fig. 3 is the 3rd embodiment flow chart that the method for CSI-RS information is provided in the present invention;
Fig. 4 is the 4th embodiment flow chart that the method for CSI-RS information is provided in the present invention;
Fig. 5 is the 5th embodiment flow chart that the method for CSI-RS information is provided in the present invention;
Fig. 6 is the first example structure schematic diagram of communication terminal in the present invention;
Fig. 7 is the second example structure schematic diagram of communication terminal in the present invention;
Fig. 8 is the 3rd example structure schematic diagram of communication terminal in the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Referring to Fig. 1, is the first embodiment flow chart that the method for CSI-RS information is provided in the present invention, and the method comprises:
S100, safeguard the configuration information of at least one CSI-RS when Idle state.Wherein, a CSI-RS is for a corresponding transfer point, and all transfer points of terminal maintenance can be used as a CoMP set.The CoMP set can be CoMP cooperation (CoMP cooperating set), CoMP measuring set (CoMP measurement set) or resource management collection (resource management set, RM set).The CoMP cooperation is to participate in directly or indirectly the set in the transfer point of a time/frequency source block transmitting data to a terminal, wherein, directly participate in transfer of data refer to this transfer point really for this terminal at this time/frequency source block transmitting data, indirectly participate in transfer of data refer to this transfer point in fact not for this terminal at this time/frequency source block transmitting data, but for how determining on this time/frequency source block, scheduling/beam forming of user is contributed.Transfer point in the CoMP measuring set is measured the channel quality of this transfer point and terminal links for terminal.The concentrated transfer point of resource management is used for this transfer point and terminal links are carried out to measurement, extra RRM (RRM, Radio Resource Management) method of measurement may be also the different transfer points of how distinguishing in same community, or how from this RRM set, to select the CoMP measuring set.The configuration information of CSI-RS comprise running time-frequency resource configuration that CSI-RS sequence, CSI-RS send, transmission cycle, CSI-RS configuration identifier, CSI-RS configuration index number, send this CSI-RS antenna port, send the information such as antenna number that this CSI-RS uses, sub-frame configuration, CSI-RS resource.In addition, " Idle state " mentioned herein refers to communication terminal in the time of holding state.
S101, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.Particularly, can pass through physical layer signaling (L1 signaling), MAC (MediumAccess Control, media access control layer) layer signaling (L2 signaling), RRC (RadioResource Control, Radio Resource is controlled) signaling (L3 signaling) etc. send to serving BS by CSI-RS information.Wherein, CSI-RS information can be the configuration information of CSI-RS or CSI-RS sign (CSI-RS index) etc.After the CSI-RS information of serving BS obtaining communication terminal maintenance, the part or all of transfer point of safeguarding according to CSI-RS Information Selection communication terminal participate in directly or indirectly and communication terminal between CoMP transmission.In addition, " while from Idle state, returning to connected state " mentioned in this article both comprised when communication terminal reverts to connected state from Idle state, when also comprising that the communication terminal in Idle state accesses at random (the random access that such as upstream data arrival, downlink data arrival, Radio Link Failure etc. causes) or completing random access.
The method of CSI-RS information is provided in the embodiment of the present invention, by safeguarding the configuration information of CSI-RS when the Idle state, and by the configuration information of CSI-RS, corresponding CSI-RS information is uploaded to serving BS when by Idle state, being converted to connected state, can make serving BS select fast transfer point to carry out cooperative multipoint transmission, because communication terminal is not known the communication delay that the configuration information of CSI-RS causes, improved communication quality while having reduced communication connection.
Referring to Fig. 2, is the second embodiment flow chart that the method for CSI-RS information is provided in the present invention, and the method comprises:
S200, safeguard the configuration information of at least one CSI-RS when Idle state.
The configuration information of S201, at least one CSI-RS based on safeguarded is measured to obtain measurement result.Particularly, measurement result can be RSRP (Reference Signal Receiving Power, Reference Signal Received Power), RSRQ (Reference Signal Receiving Quality, Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio, signal to noise ratio), RSSI (Received Signal Strength Indication, received signal strength indicator), CQI (Channel Quality Indicator, CQI), PMI (Precoding Matrix Indicator, precoding matrix indicators), RI (Rank Indicator, the order designator) etc. measured value.Particularly, measurement result can be the overall measurement value of the subset of the overall measurement value of the measured value of each CSI-RS in the subset of the measured value of each CSI-RS in safeguarded CSI-RS or the CSI-RS that safeguards or the CSI-RS that safeguards or the CSI-RS that safeguards.For example, can all CSI-RS known to communication terminal be measured, also can be only wherein one or more subsets of the CSI-RS known to communication terminal be measured.Again for example, can be measured for single CSI-RS, be obtained respectively one or more in RSRP, RSRQ that each CSI-RS is corresponding, SINR, SNR, RSSI, CQI, the measured values such as PMI, RI.Also for example, can be measured for a plurality of CSI-RS, be obtained a total measurement result, one or more in measured values such as RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI.In addition, can periodically to CSI-RS, be measured, also can only be measured CSI-RS under certain condition.
S202, when from Idle state, reverting to connected state, described measurement result is sent to serving BS.After the measurement result that serving BS obtaining communication terminal is uploaded, according to measurement result select part or all of transfer point that communication terminal is safeguarded to participate in directly or indirectly and communication terminal between the CoMP transmission.In addition, " while from Idle state, returning to connected state " mentioned in this article both comprised when communication terminal reverts to connected state from Idle state, when also comprising that the communication terminal in Idle state accesses at random (the random access that such as upstream data arrival, downlink data arrival, Radio Link Failure etc. causes) or completing random access.
In step S100 and S200, the source of the configuration information of the CSI-RS in communication terminal has multiple, below with reference to Fig. 3-4, illustrates two kinds of embodiment wherein.
Referring to Fig. 3, is the 3rd embodiment flow chart that the method for CSI-RS information is provided in the present invention, and the method comprises:
S300, when connected state, receive and the configuration information of at least one CSI-RS of maintenance service base station configuration.
S301, enter Idle state after, continue to safeguard the configuration information of described at least one CSI-RS.
The configuration information of S302, at least one CSI-RS based on safeguarded is measured to obtain measurement result.
S303, when from Idle state, reverting to connected state, described measurement result is sent to serving BS.
Referring to Fig. 4, is the 4th embodiment flow chart that the method for CSI-RS information is provided in the present invention, and the method comprises:
S400, when Idle state, receive the broadcast from serving BS or neighbor base stations, the configuration information that comprises at least one CSI-RS in described base station broadcast message.
S401, safeguard the configuration information of described at least one CSI-RS in described broadcast.In the prior art, although communication terminal also can receive broadcast when Idle state, wherein do not comprise the configuration information of CSI-RS, that is to say, when Idle state, communication terminal can't obtain the configuration information of CSI-RS.
The configuration information of S402, at least one CSI-RS based on safeguarded is measured to obtain measurement result.
S403, when from Idle state, reverting to connected state, described measurement result is sent to serving BS.
Because broadcast is to upgrade in the cycle to send, communication terminal can repeatedly obtain the configuration information of CSI-RS when Idle state from the broadcast received, and the configuration information of safeguarded CSI-RS is carried out to real-time update.Therefore, in other embodiments of the invention, can be by the embodiment combination shown in Fig. 3 and Fig. 4, while when Idle state, continuing to safeguard connected state last time by the configuration information of at least one CSI-RS of serving BS configuration, and receive the configuration information of other CSI-RS and safeguarded by broadcast in real time, thereby the CoMP that real-time update is safeguarded set.
Referring to Fig. 5, is the 5th embodiment flow chart that the method for CSI-RS information is provided in the present invention, comprising:
S500, the configuration information based at least one channel state information reference signals CSI-RS when Idle state are measured to obtain measurement result.Particularly, measurement result can be the measured value of RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI etc.Wherein the configuration information of CSI-RS can be last time serving BS configuration during connected state, in the time of also can being Idle state, from the broadcast of serving BS or neighbor base stations, obtains.In the CSI-RS of measurement result known to can being the measured value of each CSI-RS or known to the subset of CSI-RS in each CSI-RS measured value known to CSI-RS the overall measurement value or known to the overall measurement value of a subset of CSI-RS.For example, can all CSI-RS known to communication terminal be measured, also can be only wherein one or more subsets of the CSI-RS known to communication terminal be measured.Again for example, can be measured for single CSI-RS, be obtained respectively one or more in RSRP, RSRQ that each CSI-RS is corresponding, SINR, SNR, RSSI, CQI, the measured values such as PMI, RI.Also for example, can be measured for a plurality of CSI-RS, be obtained a total measurement result, one or more in measured values such as RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI.Can periodically to CSI-RS, be measured, also can only be measured CSI-RS under certain condition.In addition, " Idle state " mentioned herein refers to communication terminal in the time of holding state.
S501, when from Idle state, reverting to connected state, described measurement result is sent to serving BS.After the measurement result that serving BS obtaining communication terminal is uploaded, according to measurement result select part or all of transfer point that communication terminal is safeguarded to participate in directly or indirectly and communication terminal between the CoMP transmission.In addition, " while from Idle state, returning to connected state " mentioned in this article both comprised when communication terminal reverts to connected state from Idle state, when also comprising that the communication terminal in Idle state accesses at random (the random access that such as upstream data arrival, downlink data arrival, Radio Link Failure etc. causes) or completing random access.In above cited embodiment, the step of safeguarding, measuring and send, can unconditionally carry out, and also can only carry out under certain condition.
For example, in step S100, S200, S301 or S401, only, in the Preset Time scope of Idle state, safeguard the configuration information of at least one CSI-RS; And/or, only, when the translational speed of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state; And/or, only, when the change in location of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state.
Again for example, in S200, S301, S401 or S500, only, in the Preset Time scope of Idle state, the configuration information based at least one CSI-RS is measured to obtain measurement result; And/or only, when the translational speed of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result; And/or only, when the change in location of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result.
In addition, because the measurement to CSI-RS may periodically be carried out, be that communication terminal can be updated periodically measurement result when Idle state, after S200, S301 or S401, can also comprise: when described measurement result is greater than predetermined threshold value, continue to safeguard the configuration information of described at least one CSI-RS when Idle state, and the configuration information of at least one CSI-RS based on safeguarded is measured to obtain up-to-date measurement result.Similarly, after S500, can also comprise: when described measurement result is greater than predetermined threshold value, the configuration information continued based at least one CSI-RS when Idle state is measured to obtain up-to-date measurement result.
Similarly, in step S101, S202, S303, S403 or S501, only, when the translational speed of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS; And/or only, when the change in location of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.Perhaps, in S202, S303, S403 or S501, when described measurement result is greater than predetermined threshold value, when from Idle state, reverting to connected state, the CSI-RS information (for example measurement result) that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
For example, for example, when communication terminal, during in Idle state, only in 30 minutes, safeguard the configuration information of CSI-RS; After 30 minutes, delete the configuration information of the CSI-RS safeguarded.Again for example, when communication terminal during in Idle state, for example, if the translational speed of communication terminal (, lower than 50km/h) in preset range continues to safeguard the configuration information of CSI-RS; For example, if the translational speed of communication terminal exceeds preset range (, higher than 50km/h), no longer safeguard the configuration information of described CSI-RS.Again for example, when communication terminal during in Idle state, for example, if the change in location of communication terminal (, the position when communication terminal of take has just been got back to Idle state is the center of circle, in the scope that radius is d) in preset range continues to safeguard the configuration information of CSI-RS; For example, if the change in location of communication terminal exceeds preset range (, the position when communication terminal of take has just been got back to Idle state is the center of circle, in the scope that radius is d), no longer safeguard the configuration information of described CSI-RS.Again for example, when communication terminal during in Idle state, if while for the measurement result of CSI-RS, being greater than default first threshold, continue to safeguard the configuration information of CSI-RS, and the configuration information that continues the CSI-RS based on safeguarded is measured to obtain up-to-date measurement result; If the measurement result of CSI-RS is not more than default first threshold, deletes the configuration information of the CSI-RS safeguarded, and no longer measured.Wherein, the measurement result of CSI-RS can be the overall measurement value of the subset of the overall measurement value of the measured value of each CSI-RS in the subset of the measured value of measured each CSI-RS or measured CSI-RS or measured all CSI-RS or measured CSI-RS.It will be appreciated by those skilled in the art that above these examples are equally applicable to measuring process and forwarding step.
Safeguard the configuration information of CSI-RS under certain condition, based on configuration information, measured under certain condition, and send CSI-RS information under certain condition to base station, in the time of can avoiding the configuration information of the CSI-RS that obtains when communication terminal useless, (for example communication terminal is when the fast moving state, because present position changes very fast, the COMP set that communication terminal is safeguarded when Idle state may and not be suitable for connected state) still useless CSI-RS configuration information is safeguarded, measure and send to base station useless CSI-RS information, affect the selecting properly of base station to transfer point, reduce communication quality.
Referring to Fig. 6, is the structural representation of communication terminal 600 in the present invention, and communication terminal 600 comprises:
Idle state maintenance module 610, for safeguarding the configuration information of at least one channel state information reference signals CSI-RS when the Idle state.Wherein, a CSI-RS is for a corresponding transfer point, and all transfer points of terminal maintenance can be used as a CoMP set.The configuration information of CSI-RS comprise running time-frequency resource configuration that CSI-RS sequence, CSI-RS send, transmission cycle, CSI-RS configuration identifier, CSI-RS configuration index number, send this CSI-RS antenna port, send the information such as antenna number that this CSI-RS uses, sub-frame configuration, CSI-RS resource.In addition, " Idle state " mentioned herein refers to communication terminal in the time of holding state.
Sending module 620, for when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS, makes described serving BS carry out cooperative multipoint transmission according to described at least one transfer point of CSI-RS Information Selection and communication terminal.Particularly, sending module 620 can pass through physical layer signaling (L1 signaling), MAC (Medium Access Control, media access control layer) layer signaling (L2 signaling), RRC (Radio Resource Control, Radio Resource is controlled) signaling (L3 signaling) etc. send to serving BS by CSI-RS information.Wherein, sending to the CSI-RS information of described serving BS is configuration information or the CSI-RS sign (CSI-RS index) of CSI-RS.After the CSI-RS information of serving BS obtaining communication terminal maintenance, the part or all of transfer point of safeguarding according to CSI-RS Information Selection communication terminal participate in directly or indirectly and communication terminal between CoMP transmission.In addition, " while from Idle state, returning to connected state " mentioned in this article both comprised when communication terminal reverts to connected state from Idle state, when also comprising that the communication terminal in Idle state accesses at random (the random access that such as upstream data arrival, downlink data arrival, Radio Link Failure etc. causes) or completing random access.
Communication terminal in the embodiment of the present invention, by safeguarding the configuration information of CSI-RS when the Idle state, and by the configuration information of CSI-RS, corresponding CSI-RS information is uploaded to serving BS when by Idle state, being converted to connected state, can make serving BS select fast transfer point to carry out cooperative multipoint transmission, because communication terminal is not known the communication delay that the configuration information of CSI-RS causes, improved communication quality while having reduced communication connection.
Referring to Fig. 6, is the structural representation of communication terminal 700 in the present invention.Except Idle state maintenance module 610 and sending module 620, communication terminal 700 also comprises:
Idle state measurement module 630, for when the Idle state, the configuration information of at least one CSI-RS safeguarded based on Idle state maintenance module 610 is measured to obtain measurement result.Particularly, measurement result can be the measured value of RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI etc.Particularly, measurement result can be the overall measurement value of the subset of the measured value of each CSI-RS in the subset of the measured value of each CSI-RS in the CSI-RS that safeguards of Idle state maintenance module 610 or the CSI-RS that Idle state maintenance module 610 is safeguarded or the overall measurement value of the CSI-RS that Idle state maintenance module 610 is safeguarded or the CSI-RS that Idle state maintenance module 610 is safeguarded.For example, Idle state measurement module 630 can be measured all CSI-RS known to communication terminal, also can be only wherein one or more subsets of the CSI-RS known to communication terminal be measured.Again for example, Idle state measurement module 630 can be measured for single CSI-RS, obtains respectively one or more in RSRP, RSRQ that each CSI-RS is corresponding, SINR, SNR, RSSI, CQI, the measured values such as PMI, RI.Also for example, Idle state measurement module 630 can be measured for a plurality of CSI-RS, obtains a total measurement result, one or more in measured values such as RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI.In addition, Idle state measurement module 630 can periodically be measured CSI-RS, also can only to CSI-RS, be measured under certain condition.
In this embodiment, sending module 620 comprises in the CSI-RS information that sends to serving BS when Idle state reverts to connected state the measurement result that Idle state measurement module 630 measures.
In above-described embodiment, the source of the configuration information of CSI-RS has multiple, for example, and the configuration information serving BS configuration of Idle state maintenance module 610 at least one CSI-RS of serving BS configuration when safeguarding connected state last time when the Idle state.
Again for example, communication terminal 600 or 700 also comprises the broadcast receiver module, for receiving the broadcast from serving BS or neighbor base stations when the Idle state, comprises the configuration information of at least one CSI-RS in described broadcast.Idle state maintenance module 610 is for the configuration information of described at least one CSI-RS of safeguarding described broadcast.
Because broadcast is to upgrade in the cycle to send, Idle state maintenance module 610 can repeatedly obtain the configuration information of CSI-RS when Idle state from the broadcast received, and the configuration information of safeguarded CSI-RS is carried out to real-time update.Therefore, in other embodiments of the invention, can be by these two kinds of mode combinations, it is Idle state maintenance module 610 configuration information by least one CSI-RS of serving BS configuration while safeguarding connected state last time when Idle state, and the configuration information that in real time by broadcast, receives other CSI-RS safeguarded, thus the CoMP that real-time update is safeguarded set.
Referring to Fig. 8, is the structural representation of communication terminal 800 in the present invention, and communication terminal 800 comprises:
Idle state measurement module 810, measured to obtain measurement result for the configuration information based at least one channel state information reference signals CSI-RS when the Idle state.Particularly, measurement result can be the measured value of RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI etc.Wherein the configuration information of CSI-RS can be last time serving BS configuration during connected state, in the time of also can being Idle state, from the broadcast of serving BS or neighbor base stations, obtains.In the CSI-RS of measurement result known to can being the measured value of each CSI-RS or known to the subset of CSI-RS in each CSI-RS measured value known to CSI-RS the overall measurement value or known to the overall measurement value of a subset of CSI-RS.For example, Idle state measurement module 810 can be measured all CSI-RS known to communication terminal, also can be only wherein one or more subsets of the CSI-RS known to communication terminal be measured.Again for example, Idle state measurement module 810 can be measured for single CSI-RS, obtains respectively one or more in RSRP, RSRQ that each CSI-RS is corresponding, SINR, SNR, RSSI, CQI, the measured values such as PMI, RI.Also for example, Idle state measurement module 810 can be measured for a plurality of CSI-RS, obtains a total measurement result, one or more in measured values such as RSRP, RSRQ, SINR, SNR, RSSI, CQI, PMI, RI.Idle state measurement module 810 can periodically be measured CSI-RS, also can only to CSI-RS, be measured under certain condition.In addition, " Idle state " mentioned herein refers to communication terminal in the time of holding state.
Sending module 820, for when from Idle state, reverting to connected state, send to serving BS by described measurement result.After the measurement result that serving BS obtaining communication terminal is uploaded, according to measurement result select part or all of transfer point that communication terminal is safeguarded to participate in directly or indirectly and communication terminal between the CoMP transmission.In addition, " while from Idle state, returning to connected state " mentioned in this article both comprised when communication terminal reverts to connected state from Idle state, when also comprising that the communication terminal in Idle state accesses at random (the random access that such as upstream data arrival, downlink data arrival, Radio Link Failure etc. causes) or completing random access.
In above cited embodiment, the measuring process of safeguarding step, Idle state measurement module 630 of Idle state maintenance module 610 and the forwarding step of sending module 620, can unconditionally carry out, and also can only carry out under certain condition.
For example, Idle state maintenance module 610, only, in the Preset Time scope of Idle state, safeguard the configuration information of at least one CSI-RS; And/or, only, when the translational speed of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state; And/or, only, when the change in location of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state.
Again for example, Idle state measurement module 630 or 810, only, in the Preset Time scope of Idle state, the configuration information based at least one CSI-RS is measured to obtain measurement result; And/or only, when the translational speed of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result; And/or only, when the change in location of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result.
In addition, because the measurement to CSI-RS may periodically be carried out, be that communication terminal can be updated periodically measurement result when Idle state, Idle state maintenance module 610 is only when the measurement result of Idle state measurement module 630 is greater than predetermined threshold value, continue to safeguard the configuration information of described at least one CSI-RS when Idle state, and the configuration information of at least one CSI-RS of safeguarding based on Idle state maintenance module 610 of Idle state measurement module 620 is measured to obtain up-to-date measurement result.Similarly, Idle state measurement module 810 can also for: when described measurement result is greater than predetermined threshold value, the configuration information continued when Idle state based at least one CSI-RS is measured to obtain up-to-date measurement result.
Similarly, sending module 620 or 820, only, when the translational speed of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS; And/or only, when the change in location of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.Perhaps, sending module 620 or 820, only, when the measurement result of Idle state measurement module 630 or 810 is greater than predetermined threshold value, when from Idle state, reverting to connected state, the CSI-RS information (for example measurement result) that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
Idle state maintenance module 610 is safeguarded the configuration information of CSI-RS under certain condition, Idle state measurement module 630 or 810 is measured based on configuration information under certain condition, and sending module 620 or 820 sends CSI-RS information under certain condition to base station, in the time of can avoiding the configuration information of the CSI-RS that obtains when communication terminal useless, (for example communication terminal is when the fast moving state, because present position changes very fast, the COMP set that communication terminal is safeguarded when Idle state may and not be suitable for connected state) still useless CSI-RS configuration information is safeguarded, measure and send to base station useless CSI-RS information, affect the selecting properly of base station to transfer point, reduce communication quality.
In the equipment of Fig. 6, Fig. 7 and Fig. 8, the performed idiographic flow of modular unit can be with reference to the description of embodiment of the method before, and the present embodiment does not repeat.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise the flow process as the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.
Claims (16)
1. the method that CSI-RS information is provided, is characterized in that, comprising:
Safeguard the configuration information of at least one channel state information reference signals CSI-RS when Idle state;
When from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
2. the method for claim 1, is characterized in that, the configuration information of described at least one CSI-RS is last time serving BS configuration during connected state.
3. method as claimed in claim 1 or 2, is characterized in that, the configuration information of described at least one CSI-RS is from the broadcast of serving BS or neighbor base stations.
4. method as described as any one in claim 1-3, is characterized in that, described CSI-RS information comprises configuration information or CSI-RS sign corresponding to described configuration information of described CSI-RS.
5. method as described as any one in claim 1-4, it is characterized in that, safeguard the configuration information of at least one CSI-RS when Idle state after, described method also comprises: the configuration information of at least one CSI-RS based on safeguarded when Idle state is measured to obtain measurement result;
The described CSI-RS information of serving BS that sends to also comprises described measurement result.
6. method as claimed in claim 5, it is characterized in that, described measurement result comprises the overall measurement value of the subset of the overall measurement value of the measured value of each CSI-RS in the subset of the measured value of each CSI-RS in described at least one CSI-RS or described at least one CSI-RS or described at least one CSI-RS or described at least one CSI-RS.
7. method as described as any one in claim 1-6, is characterized in that, describedly safeguards that when Idle state the configuration information of at least one CSI-RS comprises:
Only, in the Preset Time scope of Idle state, safeguard the configuration information of at least one CSI-RS; And/or
Only, when the translational speed of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state; And/or
Only, when the change in location of communication terminal is in preset range, safeguard the configuration information of described at least one CSI-RS when Idle state.
8. method as described as claim 5 or 6, is characterized in that, described when Idle state the configuration information of at least one CSI-RS based on safeguarded measured to obtain measurement result and comprised:
Only, in the Preset Time scope of Idle state, the configuration information of at least one CSI-RS based on safeguarded is measured to obtain measurement result; And/or
Only, when the translational speed of communication terminal is in preset range, the configuration information of at least one CSI-RS based on safeguarded when Idle state is measured to obtain measurement result; And/or
Only, when the change in location of communication terminal is in preset range, the configuration information of at least one CSI-RS based on safeguarded when Idle state is measured to obtain measurement result.
9. method as described as claim 5 or 6, is characterized in that, after the configuration information of at least one CSI-RS based on safeguarded is measured to obtain measurement result, also comprises:
When described measurement result is greater than predetermined threshold value, continue to safeguard the configuration information of described at least one CSI-RS when Idle state, and the configuration information of at least one CSI-RS based on safeguarded is measured to obtain up-to-date measurement result.
10. method as described as claim 5 or 6, is characterized in that, described when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS to comprise:
Only, when the translational speed of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS; And/or
Only, when the change in location of communication terminal is in preset range, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS;
Only, when described measurement result is greater than predetermined threshold value, when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
11. the method that CSI-RS information is provided, is characterized in that, comprising:
Configuration information based at least one channel state information reference signals CSI-RS when Idle state is measured to obtain measurement result;
When from Idle state, reverting to connected state, described measurement result is sent to serving BS.
12. method as claimed in claim 11, is characterized in that, described when Idle state the configuration information based at least one channel state information reference signals CSI-RS measured to obtain measurement result and comprised:
Only, in the Preset Time scope of Idle state, the configuration information based at least one CSI-RS is measured to obtain measurement result; And/or
Only, when the translational speed of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result; And/or
Only, when the change in location of communication terminal is in preset range, the configuration information based at least one CSI-RS when Idle state is measured to obtain measurement result.
13. method as described as claim 11 or 12, is characterized in that, after the configuration information based at least one CSI-RS is measured to obtain measurement result, also comprises:
When described measurement result is greater than predetermined threshold value, the configuration information continued based at least one CSI-RS when Idle state is measured to obtain up-to-date measurement result.
14. a communication terminal, is characterized in that, comprising:
The Idle state maintenance module, for safeguarding the configuration information of at least one channel state information reference signals CSI-RS when the Idle state;
Sending module, for when from Idle state, reverting to connected state, the CSI-RS information that the configuration information of described at least one CSI-RS is corresponding sends to serving BS.
15. communication terminal as claimed in claim 14, is characterized in that, described communication terminal also comprises:
The Idle state measurement module, measured to obtain measurement result for the configuration information of at least one CSI-RS of safeguarding based on described Idle state maintenance module when the Idle state;
Described sending module sends to the CSI-RS information of serving BS also to comprise described measurement result.
16. a communication terminal, is characterized in that, comprising:
The Idle state measurement module, measured to obtain measurement result for the configuration information based at least one CSI-RS when the Idle state;
Sending module, for when from Idle state, reverting to connected state, send to serving BS by described measurement result.
Priority Applications (2)
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| CN201210190559.6A CN103491523B (en) | 2012-06-11 | 2012-06-11 | Method and the communication terminal of CSI-RS information are provided |
| PCT/CN2013/075257 WO2013185512A1 (en) | 2012-06-11 | 2013-05-07 | Method and communication terminal for providing csi-rs information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210190559.6A CN103491523B (en) | 2012-06-11 | 2012-06-11 | Method and the communication terminal of CSI-RS information are provided |
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| WO (1) | WO2013185512A1 (en) |
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Also Published As
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| CN103491523B (en) | 2016-09-28 |
| WO2013185512A1 (en) | 2013-12-19 |
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