CN102281128A

CN102281128A - Channel state information feedback triggering and feeding back method and device thereof

Info

Publication number: CN102281128A
Application number: CN2011102260527A
Authority: CN
Inventors: 陈文洪; 高秋彬; 张然然; 李辉
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-08-08
Filing date: 2011-08-08
Publication date: 2011-12-14
Anticipated expiration: 2031-08-08
Also published as: CN102281128B; WO2013020510A1

Abstract

The embodiment of the invention discloses a CSI (Channel State Information) feedback triggering and feeding back method and a device thereof, relating to the technical field of wireless communication, and being used for implementing a scheme that a terminal executes non-periodic CSI feedback according to an expanded non-periodic CSI feedback mode capable of supporting COMP (Coordinated Multipoint) transmission. In the method, a base station determines the expanded non-periodic CSI feedback mode used for executing the non-periodic CSI feedback by the terminal, and notifies the terminal with the determined feedback mode through signaling; the base station triggers the terminal by the signaling to execute the non-periodic CSI feedback according to the expanded non-periodic CSI feedback mode; the terminal executes the non-periodic CSI feedback according to the expanded non-periodic CSI feedback mode. With the method and the device, the terminal can execute the scheme of the non-periodic CSI feedback according to the expanded non-periodic CSI feedback mode.

Description

Channel condition information feedback triggering and feedback method and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of channel condition information feedback triggering and feedback method and equipment.

Background technology

(Coordinated Multipoint Transmission/Reception, CoMP) technology is meant the cooperation between a plurality of transmission points that separate on the geographical position to multi-point cooperative transmission.In general, a plurality of transmission points are base stations of different districts, a plurality of RRH of perhaps same cell base station control.By the cooperation transmission between a plurality of transmission points, can effectively reduce the interference between the different transmission points, improve the particularly throughput of Cell Edge User of user.Descending multi-point cooperative transmission technical scheme mainly is divided into two classes: and cooperative scheduling/wave beam forming (cooperative scheduling/beamforming, CS/CB) and Combined Treatment (Joint processing).

Cooperative scheduling is the coordination by time, frequency and space resources between the transmission point, avoids or reduces each other interference.The interference of minizone is the principal element of restriction Cell Edge User terminal (UE) performance, so cooperative scheduling can improve the performance of cell edge UE by reducing the interference of minizone.As shown in Figure 1, by the cooperative schedulings of three transmission points, three UE that may the phase mutual interference have dispatched on the mutually orthogonal resource, have effectively avoided the interference between the transmission point.Collaborative wave beam forming is dispatched by the figuration direction to a plurality of users in the cooperation cell, makes different districts user's beam direction mutually orthogonal, thereby reduces interference each other.Be similar to the many input and output of multi-user (MU-MIMO) transmission of single sub-district, collaborative wave beam forming is mainly handled by the interference inhibition of transmitting terminal and is realized.Therefore, for the interference that the transmission that suppresses this user is transmitted other users, need obtain the descending channel information of cooperation cell at the base station end.

The Combined Treatment scheme comprises the switching of dynamic transmission point and unites the transmission dual mode.During dynamic transmission point switched, the base station can be switched the transmission point that sends signal to the user dynamically, thus each transmission point transmission data of selecting optimum.In order to realize that dynamic transmission point switches, the base station need obtain the channel information of a plurality of optional sub-districts by feedback channel, perhaps obtains the channel information of optimal transmission point.A plurality of transmission points send data to UE simultaneously in the associating delivery plan, to strengthen the UE received signal.As shown in Figure 2, three transmission points send data to a UE on identical resource, and UE receives the signal of a plurality of sub-districts simultaneously.On the one hand, stack can promote the signal quality that UE receives from the useful signal of a plurality of sub-districts, on the other hand, has reduced the interference that UE is subjected to, thereby improves systematic function.This scheme requires UE to feed back the channel information of a plurality of sub-districts, even also wants the relative channel information of minizone, thus guarantee a plurality of sub-districts can unite dispatch, precoding and data transmission.

Downlink channel condition information (CSI) feedback mainly contain cycle CSI feedback and aperiodic CSI feed back dual mode, wherein the former is by Physical Uplink Control Channel (PUCCH) transmitting feedback information, and the latter is by Physical Uplink Shared Channel (PUSCH) transmitting feedback information.In existing long-term evolution upgrading (LTE-A) system, after UE receives the indication that aperiodic, CSI triggered,, in PUSCH, carry out the feedback of corresponding CSI according to current downlink transfer pattern configurations and CSI feedback model configuration aperiodic.System supports following several different CSI feedback model aperiodic at present.

In the LTE-A system, UE estimates the channel information of base station to UE according to the channel information measurement reference signal (CSI-RS) of base station configuration, and calculate channel quality indication (CQI) information (CQI) and feed back to the base station, index that may also have pre-coding matrix (PMI) and the number of data streams (RI) together fed back with CQI.The base station can be triggered UE by Downlink Control Information (DCI) and be carried out reporting of aperiodic channel status information (CSI), after UE receives triggering command, by the RI/PMI/CQI of Physical Uplink Shared Channel (PUSCH) according to specific feedback model feeding back downlink.If this moment cell configuration a plurality of descending carriers, also need in triggering command, indicate the channel information that feeds back which carrier wave.

In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:

Several feedback models that aperiodic, the CSI feedback was supported all can only feed back the channel information of single transmission point, and the base station can not obtain the channel information of a plurality of transmission points, thereby are difficult to carry out cooperative scheduling or collaborative transmission.

Summary of the invention

The embodiment of the invention provides a kind of channel condition information feedback triggering method and equipment, is used to realize that the base station triggers terminal carries out the scheme of CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion that can support the COMP transmission.

A kind of channel condition information CSI feedback triggering method, this method comprises:

The base station determines that terminal carries out CSI feedback model aperiodic of the expansion that CSI feedback is adopted aperiodic, and by signaling the feedback model of determining is notified to terminal; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

CSI feedback aperiodic is carried out by CSI feedback model aperiodic of signaling triggering terminal according to described expansion in the base station.

A kind of base station, this base station comprises:

Notification unit is used for CSI feedback model aperiodic that definite terminal is carried out the expansion that the CSI feedback is adopted aperiodic, and by signaling the feedback model of determining is notified to terminal; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Trigger element is used for by the aperiodic CSI feedback model of signaling triggering terminal according to described expansion, carries out CSI feedback aperiodic.

In this programme, the base station determines that terminal carries out CSI feedback model aperiodic of the expansion that CSI feedback is adopted aperiodic, and by signaling the feedback model of determining is notified to terminal; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information at the corresponding down CSI of current data flow amount (RI), and/or one or more second in the aperiodic CSI measuring assembly set transmission point measurement information and set CSI corresponding under the RI, then by the aperiodic CSI feedback model of signaling triggering terminal according to described expansion, carry out CSI feedback aperiodic, thereby realized that the base station triggers terminal carries out the scheme of CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion that can support the COMP transmission.

The embodiment of the invention provides a kind of channel state information feedback method and equipment, is used to realize that CSI feedback model aperiodic that can support the expansion that COMP transmits that terminal is indicated according to the base station carries out the scheme that aperiodic, CSI fed back.

A kind of channel condition information CSI feedback method, this method comprises:

Terminal receive expansion that carrying out CSI aperiodic feedback that the base station sends adopted aperiodic the CSI feedback model notice; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

After terminal receives the triggering signaling of the carrying out CSI aperiodic feedback that the base station sends, carry out CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion of being notified.

A kind of terminal, this terminal comprises:

Receiving element, be used to receive expansion that carrying out CSI aperiodic feedback that the base station sends adopted aperiodic the CSI feedback model notice; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Feedback unit is used for after the triggering signaling that receives the carrying out CSI aperiodic feedback that the base station sends, and carries out CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion of being notified.

In this programme, terminal receive expansion that carrying out CSI aperiodic feedback that the base station sends adopted aperiodic the CSI feedback model notice; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI; Then after the triggering signaling of the carrying out CSI aperiodic feedback that receives the base station transmission, CSI feedback model aperiodic according to the expansion of being notified carries out CSI feedback aperiodic, thereby has realized that CSI feedback model aperiodic that can support the expansion that COMP transmits that terminal is indicated according to the base station carries out the scheme that aperiodic, CSI fed back.

Description of drawings

Fig. 1 is a transmission point cooperative scheduling schematic diagram of the prior art;

Fig. 2 unites the transmission schematic diagram for transmission point of the prior art;

The method flow schematic diagram that Fig. 3 provides for the embodiment of the invention;

The other method schematic diagram that Fig. 4 provides for the embodiment of the invention;

The device structure schematic diagram that Fig. 5 provides for the embodiment of the invention;

Another device structure schematic diagram that Fig. 6 provides for the embodiment of the invention.

Embodiment

Among the present invention, need the base station in advance by high-level signaling etc. with aperiodic the CSI measuring assembly dispose to terminal, aperiodic, the CSI measuring assembly was the set that comprises one or more transmission point measurement information, each transmission point measurement information can comprise the configuration information of the downlink reference signal of one or more descending carrier, the perhaps index of this configuration information, perhaps transmit point pairing cell ID (ID) information, the configuration information of this downlink reference signal can be the configuration information of CSI-RS etc.

In order to realize that the base station triggers terminal carries out the scheme of CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion that can support COMP transmission, the embodiment of the invention provides a kind of CSI feedback triggering method.

Referring to Fig. 3, the CSI feedback triggering method that the embodiment of the invention provides may further comprise the steps:

Step 30: the base station determines that terminal carries out CSI feedback model aperiodic of the expansion that CSI feedback is adopted aperiodic, and by signaling the feedback model of determining is notified to terminal; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Here, the CSI of certain transmission point measurement information correspondence under current RI is meant the CSI that obtains according to this transmission point measurement information measurement under the current RI of this transmission point measurement information correspondence.Certain transmission point measurement information is being set CSI corresponding under the RI, is meant the CSI that obtains according to this transmission point measurement information measurement under the RI setting.

Step 31: CSI feedback aperiodic is carried out by CSI feedback model aperiodic of signaling triggering terminal according to described expansion in the base station.

Concrete, described setting RI is the fixedly RI that makes an appointment with terminal, perhaps the current RI of a transmission point measurement information correspondence.For example, set RI and can be 1.

If need to report RI under the current transmission mode, the RI that then current RI reports for the current needs of transmission point measurement information at correspondence; If do not need to report RI under the current transmission mode, then current RI is 1.

CSI feedback model aperiodic to expansion is illustrated below:

Example 1, CSI feedback model aperiodic of described expansion is mode of extension 1-2; The feedback content of mode of extension 1-2 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back channel quality indication (CQI) information in a broadband current RI under and the pre-coding matrix of S the subband that current RI high level down disposes respectively and indicate (PMI) information; And/or,

Set transmission point measurement information at one or more second in the aperiodic CSI measuring assembly, feedback is set the CQI information in a RI broadband down and the PMI information under the setting RI respectively.

Concrete, the PMI information under the described setting RI is: the PMI information of a subband, or the PMI information of a plurality of subbands, or the PMI in a broadband.

Preferable, for fear of the feedback redundant information, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, just second sets transmission point measurement feedback information and sets the CQI information in a broadband under the RI and the PMI information under the setting RI at this.Be included in first and set in the transmission point measurement information and current RI is described settings RI if second sets transmission point measurement information, then second do not set and transmit point measurement feedback information CSI at this.

Example 2, CSI feedback model aperiodic of described expansion is mode of extension 3-0; The feedback content of mode of extension 3-0 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information in a broadband current RI under and the PMI information of the subband that a current RI high level down disposes respectively; And/or,

Set transmission point measurement information at one or more second in the aperiodic CSI measuring assembly, feedback is set the CQI information in a RI broadband down and/or is set the CQI information of the subband that a RI high level down disposes respectively.

Preferable, for fear of the feedback redundant information, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, just sets the CQI information that transmission point measurement feedback information is set the CQI information in a RI broadband down and/or set the subband that a high level under the RI disposes at second.Be included in first and set in the transmission point measurement information and current RI is described settings RI if second sets transmission point measurement information, then second do not set and transmit point measurement feedback information CSI at this

Example 3, CSI feedback model aperiodic of described expansion is mode of extension 3-1; The feedback content of mode of extension 3-1 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information in a broadband current RI under and the PMI and the CQI information of the subband that the high level under the current RI disposes respectively; And/or,

Set transmission point measurement information at one or more second in the aperiodic CSI measuring assembly, feedback is set at least one information in the CQI information of the CQI information in a RI broadband down, the PMI information of setting a RI broadband down, the PMI that sets the subband that RI high level down disposes and the subband that the high level under the setting RI disposes respectively.

Preferable, for fear of the feedback redundant information, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, second sets transmission point measurement feedback information and sets the CQI information in a RI broadband down, sets at least one information in the CQI information of the PMI information in a RI broadband down, the PMI that sets the subband that the high level under the RI disposes and the subband that the high level under the setting RI disposes at this.Be included in first and set in the transmission point measurement information and current RI is described settings RI if second sets transmission point measurement information, then second do not set and transmit point measurement feedback information CSI at this.

Example 4, CSI feedback model aperiodic of described expansion is mode of extension 2-0; The feedback content of mode of extension 2-0 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information of M subband of the CQI information in a broadband current RI under and the selection of the user under the current RI respectively; And/or,

Set transmission point measurement information at one or more second in the aperiodic CSI measuring assembly, feedback is set the CQI information in a RI broadband down and/or is set the CQI information of M subband of the user's selection under the RI respectively.

Preferable, for fear of the feedback redundant information, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, second sets the CQI information that transmission point measurement feedback information is set M subband of the CQI information in a RI broadband down and/or the user's selection under the setting RI at this.Be included in first and set in the transmission point measurement information and current RI is described settings RI if second sets transmission point measurement information, then second do not set and transmit point measurement feedback information CSI at this.

Example 5, CSI feedback model aperiodic of described expansion is mode of extension 2-2; The feedback content of mode of extension 2-2 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the PMI of M subband of CQI information, the selection of the user current RI under in a broadband current RI under and the PMI information of the subband that the high level under CQI information and the current RI disposes respectively; And/or,

Set transmission point measurement information at one or more second in the aperiodic CSI measuring assembly, feedback is set at least one information in the CQI information of M subband of the CQI information in a RI broadband down, the PMI of M subband that sets the following broadband P MI information of RI, the PMI that sets the subband of RI high level configuration down, the CQI information of setting the subband of RI high level configuration down, the user's selection under the setting RI and the user's selection under the setting RI respectively.

Preferable, for fear of the feedback redundant information, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, at this second CQI information of setting a broadband under transmission point measurement feedback information setting RI, set the broadband P MI information under the RI, set the PMI of the subband of the high level configuration under the RI, set the CQI information of the subband of the high level configuration under the RI, at least one information in the CQI information of M the subband that the user under the PMI of M the subband that the user under the setting RI selects and the setting RI selects.Be included in first and set in the transmission point measurement information and current RI is described settings RI if second sets transmission point measurement information, then second do not set and transmit point measurement feedback information CSI at this.

In above-mentioned 5 examples, described one or more first sets transmission point measurement information is: the main transmission point measurement information that base station indication or terminal are determined, perhaps each transmission point measurement information in the optional set of main transmission point measurement information of base station indication.

Preferable, in above-mentioned 5 examples, feedback content can also comprise: the main transmission point measurement information that feedback terminal is recommended or the index information of this metrical information.

Preferable, in above-mentioned 5 examples, feedback content can also comprise: other all or part of transmission point measurement information in feedback CSI measuring assembly aperiodic except that reference transmission point measurement information are with respect to the phase place and/or the amplitude information of reference transmission point measurement information.Reference transmission point measurement information can preestablish according to actual needs, for example can be main transmission point measurement information.

In order to realize that CSI feedback model aperiodic that can support the expansion that COMP transmits that terminal is indicated according to the base station carries out the scheme that aperiodic, CSI fed back, the embodiment of the invention provides a kind of CSI feedback method.

Referring to Fig. 4, the CSI feedback method that the embodiment of the invention provides may further comprise the steps:

Step 40: terminal receive expansion that carrying out CSI aperiodic feedback that the base station sends adopted aperiodic the CSI feedback model notice; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Step 41: after terminal receives the triggering signaling of the carrying out CSI aperiodic feedback that the base station sends, carry out CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion of being notified.

Concrete, described setting RI is the fixedly RI that makes an appointment with the base station, perhaps the current RI of a transmission point measurement information correspondence.

Below terminal is carried out CSI feedback aperiodic according to the CSI feedback model of expanding aperiodic, is illustrated:

Example 1, when the aperiodic of described expansion, the CSI feedback model was mode of extension 1-2, being achieved as follows of step 41:

Terminal pins is set transmission point measurement information to one or more first in the aperiodic CSI measuring assembly, feeds back the channel quality indicator (CQI) information in a broadband current RI under and the pre-coding matrix of S the subband that the high level current RI under disposes respectively and indicates PMI information; And/or,

Terminal pins is set transmission point measurement information to one or more second in the aperiodic CSI measuring assembly, and feedback is set the CQI information in a RI broadband down and the PMI information under the setting RI respectively.

Preferable, for fear of the feedback redundant information, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting following time of RI, second set transmission point measurement feedback information and set the CQI information in a RI broadband down and the PMI information under the setting RI at this.If second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting under the RI, then second do not set transmission point measurement feedback information CSI at this.

Example 2, when the aperiodic of described expansion, the CSI feedback model was mode of extension 3-0, being achieved as follows of step 41:

Terminal pins is set transmission point measurement information to one or more first in the aperiodic CSI measuring assembly, feeds back the CQI information in a broadband current RI under and the PMI information of the subband that a current RI high level down disposes respectively; And/or,

Terminal pins is set transmission point measurement information to one or more second in the aperiodic CSI measuring assembly, and feedback is set the CQI information in a RI broadband down and/or set the CQI information of the subband that a RI high level down disposes respectively.

Preferable, for fear of the feedback redundant information, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second set transmission point measurement information be included in first set in the transmission point measurement information and current RI when setting RI, set the CQI information that transmission point measurement feedback information is set the CQI information in a RI broadband down and/or set the subband that a RI high level down disposes at second.If second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting RI, then second do not set transmission point measurement feedback information CSI at this.

Example 3, when the aperiodic of described expansion, the CSI feedback model was mode of extension 3-1, being achieved as follows of step 41:

Terminal pins is set transmission point measurement information to one or more first in the aperiodic CSI measuring assembly, feeds back the CQI information in a broadband current RI under and the PMI and the CQI information of the subband that the high level under the current RI disposes respectively; And/or,

Terminal pins is set transmission point measurement information to one or more second in the aperiodic CSI measuring assembly, and feedback is set at least one information in the CQI information of the CQI information in a RI broadband down, the PMI information of setting a RI broadband down, the PMI that sets the subband that RI high level down disposes and the subband that the high level under the setting RI disposes respectively.

Preferable, for fear of the feedback redundant information, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second set transmission point measurement information be included in first set in the transmission point measurement information and current RI when setting RI, second set transmission point measurement feedback information and set the CQI information in a RI broadband down, set at least one information in the CQI information of the PMI information in a RI broadband down, the PMI that sets the subband that RI high level down disposes and the subband that the high level under the setting RI disposes at this.If second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting RI, then second do not set transmission point measurement feedback information CSI at this.

Example 4, when the aperiodic of described expansion, the CSI feedback model was mode of extension 2-0, being achieved as follows of step 41:

Terminal pins is set transmission point measurement information to one or more first in the aperiodic CSI measuring assembly, feeds back the CQI information of M subband of the CQI information in a broadband current RI under and the selection of the user under the current RI respectively; And/or,

Terminal pins is set transmission point measurement information to one or more second in the aperiodic CSI measuring assembly, and feedback is set the CQI information in a RI broadband down and/or set the CQI information of M subband of the user's selection under the RI respectively.

Preferable, for fear of the feedback redundant information, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second set transmission point measurement information be included in first set in the transmission point measurement information and current RI when setting RI, second set the CQI information that transmission point measurement feedback information is set the CQI information in a RI broadband down and/or set M subband of the user's selection under the RI at this.If second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting RI, then second do not set transmission point measurement feedback information CSI at this.

Example 5, when the aperiodic of described expansion, the CSI feedback model was mode of extension 2-2, being achieved as follows of step 41:

Terminal pins is set transmission point measurement information to one or more first in the aperiodic CSI measuring assembly, feeds back the PMI of M subband of CQI information, the selection of the user current RI under in a broadband current RI under and the PMI information of the subband that the high level under CQI information and the current RI disposes respectively; And/or,

Terminal pins is set transmission point measurement information to one or more second in the aperiodic CSI measuring assembly, and feedback is set at least one information in the CQI information of M subband of the CQI information in a RI broadband down, the PMI of M subband that sets the following broadband P MI information of RI, the PMI that sets the subband of RI high level configuration down, the CQI information of setting the subband of RI high level configuration down, the user's selection under the setting RI and the user's selection under the setting RI respectively.

Preferable, for fear of the feedback redundant information, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second set transmission point measurement information be included in first set in the transmission point measurement information and current RI when setting RI, second set the CQI information that transmission point measurement feedback information is set a broadband under the RI at this, set the broadband P MI information under the RI, set the PMI of the subband of the high level configuration under the RI, set the CQI information of the subband of the high level configuration under the RI, at least one information in the CQI information of M the subband that the user under the PMI of M the subband that the user under the setting RI selects and the setting RI selects.If second set transmission point measurement information be included in first set in the transmission point measurement information and current RI for setting RI, then second do not set transmission point measurement feedback information CSI at this.

In above-mentioned 5 examples, described one or more first sets transmission point measurement information is: the main transmission point measurement information that base station indication or terminal are determined, the perhaps main transmission point measurement information of each in the optional set of main transmission point measurement information of base station indication.

Preferable, in above-mentioned 5 examples, the feedback content in the step 41 can also comprise: the main transmission point measurement information that feedback terminal is recommended or the index information of this metrical information.

Preferable, in above-mentioned 5 examples, the feedback content in the step 41 can also comprise: other all or part of transmission point measurement information in feedback CSI measuring assembly aperiodic except that reference transmission point measurement information are with respect to the phase place and/or the amplitude information of reference transmission point measurement information.Reference transmission point measurement information can preestablish according to actual needs, for example can be main transmission point measurement information.

Below to the present invention will be described with specific embodiment:

Embodiment one:

The feedback model 1-2 of expansion:

Perhaps

Embodiment two:

The feedback model 3-0 of expansion:

Perhaps

Embodiment three:

The feedback model 3-1 of expansion:

Perhaps

Perhaps

Embodiment four:

The feedback model 2-0 of expansion:

Perhaps

Embodiment five:

The feedback model 2-2 of expansion:

Perhaps

Referring to Fig. 5, the embodiment of the invention also provides a kind of base station, and this base station comprises:

Notification unit 50 is used for CSI feedback model aperiodic that definite terminal is carried out the expansion that the CSI feedback is adopted aperiodic, and by signaling the feedback model of determining is notified to terminal; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Trigger element 51 is used for by the aperiodic CSI feedback model of signaling triggering terminal according to described expansion, carries out CSI feedback aperiodic.

Described setting RI is the fixedly RI that makes an appointment with terminal, perhaps the current RI of a transmission point measurement information correspondence.

CSI feedback model aperiodic of described expansion is mode of extension 1-2; The feedback content of mode of extension 1-2 correspondence comprises:

Set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the channel quality indicator (CQI) information in a broadband current RI under and the pre-coding matrix of S the subband that the high level current RI under disposes respectively and indicate PMI information; And/or,

PMI information under the described setting RI is:

The PMI information of a subband, or the PMI information of a plurality of subbands, or the PMI in a broadband.

CSI feedback model aperiodic of described expansion is mode of extension 3-0; The feedback content of mode of extension 3-0 correspondence comprises:

CSI feedback model aperiodic of described expansion is mode of extension 3-1; The feedback content of mode of extension 3-1 correspondence comprises:

CSI feedback model aperiodic of described expansion is mode of extension 2-0; The feedback content of mode of extension 2-0 correspondence comprises:

CSI feedback model aperiodic of described expansion is mode of extension 2-2; The feedback content of mode of extension 2-2 correspondence comprises:

Setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, feeds back this and second sets transmission point measurement information at the CSI that sets correspondence under the RI.

Feedback content also comprises: the main transmission point measurement information that feedback is recommended or the index information of this metrical information.

Feedback content also comprises:

Other all or part of transmission point measurement information in feedback CSI measuring assembly aperiodic except that reference transmission point measurement information are with respect to the phase place and/or the amplitude information of reference transmission point measurement information.

Referring to Fig. 6, the embodiment of the invention also provides a kind of terminal, and this terminal comprises:

Receiving element 60, be used to receive expansion that carrying out CSI aperiodic feedback that the base station sends adopted aperiodic the CSI feedback model notice; This expansion aperiodic CSI feedback model correspondence feedback content comprise: one or more first in the feedback aperiodic CSI measuring assembly set transmission point measurement information one or more second in corresponding CSI and/or aperiodic CSI measuring assembly under current data flow amount RI and set transmission point measurement information and setting CSI corresponding under the RI;

Feedback unit 61 is used for after the triggering signaling that receives the carrying out CSI aperiodic feedback that the base station sends, and carries out CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion of being notified.

Described setting RI is the fixedly RI that makes an appointment with the base station, perhaps the current RI of a transmission point measurement information correspondence.

Described feedback unit 61 is used for:

When the aperiodic of described expansion, the CSI feedback model was mode of extension 1-2, set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the channel quality indicator (CQI) information in a broadband current RI under and the pre-coding matrix of S the subband that the high level current RI under disposes respectively and indicate PMI information; And/or,

PMI information under the described setting RI is: the PMI information of a subband, or the PMI information of a plurality of subbands, or the PMI in a broadband.

Described feedback unit 61 is used for:

When the aperiodic of described expansion, the CSI feedback model was mode of extension 3-0, set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information in a broadband current RI under and the PMI information of the subband that a current RI high level down disposes respectively; And/or,

Described feedback unit 61 is used for:

When the aperiodic of described expansion, the CSI feedback model was mode of extension 3-1, set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information in a broadband current RI under and the PMI and the CQI information of the subband that the high level under the current RI disposes respectively; And/or,

Described feedback unit 61 is used for:

When the aperiodic of described expansion, the CSI feedback model was mode of extension 2-0, set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the CQI information of M subband of the CQI information in a broadband current RI under and the selection of the user under the current RI respectively; And/or,

Described feedback unit 61 is used for:

When the aperiodic of described expansion, the CSI feedback model was mode of extension 2-2, set transmission point measurement information at one or more first in the aperiodic CSI measuring assembly, feed back the PMI of M subband of CQI information, the selection of the user current RI under in a broadband current RI under and the PMI information of the subband that the high level under CQI information and the current RI disposes respectively; And/or,

Described feedback unit 61 is used for:

Described feedback unit 61 also is used for:

The main transmission point measurement information that feedback is recommended or the index information of this metrical information.

Described feedback unit 61 also is used for:

To sum up, in the scheme that the embodiment of the invention provides, the base station determines that terminal carries out CSI feedback model aperiodic of the expansion that CSI feedback is adopted aperiodic; This expansion aperiodic CSI feedback model correspondence feedback content comprise: the one or more transmission point measurement information in the feedback aperiodic CSI measuring assembly are at the corresponding down CSI of current data flow amount (RI), and the one or more transmission point measurement information in the aperiodic CSI measuring assembly are being set CSI corresponding under the RI, then by the aperiodic CSI feedback model of signaling triggering terminal according to described expansion, carry out CSI feedback aperiodic, thereby realized that the base station triggers terminal carries out the scheme of CSI feedback aperiodic according to CSI feedback model aperiodic of the expansion that can support the COMP transmission.

CSI feedback model aperiodic according to expansion that terminal receives the base station transmission carries out the triggering signaling that aperiodic, CSI fed back; This expansion aperiodic CSI feedback model correspondence feedback content comprise: the one or more transmission point measurement information in corresponding CSI and the aperiodic CSI measuring assembly under current data flow amount RI of the one or more transmission point measurement information in the feedback aperiodic CSI measuring assembly are being set CSI corresponding under the RI; CSI feedback model aperiodic according to described expansion carries out CSI feedback aperiodic then, thereby has realized that CSI feedback model aperiodic that can support the expansion that COMP transmits that terminal is indicated according to the base station carries out the scheme that aperiodic, CSI fed back.

The present invention can support unicast and CoMP to transmit feedback aperiodic of required CSI simultaneously; And can support various CoMP transmission modes.

The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a channel condition information CSI feeds back triggering method, it is characterized in that this method comprises:

2. the method for claim 1 is characterized in that, described setting RI is the fixedly RI that makes an appointment with terminal, perhaps the current RI of a transmission point measurement information correspondence.

3. method as claimed in claim 1 or 2 is characterized in that, if need to report RI under the current transmission mode, and the RI that then current RI reports for the current needs of transmission point measurement information at correspondence; If do not need to report RI under the current transmission mode, then current RI is 1.

4. the method for claim 1 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 1-2; The feedback content of mode of extension 1-2 correspondence comprises:

5. method as claimed in claim 4 is characterized in that, the PMI information under the described setting RI is:

6. the method for claim 1 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-0; The feedback content of mode of extension 3-0 correspondence comprises:

7. the method for claim 1 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-1; The feedback content of mode of extension 3-1 correspondence comprises:

8. the method for claim 1 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-0; The feedback content of mode of extension 2-0 correspondence comprises:

9. the method for claim 1 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-2; The feedback content of mode of extension 2-2 correspondence comprises:

10. the method for claim 1, it is characterized in that, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, feeds back this and second sets transmission point measurement information at the CSI that sets correspondence under the RI.

11., it is characterized in that feedback content also comprises as arbitrary described method among the claim 4-9:

12., it is characterized in that feedback content also comprises as arbitrary described method among the claim 4-9:

13. a channel condition information CSI feedback method is characterized in that this method comprises:

14. method as claimed in claim 13 is characterized in that, described setting RI is the fixedly RI that makes an appointment with the base station, perhaps the current RI of a transmission point measurement information correspondence.

15. as claim 13 or 14 described methods, it is characterized in that, if need to report RI under the current transmission mode, the RI that then current RI reports for the current needs of transmission point measurement information at correspondence; If do not need to report RI under the current transmission mode, then current RI is 1.

16. method as claimed in claim 13 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 1-2; Described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and comprises:

17. method as claimed in claim 16 is characterized in that, the PMI information under the described setting RI is: the PMI information of a subband, or the PMI information of a plurality of subbands, or the PMI in a broadband.

18. method as claimed in claim 13 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-0; Described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and comprises:

19. method as claimed in claim 13 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-1; Described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and comprises:

20. method as claimed in claim 13 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-0; Described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and comprises:

21. method as claimed in claim 13 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-2; Described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and comprises:

22. method as claimed in claim 13, it is characterized in that, terminal is set transmission point measurement information second and is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, feeds back this and second sets transmission point measurement information at the CSI that sets correspondence under the RI.

23., it is characterized in that described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and also comprises as arbitrary described method among the claim 16-21:

24., it is characterized in that described CSI feedback model aperiodic according to the expansion of being notified carries out aperiodic CSI feedback and also comprises as arbitrary described method among the claim 16-21:

25. a base station is characterized in that, this base station comprises:

26. base station as claimed in claim 25 is characterized in that, described setting RI is the fixedly RI that makes an appointment with terminal, perhaps the current RI of a transmission point measurement information correspondence.

27. as claim 25 or 26 described base stations, it is characterized in that, if need to report RI under the current transmission mode, the RI that then current RI reports for the current needs of transmission point measurement information at correspondence; If do not need to report RI under the current transmission mode, then current RI is 1.

28. base station as claimed in claim 25 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 1-2; The feedback content of mode of extension 1-2 correspondence comprises:

29. base station as claimed in claim 28 is characterized in that, the PMI information under the described setting RI is:

30. base station as claimed in claim 25 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-0; The feedback content of mode of extension 3-0 correspondence comprises:

31. base station as claimed in claim 25 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 3-1; The feedback content of mode of extension 3-1 correspondence comprises:

32. base station as claimed in claim 25 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-0; The feedback content of mode of extension 2-0 correspondence comprises:

33. base station as claimed in claim 25 is characterized in that, CSI feedback model aperiodic of described expansion is mode of extension 2-2; The feedback content of mode of extension 2-2 correspondence comprises:

34. base station as claimed in claim 25, it is characterized in that, setting transmission point measurement information second is not included in the first setting transmission point measurement information, perhaps this second is set transmission point measurement information and is included in first and sets in the transmission point measurement information and current RI during for described settings RI, feeds back this and second sets transmission point measurement information at the CSI that sets correspondence under the RI.

35., it is characterized in that feedback content also comprises as arbitrary described base station among the claim 28-33:

36., it is characterized in that feedback content also comprises as arbitrary described base station among the claim 28-33:

37. a terminal is characterized in that, this terminal comprises:

38. terminal as claimed in claim 37 is characterized in that, described setting RI is the fixedly RI that makes an appointment with the base station, perhaps the current RI of a transmission point measurement information correspondence.

39. as claim 37 or 38 described terminals, it is characterized in that, if need to report RI under the current transmission mode, the RI that then current RI reports for the current needs of transmission point measurement information at correspondence; If do not need to report RI under the current transmission mode, then current RI is 1.

40. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

41. terminal as claimed in claim 40 is characterized in that, the PMI information under the described setting RI is: the PMI information of a subband, or the PMI information of a plurality of subbands, or the PMI in a broadband.

42. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

43. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

44. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

45. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

46. terminal as claimed in claim 37 is characterized in that, described feedback unit is used for:

47., it is characterized in that described feedback unit also is used for as arbitrary described terminal among the claim 40-45:

48., it is characterized in that described feedback unit also is used for as arbitrary described terminal among the claim 40-45: