CN102006624B

CN102006624B - The method of the trigger mode of base station and notice aperiodic channel status information reports thereof

Info

Publication number: CN102006624B
Application number: CN201010565422.5A
Authority: CN
Inventors: 朱鹏; 戴博; 梁春丽; 杨维维; 喻斌
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-11-29
Filing date: 2010-11-29
Publication date: 2015-08-12
Anticipated expiration: 2030-11-29
Also published as: WO2012071888A1; CN102006624A

Abstract

The invention discloses the method for the trigger mode of a kind of base station and notice CSI report aperiodic thereof, to solve the problem of the triggering mode underaction of CSI feedback aperiodic in prior art, in the method, the trigger mode of predefine CSI report aperiodic and corresponding triggering mode, the method comprises: a kind of trigger mode is selected in base station in predefined trigger mode, and selects corresponding triggering mode; Selected trigger mode is informed to UE by selected triggering mode by base station; Wherein, predefined triggering mode comprise trigger command, at least one comprised in the DCI format of the PDCCH of trigger command, the search volume comprising the PDCCH of trigger command, higher level parameters and high-level signaling.The invention solves the problem of the triggering mode underaction of CSI report aperiodic in prior art, saved triggers signaling overhead and transport overhead, avoided system resource waste.

Description

Base station and method for informing trigger mode of aperiodic channel state information report

Technical Field

The present invention relates to aperiodic Channel State Information (CSI) reporting in the field of communications, and in particular, to a base station and a method for notifying a trigger mode of an aperiodic CSI report.

Background

In a third Generation partnership project Long Term Evolution system (3 GPP LTE), after a User Equipment (UE) obtains Channel State Information (CSI) of a downlink channel according to a downlink reference signal (reference signal), The obtained CSI is fed back to a base station (eNodeB, eNB). And the base station determines the modulation and coding mode, the physical resource position and the transmission mode of the data sent to the UE according to the CSI fed back by the UE.

In LTE systems, CSI includes three forms: channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI).

In the LTE system, the CSI feedback of the downlink channel by the UE has two modes, namely periodic feedback and aperiodic feedback, which are respectively called periodic CSI reporting (also called periodic CSI reporting) and aperiodic CSI reporting (also called aperiodic CSI reporting). The periodic CSI report means that the UE periodically feeds back CSI according to the configuration of the base station; the aperiodic CSI report refers to that the base station triggers the UE to feed back the CSI once through a trigger command.

For periodic CSI reporting, generally, if the UE does not send a Physical Uplink Shared Channel (PUSCH) on a subframe (subframe), CSI is transmitted on a Physical Uplink Control Channel (PUCCH); if the UE sends the PUSCH, the CSI bearer is transmitted on the PUSCH. For aperiodic CSI reports, transmission is only on PUSCH.

In the LTE system, a base station schedules a certain UE to transmit a PUSCH through Uplink grant (UL grant) signaling. The uplink scheduling grant signaling may be transmitted to the scheduled UE by a Physical Downlink Control Channel (PDCCH) having a Downlink Control Information (DCI) format 0(format 0). 1bit of the DCI format0 is a trigger command for triggering the UE to feed back the aperiodic CSI report, which is called a channel quality indication request (CQI request).

If the UE detects a PDCCH with a DCI format0 format belonging thereto, the PUSCH is transmitted according to the UL grant contained therein. And if the UE detects that the 1-bit CQIrequest in the DCI format0 is set to be 1, sending an aperiodic CSI report in the PUSCH scheduled by the DCI format 0.

According to physical resources of PDCCH transmission, a common (common) search space (Searchspace) and a user equipment-Specific (UE-Specific) search space are defined.

An LTE-Advanced (LTE-a) system is a next generation evolution system of the LTE system, and a Carrier Aggregation (CA) technology is used to extend a transmission bandwidth and support a larger peak transmission rate.

Fig. 1 is a schematic diagram of carrier aggregation in an LTE-a system according to the prior art. As shown in fig. 1, each aggregated Carrier is referred to as a "Component Carrier" (CC), also referred to as a "cell". A plurality of (a plurality of in the present invention means two or more than two, unless otherwise specified) component carriers may be located in the same frequency band or may be located in different frequency bands.

In an LTE-A system, a physical uplink shared channel PUSCH can be transmitted by adopting a single antenna port, and can also be transmitted by adopting a plurality of antenna ports. The PUSCH transmitted by the single antenna port is scheduled by PDCCH DCI format0, and the PUSCH transmitted by the multi-antenna port is scheduled by PDCCH DCI format 4. Trigger commands for aperiodic CSI reporting are included in both DCI format0 and DCI format 4.

In the LTE-a system, a base station may configure (configure) or activate (activate) one or more component carriers for a ue to send downlink signals, and the ue needs to feed back CSI to each configured (configured) or activated (activated) component carrier. According to a triggering mode of an aperiodic CSI report in an LTE system, for a Time Division Duplex (TDD) system, when a base station triggers a user equipment to feed back the aperiodic CSI report of a certain component carrier, the user equipment must be scheduled to send a PUSCH on the component carrier; for a Frequency Division Duplex (FDD) system, in order to trigger the ue to feed back an aperiodic CSI report of a downlink Component Carrier (DL CC), the base station must schedule the ue to send a PUSCH on an Uplink Component Carrier (UL CC) corresponding to the downlink Component Carrier. And further sending a trigger command CQI request with 1bit (bit) set to be 1 in a PDCCH of a downlink control information format (including DCIformat 0 and DCI format 4) for scheduling the PUSCH so as to trigger the user equipment to feed back the aperiodic CSI report to the component carrier.

In addition, in the LTE-a FDD system, each downlink component carrier has an uplink component carrier corresponding to it. The correspondence between the uplink and downlink component carriers is preset and is notified to the UE by the base station through a second Type System Information Block (SIB-2) Type 2. Therefore, the correspondence relationship between the uplink component carrier and the downlink component carrier in the LTE-a FDD system is also called SIB-2 correspondence or SIB-2 association (SIB-2 linking), and a pair of uplink and downlink component carriers are component carriers (SIB-2 linked CCs) corresponding to (associated with) the SIB-2.

The base station may configure or activate different numbers of uplink and downlink component carriers for the ue, as shown in fig. 2. The UE-specific component Carrier (PCC) includes at least one pair of PCC, including a downlink PCC and an uplink PCC corresponding to the downlink PCC. The primary component carrier of different user equipment may be different. In addition to a pair of primary Component carriers, the base station may configure or activate one or more downlink slave Component carriers (Secondary Component carriers) and one or more uplink slave Component carriers for the user equipment.

When the UE is triggered to report the aperiodic CSI, for example, the base station may need to trigger the aperiodic CSI report of each component carrier more frequently because uplink and downlink services are asymmetric, and thus the base station needs to schedule the UE to send the PUSCH on the corresponding component carrier more frequently. In fact, except for the triggered aperiodic CSI report, the UE may have not much uplink data to be carried on the PUSCH and sent to the base station, thereby causing additional signaling overhead and uplink resource waste. In the FDD system, it is also possible that the base station configures or activates a downlink component carrier DL CC for the UE, but does not configure or activate an uplink component carrier UL CC corresponding to the DL CC for the user equipment, and according to the triggering manner of the aperiodic CSI report in the LTE system, the base station cannot trigger the UE to feed back the aperiodic CSI report of the DL CC.

In summary, in the LTE-a system, the existing triggering method for aperiodic CSI reports is not flexible enough, which may cause waste of system resources or cause a situation that the UE cannot feed back aperiodic CSI reports of some DL CCs.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a technology for a base station to notify an aperiodic CSI report trigger mode, so as to solve the problem in the prior art that the trigger mode of aperiodic CSI feedback is not flexible enough.

In order to solve the above technical problem, the present invention first provides a method for a base station to notify a trigger mode of an aperiodic Channel State Information (CSI) report, wherein at least one trigger mode and a corresponding trigger mode of the aperiodic CSI report are predefined, the method comprising:

the base station selects a trigger mode from the predefined trigger modes and selects a corresponding trigger mode;

the base station informs User Equipment (UE) of the selected trigger mode through the selected trigger mode;

the predefined trigger mode includes at least one of a trigger command, a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) including the trigger command, a search space of the PDCCH including the trigger command, a high-layer parameter, and a high-layer signaling.

Preferably, the predefined triggering pattern of the aperiodic CSI report is used for triggering the aperiodic CSI report of the UE feedback component carrier, and comprises at least one of:

(1) for a Frequency Division Duplex (FDD) system, the component carrier is a downlink component carrier corresponding to a second system information block (SIB-2) of an uplink component carrier carrying the aperiodic CSI report; for a Time Division Duplex (TDD) system, the component carrier is a component carrier carrying the aperiodic CSI report;

(2) for an FDD system, the component carriers are all downlink component carriers configured or activated by the UE; for a TDD system, the component carriers are all configured or activated component carriers of the UE;

(3) for an FDD system, the component carriers are all downlink component carriers configured or activated by the UE except the downlink component carrier corresponding to the SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the component carriers are all configured or activated component carriers of the UE except the component carrier carrying the aperiodic CSI report;

(4) the component carrier is a preset component carrier or an activated component carrier in the preset component carrier;

(5) for an FDD system, the component carrier is a preset downlink component carrier or a downlink component carrier activated in the preset downlink component carrier except the downlink component carrier corresponding to the SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the component carrier is a preset component carrier or an activated component carrier in the preset component carrier except for the component carrier carrying the aperiodic CSI report;

(6) for an FDD system, the component carrier is a downlink component carrier configured or activated by the UE, and the uplink component carrier corresponding to the SIB-2 is an uplink component carrier not configured or activated by the UE.

Preferably, the trigger command is 1 bit.

Preferably, the trigger mode selected by the base station is the trigger mode (1), the trigger mode (2) or the trigger mode (4), wherein for the trigger mode (4), a component carrier group X is preset.

Preferably, for the trigger mode (4), for an FDD system, the default configuration of the component carrier group X is configured to be a downlink component carrier corresponding to SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the default configuration of the component carrier group X is the component carrier carrying the aperiodic CSI report.

Preferably, the predetermined component carrier group X includes one or more component carriers and is configured by a higher layer signaling.

Preferably, when the PDCCH including the trigger command is in a public search space and a ue-specific search space, the trigger mode selected by the base station is different.

Preferably, the PDCCH including the trigger command, and when the search space is public, the trigger mode selected by the base station is the trigger mode (1); when the user equipment has a special search space, the trigger mode selected by the base station is the trigger mode (2);

or,

the PDCCH comprising the trigger command, and when a search space is public, the trigger mode selected by the base station is the trigger mode (1); when the user equipment has a special search space, the trigger mode selected by the base station is the trigger mode (4);

or,

the PDCCH comprising the trigger command, and when a search space is public, the trigger mode selected by the base station is the trigger mode (2); when the user equipment has a special search space, the trigger mode selected by the base station is the trigger mode (4);

wherein, for the trigger mode (4), a component carrier group X is preset.

Preferably, the trigger command is M bits, M is greater than 1, and different states of the trigger command correspond to the predefined at least one trigger mode.

Preferably, when the trigger command is 2bits, the different states of the 2bits,

respectively correspond to:

not triggering an aperiodic CSI report;

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (1);

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (2); and

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (3), (4), (5) or (6); wherein for the trigger mode (4) or (5), a component carrier group Y is preset;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (3); and

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (2), (4), (5) or (6); wherein for the trigger mode (4) or (5), a component carrier group Y is preset;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering an aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (6); and

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (2), (3), (4) or (5); wherein for the trigger mode (4) or (5), a component carrier group Y is preset;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering an aperiodic CSI report, defaulting the triggering mode selected by the base station to the triggering mode (1), (2), (3) or (6) when no higher layer signaling is configured, and setting the triggering mode selected by the base station to the triggering mode (4) or (5) when the higher layer signaling is configured; wherein for the trigger mode (4) or (5), a component carrier group Y is preset;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (2), (3), (4), (5) or (6); wherein for the trigger mode (4) or (5), a component carrier group Y is preset; and

reserving;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering aperiodic CSI report, and the triggering mode selected by the base station is the triggering mode (1) or (2);

triggering an aperiodic CSI report, wherein the triggering mode selected by the base station is the triggering mode (4), and a component carrier group Y is preset; and

triggering an aperiodic CSI report, wherein the triggering mode selected by the base station is the triggering mode (4), and a component carrier group Z is preset;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering an aperiodic CSI report, wherein the triggering mode selected by the base station is the triggering mode (5), and a component carrier group Y is preset; and

triggering an aperiodic CSI report, wherein the triggering mode selected by the base station is the triggering mode (5), and a component carrier group Z is preset;

wherein the preset component carrier group Y and the preset component carrier group Z are two component carrier groups defined respectively.

Preferably, the preset component carrier group Y and the component carrier group Z include one or more component carriers and are configured by a higher layer signaling.

Preferably, in PDCCH DCI format0, the trigger command is 1bit or M bits, and M is greater than 1.

Preferably, in PDCCH DCI format0, the trigger command is 1bit or M bit, and M is greater than 1 and configured by a higher layer parameter.

Preferably, when the PDCCH DCI format0 is in the public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in a special search space of user equipment, the trigger command is M bits, and M is greater than 1;

or,

when the PDCCH DCI format0 is in a public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in the dedicated search space of the ue, the trigger command is 1bit or M bits, and M is greater than 1, and configured by a high-level parameter.

Preferably, in the PDCCH DCI format 4, the trigger command is 1bit or M bits, and M is greater than 1.

Preferably, in the PDCCH DCI format 4, the trigger command is 1bit or M bit, and M is greater than 1 and configured by a higher layer parameter.

Preferably, the higher layer parameter is 1bit,

when the high-level parameter is configured to be 0, the trigger command is 1 bit;

when the high-level parameter is configured to be 1, the trigger command is M bits, and M is greater than 1;

the default value of the high-level parameter is "0" or "1";

or,

when the high-level parameter is configured to be 1, the trigger command is 1 bit;

when the high-level parameter is configured to be 0, the trigger command is M bits, and M is greater than 1;

the default value of the high-level parameter is "1" or "0".

Preferably, in the PDCCH DCI formats 0 and 4, the trigger command is 1bit or M bit, and M is greater than 1, and the PDCCH DCI formats 0 and 4 are configured by a higher layer parameter in a unified manner or configured separately.

Preferably, M is equal to 2.

Preferably, the higher layer signaling is radio resource control signaling.

In order to solve the above technical problem, the present invention further provides a base station for notifying a trigger mode of an aperiodic Channel State Information (CSI) report, including a storage module, a selection module, and a notification module, wherein:

the storage module is configured to store at least one predefined trigger mode and a corresponding trigger mode of the aperiodic CSI report;

the selection module is used for selecting one trigger mode from predefined trigger modes and selecting a corresponding trigger mode;

the notifying module is configured to notify a User Equipment (UE) of the trigger mode selected by the selecting module through the trigger mode selected by the selecting module;

Preferably, the predefined trigger pattern of the aperiodic CSI report stored by the storage module is used for triggering aperiodic CSI report of the UE feedback component carrier, and comprises at least one of the following:

Preferably, in the predefined trigger manner stored in the storage module, the trigger command is 1 bit.

Preferably, the base station further comprises:

a presetting module 440, configured to preset a component carrier group X for the trigger mode (4);

wherein the trigger mode selected by the selection module is the trigger mode (1), the trigger mode (2) or the trigger mode (4).

Preferably, the trigger mode (4) selected by the selection module is that, for an FDD system, the default configuration of the component carrier group X is configured to be a downlink component carrier corresponding to SIB-2 of an uplink component carrier carrying the aperiodic CSI report; for a TDD system, the default configuration of the component carrier group X is the component carrier carrying the aperiodic CSI report.

Preferably, the preset component carrier group X stored in the storage module includes one or more component carriers, and is configured by a higher layer signaling.

Preferably, when the PDCCH including the trigger command is in a public search space and a ue-specific search space, the trigger mode selected by the selection module is different.

Preferably, the selection module is configured to select the trigger mode (1) when the PDCCH including the trigger command has a common search space; selecting the trigger mode (2) by the PDCCH containing the trigger command when a User Equipment (UE) has a special search space;

or,

the selection module is used for selecting the trigger mode (1) when the PDCCH containing the trigger command has a public search space; the PDCCH containing the trigger command selects the trigger mode (4) when a User Equipment (UE) has a special search space;

or,

the selection module is used for selecting the trigger mode (2) when the PDCCH containing the trigger command has a public search space; the PDCCH containing the trigger command selects the trigger mode (4) when a User Equipment (UE) has a special search space;

wherein, for the trigger mode (4), a component carrier group X is preset.

Preferably, in the predefined trigger mode stored in the storage module, the trigger command is M bits, M is greater than 1, and different states of the trigger command correspond to the predefined at least one trigger mode.

Preferably, the base station further comprises:

the device comprises a presetting module, a detection module and a control module, wherein the presetting module is used for presetting a component carrier group Y and a component carrier group Z, and the component carrier group Y and the component carrier group Z are two component carrier groups which are respectively defined;

wherein the notification module is configured to notify the trigger command of the 2bits of the different status when the trigger command is 2bits,

respectively correspond to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (1);

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (2); and

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (3), (4), (5) or (6); for the trigger mode (4) or (5), the presetting module is used for presetting the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (3); and

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (2), (4), (5) or (6); for the trigger mode (4) or (5), the presetting module is used for presetting the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (6); and

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (2), (3), (4) or (5); for the trigger mode (4) or (5), the presetting module is used for presetting the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger an aperiodic CSI report, and when there is no higher layer signaling configuration, the trigger mode selected by the selection module defaults to the trigger mode (1), (2), (3) or (6), and when there is a higher layer signaling configuration, the trigger mode selected by the selection module is the trigger mode (4) or (5); for the trigger mode (4) or (5), the presetting module is used for presetting the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (2), (3), (4), (5) or (6); for the trigger mode (4) or (5), the presetting module is used for presetting the component carrier group Y; and

reserving;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (1) or (2);

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (4), and the preset module is used for presetting the component carrier group Y; and

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (4), and the preset module is used for presetting the component carrier group Z;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (5), and the preset module is used for presetting the component carrier group Y; and

and informing the UE of triggering the aperiodic CSI report, wherein the triggering mode selected by the selection module is the triggering mode (5), and the preset module is used for presetting the component carrier group Z.

Preferably, the component carrier group Y and the component carrier group Z preset by the preset module include one or more component carriers configured by a high-level signaling.

Preferably, in PDCCH DCI format0, in the trigger manner stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1.

Preferably, in PDCCH DCI format0, in the trigger manner stored in the storage module, the trigger command is 1bit or M bit, and M is greater than 1 and configured by a higher layer parameter.

Preferably, when the PDCCH DCI format0 is in the public search space, the trigger command is 1bit in the trigger manner stored in the storage module; when the PDCCH DCI format0 is in the dedicated search space of the ue, in the trigger mode stored in the storage module, the trigger command is M bits, and M is greater than 1;

or,

when the PDCCH DCI format0 is in the public search space, the trigger command is 1bit in the trigger mode stored in the storage module; when the PDCCH DCI format0 is in the dedicated search space of the ue, in the trigger mode stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1, and configured by a high-level parameter.

Preferably, in the PDCCH DCI format 4, in the trigger manner stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1.

Preferably, in the PDCCH DCI format 4, in the trigger manner stored in the storage module, the trigger command is 1bit or M bit, and M is greater than 1 and configured by a higher layer parameter.

Preferably, the higher layer parameter is 1bit,

when the high-level parameter is configured to be '0', the trigger command is 1bit in the trigger mode stored by the storage module;

when the high-level parameter is configured to be '1', in a trigger mode stored by the storage module, the trigger command is M bits and is greater than 1;

the default value of the high-level parameter is "0" or "1";

or,

when the high-level parameter is configured to be '1', the trigger command is 1bit in the trigger mode stored by the storage module;

when the high-level parameter is configured to be '0', in a trigger mode stored by the storage module, the trigger command is M bits and is greater than 1;

the default value of the high-level parameter is "1" or "0".

Preferably, in PDCCH DCI formats 0 and 4, in the trigger mode stored by the storage module, the trigger command is 1bit or M bit, and M is greater than 1, and the PDCCH DCI formats 0 and 4 are configured by a higher layer parameter in a unified manner or configured separately.

Preferably, M is equal to 2.

Preferably, the higher layer signaling is radio resource control signaling.

Compared with the prior art, the method and the device have the advantages that the triggering mode and the triggering mode are predefined, and the selected triggering mode is notified to the UE in the selected triggering mode, so that the problem that the triggering mode of the aperiodic CSI report is not flexible in the prior art is solved, the flexibility of triggering the aperiodic CSI report is improved, the triggering time delay of the aperiodic CSI report is reduced, the triggering signaling cost and the transmission cost are saved, the waste of system resources is avoided, and the situations that the UE cannot feed back the aperiodic CSI reports of some DL CCs and the like are avoided.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of carrier aggregation in an LTE-a system in the prior art;

fig. 2 is a schematic diagram of carrier aggregation of a user equipment in an LTE-a FDD system in the prior art;

FIG. 3 is a schematic diagram illustrating a method for notifying an aperiodic CSI report trigger mode by a base station according to the present invention;

fig. 4 is a schematic structural diagram of a base station for notifying a trigger mode of an aperiodic CSI report according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Fig. 3 is a schematic diagram illustrating a method for notifying a trigger mode of an aperiodic CSI report by a base station according to the present invention. At first, at least one trigger mode and corresponding trigger mode of aperiodic CSI report are predefined, as shown in fig. 3, the method of the present invention mainly includes the following steps:

step S310, the base station selects a trigger mode from predefined trigger modes and selects corresponding trigger modes (one or two or more);

step S320, the base station notifies the selected trigger mode to the UE through the selected trigger mode.

The triggering method includes at least one of a search space, a higher layer parameter and a higher layer signaling according to the triggering command, the DCI format of the PDCCH including the triggering command, the PDCCH including the triggering command.

The predefined triggering mode of aperiodic CSI feedback includes one or more of the following.

(1) Triggering the UE to feed back the aperiodic CSI report of the component carrier by a trigger command, wherein for an FDD system, the component carrier is a downlink component carrier corresponding to an SIB-2 of an uplink component carrier for bearing the aperiodic CSI report; for TDD systems, the component carrier is the component carrier carrying the aperiodic CSI report.

The (uplink) component carrier carrying the aperiodic CSI report may also be described as the (uplink) component carrier scheduled by the uplink scheduling grant signaling containing the trigger command, that is, the PUSCH scheduled by the uplink scheduling grant signaling containing the trigger command is transmitted on the (uplink) component carrier.

(2) Triggering the UE to feed back the aperiodic CSI report of the component carrier by the triggering command, wherein the component carrier is all downlink component carriers configured or activated by the UE for an FDD system; for TDD systems, the component carrier is all configured or activated component carriers for the UE.

(3) Triggering a non-periodic CSI report of a component carrier fed back by UE through a trigger command, wherein for an FDD system, the component carrier is all downlink component carriers configured or activated by the UE except a downlink component carrier corresponding to an SIB-2 of an uplink component carrier carrying the non-periodic CSI report; for a TDD system, the component carriers are all configured or activated component carriers for the UE except the component carrier carrying the aperiodic CSI report.

(4) The triggering command triggers the UE to feed back the aperiodic CSI report of the component carrier, wherein the component carrier is a preset component carrier group or an activated component carrier in the preset component carrier group.

The preset component carrier group is all or part of the component carriers configured or activated by the UE.

The pre-configured component carrier is configured by higher layer signaling, such as Radio Resource Control (RRC) signaling.

The predetermined component carrier group may include one or more component carriers.

The predetermined component carrier may be configured based on UE (UE specific), that is, the predetermined component carrier may be different for different UEs. The preset ccs are configured with only one group for one UE, or the preset ccs are configured with one or more groups for one UE (unless otherwise specified, "groups" in the present invention mean two or more groups);

alternatively, the predetermined component carrier may be configured based on a component carrier (CC specific), or configured based on a cell (cell specific), that is, the predetermined component carrier may be different for different component carriers carrying the aperiodic CSI report. The preset component carrier is only configured with one group to one component carrier, or the preset component carrier is configured with one group or multiple groups to one component carrier;

alternatively, the predetermined component carrier may be configured based on a UE configured or activated component carrier, i.e., the predetermined component carrier may be different for different UEs or different component carriers carrying the aperiodic CSI report. The preset component carrier is configured with only one group for one component carrier of one UE, or the preset component carrier is configured with one or more groups for one component carrier of one UE.

(5) Triggering the UE to feed back the aperiodic CSI report of the component carrier by a trigger command, wherein for an FDD system, the component carrier is a preset downlink component carrier or a downlink component carrier activated in the preset downlink component carrier except the downlink component carrier corresponding to the SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for the TDD system, the cc is a predetermined cc or an activated cc among predetermined ccs except for ccs carrying the aperiodic CSI report.

The predetermined component carriers are as described in the trigger mode (4), and are not described herein again.

(6) For an FDD system, a trigger command triggers UE to feed back an aperiodic CSI report of a component carrier, wherein the component carrier is a downlink component carrier configured or activated by the UE, and an uplink component carrier corresponding to an SIB-2 is an uplink component carrier not configured or activated by the UE.

The trigger command may be 1bit, or may be more than 1bit (i.e., M bit and M is more than 1).

When the trigger command is 1bit

And when the trigger command is 1bit, one state of the trigger command corresponds to not triggering the aperiodic CSI report, and the other state corresponds to the predefined at least one trigger mode.

When the trigger command is 1bit, the corresponding trigger mode is one of the six trigger modes.

Preferably, when the trigger command is 1bit, the trigger mode is the trigger mode (1), or the trigger mode (2), or the trigger mode (4).

Or, when the trigger command is 1bit and the PDCCH including the trigger command is in a public search space and a ue-specific search space, the trigger modes may be different. For example, when the PDCCH including the trigger command has a common search space, the trigger mode is the trigger mode (1); when the user equipment has a dedicated search space, the trigger mode is the trigger mode (2), or when the PDCCH containing the trigger command has a common search space, the trigger mode is the trigger mode (1); when the user equipment has a dedicated search space, the triggering mode is set as (4), or when the PDCCH containing the triggering command has a common search space, the triggering mode is set as (2); when the user equipment has a special search space, the method is in a trigger mode (4);

wherein, for the trigger mode (4), a component carrier group X is preset.

Preferably, for an FDD system, the component carrier group X is defaulted to a downlink component carrier corresponding to SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the component carrier group X is by default the component carrier carrying the aperiodic CSI report.

(II) when the trigger command is M bit and M is more than 1

When the trigger command is larger than 1bit, different states of the trigger command can correspond to different trigger modes.

For example, when the trigger command is 2bits,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the state of '01' is corresponding to triggering the aperiodic CSI report, and the triggering mode is the triggering mode (1);

the 10 state corresponds to triggering the aperiodic CSI report, and the triggering mode is the triggering mode (2);

the '11' state triggers the aperiodic CSI report correspondingly, the trigger mode is the trigger mode (3), (4), (5) or (6), and the component carrier group Y is preset for the trigger mode (4) or (5);

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the 10 state is corresponding to the triggering of the aperiodic CSI report, and the triggering mode is the triggering mode (3);

the '11' state triggers the aperiodic CSI report correspondingly, the trigger mode is the trigger mode (2), (4), (5) or (6), and the component carrier group Y is preset for the trigger mode (4) or (5);

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the 10 state is corresponding to the triggering of the aperiodic CSI report, and the triggering mode is the triggering mode (6);

the '11' state triggers the aperiodic CSI report correspondingly, the trigger mode is the trigger mode (2), (3), (4) or (5), and the component carrier group Y is preset for the trigger mode (4) or (5);

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the '11' state triggers the aperiodic CSI report correspondingly, and when there is no configuration of high-layer signaling (such as RRC signaling), the triggering mode defaults to the triggering mode (1), (2), (3) or (6), when there is RRC signaling configuration, the triggering mode is the triggering mode (4) or (5), and for the triggering mode (4) or (5), the component carrier group Y is preset;

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the '10' state is corresponding to triggering the aperiodic CSI report, the triggering mode is the triggering mode (2), (3), (4), (5) or (6), and the component carrier group Y is preset for the triggering mode (4) or (5);

the "11" state remains;

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the 10 state triggers the aperiodic CSI report correspondingly, the triggering mode is a triggering mode (4), and a component carrier group Y is preset;

the '11' state triggers the aperiodic CSI report correspondingly, the triggering mode is the triggering mode (4), and the component carrier group Z is preset;

or,

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the 10 state triggers the aperiodic CSI report correspondingly, the triggering mode is a triggering mode (5), and a component carrier group Y is preset;

the '11' state triggers the aperiodic CSI report correspondingly, the triggering mode is a triggering mode (5), and a component carrier group Z is preset;

the preset component carrier group Y and the preset component carrier group Z are two respectively defined component carrier groups;

wherein the predetermined component carrier group X is equal to the predetermined component carrier group Y, or the predetermined component carrier group X is equal to the predetermined component carrier group Z, or the predetermined component carrier group X is a separately defined component carrier group.

When the trigger command is 2bits, the "00" state, the "01" state, the "10" state, and the "11" state may correspond to other states besides the above-described corresponding states. For example, for the first scenario above, the "11" state corresponds to no aperiodic CSI report being triggered; the '10' state corresponds to triggering the aperiodic CSI report, and the triggering mode is the triggering mode (1); the state of '01' is corresponding to triggering the aperiodic CSI report, and the triggering mode is the triggering mode (2); the '00' state corresponds to triggering aperiodic CSI reports, and the trigger mode is the trigger mode (3), (4), (5) or (6), and the component carrier group Y is preset for the trigger mode (4) or (5).

In addition, when the trigger command is 1bit or 2bits, the preset component carrier groups may be the same or different for the trigger mode (4) or (5).

Preferably, in PDCCH DCI format0 and PDCCH DCI format 4, the trigger command is 1 bit.

Or, in both PDCCH DCI format0 and PDCCH DCI format 4, the trigger command is greater than 1bit (e.g., 2 bits).

Or,

in PDCCH DCI format 4, the trigger command is larger than 1bit (e.g., 2 bit).

In the PDCCH DCI format0, the trigger command is 1 bit.

Or,

in PDCCH DCI format 4, the trigger command is larger than 1bit (e.g., 2 bit).

When the PDCCH DCI format0 is in the public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in the search space exclusively owned by the user equipment, the trigger command is larger than 1bit (for example, 2 bits).

Or,

in PDCCH DCI format 4, the trigger command is larger than 1bit (e.g., 2 bit).

When the PDCCH DCI format0 is in the public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in the ue-specific search space, the trigger command is 1bit or more than 1bit (e.g., 2 bits), and may be specifically configured by a higher layer parameter.

For example, the higher layer parameter is 1 bit.

When the high-layer parameter is configured to be '0', in the PDCCH DCI format0, a trigger command for triggering the aperiodic CSI report is 1 bit;

when the high-layer parameter is configured to be '1', when the PDCCH DCI format0 is in a public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in a special search space of user equipment, the trigger command is 2 bits;

the default value of the high-level parameter is "0";

or, the high-level parameter is also 1 bit;

when the high-layer parameter is configured to be '1', in a PDCCH DCI format0, a trigger command for triggering the aperiodic CSI report is 1 bit;

when the high-layer parameter is configured to be '0', and when the PDCCH DCI format0 is in a public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in a special search space of user equipment, the trigger command is 2 bits;

the default value of the high layer parameter is "1".

The trigger command is also referred to as a channel quality indication request (CQI request).

Example one

In FDD systems, a base station activates a pair of primary component carriers DL CC0 and UL CC0, a pair of secondary component carriers DL CC1 and UL CC1, and two downlink secondary component carriers DL CC2 and DL CC3 (the corresponding uplink secondary component carriers UL CC2 and UL CC3 are not configured or activated) for a user equipment.

The triggering modes of the aperiodic CSI feedback are three triggering modes (1), (2) or (4). And for the triggered mode (4), the preset component carrier group is configured based on ue (ue specific), and only 1 group (component carrier group Y) is configured as DL CC2 and DL CC 3.

The triggering command for triggering the aperiodic CSI report in the PDCCH DCI format 4 is 2 bits:

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "01" state corresponds to triggering aperiodic CSI reporting and is in the trigger mode (1);

the "10" state corresponds to triggering aperiodic CSI reporting and is in the trigger mode (2);

the "11" state corresponds to triggering aperiodic CSI reporting and is the trigger mode (4).

The triggering command for triggering the aperiodic CSI report in the PDCCH DCI format0 is 1 bit:

the "0" state corresponds to not triggering aperiodic CSI reports;

the "1" state corresponds to triggering aperiodic CSI reporting and is in trigger mode (1), (2), or (4);

or,

when PDCCH DCI format0 is in the common search space,

the "0" state corresponds to not triggering aperiodic CSI reports;

the '1' state corresponds to triggering aperiodic CSI reports and is in the trigger mode (1);

when PDCCH DCI format0 is in the user equipment-specific search space,

the "0" state corresponds to not triggering aperiodic CSI reports;

the "1" state corresponds to triggering aperiodic CSI reporting and is in trigger mode (2) or (4).

Example two

The triggering modes of the aperiodic CSI feedback are the triggering modes (1) or (4). And for the triggered mode (4), the preset component carrier group is configured based on ue (ue specific), and two groups (component carrier group Y and component carrier group Z) are configured, DL CC1 and DL CC2, and DL CC0 and DL CC3, respectively.

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "10" state corresponds to triggering aperiodic CSI reporting and is in the trigger mode (4), and the corresponding predetermined component carrier groups are DL CC1 and DL CC 2;

the "11" state corresponds to triggering aperiodic CSI reporting and is in the triggered mode (4), and the corresponding set of predetermined component carriers are DL CC0 and DL CC 3.

the "0" state corresponds to not triggering aperiodic CSI reports;

the "1" state corresponds to triggering aperiodic CSI reporting and is the trigger mode (1).

EXAMPLE III

The triggering modes of the aperiodic CSI feedback are three triggering modes (1), (2) or (4). And for the trigger mode (4), the preset component carrier group is configured based on the uplink component carriers activated by the UE, and only one group is configured, DL CC0 and DL CC3 for UL CC0, and DL CC1 and DL CC2 for UL CC 1.

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "11" state triggers the aperiodic CSI report correspondingly and is in the trigger mode (4), and if the uplink component carrier carrying the aperiodic CSI report is UL CC0, the corresponding predetermined component carrier groups are DL CC0 and DL CC 3; if the uplink component carrier carrying the aperiodic CSI report is UL CC1, the corresponding set of component carriers are DL CC1 and DL CC 2.

the "0" state corresponds to not triggering aperiodic CSI reports;

the '1' state corresponds to triggering aperiodic CSI reports, and the triggering mode is (1), (2) or (4);

or,

when the PDCCH DCI format0 is in the public search space, the trigger command for triggering the aperiodic CSI report in the PDCCH DCI format0 is 1 bit:

the "0" state corresponds to not triggering aperiodic CSI reports;

when PDCCH DCI format0 is in the ue-specific search space, the trigger command in PDCCH DCI format0 for triggering aperiodic CSI report is 2 bits:

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "11" state triggers the aperiodic CSI report correspondingly and is in the trigger mode (4), and if the uplink component carrier carrying the aperiodic CSI report is UL CC0, the corresponding predetermined component carrier groups are DL CC0 and DL CC 3; if the uplink component carrier carrying the aperiodic CSI report is UL CC1, the corresponding preset component carrier groups are DL CC1 and DL CC 2.

Example four

The triggering modes of the aperiodic CSI feedback are the triggering modes (1) or (4). And for the trigger mode (4), the preset component carrier group is configured based on ue (ue specific), and two groups (component carrier group Y and component carrier group Z) are configured, namely DL CC1 and DL CC2, and DL CC0 and DL CC3 (one component carrier group X can be optionally configured to be DL CC2 and DL CC 3).

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "10" state corresponds to triggering aperiodic CSI reports, and is in trigger mode (4), component carrier group Y;

the "11" state corresponds to triggering aperiodic CSI reports, and is in trigger mode (4), component carrier group Z;

the "0" state corresponds to not triggering aperiodic CSI reports;

the "1" state corresponds to triggering an aperiodic CSI report and is a triggering mode (1), (2), or (4) component carrier group Y, (4) component carrier group Z, or (4) component carrier group X;

or,

the "0" state corresponds to not triggering aperiodic CSI reports;

the '1' state corresponds to triggering an aperiodic CSI report and is a triggering mode (1), (2), (4) component carrier group Y, (4) component carrier group Z or (4) component carrier group X;

the "00" state corresponds to no triggering of aperiodic CSI reporting;

the "11" state corresponds to triggering aperiodic CSI reporting and is the trigger mode (4), component carrier group Z.

Fig. 4 is a schematic structural diagram of a base station for notifying a trigger mode of an aperiodic Channel State Information (CSI) report according to the present invention. As shown in fig. 4, the base station mainly includes a storage module 410, a selection module 420, and a notification module 430, wherein:

a storage module 410, configured to store at least one trigger mode and a corresponding trigger mode of a predefined aperiodic CSI report;

a selecting module 420 connected to the storing module 410, for selecting one of the predefined trigger modes and selecting a corresponding trigger mode (one, or two or more);

a notification module 430, connected to the storage module 410 and the selection module 420, configured to notify the UE of the trigger mode selected by the selection module 420 through the trigger mode selected by the selection module 420;

the predefined triggering mode comprises at least one of a triggering command, DCIformat of the PDCCH containing the triggering command, a search space of the PDCCH containing the triggering command, a high-layer parameter and high-layer signaling.

Wherein the predefined aperiodic CSI reporting trigger pattern stored in the storage module 410 is used for triggering the aperiodic CSI reporting of the UE feedback component carrier, and comprises at least one of the following:

(1) for an FDD system, the component carrier is a downlink component carrier corresponding to SIB-2 of an uplink component carrier for bearing the aperiodic CSI report; for a TDD system, the component carrier is a component carrier for carrying an aperiodic CSI report;

(2) for an FDD system, the component carriers are all downlink component carriers configured or activated by the UE; for a TDD system, the component carriers are all configured or activated by the UE;

(5) for an FDD system, the component carrier is a preset downlink component carrier or a downlink component carrier activated in the preset downlink component carrier except the downlink component carrier corresponding to the SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the component carrier is a preset component carrier except for the component carrier carrying the aperiodic CSI report or an activated component carrier in the preset component carrier;

(6) for the FDD system, the component carrier is a downlink component carrier configured or activated by the UE, and the uplink component carrier corresponding to the SIB-2 is an uplink component carrier not configured or activated by the UE.

The selecting module 420 is used for selecting one of the trigger modes (1) to (6) when the trigger command is 1 bit.

Further, the base station further comprises:

a presetting module 440 connected to the storage module 410, configured to preset a component carrier group X for the trigger mode (4);

the trigger mode selected by the selection module 420 is a trigger mode (1), a trigger mode (2) or a trigger mode (4).

Further, the trigger mode (4) selected by the selecting module 420 is that, for the FDD system, the default configuration of the component carrier group X is configured to be the downlink component carrier corresponding to the SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for TDD systems, the default configuration of component carrier set X is the component carrier carrying the aperiodic CSI report.

And, the preset component carrier group X stored in the storage module 410 includes one or more component carriers, and is configured by the higher layer signaling.

In the base station, when the PDCCH including the trigger command is in the public search space and the ue-specific search space, the trigger mode selected by the selection module 420 is different.

Further, the selecting module 420 is configured to select the trigger mode (1) when the PDCCH including the trigger command has a common search space; when the PDCCH containing the trigger command is in a search space exclusive to the user equipment, selecting a trigger mode (2);

or,

the selection module 420 is configured to select the trigger mode (1) when the PDCCH including the trigger command has a common search space; when the PDCCH containing the trigger command is in a search space exclusive to the user equipment, selecting a trigger mode (4);

or,

the selection module 420 is configured to select the trigger mode (2) when the PDCCH including the trigger command has a common search space; when the PDCCH containing the trigger command is in a search space exclusive to the user equipment, selecting a trigger mode (4);

in the trigger mode (4), a component carrier group X is set in advance.

In the base station, in the predefined trigger modes stored in the storage module 410, the trigger command is M bits and M is greater than 1, and different states of the trigger command correspond to at least one predefined trigger mode.

Further, the base station further comprises:

a presetting module 440 connected to the storage module 410, configured to preset a component carrier group Y and a component carrier group Z, where the component carrier group Y and the component carrier group Z are two component carrier groups defined separately;

wherein, the notification module 430 is configured to, when the trigger command is 2bits, different states of 2bits,

respectively correspond to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as trigger mode (1);

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as trigger mode (2); and

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as trigger mode (3), (4), (5), or (6); for the trigger mode (4) or (5), the presetting module 440 is configured to preset the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as trigger mode (3); and

informing the UE to trigger aperiodic CSI reporting, and the trigger mode selected by the selection module 420 being trigger mode (2), (4), (5) or (6); for the trigger mode (4) or (5), the presetting module 440 is configured to preset the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as the trigger mode (6); and

informing the UE to trigger aperiodic CSI reporting, and selecting the trigger mode selected by the module 420 as trigger mode (2), (3), (4), or (5); for the trigger mode (4) or (5), the presetting module 440 is configured to preset the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and when there is no higher layer signaling (such as RRC signaling) configuration, the trigger mode selected by the selection module 420 defaults to trigger mode (1), (2), (3), or (6), and when there is RRC signaling configuration, the trigger mode selected by the selection module 420 is trigger mode (4) or (5); for the trigger mode (4) or (5), the presetting module 440 is configured to preset the component carrier group Y;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and the trigger mode selected by the selection module 420 being trigger mode (2), (3), (4), (5), or (6); for the trigger mode (4) or (5), the presetting module 440 is configured to preset the component carrier group Y; and

reserving;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger aperiodic CSI reporting, and the trigger mode selected by the selection module 420 being trigger mode (1) or (2);

notifying the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selecting module 420 is the trigger mode (4), and the presetting module 440 is configured to preset the component carrier group Y; and

notifying the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selection module 420 is the trigger mode (4), and the preset module 440 is configured to preset the component carrier group Z;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

notifying the UE to trigger the aperiodic CSI report, wherein the trigger mode selected by the selecting module 420 is the trigger mode (5), and the presetting module 440 is configured to preset the component carrier group Y; and

the UE is informed to trigger aperiodic CSI report, and the trigger mode selected by the selection module 420 is trigger mode (5), and the presetting module 440 is used to preset the component carrier group Z.

Furthermore, the component carrier group Y and the component carrier group Z preset by the presetting module 440 include one or more component carriers, which are configured by high-level signaling.

In the base station, in the PDCCH DCI format0, the trigger mode stored in the storage module 410 includes a trigger command with 1bit or M bits, and M is greater than 1.

In the base station, in the PDCCH DCI format0, the trigger mode stored in the storage module 410 is configured by a higher layer parameter, where the trigger command is 1bit or M bits and M is greater than 1.

In the base station, when the PDCCH DCI format0 is in the public search space, the trigger command is 1bit in the trigger manner stored in the storage module 410; when the PDCCH DCI format0 is in the dedicated search space of the ue, in the trigger mode stored in the storage module 410, the trigger command is M bits and M is greater than 1;

or,

when the PDCCH DCI format0 is in the public search space, the trigger command is 1bit in the trigger mode stored in the storage module 410; when the PDCCH DCI format0 is in the dedicated search space of the ue, the trigger mode stored in the storage module 410 is configured by a higher layer parameter, where the trigger command is 1bit or M bits and M is greater than 1.

In the base station, in the PDCCH DCI format 4, the trigger mode stored in the storage module 410 includes a trigger command with 1bit or M bits, and M is greater than 1.

In the base station, in the PDCCH DCI format 4, the trigger pattern stored in the storage module 410 is configured by a higher layer parameter, where the trigger command is 1bit or M bits and M is greater than 1.

Further, the air conditioner is provided with a fan,

the high-level parameter is 1bit,

when the high-level parameter is configured to be "0", the trigger command is 1bit in the trigger mode stored in the storage module 410;

when the high-level parameter is configured to be "1", in the trigger mode stored in the storage module 410, the trigger command is greater than 1 bits;

default values for high-level parameters are "0" or "1";

or,

when the high-level parameter is configured to be "1", the trigger command is 1bit in the trigger mode stored in the storage module 410;

when the high-level parameter is configured to be "0", in the trigger mode stored in the storage module 410, the trigger command is greater than 1 bit;

the default value of the higher layer parameter is "1" or "0".

And the number of the first and second groups,

in PDCCH DCI formats 0 and 4, in the trigger mode stored in the storage module 410, the trigger command is 1bit or M bits and M is greater than 1, and PDCCH DCI formats 0 and 4 are configured together or respectively by a higher layer parameter.

The above M, typically, may be equal to 2.

The higher layer signaling may be radio resource control signaling.

Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for a base station to inform a trigger mode of aperiodic Channel State Information (CSI) report, wherein at least one trigger mode and a corresponding trigger mode of the aperiodic CSI report are predefined, the method comprising:

the predefined triggering mode of the aperiodic CSI report is used for triggering the aperiodic CSI report of the UE feedback component carrier, and comprises at least one of the following:

(6) for an FDD system, the component carrier is a downlink component carrier configured or activated by the UE, and an uplink component carrier corresponding to the SIB-2 is an uplink component carrier not configured or activated by the UE;

the predefined trigger mode comprises a trigger command, a Downlink Control Information (DCI) format (format) of a Physical Downlink Control Channel (PDCCH) containing the trigger command, a search space of the PDCCH containing the trigger command, a high-level parameter and a high-level signaling; or, the predefined trigger mode includes a trigger command, a Downlink Control Information (DCI) format (format) of a Physical Downlink Control Channel (PDCCH) including the trigger command, a high-layer parameter, and a high-layer signaling;

the trigger command is M bits;

when M is larger than 1, different states of the trigger command correspond to the predefined at least one trigger mode;

when the trigger command is 2bits, the different states of the 2bits respectively correspond to:

not triggering an aperiodic CSI report;

the preset component carrier group Y and the preset component carrier group Z comprise one or more component carriers which are configured by high-level signaling;

the preset component carrier group Y and the preset component carrier group Z are two component carrier groups defined respectively.

2. The method of claim 1, wherein:

the trigger command is 1 bit.

3. The method of claim 2, wherein:

the trigger mode selected by the base station is the trigger mode (1), the trigger mode (2) or the trigger mode (4), wherein for the trigger mode (4), a component carrier group X is preset.

4. The method of claim 3, wherein:

for the trigger mode (4), for an FDD system, the default configuration of the component carrier group X is configured to be a downlink component carrier corresponding to SIB-2 of the uplink component carrier carrying the aperiodic CSI report; for a TDD system, the default configuration of the component carrier group X is the component carrier carrying the aperiodic CSI report.

5. The method of claim 3, wherein:

the predetermined component carrier group X includes one or more component carriers and is configured by a higher layer signaling.

6. The method of claim 1, wherein:

and when the PDCCH containing the trigger command is in a public search space and a user equipment special search space, the trigger mode selected by the base station is different.

7. The method according to claim 2 or 6, characterized in that:

the PDCCH comprising the trigger command, and when a search space is public, the trigger mode selected by the base station is the trigger mode (1); when the user equipment has a special search space, the trigger mode selected by the base station is the trigger mode (2);

or,

wherein, for the trigger mode (4), a component carrier group X is preset.

8. The method of claim 7, wherein:

9. The method of claim 1, wherein:

when the trigger command is 2bits, the different states of the 2bits,

respectively correspond to:

not triggering an aperiodic CSI report;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

reserving;

or, respectively corresponding to:

not triggering an aperiodic CSI report;

triggering aperiodic CSI report, wherein the triggering mode selected by the base station is the triggering mode (4), and a component carrier group Z is preset.

10. The method of claim 1, wherein:

in PDCCH DCI format0, the trigger command is 1bit or M bits, and M is greater than 1.

11. The method of claim 1, wherein:

in PDCCH DCI format0, the trigger command is 1bit or M bits, and M is greater than 1 and configured by a higher layer parameter.

12. The method of claim 1, wherein:

when the PDCCH DCI format0 is in a public search space, the trigger command is 1 bit; when the PDCCH DCI format0 is in a special search space of user equipment, the trigger command is M bits, and M is greater than 1;

or,

13. The method of claim 1, wherein:

in PDCCH DCI format 4, the trigger command is 1bit or M bits, and M is greater than 1.

14. The method of claim 1, wherein:

in the PDCCH DCI format 4, the trigger command is 1bit or M bits, and M is greater than 1 and configured by a higher layer parameter.

15. The method of claim 11, 12 or 14, wherein:

the high-layer parameter is 1bit,

the default value of the high-level parameter is "0" or "1";

or,

the default value of the high-level parameter is "1" or "0".

16. The method of claim 11, 12 or 14, wherein:

in the PDCCH DCI formats 0 and 4, the trigger command is 1bit or M bits, and M is greater than 1, and the PDCCH DCI formats 0 and 4 are configured by a higher layer parameter in a unified manner or configured separately.

17. The method according to any one of claims 10-14, wherein:

m is equal to 2.

18. The method of claim 1, 5 or 9, wherein:

the high layer signaling is radio resource control signaling.

19. A base station for notifying a trigger pattern for aperiodic Channel State Information (CSI) reporting, comprising a storing module, a selecting module, and a notifying module, wherein:

the predefined trigger pattern of the aperiodic CSI report stored by the storage module is used for triggering the aperiodic CSI report of the UE feedback component carrier, and comprises at least one of the following:

in a predefined trigger mode stored by the storage module, the trigger command is M bits;

the base station further comprises:

respectively correspond to:

informing the UE not to trigger an aperiodic CSI report;

informing the UE to trigger an aperiodic CSI report, wherein the trigger mode selected by the selection module is the trigger mode (5), and the preset module is used for presetting the component carrier group Z;

the component carrier group Y and the component carrier group Z preset by the preset module include one or more component carriers configured by a high-level signaling.

20. The base station of claim 19, wherein:

in the predefined trigger mode stored in the storage module, the trigger command is 1 bit.

21. The base station of claim 20, wherein the base station further comprises:

22. The base station of claim 21, wherein:

the trigger mode (4) selected by the selection module is that, for an FDD system, the default configuration of the component carrier group X is configured to be a downlink component carrier corresponding to an SIB-2 of an uplink component carrier carrying the aperiodic CSI report; for a TDD system, the default configuration of the component carrier group X is the component carrier carrying the aperiodic CSI report.

23. The base station of claim 21, wherein:

the preset component carrier group X stored in the storage module includes one or more component carriers, and is configured by a higher layer signaling.

24. The base station of claim 19, wherein:

and when the PDCCH containing the trigger command is in a public search space and a user equipment special search space, the trigger mode selected by the selection module is different.

25. The base station according to claim 20 or 24, characterized by:

the selection module is used for selecting the trigger mode (1) when the PDCCH containing the trigger command has a public search space; selecting the trigger mode (2) by the PDCCH containing the trigger command when a User Equipment (UE) has a special search space;

or,

wherein, for the trigger mode (4), a component carrier group X is preset.

26. The base station of claim 25, wherein:

27. The base station of claim 19, wherein the base station further comprises:

respectively correspond to:

informing the UE not to trigger an aperiodic CSI report;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

reserving;

or, respectively corresponding to:

informing the UE not to trigger an aperiodic CSI report;

and informing the UE of triggering the aperiodic CSI report, wherein the triggering mode selected by the selection module is the triggering mode (4), and the preset module is used for presetting the component carrier group Z.

28. The base station of claim 19, wherein:

in PDCCH DCI format0, in the trigger manner stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1.

29. The base station of claim 19, wherein:

in PDCCH DCI format0, in the trigger mode stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1 and configured by a higher layer parameter.

30. The base station of claim 19, wherein:

when the PDCCH DCI format0 is in the public search space, the trigger command is 1bit in the trigger mode stored in the storage module; when the PDCCH DCI format0 is in the dedicated search space of the ue, in the trigger mode stored in the storage module, the trigger command is M bits, and M is greater than 1;

or,

31. The base station of claim 19, wherein:

in the PDCCH DCI format 4, in the trigger manner stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1.

32. The base station of claim 19, wherein:

in the PDCCH DCI format 4, in the trigger mode stored in the storage module, the trigger command is 1bit or M bits, and M is greater than 1 and configured by a higher layer parameter.

33. The base station of claim 29, 30 or 32, wherein:

the high-layer parameter is 1bit,

the default value of the high-level parameter is "0" or "1";

or,

the default value of the high-level parameter is "1" or "0".

34. The base station of claim 29, 30 or 32, wherein:

in the PDCCH DCI formats 0 and 4, in the trigger mode stored in the storage module, the trigger command is 1bit or M bit, and M is greater than 1, and the PDCCH DCI formats 0 and 4 are configured by a higher layer parameter in a unified manner or in a separate manner.

35. The base station according to any of claims 28-32, characterized by:

m is equal to 2.

36. The base station of claim 19, 23 or 27, wherein:

the high layer signaling is radio resource control signaling.